CN106761779A - A kind of shallow-depth-excavation tunnel passes through the construction method of box culvert - Google Patents
A kind of shallow-depth-excavation tunnel passes through the construction method of box culvert Download PDFInfo
- Publication number
- CN106761779A CN106761779A CN201710059413.0A CN201710059413A CN106761779A CN 106761779 A CN106761779 A CN 106761779A CN 201710059413 A CN201710059413 A CN 201710059413A CN 106761779 A CN106761779 A CN 106761779A
- Authority
- CN
- China
- Prior art keywords
- tunnel
- construction
- box culvert
- section
- changeover portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010276 construction Methods 0.000 title claims abstract description 251
- 238000009412 basement excavation Methods 0.000 title claims abstract description 66
- 238000007665 sagging Methods 0.000 claims abstract description 69
- 238000000034 method Methods 0.000 claims abstract description 63
- 238000002360 preparation method Methods 0.000 claims abstract description 19
- 238000007689 inspection Methods 0.000 claims abstract description 14
- 230000007704 transition Effects 0.000 claims abstract description 12
- 238000005520 cutting process Methods 0.000 claims abstract description 9
- 238000007569 slipcasting Methods 0.000 claims description 55
- 238000001514 detection method Methods 0.000 claims description 40
- 238000007596 consolidation process Methods 0.000 claims description 38
- 239000002689 soil Substances 0.000 claims description 36
- 238000004062 sedimentation Methods 0.000 claims description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 238000004458 analytical method Methods 0.000 claims description 25
- 230000003014 reinforcing effect Effects 0.000 claims description 24
- 238000007363 ring formation reaction Methods 0.000 claims description 23
- 239000007921 spray Substances 0.000 claims description 23
- 230000005641 tunneling Effects 0.000 claims description 20
- 238000013461 design Methods 0.000 claims description 18
- 238000004088 simulation Methods 0.000 claims description 18
- 230000002787 reinforcement Effects 0.000 claims description 17
- 238000009434 installation Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 239000011435 rock Substances 0.000 claims description 12
- 239000004570 mortar (masonry) Substances 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 9
- 210000005239 tubule Anatomy 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000011835 investigation Methods 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 3
- 238000003786 synthesis reaction Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000008595 infiltration Effects 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003319 supportive effect Effects 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Geometry (AREA)
- Environmental & Geological Engineering (AREA)
- Computer Hardware Design (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses the construction method that a kind of shallow-depth-excavation tunnel passes through box culvert, the method is comprised the following steps：Step one, preparation of construction；Step 2, preparation section construction；Step 3, the size for determining box culvert section；Step 4, sagging Construction of Transition Section；Step 5, box culvert section construction；Step 6, on choose Construction of Transition Section；Step 7, ending section construction；Step 8, inspection supporting intensity；Step 9, the normal excavation for recovering institute's construction tunnel.Tunnel changes phase of the present invention is shorter, and the cutting depth of tunnel bottom is constant, only changes the cross sectional shape in tunnel, cleverly avoids influence of the existing box culvert to constructing tunnel, on the premise of construction safety is ensured, it is ensured that construction speed.
Description
Technical field
Box culvert is passed through the invention belongs to shallow-depth-excavation tunnel technical field of construction, more particularly to a kind of shallow-depth-excavation tunnel
Construction method.
Background technology
With the development and the acceleration of Urbanization Construction of national economy, domestic city subway transportation development is also increasingly
Rapidly.In subway transportation construction, the earth bulgings such as Tunnel Passing existing building, road, water channel can be frequently encountered, also included
The underground such as sewer, box culvert, pipeline of underground obstacle, such section often influences Tunnel Construction Schedule and construction safety, herein
The sedimentation in tunnel coverage should be controlled during class section construction tunnel, ensures that engineering security in itself and progress are suitable again
Profit, thus it is very necessary using corresponding reply technology to different situations.
Box culvert is common drainage arrangement in urban underground construction, during shallow-depth-excavation tunnel, run into box culvert can in advance under
Drop tunnel excavation depth, then passes through from box culvert lower safety, but this method needs big distance in advance to start to incline excavation
Tunnel increases constructing tunnel buried depth, but underground carries out construction tunnel to be limited in scope, and can not be avoided completely in shallow embedding layer
Influence of the box culvert to tunnel, not only needs excessive change construction direction, and cannot get preferable effect.
The content of the invention
The technical problems to be solved by the invention are for above-mentioned deficiency of the prior art, there is provided a kind of shallow buried covered excavation
The construction method of Tunnel Passing box culvert, its tunnel changes phase is shorter, and the cutting depth of tunnel bottom is constant, only changes
The cross sectional shape in tunnel, cleverly avoids influence of the existing box culvert to constructing tunnel.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of shallow-depth-excavation tunnel passes through box culvert
Construction method, it is characterised in that the method is comprised the following steps：
Step one, preparation of construction：
Step 101, determine box culvert position：Using radar detection box culvert and the relative position of institute's construction tunnel, the box culvert
Intersect positioned at institute construction tunnel top and with institute construction tunnel, the distance between bottom and institute's construction tunnel bottom of box culvert h1It is small
In the height h of institute's construction tunnel,
Step 102, build water protecting curtain：Building grouting curtain to institute's construction tunnel carries out waterproof；
Step 103, construction pipe canopy：
Step 103-1, the length is used to carry out rest to the box culvert for the pipe canopy of L, institute's construction tunnel side is parallel etc.
Spacing is laid with N number of pipe canopy, and N >=5, the outer limb between the pipe canopy and institute's construction tunnel is α, the height and case of pipe canopy of constructing
Contain the height h of bottom1Equal, the opposite side of institute's construction tunnel is provided with the M pipe canopy of parallel equidistant laying, M=N and M
Individual pipe canopy is symmetrically laid with N number of pipe canopy along tunnel axis, wherein, the length of pipe canopyL3It is institute's construction tunnel
The distance between the position terminated of ending section and box culvert, L1The distance between original position and box culvert for pipe canopy, d is box culvert
Width；
Step 103-2, the pipe canopy to being set in step 103-1 carry out grouting and reinforcing；
Step 2, preparation section construction：Preparation section to institute's construction tunnel carries out water-stop curtain slip casting, and in earth's surface construction
Rotary churning pile carries out consolidation reinforcing to the soil body, and the preparation section is constructed using the upper CD methods of getting out of a predicament or an embarrassing situation, right while driving
The preparation section of institute's construction tunnel carries out consolidation process and sets steelframe, and slip casting is manually opened to arch both sides after steelframe closure cyclization
Eye carries out ejection for water plugging；
Step 3, the size for determining box culvert section：
Step 301, the height for determining box culvert section：The height h of the box culvert section3=h1-Δh1, wherein, Δ h1It is case
Contain the foundation thickness of bottom, the changing value Δ H that the sagging changeover portion of institute's construction tunnel often tunnels one meter of its height is：The height h of the box culvert section3Subtract the traffic safety area more than train in tunnel after 2 Δ h
The height h in domain2, Δ h is the thickness of construction lining cutting and supporting after excavation institute construction tunnel；
Step 302, the width that box culvert section is determined based on FInite Element：Height change value Δ H according to box culvert section determines n kinds
Box culvert section tunnel width Di={ D1, D2... Dj... Dn},DjIt is the corresponding tunnel width of jth kind box culvert section, wherein, j=1,
2 ..., n }, and by the corresponding tunnel width D of actual size jth kind box culvert sectionjCollate the minutes；
Step 302-1, set up FEM model：First pass through to actual landform and the prospecting of geological condition and record related
Geological model is built at the beginning of data, then according to the tunnel width D of the n kinds box culvert section for determiningiOn the geological model set up
Open up simulation tunnel, geological model open up a simulation tunnel and with corresponding box culvert section tunnel width Dj
It is corresponding, the preliminary bracing layer and equal densities of same thickness and the anchor pole of outer limb are respectively provided with the n simulation tunnel,
Obtain the n geometrical model set up；
Step 302-2, setting model parameter：The n geometrical model integrating tunnel set up according to step 302-1 it is specific
Situation carries out identical mode treatment to model respectively, sets identical to geometrical model according to the result reconnoitred in step 302-1
Material parameter, the comparing of the restraint condition according to geometrical model and the actual landform set up in step 302-1 is to geometrical model
Addition identical boundary constraint, the n FEM model for having been set；
Step 302-3, analysis finite element model：According to n set in step 302-2 having with material parameter
Limit meta-model, first lays the seed of equal number, and select 3 D stereo list according to the seed laid to the FEM model
The grid of element type carries out grid division treatment to model, and sets identical analysis step, then to well-established finite element
Model is analyzed, and the result of analysis generates the form of chart；
Step 302-4, finishing analysis result simultaneously determine box culvert section width：By to the FEM model in step 302-3
Analysis result arrangement and collection extract the strain and stress of simulation tunnel, and select the minimum finite element mould of strain and stress
Be converted into the width of the simulation tunnel of the minimum FEM model of the strain and stress specifically as optimal models by type
The width of box culvert section；
Step 4, sagging Construction of Transition Section：
Surrounding rock consolidation when step 401, the sagging changeover portion of construction：When carrying out sagging Construction of Transition Section, to the construction tunnel
