CN114060040A - Horizontal T-joint construction method for directly jacking pipe into shield tunnel - Google Patents
Horizontal T-joint construction method for directly jacking pipe into shield tunnel Download PDFInfo
- Publication number
- CN114060040A CN114060040A CN202111331488.2A CN202111331488A CN114060040A CN 114060040 A CN114060040 A CN 114060040A CN 202111331488 A CN202111331488 A CN 202111331488A CN 114060040 A CN114060040 A CN 114060040A
- Authority
- CN
- China
- Prior art keywords
- pipe
- jacking
- tunnel
- shield
- shield tunnel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 35
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 239000002689 soil Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000002787 reinforcement Effects 0.000 claims abstract description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 238000009412 basement excavation Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract 1
- 230000008520 organization Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
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
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/155—Laggings made of strips, slats, slabs or sheet piles
-
- 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
-
- 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
-
- 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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Soil Sciences (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to a horizontal T-joint construction method for directly jacking a jacking pipe into a shield tunnel, which comprises the following steps: 1. performing pre-soil body reinforcement at the T-joint position of the shield pipe-jacking tunnel; 2. constructing a shield tunnel and pre-installing a steel pipe sheet, wherein the pipe sheet can be disassembled at the connection part of the two tunnels to form a reserved hole for the access of a pipe-jacking tunnel, and a water stopping device is pre-installed; 3. performing pipe jacking construction to form a pipe jacking tunnel with a smaller diameter and approach to a shield reserved hole; 4. opening a reserved hole on the shield steel pipe sheet; 5. and jacking the jacking pipe into the shield tunnel through the reserved hole. 6. The pipe jacking machine is welded with the steel pipe sheet after being cut and detached in sections; 7. the top pipe tunnel is communicated with the shield tunnel. The invention can ensure that the pipe-jacking tunnel and the shield tunnel are connected and communicated underground, avoids the construction of the working well at the connecting part, saves the cost for projects, provides a non-excavation new method for connecting tunnels in areas where the working well is not suitable to be constructed, and obtains the economic, reasonable and practical effects.
Description
Technical Field
The invention relates to a pipe jacking construction method of a shield tunnel, in particular to a horizontal T-joint construction method for directly jacking into the shield tunnel.
Background
At present, in the construction of taking drainage tunnel in city, often adopt the shield to carry out major diameter and be responsible for the construction, adopt the push pipe to carry out minor diameter branch pipe construction, because the technology needs to and the line angle is close perpendicular, need be responsible for and branch pipe linking position and carry out the working well construction, let shield and push pipe tunnel realize linking of circuit in the access well afterwards. However, with the development of cities, well locations are increasingly difficult to select, especially well locations in busy areas, which are difficult to traffic organization, and the sensitive environment around the well locations puts high demands on well location construction. If the well can not be constructed, the construction of the corresponding pipeline is influenced, and obstacles are brought to the improvement of the city. Therefore, a non-excavation construction process is needed to realize the self connection of the shield and the pipe-jacking tunnel so as to solve the problem.
Disclosure of Invention
Aiming at the current situation that no proper measures are taken to solve the connection between the shield and the pipe-jacking tunnel at present, the invention provides a specific and effective construction method for the horizontal T connection between the shield and the pipe-jacking tunnel.
In order to realize the construction purpose, the invention adopts the following technical scheme:
a horizontal T-joint construction method for directly jacking a jacking pipe into a shield tunnel comprises the following steps:
(1) performing pre-soil body reinforcement at the T-joint position of the shield pipe-jacking tunnel;
(2) performing shield tunnel construction and pre-installing a steel pipe sheet and a water stopping device;
(3) performing pipe jacking construction to form a pipe jacking tunnel with a smaller diameter and approach to a shield reserved hole;
(4) opening a reserved hole on the shield steel pipe sheet;
(5) jacking the jacking pipe into the shield tunnel through the reserved hole;
(6) the pipe jacking machine is welded with the steel pipe sheet after being cut and detached in sections;
(7) the top pipe tunnel is communicated with the shield tunnel.
Furthermore, the connecting section of the shield tunnel and the pipe jacking tunnel is spliced by using steel pipe sheets, detachable parts are reserved on the steel pipe sheets, an opening through which a pipe jacking machine can pass can be formed after the parts are detached, and a water stopping device is prefabricated on the steel pipe sheets on the periphery of the opening and used for the pipe jacking machine to enter the hole.
