An adaptive pull-out pile

Abstract

The present invention discloses an adaptive pull-out pile, comprising a pile body, an expansion mechanism, a push mechanism, a force transmission mechanism and a pile tip, wherein the expansion mechanism is arranged between the pile tip and the pile body, the push mechanism is installed in a groove on the pile body, the push mechanism is connected to the expansion mechanism through the force transmission mechanism, the expansion mechanism comprises an expansion space, a filter, a water storage compartment, a water-absorbing sponge, a thrust plate and a water outlet, the expansion space is arranged between the pile body and the pile tip, the water-absorbing sponge is filled in the expansion space, the water storage compartment and the thrust plate are respectively arranged at both ends of the water-absorbing sponge, the filter is arranged at one end of the expansion space close to the pile body, and the water outlet is opened at one side of the water storage compartment. The present invention automatically adapts to the change of water content in the soil through the built-in expansion mechanism, generates corresponding expansion thrust, and then drives the operation of the entire structure, the pile body can enhance the friction between the pile body and the soil as the soil water content gradually increases, and has strong stability and adaptive ability.

Description

Technical Field

[0001] The invention belongs to the technical field of pull-out piles, in particular to a self-adaptive pull-out pile. Background Art

[0002] As a basic engineering technology, pull-out piles play a key role in construction projects, especially in ensuring the safety of buildings in harsh environments such as earthquakes or other natural disasters. With the rapid development of the civil engineering field, pile foundations have received more and more attention in the construction of high-rise buildings, port terminals and other projects. As an important form of pile foundation, the application scope of pull-out piles is gradually expanding, including anti-floating pile foundations in underground spaces such as underground garages, shopping malls, and storage warehouses, pile foundations of offshore oil drilling platforms and offshore dock platforms, anchor pile foundations of bridges, and building foundations on special rock and soil foundations.

[0003] Existing pull-out piles have many shortcomings during use. They cannot actively adapt to changes in soil moisture content, and the operation process is cumbersome and complicated. Especially when the soil moisture content increases, the pull-out force of the pull-out piles may not be effectively improved, resulting in a significant decrease in the pull-out performance. This performance defect may lead to a series of serious consequences. When the soil moisture content increases, the physical properties of the soil will change significantly. If the pull-out piles cannot adapt to these changes, the friction between the pile body and the soil will be greatly reduced, which will seriously affect the stability of the pile body. Summary of the invention

[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, the purpose of the present invention is to provide an adaptive pull-out pile that can automatically adapt to changes in soil moisture content and simplify the operation process, thereby significantly improving the stability and use efficiency of the pull-out pile.

[0005] Technical solution: An adaptive pull-out pile of the present invention comprises a pile body, an expansion mechanism, a pushing mechanism, a force transmission mechanism and a pile tip, wherein the expansion mechanism is arranged between the pile tip and the pile body, the pushing mechanism is installed in a groove on the pile body, and the pushing mechanism is connected to the expansion mechanism through the force transmission mechanism; the expansion mechanism comprises an expansion space, a filter screen, a water storage compartment, a water absorbent sponge, a thrust plate and a water outlet, the expansion space is arranged between the pile body and the pile tip, the water absorbent sponge is filled in the expansion space, the water storage compartment and the thrust plate are respectively arranged at both ends of the water absorbent sponge, the filter screen is arranged at one end of the expansion space close to the pile body, and the water outlet is opened on one side of the water storage compartment. The pile body is the main load-bearing part of the pull-out pile, which is responsible for transferring the load of the upper structure to deep underground and using the bearing capacity of the soil layer to resist the pull-out force. After the pile body is pushed into the soil, the expansion mechanism increases the friction between the pile body and the soil by absorbing water and swelling, thereby improving the pull-out resistance of the pile. The pushing mechanism is responsible for pushing the rod into the soil to enhance the pull-out effect of the pull-out pile. The force transmission mechanism is responsible for transferring the force generated by the expansion mechanism to the pushing mechanism, thereby driving the pushing mechanism to work. The pile tip is the structure at the bottom of the pile body, which is responsible for guiding the pile body to enter the soil layer smoothly and reducing the resistance during the pushing process.