Road carries out water-stop curtain slip casting, and carries out consolidation reinforcing to the soil body in earth's surface construction rotary churning pile；
Step 402, the sagging changeover portion to tunnel are excavated:The tunneling method of sagging changeover portion is got out of a predicament or an embarrassing situation for upper CD
Method, vault is reduced to the design height of box culvert section in step 3 according to difference in height equal difference, abutment wall equidistantly broadened according to diameter difference to
The design width of box culvert section in step 3, but tunnel bottom relative position keeps constant, during the sagging changeover portion of construction, in driving
Simultaneously will to the sagging changeover portion, construction tunnel carries out consolidation process and sets steelframe, steelframe closure cyclization after to arch
Manually open slip casting eye and carry out ejection for water plugging in both sides；
Step 403, the test point that sagging changeover portion is set：What the sagging changeover portion original position and end position were installed
Steelframe is provided with settlement detecting device for measuring and recording tunnel vault settling data and for measuring and recording tunnel
Abutment wall restrains the convergence detection device of data；
The supporting intensity of the sagging changeover portion of step 404, initial survey：After completing to the excavation of sagging changeover portion, under reading
Settlement detecting device and the reading of convergence detection device that vertical changeover portion starting position and end position are installed, if sagging changeover portion
Sedimentation and convergence exceed safe range it is necessary to carry out safety inspection and support reinforcement to sagging changeover portion, if the sagging transition of institute
Section sedimentation and be converged in safe range, then terminate the construction of the sagging changeover portion；
Step 5, box culvert section construction：
Surrounding rock consolidation when step 501, construction box culvert section：Inwall to box culvert section construction tunnel carries out doubling to reinforce, arch
Top and abutment wall set double-deck advance support, and the grouting reinforcement soil body is carried out in the bottom stratum increase grouting amount of box culvert；
Step 502, the box culvert section to tunnel are excavated:The tunneling method of box culvert section is CRD methods, during construction box culvert section,
Driving while will to box culvert section construction tunnel carry out consolidation process and steelframe be set, steelframe closure cyclization after to arch
Manually open slip casting eye and carry out ejection for water plugging in both sides；
Step 503, the test point that box culvert section is set：The steelframe that the box culvert section centre position and end position are installed is all provided with
It is equipped with the settlement detecting device for measuring and recording tunnel vault settling data and for measuring and recording tunnel side wall convergence
The convergence detection device of data；
The supporting intensity of step 504, initial survey box culvert section：After completing the excavation to box culvert section, sagging changeover portion is read
End position and box culvert section centre position and end position install settlement detecting device and convergence detection device reading
Number, if the sedimentation and convergence of box culvert section exceed safe range it is necessary to carry out safety inspection and support reinforcement to box culvert section, if box culvert
Section sedimentation and be converged in safe range, then terminate box culvert section construction；
Step 6, on choose Construction of Transition Section：
Surrounding rock consolidation during changeover portion is chosen in step 601, construction：When carrying out choosing Construction of Transition Section, to the construction tunnel
Road carries out water-stop curtain slip casting, and carries out consolidation reinforcing to the soil body in earth's surface construction rotary churning pile；
Step 602, excavated to choosing changeover portion on tunnel:On choose the tunneling method of changeover portion for upper CD gets out of a predicament or an embarrassing situation
Method, vault is increased to the height of institute's construction tunnel normal reach according to difference in height equal difference, and abutment wall equidistantly narrows to institute according to diameter difference
The width of construction tunnel normal reach, but tunnel bottom relative position keeps constant, when choosing changeover portion in construction, while driving
Will to choosing changeover portion on described, construction tunnel carries out consolidation process and sets steelframe, to arch both sides after steelframe closure cyclization
Artificial slip casting eye of opening carries out ejection for water plugging；
The test point of changeover portion is chosen in step 603, setting：The steelframe that the installation of changeover portion end position is chosen on described is provided with
For measure and record tunnel vault settling data settlement detecting device and for measure and record tunnel side wall convergence data
Convergence detection device；
The supporting intensity of changeover portion is chosen on step 604, initial survey：After completing to above choosing the excavation of changeover portion, case is read
Settlement detecting device and the reading of convergence detection device that the end position for containing section and the end position for above choosing changeover portion are installed, if
On choose changeover portion sedimentation and convergence exceed safe range, safety inspection and support reinforcement will be carried out to above choosing changeover portion, if
On choose the sedimentation of changeover portion and be converged in safe range, then terminate on choose the construction of changeover portion；
Step 7, ending section construction：Ending section to institute's construction tunnel carries out water-stop curtain slip casting, and in earth's surface construction
Rotary churning pile carries out consolidation reinforcing to the soil body, and the ending section is constructed using the upper CD methods of getting out of a predicament or an embarrassing situation, right while driving
The construction tunnel of the section that finishes up carries out consolidation process and sets steelframe, and slip casting is manually opened to arch both sides after steelframe closure cyclization
Eye carries out ejection for water plugging, when tunnel piercing is to apart from box culvert position L3Position when, terminate ending section construction；
Step 8, inspection pass through the supporting intensity of box culvert totality construction tunnel section：
After the section that finished up in step 7 construction terminates, suspension of works reads all sedimentation detection dresses after waiting for a period of time
The data with convergence detection device are put, judges whether numerical value meets intensity requirement, tunneling is entered if meeting the requirements
Row tunnel inner wall carries out lining construction, needs to carry out safe investigation and reinforcing to tunneling if undesirable, directly
To meeting the requirements；
Step 9, the normal excavation for recovering institute's construction tunnel：Box culvert construct completion is passed through, recovers the normal construction in tunnel.
A kind of above-mentioned shallow-depth-excavation tunnel passes through the construction method of box culvert, it is characterised in that：The upper CD gets out of a predicament or an embarrassing situation method
Construction procedure it is as follows：
Step a, excavate upper strata on the left of I and steelframe is installed：First, advanced tubule is set simultaneously in arch and median septum
Slip casting, then, excavates I and remaining core soil in advance, and after excavation, I to tunnel excavation carries out just spray concrete, installation bar-mat reinforcement, peace
The steelframe of dress vault and abutment wall, abutment wall sets mortar anchor tube and installs median septum and interim inverted arch, finally sets lock pin anchor tube, arch
Portion's built-in slip casting pipe and slip casting, spray concrete to design thickness；
Step b, excavate upper strata on the right side of II and steelframe is installed：First, advanced tubule and slip casting are set in arch, so
Afterwards, delay I and excavate II and remaining core soil in advance, after excavation, II of tunnel excavation is carried out just spray concrete, install bar-mat reinforcement,
The steelframe of vault and abutment wall is installed, abutment wall sets mortar anchor tube and installs median septum and interim inverted arch, finally sets lock pin anchor tube,
Arch built-in slip casting pipe and slip casting, spray concrete to design thickness；
Step c, excavate lower floor III simultaneously install steelframe：First, delay II and excavate III and remaining core soil in advance, excavate
Afterwards, III to tunnel excavation carries out just spray concrete, the steelframe installed bar-mat reinforcement, install abutment wall, the mortar anchor of abutment wall of then constructing
Pipe, spray concrete to design thickness；
Step d, closure cyclization：First, tunnel bottom is excavated, the tunnel bottom after excavation to tunnel excavation carries out just spray concrete, installation steel
Muscle net, installation steelframe, then spray concrete to design thickness, tunnel support closure cyclization.
A kind of above-mentioned shallow-depth-excavation tunnel passes through the construction method of box culvert, it is characterised in that：In the step 103-1
The original position of the pipe canopy is with box culvert position apart from L1=9m~11m.
A kind of above-mentioned shallow-depth-excavation tunnel passes through the construction method of box culvert, it is characterised in that：In the step 103-1
Outer limb α=20 ° of pipe canopy and tunnel, set location of the two neighboring pipe canopy in tunnel wall is at intervals of 20cm~30cm.
A kind of above-mentioned shallow-depth-excavation tunnel passes through the construction method of box culvert, it is characterised in that：The ending section stop bits
Put with box culvert apart from L3Equal to the pipe canopy original position and box culvert apart from L1, take L1=L3=10m.
A kind of above-mentioned shallow-depth-excavation tunnel passes through the construction method of box culvert, it is characterised in that：The sagging changeover portion, case
Contain section and it is described on choose between the bow member and bow member that bow member and the distance between bow member of changeover portion setting set less than normal reach
Distance.
The present invention has advantages below compared with prior art：
1st, the present invention by set sagging changeover portion and on choose changeover portion, the wide of the tunnel of normal reach and height are gradually changed
The orographic condition for adapting to box culvert bottom, pass through box culvert construct safely on the premise of the direction of tunnel line is not changed, cleverly
Avoid influence of the box culvert to constructing tunnel.
2nd, the present invention is had by using limited element analysis technique to the cross dimensions that institute's construction tunnel Varied section is constructed
Finite element analysis, the anti-settling and convergent ability in tunnel can be also increased using the size and dimension of optimal case.
