CN108798679A - Steel tube shed goes out cavity construction method in shallow embedding single-track railway tunnel hole - Google Patents
Steel tube shed goes out cavity construction method in shallow embedding single-track railway tunnel hole Download PDFInfo
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- CN108798679A CN108798679A CN201810596224.1A CN201810596224A CN108798679A CN 108798679 A CN108798679 A CN 108798679A CN 201810596224 A CN201810596224 A CN 201810596224A CN 108798679 A CN108798679 A CN 108798679A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 55
- 239000010959 steel Substances 0.000 title claims abstract description 55
- 238000010276 construction Methods 0.000 title claims abstract description 49
- 238000007569 slipcasting Methods 0.000 claims abstract description 33
- 238000009412 basement excavation Methods 0.000 claims abstract description 14
- 230000008093 supporting effect Effects 0.000 claims abstract description 10
- 238000009415 formwork Methods 0.000 claims abstract description 9
- 238000004080 punching Methods 0.000 claims abstract description 9
- 238000004088 simulation Methods 0.000 claims abstract description 3
- 239000004567 concrete Substances 0.000 claims description 17
- 238000005553 drilling Methods 0.000 claims description 12
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 241000743339 Agrostis Species 0.000 claims description 3
- 229910000712 Boron steel Inorganic materials 0.000 claims description 3
- 238000007596 consolidation process Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000013213 extrapolation Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 239000010437 gem Substances 0.000 claims description 3
- 229910001751 gemstone Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims 1
- 238000007689 inspection Methods 0.000 claims 1
- 238000013461 design Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012876 topography 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The present invention provides steel tube shed in a kind of shallow embedding single-track railway tunnel hole and goes out cavity construction method, is first digged along outline excavation on the basis of the top bar of existing three step, forms workbench；After platform is formed, by measuring alignment construction guidance wall；By force simulation, computer tube canopy squeezes into angle, and device to hole number is numbered, and number is the first punching of odd number, and then slip casting, odd number has been beaten plays even number and slip casting afterwards；To digging position formwork erection backfill after the completion of pipe roof construction；Restore main tunnel excavation supporting after backfill, excavation is appeared.To be limited by orographic condition when solving at present by steel tube shed into hole, regional custom cultural influence can not construct steel tube shed, lead to the problem into hole difficulty.Belong to constructing tunnel field.
Description
Technical field
The present invention relates to steel tube sheds in a kind of shallow embedding single-track railway tunnel hole to go out cavity construction method, belongs to constructing tunnel neck
Domain.
Background technology
Currently, tunnel outlet in the prior art is to have applied to be oriented to after wall and steel tube shed tunnel outlet again outside hole, but should
Technology can not be completed under special circumstances, such as：Temporarily do not have the condition (no place or road are obstructed) for applying pipe canopy outside hole,
It need to be that creation of appearing performs condition, seriously affect Tunnel Construction Schedule.
Invention content
It is an object of the invention to：Steel tube shed in a kind of shallow embedding single-track railway tunnel hole is provided and cavity construction method, with solution
Certainly at present by steel tube shed into limited by orographic condition when hole, regional custom cultural influence can not construct steel tube shed, cause into hole
Difficult problem.
To solve the above problems, quasi- go out cavity construction method using steel tube shed in such a shallow embedding single-track railway tunnel hole,
The specific method is as follows：
Step 1：It is digged along outline excavation on the basis of the top bar of existing three step, forms workbench；
Step 2：After platform is formed, by measuring alignment construction guidance wall；
Step 3：By force simulation, computer tube canopy squeezes into angle, device to hole position according to the sequence from a side to the other side into
Row number, number are the first punching of odd number, and then slip casting, odd number has been beaten plays even number and slip casting afterwards；
Step 4：To digging position formwork erection backfill after the completion of pipe roof construction；
Step 5：Restore main tunnel excavation supporting after backfill, excavation is appeared.
The workbench space that digs should meet down-the-hole drill working space, while ensure to be oriented to wall construction space.
Further：Provided pipe canopy is oriented to tube angulation when being oriented to wall concrete placings and steel tube shed squeezes into angle and coincide.
