CN107288653A - A kind of the benching tunnelling method excavation supporting structure of weak surrounding rock large cross-section tunnel double -side approach three and construction method - Google Patents

A kind of the benching tunnelling method excavation supporting structure of weak surrounding rock large cross-section tunnel double -side approach three and construction method Download PDF

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Publication number
CN107288653A
CN107288653A CN201710501927.7A CN201710501927A CN107288653A CN 107288653 A CN107288653 A CN 107288653A CN 201710501927 A CN201710501927 A CN 201710501927A CN 107288653 A CN107288653 A CN 107288653A
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CN
China
Prior art keywords
supporting
base tunnel
shelf
construction
excavation
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Application number
CN201710501927.7A
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Chinese (zh)
Inventor
黄新宇
何磊
汪伟
李行利
王宁
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中铁十局集团第四工程有限公司
中铁十一局集团第四工程有限公司
中铁十局集团有限公司
中铁十一局集团有限公司
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Application filed by 中铁十局集团第四工程有限公司, 中铁十一局集团第四工程有限公司, 中铁十局集团有限公司, 中铁十一局集团有限公司 filed Critical 中铁十局集团第四工程有限公司
Priority to CN201710501927.7A priority Critical patent/CN107288653A/en
Publication of CN107288653A publication Critical patent/CN107288653A/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/10Lining 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
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/14Lining predominantly with metal
    • E21D11/18Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00Setting anchoring-bolts
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/14Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings

Abstract

A kind of extrusion pressing type weak surrounding rock large section short tunnel excavation supporting structure and construction method, structure include top supporting, middle part supporting and bottom supporting from top to bottom, and top supporting includes left side wall base tunnel supporting(1), mid-board supporting(3)With right side wall base tunnel supporting(2), middle part supporting include left step supporting(4)With step supporting in the right side(5), bottom supporting include lower-left step supporting(6)With bottom right step supporting(7);Method includes following step:Left side wall base tunnel supporting(1)Excavation construction, right side wall base tunnel supporting(2)Excavation construction, mid-board supporting(3)Excavation construction, the construction of middle part supporting excavation, the construction of bottom supporting excavation.The strong sinking for having resisted arch country rock, has ensured the safety of construction, while shortening anchor cable applies the time, has saved engineering material.

Description

A kind of benching tunnelling method excavation supporting structure of weak surrounding rock large cross-section tunnel double -side approach three And construction method
Technical field
The present invention relates to a kind of tunnel support structure and construction method, more specifically to a kind of weak surrounding rock big cross section The benching tunnelling method excavation supporting structure of tunnel and Double side wall drift three and construction method, belong to technical field of tunnel construction.
Background technology
During big cross section Modelling of Tunnel Excavation in Soft Rock, traditional excavation method is CRD methods, two side-wall pilot tunnel etc.. These traditional excavation methods tend to obtain good effect in terms of excavation safety, control deformation is ensured;But temporary support compared with It is many, and tear support difficulty open, construction risk is big, and working space is narrow and small, and construction speed is slow, and construction cost is higher.
The content of the invention
It is an object of the invention to deposited for existing Support System in Soft Rock Tunnels preliminary bracing structure in the presence of high-ground stress There is provided a kind of extrusion pressing type weak surrounding rock large section is short the problems such as construction risk is larger, later stage lining quality is difficult to ensure Tunnel excavation support structure and construction method.
To achieve the above object, technical solution of the invention is:A kind of weak surrounding rock large cross-section tunnel double side wall is led Cheat three bench excavation supporting construction, including top supporting, middle part supporting and bottom supporting from top to bottom, described top supporting Including the supporting of left side wall base tunnel, mid-board supporting and right side wall base tunnel supporting, described middle part supporting includes left step supporting With step supporting in the right side, described bottom supporting includes lower-left step supporting and bottom right step supporting, described left side wall base tunnel Supporting and the supporting of right side wall base tunnel include steel arch-shelf I and temporary support respectively, and described steel arch-shelf I is provided with the advanced He of conduit I Radial grouting pipe I is provided between reinforced mesh I, steel arch-shelf I, described mid-board supporting includes steel arch-shelf II, described steel It is provided with bow member II between advanced conduit II and reinforced mesh II, steel arch-shelf II and is provided with radial grouting pipe II, a described left side Step supporting includes being provided with reinforced mesh III, steel on steel arch-shelf III, described steel arch-shelf III respectively in middle step supporting and the right side Radial grouting pipe III is provided between bow member III, described lower-left step supporting and bottom right step supporting include steel arch-shelf respectively IV, radial grouting pipe IV is provided between steel arch-shelf III.