Further, the soil body reinforcement is carried out before the formation of the shield and the pipe-jacking tunnel, and the reinforcement area comprises the whole T-joint part of the pipe-jacking tunnel and the shield tunnel.
Furthermore, the diameter of the jacking pipe tunnel is smaller than that of the shield tunnel, so that a reserved hole on the shield tunnel pipe can form a complete circle without damaging the structural stability of the shield tunnel.
Further, the water stopping device is composed of two layers, wherein one layer is positioned on the soil facing surface outside the pipe piece, the other layer is positioned inside the pipe piece, and the two layers act together or one layer is eliminated according to the condition of an external soil layer.
Compared with the prior art, the invention has the beneficial effects that:
1. the method can effectively solve the construction problem of self connection of the shield and the pipe-jacking tunnel, and avoid project stagnation caused by difficult construction of the working well.
2. The construction process formed by the invention is a process capable of smoothly connecting the shield and the pipe-jacking tunnel, and has strong applicability and high safety.
Drawings
FIG. 1 is a schematic longitudinal sectional view of the reinforced soil and tunnel in plan view;
FIG. 2 is a schematic plan view in cross-section of a reinforced soil mass and tunnel;
FIG. 3 is a schematic plan view showing the relationship between the reinforced soil and the tunnel and the dimensions thereof;
fig. 4 is a schematic plan view of the reinforced soil body and the tunnel in the embodiment.
Detailed Description
The invention is further illustrated by the following examples. These examples are given solely for the purpose of illustration and are not intended to limit the scope of the invention, which is to be given the full breadth of the present disclosure, and any variations or modifications within the skill of the art after reading the teachings herein, may be made, and such equivalents are intended to fall within the scope of the invention as defined in the claims appended hereto.
The invention provides a horizontal T-joint construction method for directly jacking a jacking pipe into a shield tunnel, which comprises the following steps:
(1) pre-soil body reinforcement 3 is carried out at the T-joint position of the shield pipe-jacking tunnel, and the plane position relationship of the shield pipe-jacking tunnel and the reinforced soil body is shown in figures 1 and 2;
(2) constructing a shield tunnel 1 and pre-installing a steel pipe sheet, wherein the steel pipe sheet can be detached from a reserved hole at the connection part of the two tunnels to be accessed by a pipe-jacking tunnel 2, and a water stopping system is pre-installed;
(3) performing pipe jacking construction to form a pipe jacking tunnel 2 with a smaller diameter and approach the reserved tunnel opening of the shield;
(4) opening a reserved hole on the shield steel pipe sheet;
(5) jacking the jacking pipe into the shield tunnel 1 through the reserved hole;
(6) the pipe jacking machine is welded with the steel pipe sheet after being cut and detached in sections;
(7) the top pipe tunnel is communicated with the shield tunnel.
In the specific embodiment, one original DN3500mm shield pipeline 4 and one original DN2000mm top pipeline 5 of a certain project are connected into a foundation pit with the inner diameter of 13 meters and the excavation depth of 12.66 meters to serve as a working well. The surrounding environment of the well site is complex, the traffic organization is difficult, and pipelines such as rainwater pipes and cables which cannot be moved exist, so that the well site construction is very difficult. The original working well is cancelled by adopting a shield and pipe jacking T-joint process, two DN3500 shield pipelines 4 are slightly adjusted in position and combined into one, and the DN2000mm pipe jacking tunnel 5 is directly connected into the shield tunnel in a T-joint mode. The concrete construction steps are as follows:
(1) and the joint position is reinforced by adopting MJS, the reinforcing area 6 of the shield pipeline is 20m multiplied by 10.1m, the reinforcing area 7 of the pipe-jacking pipeline is 5m multiplied by 8.4m, and the whole T-joint shield and pipe-jacking tunnel area is covered. The plane position relationship and the size of the reinforced soil body and the tunnel are shown in figures 3 and 4.
(2) DN3500 shield pipeline construction is carried out, steel pipe pieces are pre-installed, reserved holes can be detachably formed in the connecting parts of the two tunnels of the pipe pieces, the pipe pieces are used for connecting the jacking tunnels, and water stopping systems are pre-installed.