Further：It checks whether the outlet ends Guan Peng punch tunnel portal position before slip casting, needs to be sealed if punching
It is stifled.
Further：Face is blocked before slip casting, while reserved exhaust pipe ensures slip casting effect.
Further：Digging space takes ad eundem concrete formwork erection to backfill.
Further：Reinforce excavation supporting measure, reinforces advance support on the original basis.
Preferably, step 1 digs top bar, tubing canopy operation platform：7m in advance when main tunnel is excavated to pipe roof construction position
Top bar is digged, step height up improves 1.2m on the basis of existing, declines 0.7m toward middle step, digs rear top bar
Height 4.75m, width 9.93m, length 7m reserve down-the-hole drill working space and lead wall and perform space.
Preferably, step 2 is oriented to wall construction：Wall is oriented to outside excavation contour line, is close to face and applies, leads wall use
C20 concretes, longitudinal long 1m, thickness 1m；
(1) it before being oriented to wall construction, is detected to being oriented to wall foundation bearing capacity, if Lack of support, carries out foundation stabilization
Processing；
(2) first with C20 concrete to carry out shop fixtures levelling, and the control of shop fixtures height is being oriented in foundation of wall absolute altitude；
(3) it is oriented to wall concrete construction and inner support is done using I18 profile steel frames, using 2 Pin framed bents；
(4) when being oriented to wall formwork erection, plan-position is set up to framed bent by survey crew and height carries out accurate setting-out, framed bent
It carries out consolidation process after positioning, card is welded and fixed using steelframe when reinforcing；
(5) it is oriented to wall model to install using plank, it is ensured that be oriented to wall construction size；
(6) guide pipe use Φ 127mm, the hot rolled seamless steel tube of wall thickness 5mm, when guide pipe is installed by survey crew into
Row is accurately positioned setting-out, is strictly controlled its direction and the gradient, and it is 2 ° that guide pipe, which installs the gradient, and 1m differences are 0.035m, side
To parallel with line direction, aperture is fixed after guide pipe positioning.
Preferably, the specific method is as follows for step 3 pipe roof construction：
(1) pipe canopy uses outer diameter for Φ 89mm, and wall thickness is the hot rolled seamless steel tube of 8mm；
(2) pipe canopy circumferential direction lays 23, and circumferential direction lays spacing 0.4m, the single long 30m of pipe canopy；
(3) when pipe canopy direction controlling, pipe canopy drilling extrapolation angle takes 2 °, direction：It is parallel to line midline；
(4) pipe canopy is divided into two kinds of 3m, 6m, and every pipe canopy is by 4 3m, 3 6m short tube canopies compositions, when scene is spliced, it is ensured that
The piece-ups in same cross section are less than or equal to 50%, and the connector of adjacent tubes canopy is staggered more than or equal to 1m；
(5) tube coupling connector use housing Φ 100mm, wall thickness be 3.5mm hot finished steel pipe, interior thread button, tube coupling be more than etc.
In 0.3m, the outer thread button 0.15m of pipe boron steel pipe fitting with tube coupling connector to connect；
(6) pipe shed drilling rig 89mm bit bores, the control of boring direction is used to be controlled using inclinometer, jewel hole is complete
High-pressure blast borehole cleaning is used at rear；
(7) steel pipe uses drilling machine jacking；
(8) when drilling machine jacking steel pipe, its thrust is made on same straight line, when jacking is had any problem, to use drill bit with steel pipe
Jacking again after progress borehole cleaning；
(9) slip casting connecting tube is welded in 89 steel tube heads of Φ after steel pipe jacking, is used in combination valve to carry out end and stops at slurry
Reason；
(10) tube shed grouting carries out slip casting using double-fluid grouting machine, and slip casting field test, grouting parameter are first carried out before slip casting
It is determined by actual conditions adjustment by field test；
(11) trial operation first is carried out to the slip casting machine for connecting pipeline before slip casting；
(12) main reinforcement φ 16, the steel reinforcement cage of stirrup φ 8 and overall diameter 7cm are installed in guide pipe additional.