The just long anchor of branch prestressing force is respectively arranged with the outside of described left side wall base tunnel supporting and on the outside of the supporting of right side wall base tunnel Rope and side wall prestressing force long anchor cable.
A kind of construction method of the benching tunnelling method excavation supporting structure of weak surrounding rock large cross-section tunnel double -side approach three, including under The step of face:Step one, left side wall base tunnel supporting excavation is constructed:Left side wall base tunnel is excavated using micro-explosion first and is no more than 2 Pin Steelframe distance, then installs steel arch-shelf I and closes cyclization with temporary support;Reinforced mesh I and threaded connection reinforcing bar are then installed, and Welding is firm, then applies the advanced conduit I of 4m length and radial grouting pipe I, and slip casting is full;Then the thick concrete of injection 30cm, makes It is uniform closely knit;Then in time by the first branch prestressing force long anchor cables of 12m and 18m on the outside of design attitude construction left side wall base tunnel supporting Side wall prestressing force long anchor cable locking, quincuncial arrangement, and slip casting, tensioning, anchoring are in place, make the 12m just branch prestressing force long anchor cables Design strength, the 70% of 18m sides wall prestressing force long anchor cable tensioning overall strength are stretched to step by step;Step 2, right side wall base tunnel supporting Excavation construction:The delayed left side wall base tunnel 10m of right side wall excavation with guide pit, it is used and left side wall base tunnel identical supporting in step one Measure and step;Step 3, the construction of mid-board supporting excavation:Mid-board excavates delayed left side wall base tunnel 20m, is torn open first before excavating Except anchorage, the anchor pad of the side wall prestressing force long anchor cable on the outside of left side wall base tunnel supporting in the range of excavation and right side wall base tunnel supporting Plate, releases anchoring, then using micro-explosion, excavates mid-board and is no more than 2 Pin steelframe distances, and will be exposed because mid-board is excavated The side wall prestressing force long anchor cable on the outside of the supporting of left side wall base tunnel and right side wall base tunnel supporting come arranges neat, installs steel arch-shelf II It is firm to be docked with left and right sidewall steel arch-shelf I, then installs reinforced mesh II and threaded connection reinforcing bar, and welds firm, Ran Houshi Make the advanced conduit II of 4m length and radial grouting pipe II, and slip casting is full, fill-before-fire 30cm thickness concrete, makes it uniform closely knit;Connect And cut off the lateral wall prestressing force long anchor cable additional length of median septum steel arch-shelf II, and 18m sides wall prestressing force long anchor cable is entered in time Row mends slurry, two times tensioning, and whole intensity of tensioning 18m sides wall prestressing force long anchor cable length are finally removed this section of left and right sidewall and faced When side wall and interim inverted arch;Step 4, the construction of middle part supporting excavation:The middle delayed left side wall base tunnel 25m of bench excavation, middle step core Cubsoil excavates delayed left side wall base tunnel 30m, using micro-explosion, left step supporting and it is right in step supporting stagger two Pin and middle Driving is no more than 2 Pin steelframe distances to rank Core Soil forward simultaneously, then installs steel arch-shelf III and docks jail with top bar steel arch-shelf I Lean on, reinforced mesh III and threaded connection reinforcing bar are then installed, and weld firm, then apply 4m length radial directions Grouting Pipe III, and note Slurry is full, fill-before-fire 30cm thickness concrete, makes it uniform closely knit;Step 5, the construction of bottom supporting excavation:Excavation of getting out of a predicament or an embarrassing situation is delayed Left side wall base tunnel 30m, Core Soil of getting out of a predicament or an embarrassing situation excavates delayed left side wall base tunnel 35m, and it is used and middle step identical in step 4 Supporting measure and step.
Compared with prior art, the beneficial effects of the invention are as follows:
1st, construction space is big, is conducive to personnel's plant equipment to deploy, can many scope of operation parallel constructions, construction efficiency height.