(3) Performing DN2000 pipe jacking construction to form a pipe jacking tunnel with a smaller diameter, and approaching the reserved tunnel opening of the shield;
(4) opening a reserved hole on the shield steel pipe sheet;
(5) jacking the jacking pipe into the shield tunnel through the reserved hole;
(6) the pipe jacking machine is welded with the steel pipe sheet after being cut and detached in sections;
(7) the DN2000 push pipe tunnel is communicated with the DN3500 shield tunnel.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. A horizontal T-joint construction method for directly jacking a jacking pipe into a shield tunnel is characterized by comprising the following steps:
(1) performing pre-soil body reinforcement at the T-joint position of the shield pipe-jacking tunnel;
(2) performing shield tunnel construction and pre-installing a steel pipe sheet and a water stopping device;
(3) performing pipe jacking construction to form a pipe jacking tunnel with a smaller diameter and approach to a shield reserved hole;
(4) opening a reserved hole on the shield steel pipe sheet;
(5) jacking the jacking pipe into the shield tunnel through the reserved hole;
(6) the pipe jacking machine is welded with the steel pipe sheet after being cut and detached in sections;
(7) the top pipe tunnel is communicated with the shield tunnel.
2. The horizontal T-joint construction method for jacking the pipe directly into the shield tunnel according to claim 1, which is characterized in that: the connecting section of the shield tunnel and the pipe-jacking tunnel is spliced by using steel pipe pieces, detachable parts are reserved on the steel pipe pieces, an opening through which a pipe-jacking machine can pass can be formed after the parts are detached, and a water stopping device is prefabricated on the steel pipe pieces on the periphery of the opening and used for the pipe-jacking machine to enter the opening.
3. The horizontal T-joint construction method for jacking the pipe directly into the shield tunnel according to claim 1, which is characterized in that: the soil body reinforcement is carried out before the formation of the shield and the pipe-jacking tunnel, and the reinforcement area comprises the whole T-joint part of the pipe-jacking tunnel and the shield tunnel.
4. The horizontal T-joint construction method for jacking the pipe directly into the shield tunnel according to claim 1, which is characterized in that: the diameter of the jacking pipe tunnel is smaller than that of the shield tunnel, so that a reserved hole on the shield tunnel pipe sheet can form a complete circle without damaging the structural stability of the shield tunnel.
5. The horizontal T-joint construction method for jacking the pipe directly into the shield tunnel according to claim 1, which is characterized in that: the water stopping device is composed of two layers, wherein one layer is positioned on the soil facing surface outside the steel pipe sheet, the other layer is positioned inside the steel pipe sheet, and the two layers act together or one layer is eliminated according to the condition of an external soil layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111331488.2A CN114060040A (en) | 2021-11-11 | 2021-11-11 | Horizontal T-joint construction method for directly jacking pipe into shield tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111331488.2A CN114060040A (en) | 2021-11-11 | 2021-11-11 | Horizontal T-joint construction method for directly jacking pipe into shield tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114060040A true CN114060040A (en) | 2022-02-18 |
Family
ID=80274916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111331488.2A Pending CN114060040A (en) | 2021-11-11 | 2021-11-11 | Horizontal T-joint construction method for directly jacking pipe into shield tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114060040A (en) |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003064995A (en) * | 2001-08-29 | 2003-03-05 | Tokyoto Gesuido Service Kk | Construction method of shield tunnel and segment for opening part |
| JP2005139780A (en) * | 2003-11-07 | 2005-06-02 | Okumura Corp | Shield machine for branch tunnel excavation |
