CN110259485A - A kind of loess tunnel support system and its installation method - Google Patents
A kind of loess tunnel support system and its installation method Download PDFInfo
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- CN110259485A CN110259485A CN201910654860.XA CN201910654860A CN110259485A CN 110259485 A CN110259485 A CN 110259485A CN 201910654860 A CN201910654860 A CN 201910654860A CN 110259485 A CN110259485 A CN 110259485A
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- 238000009434 installation Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000004567 concrete Substances 0.000 claims abstract description 57
- 239000002131 composite material Substances 0.000 claims abstract description 45
- 238000007569 slipcasting Methods 0.000 claims description 10
- 238000009412 basement excavation Methods 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 6
- 230000005641 tunneling Effects 0.000 claims description 6
- 230000010412 perfusion Effects 0.000 claims description 4
- 238000003491 array Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 9
- 239000010959 steel Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 16
- 230000008093 supporting effect Effects 0.000 description 13
- 239000011435 rock Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 239000011378 shotcrete Substances 0.000 description 6
- 238000007363 ring formation reaction Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001976 improved effect Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
- E21D11/183—Supporting means for arch members, not provided for in E21D11/22
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (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 a kind of loess tunnel support system and its installation methods, support system includes several compact arranged composite structure arches, each composite structure arch includes wing plate and hollow pipe, and hollow pipe is mounted on the inside of wing plate, and pipe inner concrete is perfused in hollow pipe；Form concrete is perfused between adjacent composite structure arch；Composite structure arch is circumferentially divided into bow supporter, haunch bracket, arch springing bracket and arch lower supporter, each bracket and uses bayonet joint, be completely embedded seamless.Composite structure arch, pipe inner concrete and form concrete three parts collective effect, improve the bearing capacity of Tunnel.The support system combines the advantages of steel and concrete, and the two can effectively be made to be combined into one, and being formed has higher rigidity and high-intensitive composite structure, and concrete is at three dimension stress state due to the package by steel, is more advantageous to the performance of intensity.
Description
Technical field
The invention belongs to tunnel support structure technical field more particularly to a kind of loess tunnel support system and its installation sides
Method.
Background technique
Common preliminary bracing structure type is shaped steel arch and gunite concrete to loess tunnel at this stage, but when supporting
The problem of can not quickly being provided there are still supporting intensity deficiency, supporting intensity.Therefore, all occur in many loess tunnels at home
Arch distortion, fracture, gunite concrete cracking, the case where landslide in surface subsidence, hole.
This problem is mainly reflected in: (1) design reasons.Deep, shallow embedding boundary depth defines unclear；Just branch, two lining loads
Allocation proportion is difficult to clear；(2) construction reason.Construction is complicated, process is various, and the processes such as excavation, stand, gunite concrete exist
It interferes with each other, can not carry out simultaneously, supporting construction intensity forms slower, it is difficult to accomplish " strong supporting ", " fast cyclization ".Meanwhile it applying
Working medium amount is also difficult to ensure that bolt is difficult to whole connections between arch, and gunite concrete connect bad adhesion with arch, especially one
A little bad geological sections, gunite concrete are difficult to complete, and also are difficult to be formed even if completing intensity.
Therefore, high-strength supporting construction is very necessary for the safe construction of loess tunnel, is especially in anxious in loess tunnel
Acute deformation stage, early to limit its deformation quantity particularly important for the control of large deformation, and prevent surrouding rock stress state from disliking
The key of change.
Summary of the invention
The purpose of the present invention is to provide a kind of loess tunnel support system and its installation methods, solve loess tunnel morning
The problem of phase supporting intensity is insufficient, supporting intensity can not be provided quickly.
The present invention is to be achieved through the following technical solutions:
A kind of loess tunnel support system, including several compact arranged composite structure arches, each composite structure arch
Frame includes wing plate and hollow pipe, and hollow pipe is mounted on the inside of wing plate, and pipe inner concrete is perfused in hollow pipe；Adjacent group
It closes and is perfused with form concrete between structure arch；
Injected hole is preset on hollow pipe.