2nd, it is simple in construction, gib quantity is substantially reduce the number, gib is accordingly reduced and removes quantity, saved work Cheng Chengben, improves efficiency of construction, high financial profit.
3rd, side wall prestressing force long anchor cable intersects to mid-board supporting and locked, and has both controlled the supporting of left side wall base tunnel and right side wall The deformation of base tunnel supporting, has ensured the safety of mid-board supporting excavation again.
4th, intersect the side wall prestressing force long anchor cable that locks using mid-board and prop up two times tensioning at the beginning of arch, arch is improved rapidly The intensity of portion's supporting, has effectively resisted the sinking of arch country rock, has ensured the safety of construction, while when shortening anchor cable and applying Between, save engineering material.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
In figure, left side wall base tunnel supporting 1, mid-board supporting 3, right side wall base tunnel supporting 2, left step supporting 4, You Zhongtai Rank supporting 5, lower-left step supporting 6, bottom right step supporting 7, first branch prestressing force long anchor cable 8, side wall prestressing force long anchor cable 9, temporarily Side wall 10, interim inverted arch 11, middle step Core Soil 12, Core Soil 13 of getting out of a predicament or an embarrassing situation.
Embodiment
Below in conjunction with brief description of the drawings, the present invention is described in further detail with embodiment.
Referring to Fig. 1, a kind of bench excavation supporting construction of weak surrounding rock large cross-section tunnel double -side approach three, it is adaptable to weak Country rock big cross section rapid construction, it includes top supporting, middle part supporting and bottom supporting from top to bottom.
Referring to Fig. 1, described top supporting includes left side wall base tunnel supporting 1, mid-board supporting 3 and right side wall base tunnel supporting 2, step supporting 5 during described middle part supporting includes left step supporting 4 and be right, described bottom supporting includes lower-left step branch Shield 6 and bottom right step supporting 7.Described left side wall base tunnel supporting 1 and right side wall base tunnel supporting 2 include steel arch-shelf I and faced respectively When support, described steel arch-shelf I is provided between advanced conduit I and reinforced mesh I, steel arch-shelf I and is provided with radial grouting pipe I, And it is injected with concrete in left side wall base tunnel supporting 1 and right side wall base tunnel supporting 2.Described mid-board supporting 3 includes steel arch-shelf II, it is provided between advanced conduit II and reinforced mesh II, steel arch-shelf II on described steel arch-shelf II and is provided with radial grouting pipe Concrete is injected with II, and mid-board supporting 3.Step supporting 5 includes steel arch respectively in described left step supporting 4 and the right side It is provided with frame III, described steel arch-shelf III between reinforced mesh III, steel arch-shelf III and is provided with radial grouting pipe III;And left In rank supporting 4 and the right side concrete is injected with step supporting 5.Described lower-left step supporting 6 and bottom right step supporting 7 is wrapped respectively Include and be provided with radial grouting pipe IV between steel arch-shelf IV, steel arch-shelf III;And sprayed in lower-left step supporting 6 and bottom right step supporting 7 Concrete is penetrated.
Referring to Fig. 1, further, the described outside of left side wall base tunnel supporting 1 and the outside of right side wall base tunnel supporting 2 is set respectively It is equipped with just branch prestressing force long anchor cable 8 and side wall prestressing force long anchor cable 9.
Referring to Fig. 1, a kind of construction party of the benching tunnelling method excavation supporting structure of weak surrounding rock large cross-section tunnel double -side approach three Method, including following step:
Step one, the excavation construction of left side wall base tunnel supporting 1:Left side wall base tunnel is excavated using micro-explosion first;Drilling depth is excavated in control No more than 2 Pin steelframe distances.Then steel arch-shelf I is installed and closes cyclization with temporary support.The reinforced mesh I of Ф 8 and Ф are then installed 22 threaded connection reinforcing bars, and weld firm.The advanced conduit I of 4m length and radial grouting pipe I are applied again, and slip casting is full.Then spray 30cm thickness C25 concrete is penetrated, makes it uniform closely knit.Then in time by the 12m in the outside of design attitude construction left side wall base tunnel supporting 1 First branch prestressing force long anchor cable 8 and 18m sides wall prestressing force long anchor cable 9 lock, quincuncial arrangement, and slip casting, tensioning, anchoring are in place; Making the 12m, just branch prestressing force long anchor cable 8 is stretched to design strength step by step, 18m sides 9 tensioning overall strengths of wall prestressing force long anchor cable 70%。
Step 2, the excavation construction of right side wall base tunnel supporting 2:The delayed left side wall base tunnel 10m of right side wall excavation with guide pit, it is used With left side wall base tunnel identical supporting measure and step in step one.
