CN114892639A - Steel sheet pile capable of being disassembled and synchronously grouted in pile pulling process and using method thereof - Google Patents
Steel sheet pile capable of being disassembled and synchronously grouted in pile pulling process and using method thereof Download PDFInfo
- Publication number
- CN114892639A CN114892639A CN202210488499.XA CN202210488499A CN114892639A CN 114892639 A CN114892639 A CN 114892639A CN 202210488499 A CN202210488499 A CN 202210488499A CN 114892639 A CN114892639 A CN 114892639A
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- steel sheet
- pile
- disassembled
- pulling process
- steel plate
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 112
- 239000010959 steel Substances 0.000 title claims abstract description 112
- 238000000034 method Methods 0.000 title claims abstract description 41
- 230000008569 process Effects 0.000 title claims description 33
- 230000000694 effects Effects 0.000 claims abstract description 8
- 239000004033 plastic Substances 0.000 claims description 43
- 229920003023 plastic Polymers 0.000 claims description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 238000002347 injection Methods 0.000 claims description 17
- 239000007924 injection Substances 0.000 claims description 17
- 239000002689 soil Substances 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 8
- 238000007569 slipcasting Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000005461 lubrication Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 7
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/14—Sealing joints between adjacent sheet piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
- E02D9/02—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof by withdrawing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/30—Landfill technologies aiming to mitigate methane emissions
Abstract
The invention discloses a detachable steel sheet pile capable of synchronously grouting in pile pulling and a using method thereof, and relates to the technical field of steel sheet pile construction. The invention has the effect of synchronous grouting during pile pulling.
Description
Technical Field
The invention relates to the technical field of steel sheet pile construction, in particular to a steel sheet pile which can be disassembled and can be synchronously grouted in a pile pulling process and a using method thereof.
Background
At present, steel sheet piles are used as a permanent temporary foundation pit supporting structure, and are widely applied to urban construction engineering due to the characteristics of recycling, low environmental pollution, high construction efficiency and the like. As a recyclable and reusable structure, the construction process inevitably needs a pile pulling stage, and the engineering problems caused by the pile pulling stage are not different, such as the soil around the pile is disturbed due to high-frequency vibration, so that the soil is degraded; when the pile is pulled out, the pile hole is not filled in time, so that the soil body is collapsed, uneven settlement of the earth surface is caused, and the adjacent building is seriously damaged. In addition, adjacent steel sheet piles are connected together through the locking notch to form a steel sheet pile wall, however, the locking notch can form a locking and embedding effect when the piles are pulled out, so that the friction force between the adjacent piles is too large, and the difficulty of pile pulling is increased.
Aiming at the related technologies, the inventor thinks that the defect that the pile hole cannot be filled in time after pile pulling exists.
Disclosure of Invention
In order to solve the problems in the background technology, the invention provides a steel sheet pile which can be disassembled and can be synchronously grouted in the pile pulling process and a using method thereof.
The invention provides a steel sheet pile which can be disassembled and can synchronously slip cast in the pile pulling process, which adopts the following technical scheme:
the utility model provides a can dismantle, steel sheet pile that pile pulling process can be synchronous slip casting, includes the main part steel sheet, the both sides lock mouth department of main part steel sheet all is equipped with heating mechanism, and the both sides lock mouth department of main part steel sheet all is connected with the plastics makeup, has seted up water injection pipeline in the plastics makeup, and a plurality of apopores that communicate with water injection pipeline are seted up to the lateral wall of plastics makeup, and the medial surface welding of main part steel sheet has the slip casting passageway, and slip casting passageway top and bottom loose-leaf connection have upper cover plate and lower apron respectively.
Preferably, the cross section of the main body steel plate is provided in a U-shaped configuration.
Preferably, a plurality of bolts are respectively arranged on two sides of the main steel plate, and the end parts of the bolts are connected with the plastic splicing plates through a hot processing technology.