Further, composite structure arch is circumferentially divided into bow supporter, haunch bracket, arch springing bracket and arch lower supporter；
Bow supporter and arch lower supporter are oppositely arranged, and haunch bracket is symmetrically disposed on bow supporter both ends, arch springing bracket pair
Title is set to arch lower supporter both ends, and haunch bracket one end is connect with bow supporter, and the other end is connect with one end of arch springing bracket, arch
The other end of foot support is connect with arch lower supporter；
Bow supporter and haunch bracket, haunch bracket and arch springing bracket and arch springing bracket and arch lower supporter are all made of spigot-and-socket
Connection.
Further, bow supporter includes vault wing plate and vault hollow pipe, and vault hollow pipe is fixed on the inside of vault wing plate；
Haunch bracket includes haunch wing plate and haunch hollow pipe, and haunch hollow pipe is fixed on the inside of haunch wing plate；
Arch springing bracket includes arch springing wing plate and arch springing hollow pipe, and arch springing hollow pipe is fixed on the inside of arch springing wing plate；
Encircleing lower supporter includes arch bottom wing plate and arch bottom hollow pipe, and arch bottom hollow pipe is fixed on the inside of arch bottom wing plate.
Further, vault hollow pipe and haunch hollow pipe, haunch hollow pipe and arch springing hollow pipe and arch springing hollow pipe and arch
Bottom hollow pipe passes through tube faucet and connects with pipe socket circumferential direction.
Further, vault hollow pipe both ends use tube faucet；Haunch hollow pipe and arch springing hollow pipe one end use tube faucet,
The other end uses pipe socket；Encircle bottom hollow pipe both ends and uses pipe socket.
Further, injected hole is preset on arch springing hollow pipe.
Further, gas vent is preset on vault wing plate.
Further, hollow pipe uses rectangular tube, rectangular tube or polygonal tube.
The invention also discloses the installation methods of the loess tunnel support system, comprising the following steps:
1) after the completion of soil excavation, by multiple composite structure arch close-packed arrays and chamber is installed on tunneling direction
It is interior；
2) slip casting is carried out by injected hole, completes pouring for pipe inner concrete；
3) place template on the outside of every two adjacent hollow pipe, template and hollow tubular at space in coagulation is perfused
Soil completes pouring for form concrete.
Further, composite structure arch is circumferentially divided into bow supporter, haunch bracket, arch springing bracket and arch lower supporter；
In step 1), the installation steps of composite structure arch specifically:
1.1) haunch bracket is installed in chamber two sides first, completes the installation of haunch bracket；
1.2) bow supporter is installed among two haunch brackets, the installation of bow supporter is completed on circumferential direction；
1.3) an arch springing bracket is connected in one end of each haunch bracket, the installation of arch springing bracket is completed on circumferential direction；
1.4) the installation arch lower supporter between two arch springing brackets, the installation of arch lower supporter is completed on circumferential direction, completes first
The installation of a composite structure arch；
1.5) step 1.1)~1.4 are repeated), complete next composite structure arch.
Compared with prior art, the invention has the following beneficial technical effects:
A kind of loess tunnel support system disclosed by the invention, including composite structure arch, pipe inner concrete and mould build it is mixed
Solidifying soil three parts, are closed using composite structure arch and excavate space, and the first floor supporting construction of support system is formed, and carrying, which is excavated, to be produced
Raw country rock load, composite structure arch is as arch bearing bed；Hollow combination structure includes wing plate and hollow pipe, by sky
Intrusion pipe inner concrete keeps hollow combination structure arch closely knit in heart pipe, forms concrete filled steel tube skeleton structure, undertakes timeliness change
The country rock load of change, pipe inner concrete is as reinforcing carcass bearing bed；Space between each skeleton, mould are filled using form concrete
Concrete is built as internal filling bearing bed, three bearing beds form complete preliminary bracing bearing bed.The support system combines
The advantages of steel and concrete, both can effectively make to be combined into one, and being formed has higher rigidity and high-intensitive combination
Structure, concrete are at three dimension stress state due to the package by steel, are more advantageous to the performance of intensity.Using mould
The gap between the mode closed gantry of concrete is built, using the skeleton structure of the composite structure arch set up as template branch
Frame forms it into the concrete layer of bigger thickness, and support rigidity is improved, also, the mode that mould is built is more advantageous to concrete
Maintenance, guarantee the quality of concrete construction.
Further, tunnel excavation is partial excavation, and not tunneling boring is constructed, and composite structure arch is circumferentially divided into arch
Ceiling hold, haunch bracket, arch springing bracket and arch four part of lower supporter, are connected using branch, can match tunnel after arch segmentation
Construction method, meanwhile, segmentation also facilitates arch and is conveyed into hole.
Further, connection is completed by tube faucet and pipe socket between each bracket, does not need additional bolt and nut and carries out
Connection, installation is easier, realizes the circumferential connection between bracket, guarantees the compactness of entire support system structure connection.
Further, injected hole is preset on arch springing hollow pipe, from bottom to up concrete perfusion, so that slip casting is more evenly.
Further, it is prefabricated with gas vent on vault wing plate, additional air in hollow pipe can be discharged in slip casting operation
And dross, guarantee slip casting operation quality.
The invention also discloses the installation method of loess tunnel support system, first installation composite structure arch, combination knots
After structure arch is set up, country rock can be closed immediately, can quickly propel face, quickly cyclization；In the case where guaranteeing safe enabled condition,
The construction of concrete perfusion and form concrete is more flexible in managing, and it can be carried out simultaneously with the propulsion of face, accomplish respectively to apply
The zero interference of work process.Composite structure arch can complete the closing to circumferential country rock after being installed, offer earlier is radial
Stress makes country rock be in advantageous triaxial stress state, reduces the extension of plastic zone.It can be become according to practice of construction condition and country rock
Shape situation is adjusted flexibly the time for injecting of steel pipe concrete filled and just lining concrete mould is built opportunity, improves construction efficiency.Combination
Structure arch is installed the good section of rear supporting effect, and face can push ahead, the primary pipe completed in number cyclic advance
Interior slip casting and just lining concrete mould build work, and simplified process flow accelerates construction progress.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of support system of the invention；
Fig. 2 is the structural schematic diagram of composite structure arch；
Fig. 3 is the structural schematic diagram of bow supporter；
Fig. 4 is the structural schematic diagram of haunch bracket；
Fig. 5 is the structural schematic diagram of arch springing bracket；
Fig. 6 is the structural schematic diagram for encircleing lower supporter；
Fig. 7 is support system construction technology floor map of the invention.
Wherein, 1 is pipe inner concrete, and 2 be form concrete, and 1-1 is bow supporter, and 1-2 is haunch bracket, and 1-3 is arch
Foot support, 1-4 are arch lower supporter, and 3 be wing plate, and 3-1 is vault wing plate, and 3-2 is haunch wing plate, and 3-3 is arch springing wing plate, and 3-4 is
Encircle bottom wing plate, 4 be hollow pipe, and 4-1 is vault hollow pipe, and 4-2 is haunch hollow pipe, and 4-3 is arch springing hollow pipe, and 4-4 is arch bottom
Hollow pipe, 5 be tube faucet, and 6 be pipe socket, and 7 be gas vent, and 8 be injected hole.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
As shown in Figure 1, a kind of loess tunnel support system of the invention, including composite structure arch, 1 and of pipe inner concrete
2 three parts of form concrete, composite structure arch is by wing plate 3 and hollow pipe 4 is prefabricated forms, and hollow pipe 4 is mounted in wing plate 3
Side is perfused with pipe inner concrete 1 in hollow pipe 4, is perfused with form concrete 2 between adjacent composite structure arch.