Step 3, the excavation construction of mid-board supporting 3:Mid-board excavates delayed left side wall base tunnel 20m, is removed first before excavating Anchorage, the anchor pad of the side wall prestressing force long anchor cable 9 in left side wall base tunnel supporting 1 and the outside of right side wall base tunnel supporting 2 in the range of excavation Plate, releases anchoring.Then using micro-explosion excavate mid-board, control excavate drilling depth be no more than 2 Pin steelframe distances, and will because in every Wall excavates the left side wall base tunnel supporting 1 being exposed and the side wall prestressing force long anchor cable 9 in the outside of right side wall base tunnel supporting 2 is finished Whole, it is firm that installation steel arch-shelf II is docked with left and right sidewall steel arch-shelf I.Then the reinforced mesh II of Ф 8 is installed and Ф 22 is threadedly coupled Reinforcing bar, and weld firm.Then the advanced conduit II of 4m length and radial grouting pipe II are applied, and slip casting is full.Fill-before-fire 30cm is thick C25 concrete, makes it uniform closely knit.Then the additional length of II lateral wall prestressing force long anchor cable of median septum steel arch-shelf 9 is cut off.And and When benefit slurry, two times tensioning, the whole of the length of tensioning 18m sides wall prestressing force long anchor cable 9 are carried out to 18m sides wall prestressing force long anchor cable 9 Intensity.Finally remove the interim side wall of this section of left and right sidewall and interim inverted arch.
Step 4, the construction of middle part supporting excavation:The middle delayed left side wall base tunnel 25m of bench excavation, middle step Core Soil 12 is opened Delayed left side wall base tunnel 30m is dug, using micro-explosion, step supporting 5 in left step supporting 4 and the right side)Stagger two Pin and middle step Core Soil 12 is tunneled forward simultaneously, and control excavates drilling depth and is no more than 2 Pin steelframe distances.Then steel arch-shelf III and top bar steel are installed It is firm that bow member I is docked.The reinforced mesh III of Ф 8 and the threaded connection reinforcing bars of Ф 22 are then installed, and weld firm.Then 4m length is applied Radial grouting pipe III, and slip casting is full;Fill-before-fire 30cm thickness C25 concrete, makes it uniform closely knit.
Step 5, the construction of bottom supporting excavation:Got out of a predicament or an embarrassing situation the delayed left side wall base tunnel 30m of excavation, and Core Soil 13 of getting out of a predicament or an embarrassing situation is opened Delayed left side wall base tunnel 35m is dug, it is used and middle step identical supporting measure and step in step 4.
This kind of extrusion pressing type weak surrounding rock large section short tunnel excavation supporting structure and its construction method and tradition CRD The branch such as method, two side-wall pilot tunnel construction method is compared, and has been given full play to the strong locking of side wall prestressing force long anchor cable 9 and has been made With offside wall prestressing force long anchor cable 9 is segmented, two times tensioning, flexible, rapid construction, and its support reinforcement body ensures the peace of construction Entirely.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention, On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, said structure should be all considered as belonging to Protection scope of the present invention.