3rd, it is of the invention by setting settlement detecting device and convergence detection device, to the sedimentation situation holed and convergence
Situation real-time detection, once more than the settling amount and amount of convergence of safety standard requirement, just to stop construction and part of having constructed is entered
Row safety investigation, greatly avoids the generation of danger.
4th, the present invention is by setting intensive bow member, double reinforcing, it is ensured that can be provided enough when box culvert section is constructed
The supporting of intensity and safe enough, it is ensured that construction speed and construction safety.
In sum, tunnel changes phase of the present invention is shorter, and the cutting depth of tunnel bottom is constant, only changes tunnel
The cross sectional shape in road, cleverly avoids influence of the existing box culvert to constructing tunnel, on the premise of construction safety is ensured, it is ensured that
Construction speed.
Below by drawings and Examples, technical scheme is described in further detail.
Brief description of the drawings
Fig. 1 is system flow chart of the invention.
Fig. 2 is pipe canopy supportive structure schematic diagram of the invention.
Fig. 3 is structural representation of the invention.
Fig. 4 is that upper CD of the invention gets out of a predicament or an embarrassing situation the flow chart of method.
Fig. 5 is the structural representation in box culvert section tunnel section of the invention and normal tunnel section.
Fig. 6 is that upper CD of the invention gets out of a predicament or an embarrassing situation the structural representation of method.
Fig. 7 is the installation position schematic diagram of settlement monitoring point of the invention and convergence point on bow member.
Fig. 8 is box culvert of the invention section tunnel finite element model analysis figure.
Description of reference numerals:
1-box culvert；2-sagging changeover portion；3-above choose changeover portion；
4-box culvert section；5-pipe canopy；6-normal reach；
7-advanced tubule；8-mortar anchor tube；9-lock pin anchor tube；
10-interim inverted arch；11-steelframe；12-median septum；
13-settlement detecting device；14-convergence detection device；15-Grouting Pipe；
16-prepare section；17-ending section.
Specific embodiment
A kind of shallow-depth-excavation tunnel passes through the construction method of box culvert, and the method is comprised the following steps：
Step one, preparation of construction：
Step 101, determine box culvert position：Using radar detection box culvert 1 and the relative position of institute's construction tunnel, the box culvert
1 is located at institute construction tunnel top and intersect with institute construction tunnel, the distance between bottom and institute's construction tunnel bottom of box culvert 1 h1
Less than the height h of institute's construction tunnel,
As shown in Figures 2 and 3, it is necessary to explanation be box culvert 1 bottom and institute's construction tunnel bottom apart from h1Less than institute
The height h of institute's construction tunnel is stated, the highly too low of box culvert 1 is illustrated, the original plan construction of institute's construction tunnel, the box culvert is had influence on
The height h of section 43Subtract the height h more than the traffic safety region of train in tunnel after 2 Δ h2, the back-up coat in the tunnel and
The Δ h of lining thickness 2 includes the lining cutting of vault and lining cutting and the supporting Δ h of supporting Δ h and inverted arch, shows in tunnel box culvert section 4
Interior train can keep normally travel and have certain safe distance with tunnel wall, in a word, the position of the box culvert 1 with constructed
The distance of tunnel bottom is not only smaller than the height of institute's construction tunnel, and to ensure that the tunnel after box culvert 4 lining cutting of section ensure that
The normally travel of train, the bottom level for whole section of institute's construction tunnel is indeclinable, when box culvert 1 is passed through, only need to be to institute
The spring of arch and both sides width of construction tunnel are adjusted, and need the height h of the box culvert section 43Subtract big after 2 Δ h
In the safe altitude h of tunnel driving2, i.e. h3＞ h2, the height h in the traffic safety region of train in the tunnel2For track is thick
The safe distance sum that degree, train height and train are advanced with tunnel vault；
Step 102, build water protecting curtain：Building grouting curtain to institute's construction tunnel carries out waterproof；
Construction tunnel buried depth is excessively shallow, is influenceed larger by surface water, and near box culvert 1, box culvert 1 easily occurs leak infiltration in tunnel,
Stratum water content is higher, and institute's construction tunnel is whole to use cement-waterglass curtain-grouting sealing, and box culvert section 4 increases grouting amount and consolidates
The knot soil body, prevents infiltration from washing away layer of sand and causes cavity, influences supporting intensity.
Step 103, construction pipe canopy：
Step 103-1, the length is used to carry out rest for 5 pairs of box culverts 1 of pipe canopy of L, institute's construction tunnel side is parallel
N number of pipe canopy 5, N >=5 are equidistantly laid with, the outer limb between the pipe canopy 5 and institute's construction tunnel is α, the height of construction pipe canopy 5
Degree and the height h of the bottom of box culvert 11Equal, the opposite side of institute's construction tunnel is provided with the M pipe canopy 5 of parallel equidistant laying,
M=N and M pipe canopy 5 is symmetrically laid with N number of pipe canopy 5 along tunnel axis, wherein, the length of pipe canopy 5L3For
The distance between the position of the end of ending section 17 of institute's construction tunnel and box culvert 1, L1For pipe canopy 5 original position and box culvert 1 it
Between distance, d for box culvert 1 width；
It should be noted that because the buried depth of box culvert 1 is excessively shallow, it is yielding that the soil is porous, having in the bottom tunneling of box culvert 1 can
Box culvert settlement can be caused serious, supporting is carried out to box culvert 1 using pipe canopy 5, reduce the settling amount of box culvert 1, it is to avoid box culvert 1 due to
Influence is produced on institute's construction tunnel from recurrence sedimentation, as shown in figure 3, the set location of pipe canopy 5 need to keep same height with box culvert 1
Degree, height error crosses the pipe canopy 5 that conference causes and cannot play due support effect, some overload of pipe canopy 5 supports, influence branch
The stability of shield, the height of construction pipe canopy 5 is 0cm~-5cm, that is, the pipe canopy constructed with the error range of the height of the bottom of box culvert 1
5 to box culvert 1 when supporting is carried out, and error allows the region of the 5cm below the bottom of box culvert 1.
Step 103-2, the pipe canopy 5 to being set in step 103-1 carry out grouting and reinforcing；
Step 2, preparation section construction：Preparation section 16 to institute's construction tunnel carries out water-stop curtain slip casting, and in ground top application
Work rotary churning pile carries out consolidation reinforcing to the soil body, and the preparation section 16 is constructed using the upper CD methods of getting out of a predicament or an embarrassing situation, while driving
Is carried out by consolidation process and steelframe 11 is set for the preparation of institute's construction tunnel section 16, to arch both sides after steelframe 11 closes cyclization
Artificial slip casting eye of opening carries out ejection for water plugging；
It should be noted that it is for stratum before and after reducing excavation that consolidation reinforcing is carried out to the soil body in earth's surface construction rotary churning pile
The influence produced to box culvert 1 is settled, the buried depth of box culvert 1 is excessively shallow, easily settles, and earth's surface soil property is more loose to be easily scattered, increased
The difficulty and danger of construction, on the ground of the both sides of box culvert 1 carry out the construction of rotary churning pile, make both sides earth's surface figure layer consolidation be one
Body, increased the intensity of soil property, it is to avoid excessive sedimentation occurs in work progress.The steelframe 11 is the step according to excavation method
Rapid progressively supporting, makes steelframe 11 close cyclization tunnel bottom excavation setting inverted arch after the completion of tunnel excavation, is closed in steelframe 11
After synthesis ring arch both sides are manually opened with slip casting eye carries out ejection for water plugging, and injecting paste material is cement-waterglass dual slurry, slip casting
For the purpose of reaching not permeable leak, just stop slip casting immediately after Zhi Wuming water, prevent slip casting to first Zhi Zaocheng loads.Such as Fig. 2 institutes
Show, the length of the preparation section 16 is the position of the box culvert 1 in the construction location and step 101 of pipe canopy 5 apart from L1Subtract down
The length L of vertical changeover portion2。
Step 3, the size for determining box culvert section：
Step 301, the height for determining box culvert section：The height h of the box culvert section 43=h1-Δh1, wherein, Δ h1For
The foundation thickness of the bottom of box culvert 1, the changing value Δ H that the sagging changeover portion 2 of institute's construction tunnel often tunnels one meter of its height is：The height h of the box culvert section 43Subtract the traffic safety more than train in tunnel after 2 Δ h
The height h in region2, Δ h is the thickness of construction lining cutting and supporting after excavation institute construction tunnel；
It should be noted that as shown in figure 3, for the height h of box culvert section 43=h1-Δh1, refer to the height of box culvert section 4
h3Equal to the height h of box culvert 11Subtract the foundation thickness Δ h of the bottom of box culvert 11, the height h of box culvert section 43By the height h of box culvert 11Certainly
It is fixed, the height h of box culvert 11, it is known that then box culvert section 4 tunnel height h3It is determined that, the bottom of box culvert section 4 is put down with the bottom of normal reach 6
Together, the height of box culvert section 4 declines and width increases, and the distance of the sagging changeover portion 2 between box culvert section 4 and normal reach 6 determines then
Height change in the sagging changeover portion 2 understands that can set 4 width of rational box culvert section according to its height change situation enters
Row analysis.
Step 302, the width that box culvert section is determined based on FInite Element：Height change value Δ H according to box culvert section determines n kinds
4 tunnel width D of box culvert sectioni={ D1, D2... Dj... Dn},DjIt is jth kind box culvert 4 corresponding tunnel widths of section, wherein, j=
{ 1,2 ..., n }, and by actual size jth kind box culvert section 4 corresponding tunnel width DjCollate the minutes；
As shown in figure 5, box culvert section 4 compares with the tunnel construction sections face of the normal construction section of institute construction tunnel, the bottom of box culvert section 4
Highly constant, tunnel height step-down, tunnel width broadens, in the present embodiment, for convenience of analysis, the width D of box culvert section 4i=D+ λ
ΔH×L2, D is the width of institute's construction tunnel normal construction, and λ is the coefficient of change width, with having arrangement from λ=60%, λ=
80%th, λ=100%, λ=120%, λ=140% 5 group of data, are analyzed according to setting identical parameter and analysis method,
Determine optimal width parameter.
Step 302-1, set up FEM model：First pass through to actual landform and the prospecting of geological condition and record related
Geological model is built at the beginning of data, then according to the tunnel width D of the n kinds box culvert section 4 for determiningiOn the geological model set up
Open up simulation tunnel, geological model open up a simulation tunnel and with corresponding box culvert 4 tunnel widths of section
DjIt is corresponding, the preliminary bracing layer and equal densities of same thickness and the anchor of outer limb are respectively provided with the n simulation tunnel
Bar, obtains the n geometrical model set up；
Geometrical model is first set up using ABAQUS softwares in the present embodiment, the method analyzed using Direct Modeling determines model
Requirement of this kind of method of stressing conditions to user it is low, understanding analysis principle directly perceived easy to use, compared to based on python
The modeling method of language is, it is necessary to have certain degree of understanding and qualification to python language, learning difficulty is higher, according to right
Actual landform and the prospecting situation of geological condition set up the country rock of simulation tunnel, and the geological model of foundation is typically using regular mould
Type, then carries out the constraint of boundary condition according to different situations to model, and mould shapes use cuboid mould in the present embodiment
Type, it is easy to set up.
Step 302-2, setting model parameter：The n geometrical model integrating tunnel set up according to step 302-1 it is specific
Situation carries out identical mode treatment to model respectively, sets identical to geometrical model according to the result reconnoitred in step 302-1
Material parameter, the comparing of the restraint condition according to geometrical model and the actual landform set up in step 302-1 is to geometrical model
Addition identical boundary constraint, the n FEM model for having been set；
Mould shapes use rectangular body Model in the present embodiment, carry out parameter setting to model each several part first, according to existing
Sampling actual measurement and be similar to the reference data of stratum engineering literature data, be country rock setting elastic modelling quantity, Poisson's ratio, interior
The parameters such as angle of friction, cohesive strength and natural density, elastic modelling quantity is set to anchor pole, to preliminary bracing layer setting elastic modelling quantity and pool
Pine ratio, then, adds corresponding load to simulate the pressure that top stratum produces, surrounding addition normal direction in geometrical model overhead surface
Constraint, top is the scope of freedom, and bottom is fixed constraint, and the tunnel being sized with shape is opened up in the simulation soil body of cuboid-type
Road, and set with grouting anchor pile, the simulation soil body of each cuboid-type opens up a tunnel, five moulds of different sizes and shapes
Intending tunnel needs to set up five models.
Step 302-3, analysis finite element model：According to n set in step 302-2 having with material parameter
Limit meta-model, first lays the seed of equal number, and select 3 D stereo list according to the seed laid to the FEM model
The grid of element type carries out grid division treatment to model, and sets identical analysis step, then to well-established finite element
Model is analyzed, and the result of analysis generates the form of chart；
As shown in figure 8, the model is the box culvert section tunnel finite element analysis model of grid division, due to only to tunnel
Size shape is changed, and to obtain optimal case, it would be desirable to control other experiment parameters constant using control variate method,
When carrying out the relevant setting of ABAQUS finite element analysis softwares to model, identical material parameter and boundary constraint need to be kept,
Setting under conditions of permission to analysis step is also as far as possible consistent, and this can ensure roughly the same analytical error, grid division
Mode also uses same way as far as possible.
Step 302-4, finishing analysis result simultaneously determine box culvert section width：By to the FEM model in step 302-3
Analysis result arrangement and collection extract the strain and stress of simulation tunnel, and select the minimum finite element mould of strain and stress
Be converted into the width of the simulation tunnel of the minimum FEM model of the strain and stress specifically as optimal models by type
The width of box culvert section 4；
After model specification is good, the n geometrical model that operation function pair is established is analyzed, the post processing mould that analysis is obtained
The running parameter of type extraction model is simultaneously made chart, and the ess-strain to five models is contrasted, and according to actual landform
Most suitable tunnel size and dimension is selected with condition of construction, and model parameter is reduced into actual construction parameter.
Step 4, sagging Construction of Transition Section：
Surrounding rock consolidation when step 401, the sagging changeover portion of construction：When carrying out the construction of sagging changeover portion 2, to the construction tunnel
Road carries out water-stop curtain slip casting, and carries out consolidation reinforcing to the soil body in earth's surface construction rotary churning pile；
Step 402, the sagging changeover portion to tunnel are excavated:The tunneling method of sagging changeover portion 2 is got out of a predicament or an embarrassing situation for upper CD
Method, vault is reduced to the design height of box culvert section 4 in step 3 according to difference in height equal difference, abutment wall equidistantly broadened according to diameter difference to
The design width of box culvert section 4 in step 3, but tunnel bottom relative position keeps constant, during the sagging changeover portion 2 of construction, in driving
While will to the sagging changeover portion 2, construction tunnel carries out consolidation process and sets steelframe 11, close cyclization in steelframe 11
Afterwards arch both sides are manually opened with slip casting eye carries out ejection for water plugging；
It should be noted that the construction method of sagging changeover portion 2 can be consistent with the construction method of normal reach 6, method one
Cause can avoid changing the cumbersome process of construction method, it is also possible to decide whether that replacing is applied according to actual geology and hydrologic regime
Work mode, in the present embodiment, the form of construction work of preferred sagging changeover portion 2 and normal reach 6 is CD and gets out of a predicament or an embarrassing situation method；Such as Fig. 3
With shown in Fig. 5, vault is reduced according to difference in height equal difference, and abutment wall equidistantly broadens according to diameter, and the height of vault is in identical tunnel
Falling head in length is the same, and the increase distance of the distance of the side wall of tunnel two in identical length of tunnel is the same
, the inner surface for this ensures that thering sagging changeover portion 2 is smooth curved surface, to arch both sides people after steelframe 11 closes cyclization
Work opens slip casting eye and carries out ejection for water plugging, and the injecting paste material for carrying out ejection for water plugging is cement-waterglass.
Step 403, the test point that sagging changeover portion is set：The original position of sagging changeover portion 2 and end position are installed
Steelframe 11 be provided with settlement detecting device 13 for measuring and recording tunnel vault settling data and for measuring and remembering
Record tunnel side wall restrains the convergence detection device 14 of data；
As shown in fig. 7, in tunnel Varied section work progress, effectively control and the sedimentation in detection tunnel and convergence is usually
The emphasis of construction, it is, in order to detect the sedimentation and deformation degree of vault, to set convergence detection device 14 to set settlement detecting device 13
It is that, in order to detect the convergent deformation degree of abutment wall, both collective effects detect the deflection in whole tunnel, tunnel is inferred with this
Supporting intensity it is whether qualified, if unqualified, it is also possible to rapidly find out where the not enough region of supporting intensity, accelerate discovery
The speed of support issues, so as to go to solve support issues, accelerates the speed of application in tunnel indirectly.
The supporting intensity of the sagging changeover portion of step 404, initial survey：After completing to the excavation of sagging changeover portion 2, under reading
Settlement detecting device 13 and the reading of convergence detection device 14 that the vertical starting position of changeover portion 2 and end position are installed, if sagging
The sedimentation and convergence of changeover portion 2 exceed safe range it is necessary to carry out safety inspection and support reinforcement to sagging changeover portion 2, if institute
The sedimentation of sagging changeover portion 2 and it is converged in safe range, then terminates the construction of the sagging changeover portion 2；
By box culvert 1 and institute's construction tunnel are respectively positioned on shallow embedding layer, geology is loose fugitive, and water content is larger, and it is heavy to be more also easy to produce
Drop, after institute's construction tunnel has constructed sagging changeover portion 2, first carries out sedimentation convergence detection to the sagging changeover portion 2, it is determined that
The supporting of sagging changeover portion 2 and reinforce it is qualified after, then carry out the construction of next tunnel construction sections, otherwise find problem and reinforced,
It should be noted that for the settlement detecting device 13 and convergence detection device 14 that have been set in tunneling, every 12 hours
Reading is once.
Step 5, box culvert section construction：
Surrounding rock consolidation when step 501, construction box culvert section：Inwall to box culvert 4 construction tunnels of section carries out doubling to reinforce, arch
Top and abutment wall set double-deck advance support, and the grouting reinforcement soil body is carried out in the bottom stratum increase grouting amount of box culvert 1；
As shown in figure 3, box culvert section 4 is located at immediately below box culvert 1, maximum is influenceed by box culvert 1, so to take what is doubled to add
Gu and supporting, take more firm tunneling method, doubles are taken in the present embodiment.
Step 502, the box culvert section to tunnel are excavated:The tunneling method of box culvert section 4 is CRD methods, construction box culvert section 4
When, driving while will to box culvert section 4 construction tunnel carry out consolidation process and steelframe 11 be set, close cyclization in steelframe 11
Afterwards arch both sides are manually opened with slip casting eye carries out ejection for water plugging；
Box culvert section 4 using CRD methods construct and may insure construction safety and certain speed of application, at the same time, by
The arrangement and method for construction of method of being got out of a predicament or an embarrassing situation using upper CD in sagging changeover portion 2 and normal reach 6, therefore the section 4 from sagging changeover portion 2 to box culvert
Constructing structure conversion be also it is very important, till now also without complete set bored tunnel constructing structure conversion side
Method and standard, because CRD methods and upper CD method structure of getting out of a predicament or an embarrassing situation are similar, only need to add half bar median septum 12, and CRD methods are in itself
Suitable for the constructing tunnel of soft stratum, there is good effect especially for control subsidence, be conducive to adjoining rock stability, protect
Card construction safety, summary reason, selection box culvert section 4 uses CRD method arrangement and method for construction.There is crack infiltration, box culvert 1 in box culvert 1
Bottom Tunnel after percolating water it is larger, there is larger safety to electrical equipments such as electric welding field and construction illuminations hidden
Suffer from, personnel, mechanical execution operation are inconvenient because arch infiltration is operated, so after cyclization is closed arch both sides are manually opened with slip casting eye
Carry out ejection for water plugging operation, it is preferred that injecting paste material is cement-waterglass dual slurry in the present embodiment, slip casting is not permeable to reach
For the purpose of leak, slip casting is stopped immediately after in preliminary bracing without bright water, prevent slip casting overweight to first Zhi Zaocheng loads.
Step 503, the test point that box culvert section is set：The steelframe 11 that box culvert 4 centre positions of section and end position are installed
It is provided with settlement detecting device 13 for measuring and recording tunnel vault settling data and for measuring and recording tunnel side
Wall restrains the convergence detection device 14 of data；
It should be noted that setting the purpose and mode and step of settlement detecting device 13 and convergence detection device 14 herein
Settlement detecting device 13 in 403 is identical with the setting of convergence detection device 14.
The supporting intensity of step 504, initial survey box culvert section：After completing the excavation to box culvert section 4, sagging changeover portion is read
Settlement detecting device 13 and convergence detection device that the centre position of 2 end position and box culvert section 4 and end position are installed
14 reading, if the sedimentation and convergence of box culvert section 4 exceed safe range it is necessary to carry out safety inspection and supporting adds to box culvert section 4
Gu, if box culvert section 4 sedimentation and be converged in safe range, terminate box culvert section 4 construction；
After institute's construction tunnel has constructed box culvert section 4, sedimentation convergence detection first is carried out to box culvert section 4, determine case
Contain section 4 supporting and reinforce it is qualified after, then carry out the construction of next tunnel construction sections, otherwise find problem and reinforced, it is necessary to be said
Bright was the settlement detecting device 13 and convergence detection device 14 for having been set in tunneling, every 12 hours readings one
It is secondary.
Step 6, on choose Construction of Transition Section：
Surrounding rock consolidation during changeover portion is chosen in step 601, construction：When choose the construction of changeover portion 3, to the construction tunnel
Road carries out water-stop curtain slip casting, and carries out consolidation reinforcing to the soil body in earth's surface construction rotary churning pile；
As shown in figure 3, the constructing tunnel symmetrical configuration due to passing through box culvert 1, the reinforcing mode for above choosing changeover portion 3 is also adopted by
The reinforcing mode of sagging changeover portion 2 in step 401.
Step 602, excavated to choosing changeover portion on tunnel:On choose the tunneling method of changeover portion 3 for upper CD gets out of a predicament or an embarrassing situation
Method, vault is increased to the height of institute construction tunnel normal reach 6 according to difference in height equal difference, and abutment wall equidistantly narrows to institute according to diameter difference
The width of construction tunnel normal reach 6, but tunnel bottom relative position keeps constant, when choosing changeover portion 3 in construction, in the same of driving
When will to choosing changeover portion 3 on described, construction tunnel carries out consolidation process and sets steelframe 11, it is right after steelframe 11 closes cyclization
Manually open slip casting eye and carry out ejection for water plugging in arch both sides；
Changeover portion 3 is chosen on described identical with the construction method of sagging changeover portion 2, in the present embodiment, above choose applying for changeover portion 2
Work mode is got out of a predicament or an embarrassing situation method for upper CD；As shown in Figure 3 and Figure 5, vault is raised according to difference in height equal difference, and abutment wall equidistantly becomes according to diameter
Narrow, the lifting height of the height of vault in identical length of tunnel is the same, and the distance of the side wall of tunnel two is in identical
Reduction distance in length of tunnel is the same, and it is smooth curved surface to this ensures that there and choose the inner surface of changeover portion 3, in steel
Frame 11 closes and arch both sides are manually opened after cyclization slip casting eye and carry out ejection for water plugging, and the injecting paste material for carrying out ejection for water plugging is water
Mud-waterglass.
The test point of changeover portion is chosen in step 603, setting：The steelframe 11 that the installation of the end position of changeover portion 3 is chosen on described sets
It is equipped with the settlement detecting device 13 for measuring and recording tunnel vault settling data and is received for measuring and recording tunnel side wall
Hold back the convergence detection device 14 of data；
It should be noted that setting the purpose and mode and step of settlement detecting device 13 and convergence detection device 14 herein
Settlement detecting device 13 in 403 is identical with the setting of convergence detection device 14.
The supporting intensity of changeover portion is chosen on step 604, initial survey：Complete to after the excavation for above choosing changeover portion 3, reading case
The settlement detecting device 13 and convergence detection device 14 of the end position for containing section 4 and the end position installation for above choosing changeover portion 3
Reading, if on choose changeover portion 3 sedimentation and convergence exceed safe range, safety inspection and branch will be carried out to above choosing changeover portion 3
Shield is reinforced, if on choose the sedimentation of changeover portion 3 and be converged in safe range, terminate on choose the construction of changeover portion 3；
After choosing changeover portion 3 on institute's construction tunnel has constructed case, first sedimentation convergence inspection is carried out to choosing changeover portion 3 on described
Survey, it is determined that on choose changeover portion 3 supporting and reinforce it is qualified after, then carry out the construction of next tunnel construction sections, otherwise find problem and go forward side by side
Row is reinforced, it is necessary to explanation is settlement detecting device 13 and convergence detection device 14 for having been set in tunneling, often
Every 12 hours readings once.
Step 7, ending section construction：Ending section 17 to institute's construction tunnel carries out water-stop curtain slip casting, and in ground top application
Work rotary churning pile carries out consolidation reinforcing to the soil body, and the ending section 17 is constructed using the upper CD methods of getting out of a predicament or an embarrassing situation, while driving
Is carried out by consolidation process and steelframe 11 is set for the construction tunnel of the section 17 that finishes up, to arch both sides after steelframe 11 closes cyclization
Artificial slip casting eye of opening carries out ejection for water plugging, when tunnel piercing is to apart from the position L of box culvert 13Position when, terminate ending section 17 apply
Work；
Chosen after 3 sections of changeover portion terminates by institute's construction tunnel is excavated to, the influence model of box culvert 1 is not completely disengaged from also
Enclose, so being provided with ending section 17, the reinforcing of the ending section 17 for the preparation 16 identical purposes of section passed through before box culvert 1
Mode and digging mode are identical with the reinforcing mode and digging mode for preparing section 16.
Step 8, inspection pass through the supporting intensity of box culvert totality construction tunnel section：
After the section 17 that finished up in step 7 construction terminates, suspension of works reads all sedimentation detections after waiting for a period of time
The data of device 13 and convergence detection device 14, judge whether numerical value meets intensity requirement, to having excavated if meeting the requirements
Tunnel carries out tunnel inner wall and carries out lining construction, needs to carry out tunneling safe investigation if undesirable and adds
Gu, untill meeting the requirements；
Construction must carry out supporting intensity detection after finishing to the section of construction tunnel, it is ensured that the security of tunneling,
If supporting is unqualified will check tunneling in time, find the problem and process process problem in time, make
Tunnel support structure intensity is qualified, can just carry out next step step.
Step 9, the normal excavation for recovering institute's construction tunnel：Box culvert construct completion is passed through, recovers the normal construction in tunnel.