[0006] Furthermore, there are two expansion mechanisms, which are symmetrically distributed on both sides of the pile body. A triangular barb is provided at the bottom of the thrust plate, and a mounting groove is provided at the bottom of the expansion space. A spring is installed on the inner side of the mounting groove, and the top of the spring is connected to the triangular barb. The filter screen prevents soil impurities from entering the expansion space, ensuring that the water-absorbing sponge can effectively absorb water and expand. The water storage compartment stores the water that enters the device when the water content is stable. The soil itself contains a certain water content. After the pile is formed, the water will gradually penetrate into the space of the expansion mechanism. Only when the water content rises and the water storage compartment is full of water, will the water enter the water-absorbing sponge through the upper water outlet. The water-absorbing sponge is the core component of the expansion mechanism. Once it absorbs enough water, it will expand rapidly and generate a strong thrust. This thrust will drive the movement of the entire structure, thereby enhancing the close combination of the pile body and the soil body and improving the pull-out resistance of the pile. In order to prevent the water-absorbing sponge from shrinking when the water content decreases and further enhance the overall stability, a retractable sponge is designed on the other side of the expansion mechanism. The compressed triangular barbs play a key role in the structure. When the moisture content is stable and the water storage compartment can still carry the moisture of the soil, the entire structure is in the initial state and the thrust plate has not yet touched the triangular barbs. At this time, the barbs pop out due to the action of the lower spring and are placed outside the installation slot. When water enters, thrust begins to be generated, and the thrust plate gradually moves toward the barbs, pressing the triangular barbs into the installation slot. At this time, the spring will contract. As the moisture content continues to rise, the amount of water entering the expansion mechanism continues to increase, the water-absorbing sponge continues to expand, and thrust continues to be generated. The thrust plate continues to move. Every time a triangular barb is pressed, the barb will pop up and jam the thrust plate due to the action of the installation slot. In this way, the thrust plate cannot move in the opposite direction, thereby greatly increasing the overall stability.

[0007] Furthermore, the push-in mechanism and the force transmission mechanism are evenly arranged on the pile body in the form of two-layer symmetrical distribution, and four push-in mechanisms and four force transmission mechanisms are provided. Each push-in mechanism is equipped with an insertion rod, which is not only convenient for insertion into the soil, but also can effectively increase the overall pull-out resistance.

[0008] Furthermore, the pushing mechanism includes an insert rod, an adaptive barb, a movable plate, a connecting rod, a fixed plate, a movable space and a buckle. The insert rod is arranged on the inner side of the groove, the movable space is opened on the insert rod, the movable plate and the fixed plate are both installed in the inner cavity of the movable space, and one end of the adaptive barb is connected to the insert rod through a roller. One end of the connecting rod is connected to the movable plate through a roller, and the other end of the connecting rod is connected to the adaptive barb. The buckle is arranged on the inner wall of the groove, and the protruding part of the movable plate can collide with the buckle. The top of the insert rod is conical, the number of the groove matches that of the pushing mechanism, the shape of the groove is cylindrical, and it penetrates into the inner cavity of the pile body, and the buckle is located at one end of the inner wall of the groove close to the soil, and the number is two. When the expansion mechanism generates thrust to act on the pushing mechanism, the pushing mechanism will first slowly push the insertion rod into the soil. As the water content increases, the pushing mechanism will further push the moving plate to collide with the buckle in the groove, thereby driving the adaptive barb to unfold. In this process, the adaptive barb can automatically adapt to the conditions in the soil, increase the friction between the pull-out pile and the soil, and thus enhance the stability of the pull-out pile. When the device is fully unfolded, the thrust plate will be stuck next to the triangular barb on the edge, and the adaptive barb will also reach the optimal unfolding state. At this time, the entire device has been fully stretched and the pull-out resistance has reached the highest value.

[0009] Furthermore, the force transmission mechanism includes a force transmission rod, a trapezoidal body, a gear, a toothed chain, a fixed cylinder and a sleeve. One end of the force transmission rod is hinged to the thrust plate, and the other end of the force transmission rod is hinged to the sleeve. The gear is arranged at the bottom end of the insertion rod, the fixed cylinder is arranged in the inner cavity of the pile body, the sleeve is arranged on the outside of the fixed cylinder, the trapezoidal body is arranged on the outside of the sleeve, the toothed chain is arranged on the surface of the trapezoidal body, and the gear is meshed with the toothed chain. The force transmission mechanism is closely matched with the expansion mechanism through the hinge, and the power transmission is realized through the gear and the pushing mechanism. The trapezoidal body and the sleeve are designed as an integrated body, so that the force transmission process is more stable and reliable. The width of the gear is slightly smaller than the width of the pushing mechanism, and perfectly fits the width of the toothed chain, ensuring the smoothness of the transmission. At the same time, the groove design of the toothed chain is slightly smaller than the radius of the gear, avoiding the possibility of the trapezoidal body being stuck.