Claims (3)

1. a kind of bench excavation supporting construction of weak surrounding rock large cross-section tunnel double -side approach three, it is characterised in that:Including by upper And under top supporting, middle part supporting and bottom supporting, described top supporting includes left side wall base tunnel supporting(1), mid-board Supporting(3)With right side wall base tunnel supporting(2), described middle part supporting includes left step supporting(4)With step supporting in the right side (5), described bottom supporting includes lower-left step supporting(6)With bottom right step supporting(7), described left side wall base tunnel supporting (1)With right side wall base tunnel supporting(2)Include steel arch-shelf I and temporary support respectively, described steel arch-shelf I is provided with advanced conduit I With reinforced mesh I, radial grouting pipe I, described mid-board supporting are provided between steel arch-shelf I(3)It is described including steel arch-shelf II Steel arch-shelf II on be provided between advanced conduit II and reinforced mesh II, steel arch-shelf II and be provided with radial grouting pipe II, it is described Left step supporting(4)With step supporting in the right side(5)Include being provided with reinforcing bar on steel arch-shelf III, described steel arch-shelf III respectively Radial grouting pipe III, described lower-left step supporting are provided between mesh sheet III, steel arch-shelf III(6)With bottom right step supporting(7) Include being provided with radial grouting pipe IV between steel arch-shelf IV, steel arch-shelf III respectively.
2. a kind of bench excavation supporting construction of weak surrounding rock large cross-section tunnel double -side approach three according to claim 1, It is characterized in that:Described left side wall base tunnel supporting(1)Outside and right side wall base tunnel supporting(2)It is pre- that outside is respectively arranged with just branch Stress long anchor cable(8)With side wall prestressing force long anchor cable(9).
3. a kind of construction method of the benching tunnelling method excavation supporting structure of weak surrounding rock large cross-section tunnel double -side approach three, its feature exists In, including following step:
Step one, left side wall base tunnel supporting(1)Excavation construction:Left side wall base tunnel is excavated using micro-explosion first and is no more than 2 Pin steel Frame distance, then installs steel arch-shelf I and closes cyclization with temporary support;Reinforced mesh I and threaded connection reinforcing bar are then installed, and welded Connect firm, then apply the advanced conduit I of 4m length and radial grouting pipe I, and slip casting is full;Then the thick concrete of injection 30cm, makes it It is uniform closely knit;Then in time by design attitude construction left side wall base tunnel supporting(1)The first branch prestressing force long anchor cables of the 12m in outside(8) With 18m sides wall prestressing force long anchor cable(9)Locking, quincuncial arrangement, and slip casting, tensioning, anchoring are in place, branch at the beginning of making the 12m in advance should Power long anchor cable(8)Design strength, 18m sides wall prestressing force long anchor cable are stretched to step by step(9)The 70% of tensioning overall strength;
Step 2, right side wall base tunnel supporting(2)Excavation construction:The delayed left side wall base tunnel 10m of right side wall excavation with guide pit, its use with Left side wall base tunnel identical supporting measure and step in step one;
Step 3, mid-board supporting(3)Excavation construction:Mid-board excavates delayed left side wall base tunnel 20m, removes and opens first before excavating Left side wall base tunnel supporting in the range of digging(1)With right side wall base tunnel supporting(2)The side wall prestressing force long anchor cable in outside(9)Anchorage, Anchor plate, releases anchoring, then using micro-explosion, excavates mid-board and is no more than 2 Pin steelframe distances, and will be excavated cruelly because of mid-board The left side wall base tunnel supporting exposed(1)With right side wall base tunnel supporting(2)The side wall prestressing force long anchor cable in outside(9)Finish Whole, it is firm that installation steel arch-shelf II is docked with left and right sidewall steel arch-shelf I, then installs reinforced mesh II and threaded connection reinforcing bar, and Welding is firm, then applies the advanced conduit II of 4m length and radial grouting pipe II, and slip casting is full, fill-before-fire 30cm thickness concrete, Make it uniform closely knit;Then the lateral wall prestressing force long anchor cable of median septum steel arch-shelf II is cut off(9)Additional length, and in time to 18m Side wall prestressing force long anchor cable(9)Carry out benefit slurry, two times tensioning, tensioning 18m sides wall prestressing force long anchor cable(9)The whole of length is strong Degree, finally removes the interim side wall of this section of left and right sidewall and interim inverted arch;
Step 4, the construction of middle part supporting excavation:The middle delayed left side wall base tunnel 25m of bench excavation, middle step Core Soil(12)Excavate Delayed left side wall base tunnel 30m, using micro-explosion, left step supporting(4)With step supporting in the right side(5)Stagger two Pin and middle step Core Soil(12)Driving is no more than 2 Pin steelframe distances forward simultaneously, then installs steel arch-shelf III and docks jail with top bar steel arch-shelf I Lean on, reinforced mesh III and threaded connection reinforcing bar are then installed, and weld firm, then apply 4m length radial directions Grouting Pipe III, and note Slurry is full, fill-before-fire 30cm thickness concrete, makes it uniform closely knit;
Step 5, the construction of bottom supporting excavation:Get out of a predicament or an embarrassing situation the delayed left side wall base tunnel 30m of excavation, Core Soil of getting out of a predicament or an embarrassing situation(13)Excavate Delayed left side wall base tunnel 35m, it is used and middle step identical supporting measure and step in step 4.