Preferably, step 4 workbench closing backfill：Template backrest is done using top bar arch after tube shed grouting,
The small punching blocks of 20cm*150cm*5cm close mould and backfill C20 concrete, and ejection supporting operation, 7m job platforms are carried out after backfill
Restore main tunnel after the completion of supporting to excavate.
Compared with prior art, advantage of the present invention is as follows：
1, using existing equipment in hole, top bar dig and has built the work for being adapted to pipe roof construction in hole
Space, avoiding the Portal Section pipe canopy caused by topography inclement condition, custom culture limitation, expropriation of land problems of land utilization can not construct
The problem of；
2, there is stronger adaptability, main tunnel is constructed to pipe canopy design and construction fare register and do not interfered by external condition, in work
As space formed after can construct steel tube shed；
3, human resources are saved, are saved the duration, when hole inner tube canopy operation can work continuously, parallel operations, in synchronous construction
It gets out of a predicament or an embarrassing situation, inverted arch, two linings.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, the present invention will be made below further detailed
Explanation, it should be understood that described herein specific examples are only used to explain the present invention, is not intended to limit the present invention.
Embodiment：
The present embodiment provides steel tube sheds in a kind of shallow embedding single-track railway tunnel hole to go out cavity construction method：
Step 1 digs top bar, tubing canopy operation platform：7m will appear on the stage in advance when main tunnel is excavated to pipe roof construction position
Rank digs, and step height up improves 1.2m on the basis of existing, declines 0.7m toward middle step, digs rear top bar height
4.75m, width 9.93m, length 7m reserve down-the-hole drill working space and lead wall and perform space.
Step 2 is oriented to wall construction：Wall is oriented to outside excavation contour line, is close to face and applies, wall is led and uses C20 concretes, indulge
To long 1m, thickness 1m.
(1) it before being oriented to wall construction, is detected to being oriented to wall foundation bearing capacity, if Lack of support, carries out foundation stabilization
Processing.
(2) for the convenience of stand and formwork erection, it is levelling first shop fixtures to be carried out with C20 concrete, the control of shop fixtures height is being oriented to
In foundation of wall absolute altitude.
(3) it is oriented to wall concrete construction and inner support is done using I18 profile steel frames, using 2 Pin framed bents.
(4) when being oriented to wall formwork erection, plan-position is set up to framed bent by survey crew and height carries out accurate setting-out, with true
Protect the headroom size for being oriented to wall.Necessary consolidation process is carried out after framed bent positioning, and card is welded and fixed using steelframe when reinforcing.
(5) it is oriented to wall model to install using plank, it is ensured that be oriented to wall construction size (1m × 1m).
(6) guide pipe use Φ 127mm, the hot rolled seamless steel tube of wall thickness 5mm, when guide pipe is installed by survey crew into
Row is accurately positioned setting-out, is strictly controlled its direction and the gradient, and it is 2 ° (1m differences are 0.035m) that guide pipe, which installs the gradient,
Direction is parallel with line direction.Aperture is fixed after guide pipe positioning, to ensure that orifice tube is not moved in casting concrete
Dynamic and deformation.
Step 3 pipe roof construction：
(1) pipe canopy uses outer diameter for Φ 89mm, and wall thickness is the hot rolled seamless steel tube of 8mm.
(2) pipe canopy circumferential direction lays 23, and circumferential direction lays spacing 0.4m, the single long 30m of pipe canopy (guiding stays 1 meter within the walls).
(3) when considering that this tunnel line is the control of right avertence curvilinear slope within the scope of pipe roof construction when pipe canopy direction controlling
The problems such as considering the design grade for the degree of disturbing and pipe canopy that circuit longitudinal slope, 30m pipe canopies generate during setting in gravity,
In summary reason pipe canopy drilling extrapolation angle takes 2 °, direction：It is parallel to line midline.
(4) pipe canopy is divided into two kinds of 3m, 6m, and every pipe canopy is by 4 3m, 3 6m short tube canopies compositions.To keep pipe canopy connector wrong
It opens, when scene splicing should use different combinations to ensure the piece-ups in same cross section no more than 50%, adjacent tubes canopy
Connector is staggered the requirement not less than 1m.