Preferably, the heating mechanism comprises a resistance wire, the resistance wire is arranged along the whole length of the locking notch of the main body steel plate and is in welded connection with the main body steel plate, and a converter connected with the resistance wire is arranged at the top of the main body steel plate.
Preferably, the top of the main steel plate is provided with a placing groove, and the converter is arranged in the placing groove.
Preferably, the top of standing groove and water injection pipeline all is equipped with the plug.
Preferably, the bottom end of the grouting channel is provided with a tapered variable cross-section form.
Preferably, the lower cover plate is welded with a steel strand, and the other end of the steel strand is welded at the lower end of the upper cover plate of the grouting channel.
Preferably, the plastic jointed boards are made of PVC.
The application method of the steel sheet pile capable of being disassembled and synchronously grouted in the pile pulling process, provided by the embodiment of the invention, comprises the following steps:
s1, before pile pulling, the rubber plug at the top of the plastic jointed board is opened, water is injected into the water injection pipeline inside the plastic jointed board through the external water pipe, water flows enter the soil from the water outlet hole in the side face of the plastic jointed board, and a soil body can play a role in lubrication after being wetted, so that the friction effect among pile soil is weakened.
And S2, stopping water injection, connecting an external power supply through a converter to heat the resistance wires to melt the plastic jointed boards, separating the plastic jointed boards from the main steel plate, and simultaneously opening an upper cover plate of the grouting channel to cut off the steel strands in a tight state.
And S3, disconnecting the external power supply, leading the grouting pipe to the pile tip position along the grouting channel, starting pile pulling equipment, starting a grouting pump after pulling up a certain height, opening the lower cover plate under the action of slurry impact, and filling the hole in time when the main steel plate rises.
And S4, after the whole main steel plate 1 is pulled out, timely cleaning and pulling out the next main steel plate, and circulating S1, S2 and S3 until all the steel plate piles are removed.
In summary, the invention has the following beneficial technical effects:
1. the invention can conveniently drop the plastic jointed board, thereby greatly reducing the lock-embedding effect generated between adjacent piles;
2. the invention can realize synchronous grouting during pile pulling, can avoid the problem of hole collapse, further can not cause the problem of uneven settlement of the ground, and can be normally used for adjacent roads and building structures;
3. the invention replaces the original steel plate at the lock opening with the plastic jointed board, thereby greatly reducing the cost of the steel sheet pile while realizing the beneficial effect of pile pulling, and only replacing the steel plate at the lock opening can ensure the integral strength.
Drawings
Fig. 1 is a schematic structural diagram of a steel sheet pile that can be disassembled and synchronously grouted in a pile pulling process according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a main steel plate of a steel plate pile which is detachable and can be synchronously grouted in a pile pulling process according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a plastic jointed board of a steel sheet pile that can be disassembled and synchronously grouted in a pile pulling process according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a water injection pipeline and a water outlet hole of a steel sheet pile, which can be disassembled and synchronously grouted in a pile pulling process according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a detachable converter for steel sheet piles that can be synchronously grouted during pile pulling according to an embodiment of the present invention;
fig. 6 is a schematic structural view of a grouting channel of a steel sheet pile that can be disassembled and synchronously grouted in a pile pulling process according to an embodiment of the present invention;
description of reference numerals: 1. a main body steel plate; 101. a bolt; 102. a placement groove; 103. a rubber plug; 2. a heating mechanism; 201. a resistance wire; 202. a converter; 3. plastic splicing plates; 301. a water injection pipeline; 302. a water outlet hole; 4. grouting a channel; 401. an upper cover plate; 402. a lower cover plate; 403. and (5) steel strands.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It is to be noted that the drawings are merely illustrative and not to be drawn to strict scale, and that there may be some enlargement and reduction for the convenience of description, and there may be some default to the known partial structure.
The embodiment of the invention discloses a steel sheet pile which can be disassembled and can be synchronously grouted in a pile pulling process. Referring to fig. 1-6, a detachable steel sheet pile capable of being synchronously grouted in pile pulling process comprises a main steel sheet 1, heating mechanisms 2 are arranged at locking notches at two sides of the main steel sheet 1, plastic jointed boards 3 are connected at the locking notches at two sides of the main steel sheet 1, the heating mechanisms 2 are used for melting the plastic jointed boards 3, steel at the locking notches of the existing steel sheet pile is replaced by plastic, a specific mold is adopted for manufacturing the plastic jointed boards 3 during molding, water injection pipelines 301 are arranged in the plastic jointed boards 3, a plurality of water outlet holes 302 communicated with the water injection pipelines 301 are arranged on the side walls of the plastic jointed boards 3, the detachable steel sheet pile pulling process is mainly used for injecting water to soil around the pile during construction process to weaken friction of the pile soil, bolts 101 are arranged at the contact surface of the main steel sheet 1 and the plastic jointed boards 3, one end of each bolt is connected with the main steel sheet 1, the other end of each bolt is connected with the plastic jointed boards 3 through a hot working process during molding of the plastic jointed boards 3, the inside welding of main part steel sheet 1 has slip casting passageway 4, and slip casting passageway 4 top and bottom loose joint have upper cover plate 401 and lower apron 402 respectively.
Referring to fig. 1, the main steel plate 1 is made of the same material as that of a conventional steel sheet pile, and the difference is that the steel plate at the lock opening is removed, the section of the main steel plate 1 is approximately U-shaped, and compared with the conventional steel sheet pile, the steel required by the main steel plate is less, and especially in the super-large deep and long project, the advantage of saving steel is further embodied.
Referring to fig. 2, the bolt 101 is made of stainless steel, the strength grade of the bolt 101 is 5.6 grade only as a connecting member, the main body of the bolt 101 is connected in the main steel plate 1 and can be detached, the head of the bolt 101 is exposed outside, and the head of the bolt 101 is embedded in the main steel plate 1 when the plastic jointed board 3 is poured, so that the main steel plate 1 and the plastic jointed board 3 are spliced.
Referring to fig. 3, the plastic jointed board 3 is made of PVC, the steel plate at the lock opening of the conventional steel sheet pile is replaced with plastic, and the plastic jointed board 3 is manufactured by using a specific mold during molding.
Referring to fig. 5, the heating mechanism 2 includes a resistance wire 201, the resistance wire 201 is arranged along the fore shaft of the main body steel plate 1, and is welded connection with the main body steel plate 1, a converter 202 connected with the resistance wire 201 is arranged on the top of the main body steel plate 1, an external power supply is connected with the converter 202, the converter 202 provides electric energy when heating the resistance wire 201, a placing groove 102 is opened on the top of the main body steel plate 1, and the converter 202 is arranged in the placing groove 102.
Referring to fig. 4 and 5, the rubber stopper 103 is provided on the top ends of the placing groove 102 and the water injection pipeline 301.
Referring to fig. 6, the bottom end of the grouting channel 4 is in a tapered variable cross-section form, steel strands 403 are welded to a lower cover plate 402, the other ends of the steel strands 403 are welded to the lower end of an upper cover plate 401 of the grouting channel 4, the size of the grouting channel 4 is determined according to the diameter of a grouting pipe in a specific construction process, the grouting channel 4 is tapered at a position close to a pile tip, and resistance in a steel sheet pile injection process can be reduced. Meanwhile, the grouting channel 4 is provided with an upper cover plate 401 and a lower cover plate 402, the upper cover plate 401 can prevent water flow from entering, the lower cover plate 402 is welded with steel strands 403, the other ends of the steel strands 403 are welded near the lower end of the upper cover plate 401 of the grouting channel 4, the lower cover plate 402 is hermetically connected with the grouting channel 4 through the steel strands 403 in a tight state, the soil body can be prevented from entering the grouting channel 4 in the penetration process to form a soil plug effect, and the upper cover plate 401, the lower cover plate 402 and the grouting channel 4 are connected through hinges.
The application method of the steel sheet pile capable of being disassembled and synchronously grouted in the pile pulling process, provided by the embodiment of the invention, comprises the following steps:
s1, before pile pulling, the rubber plug 103 at the top of the plastic jointed board 3 is opened, water is injected into the water injection pipeline 301 inside the plastic jointed board 3 through the external water pipe, water flows enter the soil from the water outlet hole 302 on the side surface of the plastic jointed board 3, and a soil body can play a lubricating role after being wetted, so that the friction effect among pile soil is weakened.
And S2, stopping injecting water, connecting the converter 202 with an external power supply to heat the resistance wire 201 to melt the plastic jointed boards 3, separating the plastic jointed boards 3 from the main steel plate 1, opening the grouting channel 3 upper cover plate 401, and cutting off the steel stranded wires 403 in a tight state.
S3, disconnecting the external power supply, leading the grouting pipe to the pile tip position along the grouting channel 4, starting pile pulling equipment, starting a grouting pump after pulling up a certain height, opening the lower cover plate 402 under the action of slurry impact, and filling the hole in time when the main steel plate 1 rises.
And S4, after the whole main steel plate 1 is pulled out, timely cleaning and pulling out the next main steel plate 1, and circulating S1, S2 and S3 until all the steel plate piles are removed.
The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, 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 (10)
1. The utility model provides a can dismantle, pile pulling process steel sheet pile of slip casting in step, includes main part steel sheet (1), its characterized in that: the both sides fore shaft department of main part steel sheet (1) all is equipped with heating mechanism (2), the both sides fore shaft department of main part steel sheet (1) all is connected with plastics makeup (3), water injection pipeline (301) have been seted up in plastics makeup (3), apopore (302) a plurality of and water injection pipeline (301) intercommunication are seted up to the lateral wall of plastics makeup (3), the medial surface welding of main part steel sheet (1) has slip casting passageway (4), slip casting passageway (4) top and bottom are loose-leaf connection respectively have upper cover plate (401) and lower apron (402).
2. The steel sheet pile capable of being disassembled and synchronously grouted in the pile pulling process according to claim 1, is characterized in that: the cross section of the main steel plate (1) is of a U-shaped structure.
3. The steel sheet pile capable of being disassembled and synchronously grouted in the pile pulling process according to claim 1, is characterized in that: the main part steel sheet (1) both sides are equipped with a plurality of bolts (101) respectively, bolt (101) tip is through hot working process realization and the connection of plastics makeup (3).
4. The steel sheet pile capable of being disassembled and synchronously grouted in the pile pulling process according to claim 1, is characterized in that: the heating mechanism (2) comprises a resistance wire (201), the resistance wire (201) is arranged along the whole length of a lock opening of the main steel plate (1), the resistance wire is in welded connection with the main steel plate (1), and a converter (202) connected with the resistance wire (201) is arranged at the top of the main steel plate (1).
5. The steel sheet pile capable of being disassembled and synchronously grouted in the pile pulling process according to claim 4, is characterized in that: the top of the main steel plate (1) is provided with a placing groove (102), and the converter (202) is arranged in the placing groove (102).
6. The steel sheet pile capable of being disassembled and synchronously grouted in the pile pulling process according to claim 5, is characterized in that: the top ends of the placing groove (102) and the water injection pipeline (301) are both provided with rubber plugs (103).
7. The steel sheet pile capable of being disassembled and synchronously grouted in the pile pulling process according to claim 1, is characterized in that: the bottom end of the grouting channel (4) is in a tapered variable cross-section form.
8. The steel sheet pile capable of being disassembled and synchronously grouted in the pile pulling process according to claim 1, is characterized in that: the lower cover plate (402) is welded with a steel strand (403), and the other end of the steel strand (403) is welded at the lower end of the upper cover plate (401) of the grouting channel (4).
9. The steel sheet pile capable of being disassembled and synchronously grouted in the pile pulling process according to claim 1, is characterized in that: the plastic jointed board (3) is made of PVC.
10. The use method of the steel sheet pile capable of being disassembled and synchronously grouted in the pile pulling process according to any one of claims 1 to 9, is characterized in that:
s1, before pile pulling, the rubber plug (103) at the top of the plastic jointed board (3) is opened, water is injected into the water injection pipeline (301) inside the plastic jointed board (3) through the external water pipe, water flows enter the soil from the water outlet hole (302) in the side surface of the plastic jointed board (3), and a soil body can play a role in lubrication after being wetted, so that the friction effect among pile soil is weakened;
s2, stopping water injection, communicating an external power supply through a converter (202) to heat the resistance wire (201) to melt the plastic jointed board (3), separating the plastic jointed board (3) from the main steel plate (1), opening the grouting channel (3) and the upper cover plate (401), and cutting off the steel strand (403) in a tight state;
s3, disconnecting the external power supply, leading the grouting pipe to the pile tip position along the grouting channel (4), starting pile pulling equipment, starting a grouting pump after pulling up for a certain height, opening the lower cover plate (402) under the action of slurry impact, and filling the hole in time when the main steel plate (1) rises;
s4, after the whole main steel plate (1) is pulled out, timely cleaning and pulling out the next main steel plate (1), and circulating S1, S2 and S3 until all steel plate piles are removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210488499.XA CN114892639A (en) | 2022-05-06 | 2022-05-06 | Steel sheet pile capable of being disassembled and synchronously grouted in pile pulling process and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210488499.XA CN114892639A (en) | 2022-05-06 | 2022-05-06 | Steel sheet pile capable of being disassembled and synchronously grouted in pile pulling process and using method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN114892639A true CN114892639A (en) | 2022-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210488499.XA Pending CN114892639A (en) | 2022-05-06 | 2022-05-06 | Steel sheet pile capable of being disassembled and synchronously grouted in pile pulling process and using method thereof |
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| Country | Link |
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| CN (1) | CN114892639A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115450238A (en) * | 2022-10-12 | 2022-12-09 | 中建八局西北建设有限公司 | Steel sheet pile easy to pull out and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201172820Y (en) * | 2007-12-14 | 2008-12-31 | 卢锡雷 | Tied joggle pile mould tube with lubricating valve pile toe |
| CN103061338A (en) * | 2013-02-04 | 2013-04-24 | 苏州市能工基础工程有限责任公司 | Composite steel capable of conveniently recovering core material and recovering method of composite steel |
| CN108978635A (en) * | 2018-07-05 | 2018-12-11 | 南京工业大学 | A kind of synchronous grouting steel sheet pile and application method |
| CN208844543U (en) * | 2018-09-30 | 2019-05-10 | 庞贵春 | It is a kind of convenient for pile pulling can slip casting steel sheet pile |
| KR102382616B1 (en) * | 2021-05-26 | 2022-04-08 | 이성희 | Temporary earth retaining structure and construction method thereof |
-
2022
- 2022-05-06 CN CN202210488499.XA patent/CN114892639A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201172820Y (en) * | 2007-12-14 | 2008-12-31 | 卢锡雷 | Tied joggle pile mould tube with lubricating valve pile toe |
| CN103061338A (en) * | 2013-02-04 | 2013-04-24 | 苏州市能工基础工程有限责任公司 | Composite steel capable of conveniently recovering core material and recovering method of composite steel |
| CN108978635A (en) * | 2018-07-05 | 2018-12-11 | 南京工业大学 | A kind of synchronous grouting steel sheet pile and application method |
| CN208844543U (en) * | 2018-09-30 | 2019-05-10 | 庞贵春 | It is a kind of convenient for pile pulling can slip casting steel sheet pile |
| KR102382616B1 (en) * | 2021-05-26 | 2022-04-08 | 이성희 | Temporary earth retaining structure and construction method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115450238A (en) * | 2022-10-12 | 2022-12-09 | 中建八局西北建设有限公司 | Steel sheet pile easy to pull out and construction method thereof |
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