CN109441479B - Collapse treatment method for underground excavation tunnel - Google Patents
Collapse treatment method for underground excavation tunnel Download PDFInfo
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- CN109441479B CN109441479B CN201811240133.0A CN201811240133A CN109441479B CN 109441479 B CN109441479 B CN 109441479B CN 201811240133 A CN201811240133 A CN 201811240133A CN 109441479 B CN109441479 B CN 109441479B
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000009412 basement excavation Methods 0.000 title claims description 7
- 238000010276 construction Methods 0.000 claims abstract description 33
- 238000005507 spraying Methods 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 11
- 229910001220 stainless steel Inorganic materials 0.000 claims description 52
- 239000010935 stainless steel Substances 0.000 claims description 52
- 239000002689 soil Substances 0.000 claims description 33
- 239000004567 concrete Substances 0.000 claims description 15
- 241001669679 Eleotris Species 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 239000002002 slurry Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 241001465754 Metazoa Species 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011378 shotcrete Substances 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/006—Lining anchored in the rock
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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
-
- 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
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to a method for treating collapse of an underground excavated tunnel, which comprises the following construction steps: step A: performing primary support before construction; and B: closing the collapsed hole at the top of the tunnel; and C: backfilling the cave; step D: spraying and filling materials in the cave; step E: and grouting the collapsed hole. The tunnel collapse treatment method has the advantages of safety, reliability, low cost, capability of timely and effectively treating the collapsed tunnel and higher stability of the treated collapsed area.
Description
Technical Field
The invention relates to the technical field of underground excavation tunnel construction, in particular to a method for treating collapse of an underground excavation tunnel, which is provided for how to treat a collapsed section and a vault sunken section after collapse occurs in the process of underground excavation tunnel.
Background
In tunnel construction, landslides are one of the most common geological hazards. Once collapse occurs, not only is the construction period delayed and the engineering cost greatly increased, but also the life safety of construction and technical personnel is endangered, the engineering quality hidden danger is also caused, great difficulty is brought to maintenance work, and even the tunnel cannot be normally used.
Particularly, when a short tunnel with low altitude and shallow burial depth is excavated by a new Austrian method, due to the reasons that an upper step and a lower step are too long, an inverted arch frame is not installed in time, an arch ring cannot be closed as early as possible, a secondary lining cannot be followed up and the like, construction is performed in rainy seasons, rainwater is greatly gathered in a mountain, the load of a vault is greatly increased, collapse of the tunnel is possibly caused, and the direct consequence of collapse of the tunnel is that huge pits appear on the ground of the mountain, a large amount of soil body flows into a hole, primary support steel frames of the collapse section almost completely collapse, and vaults at the front side and the rear side of the collapse section are sunk.
At present, tunnel engineering collapse treatment mainly comprises a plate inserting method, a pipe shed method, a freezing method, an anchor rod method, an open excavation method and the like, but the treatment effect is good and uneven, and the safety cannot be ensured exactly. In order to standardize construction, improve treatment effect, improve operation efficiency and increase safety guarantee, researches and explores a safe, effective and feasible tunnel collapse treatment method, which has very important significance for reducing the construction risk of the undercut tunnel.
Disclosure of Invention
The invention aims to provide a method for treating collapse of an underground excavated tunnel, which has the advantages of safety, reliability and low cost, can effectively treat the collapsed tunnel in time, and ensures that the treated collapsed area has higher stability.
The technical purpose of the invention is realized by the following technical scheme: a method for treating collapse of a subsurface tunnel comprises the following construction steps:
step A: performing primary support before construction;
and B: closing the collapsed hole at the top of the tunnel;
the step B comprises the following steps:
step B1: fixing the prefabricated stainless steel arc-shaped plate at the collapse position of the top of the tunnel through a plurality of stand columns to form a vertical support;
step B2: fixing a sleeper extending along the length direction of the tunnel in a position which is in the tunnel and is positioned below the stainless steel arc plate, enabling a steel pipe which is fixed on two sides of the sleeper in advance and is internally connected with a screw rod in a threaded manner to be vertical to the central line of the tunnel, and then rotating the screw rod to enable one end of the screw rod fixedly connected with a top head to be tightly propped against the position, close to the bottom end, of the stainless steel arc plate to form a transverse support;
and C: backfilling the collapsed hole;
step D: spraying and filling materials in the collapsed hole;
step E: and grouting the collapsed hole.