CN201710501927.7A 2017-06-27 2017-06-27 A kind of the benching tunnelling method excavation supporting structure of weak surrounding rock large cross-section tunnel double -side approach three and construction method CN107288653A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108166979A (en) * 2017-12-01 2018-06-15 长安大学 A kind of construction method of super-span tunnel top bar two side-wall pilot tunnel
CN108397205A (en) * 2018-03-05 2018-08-14 北京市政建设集团有限责任公司 A kind of shield well transverse passage-way CRD method construction methods
CN109113749A (en) * 2018-08-20 2019-01-01 中铁建大桥工程局集团第五工程有限公司 Four line large section railway tunnel construction method of weak surrounding rock
CN109611100A (en) * 2018-11-20 2019-04-12 中铁十二局集团有限公司 A kind of tunnel middle drift bilateral Enlargement excavation method
CN110145314A (en) * 2019-05-10 2019-08-20 中建隧道建设有限公司 A kind of method that the tall and big Core Soil of extra-large cross-section bored tunnel is removed
CN110230495A (en) * 2019-05-27 2019-09-13 林同棪国际工程咨询(中国)有限公司 A kind of subway station double -side approach construction Core Soil excavation method
CN110792449A (en) * 2019-10-29 2020-02-14 凌贤长 Rapid underground excavation construction method for large-span shallow tunnel
CN110924985A (en) * 2019-12-04 2020-03-27 中铁二院贵阳勘察设计研究院有限责任公司 Long rock pillar construction method suitable for overlying thin rock stratum
CN111022060A (en) * 2019-12-26 2020-04-17 中交三公局第二工程有限公司 Single-hole excavation construction method of double-arch tunnel
CN111502675A (en) * 2020-04-29 2020-08-07 中国矿业大学(北京) Supporting method for construction of high-ground-stress weak broken surrounding rock large-section tunnel intersection

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108166979A (en) * 2017-12-01 2018-06-15 长安大学 A kind of construction method of super-span tunnel top bar two side-wall pilot tunnel
CN108397205A (en) * 2018-03-05 2018-08-14 北京市政建设集团有限责任公司 A kind of shield well transverse passage-way CRD method construction methods
CN109113749A (en) * 2018-08-20 2019-01-01 中铁建大桥工程局集团第五工程有限公司 Four line large section railway tunnel construction method of weak surrounding rock
CN109611100A (en) * 2018-11-20 2019-04-12 中铁十二局集团有限公司 A kind of tunnel middle drift bilateral Enlargement excavation method
CN109611100B (en) * 2018-11-20 2020-07-21 中铁十二局集团有限公司 Double-side expanding excavation construction method for pilot tunnel in tunnel
CN110145314A (en) * 2019-05-10 2019-08-20 中建隧道建设有限公司 A kind of method that the tall and big Core Soil of extra-large cross-section bored tunnel is removed
CN110230495A (en) * 2019-05-27 2019-09-13 林同棪国际工程咨询(中国)有限公司 A kind of subway station double -side approach construction Core Soil excavation method
CN110792449A (en) * 2019-10-29 2020-02-14 凌贤长 Rapid underground excavation construction method for large-span shallow tunnel
CN110924985A (en) * 2019-12-04 2020-03-27 中铁二院贵阳勘察设计研究院有限责任公司 Long rock pillar construction method suitable for overlying thin rock stratum
CN111022060A (en) * 2019-12-26 2020-04-17 中交三公局第二工程有限公司 Single-hole excavation construction method of double-arch tunnel
CN111502675A (en) * 2020-04-29 2020-08-07 中国矿业大学(北京) Supporting method for construction of high-ground-stress weak broken surrounding rock large-section tunnel intersection

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