CN107905817B - Pre-reinforcing system for ground working well advance pipe shed penetrating existing objects in shield region - Google Patents
Pre-reinforcing system for ground working well advance pipe shed penetrating existing objects in shield region Download PDFInfo
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- CN107905817B CN107905817B CN201711247909.7A CN201711247909A CN107905817B CN 107905817 B CN107905817 B CN 107905817B CN 201711247909 A CN201711247909 A CN 201711247909A CN 107905817 B CN107905817 B CN 107905817B
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- 230000000149 penetrating effect Effects 0.000 title claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 103
- 239000010959 steel Substances 0.000 claims abstract description 103
- 238000010276 construction Methods 0.000 claims abstract description 26
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 26
- 230000002787 reinforcement Effects 0.000 claims abstract description 25
- 239000007921 spray Substances 0.000 claims abstract description 8
- 238000010009 beating Methods 0.000 claims abstract description 6
- 239000004568 cement Substances 0.000 claims description 11
- 238000005553 drilling Methods 0.000 claims description 11
- 239000011378 shotcrete Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 5
- 238000013461 design Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims 1
- 230000005641 tunneling Effects 0.000 abstract 2
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 3
- 239000004567 concrete Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
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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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to a pre-reinforcing system for a ground working well advance pipe shed, which penetrates through existing objects in a shield zone, and comprises a working shaft, wherein the bottom of the working shaft is a shaft bottom plate, and the well body is a spray anchor support system; a pipe shed supporting steel frame is arranged above a shaft bottom plate at the bottom of the working shaft, a pipe shed guide pipe is arranged at the top of the pipe shed supporting steel frame, and a pipe shed is arranged in the surrounding stratum in a beating mode. Aiming at the technical problem that the important building structures of the shield tunneling cannot be subjected to in-tunnel construction for advanced support, the invention fully utilizes the convenience and flexibility of the spray anchor construction method Shi Gong for a vertical shaft and the reliability of the advanced pre-reinforcement of the greenhouse, not only is the construction convenient and the investment saved, but also the influence of the surface pre-reinforcement on the ground and the surrounding building structures is greatly reduced, and meanwhile, the overall reliability of the shield tunneling is enhanced.
Description
Technical Field
The invention belongs to the technical field of tunnel construction, and particularly relates to a pre-reinforcing system for a ground working well advance pipe shed penetrating through existing objects in a shield zone.
Background
The 21 st century is the rapid development period of underground engineering, and especially the construction of subway engineering in China is more popular in recent years. The tunnel boring machine is widely applied to subway engineering, so that some constructions are safer to be penetrated down, but for some constructions which are particularly important, irreparable influence is often caused if the reinforcing treatment measures are improper; the shield machine generally does not have a stratum pre-reinforcement function, and a common method for reinforcing the foundation of the existing building is large-scale ground drilling grouting reinforcement, but the grouting range and the reinforcement effect are affected due to the problems of setting angles, grouting pressure control and the like; meanwhile, the ground grouting needs a large-scale ground occupation, influences the surrounding environment, and has great engineering coordination difficulty. Therefore, for the safe crossing of the important building structures of the section shield tunnel, higher requirements are provided for the effective advanced pre-reinforcement of the foundation of the building structures.
Disclosure of Invention
The invention aims to provide a pre-reinforcing system for a ground working well leading pipe shed penetrating through the existing object in a shield zone, which can effectively limit foundation settlement of a building structure during the shield crossing of the building structure under the pre-reinforcing effect of the ground working well leading pipe shed in a complex environment.
The technical scheme adopted by the invention is as follows:
the utility model provides a ground work well advance pipe canopy pre-reinforcement system of existing thing is worn down in shield section which characterized in that:
the hydraulic anchor support system comprises a working vertical shaft 1, wherein the bottom of the working vertical shaft 1 is a vertical shaft bottom plate 5, and a blowout anchor support system 4 is arranged in a well body;
a pipe shed supporting steel frame 6 is arranged above a shaft bottom plate 5 at the bottom of the working shaft 1, a pipe shed guide pipe 7 is arranged at the top of the pipe shed supporting steel frame 6, and a pipe shed 2 is arranged in the surrounding stratum in a beating mode.
The outer wall of the top of the working vertical shaft 1 is provided with a locking collar beam 3.
The pipe shed 2 is a seamless steel pipe, a small steel reinforcement cage is arranged inside the pipe shed, the small steel reinforcement cage comprises a hoop 13 in the center, and an inserted steel reinforcement 11 and a positioning bracket ring 12 are arranged on the periphery of the hoop 13.