(5) it is the hot finished steel pipe of 3.5mm that tube coupling connector, which uses housing Φ 100mm, wall thickness, and interior thread button, tube coupling is not less than
0.3m.The outer thread button 0.15m of pipe boron steel pipe fitting with tube coupling connector to connect.
(6) pipe shed drilling rig 89mm bit bores, the control of boring direction is used to be controlled using inclinometer, jewel hole is complete
High-pressure blast borehole cleaning is used at rear.(considers pipe roof construction length, should go out to confirm whether pipe canopy is punched in import, device to hole is answered if punching
It mouthful is blocked, when closure, reserved gas vent ensured slip casting effect.).
(7) steel pipe using drilling machine jacking (squeeze into the exposed 0.3m of first segment, again by excavator jacking after connection, and so on
Until being installed to design length).
(8) when drilling machine jacking steel pipe, make its thrust with steel pipe on same straight line as possible, when jacking is had any problem, no
Will jacking by force, avoid tube bending from deforming, in jacking after then carrying out borehole cleaning with small diameter drill bit.
(9) slip casting connecting tube is welded in 89 steel tube heads of Φ after steel pipe jacking, is used in combination valve to carry out end and stops at slurry
Reason, with mortar leakage prevention.
(10) tube shed grouting carries out slip casting using double-fluid grouting machine, the slurries cooperation that strictly empirically room provides when slip casting
Than preparing, slip casting field test is first carried out before slip casting, grouting parameter is determined by field test by actual conditions adjustment.
(11) trial operation is carried out, first to connecting the slip casting machine of pipeline to ensure that mechanical energy runs well before slip casting.(note
Slip casting first pressing 0.5^1.0Mpa, final pressure 2.0Mpa when slurry).
(12) main reinforcement φ 16, stirrup φ 8 are installed in guide pipe additional, total directly steel reinforcement cage of 7cm is to increase steel tube shed rigidity.
The closing backfill of step 4 workbench：Template backrest, 20cm* are done using top bar arch after tube shed grouting
The small punching blocks of 150cm*5cm close mould and backfill C20 concrete.Ejection supporting operation is carried out after backfill, 7m job platform supportings are complete
It is excavated at rear recovery main tunnel.
Step 5 main tunnel restores three step constructions：It waits for spraying again using reinforcing backrest arch after the completion of platform closing, be formed just
Hole support system, while restoring main tunnel excavation, you can realization is appeared.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (9)
1. steel tube shed goes out cavity construction method in shallow embedding single-track railway tunnel hole, which is characterized in that the specific method is as follows：
Step 1：It is digged along outline excavation on the basis of the top bar of existing three step, forms workbench；
Step 2：After platform is formed, by measuring alignment construction guidance wall；
Step 3：By force simulation, computer tube canopy squeezes into angle, and device to hole number is compiled according to from a side to the sequence of the other side
Number, number is the first punching of odd number, and then slip casting, odd number has been beaten plays even number and slip casting afterwards；
Step 4：To digging position formwork erection backfill after the completion of pipe roof construction；
Step 5：Restore main tunnel excavation supporting after backfill, excavation is appeared.
2. steel tube shed goes out cavity construction method in shallow embedding single-track railway tunnel hole according to claim 1, it is characterised in that：It is oriented to
Provided pipe canopy is oriented to tube angulation when wall concrete placings and steel tube shed squeezes into angle and coincide.
3. steel tube shed goes out cavity construction method in shallow embedding single-track railway tunnel hole according to claim 1, it is characterised in that：Slip casting
Whether the preceding outlet ends inspection Guan Peng punch tunnel portal position, need to be blocked if punching.
4. steel tube shed goes out cavity construction method in shallow embedding single-track railway tunnel hole according to claim 1, it is characterised in that：Slip casting
It is preceding that face is blocked, while reserved exhaust pipe ensures slip casting effect.
5. steel tube shed goes out cavity construction method in shallow embedding single-track railway tunnel hole according to claim 1, it is characterised in that：It digs
Ad eundem concrete formwork erection is taken to backfill in space.