[0010] The outer periphery of the trapezoidal body adopts an arc design, and the hypotenuse and the bottom edge of the cross-section are 45°. This angle design is both beautiful and practical, ensuring the vertical angle between the push-in mechanism and the trapezoidal body, further enhancing the stability of the structure. The relationship between the height of the trapezoidal body and the depth of the insertion rod into the soil is as follows:

[0011]

[0012] in, The depth of insertion into the soil, is the height of the trapezoidal main body. It is the distance from the bottom of the force transfer rod to the center position.

[0013] Working principle: First, in the initial state, all parts of the pull-out pile are in the preset position, the absorbent sponge is dry and not expanded, the thrust plate is not in contact with the triangular barb, the insertion rod of the pushing mechanism is not inserted into the soil, and the adaptive barb is in a contracted state. When the pull-out pile is pushed into the soil, as the soil moisture content increases, the water enters the water storage compartment of the expansion mechanism through the filter net, and then flows into the absorbent sponge. The absorbent sponge absorbs water and expands, generating thrust to push the thrust plate to move. During the movement of the thrust plate, it gradually contacts and compresses the triangular barb, and the triangular barb is pressed into the installation groove. At the same time, the spring is compressed to ensure that the thrust plate can only move in one direction, thereby enhancing the overall stability. The thrust plate transmits the thrust to the force transmission rod of the force transmission mechanism through a hinge. The rod is then transmitted to the sleeve, and after smooth transmission through the trapezoidal body and the toothed chain, it finally acts on the gear of the pushing mechanism. This design avoids jamming during transmission and ensures smooth transmission. After the pushing mechanism receives the force, the rod begins to gradually insert into the soil. During the penetration of the rod, the moving plate collides with the buckle in the groove, causing the adaptive barb to unfold, increasing the friction between the rod and the soil. The adaptive barb can automatically adjust the degree of unfolding according to soil conditions to achieve the best anti-pullout effect. As the water-absorbing sponge continues to expand, the rod reaches the maximum insertion depth and the adaptive barb is fully unfolded. At this time, the pull-out pile is fully stretched and the pull-out force reaches the highest value. This adaptive mechanism enables the pull-out pile to perform at its best anti-pullout performance under different soil conditions.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following significant features:

[0015] 1. The built-in expansion mechanism automatically adapts to the change of soil moisture content, generates corresponding expansion thrust, and then drives the operation of the entire structure. After the construction is completed, no additional operation is required. The friction between the pile and the soil will increase as the soil moisture content gradually increases, significantly improving the stability of the pull-out pile and showing excellent adaptive ability;

[0016] 2. By using the hinged connection between the force transmission rods and connecting the trapezoidal main body with the gear of the push-in mechanism, the insertion rod of the push-in structure is inserted obliquely into the soil. As the moisture content further increases, the pull-out barbs will automatically unfold to form a more stable adaptive pull-out pile. The push-in mechanism adopts a symmetrical layout to ensure uniform distribution of pull-out force, effectively increase the friction between the pile body and the soil, and effectively prevent the pile body from sliding longitudinally;

[0017] 3. The triangular barbs, mounting grooves and springs carefully designed at the bottom of the expansion mechanism work together to ensure the stability of the pile position and make the push-in mechanism more stable and reliable, providing the entire pull-out pile with excellent self-adaptability and pull-out resistance. When the thrust plate gradually applies pressure, these barbs will flexibly bounce up, effectively increasing the friction between the pile and the soil. When the thrust plate tries to retract, the barbs will quickly get stuck, generating strong resistance to prevent unnecessary sliding of the internal structure.

[0018] 4. Through reasonable layout and quantity setting, the expansion mechanism, pushing mechanism and force transmission mechanism in the present invention can work together to improve the pull-out resistance and stability of the pull-out piles, so that the pull-out piles can adapt to different engineering needs and improve the safety and reliability of civil engineering structures. At the same time, the optimized operation process also greatly improves the construction convenience and effectively shortens the construction period of the pull-out piles. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the present invention when the pull-out resistance reaches the peak;

[0021] Figure 3 is a cross-sectional view of a pile body 1 of the present invention;

[0022] Figure 4 It is a partial structural schematic diagram of the expansion mechanism 2 of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the pushing mechanism 3 of the present invention;

[0024] Figure 6 It is a partial structural schematic diagram of the force transmission mechanism 4 of the present invention;

[0025] Figure 7 It is a schematic diagram of the connection between the triangular barb 7 and the spring 9 of the present invention. DETAILED DESCRIPTION

[0026] like Figure 1~2The self-adaptive pull-out pile comprises a pile body 1, an expansion mechanism 2, a pushing mechanism 3, a force transmission mechanism 4 and a pile tip 5. The expansion mechanism 2 is arranged between the pile tip 5 and the pile body 1. The pushing mechanism 3 is installed in a groove 6 on the pile body 1. The pushing mechanism 3 is connected to the expansion mechanism 2 through the force transmission mechanism 4. The pile body 1 is the main bearing part of the pull-out pile, which is responsible for transmitting the load of the upper structure to the deep underground and using the bearing capacity of the soil layer to resist the pull-out force. After the pile body is pushed into the soil, the expansion mechanism 2 increases the friction between the pile body and the soil body by absorbing water and swelling, thereby improving the pull-out resistance of the pile. The pushing mechanism 3 is responsible for pushing the insertion rod 31 into the soil to enhance the pull-out effect of the pull-out pile. The force transmission mechanism 4 is responsible for transmitting the force generated by the expansion mechanism 2 to the pushing mechanism 3, thereby driving the pushing mechanism 3 to work. The pile tip 5 is the structure at the bottom of the pile body, which is responsible for guiding the pile body to smoothly enter the soil layer and reducing the resistance during the pushing process. The automatic adjustment principle of the whole adaptive pull-out pile is that when the water content increases, water enters the expansion mechanism 2, causing the internal water-absorbing sponge 24 to absorb water and expand to generate expansion force. Specifically, the water-absorbing sponge 24 absorbs water and expands to generate displacement, and the specific displacement distance is obtained by the following formula of water content and displacement distance. This displacement distance causes the insertion rod 31 to be inserted into the soil through the force transmission mechanism 4. The higher the water content, the greater the displacement, and the deeper the insertion rod is inserted into the soil, thereby improving the pull-out resistance. When the insertion rod 31 reaches the limit distance of the soil and the water content continues to increase, it will also drive the barb 32 to unfold, further enhancing the pull-out resistance of the pull-out pile.

[0027] There are four push mechanisms 3 and force transmission mechanisms 4, which are evenly arranged on the pile body 1 in a two-layer symmetrical distribution. Each push mechanism 3 is equipped with an insertion rod 31, which is not only easy to insert into the soil, but also effectively increases the overall pull-out resistance.

[0028] like Figure 3~4 There are two expansion mechanisms 2, which are symmetrically distributed on both sides of the pile body 1. The expansion mechanism 2 includes an expansion space 21, a filter 22, a water storage compartment 23, a water-absorbing sponge 24, a thrust plate 25 and a water outlet 26. The expansion space 21 is arranged between the pile body 1 and the pile tip 5, the water-absorbing sponge 24 is filled in the expansion space 21, the water storage compartment 23 and the thrust plate 25 are respectively arranged at both ends of the water-absorbing sponge 24, the filter 22 is arranged at one end of the expansion space 21 close to the pile body 1, the water outlet 26 is opened on one side of the water storage compartment 23, and a triangular barb 7 is arranged at the bottom of the thrust plate 25.

[0029] like Figure 5The pushing mechanism 3 includes an insertion rod 31, an adaptive barb 32, a movable plate 33, a connecting rod 34, a fixed plate 35, a movable space 36 and a buckle 37. The insertion rod 31 is arranged on the inner side of the groove 6, and the movable space 36 is opened on the insertion rod 31. The movable plate 33 and the fixed plate 35 are both installed in the inner cavity of the movable space 36. One end of the adaptive barb 32 is connected to the insertion rod 31 through a roller, one end of the connecting rod 34 is connected to the movable plate 33 through a roller, and the other end of the connecting rod 34 is connected to the adaptive barb 32. The buckle 37 is arranged on the inner wall of the groove 6, and the protruding part of the movable plate 33 can collide with the buckle 37. The top end of the insertion rod 31 is conical, and the number of the groove 6 matches that of the pushing mechanism 3. The shape of the groove 6 is cylindrical and penetrates into the inner cavity of the pile body 1. The number of the buckles 37 is two, and both are located at one end of the inner wall of the groove 6 close to the soil. When the expansion mechanism 2 generates thrust acting on the pushing mechanism 3, the pushing mechanism 3 will first slowly push the insertion rod 31 into the soil. As the water content increases, the pushing mechanism 3 will further push the movable plate 33 to collide with the buckle 37 in the groove 6, thereby driving the adaptive barb 32 to unfold. In this process, the adaptive barb 32 can automatically adapt to the conditions in the soil, increase the friction between the pull-out pile and the soil, and thus enhance the stability of the pull-out pile. When the device is fully unfolded, the thrust plate 25 will be stuck next to the triangular barb 7 on the edge, and the adaptive barb 32 will also reach the optimal unfolding state. At this time, the entire device has been fully stretched and the pull-out resistance has reached the highest value.

