CN110318762A - Advanced support method in hole at shallow buried covered excavation unsymmetrial loading tunnel roof fall - Google Patents
Advanced support method in hole at shallow buried covered excavation unsymmetrial loading tunnel roof fall Download PDFInfo
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- CN110318762A CN110318762A CN201910676552.7A CN201910676552A CN110318762A CN 110318762 A CN110318762 A CN 110318762A CN 201910676552 A CN201910676552 A CN 201910676552A CN 110318762 A CN110318762 A CN 110318762A
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000009412 basement excavation Methods 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 63
- 239000010959 steel Substances 0.000 claims abstract description 63
- 210000005239 tubule Anatomy 0.000 claims abstract description 37
- 230000002787 reinforcement Effects 0.000 claims abstract description 22
- 238000007569 slipcasting Methods 0.000 claims description 14
- 238000010276 construction Methods 0.000 claims description 13
- 239000002689 soil Substances 0.000 claims description 12
- 239000004568 cement Substances 0.000 claims description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 238000004873 anchoring Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 7
- 238000005553 drilling Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000013461 design Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 1
- 239000004927 clay Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000013213 extrapolation Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 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
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Classifications
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- 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
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- 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
-
- 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
- E21D20/00—Setting anchoring-bolts
-
- 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
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses advanced support methods in hole at a kind of shallow buried covered excavation unsymmetrial loading tunnel roof fall, include the following steps: advance geologic prediction；Back-pressure backfills in hole；Vertical leading truck；Supporting Shed-pipe Advanced Support, and steel reinforcement cage grouting behind shaft or drift lining is arranged in the seamless steel pipe of each pipe canopy；Earth excavation from top to bottom；Preliminary bracing is applied under pipe canopy, and is that support sets advanced tubule, and sets completion grouting behind shaft or drift lining in advanced tubule and complete supporting with I-steel used by preliminary bracing after the completion of supporting in the early stage.Advanced support method passes through first supporting Shed-pipe Advanced Support in hole at the shallow buried covered excavation unsymmetrial loading tunnel roof fall that the present invention obtains, the mode of advanced tubule is set again to progress supporting at tunnel roof fall, pipe shed support angle is big, can maximum magnitude to the tunnel place of collapsing formed strength support, and then facilitate later period preliminary bracing and the setting of advanced tubule, meanwhile it not needing to excavate the operating room Guan Peng when supporting in the early stage yet.
Description
Technical field
The present invention relates to a kind of constructing tunnel fields, and in particular to advanced in hole at a kind of shallow buried covered excavation unsymmetrial loading tunnel roof fall
Method for protecting support.
Background technique
Mountain road construction, tunnel is essential Structural Engineering, can effectively reduce link length, and optimization is linear.
In constructing tunnel, especially sandy clay geology section tunnel, mostly occur roof fall cave-in accident, and earth's surface is mostly used to reinforce collapsing body,
The advance supports measure such as pipe canopy or advanced tubule is set in hole.If China State Intellectual Property Office is in public affairs on October 19th, 2018
A kind of sandy clay geology tunnel treatment of roof collapse method opened, comprising: advance geologic prediction, roof fall soil surface treatment, back-pressure in hole
Backfill, advanced tubule supporting carry out the advanced pre-reinforcement of bimetallic tube canopy using alternately drilling tool pipe-following drilling method and handle, excavate, apply
Work terminates to continue monitoring measurement.The sandy clay geology tunnel treatment of roof collapse method safety is reliable, can reduce the construction wind in tunnel
Danger, consolidation effect is obvious, can efficiently control vault and collapse again, easy for construction, can ensure that construction quality.
Above-mentioned construction method requires pipe canopy extrapolation angle (5 ° ~ 10 °) and the operating room Guan Peng, and pipe canopy extrapolation angle is too
It is small, if beating pipe canopy by this angle when practice of construction, the preliminary bracing of front supporting is destroyed, and then can not be by former design requirement
Applying steel tube shed, (after roof fall, upper soil horizon is soft, and excavating the operating room Guan Peng without condition can lead if unprocessed excavate rashly
Cause secondary roof fall).Based on this, apply for that human desires by improvement working procedure and technique requirement, reduces the technology difficulty of advance support,
And effectively promote its construction efficiency.
Summary of the invention
In view of the above shortcomings of the prior art, the technical problems to be solved by the present invention are: how providing one kind can drop
The technology difficulty of low advance support, and propped up in advance in hole at a kind of shallow buried covered excavation unsymmetrial loading tunnel roof fall of effectively lifting construction efficiency
Maintaining method.