In the present embodiment, as shown in Figure 4 and Figure 6, the upper CD get out of a predicament or an embarrassing situation method construction procedure it is as follows：
Step a, excavate upper strata on the left of I and steelframe is installed：First, advanced tubule is set in arch and median septum 12
7 and slip castings, then, excavate I and remaining core soil in advance, after excavation, I of tunnel excavation is carried out just spray concrete, install bar-mat reinforcement,
The steelframe 11 of vault and abutment wall is installed, abutment wall sets mortar anchor tube 8 and installs median septum 12 and interim inverted arch 10, finally sets lock
Pin anchor tube 9, arch built-in slip casting pipe 15 and slip casting, spray concrete to design thickness；
Step b, excavate upper strata on the right side of II and steelframe is installed：First, advanced tubule 7 and slip casting are set in arch,
Then, delay I and excavate II and remaining core soil in advance, after excavation, II to tunnel excavation carries out just spray concrete, installation reinforcing bar
Net, the steelframe 11 for installing vault and abutment wall, abutment wall set mortar anchor tube 8 and install median septum 12 and interim inverted arch 10, finally set
Put lock pin anchor tube 9, arch built-in slip casting pipe 15 and slip casting, spray concrete to design thickness；
Step c, excavate lower floor III simultaneously install steelframe：First, delay II and excavate III and remaining core soil in advance, excavate
Afterwards, III to tunnel excavation carries out just spray concrete, the steelframe 11 installed bar-mat reinforcement, install abutment wall, the mortar of abutment wall of then constructing
Anchor tube 8, spray concrete to design thickness；
Step d, closure cyclization：First, tunnel bottom is excavated, the tunnel bottom after excavation to tunnel excavation carries out just spray concrete, installation steel
Muscle net, installation steelframe 11, then spray concrete to design thickness, tunnel support closure cyclization.
It should be noted that in the present embodiment, a Pin, described I, II and III are often circulated in tunnel excavating process
Core Soil be 2m, described II is delayed I 3m, and described III is delayed II 5m, and upper CD gets out of a predicament or an embarrassing situation the applying of method
Work scheme simplifies construction procedure, the tunnel closing cyclic time is shortened, to control tunnel while Tunnel Construction Schedule is accelerated
Road sedimentation and deformation is also an effective measures, and the advanced tubule 7 is arranged on along the circular arc portion of 180 ° of vault, described advanced
Ductule 7 is arranged in median septum 12, and the outer limb that the advanced tubule 7 is arranged on vault and median septum 12 is 18 °.
In the present embodiment, the original position of the pipe canopy 5 in the step 103-1 is with box culvert position apart from L1=9m
~11m.
The position that the pipe canopy 5 is set can produce the marginal position of influence, the geological hydrology bar according to soil layer for box culvert 1
Part determines that institute's construction tunnel and box culvert 1 are in shallow embedding layer in the present embodiment, so using L1=9m~11m.
In the present embodiment, outer limb α=20 ° of pipe canopy 5 and tunnel in the step 103-1, two neighboring pipe canopy 5 exists
Set location in tunnel wall is at intervals of 20cm~30cm.
Pipe shed method is generally used for the softer fugitive soil condition in stratum, is also applied for the situation of shallow buried covered excavation, but at this
In embodiment, pipe canopy is using a diameter ofSteel tube shed, the outer limb of steel tube shed is generally 1 °~3 °, due to pipe canopy 5
This with supporting box culvert 1, be to expand supporting scope, it is to avoid the overweight supporting scope mistake of box culvert 1 so outer limb is larger
Small and the excavation in tunnel is impacted, the quantity of pipe canopy depends on soil condition, and in the present embodiment, the quantity of pipe canopy is 5.
In the present embodiment, the ending section end position is with box culvert 1 apart from L3Equal to the pipe canopy 5 original position with
Box culvert 1 apart from L1, take L1=L3=10m.
It should be noted that ending section end position and the box culvert 1 apart from L3The setting pipe canopy 5 can be not equal to
Position and box culvert 1 apart from L1, in the present embodiment, calculate for convenience also for the earth formation phase for making the both sides of box culvert 1
When, make the earth formation for passing through box culvert 1 more stable, take L1=L3=10m.
In the present embodiment, the sagging changeover portion 2, box culvert section 4 and it is described on choose the setting of changeover portion 3 bow member and bow member it
Between distance less than the distance between bow member and bow member that normal reach 6 is set.
Due to normal reach 6 to box culvert section 4 transition during, tunnel broadens, and the soil pressure born is bigger, so should be appropriate
Shorten the distance per Pin steelframes 11, so as to reach the purpose of enhancing tunnel support intensity.
The above, is only presently preferred embodiments of the present invention, and not the present invention is imposed any restrictions, every according to the present invention
Any simple modification, change and equivalent structure change that technical spirit is made to above example, still fall within skill of the present invention
In the protection domain of art scheme.
Claims (6)
1. a kind of shallow-depth-excavation tunnel passes through the construction method of box culvert, it is characterised in that the method is comprised the following steps：
Step one, preparation of construction：
Step 101, determine box culvert position：Use radar detection box culvert (1) and the relative position of institute's construction tunnel, the box culvert
(1) intersect positioned at institute construction tunnel top and with institute construction tunnel, between the bottom and institute's construction tunnel bottom of box culvert (1) away from
From h1Less than the height h of institute's construction tunnel,
Step 102, build water protecting curtain：Building grouting curtain to institute's construction tunnel carries out waterproof；
Step 103, construction pipe canopy：
Step 103-1, the length is used to carry out rest to the box culvert (1) for the pipe canopy (5) of L, institute's construction tunnel side is parallel
N number of pipe canopy (5) is equidistantly laid with, N >=5, the outer limb between the pipe canopy (5) and institute's construction tunnel is α, pipe canopy of constructing
(5) height and the height h of box culvert (1) bottom1Equal, the opposite side of institute's construction tunnel is provided with M parallel equidistant cloth
If pipe canopy (5), M=N and M pipe canopy (5) is symmetrically laid with N number of pipe canopy (5) along tunnel axis, wherein, the length of pipe canopy (5)L3The distance between the position terminated for ending section (17) of institute's construction tunnel and box culvert (1), L1It is pipe
The distance between original position and box culvert (1) of canopy (5), d are the width of box culvert (1)；
Step 103-2, the pipe canopy (5) to being set in step 103-1 carry out grouting and reinforcing；
Step 2, preparation section construction：Preparation section (16) to institute's construction tunnel carries out water-stop curtain slip casting, and in earth's surface construction
Rotary churning pile carries out consolidation reinforcing to the soil body, and preparation section (16) is constructed using the upper CD methods of getting out of a predicament or an embarrassing situation, while driving
Is carried out by consolidation process and steelframe (11) is set for the preparation of institute's construction tunnel section (16), to arch after steelframe (11) closure cyclization
Manually open slip casting eye and carry out ejection for water plugging in portion both sides；
Step 3, the size for determining box culvert section：
Step 301, the height for determining box culvert section：The height h of box culvert section (4)3=h1-Δh1, wherein, Δ h1It is box culvert
(1) foundation thickness of bottom, the changing value Δ H that the sagging changeover portion (2) of institute's construction tunnel often tunnels one meter of its height is：The height h of box culvert section (4)3Subtract the driving peace more than train in tunnel after 2 Δ h
Region-wide height h2, Δ h is the thickness of construction lining cutting and supporting after excavation institute construction tunnel；
Step 302, the width that box culvert section is determined based on FInite Element：Height change value Δ H according to box culvert section determines n kind box culverts
Section (4) tunnel width Di={ D1, D2... Dj... Dn},DjIt is the corresponding tunnel width of jth kind box culvert section (4), wherein, j=
{ 1,2 ..., n }, and by actual size jth kind box culvert section (4) corresponding tunnel width DjCollate the minutes；
Step 302-1, set up FEM model：First pass through the prospecting to actual landform and geological condition and record related data
Geological model just is built, then according to the tunnel width D of n kinds box culvert section (4) for determiningiOpened on the geological model set up
If simulation tunnel, geological model open up a simulation tunnel and with corresponding box culvert section (4) tunnel width
DjIt is corresponding, the preliminary bracing layer and equal densities of same thickness and the anchor of outer limb are respectively provided with the n simulation tunnel
Bar, obtains the n geometrical model set up；
Step 302-2, setting model parameter：According to the n concrete condition of geometrical model integrating tunnel that step 302-1 is set up
Identical mode treatment is carried out to model respectively, identical material is set to geometrical model according to the result reconnoitred in step 302-1
Material parameter, adds with the comparing of the restraint condition of actual landform according to the geometrical model set up in step 302-1 to geometrical model
Identical boundary constraint, the n FEM model for having been set；
Step 302-3, analysis finite element model：According to n set in the step 302-2 finite element with material parameter
Model, first lays the seed of equal number, and select 3 D stereo unit class according to the seed laid to the FEM model
The grid of type carries out grid division treatment to model, and sets identical analysis step, then to well-established FEM model
It is analyzed, the result of analysis generates the form of chart；
Step 302-4, finishing analysis result simultaneously determine box culvert section width：By dividing to the FEM model in step 302-3
The strain and stress of simulation tunnel is extracted in the arrangement and collection for analysing result, and selects the minimum FEM model of strain and stress to make
