CN111502708A - Reinforcing construction method for existing tunnel transverse passage by shield underpass - Google Patents
Reinforcing construction method for existing tunnel transverse passage by shield underpass Download PDFInfo
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- CN111502708A CN111502708A CN202010438474.XA CN202010438474A CN111502708A CN 111502708 A CN111502708 A CN 111502708A CN 202010438474 A CN202010438474 A CN 202010438474A CN 111502708 A CN111502708 A CN 111502708A
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- shield
- existing tunnel
- transverse passage
- vertical shaft
- embedded
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- 238000010276 construction Methods 0.000 title claims abstract description 33
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 42
- 239000010959 steel Substances 0.000 claims abstract description 42
- 230000000903 blocking effect Effects 0.000 claims abstract description 19
- 230000035515 penetration Effects 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims description 17
- 238000009412 basement excavation Methods 0.000 claims description 8
- 230000005641 tunneling Effects 0.000 claims description 8
- 230000002787 reinforcement Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 6
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Images
Classifications
-
- 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
- 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
-
- 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
- E21D11/152—Laggings made of grids or nettings
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to the field of urban tunnel construction, in particular to a reinforcing construction method for an existing tunnel transverse passage by downward penetration of a shield, which comprises the steps of arranging a vault support device on a first upper step of a vertical shaft transverse passage to serve as an initial support, constructing a temporary plugging wall at the terminal of an excavated part of a first lower step, and constructing a plugging wall support structure on the temporary plugging wall to play roles of protecting and isolating the vertical shaft transverse passage; the vault support device comprises an arch connecting steel frame embedded on the vault of the vertical shaft transverse passage, a cross-brace steel beam embedded on the upper surface of a first upper step of the vertical shaft transverse passage, and a plurality of vertical support beams connecting the arch connecting steel frame and the cross-brace steel beam; the blocking wall supporting structure comprises an embedded member embedded in the temporary blocking wall, a positioning groove formed in the second step and a T-shaped fixing rib for connecting the positioning groove and the embedded member, and the T-shaped fixing rib forms a triangular structure with the temporary blocking wall and the positioning groove in the length extending direction.
Description
Technical Field
The invention relates to the field of urban tunnel construction, in particular to a method for reinforcing the existing mine tunnel transverse channel which is partially excavated by downward penetration of a shield.
Background
With the rapid development of economy in China, underground rail transit develops more and more rapidly, in urban underground rail transit construction engineering in China, different construction methods are adopted according to geological conditions, shield construction is usually adopted in long and large standard section tunnels, and mine construction is generally adopted in certain large-section and variable-section sections, because the mine construction method has low construction efficiency and high shield construction progress, the construction condition of 'first tunnel and then mine' is inevitably adopted, under the condition, only the excavation part of the mine tunnel can be reinforced firstly to ensure that the shield passes safely, and the situation that the shield passes through the existing tunnel in a short distance even can occur in part of places, and when the shield passes through the tunnel, larger shearing force can be generated on peripheral soil bodies or rock masses, so that the existing tunnel is easily influenced, and the risk of the shield on the mine tunnel is reduced, only the excavation part of the mine tunnel can be reinforced first to ensure that the shield can pass safely; a shield-over-mine tunnel construction method is a composite construction method for solving the difficult problem of shield construction of hard rock tunnel, and combines the shield method with the mine method, i.e. firstly adopting the mine method to construct the initial support of the tunnel, then the shield machine air-pushes the tunnel through the mine method to assemble the segments, and the holes between the segments and the primary support are filled with back filling materials such as pea gravel, cement paste and the like.
Disclosure of Invention
In order to solve the problems, the invention aims to disclose the field of urban tunnel construction, and particularly relates to a reinforcing construction method for an existing tunnel transverse passage by downward penetration of a shield.