In order to solve the above-mentioned technical problem, present invention employs the following technical solutions:
Advanced support method in hole at a kind of shallow buried covered excavation unsymmetrial loading tunnel roof fall, which comprises the steps of: S1 surpasses
Preceding geologic prediction using TSP tunnel seismic wave advanced geology prediction system and geological radar double-direction control, and carries out Comparative result
Analysis, determines rock mass situation；S2 with native back-pressure backfill in hole, then with sand material adds cement backfill top roof fall collapse hole, to top
It no longer collapses, soil is no longer fallen in hole, that is, enter and construct in next step；S3 founds leading truck in tunnel tunnel face, leading truck in arch springing and
It is fixed at haunch with lock foot anchoring stock；S4, it is advanced along Tunnel Design shape supporting to support with leading truck above tunnel tunnel face
Pipe canopy, the pipe canopy use φ 108mm seamless steel pipe, and circumferentially disposed spacing is 20-40cm, and seamless steel pipe is sent into drilling machine, root
It is made according to actual needs according to roof fall length, setting angle is 10 ~ 30 °；S5 is inserted in steel reinforcement cage in each seamless steel pipe in S4
And slip casting；S5 excavates area using " circumferential direction excavates provided core soil method " after Shed-pipe Advanced Support slip casting completion intensity reaches requirement
Face ring is to the cubic metre of earth and stone until it can found arch；S6 applies preliminary bracing under pipe canopy, and with initial stage after the completion of supporting in the early stage
I-steel used by supporting be support set advanced tubule, after the completion of advanced tubule is set by advanced tubule to
Slip casting above face, advance support is completed in hole；S7, construction terminate, encryption arrangement monitoring point, according to monitoring result, if any
It needs to take reinforcement measure again.In this way, making support deployment tube canopy by setting leading truck at face with leading truck, and will pipe
The angle that sets of canopy controls between 10-30 °, and the later period sets advanced tubule again, the inclination angle of pipe canopy in this working procedure
Degree is big, can maximum magnitude strength support is formed to the tunnel place of collapsing, and then facilitate later period preliminary bracing and advanced tubule
Setting, meanwhile, it does not need to excavate the operating room Guan Peng when supporting in the early stage yet.In addition, being excavated in advance when supporting in the early stage using circumferential
The mode of Core Soil is stayed to excavate from top to bottom, the leading truck set up early period supports stress, advanced tubule and super-front large pipe shed
The grouting and reinforcing soil body guarantees that subsequent cycle excavates safety, and subsequent handling can orderly follow up, be not required to individually excavate inverted arch.And super
The steel reinforcement cage being arranged is set in the seamless steel pipe of front tube canopy can further increase the intensity of Shed-pipe Advanced Support, make it under larger angle
Also it is able to achieve the purpose of firm support.Reduce two lining encroachment lines, the later period can directly apply preliminary bracing, compound advanced branch under pipe canopy
Shield, which ensures, excavates safety.
Further, the leading truck is formed by connecting using at least two Pin arches, and every Pin arch is all made of multistage arc
I-steel is welded, and the arch springing of every Pin arch and haunch are fixed using lock foot anchoring stock.In this way, the setting of leading truck can
The powerful support to Shed-pipe Advanced Support is formed, and after being fixed at the arch springing and haunch of leading truck middle arch rack with lock foot anchoring, it can
Effectively improve its stability.
Further, it is connected between adjacent two Pin arch using 22 reinforcing bar of φ, the circumferential spacing between adjacent two reinforcing bars
For 45-55cm.In this way, steel-bar arrangement density is close, diameter is big, the intensity of leading truck can be effectively promoted, its branch is further promoted
Support force.
Further, for steel reinforcement cage main reinforcement employed in S5 using 3 20 reinforcing bar uniform intervals of φ arrangements, every 1 meter sets one
Road fixed ring, fixed ring are the seamless steel pipe of φ 45mm wall thickness 4mm long 40mm.In this way, the fixed ring in steel reinforcement cage can be into one
Step improves the intensity of steel reinforcement cage, and then effectively promotes the supporting intensity of Shed-pipe Advanced Support, and steel reinforcement cage main reinforcement is relatively large in diameter, can be effective
Ensure the intensity of steel reinforcement cage.
Further, in S5 and S6 slip casting use cement slurry water and cement weight ratio for 0.8:1~1:1, slip casting
Pressure is 0.4~0.7MPa.In this way, cement slurry when slip casting has preferable mobility, and can preferably melt with the earthwork
It closes.
Further, the seamless steel pipe in Shed-pipe Advanced Support, the supporting of advanced tubule should be avoided when setting advanced tubule
Angle is 5 °~15 °.In this way, can avoid steel pipe when advanced tubule is set in vibrating tube canopy, its stability is influenced, meanwhile,
After avoiding the seamless steel pipe in pipe canopy, the steel pipe of advanced tubule can be improved so i.e. with the steel pipe arranged in dislocation in steel pipe
The integral strength of tunnel support.
Further, steel pipe inner end used by the advanced tubule and Shed-pipe Advanced Support is processed into cone, in advance
The tube wall surrounding of ductule offers the mud jacking hole of multiple rows of Φ 5-9mm, and the seamless steel pipe closing surrounding of Shed-pipe Advanced Support offers more
Arrange the mud jacking hole of Φ 18-24mm.In this way, one end of cone can be convenient for the insertion of steel pipe, resistance when setting steel pipe is reduced, and
The size in mud jacking hole and the capacity of its slurry are corresponding, are not in generation phenomena such as overflowing slurry.
Further, the steel pipe outer end used by each advanced tubule and Shed-pipe Advanced Support is equipped with a hoop of putting more energy into,
It is described to put more energy into that bind round diameter consistent with diameter of steel tube.In this way, can reduce two lining encroachment lines, the later period can directly apply initial stage branch under pipe canopy
Shield, compound advance support, which ensures, excavates safety.
Compared with prior art, advanced support method has in hole at the shallow buried covered excavation unsymmetrial loading tunnel roof fall that the present invention obtains
Following advantage:
1, support deployment tube canopy is made with leading truck, and the angle that sets of pipe canopy is controlled between 10-30 °, the later period sets super again
Preceding ductule, the tilt angle of pipe canopy is big in this working procedure, can maximum magnitude strength formed to the tunnel place of collapsing support,
And then facilitate later period preliminary bracing and the setting of advanced tubule, meanwhile, it does not need to excavate the work of pipe canopy when supporting in the early stage yet
Room.
2, the steel reinforcement cage being arranged is set in the seamless steel pipe of Shed-pipe Advanced Support can further increase the intensity of Shed-pipe Advanced Support, make it
Firm support can be also formed under larger angle.
Detailed description of the invention
Fig. 1 is Tunnel barrel canopy front arrangement in embodiment；
Fig. 2 is that pipe canopy and ductule combine advance support cross-section diagram in embodiment；
Fig. 3 is the enlarged structure schematic diagram of seamless steel pipe in pipe canopy in embodiment.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Embodiment:
As shown, advanced support method in hole at shallow buried covered excavation unsymmetrial loading tunnel roof fall provided in this embodiment, it includes
Following steps: S1, advance geologic prediction, using TSP tunnel seismic wave advanced geology prediction system and geological radar double-direction control,
And Comparative result analysis is carried out, determine rock mass situation；S2 with native back-pressure backfill in hole, then with sand material adds cement backfill top
Roof fall collapse hole no longer collapses to top, soil is no longer fallen in hole, that is, enters and construct in next step；S3, in the vertical guiding of tunnel tunnel face 1
Frame (is not drawn into) in figure, and leading truck is fixed at arch springing and haunch with lock foot anchoring stock；S4, to be oriented to above tunnel tunnel face 1
Frame is support along Tunnel Design shape supporting Shed-pipe Advanced Support 2, and the pipe canopy uses φ 108mm seamless steel pipe 21, circumferentially disposed
Away from for 40cm, seamless steel pipe 21 is sent into drilling machine, is made according to actual needs according to roof fall length, and setting angle is 10 ~ 30 °；S5,
Steel reinforcement cage and slip casting are inserted in each seamless steel pipe in S4；S5 is adopted after Shed-pipe Advanced Support slip casting completion intensity reaches requirement
The face circumferential direction cubic metre of earth and stone is excavated until it can found arch with " circumferential direction excavates provided core soil method "；S6 is applied under pipe canopy
Preliminary bracing 3, and be that support sets advanced tubule 4 with I-steel used by preliminary bracing 3 after the completion of supporting in the early stage 3,
By advanced tubule 4 to slip casting above face after the completion of advanced tubule 4 is set, advance support is completed in hole；S7 is applied
Work terminates, and reinforcement measure is taken according to monitoring result in encryption arrangement monitoring point again if needed.
The above-mentioned circumferential provided core soil method that excavates is a kind of prior art, and construction operation process: manually or single armed tunnels
Machine excavates annular arch one and erects one pneumatically placed concrete of bracing members.Under the protection of arch initial support, to accelerate progress, digging is preferably used
Pick machine or single boom roadheader excavate Core Soil and get out of a predicament or an embarrassing situation, at any time spreading bracing members and pneumatically placed concrete, back cover.Depending on initial support
Deformation or construction way arrange construction secondary lining operation.Under normal circumstances, section is divided into annular arch, upper core
The three parts such as cubsoil, lower step.According to the size of section, annular arch can be divided into several pieces again and alternately excavate.Ring Cutting into
Ruler is 0.5~1.0m, unsuitable too long.Length of bench is generally advisable in 1D (D refers generally to tunnel span) with controlling.
The leading truck is formed by connecting using at least two Pin arches, and every Pin arch is all made of the welding of multistage arc I-steel
It forms, and the arch springing of every Pin arch and haunch are fixed using lock foot anchoring stock.Connected between adjacent two Pin arch using 22 reinforcing bar of φ
It connects, the circumferential spacing between adjacent two reinforcing bars is 45-55cm.
For steel reinforcement cage main reinforcement employed in S5 using 3 20 reinforcing bar uniform intervals of φ arrangements, every 1 meter sets one of fixed ring,
Fixed ring is the seamless steel pipe of φ 45mm wall thickness 4mm long 40mm.
In S5 and S6 slip casting use cement slurry water and cement weight ratio for 0.8:1~1:1, grouting pressure 0.4
~0.7MPa.
The seamless steel pipe in Shed-pipe Advanced Support should be avoided when setting advanced tubule, the supporting angle of advanced tubule is 10 °.
When setting, since the lower end of the seamless steel pipe in Shed-pipe Advanced Support is stretched out under dark hole lining cutting, can accurately it learn advanced
The position of each steel pipe in pipe canopy, to provide advantage for setting for advanced tubule.
Steel pipe inner end used by the advanced tubule and Shed-pipe Advanced Support is processed into cone, advanced tubule 4
Tube wall surrounding offers the mud jacking hole 41 of multiple rows of Φ 5-9mm, and the seamless steel pipe of Shed-pipe Advanced Support closes surrounding and offers multiple rows of Φ 18-
The mud jacking hole of 24mm.
The steel pipe outer end used by each advanced tubule and Shed-pipe Advanced Support is equipped with a hoop 5 of putting more energy into, described to put more energy into
It is consistent with diameter of steel tube to bind round diameter.
When pipe canopy mud jacking, secondary grouting is had to, is started before first time mud jacking initial set, so that slurries are sufficiently spread, if
Roof fall position water content is big, can be with water mixing glass biliquid mud jacking.Advanced tubule and steel arch-shelf reinforcement welding are firm, it is ensured that open
Dig safety.
Finally, it should be noted that technical side the above examples are only used to illustrate the technical scheme of the present invention and are not limiting
Case, although applicant describes the invention in detail referring to preferred embodiment, those skilled in the art should be managed
Solution, modification or equivalent replacement of the technical solution of the present invention are made for those, without departing from the objective and range of the technical program,
It is intended to be within the scope of the claims of the invention.
Claims (8)
1. advanced support method in hole at a kind of shallow buried covered excavation unsymmetrial loading tunnel roof fall, which comprises the steps of: S1,
Advance geologic prediction using TSP tunnel seismic wave advanced geology prediction system and geological radar double-direction control, and carries out result pair
Than analysis, rock mass situation is determined；S2 with native back-pressure backfill in hole, then with sand material adds cement backfill top roof fall collapse hole, to upper
Portion no longer collapses, and soil is no longer fallen in hole, that is, enters and construct in next step；S3 founds leading truck in tunnel tunnel face (1), and leading truck exists
It is fixed at arch springing and haunch with lock foot anchoring stock；S4 with leading truck is support along Tunnel Design shape above the tunnel tunnel face (1)
Supporting Shed-pipe Advanced Support (2), the pipe canopy are installed using seamless steel pipe (21), the circumferential cloth between two neighboring seamless steel pipe (21)
Setting spacing is 20-40cm, and every seamless steel pipe is sent into drilling machine, is made according to actual needs according to roof fall length, set angle
It is 10 ~ 30 °；S5 is inserted in steel reinforcement cage and slip casting in each seamless steel pipe in S4；S5 completes intensity to Shed-pipe Advanced Support slip casting
After reaching requirement, the face circumferential direction cubic metre of earth and stone is excavated until it can found arch using " circumferential direction excavates provided core soil method "；S6,
It is applied under pipe canopy preliminary bracing (3), and is that support is beaten with I-steel used by preliminary bracing after the completion of supporting in the early stage (3)
It is advanced in hole by advanced tubule to slip casting above face after the completion of advanced tubule is set if advanced tubule (4)
Supporting is completed；S7, construction terminate, and reinforcement measure is taken according to monitoring result in encryption arrangement monitoring point again if needed.
