Highway engineering bridge cast-in-situ bored pile device

Abstract

The invention relates to the field of building construction devices, and discloses a highway engineering bridge cast-in-situ bored pile device which comprises a containing cylinder, a telescopic mechanism, a motor and a rack. A driving motor winds a steel rope at a certain speed, so that a blocking mechanism ascends at a certain speed according to the conveying speed of a guide connector for conveying concrete; the inner wall of the hole is blocked by the outer side of the deformation structure in the ascending process, the situation that soil falls into the middle of concrete from the inner wall of the hole to affect the compactness of the concrete is avoided by blocking and guiding the soil, and the concrete is blocked by three inclined plates when falling downwards, so that the compactness of the concrete is improved. The impact force of concrete is reduced under multiple resistance of the three inclined plates, then the concrete falls into the hole through the elastic ring in the conical pipe, the situation that the falling impact force of the concrete is too large under the gravity effect is avoided, the situation that the width of the concrete is different due to the fact that the force of the concrete acting on the hole is inconsistent is avoided, and the stability of a pile body after the concrete is solidified is ensured.

Description

Technical Field

[0001] The invention relates to the field of building construction devices, in particular to a bored pile device for a highway engineering bridge. Background Art

[0002] Bored piles are a type of foundation used for buildings, bridges, roads and other projects. During construction, it is necessary to drill holes in the ground until the hole depth reaches the project requirements. Then, steel bars need to be placed to form the skeleton of the pile body, and then concrete is poured. After the concrete hardens, the bored piles can form a certain bearing capacity and stability for the column above. When pouring concrete, a delivery pump is usually used to transport concrete to the drilling location, and concrete is transported to the hole above the drill hole for pouring.

[0003] However, during pouring, due to the high conveying position, conveying concrete directly from above the hole will cause the concrete to fall. Although the existing technology uses a conduit to introduce concrete to the bottom of the hole, the subsequent concrete falls rapidly under gravity and impacts the concrete in the hole, and the impact force of the concrete will change. When the impact force changes, it is easy for the concrete to act unevenly on the hole, making the concrete width at the location with large impact force larger and the concrete width at the location with small impact force smaller, resulting in a large difference in the width of the concrete pile body, affecting the stability of the concrete pile body, and when the inner wall of the hole is poured, the hole is affected by the gravity of the concrete and vibrates, which is easy to fall off soil residues, so that the soil residues are easily mixed into the middle of the concrete, causing the problem of mud stuck in the pile body, affecting the density of the pile body. Summary of the Invention

[0004] The present invention provides a bored pile device for a highway engineering bridge, which overcomes the shortcomings described in the background art.

[0005] The technical solution adopted by the present invention to solve its technical problem is: A bored pile device for a highway engineering bridge comprises a containing barrel, a telescopic mechanism, a motor, and a frame. The frame is disposed at the lower end of the containing barrel and supports the containing barrel at its upper end. The upper end of the telescopic mechanism is disposed at the lower middle end of the containing barrel. The motor is fixed to the inner side of the frame. The telescopic mechanism is extended and retracted by the motor, and the lower end of the telescopic mechanism enters a hole. The telescopic mechanism is provided with a telescopic tube, a guide joint, a steel cable, a blocking mechanism and a circulation tube. The circulation tube is arranged at the middle lower end of the containing tube, the upper end of the telescopic tube is fixed to the lower end of the circulation tube, the guide joint is arranged at the middle lower end of the blocking mechanism, and the lower end of the telescopic tube is connected to the upper surface of the blocking mechanism. Two motors are provided, and the output ends of the two motors are provided with steel cables, and the steel cables are symmetrically distributed on the left and right sides of the telescopic tube. The driving motor reels the steel cables, and the steel cables pull the blocking mechanism up, thereby blocking the inner wall of the hole through the blocking mechanism.

[0006] A better technical solution: the blocking mechanism is provided with an arc-shaped plate, a circular ring, a deformation structure, a support mechanism, a screw assembly and a first spring. The support mechanism is arranged on the outside of the circular ring. The surface of the circular ring is connected to the steel cable and the lower end of the telescopic tube. A guide joint is fixed on the lower surface of the circular ring. The screw assembly is inserted into the interior of the arc-shaped plate, and the screw assembly spirally moves in the support mechanism. The deformation structure and the arc-shaped plate are respectively provided with two, which are in a circularly symmetrical distribution state. The first spring is provided with three, which are arc-shaped and distributed on the outside of the support mechanism. The first spring is elastically compressed between the support mechanism and the arc-shaped plate. When the screw assembly rotates, the screw assembly expands outward in an arc shape under the elastic force of the first spring, and causes the deformation structure to slide and expand in an arc shape on the outside of the arc plate.

[0007] A better technical solution: a circular ring is provided between the supporting mechanism and the circular ring, and a gap is provided at the connection between the supporting mechanism and the circular ring, and the circular ring and the supporting mechanism move in a straight line along the gap.