In order to achieve the purpose, the invention adopts the technical scheme that: the reinforcement construction method for the existing tunnel transverse passage by the downward penetration of the shield comprises a shield machine and a vertical shaft transverse passage, and the reinforcement construction method is used for reinforcing the existing tunnel transverse passage when the shield machine penetrates the existing tunnel transverse passage of the mining method which is partially excavated, and comprises the following steps:
(1) construction preparation: confirming structural characteristics in an existing tunnel transverse channel, wherein the existing tunnel transverse channel is a vertical shaft transverse channel, the vertical shaft transverse channel is divided into three parts from top to bottom for excavation, the three parts comprise a first part, a second part and a third part, the first part comprises a first upper step and a first lower step, the second part comprises a second step, and the third part comprises a third step; the excavated finished length of the first upper step is greater than the excavated finished length of the first lower step, the excavated finished lengths of the first lower step and the second step are consistent, the unearthed lengths of the first lower step and the second step are greater than 10m, and the shield tunneling machine penetrates through the first lower step of the first part;
(2) constructing a vertical shaft transverse passage before the shield tunneling machine is penetrated downwards:
21) arranging a vault supporting device as an initial support at a first upper step of a vertical shaft transverse passage;
22) constructing a temporary plugging wall at the terminal of the excavated part of the first lower step;
23) constructing a supporting structure of the plugging wall on the temporary plugging wall;
the dome supporting device includes: the device comprises an arch connecting steel frame embedded in the vault of a vertical shaft transverse passage, a cross-brace steel beam embedded in the upper surface of a first upper step of the vertical shaft transverse passage, and a plurality of vertical supporting beams connecting the arch connecting steel frame and the cross-brace steel beam; chiseling primary support concrete on the vault surface of the vertical shaft transverse passage and the upper surface of the first upper step, exposing the pre-embedded arch connecting steel frame and the cross-brace steel beam, and respectively welding two ends of the vertical support beam on the arch connecting steel frame and the cross-brace steel beam;
the plugging wall supporting structure includes: the temporary plugging wall comprises an embedded component embedded in the temporary plugging wall, a positioning groove arranged on the second step and a T-shaped fixing rib connecting the positioning groove and the embedded component, wherein the T-shaped fixing rib forms a triangular structure with the temporary plugging wall and the positioning groove in the length extending direction.
Preferably, the arch crown supporting devices are arranged in the length direction of the first upper step, one arch crown supporting device of every two arch crown supporting devices is provided with a group of inclined supporting beam groups, each group of inclined supporting beam groups is provided with a plurality of inclined supporting beams, and the inclined supporting beams are correspondingly connected to the vertical supporting beams.
Preferably, the positioning groove is formed in the upper surface of the second step and is a rectangular groove or a triangular groove.
Preferably, a concrete reinforcing layer is arranged on the upper surface of the first upper step.
Preferably, the T-shaped fixing ribs comprise a cross rod and a vertical rod which are connected in an integrated mode, wherein the cross rod is connected with the positioning groove, and one end, far away from the cross rod, of the vertical rod is connected with the embedded component.
Preferably, the vertical support beams are made of 22a I-steel, and the transverse distance is 1 m.
Preferably, the inclined support beams are made of C22 steel bars, and the longitudinal distance is 0.5 m.
Preferably, the embedded members of the blocking wall supporting structure are 22a I-steel.
Preferably, the temporary plugging wall comprises a double-layer reinforcing steel bar net piece and an outer sealing layer covering the outer surface of the double-layer reinforcing steel bar net piece, the outer sealing layer is a concrete structure layer sprayed on the outer surface of the double-layer reinforcing steel bar net piece, and the thickness of the temporary plugging wall is 30 cm.
The invention has the beneficial effects that: the invention provides a reinforcing construction method for an existing tunnel transverse passage by downward penetration of a shield, which plays a role in protecting and isolating the existing tunnel transverse passage by arranging a vault supporting device, a temporary blocking wall and a blocking wall supporting structure in the existing tunnel transverse passage, reduces the possibility of instability or ground settlement of the existing tunnel transverse passage structure caused by extrusion in the downward penetration and propulsion process of the shield machine, and reduces the construction risk.
Drawings
Fig. 1 is a schematic longitudinal section of a conventional tunnel cross passage of the present invention.
Fig. 2 is a schematic view of the overall structure of the existing tunnel cross passage of the present invention.
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention.
Reference is made to the accompanying drawings in which:
1-shield tunneling machine, 2-vertical shaft cross passage, 3-vault supporting device, 4-temporary blocking wall, 5-blocking wall supporting structure, 6-first part, 7-second part, 8-third part, 31-arch connecting steel frame, 32-cross bracing steel beam, 33-vertical supporting beam, 34-inclined supporting beam, 35-concrete reinforcing layer, 51-embedded member, 52-positioning groove, 53-T-shaped fixing rib, 61-first upper step, 62-first lower step, 71-second step and 81-third step.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings:
the invention provides a reinforcement construction method for an existing tunnel transverse passage by downward penetration of a shield, which comprises a shield machine 1 and a vertical shaft transverse passage 2, wherein the reinforcement construction method is used for reinforcing the existing tunnel transverse passage when the shield penetrates the existing tunnel transverse passage of a mine method which is partially excavated, and comprises the following steps:
(1) construction preparation: confirming structural characteristics in an existing tunnel transverse channel, wherein the existing tunnel transverse channel is a vertical shaft transverse channel 2, the vertical shaft transverse channel 2 is divided into three parts from top to bottom for excavation, the three parts comprise a first part 6, a second part 7 and a third part 8, the first part 6 comprises a first upper step 61 and a first lower step 62, the second part 7 comprises a second step 71, and the third part 8 comprises a third step 81; the first upper step 61 is excavated, the excavated length of the first upper step is greater than the excavated length of the first lower step 62, the excavated lengths of the first lower step 62 and the second lower step 71 are consistent, the unearthed lengths of the first lower step 62 and the second lower step 71 are greater than 10m, and the shield tunneling machine 1 penetrates through the first lower step 62 of the first part 6;
(2) before the shield machine 1 is penetrated, the construction is carried out on the vertical shaft transverse passage 2:
21) arranging a vault supporting device 3 as an initial support at a first upper step 61 of the vertical shaft transverse passage 2;
22) constructing a temporary plugging wall 4 at the end of the excavated part of the first lower step 62;
23) constructing a plugging wall supporting structure 5 on the temporary plugging wall 4;
the vault support 3 comprises: the system comprises an arch connecting steel frame 31 pre-embedded on the arch crown of a shaft transverse passage 2, a cross-brace steel beam 32 pre-embedded on the upper surface of a first upper step 61 of the shaft transverse passage 2, and a plurality of vertical supporting beams 33 connecting the arch connecting steel frame 31 and the cross-brace steel beam 32; during construction, chiseling primary concrete on the surface of the vault of the vertical shaft transverse passage 2 and the upper surface of the first upper step 61, exposing the pre-embedded arch connecting steel frame 31 and the cross-brace steel beam 32, respectively welding two ends of the vertical supporting beam 33 on the arch connecting steel frame 31 and the cross-brace steel beam 32 to reinforce the connection of the vertical shaft transverse passage 2 and the first upper step 61, and then pouring a C25 concrete reinforcing layer 35 with the thickness of 20cm on the upper surface of the first upper step 61;
a plurality of arch crown supporting devices 3 are arranged along the length direction of the first upper step 61, one arch crown supporting device 3 in every two arch crown supporting devices 3 is provided with a group of inclined supporting beams 34, a plurality of inclined supporting beams 34 are arranged in each group of inclined supporting beams 34, and the inclined supporting beams 34 are correspondingly connected to the vertical supporting beams 33;
in this embodiment, the vertical support beams 33 are made of 22a h-beams, the transverse spacing is 1m, the inclined support beams 34 are made of C22 steel bars, and the longitudinal spacing is 0.5 m;
the blocking wall supporting structure 5 comprises an embedded member 51 embedded in the temporary blocking wall 4, a positioning groove 52 arranged on a second step 71 and a T-shaped fixing rib 53 connecting the positioning groove 52 and the embedded member 51, wherein the T-shaped fixing rib 53, the temporary blocking wall 4 and the positioning groove 52 form a triangular structure in the length extension direction, the positioning groove 52 is arranged on the upper surface of the second step 71, the positioning groove 52 is a cuboid groove or a triangular groove, preferably, the positioning groove 52 is arranged at the position of 42.5m of the temporary blocking wall, a foundation groove with the length of × m, the width of × m to the height of 500 × 100 × 50cm is excavated to serve as a supporting foundation of the T-shaped fixing rib 53,
the T-shaped fixing ribs 53 comprise a cross rod and a vertical rod which are integrally connected, wherein the cross rod is connected with the positioning groove 52, and one end of the vertical rod, which is far away from the cross rod, is connected with the embedded component 51; in this embodiment, the embedded member 51 of the blocking wall supporting structure 5 is 22a i-steel;
in the embodiment, the design size of the vertical shaft transverse passage 2 is × in length, × in width and 37 × 5 × 12.5.5 m, the vertical shaft transverse passage is excavated in three parts, a shield machine 1 excavates phi 6.28m and assembles phi 6m by adopting a construction method of shield tunneling first and expanding excavation later, a first upper step 61 is 2.55m in height and 37m in excavated length, a first lower step 62 and a second step 71 are excavated to 24m, a temporary blocking wall 4 is constructed at the end of the excavated part of the first lower step 62 and the second step 71, the temporary blocking wall 4 is arranged 5.3m away from the excavation surface of the shield machine, a transverse bracing steel beam 32 is pre-embedded on the upper surface of the first upper step 61, the temporary blocking wall 4 comprises double-layer reinforcing steel mesh sheets and an outer sealing layer covering the outer surfaces of the double-layer reinforcing steel mesh sheets, the outer sealing layer is a concrete structure layer sprayed on the outer surfaces of the double-layer reinforcing steel mesh sheets, and the thickness of the temporary blocking wall 4 is 30 cm.
The above embodiments are only preferred embodiments of the present invention, and not intended to limit the technical scope of the present invention, and those skilled in the art may make modifications and variations within the spirit of the present invention, and all modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (9)
1. The reinforcement construction method for the existing tunnel transverse passage by the downward penetration of the shield comprises a shield machine and a vertical shaft transverse passage, and is characterized in that the reinforcement construction method reinforces the existing tunnel transverse passage when the shield machine penetrates the existing tunnel transverse passage of the mine method which finishes partial excavation, and the reinforcement construction method comprises the following steps:
(1) construction preparation: confirming structural characteristics in an existing tunnel transverse channel, wherein the existing tunnel transverse channel is a vertical shaft transverse channel, the vertical shaft transverse channel is divided into three parts from top to bottom for excavation, the three parts comprise a first part, a second part and a third part, the first part comprises a first upper step and a first lower step, the second part comprises a second step, and the third part comprises a third step; the excavated finished length of the first upper step is greater than the excavated finished length of the first lower step, the excavated finished lengths of the first lower step and the second step are consistent, the unearthed lengths of the first lower step and the second step are greater than 10m, and the shield tunneling machine penetrates through the first lower step of the first part;
(2) constructing a vertical shaft transverse passage before the shield tunneling machine is penetrated downwards:
21) arranging a vault supporting device as an initial support at a first upper step of a vertical shaft transverse passage;
22) constructing a temporary plugging wall at the terminal of the excavated part of the first lower step;
23) constructing a supporting structure of the plugging wall on the temporary plugging wall;
the dome supporting device includes: the device comprises an arch connecting steel frame embedded in the vault of a vertical shaft transverse passage, a cross-brace steel beam embedded in the upper surface of a first upper step of the vertical shaft transverse passage, and a plurality of vertical supporting beams connecting the arch connecting steel frame and the cross-brace steel beam; chiseling primary support concrete on the vault surface of the vertical shaft transverse passage and the upper surface of the first upper step, exposing the pre-embedded arch connecting steel frame and the cross-brace steel beam, and respectively welding two ends of the vertical support beam on the arch connecting steel frame and the cross-brace steel beam;
the plugging wall supporting structure includes: the temporary plugging wall comprises an embedded component embedded in the temporary plugging wall, a positioning groove arranged on the second step and a T-shaped fixing rib connecting the positioning groove and the embedded component, wherein the T-shaped fixing rib forms a triangular structure with the temporary plugging wall and the positioning groove in the length extending direction.
2. The method for reinforcing the transverse channel of the existing tunnel by shield tunneling, according to claim 1, wherein the arch crown supporting devices are arranged in a plurality along the length direction of the first upper step, one arch crown supporting device of every two arch crown supporting devices is provided with a group of inclined supporting beam groups, each group of inclined supporting beam groups is provided with a plurality of inclined supporting beams, and the inclined supporting beams are correspondingly connected to the vertical supporting beams.
3. The method for reinforcing the transverse channel of the existing tunnel by downward penetration of the shield as claimed in claim 1, wherein the positioning groove is arranged on the upper surface of the second step, and the positioning groove is a rectangular groove or a triangular groove.
4. The method for reinforcing the transverse channel of the existing tunnel by downward penetration of the shield as claimed in claim 2, wherein a concrete reinforcing layer is arranged on the upper surface of the first upper step.
5. The method for reinforcing the transverse channel of the existing tunnel by the downward penetration of the shield as claimed in claim 1, wherein the T-shaped fixing rib comprises a cross rod and a vertical rod which are integrally connected, wherein the cross rod is connected with the positioning groove, and one end of the vertical rod, which is far away from the cross rod, is connected with the embedded component.
6. The method for reinforcing the transverse channel of the existing tunnel by downward penetration of the shield as claimed in claim 1, wherein the vertical supporting beams are made of 22a I-steel, and the transverse distance is 1 m.
7. The method for reinforcing the transverse channel of the existing tunnel by downward penetration of the shield as claimed in claim 1, wherein the oblique supporting beams are made of C22 steel bars and have a longitudinal spacing of 0.5 m.