It is optimal models, and the width of the simulation tunnel of the minimum FEM model of the strain and stress is converted into specific box culvert
The width of section (4)；
Step 4, sagging Construction of Transition Section：
Surrounding rock consolidation when step 401, the sagging changeover portion of construction：When carrying out sagging changeover portion (2) construction, to the construction tunnel
Water-stop curtain slip casting is carried out, and consolidation reinforcing is carried out to the soil body in earth's surface construction rotary churning pile；
Step 402, the sagging changeover portion to tunnel are excavated:The tunneling method of sagging changeover portion (2) is got out of a predicament or an embarrassing situation method for upper CD,
Vault is reduced to the design height of box culvert section (4) in step 3 according to difference in height equal difference, abutment wall equidistantly broadened according to diameter difference to
The design width of box culvert section (4) in step 3, but tunnel bottom relative position keeps constant, during sagging changeover portion (2) of construction,
While driving will to the sagging changeover portion (2), construction tunnel carries out consolidation process and sets steelframe (11), in steelframe
(11) after closure cyclization arch both sides are manually opened with slip casting eye carries out ejection for water plugging；
Step 403, the test point that sagging changeover portion is set：What sagging changeover portion (2) original position and end position were installed
Steelframe (11) be provided with settlement detecting device (13) for measuring and recording tunnel vault settling data and for measuring and
Record tunnel side wall restrains the convergence detection device (14) of data；
The supporting intensity of the sagging changeover portion of step 404, initial survey：After completing to the excavation of sagging changeover portion (2), read sagging
Settlement detecting device (13) and the reading of convergence detection device (14) that changeover portion (2) starting position and end position are installed, if
The sedimentation of sagging changeover portion (2) and convergence exceed safe range it is necessary to carry out safety inspection to sagging changeover portion (2) and supporting adds
Gu, if the sedimentation of sagging changeover portion (2) and be converged in safe range, terminate the construction of the sagging changeover portion (2)；
Step 5, box culvert section construction：
Surrounding rock consolidation when step 501, construction box culvert section：Inwall to box culvert section (4) construction tunnel carries out doubling to reinforce, vault
Double-deck advance support is set with abutment wall, the grouting reinforcement soil body is carried out in the bottom stratum increase grouting amount of box culvert (1)；
Step 502, the box culvert section to tunnel are excavated:The tunneling method of box culvert section (4) is CRD methods, construction box culvert section (4)
When, driving while will to box culvert section (4) construction tunnel carry out consolidation process and steelframe (11) be set, closed in steelframe (11)
After synthesis ring arch both sides are manually opened with slip casting eye carries out ejection for water plugging；
Step 503, the test point that box culvert section is set：The steelframe (11) that box culvert section (4) centre position and end position are installed
It is provided with settlement detecting device (13) for measuring and recording tunnel vault settling data and for measuring and recording tunnel
Abutment wall restrains the convergence detection device (14) of data；
The supporting intensity of step 504, initial survey box culvert section：After completing the excavation to box culvert section (4), sagging changeover portion is read
(2) settlement detecting device (13) and convergence inspection that end position and the centre position of box culvert section (4) and end position is installed
The reading of device (14) is surveyed, if the sedimentation of box culvert section (4) and convergence exceed safe range it is necessary to carry out safety to box culvert section (4)
Check and support reinforcement, if box culvert section (4) sedimentation and be converged in safe range, terminate box culvert section (4) construction；
Step 6, on choose Construction of Transition Section：
Surrounding rock consolidation during changeover portion is chosen in step 601, construction：When choose changeover portion (3) construction, to the construction tunnel
Water-stop curtain slip casting is carried out, and consolidation reinforcing is carried out to the soil body in earth's surface construction rotary churning pile；
Step 602, excavated to choosing changeover portion on tunnel:On choose the tunneling method of changeover portion (3) for upper CD gets out of a predicament or an embarrassing situation method,
Vault is increased to the height of institute's construction tunnel normal reach (6) according to difference in height equal difference, and abutment wall equidistantly narrows to institute according to diameter difference
The width of construction tunnel normal reach (6), but tunnel bottom relative position keeps constant, when changeover portion (3) are chosen in construction, in driving
While will to choosing changeover portion (3) on described, construction tunnel carries out consolidation process and sets steelframe (11), closed in steelframe (11)
After synthesis ring arch both sides are manually opened with slip casting eye carries out ejection for water plugging；
The test point of changeover portion is chosen in step 603, setting：The steelframe (11) that the installation of changeover portion (3) end position is chosen on described sets
It is equipped with settlement detecting device (13) for measuring and recording tunnel vault settling data and for measuring and recording tunnel side wall
Restrain the convergence detection device (14) of data；
The supporting intensity of changeover portion is chosen on step 604, initial survey：Complete to after the excavation for above choosing changeover portion (3), reading box culvert
Section (4) end position and above choose changeover portion (3) end position installation settlement detecting device (13) and convergence detection device
(14) reading, if on choose changeover portion (3) sedimentation and convergence exceed safe range, will pacify to above choosing changeover portion (3)
Total inspection and support reinforcement, if on choose the sedimentation of changeover portion (3) and be converged in safe range, terminate on choose changeover portion (3)
Construction；
Step 7, ending section construction：Ending section (17) to institute's construction tunnel carries out water-stop curtain slip casting, and in earth's surface construction
Rotary churning pile carries out consolidation reinforcing to the soil body, and ending section (17) is constructed using the upper CD methods of getting out of a predicament or an embarrassing situation, while driving
Is carried out by consolidation process and steelframe (11) is set for the construction tunnel of ending section (17), to arch after steelframe (11) closure cyclization
Portion both sides are manually opened slip casting eye and carry out ejection for water plugging, when tunnel piercing is to apart from box culvert (1) position L3Position when, terminate ending
Section (17) construction；
Step 8, inspection pass through the supporting intensity of box culvert totality construction tunnel section：
After the section (17) that finished up in step 7 construction terminates, suspension of works reads all sedimentation detection dresses after waiting for a period of time
The data of (13) and convergence detection device (14) are put, judges whether numerical value meets intensity requirement, to having opened if meeting the requirements
Holing carries out tunnel inner wall and carries out lining construction, need to carry out tunneling if undesirable safety investigation and
Reinforce, untill meeting the requirements；
Step 9, the normal excavation for recovering institute's construction tunnel：Box culvert construct completion is passed through, recovers the normal construction in tunnel.
2. the construction method of box culvert is passed through according to a kind of shallow-depth-excavation tunnel described in claim 1, it is characterised in that：On described
CD get out of a predicament or an embarrassing situation method construction procedure it is as follows：
Step a, excavate upper strata on the left of I and steelframe is installed：First, advanced tubule is set in arch and median septum (12)
(7) I and remaining core soil in advance and slip casting, then, are excavated, after excavation, I of tunnel excavation is carried out just spray concrete, reinforcing bar is installed
Net, the steelframe (11) for installing vault and abutment wall, abutment wall set mortar anchor tube (8) and install median septum (12) and interim inverted arch
(10), lock pin anchor tube (9), arch built-in slip casting pipe (15) and slip casting, spray concrete to design thickness are finally set；
Step b, excavate upper strata on the right side of II and steelframe is installed：First, advanced tubule (7) and slip casting are set in arch, so
Afterwards, delay I and excavate II and remaining core soil in advance, after excavation, II of tunnel excavation is carried out just spray concrete, install bar-mat reinforcement,
The steelframe (11) of vault and abutment wall is installed, abutment wall sets mortar anchor tube (8) and installs median septum (12) and interim inverted arch (10), most
Lock pin anchor tube (9), arch built-in slip casting pipe (15) and slip casting, spray concrete to design thickness are set afterwards；
Step c, excavate lower floor III simultaneously install steelframe：First, delay II and excavate III and remaining core soil in advance, after excavation,
III to tunnel excavation carries out just spray concrete, the steelframe (11) installed bar-mat reinforcement, install abutment wall, the mortar anchor of abutment wall of then constructing
Pipe (8), spray concrete to design thickness；
Step d, closure cyclization：First, excavate tunnel bottom, the tunnel bottom of tunnel excavation carried out after excavation just spray concrete, install bar-mat reinforcement,
Steelframe (11) is installed, concrete to design thickness, tunnel support closure cyclization is then sprayed.
3. the construction method of box culvert is passed through according to a kind of shallow-depth-excavation tunnel described in claim 1, it is characterised in that：The step
The original position of the pipe canopy (5) in rapid 103-1 is with box culvert position apart from L1=9m~11m.
4. the construction method of box culvert is passed through according to a kind of shallow-depth-excavation tunnel described in claim 1, it is characterised in that：The step
Between outer limb α=20 ° of pipe canopy (5) and tunnel in rapid 103-1, set location of the two neighboring pipe canopy (5) in tunnel wall
It is divided into 20cm~30cm.