The pipe shed support steel frame 6 consists of a cross beam 9 and a vertical support 10;
the bottom beam is based on a vertical shaft bottom plate 5, the top beam provides a carrier for a pipe shed guide steel pipe 7, and a vertical support 10 is arranged between the top beam and the bottom beam.
One end of the pipe shed guide steel pipe 7 is arranged on the pipe shed support steel frame 6, is welded with the top beam 9 of the pipe shed support steel frame 6 in double-sided manner, and the other end is driven into the side wall of the working vertical shaft 1.
The shotcrete support system 4 comprises an advanced anchor pipe, a steel grid, a reinforcing mesh and shotcrete.
The construction method of the pre-reinforcing system of the ground working well advance pipe shed for penetrating existing objects under the shield zone is characterized by comprising the following steps:
the method comprises the following steps:
step one: excavating a working shaft ring beam foundation pit, and constructing a locking ring beam 3; constructing a working shaft 1 by adopting a reverse construction method, and applying a spray anchor support system 4 after each time a shaft foundation pit is excavated by 0.5-1 m; after the shaft foundation pit is excavated to the bottom, a shaft bottom plate 5 is manufactured;
step two: after the vertical shaft bottom plate 5 reaches the design strength, a pipe shed is arranged on one side of the vertical shaft bottom plate and is tightly attached to the side wall of the vertical shaft to form a pipe shed supporting steel frame 6; the bottom cross beam 9 of the pipe shed support steel frame 6 is necessarily connected with the vertical shaft bottom plate 5 so as to ensure the stability of the support steel frame 6; after the pipe shed support steel frame 6 is installed in place, pipe shed guide steel pipes 7 are arranged in the side wall of the vertical shaft at equal intervals along the upper edge of the top cross beam 9, and the guide steel pipes 7 and the top cross beam 9 are firmly welded;
step three: drilling along the pipe shed guide steel pipe 7, then drilling and arranging a pipe shed 2 steel pipe, and putting a small steel reinforcement cage into the steel pipe according to the condition of building a structure above to improve the overall rigidity of the pipe shed 2; filling cement paste into the pipe shed 2 to fill the steel pipes and reinforcing the peripheral stratum;
step four: and after the construction of the pipe shed 2 is finished, the working vertical shaft 1 is backfilled in time, so that the safety of the surrounding environment during the shield crossing is ensured.
The invention has the following advantages:
according to the invention, a working vertical shaft is excavated on the earth surface, a pipe shed supporting steel frame is arranged in the shaft, a pipe shed guide pipe is arranged, a pipe shed is arranged in a beating mode, a steel reinforcement cage is inserted into the steel pipe, cement paste is injected into the steel pipe to form a pipe shed pre-reinforcing system, and related mechanical equipment used for spraying concrete, steel, cement paste, arranging the steel pipe and the like are all conventional materials (equipment), and the corresponding size is of a conventional type, so that the processing and the manufacturing are convenient; the length and the plane arrangement of the steel pipes of the pipe shed can be adjusted according to the spatial relative position relation between the tunnel and the building, the rigidity of the pipe shed can be comprehensively determined according to the cement paste level filled in the pipe shed and the rigidity condition of the steel reinforcement cage and the steel pipes, and the safety of the surrounding environment during the process that the shield tunnel passes through the building can be ensured through a pre-reinforcing system of the advanced pipe shed. The position of the working well can be flexibly selected according to the position of the building to be reinforced, the ground and the underground condition, the adverse effects of occupying the ground and changing the pipeline are avoided as much as possible, the defects of difficult foundation pre-reinforcement construction, poor effect and small range of the important building under the shield zone are effectively overcome, and the working well has higher economic and social benefits and wide application prospects in the projects of urban rail transit, railways, highways and the like.
Drawings
Fig. 1 is a schematic view of a shaft support structure and a pipe shed (plane).
Fig. 2 is a schematic view of a cross section (elevation) of a shaft support structure.
FIG. 3 is a schematic cross-sectional view of a pipe shed.
In the figure, a working vertical shaft, a 2-pipe shed, a 3-locking collar beam, a 4-spray anchor support system, a 5-vertical shaft bottom plate, a 6-pipe shed support steel frame, a 7-pipe shed guide pipe, an 8-seamless steel pipe, a 9-cross beam, a 10-vertical support, an 11-inserted steel bar, a 12-positioning support ring and a 13-hoop are arranged.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
According to the pre-reinforcing system for the advanced pipe shed of the ground working well, the pipe shed guide pipes are arranged on the side wall of the anchor support of the working shaft in a drilling mode, the pipe shed guide pipes are welded with the pipe shed support positioning steel frame, the pipe shed grouting steel pipes are arranged along the pipe shed guide pipes in a beating mode, the steel reinforcement cages are arranged in the pipe shed steel pipes, cement paste is injected in a pressing mode, the pre-reinforcing system for the pipe shed is formed, and safety of surrounding environments during the period that a shield tunnel passes through a built structure is guaranteed.