| JP2006152680A (en) * | 2004-11-29 | 2006-06-15 | Kumagai Gumi Co Ltd | Joining construction method for shield tunnel and structure of shield tunnel by its construction method |
| CN1916362A (en) * | 2006-09-04 | 2007-02-21 | 上海隧道工程股份有限公司 | Construction method for tunnel contact passage in shield section of underground railway |
| CN102644467A (en) * | 2012-04-27 | 2012-08-22 | 上海隧道工程股份有限公司 | Tunnel connecting passage construction method for directly cutting segment rings through pipe jacking machine |
| CN103807504A (en) * | 2014-02-28 | 2014-05-21 | 中冶天工上海十三冶建设有限公司 | Construction method of reinforced concrete jacked pipe underground T-shaped butt joint |
| CN104533434A (en) * | 2014-12-28 | 2015-04-22 | 上海隧道工程股份有限公司 | Construction method of rectangular ultra-shallow covered soil tunnel |
| CN104963693A (en) * | 2015-06-18 | 2015-10-07 | 河海大学 | Construction method for rectangular parallel top pipe connection channel |
| CN106948833A (en) * | 2017-04-05 | 2017-07-14 | 宁波大学 | Pin-connected panel service channel structure and its construction method |
| CN107975376A (en) * | 2017-10-24 | 2018-05-01 | 上海市基础工程集团有限公司 | Tunneling shield push pipe and vertical duct connection structure and construction method |
| CN207512795U (en) * | 2017-11-24 | 2018-06-19 | 中铁八局集团建筑工程有限公司 | It is a kind of to be used for basement and the steel plate water-stopping structure of outside coupling access sites |
| CN108561138A (en) * | 2018-03-30 | 2018-09-21 | 上海隧道工程有限公司 | Shield section interface channel push pipe is into hole sealed compartment and its construction method |
| CN108825269A (en) * | 2018-05-30 | 2018-11-16 | 宁波大学 | Mechanical Method service channel T socket part position adaptive waterproof construction |
| CN112253162A (en) * | 2020-11-10 | 2021-01-22 | 中铁四局集团有限公司 | A kind of reinforcement structure and construction method of large-diameter pipe jacking group inlet and outlet holes in water-rich sand layer |
| CN112343003A (en) * | 2020-10-20 | 2021-02-09 | 中亿丰建设集团股份有限公司 | Reinforcing and seepage-proofing treatment method for ultra-shallow soil covering of river bed in tunnel underpass river construction |
| CN112524335A (en) * | 2019-09-17 | 2021-03-19 | 浙江长兴市政建设有限公司 | Non-excavation jacking external branch pipe construction method |
| CN112727466A (en) * | 2021-01-29 | 2021-04-30 | 绍兴市柯桥区轨道交通集团有限公司 | Construction method for support-free prefabricated assembled type shield tunnel air shaft structure |
| CN112727470A (en) * | 2020-12-31 | 2021-04-30 | 中铁建大桥工程局集团第二工程有限公司 | Construction reinforcing method for shield tunnel at overlapped section |
-
2021
- 2021-11-11 CN CN202111331488.2A patent/CN114060040A/en active Pending
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003064995A (en) * | 2001-08-29 | 2003-03-05 | Tokyoto Gesuido Service Kk | Construction method of shield tunnel and segment for opening part |
| JP2005139780A (en) * | 2003-11-07 | 2005-06-02 | Okumura Corp | Shield machine for branch tunnel excavation |
| JP2006152680A (en) * | 2004-11-29 | 2006-06-15 | Kumagai Gumi Co Ltd | Joining construction method for shield tunnel and structure of shield tunnel by its construction method |
| CN1916362A (en) * | 2006-09-04 | 2007-02-21 | 上海隧道工程股份有限公司 | Construction method for tunnel contact passage in shield section of underground railway |
| CN102644467A (en) * | 2012-04-27 | 2012-08-22 | 上海隧道工程股份有限公司 | Tunnel connecting passage construction method for directly cutting segment rings through pipe jacking machine |
| CN103807504A (en) * | 2014-02-28 | 2014-05-21 | 中冶天工上海十三冶建设有限公司 | Construction method of reinforced concrete jacked pipe underground T-shaped butt joint |
| CN104533434A (en) * | 2014-12-28 | 2015-04-22 | 上海隧道工程股份有限公司 | Construction method of rectangular ultra-shallow covered soil tunnel |
| CN104963693A (en) * | 2015-06-18 | 2015-10-07 | 河海大学 | Construction method for rectangular parallel top pipe connection channel |
| CN106948833A (en) * | 2017-04-05 | 2017-07-14 | 宁波大学 | Pin-connected panel service channel structure and its construction method |
| CN107975376A (en) * | 2017-10-24 | 2018-05-01 | 上海市基础工程集团有限公司 | Tunneling shield push pipe and vertical duct connection structure and construction method |
| CN207512795U (en) * | 2017-11-24 | 2018-06-19 | 中铁八局集团建筑工程有限公司 | It is a kind of to be used for basement and the steel plate water-stopping structure of outside coupling access sites |