Through the technical scheme, the construction method is safe, reliable and low in cost, can timely and effectively treat the collapsed tunnel, and enables the treated collapsed area to have higher stability. The safety of workers in the subsequent construction process is guaranteed through primary support, then the collapse hole in the top of the tunnel is sealed, the soil body is prevented from further collapsing, the collapse hole is filled through backfilling treatment to form a new soil body, then the new soil body is tightly combined with the soil body around the tunnel through material spraying filling, and finally slurry is fully filled to the gap between the new soil body and the soil body around the tunnel through grouting operation to play a role in adhesion and form a final reinforcing body.
The invention is further configured to: the step A comprises the following steps:
step A1: surveying the collapse range of the original ground of the mountain, pulling up a warning line around the pit of the mountain, and arranging a protective net;
step A2: clearing earthwork falling into the tunnel after the collapse;
step A3: and carrying out primary spraying support on the inner wall of the tunnel at the collapse position.
According to the technical scheme, before construction, the collapse range of the original ground of the mountain is surveyed, the warning lines are pulled up around the pit of the mountain, and the protective net is arranged to prevent people or animals on the mountain from falling into the pit to cause potential safety hazards; the earthwork falling into the tunnel after collapse is transported to the outside of the tunnel through the trolley, so that the subsequent construction operation can be conveniently carried out; after the cleaning is finished, concrete is sprayed on the inner wall of the tunnel at the collapse position for supporting, and meanwhile, humidification treatment is selectively carried out according to the actual construction requirement, so that the concrete can be rapidly condensed and hardened, primary support is formed on the inner wall of the tunnel, and the operation safety of workers is improved.
The invention is further configured to: the step B comprises the following steps:
step B3: holes reserved on the stainless steel arc-shaped plate are reinforced through anchor rods.
Through above-mentioned technical scheme, the setting of stock for hug closely fixedly with the inner wall in stainless steel arc and tunnel, make it when increasing stainless steel arc stability, reduce the clearance between the inner wall in stainless steel arc and tunnel, when preventing to spout material in the step D or step E in the slip casting, its liquid outflow influences further construction.
The invention is further configured to: the step B3 further includes:
step B3-1: and spraying concrete around the stainless steel arc plate to seal the stainless steel arc plate with the inner wall of the tunnel.
Through the technical scheme, the concrete is sprayed around the stainless steel arc-shaped plate, so that the stainless steel arc-shaped plate and the inner wall of the tunnel are further sealed.
The invention is further configured to: and C, filling the large earthwork into the collapsed hole through a backfill opening reserved on the stainless steel arc-shaped plate, spraying a layer of concrete when each layer is backfilled, and then plugging the backfill opening through the welding plate.
Through the technical scheme, the earthwork is filled to form a new soil body in the collapsed hole, and then one layer of concrete is sprayed to reinforce layer by layer when each layer is backfilled, so that the new soil body is more stable.
The invention is further configured to: and D, connecting the stainless steel arc plate with a prefabricated interface on the stainless steel arc plate through material spraying equipment, and spraying concrete and stones into the collapsed hole formed after collapse for coarse filling.
Through the technical scheme, the rough filling is carried out through the sprayed concrete and the stones, and the collapsed hole is filled as far as possible, so that the using amount of the slurry in the step E is reduced, and the construction cost is reduced.
The invention is further configured to: the step E comprises the following steps:
step E1: the stainless steel arc plate is connected with another prefabricated interface on the stainless steel arc plate through grouting equipment, and grouting treatment is carried out, so that the stainless steel arc plate is in full contact with surrounding soil;
step E2: and (4) dismantling the transverse support and the vertical support.
Through the technical scheme, the stainless steel arc-shaped plate is in full contact with the surrounding soil body through grouting operation, so that slurry is fully filled in the gap between the newly formed soil body and the soil body surrounding the tunnel, and the effect of adhesion is achieved.
In conclusion, the beneficial technical effects of the invention are as follows:
1. according to the construction method, safety of workers in the subsequent construction process is guaranteed through primary support, then a collapse hole in the top of a tunnel is sealed, soil bodies are prevented from further collapse, then the collapse hole is filled through backfill treatment to form a new soil body, then the new soil body is filled through spraying materials, the new soil body is tightly combined with the soil bodies around the tunnel, and finally slurry is fully filled to the gap between the new soil body and the soil bodies around the tunnel through grouting operation to play a role in adhesion and form a final reinforcing body, so that compared with direct grouting, the construction method is lower in cost and has higher stability;
2. the stainless steel arc-shaped plate is reinforced through the vertical supports, the transverse supports and the anchor rods, so that the stability of the stainless steel arc-shaped plate after installation is greatly improved, and the operation safety of workers is improved;
3. through the shotcrete all around at the stainless steel arc for make its inner wall further sealed with the tunnel, when preventing the slip casting, the thick liquid flows out in the clearance of stainless steel arc and tunnel inner wall.
Drawings
FIG. 1 is a schematic overall flow diagram of the present invention;
FIG. 2 is a schematic view showing the overall construction;
fig. 3 is a schematic structural view of a stainless steel arc-shaped plate.
In the figure, 1, a tunnel; 2. collapsing the hole; 3. a stainless steel arc plate; 31. a hole; 32. backfilling the opening; 33. prefabricating an interface; 4. a column; 5. crossties; 6. a screw; 61. ejecting the head; 7. a steel pipe; 8. an anchor rod; 9. and (6) welding the plate.
Detailed Description
Referring to fig. 1 and 2, the method for treating collapse of an underground excavated tunnel disclosed by the invention comprises the following construction steps:
step A: performing primary support before construction;
and B: closing a collapse hole 2 at the top of the tunnel 1;
and C: backfilling the collapsed hole 2;
step D: spraying and filling materials in the collapse hole 2;
step E: and (5) grouting the collapse hole 2.
The construction method is safe and reliable, has low cost, can timely and effectively treat the collapsed tunnel 1, and enables the treated collapsed area to have higher stability. The safety of workers in the subsequent construction process is guaranteed through primary support, then the collapse hole 2 in the top of the tunnel 1 is sealed, the soil body is prevented from further collapse, then the collapse hole 2 is filled through backfill treatment to form a new soil body, then the new soil body is filled through spraying materials to enable the newly formed soil body to be tightly combined with the soil body around the tunnel 1, and finally slurry is fully filled to the gap between the newly formed soil body and the soil body around the tunnel 1 through grouting operation to play a role in adhesion and form a final reinforcing body.
Referring to fig. 2, step a includes:
step A1: before construction, the collapse range of the original ground of the mountain is surveyed, warning lines are pulled up around the pit of the mountain, and a protective net is arranged to prevent people or animals on the mountain from falling into the pit to cause potential safety hazards.
Step A2: the earthwork falling into the tunnel 1 after collapse is transported to the outside of the tunnel 1 through the trolley, so that the follow-up construction operation can be conveniently carried out.
Step A3: after cleaning, spraying concrete to the inner wall of the tunnel 1 at the collapse position for supporting, and selectively humidifying according to the actual construction requirement so that the concrete can be rapidly condensed and hardened to form primary support for the inner wall of the tunnel 1.
Referring to fig. 2 and 3, step B includes:
step B1: the prefabricated stainless steel arc-shaped plate 3 is conveyed to the collapse position at the top of the tunnel 1, and then a plurality of stand columns 4 which are arranged side by side are tightly propped against the concave surface of the stainless steel arc-shaped plate 3 through propping equipment to form vertical support, wherein the propping equipment can adopt a jack or an oil cylinder and the like.
Step B2: in tunnel 1 and be located the position of stainless steel arc 3 below, place a sleeper 5 that extends along 1 length direction in tunnel, its accessible spike is fixed, at this moment, fix in advance that 5 both sides of sleeper and inside threaded connection have the steel pipe 7 of screw rod 6 mutually perpendicular with the central line in tunnel 1, then rotate screw rod 6, the one end top that makes screw rod 6 rigid coupling have top 61 tightly is close to the position of bottom at stainless steel arc 3, form horizontal support, it mutually supports with vertical braces, make stainless steel arc 3 have higher stability after the installation, the length of screw rod 6 and steel pipe 7 designs according to the internal diameter in tunnel 1.
Step B3: after the transverse support is completed, the anchor rod 8 penetrates through the hole 31 reserved in the stainless steel arc-shaped plate 3 and is tightly attached and fixed with the inner wall of the tunnel 1, so that the stability of the stainless steel arc-shaped plate 3 is improved, the gap between the stainless steel arc-shaped plate 3 and the inner wall of the tunnel 1 is reduced, and when the step D is used for spraying or the step E is used for grouting, liquid flows out to influence further construction.
Step B3-1: after the anchor rod 8 is fixed, concrete is sprayed around the stainless steel arc-shaped plate 3, so that the stainless steel arc-shaped plate and the inner wall of the tunnel 1 are further sealed.
Referring to fig. 2 and 3, in step C, large earthwork is manually filled into the collapsed hole 2 through the backfill port 32 reserved on the stainless steel arc-shaped plate 3 to form a new soil body, one layer of concrete is sprayed for reinforcement every time the soil body is backfilled, and after the operation is finished, the backfill port 32 is blocked through the welding plate 9.
And D, connecting the prefabricated connector 33 on the stainless steel arc-shaped plate 3 through material spraying equipment, then spraying concrete and stones into the collapsed hole 2 formed after collapse for coarse filling, and filling the collapsed hole 2 as far as possible, so that the using amount of the grout in the step E is reduced, and the construction cost is reduced.
The step E comprises the following steps:
step E1: the stainless steel arc-shaped plate 3 is connected with another prefabricated interface 33 on the stainless steel arc-shaped plate 3 through grouting equipment, and grouting operation is carried out, so that the stainless steel arc-shaped plate 3 is in full contact with surrounding soil, and slurry is fully filled in a gap between the newly formed soil and the soil surrounding the tunnel 1 to play a role in adhesion.
Step E2: removing the jacking equipment, and then removing the upright post 4; the screw 6 is rotated to separate the top 61 from the stainless steel arc plate 3, and the transverse support is released.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (7)
1. A collapse treatment method for an underground excavation tunnel is characterized by comprising the following steps: the method comprises the following construction steps:
step A: performing primary support before construction;
and B: closing a collapse hole (2) at the top of the tunnel (1);
the step B comprises the following steps:
step B1: fixing the prefabricated stainless steel arc-shaped plate (3) at the collapse position of the top of the tunnel (1) through a plurality of upright posts (4) to form a vertical support;
step B2: fixing a sleeper (5) extending along the length direction of the tunnel (1) at a position in the tunnel (1) and below the stainless steel arc-shaped plate (3), enabling a steel pipe (7) which is fixed on two sides of the sleeper (5) in advance and is connected with a screw rod (6) in a threaded manner to be vertical to the central line of the tunnel (1), and then rotating the screw rod (6) to enable one end of the screw rod (6) fixedly connected with a top head (61) to be tightly propped against the position, close to the bottom end, of the stainless steel arc-shaped plate (3) to form a transverse support;
and C: backfilling the collapsed hole (2);
step D: spraying and filling materials in the collapse hole (2);
step E: and grouting the collapsed hole (2).
2. The undercut tunnel collapse treatment method according to claim 1, wherein: the step A comprises the following steps:
step A1: surveying the collapse range of the original ground of the mountain, pulling up a warning line around the pit of the mountain, and arranging a protective net;
step A2: clearing earthwork falling into the tunnel (1) after collapse;
step A3: and carrying out primary spraying support on the inner wall of the tunnel (1) at the collapse position.
3. The undercut tunnel collapse treatment method according to claim 1, wherein: the step B further comprises the following steps:
step B3: holes (31) reserved on the stainless steel arc-shaped plate (3) are reinforced through anchor rods (8).
4. The undercut tunnel collapse treatment method according to claim 3, wherein: the step B3 further includes:
step B3-1: and spraying concrete around the stainless steel arc-shaped plate (3) to seal the stainless steel arc-shaped plate with the inner wall of the tunnel (1).
5. The undercut tunnel collapse treatment method according to claim 1, wherein: and in the step C, filling the large earthwork into the collapse hole (2) through a backfill port (32) reserved on the stainless steel arc-shaped plate (3), spraying a layer of concrete when each layer is backfilled, and then plugging the backfill port (32) through the welding plate (9).
6. The undercut tunnel collapse treatment method according to claim 1, wherein: and D, connecting the stainless steel arc-shaped plate with a prefabricated interface (33) on the stainless steel arc-shaped plate (3) through material spraying equipment, and spraying concrete and stones into the collapsed hole (2) formed after collapse for coarse filling.
7. The undercut tunnel collapse treatment method according to claim 1, wherein: the step E comprises the following steps:
step E1: the stainless steel arc-shaped plate is connected with another prefabricated interface (33) on the stainless steel arc-shaped plate (3) through grouting equipment, and grouting operation is carried out, so that the stainless steel arc-shaped plate (3) is fully contacted with surrounding soil bodies;
step E2: and (4) dismantling the transverse support and the vertical support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811240133.0A CN109441479B (en) | 2018-10-23 | 2018-10-23 | Collapse treatment method for underground excavation tunnel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811240133.0A CN109441479B (en) | 2018-10-23 | 2018-10-23 | Collapse treatment method for underground excavation tunnel |
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| CN109441479A CN109441479A (en) | 2019-03-08 |
| CN109441479B true CN109441479B (en) | 2021-03-09 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109973122A (en) * | 2019-05-14 | 2019-07-05 | 福建工程学院 | A Tunnel Reinforcement Control Method for Loose Surrounding Rock or Large Deformation of Soft Rock |
| CN110397458A (en) * | 2019-07-03 | 2019-11-01 | 中铁四局集团第五工程有限公司 | Three-dimensional reinforcement construction method suitable for collapse tunnel extension |
| CN111365044B (en) * | 2020-03-11 | 2020-11-20 | 山东科技大学 | A method for dealing with tunnel collapse by using top-mounted shield support |
| CN111365042A (en) * | 2020-03-13 | 2020-07-03 | 重庆工程职业技术学院 | Large-section tunnel supporting device |
| CN113187498B (en) * | 2021-05-13 | 2022-11-04 | 中铁十六局集团第二工程有限公司 | A TBM tunnel collapse cavity backfill and advanced pipe shed construction method |
| CN115162408B (en) * | 2022-06-14 | 2024-02-02 | 长江勘测规划设计研究有限责任公司 | Construction method for repairing collapse tunnel |
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| CN106837419A (en) * | 2017-04-07 | 2017-06-13 | 兖州煤业股份有限公司 | Face sky old working compound closure wall and its method of construction |
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| CN108561165A (en) * | 2018-06-15 | 2018-09-21 | 贵州大学 | A kind of tunnel supporting apparatus convenient for deployment and dismounting |
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| JP2001355394A (en) * | 2000-06-13 | 2001-12-26 | Mitsubishi Heavy Ind Ltd | Tunnel-collapse preventive structure |
| DE10356696B3 (en) * | 2003-11-28 | 2005-06-30 | Prof. Dr.-Ing. Stein & Partner Gmbh | Method and device for trenchless laying of pipelines |
| CN105257301B (en) * | 2015-10-16 | 2017-11-03 | 中铁十局集团第一工程有限公司 | A kind of shallow-depth-excavation tunnel weak surrounding rock landslide reinforcing and processing method |
| CN205063972U (en) * | 2015-10-28 | 2016-03-02 | 中铁建大桥工程局集团第五工程有限公司 | A fill formula strutting arrangement for controlling tunnel landslide |
| CN106545351B (en) * | 2016-11-02 | 2018-07-24 | 山东科技大学 | A kind of tunnel front landslide emergency processing method |
| CN106894826B (en) * | 2017-05-08 | 2024-02-23 | 中国水利水电建设工程咨询中南有限公司 | Supporting structure and supporting method for collapse section in hole |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837419A (en) * | 2017-04-07 | 2017-06-13 | 兖州煤业股份有限公司 | Face sky old working compound closure wall and its method of construction |
| CN108005695A (en) * | 2018-01-31 | 2018-05-08 | 中铁北京工程局集团第工程有限公司 | The fast-supporting device and method of branch large deformation at the beginning of for punishing tunnel weak surrounding rock |
| CN108561165A (en) * | 2018-06-15 | 2018-09-21 | 贵州大学 | A kind of tunnel supporting apparatus convenient for deployment and dismounting |
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