The concrete structure comprises a working vertical shaft 1, wherein the bottom of the working vertical shaft 1 is a vertical shaft bottom plate 5, and the well body is a spray anchor support system 4; a pipe shed supporting steel frame 6 is arranged above a shaft bottom plate 5 at the bottom of the working shaft 1, a pipe shed guide pipe 7 is arranged at the top of the pipe shed supporting steel frame 6, and a pipe shed 2 is arranged in the surrounding stratum in a beating mode. The working shaft 1 provides a horizontal setting condition for the pipe shed 2. The working shaft 1 should be arranged at a position with good ground conditions, less influence on traffic and no influence on the safety of the building to be protected, and should avoid the position right above the shield zone. The shotcrete support system 4 comprises an advanced anchor pipe, a steel grid, a reinforcing mesh and shotcrete. The shaft floor 5 is typically constructed of cast-in-place reinforced concrete to enhance the floor load-bearing capacity.
The working shaft 1 is generally constructed by adopting an anchor spraying construction method, and the outer wall of the top of the working shaft 1 is provided with a locking collar beam 3. And a pipe shed support steel frame 6 is arranged on one side of the pipe shed and clings to the side wall of the vertical shaft, so as to support the pipe shed 2. And a pipe shed guide steel pipe 7 is welded on the pipe shed positioning steel frame 6 to play a role in positioning the pipe shed 2.
The pipe shed 2 is a seamless steel pipe, and needs to be arranged from the pipe shed guide steel pipe 7 into the stratum so as to improve the arranging precision and grouting the inside of the pipe; the inside can set up small-size steel reinforcement cage, improves pipe canopy 2 rigidity, and small-size steel reinforcement cage includes the hoop 13 of central authorities, and hoop 13 periphery is provided with interpolation reinforcing bar 11 and locating support ring 12.
The pipe shed support steel frame 6 consists of a cross beam 9 and a vertical support 10, and is generally made of section steel; the bottom beam is based on a vertical shaft bottom plate 5, the top beam provides a carrier for a pipe shed guide steel pipe 7, and a vertical support 10 is arranged between the top beam and the bottom beam. Besides the two ends of the cross beam 9 are required to be provided with vertical supports 10, the middle part can be additionally provided with the vertical supports 10 according to the length of the cross beam 9 so as to shorten the span of the cross beam and reduce the integral deformation of the pipe shed. One end of the pipe shed guide steel pipe 7 is arranged on the pipe shed support steel frame 6, is welded with the top cross beam 9 of the pipe shed support steel frame 6 in double-sided mode, and the other end of the pipe shed guide steel pipe is driven into the side wall of the working vertical shaft 1 and avoids the steel grating in the side wall anchor spraying support system 4.
The ground working well advance pipe shed pre-reinforcing system for penetrating existing objects under the shield zone has the following structural characteristics:
the working vertical shaft 1 is provided with the pipe shed guide pipe 7 on the side wall of the spray anchor support, the pipe shed guide pipe 7 is welded with the pipe shed support positioning steel frame 6 to realize accurate positioning, and meanwhile, the hole drilling gap is effectively sealed and filled, so that the pipe shed guide pipe 7 is effectively fixed, and the setting precision of the pipe shed 2 is ensured. And (3) arranging the pipe shed 2 along the pipe shed guide pipe 7, drilling grouting holes on grouting steel pipes of the pipe shed 2, and pressing grouting cement paste to strengthen surrounding strata. The diameter of the pipe shed guide pipe 7 is 180mm, the wall thickness is 6mm, the length is 500mm, the pipe shed guide pipe 7 is strictly positioned, the deflection of the pipe shed 2 is measured frequently by adopting a horizontal inclinometer in the drilling process of the pipe shed 2, and when the deflection value exceeds the design requirement, the deviation is corrected in time; the circumferential center distance of the steel pipe is 400mm, the external insertion angle is about 1-2 degrees, the steel pipe is a seamless steel pipe with the diameter of 159mm and the wall thickness of 6mm, and the steel pipe is installed in sections. The grouting holes on the grouting steel pipe have the aperture of 10mm and the hole spacing of 200mm, are arranged in a plum blossom shape, and the 2m position of the tail (orifice section) of the steel pipe does not drill an orifice to be used as a slurry section. Grouting slurry adopts cement slurry, and primary parameters are as follows: cement slurry water cement ratio of 0.8:1-1:1, grouting pressure: the method adopts 0.2-0.4 MPa, and related construction parameters are determined through experiments according to actual geological conditions in construction.