| CN108561138A (en) * | 2018-03-30 | 2018-09-21 | 上海隧道工程有限公司 | Shield section interface channel push pipe is into hole sealed compartment and its construction method |
| CN108825269A (en) * | 2018-05-30 | 2018-11-16 | 宁波大学 | Mechanical Method service channel T socket part position adaptive waterproof construction |
| CN112524335A (en) * | 2019-09-17 | 2021-03-19 | 浙江长兴市政建设有限公司 | Non-excavation jacking external branch pipe construction method |
| CN112343003A (en) * | 2020-10-20 | 2021-02-09 | 中亿丰建设集团股份有限公司 | Reinforcing and seepage-proofing treatment method for ultra-shallow soil covering of river bed in tunnel underpass river construction |
| CN112253162A (en) * | 2020-11-10 | 2021-01-22 | 中铁四局集团有限公司 | A kind of reinforcement structure and construction method of large-diameter pipe jacking group inlet and outlet holes in water-rich sand layer |
| CN112727470A (en) * | 2020-12-31 | 2021-04-30 | 中铁建大桥工程局集团第二工程有限公司 | Construction reinforcing method for shield tunnel at overlapped section |
| CN112727466A (en) * | 2021-01-29 | 2021-04-30 | 绍兴市柯桥区轨道交通集团有限公司 | Construction method for support-free prefabricated assembled type shield tunnel air shaft structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103981898B (en) | A kind of inverse underground engineering construction method done of overall open cut node | |
| CN107664035A (en) | The construction method of well after shield piping lane elder generation shield | |
| CN104060615B (en) | Newly-built foundation pit supporting construction is utilized to remove the construction method of underground obstacle | |
| CN102535441A (en) | Construction method of underground diaphragm wall | |
| CN108316354A (en) | With waterproof, the underground pipe gallery structure of drain function and its construction method | |
| CN208088344U (en) | With waterproof, the underground pipe gallery structure of drain function | |
| CN110485468B (en) | Permanent circular working well with water-rich stratum preset jacking pipe door opening and construction method thereof | |
| CN113235613B (en) | Method for excavating and supporting newly-built foundation pit by utilizing adjacent existing guard piles | |
| CN109371980B (en) | Deep foundation pit enclosure construction method combining spray anchor reverse construction and punched pile | |
| CN205206847U (en) | Shield constructs business turn over hole portal annular and freezes sealed sealing device | |
| CN110985042A (en) | Combined support system and technology of urban comprehensive pipe gallery and underground shallow buried tunnel | |
| CN110424517A (en) | A kind of underground pipe gallery construction rain sewage in urban core region is relocated construction method | |
| CN107829747B (en) | Construction method suitable for shallow-buried underground excavation tunnel in expansive soil area | |
| CN114060040A (en) | Horizontal T-joint construction method for directly jacking pipe into shield tunnel | |
| CN112726667A (en) | Semi-rigid assembly type comprehensive pipe gallery and construction method thereof | |
| CN209760299U (en) | light and shade of avoiding house to tear open and move is dug and is combined subway station structure | |
| CN114908796B (en) | Drainage type seepage water guide structure, subway station and construction method | |
| CN110485465B (en) | Circular working well with water-rich stratum with preset pipe jacking door opening and construction method of circular working well | |
| CN105133621A (en) | Construction method of foundation pit bracing system and foundation pit bracing system | |
| CN110409453A (en) | A method of the construction foundation pit below underground pipe gallery | |
| CN112343622A (en) | Method for realizing underground space trenchless construction by adopting pre-constructed permanent shell | |
| CN106193111A (en) | New subway gateway is crossed street with existing assembled and is connected design and construction method | |
| CN206448275U (en) | A kind of bracing members joint for taking into account water-stagnating effect | |
| CN220102278U (en) | Connecting pipe construction structure for connecting pipe point of raw water engineering in narrow space | |
| CN103696438A (en) | Double-amplitude type hybrid construction method for underground engineering |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |