Anti-slide pile for roadbed construction

By introducing a combination structure of metal breakthrough components, connecting adjustment components, and clamping connectors into the anti-slide pile, the problem of easy cracking or breakage of the pile body during pile driving is solved, and the stable connection and convenient clamping of the pile body are achieved, thereby improving construction efficiency and safety.

CN121992802AActive Publication Date: 2026-05-08CHINA RAILWAY GUIZHOU ENG CORP LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA RAILWAY GUIZHOU ENG CORP LTD
Filing Date
2026-04-09
Publication Date
2026-05-08

AI Technical Summary

Technical Problem

The existing anti-slide piles used in roadbed construction lack effective pile driving protection measures. The piles are prone to cracking or breaking during the pile driving process. The pile clamps are difficult to directly clamp the stacked piles, resulting in poor connection stability.

Method used

The structure adopts a combination of metal punch, connecting adjustment and clamping connection, including metal punch, docking groove block and threaded connecting pipe. The pile driving pressure is borne by the pile driving pipe, and the docking groove block and insert block improve the connection integrity of the pile body. The connecting adjustment and clamping connection protect the pile body, reduce the risk of breakage and facilitate the clamping of the pile clamp.

Benefits of technology

It effectively protects the pile body, reduces the risk of breakage, improves construction quality and safety, enhances the stability of pile connection, facilitates stacking, transportation and clamping, and reduces the need for manual adjustment.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention provides an anti-slide pile for roadbed construction, and relates to the technical field of anti-slide plate piles, the anti-slide pile comprises a pile body part, and a metal breakthrough part is mounted on the pile body part; the metal breakthrough piece is used for being inserted into the ground; a connecting adjusting piece is mounted on the pile body piece; a clamping connecting piece is mounted on the pile body piece, and the clamping connecting piece is mounted on the connecting adjusting piece; the clamping connecting piece is used for protecting the pile body piece; the connecting adjusting piece is used for adjusting the position of the clamping connecting piece; a fastening prompting piece is mounted on the clamping connecting piece; the mode that the clamping connecting piece is connected with the metal punch is adopted, main piling pressure is borne through the pile pressing pipe, a pile body can be protected, and the risk that the pile body cracks or fractures is reduced; the problems that an existing anti-slide pile for roadbed construction is lack of effective pile driving protection measures, and a stacked pile clamping device is difficult to directly clamp are solved.
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Description

Technical Field

[0001] This invention relates to the field of anti-slide pile technology, and more particularly to an anti-slide pile for roadbed construction. Background Technology

[0002] In actual roadbed construction, when the roadbed is located on a collapsible slope or near water, it is usually necessary to install anti-slide piles before roadbed construction to prevent landslides. The function of anti-slide piles is to form a retaining wall after penetrating deep into the ground to maintain the stability of the roadbed. Because anti-slide piles need to be left for a long time for anti-slide work, concrete anti-slide piles are usually used. At present, anti-slide piles used in roadbed construction are usually driven by directly clamping the pile body with a pile clamp. When the pile driving pressure is large, the concrete pile body is very easy to crack or even break directly. There is a lack of effective pile driving protection measures. At the same time, traditional concrete anti-slide piles are usually transported by vehicle in stacks. After the piles are stacked, it is difficult for the pile clamp to be directly clamped. It is necessary to manually adjust with a crowbar to pry the pile body to be clamped out of the stack before the pile clamp can complete the clamping operation. The workload is large and it is easy to damage the concrete sheet piles. In addition, traditional concrete anti-slide piles only rely on the grooves on their own sides to achieve the insertion of adjacent pile bodies, and the connection stability between pile bodies is poor. Summary of the Invention

[0003] This disclosure relates to an anti-slide pile for roadbed construction, which solves the problem that current anti-slide piles for roadbed construction lack effective pile driving protection measures and that stacked pile clamps are difficult to directly clamp.

[0004] In a first aspect, this disclosure provides an anti-slide pile for roadbed construction, specifically comprising a pile body component, wherein a metal penetration member is installed on the pile body component; the metal penetration member is used for insertion into the ground; a connecting adjustment member is installed on the pile body component; a clamping connector is installed on the pile body component and is mounted on the connecting adjustment member; the clamping connector is used to protect the pile body component; the connecting adjustment member is used to adjust the position of the clamping connector; a fastening reminder member is installed on the clamping connector; the pile body component includes: a pile body and a raised retaining strip, wherein a reinforcing cage is provided inside the pile body; a raised retaining strip is provided on the side of the pile body; three through holes are provided on the pile body; the pile body is used to resist soil landslides.

[0005] In at least some embodiments, the pile body component includes: a limiting groove, wherein the limiting groove is formed on the pile body and the position of the limiting groove corresponds to the protruding retaining strip.

[0006] In at least some embodiments, the metal punch includes: a metal punch, a mating groove block, and a threaded connecting pipe. The metal punch is fixedly connected to the end of the reinforcing cage on the pile body. The metal punch is located at the bottom end of the pile body. The metal punch and the pile body are integrally cast. The mating groove block is fixedly installed on the side of the metal punch by bolts, and the mating groove block has a slot. The threaded connecting pipe is fixedly installed on the metal punch and is inserted into the pile body.

[0007] In at least some embodiments, the metal breakthrough component further includes: a mating block, which is fixedly installed on the bottom of the metal punch by bolts; the bottom edge of the mating block is chamfered; the mating block is used to insert into an adjacent mating slot block; and the mating block and the side of the metal punch are spaced apart.

[0008] In at least some embodiments, the connecting adjustment component includes: a connecting post, a mating stud, and a telescopic stud; the connecting post is slidably inserted into the pile body; the connecting post is located above the threaded connecting pipe; a mating stud is fixedly installed on the connecting post; a telescopic stud is fixedly installed at the bottom of the connecting post, and the bottom of the connecting post is provided with a hexagonal groove; the telescopic stud is threadedly connected to the threaded connecting pipe; the telescopic stud passes through a metal punch; the bottom of the telescopic stud is used to connect a nut; and the telescopic stud is used to compensate for the propulsion clamping shell.

[0009] In at least some embodiments, the clamping connector includes: a pile driving pipe, a lower pressure plate, and a clamping shell. The pile driving pipe has threads at its bottom. The pile driving pipe is inserted into the pile body. The bottom of the pile driving pipe is threadedly connected to a mating stud. The lower pressure plate is fixedly installed on the top of the pile driving pipe. The clamping shell is slidably sleeved on the pile driving pipe. The lower pressure plate has a hexagonal hole at its top. The clamping shell is used to connect with the pile clamping device.

[0010] In at least some embodiments, the clamping connector further includes: an upper cover, which is fixedly mounted on the pile driving pipe by bolts; the bottom of the upper cover is attached to the lower pressure plate; a rubber pad is provided at the bottom of the pile driving pipe; and a rubber pad is provided on the upper cover.

[0011] In at least some embodiments, the clamping connector further includes: a battery and an indicator light, wherein the battery is fixedly mounted on the pile driving pipe; the indicator light is fixedly mounted on the pile driving pipe; and the battery is electrically connected to the indicator light.

[0012] In at least some embodiments, the fastening reminder includes a stop cylinder, which is fixedly installed inside the pile driving pipe.

[0013] In at least some embodiments, the fastening indicator further includes: a micro switch, wherein a micro switch is fixedly installed inside the stop cylinder; the micro switch is electrically connected to the battery and the indicator light; and the end of the micro switch is pressed against the mating stud.

[0014] This invention provides an anti-slide pile for roadbed construction, which has the following beneficial effects:

[0015] This invention employs a clamping connector to connect the metal punch, with the pile driving tube bearing the main piling pressure. This protects the pile body, reduces the risk of cracks or breakage, ensures construction quality, and minimizes cost increases and safety hazards caused by breakage. The pile driving tube also provides reinforcement when the pile is lifted by the pile clamp, before one end is completely detached from the ground or below the pile. This prevents breakage caused by bending in the middle when the pile is being clamped from a horizontal to a vertical position. The connecting adjustment piece allows for telescopic adjustment of the pile driving tube, facilitating the removal of the clamping shell and easier clamping by the pile clamp. This design is particularly suitable for stacked piles, eliminating the need for manual adjustment using a pry bar.

[0016] In addition, the use of mating slots and mating inserts facilitates the insertion during actual piling, which can improve the integrity of the connection between adjacent piles and ensure anti-slip quality. The insertion method of using mating slots and mating inserts also facilitates the improvement of stability during pile stacking and transportation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0018] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0019] In the attached diagram:

[0020] Figure 1 A schematic diagram of an integral structure of an anti-slide pile for roadbed construction according to this application is shown;

[0021] Figure 2 A cross-sectional view of the internal structure of an anti-slide pile for roadbed construction according to this application is shown;

[0022] Figure 3 This invention provides a schematic diagram of the stacking of anti-slide piles for roadbed construction.

[0023] Figure 4 A sectional view of the overall structure of the pile component of this application is shown;

[0024] Figure 5 A schematic diagram of the overall structure of the metal breakthrough component of this application is shown;

[0025] Figure 6 A schematic diagram of the overall structure of the connecting adjustment component of this application is shown;

[0026] Figure 7 This application shows Figure 3 Enlarged view of the structure of region C in the middle;

[0027] Figure 8 A cross-sectional view of the installation location of the fastening reminder element of this application is shown;

[0028] Figure 9 A cross-sectional view of the clamping connector structure of this application is shown;

[0029] Figure 10 This application shows Figure 8 Enlarged view of the structure of the F region.

[0030] List of reference numerals

[0031] 1. Pile body components; 101. Pile body; 1011. Raised retaining strip; 1012. Limiting groove; 2. Metal punch; 201. Metal punch; 202. Docking groove block; 203. Threaded connecting pipe; 204. Docking insert; 3. Connecting adjustment components; 301. Connecting post; 302. Docking stud; 303. Telescopic stud; 4. Clamping connecting components; 401. Pile driving pipe; 4011. Lower pressure plate; 402. Clamping shell; 4021. Top cover; 403. Battery; 404. Indicator light; 5. Fastening indicator; 501. Stop cylinder; 502. Micro switch. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1: Please refer to Figures 1 to 10 :

[0034] This invention proposes an anti-slide pile for roadbed construction, comprising a pile body 1, on which a metal penetration member 2 is installed; the metal penetration member 2 is used for insertion into the ground; a connecting adjustment member 3 is installed on the pile body 1; a clamping connector 4 is installed on the pile body 1 and is mounted on the connecting adjustment member 3; the clamping connector 4 is used to protect the pile body 1; the connecting adjustment member 3 is used to adjust the position of the clamping connector 4; a fastening reminder member 5 is installed on the clamping connector 4; the pile body 1 includes: a pile body 101 and a raised retaining strip 1011, the pile body 101 has a steel cage inside; the pile body 101 has a raised retaining strip 1011 on its side; the pile body 101 has three through holes to improve the lightweight effect of the pile body 101; the pile body 101 is used to resist soil landslides.

[0035] In this embodiment, the pile body component 1 includes: a limiting groove 1012, which is provided on the pile body 101 and corresponds to the protruding retaining strip 1011; the metal breakthrough component 2 includes: a metal punch 201, a docking slot block 202, and a threaded connecting pipe 203, wherein the metal punch 201 is fixedly connected to the end of the reinforcing cage on the pile body 101; the metal punch 201 is located at the bottom end of the pile body 101; the metal punch 201 and the pile body 101 are integrally cast; the docking slot block 202 is fixedly installed on the side of the metal punch 201 by bolts, and a slot is provided on the docking slot block 202; the threaded connecting pipe 203 is fixedly installed on the metal punch 201 and is inserted into the pile body 101; the metal breakthrough component 2 also includes: a docking insert 204, which is connected to the pile body 101 by bolts. The metal punch 201 is fixed to the bottom of the metal punch 201 by bolts; the bottom edge of the butt plug 204 is chamfered; the butt plug 204 is used to insert into the adjacent butt groove block 202; the butt plug 204 and the metal punch 201 are spaced apart on the side; the metal punch 201 makes it easier to break through the soil layer and avoids the problem of easy breakage of traditional concrete materials during pile driving; the butt groove block 202 and the butt plug 204 facilitate the insertion during actual pile driving, which can improve the integrity of the connection between adjacent piles 101, ensure anti-slip quality, and avoid the problem of limited concrete strength due to the insertion between the limiting groove 1012 and the protruding clip 1011 alone. At the same time, the insertion method of the butt groove block 202 and the butt plug 204 also facilitates the improvement of stability during the stacking and transportation of piles 101.

[0036] In this embodiment, the connecting adjustment component 3 includes: a connecting post 301, a mating stud 302, and a telescopic stud 303. The connecting post 301 is slidably inserted into the pile body 101; the connecting post 301 is located above the threaded connecting pipe 203; the mating stud 302 is fixedly installed on the connecting post 301; the telescopic stud 303 is fixedly installed at the bottom of the connecting post 301, and the bottom of the connecting post 301 is provided with a hexagonal groove; the telescopic stud 303 is threadedly connected to the threaded connecting pipe 203; the telescopic stud 303 passes through the metal punch 201; the bottom of the telescopic stud 303 is used to connect a nut; the telescopic stud 303 is used to compensate for the propulsion clamping shell 402; clamping... Connector 4 includes: a pile driving pipe 401, a lower pressure plate 4011, and a clamping shell 402. The pile driving pipe 401 has threads at its bottom; the pile driving pipe 401 is inserted into the pile body 101; the bottom of the pile driving pipe 401 is threadedly connected to the mating stud 302; the lower pressure plate 4011 is fixedly installed on the top of the pile driving pipe 401; the clamping shell 402 is slidably sleeved on the pile driving pipe 401; the lower pressure plate 4011 has a hexagonal hole at its top; the clamping shell 402 is used to mate with the pile clamping device; the clamping connector 4 also includes: an upper cover 4021, which is fixedly installed on the pile driving pipe 401 by bolts; the bottom of the upper cover 4021 is attached to the lower pressure plate 4011; the pile driving pipe A rubber pad is provided at the bottom of 401; a rubber pad is provided on the top cover 4021; the metal punch 201 is connected by a clamping connector 4, and the main piling pressure is borne by the pile driving pipe 401, which can effectively protect the pile body 101, reduce the risk of cracks or breakage of the pile body 101, ensure the construction quality of the pile body 101, and reduce the cost increase and safety hazards caused by breakage; the pile driving pipe 401 is reusable, reducing construction costs, and when the pile clamp lifts the pile body 101, before one end of the pile body 101 is completely detached from the ground or below the pile body 101, it can play a reinforcing role, which can prevent the pile body 101 from falling laterally due to the clamping device. When the pile is turned to a vertical position, there is a risk of breakage due to bending in the middle. The pile driving pipe 401 can be quickly and easily installed on the connecting adjustment piece 3. The position of the pile driving pipe 401 can be adjusted by telescoping. It is easy to push out the clamping shell 402 on the pile driving pipe 401 and to clamp it with the pile clamp. It is more suitable for piles 101 stacked on a flatbed truck. It avoids the problem that the piles 101 are stacked and the end protrusion is limited, making it difficult to clamp them quickly with the pile clamp. Usually, manual use of tools such as pry bars is required to separate the piles 101 to be clamped from the adjacent piles 101 to facilitate clamping and reduce the damage rate of the piles 101. There is no need for cumbersome hoisting and transportation of the piles 101.

[0037] In Embodiment 2, based on Embodiment 1, the clamping connector 4 further includes: a battery 403 and an indicator light 404. The battery 403 is fixedly installed on the pile driving pipe 401; the indicator light 404 is fixedly installed on the pile driving pipe 401; the battery 403 is electrically connected to the indicator light 404. The fastening indicator 5 includes: a stop cylinder 501, which is fixedly installed inside the pile driving pipe 401; the fastening indicator 5 also includes: a micro switch 502, which is fixedly installed inside the stop cylinder 501; the micro switch... 502 is electrically connected to battery 403 and indicator light 404; the end of micro switch 502 is pressed against the mating stud 302; the fastening indicator 5 facilitates the detection that the mating stud 302 is fully screwed into the pile driving tube 401, especially for long-term vibration pile driving, to avoid problems such as the mating stud 302 becoming unthreaded if it is not fully screwed into the pile driving tube 401 or becomes loose, which would affect the normal pile driving work. The manual judgment can be made intuitively by the indicator light 404.

[0038] The working principle of this embodiment is as follows: (see attached) Figure 3 As shown, when stacking piles 101, before construction, piles 101 can be hoisted onto a flatbed truck by a crane for stacking. Rubber pads can be placed between piles to provide shock absorption and support. The limiting grooves 1012 and protruding clips 1011 between adjacent piles 101 are interlocked to improve stability. Before driving the pile, when connecting the pile clamp of the pile driver, if the length of the end of the pile to be clamped protruding from the adjacent pile is insufficient to meet the clamping requirements of the pile clamp, the telescopic stud 303 can be manually rotated with a wrench to advance it forward. Then, the pile driving pipe 401 is inserted into the pile 101. The pressure plate 4011 is engaged and rotated with a wrench to make the pile driving pipe 401 threadedly connected to the connecting stud 302. As the connecting stud 302 is fully screwed into the pile driving pipe 401, the connecting stud 302 will press against the stop cylinder 5. 01 and micro switch 502, micro switch 502 can control the indicator light 404 to light up; at this time, the clamping shell 402 and the end of the pile 101 extend a large distance, which is convenient for the pile clamping device to clamp. At this time, the pile 101 can be moved by the pile driver, so that the pile 101 extends out of the stack and separates the current docking block 204 from the adjacent limiting groove 1012; then the telescopic stud 303 can be rotated with a wrench to retract, so that one end of the telescopic stud 303 protrudes from the metal punch 201. A nut is installed on the telescopic stud 303 to tighten it. After the telescopic stud 303 retracts, the pile driving tube 401 is also pulled back, which drives the clamping shell 402 to approach the top of the pile 101. At this time, the connecting column 301 is also close to the top of the metal punch 201; then the pile 101 can be lifted by the pile driver.

[0039] During pile driving, the pile 101 is driven into the designated position after the pile clamping device holds the clamping shell 402. The metal punch 201 breaks the soil, and the pile pressing pipe 401 reduces the impact on the pile 101. Each pile 101 is driven sequentially using the same method, ensuring the limiting groove 1012 and protruding retaining strip 1011 on adjacent piles 101 are in contact. Newly driven piles 101 are inserted into adjacent connecting slots 202 via connecting blocks 204. The verticality of the piles 101 must be checked regularly during pile driving. If a new pile 101 fails to accurately connect with the adjacent connecting slot 202 due to positional shift during downward movement, and pushing the adjacent connecting slot 202 causes excessive downward movement of the adjacent pile 101, the workers must immediately stop pile driving. Correction operations are performed; if the offset is large, workers can directly observe with the naked eye that the adjacent limiting groove 1012 and the pile body 101 cannot fit tightly together, and the verticality is completely substandard; if the docking stud 302 and the pile driving pipe 401 become loose during the piling or transportation process, the docking stud 302 will no longer press against the micro switch 502, at which point the micro switch 502 can control the indicator light 404 to turn off, making it easy for workers to be aware of the situation; after a single pile body is driven, workers can use a wrench to insert the lower pressure plate 4011 and manually rotate the pile driving pipe 401 to remove it from the docking stud 302 for use in the construction of the next pile body 101; if it is necessary to pull out the pile body 101 later, the docking stud 302 left on the pile body 101 can facilitate the re-connection of the pile driving pipe 401 and the extraction of the pile body 101 by the piling machine.

[0040] The following points should be noted in this article:

[0041] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0042] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0043] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure.

Claims

1. An anti-slide pile for roadbed construction, comprising a pile body (1), wherein a metal penetration member (2) is installed on the pile body (1); characterized in that: The metal breakthrough component (2) is used for insertion into the ground; the pile body component (1) is equipped with a connecting adjustment component (3); A clamping connector (4) is installed on the pile body component (1), and the clamping connector (4) is installed on the connecting adjustment component (3); the clamping connector (4) is used to protect the pile body component (1); the connecting adjustment component (3) is used to adjust the position of the clamping connector (4); A fastening reminder (5) is installed on the clamping connector (4); The pile body component (1) includes: a pile body (101) and a protruding retaining strip (1011), wherein a steel cage is provided inside the pile body (101); and a protruding retaining strip (1011) is provided on the side of the pile body (101). The metal breakthrough component (2) includes: a threaded connecting pipe (203); The connecting adjustment component (3) includes: a connecting post (301), a docking stud (302), and a telescopic stud (303). The connecting post (301) is slidably inserted into the pile body (101). The connecting post (301) is located above the threaded connecting pipe (203). The docking stud (302) is fixedly installed on the connecting post (301). The telescopic stud (303) is fixedly installed at the bottom of the connecting post (301), and the bottom of the connecting post (301) is provided with a hexagonal groove. The telescopic stud (303) is threadedly connected to the threaded connecting pipe (203). The telescopic stud (303) passes through the metal punch (201). The bottom of the telescopic stud (303) is used to connect a nut. The telescopic stud (303) is used to compensate for the propulsion clamping shell (402). The clamping connector (4) includes: a pile driving tube (401), a lower pressure plate (4011), and a clamping shell (402). The pile driving tube (401) has a thread at the bottom. The pile driving tube (401) is inserted into the pile body (101). The bottom of the pile driving tube (401) is threaded to the docking stud (302). The lower pressure plate (4011) is fixedly installed on the top of the pile driving tube (401). The clamping shell (402) is slidably sleeved on the pile driving tube (401). The lower pressure plate (4011) has a hexagonal hole at the top. The clamping shell (402) is used to dock with the pile clamping device.

2. The anti-slide pile for roadbed construction according to claim 1, characterized in that, The pile body component (1) includes: a limiting groove (1012), the limiting groove (1012) is provided on the pile body (101), and the position of the limiting groove (1012) corresponds to the protruding retaining strip (1011).

3. The anti-slide pile for roadbed construction according to claim 1, characterized in that, The metal breakthrough component (2) further includes: a metal punch (201) and a docking slot block (202). The metal punch (201) is fixedly connected to the end of the reinforcing cage on the pile body (101). The metal punch (201) is located at the bottom end of the pile body (101). The docking slot block (202) is fixedly installed on the side of the metal punch (201), and a slot is provided on the docking slot block (202). A threaded connecting pipe (203) is fixedly installed on the metal punch (201), and the threaded connecting pipe (203) is inserted into the pile body (101).

4. The anti-slide pile for roadbed construction according to claim 3, characterized in that, The metal breakthrough component (2) further includes: a docking block (204), which is fixedly installed at the bottom of the metal punch (201); the bottom edge of the docking block (204) is chamfered; the docking block (204) is used to insert into an adjacent docking slot block (202).

5. The anti-slide pile for roadbed construction according to claim 1, characterized in that, The clamping connector (4) further includes: an upper cover (4021), which is fixedly installed on the pile driving pipe (401); the bottom of the upper cover (4021) is attached to the lower pressure plate (4011); a rubber pad is provided at the bottom of the pile driving pipe (401); and a rubber pad is provided on the upper cover (4021).

6. The anti-slide pile for roadbed construction according to claim 5, characterized in that, The clamping connector (4) further includes a battery (403) and an indicator light (404), wherein the battery (403) is fixedly installed on the pile driving pipe (401); and the indicator light (404) is fixedly installed on the pile driving pipe (401).

7. The anti-slide pile for roadbed construction according to claim 6, characterized in that, The fastening reminder (5) includes a stop cylinder (501), which is fixedly installed inside the pile driving pipe (401).

8. The anti-slide pile for roadbed construction according to claim 7, characterized in that, The fastening indicator (5) further includes: a micro switch (502), which is fixedly installed inside the stop cylinder (501); the micro switch (502) is electrically connected to the battery (403) and the indicator light (404); the end of the micro switch (502) is pressed and attached to the mating stud (302).

Citation Information

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