5. the construction method of box culvert is passed through according to a kind of shallow-depth-excavation tunnel described in claim 1, it is characterised in that：The receipts
Rear end position is with box culvert (1) apart from L3Equal to the pipe canopy (5) original position and box culvert (1) apart from L1, take L1=
L3=10m.
6. the construction method of box culvert is passed through according to a kind of shallow-depth-excavation tunnel described in claim 1, it is characterised in that：Under described
Hang down changeover portion (2), box culvert section (4) and it is described on choose bow member and the distance between bow member of changeover portion (3) setting and be less than normal reach
(6) the distance between bow member and bow member for setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710059413.0A CN106761779B (en) | 2017-01-24 | 2017-01-24 | A kind of shallow-depth-excavation tunnel passes through the construction method of box culvert |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710059413.0A CN106761779B (en) | 2017-01-24 | 2017-01-24 | A kind of shallow-depth-excavation tunnel passes through the construction method of box culvert |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106761779A true CN106761779A (en) | 2017-05-31 |
| CN106761779B CN106761779B (en) | 2019-02-15 |
Family
ID=58943304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710059413.0A Active CN106761779B (en) | 2017-01-24 | 2017-01-24 | A kind of shallow-depth-excavation tunnel passes through the construction method of box culvert |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106761779B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107818200A (en) * | 2017-09-28 | 2018-03-20 | 中南大学 | Advanced tubule steel arch frame lock foot anchoring stock integration mechanics design methods and its model |
| CN109812271A (en) * | 2019-01-25 | 2019-05-28 | 中铁十一局集团城市轨道工程有限公司 | A kind of shield crosses the construction method for invading limit box culvert |
| CN110219256A (en) * | 2019-06-17 | 2019-09-10 | 中建六局土木工程有限公司 | A kind of channel complexity Construction of Supporting method for passing through box culvert |
| CN110409496A (en) * | 2019-08-01 | 2019-11-05 | 中铁第四勘察设计院集团有限公司 | Intermediate box culvert structure size determines method |
| CN114320342A (en) * | 2021-12-10 | 2022-04-12 | 力信测量(上海)有限公司 | Installation method and system of arc-shaped box culvert in tunnel |
| CN117433488A (en) * | 2023-12-20 | 2024-01-23 | 北京城建集团有限责任公司 | Building high formwork state monitoring architecture system and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010217017A (en) * | 2009-03-17 | 2010-09-30 | Sooki:Kk | Method for execution of tunnel excavation construction using three-dimensional laser scanner |
| CN103334761A (en) * | 2013-06-28 | 2013-10-02 | 中国一冶集团有限公司 | Method of constructing shallow tunnel underground passage variable-cross section cross mid-partition wall |
| CN103939106A (en) * | 2014-04-03 | 2014-07-23 | 北京交科公路勘察设计研究院有限公司 | Construction method for converting two side-wall pilot tunnel method to CRD method |
| CN104373128A (en) * | 2014-09-18 | 2015-02-25 | 中国路桥工程有限责任公司 | Advance precipitation construction method of oversized-section double-side lower pilot tunnels of water-rich tunnel |
| CN104500077A (en) * | 2014-12-10 | 2015-04-08 | 中铁二十局集团有限公司 | Construction method for enabling shallowly buried and darkly excavated tunnel to pass through cottage area |
| CN104631475A (en) * | 2015-01-20 | 2015-05-20 | 中铁隧道集团有限公司杭州公司 | Safe and fast construction method of down-traversing river shallow depth bored tunnel |
-
2017
- 2017-01-24 CN CN201710059413.0A patent/CN106761779B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010217017A (en) * | 2009-03-17 | 2010-09-30 | Sooki:Kk | Method for execution of tunnel excavation construction using three-dimensional laser scanner |
| CN103334761A (en) * | 2013-06-28 | 2013-10-02 | 中国一冶集团有限公司 | Method of constructing shallow tunnel underground passage variable-cross section cross mid-partition wall |
| CN103939106A (en) * | 2014-04-03 | 2014-07-23 | 北京交科公路勘察设计研究院有限公司 | Construction method for converting two side-wall pilot tunnel method to CRD method |
| CN104373128A (en) * | 2014-09-18 | 2015-02-25 | 中国路桥工程有限责任公司 | Advance precipitation construction method of oversized-section double-side lower pilot tunnels of water-rich tunnel |
| CN104500077A (en) * | 2014-12-10 | 2015-04-08 | 中铁二十局集团有限公司 | Construction method for enabling shallowly buried and darkly excavated tunnel to pass through cottage area |
| CN104631475A (en) * | 2015-01-20 | 2015-05-20 | 中铁隧道集团有限公司杭州公司 | Safe and fast construction method of down-traversing river shallow depth bored tunnel |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107818200A (en) * | 2017-09-28 | 2018-03-20 | 中南大学 | Advanced tubule steel arch frame lock foot anchoring stock integration mechanics design methods and its model |
| CN107818200B (en) * | 2017-09-28 | 2021-02-09 | 中南大学 | Design and calculation method for advanced small conduit-steel arch frame-foot locking anchor rod integrated mechanical model |
| CN109812271A (en) * | 2019-01-25 | 2019-05-28 | 中铁十一局集团城市轨道工程有限公司 | A kind of shield crosses the construction method for invading limit box culvert |
| CN109812271B (en) * | 2019-01-25 | 2020-08-28 | 中铁十一局集团城市轨道工程有限公司 | Construction method for shield-crossing limited box culvert |
| CN110219256A (en) * | 2019-06-17 | 2019-09-10 | 中建六局土木工程有限公司 | A kind of channel complexity Construction of Supporting method for passing through box culvert |
| CN110409496A (en) * | 2019-08-01 | 2019-11-05 | 中铁第四勘察设计院集团有限公司 | Intermediate box culvert structure size determines method |
| CN110409496B (en) * | 2019-08-01 | 2021-07-13 | 中铁第四勘察设计院集团有限公司 | Method for determining structure size of middle box culvert |
| CN114320342A (en) * | 2021-12-10 | 2022-04-12 | 力信测量(上海)有限公司 | Installation method and system of arc-shaped box culvert in tunnel |
| CN117433488A (en) * | 2023-12-20 | 2024-01-23 | 北京城建集团有限责任公司 | Building high formwork state monitoring architecture system and method |
| CN117433488B (en) * | 2023-12-20 | 2024-03-29 | 北京城建集团有限责任公司 | Building high formwork state monitoring architecture system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106761779B (en) | 2019-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106761779B (en) | A kind of shallow-depth-excavation tunnel passes through the construction method of box culvert | |
| Wu et al. | Identification of tunnel settlement caused by land subsidence in soft deposit of Shanghai | |
| CN105443132B (en) | Shallow buried covered excavation cross stull method for tunnel construction | |
| CN106567717B (en) | It is a kind of to double as construction access ramp structure and construction method using subway entrance | |
| CN104727828B (en) | Tunnel pre-support management method based on deformation control | |
| CN101922302A (en) | Fault processing method of high pressure water enrichment area | |
| CN109594991A (en) | Shallow Buried Soft Rock Super-large-section tunnel CD method combines rapid constructing method with benching tunnelling method | |
| Zhao et al. | Function mechanism and analytical method of a double layer pre-support system for tunnel underneath passing a large-scale underground pipe gallery in water-rich sandy strata: A case study | |
| CN110259458A (en) | The construction method that small-clear-distance tunnel Shallow Section double -side approach excavates | |
| CN106400768B (en) | Collapsible loess tunnel submerging test method | |
| CN107725086B (en) | A kind of reinforcement means of the non-structural longitudinal crack of lining cutting | |
| CN108709977A (en) | A kind of ground preloading influences the indoor model test device and test method of existing subway tunnel | |
| CN109441456A (en) | A kind of the tunnel structure and its construction method of weakness Facility-sliding strata | |
| Wang et al. | Laboratory model tests on water inrush in foundation pit bottom | |
| CN111365020A (en) | Back-pressure backfill construction method suitable for biased hole entry under poor geological conditions | |
| CN115595993A (en) | Replacement pile structure of tunnel-passing slope slide-resistant pile and construction method | |
| Miliziano et al. | Prediction of tunnelling-induced effects on a historic building in Rome | |
| CN108222951A (en) | Pass through fine sand layer tunnel portal weak surrounding rock section constructing method | |
| Tao et al. | Construction analysis of Guiyang Metro passing across Guiyang Railway Station in karst zone | |
| Fang et al. | Model test and numerical simulation on the invert heave behaviour of high-speed railway tunnels with rainstorm | |
| CN106324222A (en) | Model testing device for simulating underground tunnel construction and use method of model testing device | |
| CN205805546U (en) | A kind of drift-sand stratum highway tunnel structure | |
| CN107165447A (en) | The method of construction in underground cylinder garage | |
| CN209195412U (en) | A kind of tunnel structure suitable for weak Facility-sliding strata | |
| CN108167021B (en) | The safe blocking method in high level radioactive waste repository roadway excavation perturbing area |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |