CN214997645U - Be applicable to subway station goes out inlet pipe curtain construction pipe curtain structure - Google Patents
Be applicable to subway station goes out inlet pipe curtain construction pipe curtain structure Download PDFInfo
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- CN214997645U CN214997645U CN202120375717.XU CN202120375717U CN214997645U CN 214997645 U CN214997645 U CN 214997645U CN 202120375717 U CN202120375717 U CN 202120375717U CN 214997645 U CN214997645 U CN 214997645U
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- pipe curtain
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- 238000010276 construction Methods 0.000 title claims abstract description 60
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 114
- 239000010959 steel Substances 0.000 claims abstract description 114
- 239000002002 slurry Substances 0.000 claims abstract description 30
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 5
- 238000005553 drilling Methods 0.000 description 23
- 238000000034 method Methods 0.000 description 14
- 239000002689 soil Substances 0.000 description 13
- 239000004568 cement Substances 0.000 description 10
- 238000007789 sealing Methods 0.000 description 8
- 238000009412 basement excavation Methods 0.000 description 7
- 230000001360 synchronised effect Effects 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 230000010412 perfusion Effects 0.000 description 4
- 229910000746 Structural steel Inorganic materials 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004927 clay Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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Abstract
The utility model provides a be applicable to subway station and go out inlet pipe curtain construction pipe curtain structure, miniature pipe curtain is applicable to section headroom 10 ~ 15m, construction length is not more than 50 m's operating mode. The micro pipe curtain is a structure body consisting of a plurality of lock catches 2, a plurality of steel pipes 3 and slurry. The steel pipes are connected through the lock catches, the lock catches and the steel pipes are filled with slurry, a micro pipe curtain structure body is formed jointly, the overall structure of the micro pipe curtain is stable, and the construction is convenient.
Description
Technical Field
The utility model relates to a subway station construction technical field, concretely relates to be applicable to subway station goes out inlet pipe curtain construction pipe curtain structure.
Background
Urban rail transit develops rapidly, and in the general construction process, subway station access & exit need pass through ground urban road often. The buried depth of the access and exit underground excavation section is shallow, a plurality of municipal pipelines, canal underdrains and the like are buried below urban roads, and in order to ensure the structural safety of the existing urban roads, pipelines and underdrains, extremely severe requirements are set for ground settlement in the access and exit underground excavation section construction process. In Shandong coast areas of China, the stratum has the obvious characteristic of being soft at the top and hard at the bottom. The superficial surrounding rocks are mostly fourth-series filling, medium and coarse sand, silty clay and silty clay. The surrounding rock has poor stability, and when the shallow excavation method is carried out in the stratum, the ground surface is easy to deform greatly, and even the ground surface collapses.
The pipe curtain construction method belongs to a construction method capable of obviously reducing ground subsidence in shallow-buried underground excavation construction, has the characteristics of small stratum disturbance, strong water stopping capacity and the like, and can avoid influencing ground traffic and urban environment. At present, the connection between pipe curtain and steel pipes mainly depends on slurry, the connection is unstable, and water and mud leakage conditions exist; however, the prior pipe curtain method has less experience in the use in the stratum with soft top and hard bottom, and the pipe curtain construction has the problems of complicated working procedures, low construction efficiency, higher cost and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the not enough that prior art exists, provide one kind and be applicable to subway station and go out inlet pipe curtain construction pipe curtain structure, connect through the hasp between the steel pipe, and the slurry is filled up in hasp and the steel pipe, forms miniature pipe curtain structure.
Technical scheme
A pipe curtain structure suitable for construction of an outlet pipe curtain of a subway station is characterized in that a miniature pipe curtain is suitable for the working conditions that the section clearance is 10-15 m and the construction length is not more than 50 m; the micro pipe curtain is a structure body consisting of a plurality of lock catches 2, a plurality of steel pipes 3 and slurry;
the lock catch 2 is fixedly connected to the steel pipe 3; the lock catch 2 comprises a male lock catch 2-1 and a female lock catch 2-2; the male lock catch 2-1 and the female lock catch 2-2 are in a strip shape and are flush with the steel pipe 3 in length; the male lock catch 2-1 and the female lock catch 2-2 are fixedly connected to two sides of a single steel pipe 3 respectively.
The steel pipe 3 comprises a reinforcing plate 3-2;
in the section direction of the steel pipes 3, the steel pipes 3 are connected through the lock catches 2; in the connection mode, the male lock catches 2-1 of the steel pipes 3 are connected with the female lock catches 2-2 of the adjacent steel pipes 3.
In the length direction of the steel pipes 3, the steel pipes 3 are connected through reinforcing plates 3-2;
in a plurality of hasp 2, and in a plurality of steel pipe 3, all fill the slurry, form miniature pipe curtain jointly.
For further explaining the construction method of the miniature pipe curtain, the construction equipment and the materials of the miniature pipe curtain also comprise a grouting pressure relief pipe 1, an accelerator 5, a grouting pipe 7, a grouting closing device 9, a plugging plate 10, a spiral drill pipe 13, an angle sensor 14, an LED light source 15, a drilling machine platform 17, a main jacking oil pump 18, a slurry counter-force wall 19, a measuring hole 21 and a main jacking oil cylinder 22.
The grouting pressure relief pipe 1 is arranged on the steel pipe 3; when the grouting amount in the steel pipe 3 exceeds a certain value, redundant slurry is discharged from the grouting pressure relief pipe 1. The grouting process in the steel pipe 3 keeps the slurry in the pipe full.
The drilling machine platform 17 is positioned on a hardened ground 20, and the main jacking oil cylinder 22 is connected with the main jacking oil pump 18 to provide hydraulic power for the drilling machine platform 17;
the slurry reaction wall 19 is positioned at the side of the foundation pit and provides a drilling reaction force for the drilling machine platform 17;
the foundation pit supporting structure 16 is erected between the tunnel face 4 and the inner wall of the pit foundation and is used for forming a supporting system of a drilling space and playing a role in reinforcing the tunnel face 4;
the auger stem 13 is connected with a drilling machine platform 17 and is used for rotatably drilling a soil body and jacking two steel pipes 3 simultaneously;
an angle sensor 14 and an LED light source 15 are installed at the front end of the spiral drill rod 13, and the jacking angle is monitored in real time through connection with an external display; the auger stem 13 is used for drilling in a rotating way to take out soil scraps in the drill hole, and meanwhile, the main jacking oil cylinder 22 is used for jacking the steel pipe 3 into the soil body slowly; by adopting the static pressure steel pipe method, the drilling unearthing and the steel pipe jacking are synchronous, and the influence on the stratum is small.
The grouting pipe 7 is used for respectively grouting the steel pipe 3 and the lock catch 2; and the plurality of steel pipes are buckled with each other to finally form a continuous and closed pipe curtain.
The plugging plate 10 is arranged in the steel pipe 3;
the grouting sealing device 9 is arranged in the lock catch 2;
the accelerator 5 is used for sealing a gap between the steel pipe 3 and a soil body;
the measuring hole 21 is used for observing the grouting state in the steel pipe.
The utility model discloses a task is focused on miniature pipe curtain structure, and miniature pipe curtain construction equipment and method have been the ripe conventional technology among the equipment in this field and the construction method when using.
Has the advantages that:
the utility model provides a be applicable to subway station and go out inlet tube curtain construction pipe curtain structure, miniature pipe curtain is applicable to section headroom 10 ~ 15m, construction length is not more than 50 m's operating mode. The micro pipe curtain is a structure body consisting of a plurality of lock catches 2, a plurality of steel pipes 3 and slurry. The steel pipes are connected through the lock catches, the lock catches and the steel pipes are filled with slurry, a micro pipe curtain structure body is formed jointly, the overall structure of the micro pipe curtain is stable, and the construction is convenient.
Drawings
FIG. 1 is a schematic view of a connection structure of steel pipes in a pipe curtain
FIG. 2 is a schematic view of a single steel pipe and a locking structure
FIG. 3 schematic drawing of pipe roof jacking in construction
FIG. 4 schematic illustration of pipe curtain grouting
FIG. 5 is a schematic view of longitudinal segmentation and connection of steel pipes
FIG. 6 is a flow chart of pipe curtain construction
Numerical labeling:
the grouting pressure relief pipe comprises a grouting pressure relief pipe 1, a lock catch 2, a male lock catch 2-1, a female lock catch 2-2, a steel pipe 3, a reinforcing plate 3-2, a tunnel face 4, an accelerator 5, a grouting pipe 7, a grouting closing device 9, a plugging plate 10, a spiral drill pipe 13, an angle sensor 14, an LED light source 15, a foundation pit supporting structure 16, a drilling machine platform 17, a main jacking oil pump 18, a slurry counterforce wall 19, a hardened ground 20, a measuring hole 21 and a main jacking oil cylinder 22.
Detailed Description
To further explain the pipe curtain forming structure, the present device of the drilling rig platform is combined with the embodiments to describe the present invention in detail with reference to the attached drawings.
A pipe curtain structure suitable for subway station outlet and inlet pipe curtain construction is suitable for the working conditions that the section clearance is 10-15 m and the construction length is not more than 50 m; the micro pipe curtain is a structure body consisting of a plurality of lock catches 2, a plurality of steel pipes 3 and slurry;
as shown in fig. 2, the lock catch 2 is fixedly connected to the steel tube 3; the lock catch 2 comprises a male lock catch 2-1 and a female lock catch 2-2; the male lock catch 2-1 and the female lock catch 2-2 are in a strip shape and are flush with the steel pipe 3 in length; the male lock catch 2-1 and the female lock catch 2-2 are fixedly connected to two sides of a single steel pipe 3 respectively.
The steel pipe 3 comprises a reinforcing plate 3-2;
in the section direction of the steel pipes 3, the steel pipes 3 are connected through the lock catches 2; in the connection mode, the male lock catches 2-1 of the steel pipes 3 are connected with the female lock catches 2-2 of the adjacent steel pipes 3.
As shown in fig. 5, in the longitudinal direction of the steel pipes 3, a plurality of steel pipes 3 are connected by reinforcing plates 3-2;
as shown in fig. 1, the plurality of lock catches 2 and the plurality of steel pipes 3 are filled with slurry to form a micro pipe curtain.
For further explaining the construction method of the micro pipe curtain, as shown in fig. 3 and 4, the micro pipe curtain construction equipment and materials further comprise a grouting pressure relief pipe 1, an accelerator 5, a grouting pipe 7, a grouting closing device 9, a plugging plate 10, a spiral drill pipe 13, an angle sensor 14, an LED light source 15, a drilling machine platform 17, a main jacking oil pump 18, a slurry reaction wall 19, a measuring hole 21 and a main jacking oil cylinder 22.
The grouting pressure relief pipe 1 is arranged on the steel pipe 3; when the grouting amount in the steel pipe 3 exceeds a certain value, redundant slurry is discharged from the grouting pressure relief pipe 1. The grouting process in the steel pipe 3 keeps the slurry in the pipe full.
The drilling machine platform 17 is positioned on a hardened ground 20, and the main jacking oil cylinder 22 is connected with the main jacking oil pump 18 to provide hydraulic power for the drilling machine platform 17;
the slurry reaction wall 19 is positioned at the side of the foundation pit and provides a drilling reaction force for the drilling machine platform 17;
the foundation pit supporting structure 16 is erected between the tunnel face 4 and the inner wall of the pit foundation and is used for forming a supporting system of a drilling space and playing a role in reinforcing the tunnel face 4;
the auger stem 13 is connected with a drilling machine platform 17 and is used for rotatably drilling a soil body and jacking two steel pipes 3 simultaneously;
an angle sensor 14 and an LED light source 15 are installed at the front end of the spiral drill rod 13, and the jacking angle is monitored in real time through connection with an external display; the auger stem 13 is used for drilling in a rotating way to take out soil scraps in the drill hole, and meanwhile, the main jacking oil cylinder 22 is used for jacking the steel pipe 3 into the soil body slowly; by adopting the static pressure steel pipe method, the drilling unearthing and the steel pipe jacking are synchronous, and the influence on the stratum is small.
The grouting pipe 7 is used for respectively grouting the steel pipe 3 and the lock catch 2; and the plurality of steel pipes are buckled with each other to finally form a continuous and closed pipe curtain.
The plugging plate 10 is arranged in the steel pipe 3;
the grouting sealing device 9 is arranged in the lock catch 2;
the accelerator 5 is used for sealing a gap between the steel pipe 3 and a soil body;
the measuring hole 21 is used for observing the grouting state in the steel pipe.
The utility model discloses a task is focused on miniature pipe curtain structure, and miniature pipe curtain construction equipment and method have been the ripe conventional technology among the equipment in this field and the construction method when using.
Example 1
Adopt the utility model discloses a be applicable to subway station and go out inlet pipe curtain construction pipe curtain structure, its construction steps as follows:
s1: measuring and setting out, determining construction position and angle, constructing pipe curtain working pits, installing and debugging equipment in the field, and constructing a counterforce wall and other accessory components.
Furthermore, the open-cut and underground-cut transition section is provided with a pipe curtain construction working chamber, so that the width of the pipe curtain working chamber is prevented from limiting the pipe curtain supporting range, the open-cut range is expanded at the transition section in consideration of the pipe curtain construction clearance and the pipe curtain construction length, and the transition section is used as the pipe curtain construction working chamber.
S2: under the protection of foundation pit supporting structure, digging at the undercut section excavation line outside 200mm position and establishing the pipe curtain, constructing a bilateral symmetry's two female hasp steel pipes at undercut section hunch portion intermediate position. Then constructing towards two sides in sequence; the adjacent steel pipes are mutually buckled through male and female lock catches, namely the male lock catch 2-1 of the steel pipe 3 under construction enters along the female lock catch groove 2-2 of the previous steel pipe 3, the current steel pipe 3 under construction is controlled by means of the track of the previous steel pipe 3, the steel pipe 3 under construction is pushed in while being rotated through the auger stem 13 to remove slag, the length of the steel pipe is 6m per section according to site construction conditions, T-shaped grooves of joint positions of the steel pipes are welded, and the welding joints are mutually staggered and are not smaller than 1 m.
And filling the slurry in the lock catch and the steel pipe after the steel pipe is drilled.
S3: and (4) sequentially breaking the fender piles, and constructing the pipe curtain according to the steps. After the steel pipes 3 are drilled, pure cement slurry is adopted for grouting in the steel pipes and between the lock catches through the grouting pipes 7, and the steel pipes are buckled with each other to finally form a continuous and closed pipe curtain.
The locking structure is composed of a female locking notch and a male locking notch, as shown in fig. 2. The female fore shaft is formed by welding two right angles of two angle steels on the outer circumference of the steel pipe oppositely, and the male fore shaft is formed by welding two right angles of two angle steels on the outer circumference of the steel pipe oppositely. The lock catch and the steel pipes are welded on both sides, and the steel pipes are welded by adopting T-shaped grooves. The steel pipe is provided with a directional grouting pipe, and fixed-point grouting can be performed aiming at the settlement area.
The parameters and specifications of the pure cement slurry filled and poured in the pipe are that the slurry is mixed by P.O42.5R cement, and the water-cement ratio is 0.8: 1; the filling pressure in the tube is between 0.2 and 0.5MPa, the filling amount in the tube is not less than the theoretical grouting amount, and the liquid level in the tube sinks to be less than 1mm/min to form a final hole; after the completion of the primary in-tube perfusion, performing supplementary perfusion after 2 hours to ensure the in-tube filling; the pouring sequence in the pipe is constructed from bottom to top, and finally the arch steel pipe is filled; in order to ensure synchronous filling in the lock catch, grouting holes with the diameter of 8mm are formed between every 1m of lock catch angle iron.
Example 2
The single steel pipe construction step flow is as shown in fig. 6:
s1, hoisting the pipe curtain steel pipe to the hole;
s2 surveying the angle of the light theodolite again;
s3, jacking the steel pipe, and spirally unearthing;
s4, correcting the deviation according to the pipe-approaching angle;
s5, circularly advancing, and welding and adding pipes;
s6, completing jacking, and pulling back and cleaning soil;
s7, rechecking the angle and evaluating the effect;
and S8, sealing and moving the machine, and determining a construction plan according to the angle condition.
The utility model provides a pipe curtain construction method uses in the city subway tunnel access & exit construction that is urban road to the top, at first enlarges the excavation to the access & exit open cut section when the construction and handles to this is as pipe curtain studio, thereby guarantees to provide the range of strutting of enough pipe curtains, can not cause the problem that the part subsides or landslide with ensureing that access & exit excavation in-process ground. In this embodiment, the pipe-roof construction clearance 10m does not include a counterforce wall, the pipe-roof construction length is 39m, the clear width is 7.6m, the center of the arch springing pipe-roof is outward 1m, and therefore the foundation pit support structure needs to be expanded by 1.5m from the original design width to both sides.
In this embodiment, in order to guarantee going on smoothly of pipe curtain studio construction, should avoid occupying pipe curtain studio space, influence the pipe curtain jacking construction to avoid hunch portion pipe curtain construction position. The pipe curtain studio is one section and is executed as the counterforce wall, and the counterforce wall adopts the dowel slurry to pour, and the access & exit tunnel axis of perpendicular to for guaranteeing counterforce wall rigidity and intensity, certain thickness is guaranteed to the counterforce wall, and the counterforce wall side is greater than 1m apart from the pipe curtain center.
In the embodiment, 29 tube curtains are arranged on the section of the tunnel, the center distance between steel tubes of the tube curtains is 350mm, the diameter of the adopted steel tube is 299mm, the thickness of the steel tube is 10mm, and Q235-A steel is adopted. The specification of the angle iron welded as the male and female locking notches is 56 × 8 mm. The locking notch has important significance in pipe curtain construction, the steel pipe is finally formed into the pipe curtain through occlusion of the locking notch, and the locking notch and the steel pipe are stressed together in jacking, so that certain strength and rigidity are required.
In the embodiment, the drill bit with the LED light source and the spiral drill rod penetrate into the steel pipe, are installed on the pipe pushing machine and connected well, soil scraps are brought out through rotation of the spiral drill rod, the pipe is pushed by static pressure, soil discharging and jacking are synchronous, and the influence on the stratum is small. An angle sensor is installed at the front end of the steel pipe, and is connected with a display screen through a lead-out signal wire, so that the jacking angle is monitored in real time, and deviation rectification and guidance are realized through certain measures.
In this embodiment, during the pipe curtain construction, the steel pipe is pushed in and the soil is spirally excavated in the pipe. And taking a steel pipe locking structure of the spiral drilling tool with the rock breaking drill bit arranged inside as an outer sleeve. And in the construction process, jacking, cutting and deslagging are carried out simultaneously, and the fore jacking of the locking notch steel pipe section by section is carried out to the designed position.
The filling medium for pipe curtain grouting adopts P.O42.5 ordinary portland cement single-liquid or double-liquid slurry, and the mixing proportion is 0.8-1.0; the grouting pressure is controlled within the range of 0.3-0.8 MPa. And (4) sealing the steel plate at the pipe orifice of the steel pipe during grouting, and welding the grouting pipe. And sealing the gap between the steel pipe and the soil body by adopting an accelerator material. And stirring cement slurry solution according to a designed proportion, connecting a grouting pipeline and a small amount of water injection test pipelines. And injecting cement slurry according to the design amount or grouting pressure until the requirement is met. Closing the valve, disassembling the grouting pipe, and sequentially filling and grouting in the pipe; and cleaning the pipeline, cleaning the field and finishing grouting construction.
Grouting parameters of cement paste in the pipe: the buckling end of the pipe curtain steel pipe is closed, a grouting hole is reserved, the diameter of the grouting hole is phi 25mm, and a valve is installed; spraying anchors on the tunnel face to be sealed, sealing the lock catch positions between adjacent steel pipes by using an accelerating agent, and reserving an exhaust hose 2m higher than the pipe buckle; filling cement slurry into the pipe, wherein the slurry is prepared by mixing P.O42.5R cement, and the water-cement ratio is 0.8: 1; the filling pressure in the tube is between 0.2 and 0.5MPa, the filling amount in the tube is not less than the theoretical grouting amount, and the liquid level in the tube sinks to be less than 1mm/min to form a final hole; after the completion of the primary in-tube perfusion, performing supplementary perfusion after 2 hours to ensure the in-tube filling; the pouring sequence in the pipe is constructed from bottom to top, and finally the arch steel pipe is filled; in order to ensure synchronous filling in the lock catch, grouting holes with the diameter of 8mm are formed between every 1m of lock catch angle iron.
The invention aims at the structural structure of the micro pipe curtain, and the micro pipe curtain construction equipment and the method are mature conventional technologies in system control in the field during application.
Claims (1)
1. A pipe curtain structure suitable for construction of an outlet pipe curtain of a subway station is characterized in that a miniature pipe curtain is suitable for the working conditions that the section clearance is 10-15 m and the construction length is not more than 50 m; the micro pipe curtain is a structure body consisting of a plurality of lock catches (2), a plurality of steel pipes (3) and slurry;
the lock catch (2) comprises a male lock catch (2-1) and a female lock catch (2-2); the male lock catch (2-1) and the female lock catch (2-2) are in a strip shape and are flush with the steel pipe (3) in length; the male lock catch (2-1) and the female lock catch (2-2) are fixedly connected to two sides of a single steel pipe (3) respectively;
the steel pipe (3) comprises a reinforcing plate (3-2);
in the section direction of the steel pipes (3), the steel pipes (3) are connected through the lock catches (2); in the connection mode, the male lock catch (2-1) of the steel pipe (3) is connected with the female lock catch (2-2) of the adjacent steel pipe (3);
in the length direction of the steel pipes (3), the steel pipes (3) are connected through reinforcing plates (3-2);
in a plurality of hasps (2), all fill the thick liquids in a plurality of steel pipe (3), form miniature pipe curtain jointly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120375717.XU CN214997645U (en) | 2021-02-18 | 2021-02-18 | Be applicable to subway station goes out inlet pipe curtain construction pipe curtain structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120375717.XU CN214997645U (en) | 2021-02-18 | 2021-02-18 | Be applicable to subway station goes out inlet pipe curtain construction pipe curtain structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214997645U true CN214997645U (en) | 2021-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120375717.XU Expired - Fee Related CN214997645U (en) | 2021-02-18 | 2021-02-18 | Be applicable to subway station goes out inlet pipe curtain construction pipe curtain structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN214997645U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115142859A (en) * | 2022-09-01 | 2022-10-04 | 中国矿业大学(北京) | Pipe curtain construction equipment and pipe curtain construction method |
-
2021
- 2021-02-18 CN CN202120375717.XU patent/CN214997645U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115142859A (en) * | 2022-09-01 | 2022-10-04 | 中国矿业大学(北京) | Pipe curtain construction equipment and pipe curtain construction method |
| CN115142859B (en) * | 2022-09-01 | 2023-01-20 | 中国矿业大学(北京) | Pipe curtain construction equipment and pipe curtain construction method |
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