As shown in Fig. 2, composite structure arch is divided into bow supporter 1-1, haunch bracket 1-2, arch springing bracket 1-3 and arch bottom branch
Frame 1-4, bow supporter 1-1 and arch lower supporter 1-4 are oppositely arranged, and haunch bracket 1-2 is symmetrically disposed on the both ends bow supporter 1-1,
Arch springing bracket 1-3 is symmetrically disposed on the arch both ends lower supporter 1-4, and haunch one end bracket 1-2 is connect with bow supporter 1-1, the other end
It is connect with one end of arch springing bracket 1-3, the other end of arch springing bracket 1-3 is connect with arch lower supporter 1-4；Bow supporter 1-1, haunch
The circumferential connection of bracket 1-2, arch springing bracket 1-3 and arch lower supporter 1-4 are connected by tube faucet 5 with 6 socket joint of pipe socket.
As shown in figure 3, bow supporter 1-1 includes vault wing plate 3-1 and vault hollow pipe 4-1, the circumferential direction of bow supporter 1-1
Interconnecting piece uses tube faucet 5.There is prefabricated gas vent 7 at the top of bow supporter 1-1, is discharged in slip casting operation more in hollow pipe 4
Remaining air and dross guarantee slip casting operation quality.
As shown in figure 4, haunch bracket 1-2 includes haunch wing plate 3-2 and haunch hollow pipe 4-2, wherein haunch bracket 1-2 ring
It is pipe socket 6 to connection top, lower part is tube faucet 5.
As shown in figure 5, arch springing bracket 1-3 includes arch springing wing plate 3-3 and arch springing hollow pipe 4-3, wherein arch springing bracket 1-3 ring
It is pipe socket 6 to connection top, lower part is tube faucet 5.Arch springing bracket 1-3 side surface part has prefabricated injected hole 8, after closing cyclization
Slip casting operation is carried out by injected hole 8, pipe inner concrete 1 is completed and pours.
As shown in fig. 6, arch lower supporter 1-4 includes arch bottom wing plate 3-4 and arch bottom hollow pipe 4-4, encircle the circumferential direction of lower supporter 1-4
Interconnecting piece is all made of pipe socket 6.
Bow supporter 1-1 is also possible to both ends and uses 6 structure of pipe socket, and the arch both ends lower supporter 1-4 use 5 knot of tube faucet
Structure；Or four portion support be all one end using 5 structure of tube faucet, the other end uses 6 structure of pipe socket.As long as by adjacent two
Portion support links together.
More preferably, rectangular tube, rectangular tube or polygonal tube can be used in hollow pipe 4.
The construction technology of composite structure support system specifically:
1) after the completion of soil excavation, by multiple composite structure arch close-packed arrays and chamber is installed on tunneling direction
It is interior；
When for benching tunnelling method construction, the specific installation process of composite structure arch are as follows:
1.1) haunch bracket 1-2 is installed in chamber two sides first, completes the installation of haunch bracket 1-2；
1.2) bow supporter 1-1 is placed between two haunch bracket 1-2, by bow supporter 1-1 and haunch branch on circumferential direction
Frame 1-2 is aligned with pipe socket 6 by tube faucet 5 and is fixedly connected, and the installation of bow supporter 1-1 is completed；
1.3) an arch springing bracket 1-3 is connected in one end of each haunch bracket 1-2, by haunch bracket 1-2 on circumferential direction
It is aligned and is fixedly connected with pipe socket 6 by tube faucet 5 with arch springing bracket 1-3, complete the installation of arch springing bracket 1-3；
1.4) arch lower supporter 1-4 is placed between two arch springing bracket 1-3, by arch springing bracket 1-3 and arch bottom branch on circumferential direction
Frame 1-4 is aligned with pipe socket 6 by tube faucet 5 and is fixedly connected, and the installation of arch lower supporter 1-4 is completed, and so far completes first group
Close the installation of structure arch；
1.5) step 1.1)~1.4 are repeated), complete next composite structure arch.It is adjacent bow supporter 1-1, adjacent
Haunch bracket 1-2, adjacent arch springing bracket 1-3 and adjacent arch lower supporter 1-4 be in the longitudinal direction only tight on tunneling direction
It gets together, not additional connection structure, along tunneling direction, multiple composite structure arches is successively installed.
2) after composite structure arch closing cyclization, carry out slip casting operation from injected hole 8, until in gas vent 7 without air and
Dross overflows, and completes pouring for pipe inner concrete 1.
3) after completing composite structure arch and 1 operation of pipe inner concrete, mould is placed on the outside of every two adjacent hollow pipe 4
Plate, the concrete perfusion in the space that template and hollow pipe 4 are formed, completes 2 operation of form concrete, encircles it with composite structure
Composite structure support system is collectively formed in frame and pipe inner concrete 1.
4) it is laid with splash guard in 2 inner surface of form concrete, and applies secondary lining in time.Preliminary bracing surfacing,
Convenient-laying waterproof layer makes integral waterproofing effect promoting.
Support system of the invention has the advantage that
(1) increase support rigidity and intensity: be on the one hand embodied in steel-concrete combined structure have stronger resistance to compression, anti-torsion,
Bending resistance；On the other hand bigger thickness can be accomplished by being embodied in form concrete layer, overcome gunite concrete linked network
The limitation of thickness and the big problem of springback capacity.
(2) change the rigidity ratio of preliminary bracing, secondary lining: using preliminary bracing as the arrying main body of loess tunnel,
Improve loess surrouding rock stress condition by the preliminary bracing of " high-strength, early strong ".
(3) the offer supporting intensity of timesharing branch: on the basis of hollow arch quick closure country rock, by being perfused in pipe
Concrete, form concrete are to adapt to loess pressure from surrounding rock gradual change propagation process.
(4) improve arch frame structure stability: skeleton structure use concrete filled steel tube, cross sectional shape be rectangle, it is rectangular or
The inhomogeneities of polygon, strong and weak axis bending stiffness substantially reduces, and compares more original shaped steel arch, and Outside-plate stabilizing performance is able to
It is promoted.
(5) biggish supporting intensity can be provided immediately after the stand of composite structure arch, and due to composite structure arch and
Form concrete layer changes the rigidity ratio of just branch and two linings, can provide biggish supporting earlier as preliminary bracing
Counter-force plays positive effect for the generation of the extension of limitation plastic zone of surrounding rock, reduction loose load.It is dependent on this, it can be to two
The thickness of secondary lining cutting suitably reduces, to guarantee constant excavated section and controllable construction cost.
Claims (10)
1. a kind of loess tunnel support system, which is characterized in that including several compact arranged composite structure arches, each group
Closing structure arch includes wing plate (3) and hollow pipe (4), and hollow pipe (4) is mounted on the inside of wing plate (3), is filled in hollow pipe (4)
It is marked with pipe inner concrete (1)；Form concrete (2) are perfused between adjacent composite structure arch；
Injected hole (8) are preset on hollow pipe (4).
2. loess tunnel support system according to claim 1, which is characterized in that composite structure arch is circumferentially divided into arch
Ceiling hold (1-1), haunch bracket (1-2), arch springing bracket (1-3) and arch lower supporter (1-4)；
Bow supporter (1-1) and arch lower supporter (1-4) are oppositely arranged, and haunch bracket (1-2) is symmetrically disposed on bow supporter (1-1)
Both ends, arch springing bracket (1-3) are symmetrically disposed on arch both ends lower supporter (1-4), haunch bracket one end (1-2) and bow supporter (1-
1) it connects, the other end is connect with the one end of arch springing bracket (1-3), and the other end and arch lower supporter (1-4) of arch springing bracket (1-3) are even
It connects；
Bow supporter (1-1) and haunch bracket (1-2), haunch bracket (1-2) and arch springing bracket (1-3) and arch springing bracket (1-3)
Bayonet joint is all made of with arch lower supporter (1-4).