The construction method of the pre-reinforcing system of the ground working well advance pipe shed for penetrating existing objects under the shield zone is characterized by comprising the following steps of:
the method comprises the following steps:
step one: excavating a working shaft ring beam foundation pit, and constructing a locking ring beam 3; constructing a working shaft 1 by adopting a reverse construction method, and applying a spray anchor support system 4 after each time a shaft foundation pit is excavated by 0.5-1 m; after the shaft foundation pit is excavated to the bottom, a shaft bottom plate 5 is manufactured;
step two: after the vertical shaft bottom plate 5 reaches the design strength, a pipe shed is arranged on one side of the vertical shaft bottom plate and is tightly attached to the side wall of the vertical shaft to form a pipe shed supporting steel frame 6; the bottom cross beam 9 of the pipe shed support steel frame 6 is necessarily connected with the vertical shaft bottom plate 5 so as to ensure the stability of the support steel frame 6; after the pipe shed support steel frame 6 is installed in place, pipe shed guide steel pipes 7 are arranged in the side wall of the vertical shaft at equal intervals along the upper edge of the top cross beam 9, and the guide steel pipes 7 and the top cross beam 9 are firmly welded;
step three: drilling along the pipe shed guide steel pipe 7, then drilling and arranging a pipe shed 2 steel pipe, and putting a small steel reinforcement cage into the steel pipe according to the condition of building a structure above to improve the overall rigidity of the pipe shed 2; filling cement paste into the pipe shed 2 to fill the steel pipes and reinforcing the peripheral stratum;
step four: and after the construction of the pipe shed 2 is finished, the working vertical shaft 1 is backfilled in time, so that the safety of the surrounding environment during the shield crossing is ensured.
The pre-reinforcing system of the advanced pipe shed of the ground working well has the characteristics of flexibility, changeability, strong adaptability, safety, reliability and the like, and effectively solves the defects of difficult reinforcement, poor effect and small range of the foundation of the building when the important building is penetrated down in the shield zone. The safety of the surrounding environment when the tunnel passes through the building structure can be ensured through the pipe shed pre-reinforcement system, and the engineering risk is reduced.
The content of the invention is not limited to the examples listed, and any equivalent transformation to the technical solution of the invention that a person skilled in the art can take on by reading the description of the invention is covered by the claims of the invention.
Claims (6)
1. The construction method of the pre-reinforcing system of the ground working well advance pipe shed for penetrating existing objects under the shield zone is characterized by comprising the following steps:
the reinforcement system comprises a working shaft (1), a shaft bottom plate (5) is arranged at the bottom of the working shaft (1), and a blowout anchor support system (4) is arranged in the shaft body;
a pipe shed supporting steel frame (6) is arranged above a shaft bottom plate (5) at the bottom of the working shaft (1), a pipe shed guiding steel pipe (7) is arranged at the top of the pipe shed supporting steel frame (6), and a pipe shed (2) is arranged in a surrounding stratum in a beating mode;
the construction method comprises the following steps:
step one: excavating a working shaft ring beam foundation pit, and constructing a locking ring beam (3); constructing a working shaft (1) by adopting a reverse construction method, and applying a spray anchor support system (4) after each time of 0.5m-1m of a shaft foundation pit is excavated; after the shaft foundation pit is excavated to the bottom, a shaft bottom plate (5) is manufactured;
step two: after the vertical shaft bottom plate (5) reaches the design strength, a pipe shed support steel frame (6) is constructed by tightly clinging one side of the pipe shed to the side wall of the vertical shaft; the bottom cross beam (9) of the pipe shed support steel frame (6) is necessarily connected with the vertical shaft bottom plate (5) so as to ensure the stability of the pipe shed support steel frame (6); after the pipe shed support steel frame (6) is installed in place, pipe shed guide steel pipes (7) are arranged in the side wall of the vertical shaft at equal intervals along the upper edge of the top cross beam (9), and the pipe shed guide steel pipes (7) and the top cross beam (9) are firmly welded;
step three: drilling along a pipe shed guide steel pipe (7), then drilling a steel pipe of the pipe shed (2), and putting a small steel reinforcement cage into the steel pipe according to the condition of building a structure above to improve the overall rigidity of the pipe shed (2); filling steel pipes with cement slurry and reinforcing peripheral stratum;
step four: and after the construction of the pipe shed (2) is finished, the working vertical shaft (1) is backfilled in time, so that the safety of the surrounding environment during the shield crossing is ensured.