[0030] like Figure 6The force transmission mechanism 4 includes a force transmission rod 41, a trapezoidal body 42, a gear 43, a toothed chain 44, a fixed cylinder 45 and a sleeve 46. One end of the force transmission rod 41 is hinged to the thrust plate 25, and the other end of the force transmission rod 41 is hinged to the sleeve 46. The gear 43 is arranged at the bottom end of the insertion rod 31, the fixed cylinder 45 is arranged in the inner cavity of the pile body 1, the sleeve 46 is arranged on the outside of the fixed cylinder 45, the trapezoidal body 42 is arranged on the outside of the sleeve 46, the toothed chain 44 is arranged on the surface of the trapezoidal body 42, and the gear 43 is meshed and connected with the toothed chain 44. The force transmission rod 41 connects the thrust plate 25 and the sleeve 46 to transmit the expansion force. The trapezoidal body 42 and the sleeve 46 together provide support and guidance for the toothed chain 44. The toothed chain 44 connects the gear 43 and the sleeve 46 to transmit the thrust to the thrust plate 25. The force transmission mechanism 4 is closely matched with the expansion mechanism 2 through the hinge, and the power transmission is realized through the gear 43 and the pushing mechanism 3. The trapezoidal body 42 and the sleeve 46 are designed as an integrated whole, making the force transmission process more stable and reliable. The width of the gear 43 is slightly smaller than the width of the pushing mechanism 3, and perfectly fits the width of the toothed chain 44, ensuring the smoothness of the transmission. At the same time, the groove design of the toothed chain 44 is slightly smaller than the radius of the gear 43, avoiding the possibility of the trapezoidal body 42 being stuck. The periphery of the trapezoidal body 42 adopts an arc design, and the hypotenuse and the bottom edge of the cross-sectional view are 45°. This angle design is both beautiful and practical, ensuring the vertical angle between the pushing mechanism 3 and the trapezoidal body 42, and further enhancing the stability of the structure. The relationship between the height of the trapezoidal body 42 and the depth of the insertion of the rod 31 into the soil is as follows:

[0031]

[0032] in, The depth of insertion into the soil, is the height to which the trapezoidal body 42 is raised, is the distance from the bottom of the force transmission rod 41 to the center position;

[0033] Assume that the bottom area of ​​the absorbent sponge 24 is , the expanded length of the water-absorbing sponge 24 chamber is , initial mass of absorbent sponge 24 , the moisture content is , the relationship between the moving distance of the expansion space 21 and the moisture content is as follows:

[0034]

[0035] The relationship between lifting height and moving distance is as follows:

[0036]

[0037] Combining the above formulas, we can derive the relationship between moisture content and insertion structure.

[0038] like Figure 7 The bottom of the expansion space 21 is provided with a mounting groove 8, and a spring 9 is installed on the inner side of the mounting groove 8. The top of the spring 9 is connected to the triangular barb 7. The filter screen 22 prevents soil impurities from entering the expansion space 21, ensuring that the water-absorbing sponge 24 can effectively absorb water and expand. The water storage compartment 23 stores the moisture that enters the device when the moisture content is stable. The soil itself has a certain moisture content. After the pile is formed, this moisture will gradually penetrate into the space of the expansion mechanism 2. Only when the moisture content rises and the water storage compartment 23 is full of water, will the water enter the water-absorbing sponge 24 through the upper water outlet 26. The water-absorbing sponge 24 is the core component of the expansion mechanism 2. Once it absorbs enough water, it will expand rapidly and generate a strong thrust. This thrust will drive the movement of the entire structure, thereby enhancing the close combination of the pile body and the soil body and improving the pile's pull-out resistance. In order to prevent the water-absorbing sponge 24 from shrinking when the moisture content decreases and further enhance the overall stability, a compressible sponge 24 is designed on the other side of the expansion mechanism 2. The triangular barbs 7 play a key role in the structure. When the water content is stable and the water storage compartment 23 can still carry the moisture of the soil, the entire structure is in an initial state, and the thrust plate 25 has not yet touched the triangular barb 7. At this time, the barb is popped out due to the action of the lower spring 9 and is placed outside the mounting groove 8. When water enters, thrust begins to be generated, and the thrust plate 25 gradually moves toward the barb, pressing the triangular barb 7 into the mounting groove 8. At this time, the spring 9 will contract. As the water content continues to rise, the amount of water entering the expansion mechanism 2 continues to increase, the water-absorbing sponge 24 continues to expand, and thrust continues to be generated. The thrust plate 25 continues to move. Every time a triangular barb 7 is pressed, the barb will pop up and jam the thrust plate 25 due to the action of the mounting groove 8. In this way, the thrust plate 25 cannot move in the opposite direction, thereby greatly increasing the overall stability.

Claims

1. An adaptive pull-out pile, characterized in that: The pile comprises a pile body (1), an expansion mechanism (2), a push mechanism (3), a force transmission mechanism (4) and a pile tip (5), wherein the expansion mechanism (2) is arranged between the pile tip (5) and the pile body (1), the push mechanism (3) is installed in a groove (6) on the pile body (1), and the push mechanism (3) is connected to the expansion mechanism (2) via the force transmission mechanism (4); the expansion mechanism (2) comprises an expansion space (21), a filter screen (22), a water storage compartment (23), a water absorbing sponge (24), a thrust plate (25) and a water outlet (26), the expansion space (21) being arranged between the pile body (1) and the pile tip (5), the water absorbing sponge (24) being filled in the expansion space (21), the water storage compartment (23) and the thrust plate (25) being arranged at two ends of the water absorbing sponge (24) respectively, the filter screen (22) being arranged at one end of the expansion space (21) close to the pile body (1), and the water outlet (26) being opened at one side of the water storage compartment (23); The bottom of the thrust plate (25) is provided with a triangular barb (7), the bottom of the expansion space (21) is provided with a mounting groove (8), a spring (9) is mounted inside the mounting groove (8), and the top of the spring (9) is connected to the triangular barb (7); The pushing mechanism (3) comprises an insertion rod (31), an adaptive barb (32), a movable plate (33), a connecting rod (34), a fixed plate (35), a movable space (36) and a buckle (37); the insertion rod (31) is arranged on the inner side of the groove (6); the movable space (36) is opened on the insertion rod (31); the movable plate (33) and the fixed plate (35) are both installed in the inner cavity of the movable space (36); one end of the adaptive barb (32) is connected to the insertion rod (31) via a roller; One end of the connecting rod (34) is connected to the movable plate (33) via a roller, the other end of the connecting rod (34) is connected to the adaptive barb (32), the buckle (37) is arranged on the inner wall of the groove (6), and the protruding part of the movable plate (33) can collide with the buckle (37); The top end of the insertion rod (31) is conical, the number of the grooves (6) matches the number of the pushing mechanism (3), the shape of the groove (6) is cylindrical and penetrates the inner cavity of the pile body (1), and the buckle (37) is located at one end of the inner wall of the groove (6) close to the soil; The force transmission mechanism (4) comprises a force transmission rod (41), a trapezoidal body (42), a gear (43), a toothed chain (44), a fixed cylinder (45) and a sleeve (46); one end of the force transmission rod (41) is hinged to the thrust plate (25), the other end of the force transmission rod (41) is hinged to the sleeve (46), and the gear (43) is arranged at the bottom end of the insertion rod (31); The fixed cylinder (45) is arranged in the inner cavity of the pile body (1), the sleeve (46) is arranged on the outside of the fixed cylinder (45), the trapezoidal body (42) is arranged on the outside of the sleeve (46), the toothed chain (44) is arranged on the surface of the trapezoidal body (42), and the gear (43) is meshingly connected with the toothed chain (44).

2. The adaptive pull-out pile according to claim 1, characterized in that: The number of the expansion mechanisms (2) is two, and they are symmetrically distributed on both sides of the pile body (1).

3. The adaptive pull-out pile according to claim 1, characterized in that: The pushing mechanism (3) and the force transmission mechanism (4) are evenly arranged on the pile body (1) in the form of two symmetrically distributed layers.

4. The adaptive pull-out pile according to claim 1, characterized in that: The relationship between the height at which the trapezoidal body (42) is lifted and the depth at which the insertion rod (31) is inserted into the soil is as follows: in, The depth of insertion into the soil, is the height to which the trapezoidal body (42) is raised.

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