CN208918561U - A kind of small interval overlapping tunnel folder rock ruggedized construction - Google Patents
A kind of small interval overlapping tunnel folder rock ruggedized construction Download PDFInfo
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- CN208918561U CN208918561U CN201821498004.7U CN201821498004U CN208918561U CN 208918561 U CN208918561 U CN 208918561U CN 201821498004 U CN201821498004 U CN 201821498004U CN 208918561 U CN208918561 U CN 208918561U
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- tunnel
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- 239000011435 rock Substances 0.000 title claims abstract description 44
- 238000010276 construction Methods 0.000 title claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims description 25
- 239000010959 steel Substances 0.000 claims description 25
- 239000004567 concrete Substances 0.000 claims description 20
- 238000009826 distribution Methods 0.000 claims description 6
- 238000009412 basement excavation Methods 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 5
- 238000007569 slipcasting Methods 0.000 claims description 4
- 238000004873 anchoring Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 239000002689 soil Substances 0.000 claims description 2
- 230000015271 coagulation Effects 0.000 claims 1
- 238000005345 coagulation Methods 0.000 claims 1
- 230000003014 reinforcing effect Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 239000011440 grout Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
The utility model provides a kind of small interval overlapping tunnel folder rock ruggedized construction, including the Counter-pulled bolts of the crown pipe canopy, the inverted arch pipe canopy and abutment wall pipe canopy and drawknot that upper layer tunnel bottom is arranged in of lower layer's tunnel top between upper layer tunnel and lower layer tunnel are arranged in；Counter-pulled bolts arranged for interval in the lap position of upper layer tunnel bottom and lower layer's tunnel top, both ends respectively anchor connection in upper layer, lower layer tunnel, main body be threaded through the folder rock between upper layer, lower layer tunnel；The utility model ruggedized construction forms the effect of clamping and reinforcing to small interval overlapping tunnel folder rock, has effectively shared upper load, and construction method is simple, easily operated.
Description
Technical field
The utility model relates to constructing tunnel field, in particular to a kind of small interval overlapping tunnel presss from both sides rock ruggedized construction.
Background technique
With the fast development of infrastructure construction in china, engineering space constantly extends, and Tunnel Engineering also gradually increases, and
In small interval, more caverns, big cross section trend, to Tunnel Design construction bring new challenge.It is built in small interval overlapping tunnel
If in, it is to influence that since upper and lower constructing tunnel disturbs repeatedly, folder petrosa position is often the weakest between tunnel, and stress is the most complicated
The key link of overlapping tunnel overall stability, therefore often certain technological means need to be taken to carry out at reinforcing it in work progress
Reason.Currently, being front pre-grouting to the overlapping tunnel folder most common reinforcing means of rock, but front pre-grouting is suitable for weak broken
Rock stratum, and for relatively compact stratum, slip casting relative difficulty, consolidation effect is extremely limited, it is, therefore, desirable to provide a kind of be applicable in
In the ruggedized construction of small interval overlapping tunnel folder rock.
Utility model content
The utility model proposes a kind of small interval overlapping tunnel folder rock ruggedized constructions to solve the above problems, specific skill
Art scheme are as follows: a kind of small interval overlapping tunnel folder rock ruggedized construction, crown pipe canopy, setting including lower layer's tunnel top is arranged in
In the Counter-pulled bolts between upper layer tunnel and lower layer tunnel of inverted arch pipe canopy and abutment wall pipe canopy and drawknot of upper layer tunnel bottom；
The Counter-pulled bolts arranged for interval is in the lap position of upper layer tunnel bottom and lower layer's tunnel top, both ends difference
It is connected in upper layer tunnel and lower layer tunnel, in the folder rock that main body is threaded through between upper layer tunnel and lower layer tunnel.
The crown pipe canopy and inverted arch pipe canopy include the pipe fitting of one group of parallel interval distribution；The abutment wall pipe canopy is symmetrically set
It is placed in the two sides inverted arch Guan Peng and is installed along tunnel side wall, every side wall coil canopy includes the pipe fitting of one group of parallel interval distribution.
The pipe fitting of the crown pipe canopy, inverted arch pipe canopy and abutment wall pipe canopy is longitudinally therethrough the tunnel not excavated each along tunnel
Interior, the pipe fitting is slip casting pipe fitting.
The Counter-pulled bolts are arranged drawing along upper layer tunnel and lower layer's tunnel cross section lap outer profile, along upper layer tunnel
Road and lower layer tunnel are longitudinally in the distribution of plum blossom-shaped parallel interval.
Upper layer tunnel bottom excavation contour line or more is protruded into the upper end of the Counter-pulled bolts, and the end of Counter-pulled bolts is cast in
In shotcrete layer, at least two layers of the concrete layer.
The concrete layer is to be close to be equipped with reinforced mesh, the reinforcing bar between folder rock bottom concrete and upper layer concrete
Mesh sheet is equipped with W steel band of model.
The upper end of the Counter-pulled bolts sequentially passes through reinforced mesh, W steel band of model, backing plate, Counter-pulled bolts end from the bottom to top
Bending is connect with backing plate, to be fixed in W steel band of model, and be further cast in concrete.
The lower end of the Counter-pulled bolts passes through concrete layer and reinforced mesh and W steel band of model, and by roof bolt plate and
Fixing bolt anchoring.
The W fashioned iron is arranged with one group and along tunnel longitudinal direction parallel interval, and every W steel band of model is correspondingly connected with one
Counter-pulled bolts in cross section.
The utility model has the following beneficial effects:
The utility model is to the bimetallic tube canopy by lower layer tunnel and upper layer tunnel and tilts Counter-pulled bolts to small interval folder
Rock forms effective clamping action, improves and presss from both sides the bearing capacity of rock and the overall stability of overlapping tunnel in work progress, and
" rock beam " the carrying system being consequently formed plays certain supporting role, can effectively share top country rock, structure and operation load；
The end of Counter-pulled bolts may make Counter-pulled bolts and small interval to press from both sides the interaction between rock using measures such as W steel band of model and backing plates
Reinforce, improves folder rock integral reinforcing effect and bearing capacity；It is more close and loose that the utility model is applicable to folder rock rock mass
Type, application range is wider, and sectional branch constructs when construction, and construction technology is simple, effectively saves working hour, improves and applies
Work efficiency rate.
Detailed description of the invention
Fig. 1 is small interval overlapping tunnel folder rock ruggedized construction schematic diagram；
Fig. 2 is Counter-pulled bolts schematic diagram.
Appended drawing reference: 1- lower layer tunnel；The upper layer 2- tunnel；3- presss from both sides rock；4- crown pipe canopy；5- inverted arch pipe canopy；6- abutment wall pipe
Canopy；7- Counter-pulled bolts；8-W steel band of model；9- reinforced mesh；The first layer concrete of 10-；The second layer concrete of 11-；12- screw-thread steel
Pipe；13- snorkel；14- air inlet；15- grouting port；16- grout outlet；17- hollow bolt；18- roof bolt plate；19- backing plate；
The gas outlet 20-.
Specific embodiment
As shown in Figure 1, overlapping tunnel is in the distribution of falling isosceles triangle in the present embodiment, it is a lower layer tunnel 1, two upper layer tunnels
Road 2 has small interval at two to press from both sides rock 3 respectively between lower layer tunnel 1 and upper layer tunnel 2, crown pipe canopy is arranged at the top of lower layer tunnel 1
4, inverted arch pipe canopy 5 and abutment wall pipe canopy 6 and drawknot are set between upper layer tunnel 2 and lower layer tunnel 1 in 2 bottom of upper layer tunnel
Counter-pulled bolts 7；Lap position of 7 arranged for interval of Counter-pulled bolts at the top of 2 bottom of upper layer tunnel and lower layer tunnel 1, two
In the folder rock 3 that end is connected in upper layer tunnel 2 and lower layer tunnel 1, main body is threaded through between upper layer tunnel 2 and lower layer tunnel 1.
As shown in Fig. 2, use Counter-pulled bolts 7 for hollow grouting anchor in the present embodiment, comprising threaded steel pipe 12 and hollow
Anchor pole 17,12 one end of threaded steel pipe are located at upper layer tunnel, and one end is connected with 17 one end of hollow bolt, and connecting place is located in folder rock,
And having grout outlet 16 in junction, 17 other end of hollow bolt is located at lower layer tunnel；Snorkel is provided in Counter-pulled bolts 7
13, the air inlet 14 of snorkel 13 is located on the outside of 12 end of threaded steel pipe, and snorkel 13 passes through threaded steel pipe 12 and hollow bolt
Gas outlet 20 is arranged in its end port through 17 body of rod of hollow bolt in 17 junctions.
7 both ends of Counter-pulled bolts are injected with two layer concretes in the present embodiment, are provided with reinforced mesh between two layer concretes
9, the bending of 12 end of threaded steel pipe, bending end sprays in the second layer concrete 11, and backing plate 19 is welded with below bending end,
Backing plate 19 is placed in W steel band of model 8；17 lower end of hollow bolt is bolted, and is connected with roof bolt plate 18 in turn above bolt
With W steel band of model 8；Grouting port 15 is arranged in 17 lower end of hollow bolt, and mortar passes through hollow bolt 17, injects and bores in grout outlet 16
In hole.
Specific implementation steps are as follows:
Step 1, overlapping tunnel excavate preceding first at lower layer, 1 crown position, tunnel and 2 inverted arch of upper layer tunnel and abutment wall position
Apply pipe shed support.In this example, long 45 m of pipe canopy, using the φ mm round steel pipe of 127 mm × 6,40 cm of spacing, lower layer tunnel 1 is pushed up
The angle that 4 endpoint of arch tube canopy is formed is 130 °, and the equal stringing canopy in 2 inverted arch position of upper layer tunnel simultaneously extends to 2.5 m of abutment wall.Pass through
Upper and lower tunneltron canopy forms clamping to folder rock 3.
Step 2: overlapping tunnel is according to the sequence of construction of " getting on, get off ", first construction lower layer's tunnel after the completion of pipe canopy applies
Road 1 is constructed in this example using two side-wall pilot tunnel using Microseismic controlled blasting or mechanical means partial excavation, rock 3 to be pressed from both sides
After exposure (excavate 1. or 2. behind part), the construction of the first layer concrete 10 and armature boring are successively carried out, is successively installed after borehole cleaning
Reinforced mesh 9, W steel band of model 8, hollow grouting anchor, and bored grouting is carried out, termination point of anchor rod is anchored at by bolt and backing plate 18
In W steel band of model 8, the second layer concrete 11 is sprayed again after the completion of slip casting, so that the Counter-pulled bolts 7 for completing lower layer tunnel 1 are constructed.
Step 3: in construction, 7 length of Counter-pulled bolts should be enough to go deep into upper layer 50 cm of tunnel excavation contour line to be onstructed with
On, to guarantee to meet counter brace part.In this example, Counter-pulled bolts 7 use 22 Combined hollow grouted anchor bar of φ, circumferential and longitudinal cloth
Setting spacing is respectively 0.8 m and 0.5 m, and circumferentially disposed length is 3 m.
Step 4: continuing to excavate 1 remainder of lower layer tunnel (3.~6. portion) and applying preliminary bracing in time, serves as a contrast and apply to two
Switch to the construction of upper layer tunnel 2 after the completion of work.
Step 5: upper layer tunnel 2 carries out branch's construction using Microseismic controlled blasting or mechanical means, this example uses CD method,
8. → 9. from far from folder rock 3 to successively promoting (7. → → 10.) at nearly folder rock 3, construction to it is last close to 3 one, rock of folder (10.
Portion) when, hand excavation should be switched to, the integrality of its internal anchor pole is squeezed into protection, and after the folder exposure of rock 3, injection first layer first is mixed
Solidifying soil 10 is simultaneously laid with reinforced mesh 9, and W steel band of model 8 and roof bolt plate 19 are successively installed on Counter-pulled bolts 7, cuts off Counter-pulled bolts 7
Excessive portion bends 7 end of Counter-pulled bolts, and is weldingly connected with backing plate 19, sprays the second layer concrete 11 again, thus completes overlapping
The construction of tunnel folder rock ruggedized construction.
Obviously, above-described embodiment is only to illustrate explaination made by the outstanding feature of the utility model, and is not to this
The restriction of utility model embodiment；For those skilled in the art, still may be used on the basis of above explained use
To make other variations or changes in different ways, if not carrying out inventive improvements to it, belong to the protection model of the utility model
It encloses.
Claims (9)
1. a kind of small interval overlapping tunnel presss from both sides rock ruggedized construction, it is characterised in that: including the top being arranged at the top of lower layer tunnel (1)
Inverted arch pipe canopy (5) and abutment wall pipe canopy (6) and drawknot in upper layer tunnel (2) bottom is arranged in upper layer tunnel in arch tube canopy (4)
(2) Counter-pulled bolts (7) between lower layer tunnel (1)；
Lap position of Counter-pulled bolts (7) arranged for interval at the top of upper layer tunnel (2) bottom and lower layer tunnel (1), two
End is connected in upper layer tunnel (2) and lower layer tunnel (1), main body is threaded through between upper layer tunnel (2) and lower layer tunnel (1)
It presss from both sides in rock (3).
2. a kind of small interval overlapping tunnel according to claim 1 presss from both sides rock ruggedized construction, it is characterised in that: the crown pipe
The pipe fitting of canopy (4) and inverted arch pipe canopy (5) comprising the distribution of one group of parallel interval；The abutment wall pipe canopy (6) is symmetrically disposed on inverted arch
It pipe canopy (5) two sides and is installed along tunnel side wall, every side wall coil canopy (6) includes the pipe fitting of one group of parallel interval distribution.
3. a kind of small interval overlapping tunnel according to claim 2 presss from both sides rock ruggedized construction, it is characterised in that: the crown pipe
The pipe fitting of canopy (4), inverted arch pipe canopy (5) and abutment wall pipe canopy (6) is longitudinally therethrough in the tunnel not excavated each along tunnel, the pipe fitting
For slip casting pipe fitting.
4. a kind of small interval overlapping tunnel according to claim 1 presss from both sides rock ruggedized construction, it is characterised in that: described pair of drawing anchor
Bar (7) along upper layer tunnel (2) and lower layer tunnel (1) cross section lap outer profile to draw be arranged, along upper layer tunnel (2) and under
Layer tunnel (1) is longitudinally distributed in plum blossom-shaped parallel interval.
5. a kind of small interval overlapping tunnel according to claim 4 presss from both sides rock ruggedized construction, it is characterised in that: described pair of drawing anchor
Upper layer tunnel (2) bottom excavation contour line or more is protruded into the upper end of bar (7), and the end of Counter-pulled bolts (7) is cast in injection coagulation
In soil layer, at least two layers of the concrete layer.
6. a kind of small interval overlapping tunnel according to claim 5 presss from both sides rock ruggedized construction, it is characterised in that: the concrete
Layer is set on the reinforced mesh (9) to be close to be equipped with reinforced mesh (9) between folder rock (3) bottom concrete and upper layer concrete
There are W steel band of model (8).
7. a kind of small interval overlapping tunnel according to claim 6 presss from both sides rock ruggedized construction, it is characterised in that: described pair of drawing anchor
The upper end of bar (7) sequentially passes through reinforced mesh (9), W steel band of model (8), backing plate (18), Counter-pulled bolts (7) its end from the bottom to top
Bending is connect with backing plate (18), to be fixed on W steel band of model (8), and is further cast in concrete.
8. a kind of small interval overlapping tunnel according to claim 6 presss from both sides rock ruggedized construction, it is characterised in that: described pair of drawing anchor
The lower end of bar (7) passes through concrete layer and reinforced mesh (9) and W steel band of model (8), and passes through roof bolt plate (18) and fixed spiral shell
Bolt anchoring.
9. a kind of small interval overlapping tunnel according to claim 7 or 8 presss from both sides rock ruggedized construction, it is characterised in that: the W type
Steel band (8) has one group and is arranged along tunnel longitudinal direction parallel interval, and every W steel band of model (8) is correspondingly connected in a cross section
Counter-pulled bolts (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821498004.7U CN208918561U (en) | 2018-09-13 | 2018-09-13 | A kind of small interval overlapping tunnel folder rock ruggedized construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821498004.7U CN208918561U (en) | 2018-09-13 | 2018-09-13 | A kind of small interval overlapping tunnel folder rock ruggedized construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208918561U true CN208918561U (en) | 2019-05-31 |
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ID=66705452
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821498004.7U Expired - Fee Related CN208918561U (en) | 2018-09-13 | 2018-09-13 | A kind of small interval overlapping tunnel folder rock ruggedized construction |
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| CN (1) | CN208918561U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108979676A (en) * | 2018-09-13 | 2018-12-11 | 中国建筑土木建设有限公司 | A kind of small interval overlapping tunnel folder rock ruggedized construction and its construction method |
| CN111485914A (en) * | 2020-04-13 | 2020-08-04 | 中铁二院工程集团有限责任公司 | Rock pillar construction method in replacement of high-ground-stress soft rock large-deformation ultra-small clear distance tunnel |
| CN112539064A (en) * | 2020-11-30 | 2021-03-23 | 青岛理工大学 | Blasting vibration reduction construction method for close tunnel with composite pilot tunnel and preset composite vibration isolation layer |
-
2018
- 2018-09-13 CN CN201821498004.7U patent/CN208918561U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108979676A (en) * | 2018-09-13 | 2018-12-11 | 中国建筑土木建设有限公司 | A kind of small interval overlapping tunnel folder rock ruggedized construction and its construction method |
| CN108979676B (en) * | 2018-09-13 | 2024-03-26 | 中国建筑土木建设有限公司 | Small-clear-distance overlapped tunnel rock clamping reinforcing structure and construction method thereof |
| CN111485914A (en) * | 2020-04-13 | 2020-08-04 | 中铁二院工程集团有限责任公司 | Rock pillar construction method in replacement of high-ground-stress soft rock large-deformation ultra-small clear distance tunnel |
| CN111485914B (en) * | 2020-04-13 | 2021-07-13 | 中铁二院工程集团有限责任公司 | Rock pillar construction method in replacement of high-ground-stress soft rock large-deformation ultra-small clear distance tunnel |
| CN112539064A (en) * | 2020-11-30 | 2021-03-23 | 青岛理工大学 | Blasting vibration reduction construction method for close tunnel with composite pilot tunnel and preset composite vibration isolation layer |
| CN112539064B (en) * | 2020-11-30 | 2022-02-11 | 青岛理工大学 | Blasting vibration reduction construction method for close tunnel with composite pilot tunnel and preset composite vibration isolation layer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190531 |