2. The construction method of the pre-reinforcing system for the ground working well leading pipe shed for the existing object to penetrate under the shield zone according to claim 1, which is characterized by comprising the following steps:
the outer wall of the top of the working vertical shaft (1) is provided with a locking collar beam (3).
3. The construction method of the pre-reinforcing system for the ground working well leading pipe shed for the existing object to penetrate under the shield zone according to claim 1, which is characterized by comprising the following steps:
the pipe shed (2) is seamless steel pipe, is internally provided with a small-sized steel reinforcement cage, and the small-sized steel reinforcement cage comprises a central hoop (13), and an interpolation steel reinforcement (11) and a positioning bracket ring (12) are arranged on the periphery of the hoop (13).
4. The construction method of the pre-reinforcing system for the ground working well leading pipe shed for the existing object to penetrate under the shield zone according to claim 1, which is characterized by comprising the following steps:
the pipe shed supporting steel frame (6) consists of a cross beam (9) and a vertical support (10);
the bottom beam is based on a vertical shaft bottom plate (5), the top beam provides a carrier for a pipe shed guide steel pipe (7), and a vertical support (10) is arranged between the top beam and the bottom beam.
5. The construction method of the pre-reinforcing system for the ground working well leading pipe shed for the existing object under the shield zone according to claim 4, which is characterized by comprising the following steps:
one end of a pipe shed guide steel pipe (7) is arranged on the pipe shed support steel frame (6), is welded with the top cross beam (9) of the pipe shed support steel frame (6) in double-sided manner, and the other end of the pipe shed guide steel pipe is driven into the side wall of the working vertical shaft (1).
6. The construction method of the pre-reinforcing system for the ground working well leading pipe shed for the existing object to penetrate under the shield zone according to claim 1, which is characterized by comprising the following steps:
the shotcrete support system (4) comprises an advanced anchor pipe, a steel grid, a reinforcing steel mesh and shotcrete.
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| CN201711247909.7A CN107905817B (en) | 2017-12-01 | 2017-12-01 | Pre-reinforcing system for ground working well advance pipe shed penetrating existing objects in shield region |
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| CN201711247909.7A CN107905817B (en) | 2017-12-01 | 2017-12-01 | Pre-reinforcing system for ground working well advance pipe shed penetrating existing objects in shield region |
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| CN107905817B true CN107905817B (en) | 2023-06-23 |
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| CN109252876B (en) * | 2018-06-26 | 2024-05-10 | 中铁五局集团贵州工程有限公司 | Advance little pipe angle positioner |
| CN110067561A (en) * | 2019-04-26 | 2019-07-30 | 中铁二十三局集团有限公司 | Under wear both wired Urban Underground mining sectbn construction methods |
| CN111502674A (en) * | 2020-04-24 | 2020-08-07 | 中国十九冶集团有限公司 | Advanced support structure and construction method for shallow-buried underground tunnel in water-rich and impurity-filled soil area |
| CN112031778B (en) * | 2020-09-11 | 2023-02-03 | 北京住总集团有限责任公司 | Construction method for shaft excavation based on multi-angle pre-reinforcement |
| CN114876474B (en) * | 2022-05-26 | 2024-04-30 | 中铁第一勘察设计院集团有限公司 | Construction method for expanding and excavating shield well structure by mine method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2824479B2 (en) * | 1990-05-11 | 1998-11-11 | 中部電力株式会社 | Starting shaft structure in shield method |
| CN102900100B (en) * | 2012-10-26 | 2014-10-22 | 岩土科技股份有限公司 | Method for building underground room under old building by using pipe sheds |
| CN102953739B (en) * | 2012-10-26 | 2015-05-06 | 中铁二十二局集团第六工程有限公司 | Bidirectional punching method for underground excavation of subway station |
| CN205276324U (en) * | 2015-12-31 | 2016-06-01 | 中国水电建设集团十五工程局有限公司 | Push pipe work well |
| CN105587320B (en) * | 2016-01-29 | 2018-07-17 | 中铁第一勘察设计院集团有限公司 | Rich water sand-pebble layer abnormal shape deep shaft structural system and its construction method |
| CN207609428U (en) * | 2017-12-01 | 2018-07-13 | 中铁第一勘察设计院集团有限公司 | The ground handling well Shed-pipe Advanced Support pre-add solid system of existing object is worn under shield section |
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