8. The method for reinforcing the transverse channel of the existing tunnel by the downward penetration of the shield according to claim 1, wherein the embedded members of the supporting structure of the blocking wall are 22a I-steel.
9. The method for reinforcing the transverse channel of the existing tunnel by the downward penetration of the shield as recited in claim 8, wherein the temporary blocking wall comprises a double-layer steel mesh and an outer sealing layer covering the outer surface of the double-layer steel mesh, the outer sealing layer is a concrete structure layer sprayed on the outer surface of the double-layer steel mesh, and the thickness of the temporary blocking wall is 30 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010438474.XA CN111502708B (en) | 2020-05-22 | 2020-05-22 | Reinforcing construction method for shield downward penetration of existing tunnel transverse channel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010438474.XA CN111502708B (en) | 2020-05-22 | 2020-05-22 | Reinforcing construction method for shield downward penetration of existing tunnel transverse channel |
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| Publication Number | Publication Date |
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| CN111502708A true CN111502708A (en) | 2020-08-07 |
| CN111502708B CN111502708B (en) | 2024-05-28 |
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|---|---|---|---|---|
| JPH08177378A (en) * | 1994-12-21 | 1996-07-09 | Hazama Gumi Ltd | Two-stage shield machine |
| CN101550698A (en) * | 2009-05-05 | 2009-10-07 | 上海隧道工程股份有限公司 | Constructing method for basic pit at the upper part of shield tunnel |
| CN101737060A (en) * | 2009-12-28 | 2010-06-16 | 中铁二局股份有限公司 | Beneath-soil through-tunnel superlarge diameter pipe curtain construction method |
| CN102080548A (en) * | 2010-12-29 | 2011-06-01 | 上海隧道工程股份有限公司 | Construction method of tunnel to cross airport runway by shield method |
| CN107191206A (en) * | 2017-06-23 | 2017-09-22 | 中铁十二局集团有限公司 | A kind of step construction method of Shallow-buried Large-span Tunnel Unit two six |
| CN110173267A (en) * | 2019-06-06 | 2019-08-27 | 中铁一局集团第二工程有限公司 | Building up station construction method is passed through in a kind of metro shield section |
| CN110469345A (en) * | 2019-08-14 | 2019-11-19 | 中铁六局集团太原铁路建设有限公司 | High water level shallow depth loess tunnels control settlement restrains construction method |
| CN111156005A (en) * | 2020-03-11 | 2020-05-15 | 中铁二局集团有限公司 | Construction method for tunnel to pass through subway station at close distance |
| CN212563270U (en) * | 2020-05-22 | 2021-02-19 | 中铁三局集团广东建设工程有限公司 | Shield constructs to wear reinforcing bearing structure to existing tunnel cross passage down |
-
2020
- 2020-05-22 CN CN202010438474.XA patent/CN111502708B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08177378A (en) * | 1994-12-21 | 1996-07-09 | Hazama Gumi Ltd | Two-stage shield machine |
| CN101550698A (en) * | 2009-05-05 | 2009-10-07 | 上海隧道工程股份有限公司 | Constructing method for basic pit at the upper part of shield tunnel |
| CN101737060A (en) * | 2009-12-28 | 2010-06-16 | 中铁二局股份有限公司 | Beneath-soil through-tunnel superlarge diameter pipe curtain construction method |
| CN102080548A (en) * | 2010-12-29 | 2011-06-01 | 上海隧道工程股份有限公司 | Construction method of tunnel to cross airport runway by shield method |
| CN107191206A (en) * | 2017-06-23 | 2017-09-22 | 中铁十二局集团有限公司 | A kind of step construction method of Shallow-buried Large-span Tunnel Unit two six |
| CN110173267A (en) * | 2019-06-06 | 2019-08-27 | 中铁一局集团第二工程有限公司 | Building up station construction method is passed through in a kind of metro shield section |
| CN110469345A (en) * | 2019-08-14 | 2019-11-19 | 中铁六局集团太原铁路建设有限公司 | High water level shallow depth loess tunnels control settlement restrains construction method |
| CN111156005A (en) * | 2020-03-11 | 2020-05-15 | 中铁二局集团有限公司 | Construction method for tunnel to pass through subway station at close distance |
| CN212563270U (en) * | 2020-05-22 | 2021-02-19 | 中铁三局集团广东建设工程有限公司 | Shield constructs to wear reinforcing bearing structure to existing tunnel cross passage down |
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| CN111502708B (en) | 2024-05-28 |
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