6. steel tube shed goes out cavity construction method in shallow embedding single-track railway tunnel hole according to claim 1, it is characterised in that：Step
1 digs top bar, tubing canopy operation platform：7m digs top bar in advance when main tunnel is excavated to pipe roof construction position, existing
On the basis of step height up improve 1.2m, toward middle step decline 0.7m, dig rear top bar height 4.75m, width 9.93m,
Length 7m, reserves down-the-hole drill working space and leads wall and perform space.
7. steel tube shed goes out cavity construction method in shallow embedding single-track railway tunnel hole according to claim 1, it is characterised in that：Step
2 are oriented to wall construction：Wall is oriented to outside excavation contour line, is close to face and applies, wall is led and uses C20 concretes, longitudinal long 1m, thickness
1m；
(1) it before being oriented to wall construction, is detected to being oriented to wall foundation bearing capacity, if Lack of support, carries out stiffening basic ground；
(2) first with C20 concrete to carry out shop fixtures levelling, and the control of shop fixtures height is being oriented in foundation of wall absolute altitude；
(3) it is oriented to wall concrete construction and inner support is done using I18 profile steel frames, using 2 Pin framed bents；
(4) when being oriented to wall formwork erection, plan-position is set up to framed bent by survey crew and height carries out accurate setting-out, after framed bent positioning
Consolidation process is carried out, card is welded and fixed using steelframe when reinforcing；
(5) it is oriented to wall model to install using plank, it is ensured that be oriented to wall construction size；
(6) guide pipe uses Φ 127mm, the hot rolled seamless steel tube of wall thickness 5mm to be carried out accurately by survey crew when guide pipe is installed
Construction layout strictly controls its direction and the gradient, and it is 2 ° that guide pipe, which installs the gradient, and 1m differences are 0.035m, direction and line
Road direction is parallel, fixes aperture after guide pipe positioning.
8. steel tube shed goes out cavity construction method in shallow embedding single-track railway tunnel hole according to claim 1, which is characterized in that step
The specific method is as follows for 3 pipe roof constructions：
(1) pipe canopy uses outer diameter for Φ 89mm, and wall thickness is the hot rolled seamless steel tube of 8mm；
(2) pipe canopy circumferential direction lays 23, and circumferential direction lays spacing 0.4m, the single long 30m of pipe canopy；
(3) when pipe canopy direction controlling, pipe canopy drilling extrapolation angle takes 2 °, direction：It is parallel to line midline；
(4) pipe canopy is divided into two kinds of 3m, 6m, and every pipe canopy is by 4 3m, 3 6m short tube canopies compositions, when scene is spliced, it is ensured that same
The piece-ups in cross section are less than or equal to 50%, and the connector of adjacent tubes canopy is staggered more than or equal to 1m；
(5) it is the hot finished steel pipe of 3.5mm that tube coupling connector, which uses housing Φ 100mm, wall thickness, and interior thread button, tube coupling is more than or equal to
0.3m, the outer thread button 0.15m of pipe boron steel pipe fitting with tube coupling connector to connect；
(6) it uses pipe shed drilling rig 89mm bit bores, the control of boring direction to be controlled using inclinometer, is adopted after the completion of jewel hole
With high-pressure blast borehole cleaning；
(7) steel pipe uses drilling machine jacking；
(8) when drilling machine jacking steel pipe, its thrust is made on same straight line, when jacking is had any problem, to be carried out with drill bit with steel pipe
Jacking again after borehole cleaning；
(9) slip casting connecting tube is welded in 89 steel tube heads of Φ after steel pipe jacking, is used in combination valve to carry out end and stops slurry processing；
(10) tube shed grouting carries out slip casting using double-fluid grouting machine, slip casting field test is first carried out before slip casting, grouting parameter passes through
Field test is determined by actual conditions adjustment；
(11) trial operation first is carried out to the slip casting machine for connecting pipeline before slip casting；
(12) main reinforcement φ 16, the steel reinforcement cage of stirrup φ 8 and overall diameter 7cm are installed in guide pipe additional.