2. advanced support method in hole at shallow buried covered excavation unsymmetrial loading tunnel roof fall according to claim 1, which is characterized in that institute
It states leading truck to be formed by connecting using at least two Pin arches, every Pin arch is all made of multistage arc I-steel and is welded, and every
The arch springing and haunch of one Pin arch are fixed using lock foot anchoring stock.
3. advanced support method in hole at shallow buried covered excavation unsymmetrial loading tunnel roof fall according to claim 1, which is characterized in that phase
It is connected between adjacent two Pin arches using 22 reinforcing bar of φ, the circumferential spacing between adjacent two reinforcing bars is 45-55cm.
4. advanced support method in hole at shallow buried covered excavation unsymmetrial loading tunnel roof fall according to claim 1, which is characterized in that S5
Employed in steel reinforcement cage main reinforcement using 3 20 reinforcing bar uniform intervals of φ arrangement, every 1 meter sets one of fixed ring, fixed ring φ
The seamless steel pipe of 45mm wall thickness 4mm long 40mm.
5. advanced support method in hole at shallow buried covered excavation unsymmetrial loading tunnel roof fall according to claim 1, which is characterized in that S5
With slip casting in S6 use cement slurry water and cement weight ratio for 0.8:1~1:1, grouting pressure be 0.4~0.7MPa.
6. advanced support method in hole at shallow buried covered excavation unsymmetrial loading tunnel roof fall according to claim 1, which is characterized in that beat
If should avoid the seamless steel pipe in Shed-pipe Advanced Support when advanced tubule, the supporting angle of advanced tubule is 5 °~10 °.
7. advanced support method in hole at shallow buried covered excavation unsymmetrial loading tunnel roof fall according to claim 1, which is characterized in that institute
It states steel pipe inner end used by advanced tubule and Shed-pipe Advanced Support and is processed into cone, the tube wall surrounding of advanced tubule (4)
The mud jacking hole (41) of multiple rows of Φ 5-9mm is offered, the seamless steel pipe of Shed-pipe Advanced Support closes surrounding and offers multiple rows of Φ 18-24mm's
Mud jacking hole.
8. advanced support method in hole at shallow buried covered excavation unsymmetrial loading tunnel roof fall according to claim 7, which is characterized in that
Steel pipe outer end used by each advanced tubule and Shed-pipe Advanced Support is equipped with one and puts more energy into hoop (5), described hoop (5) diameter of putting more energy into
It is consistent with diameter of steel tube.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111734423A (en) * | 2020-07-30 | 2020-10-02 | 中铁隆工程集团有限公司 | Primary support method for underground tunnel passing through airport terminal building |
| CN111828049A (en) * | 2020-07-28 | 2020-10-27 | 中建七局安装工程有限公司 | Shallow-buried underground excavation tunnel advanced small guide pipe construction method |
| CN112127900A (en) * | 2020-09-07 | 2020-12-25 | 中国水利水电第十四工程局有限公司 | Construction method for hidden half-wall and half-arch protection structure of exposed arch of shallow-buried bias tunnel penetrating through accumulation body |
| CN112228082A (en) * | 2020-10-29 | 2021-01-15 | 中铁一局集团有限公司 | Tunnel collapse treatment method by combined grouting of pipe shed and advanced small guide pipe |
| CN113982613A (en) * | 2021-09-29 | 2022-01-28 | 中铁七局集团有限公司 | Efficient grouting reinforcement method for advance and tunnel bottom of karst collapse area |
| CN114135318A (en) * | 2021-12-06 | 2022-03-04 | 江西丰强科技发展有限公司 | Closely-adhered underpass tunnel lining structure and construction method thereof |
| CN114198119A (en) * | 2021-11-19 | 2022-03-18 | 中交路桥南方工程有限公司 | Tunnel roof fall emergency treatment structure and construction method |
| CN114635716A (en) * | 2022-05-17 | 2022-06-17 | 中国建筑第六工程局有限公司 | Pipe shed advanced supporting method with built-in section steel and application thereof |
| CN115012955A (en) * | 2022-06-22 | 2022-09-06 | 保利长大工程有限公司 | Construction method for large pipe shed at inlet of multi-arch tunnel |
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