3. loess tunnel support system according to claim 2, which is characterized in that bow supporter (1-1) includes the vault wing
Plate (3-1) and vault hollow pipe (4-1), vault hollow pipe (4-1) are fixed on the inside of vault wing plate (3-1)；
Haunch bracket (1-2) includes haunch wing plate (3-2) and haunch hollow pipe (4-2), and haunch hollow pipe (4-2) is fixed on haunch
On the inside of wing plate (3-2)；
Arch springing bracket (1-3) includes arch springing wing plate (3-3) and arch springing hollow pipe (4-3), and arch springing hollow pipe (4-3) is fixed on arch springing
On the inside of wing plate (3-3)；
Encircleing lower supporter (1-4) includes arch bottom wing plate (3-4) and arch bottom hollow pipe (4-4), and arch bottom hollow pipe (4-4) is fixed on arch bottom
On the inside of wing plate (3-4).
4. loess tunnel support system according to claim 3, which is characterized in that vault hollow pipe (4-1) and haunch are empty
Heart pipe (4-2), haunch hollow pipe (4-2) and arch springing hollow pipe (4-3) and arch springing hollow pipe (4-3) and arch bottom hollow pipe (4-4)
Pass through tube faucet (5) and the circumferential connection of pipe socket (6).
5. loess tunnel support system according to claim 4, which is characterized in that the vault hollow pipe both ends (4-1) use
Tube faucet (5)；Haunch hollow pipe (4-2) and arch springing hollow pipe one end (4-3) use tube faucet (5), and the other end uses pipe socket
(6)；Encircle the bottom hollow pipe both ends (4-4) and uses pipe socket (6).
6. loess tunnel support system according to claim 2, which is characterized in that it is hollow that injected hole (8) is preset in arch springing
It manages on (4-3).
7. loess tunnel support system according to claim 2, which is characterized in that be preset on vault wing plate (3-1)
Gas vent (7).
8. loess tunnel support system according to claim 1, which is characterized in that hollow pipe (4) is using rectangular tube, rectangular
Pipe or polygonal tube.
9. the installation method of loess tunnel support system described in claim 1~8 any one, which is characterized in that including following
Step:
1) it after the completion of soil excavation, by multiple composite structure arch close-packed arrays and is installed in chamber on tunneling direction；
2) slip casting is carried out by injected hole (8), completes pouring for pipe inner concrete (1)；
3) template is placed on the outside of every two adjacent hollow pipe (4), perfusion is mixed in the space that template and hollow pipe (4) are formed
Solidifying soil, completes pouring for form concrete (2).
10. the installation method of loess tunnel support system according to claim 9, which is characterized in that composite structure arch
Circumferentially it is divided into bow supporter (1-1), haunch bracket (1-2), arch springing bracket (1-3) and arch lower supporter (1-4)；
In step 1), the installation steps of composite structure arch specifically:
1.1) haunch bracket (1-2) is installed in chamber two sides first, completes the installation of haunch bracket (1-2)；
1.2) bow supporter (1-1) is installed among two haunch brackets (1-2), the peace of bow supporter (1-1) is completed on circumferential direction
Dress；
1.3) an arch springing bracket (1-3) is connected in one end of each haunch bracket (1-2), arch springing bracket is completed on circumferential direction
The installation of (1-3)；
1.4) installation arch lower supporter (1-4) between two arch springing brackets (1-3), completes the peace of arch lower supporter (1-4) on circumferential direction
Dress, completes the installation of first composite structure arch；
1.5) step 1.1)~1.4 are repeated), complete next composite structure arch.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022084A (en) * | 2019-11-19 | 2020-04-17 | 长安大学 | Large-section loess tunnel excavation primary support arch frame single truss and method |
| CN111219200A (en) * | 2020-03-18 | 2020-06-02 | 长安大学 | Buckling-restrained assembled tunnel combined structure supporting system and construction method thereof |
| CN112832825A (en) * | 2021-01-19 | 2021-05-25 | 华北理工大学 | Assembled hollow sandwich concrete filled steel tube arch center and construction method thereof |
| CN112832817A (en) * | 2021-01-27 | 2021-05-25 | 兖州中材建设有限公司 | Underground chamber ore bin supporting structure and construction process thereof |
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| CN205532619U (en) * | 2016-04-19 | 2016-08-31 | 长安大学 | Loess tunnel support system |
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