9. steel tube shed goes out cavity construction method in shallow embedding single-track railway tunnel hole according to claim 1, which is characterized in that step
The closing backfill of 4 workbenches：Template backrest, the small punching blocks of 20cm*150cm*5cm are done using top bar arch after tube shed grouting
Guan Mo backfills C20 concrete, and ejection supporting operation is carried out after backfill, restores just wide open after the completion of the supporting of 7m job platforms
It digs.
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| CN201810596224.1A CN108798679A (en) | 2018-06-11 | 2018-06-11 | Steel tube shed goes out cavity construction method in shallow embedding single-track railway tunnel hole |
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| CN201810596224.1A CN108798679A (en) | 2018-06-11 | 2018-06-11 | Steel tube shed goes out cavity construction method in shallow embedding single-track railway tunnel hole |
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Cited By (6)
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| CN109441456A (en) * | 2018-12-14 | 2019-03-08 | 中铁二院工程集团有限责任公司 | A kind of the tunnel structure and its construction method of weakness Facility-sliding strata |
| CN109667603A (en) * | 2018-12-28 | 2019-04-23 | 中铁第四勘察设计院集团有限公司 | A kind of super shallow-buried tunnel structure and construction method |
| CN109707399A (en) * | 2019-02-21 | 2019-05-03 | 中铁二院工程集团有限责任公司 | Tunnel outlet support structure and its construction method |
| CN110578536A (en) * | 2019-10-15 | 2019-12-17 | 中铁十二局集团有限公司 | Excavation support reinforcing method for underground excavation section of subway to penetrate existing street crossing channel |
| CN112780298A (en) * | 2020-12-31 | 2021-05-11 | 广东省交通规划设计研究院股份有限公司 | Assembled tunnel shallow-buried section shed tunnel structure and tunnel construction method |
| CN114961748A (en) * | 2022-06-23 | 2022-08-30 | 中铁九局集团第三建设有限公司 | Construction method of large pipe shed guide wall at tunnel opening of shallow tunnel |
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| CN109441456A (en) * | 2018-12-14 | 2019-03-08 | 中铁二院工程集团有限责任公司 | A kind of the tunnel structure and its construction method of weakness Facility-sliding strata |
| CN109441456B (en) * | 2018-12-14 | 2024-04-09 | 中铁二院工程集团有限责任公司 | Tunnel entering structure of weak and slippery stratum and construction method thereof |
| CN109667603A (en) * | 2018-12-28 | 2019-04-23 | 中铁第四勘察设计院集团有限公司 | A kind of super shallow-buried tunnel structure and construction method |
| CN109707399A (en) * | 2019-02-21 | 2019-05-03 | 中铁二院工程集团有限责任公司 | Tunnel outlet support structure and its construction method |
| CN109707399B (en) * | 2019-02-21 | 2024-01-30 | 中铁二院工程集团有限责任公司 | Tunnel exit supporting structure and construction method thereof |
| CN110578536A (en) * | 2019-10-15 | 2019-12-17 | 中铁十二局集团有限公司 | Excavation support reinforcing method for underground excavation section of subway to penetrate existing street crossing channel |
| CN112780298A (en) * | 2020-12-31 | 2021-05-11 | 广东省交通规划设计研究院股份有限公司 | Assembled tunnel shallow-buried section shed tunnel structure and tunnel construction method |
| CN112780298B (en) * | 2020-12-31 | 2023-12-22 | 广东省交通规划设计研究院集团股份有限公司 | Tunnel construction method using fabricated tunnel shallow buried section shed tunnel structure |
| CN114961748A (en) * | 2022-06-23 | 2022-08-30 | 中铁九局集团第三建设有限公司 | Construction method of large pipe shed guide wall at tunnel opening of shallow tunnel |
| CN114961748B (en) * | 2022-06-23 | 2023-03-10 | 中铁九局集团第三建设有限公司 | Construction method of large pipe shed guide wall at tunnel opening of shallow tunnel |
| WO2023174439A1 (en) * | 2022-06-23 | 2023-09-21 | 中铁九局集团第三建设有限公司 | Construction method for large pipe shed guide wall at shallow tunnel portal |
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