[0008] A better technical solution: The deformation structure is provided with a bending plate, a magnet and a slider, the magnet is arranged on the inner side of the bending plate, the curved plate is made of martensitic stainless steel and is magnetic, so that the magnet adsorbs the outer side of the slider, the slider is arranged on the left and right sides of the curved plate, the slider is fixed on the inner side of the curved plate, and the curved plate slides on the outer side of the curved plate through the slider and the magnet.

[0009] A better technical solution: The support mechanism is provided with a double-headed screw, a connecting rod, a support ring and a bearing ring. The double-headed screw is rotatably fixed on the inner side of the support ring, and the double-headed screw is connected to the outer side of the arc plate. The connecting rod is "L"-shaped, and the top end is arranged on the side of the double-headed screw. The outer end of the connecting rod is connected to the outside of the bearing ring, and the bearing ring is correspondingly arranged on the outside of the guide joint. The double-headed screw and the connecting rod are located in the circular notch.

[0010] A better technical solution: The guide joint is provided with an oblique plate, a vertebral canal and an elastic ring. There are three oblique plates, which are arranged on the inner wall of the vertebral canal at an angle of 20°. The elastic ring is wide at the top and narrow at the bottom and is arranged at the lower end of the vertebral canal. Concrete is obliquely introduced into the oblique plate in the vertebral canal and elastically decelerated by the oblique plate. The vertebral canal is in a conical shape that is wide at the top and narrow at the bottom, and the concrete above is gathered to the elastic ring for elastic deceleration.

[0011] A preferred technical solution: The oblique plate is provided with a second spring, a rubber strip and a force-bearing rod. A second spring is provided inside the rubber strip. The force-bearing rods are symmetrically distributed on the left and right sides of the rubber strip. The two ends of the second spring correspond to the force-bearing rods connected to the two sides of the rubber strip. The force-bearing rod on the left is fixed in an inclined shape on the inner wall of the vertebral canal, and the force-bearing rod on the right is elastically movable by the second spring. There is an open gap between the force-bearing rods on the same side.

[0012] Compared with the existing technology, this technical solution has the following advantages: In the present invention, the driving motor reels the steel cable at a certain rate, so that the blocking mechanism rises at a certain speed according to the conveying speed of the concrete conveyed by the guide joint, and then the blocking mechanism always maintains a certain height with the surface below, and when the blocking mechanism rises, the outer side of the deformation structure blocks the inner wall of the hole during the rising process, and under the rising force of the deformation structure, the soil is guided upward and scraped flat and re-bonded to the inner wall of the hole. Some soil that is easy to fall will be guided by the deformation structure and then fall vertically. Since the deformation structure is at the outermost edge of the hole, the outer side of the deformation structure guides the soil to fall to the outermost edge of the hole. By blocking and guiding the soil, the soil will not be mixed into the middle of the concrete, and it is avoided that the soil from the inner wall of the hole falls into the middle of the concrete and affects the density of the concrete.

[0013] In the present invention, when concrete falls downward, it passes through the surfaces of the three inclined plates, and the gravity of the concrete squeezes the stress-bearing rod and causes the stress-bearing rod to bend against the second spring. Under the bending force of the second spring and the squeezing of the rubber strip, a buffer is formed on the impact force of the concrete, so that the impact force of the concrete is reduced under the multiple resistance of the three inclined plates, and then the concrete falls into the hole through the elastic ring in the vertebral canal, avoiding excessive impact force of the concrete falling under the influence of gravity, and maintaining a certain impact force of the concrete under the stable guidance of the guide joint, avoiding inconsistent force of the concrete acting on the hole and causing different widths, thereby ensuring the stability of the pile body after the concrete solidifies. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and examples.

[0015] Figure 1 This is an overall diagram of the present invention.

[0016] Figure 2 It is a side view of the telescopic mechanism.

[0017] Figure 3 It is a plan diagram of the blocking mechanism.

[0018] Figure 4 It is a local three-dimensional schematic diagram of the deformed structure.

[0019] Figure 5 It is a cross-sectional perspective diagram of the support mechanism.

[0020] Figure 6 A side view of the guide joint.

[0021] Figure 7 It is a schematic cross-sectional perspective diagram of the oblique plate.

[0022] In the figure: holding cylinder 1, telescopic mechanism 2, motor 3, frame 4, telescopic tube 21, guide joint 22, steel cable 23, blocking mechanism 24, circulation tube 25, arc plate 241, circular ring 242, deformation structure 243, supporting mechanism 244, screw assembly 245, first spring 246, bending plate 31, magnet 32, slider 33, double-headed screw 41, connecting rod 42, supporting ring 43, load-bearing ring 44, oblique plate 11, vertebral canal 12, elastic ring 13, second spring 111, rubber strip 112, load-bearing rod 113. DETAILED DESCRIPTION

[0023] like Figures 1 to 7 As shown, the present invention proposes a bored pile device for a highway engineering bridge, comprising a holding cylinder 1, a telescopic mechanism 2, a motor 3, and a frame 4. The frame 4 is disposed at the lower end of the holding cylinder 1, and supports the holding cylinder 1 at its upper end. The upper end of the telescopic mechanism 2 is disposed at the middle lower end of the holding cylinder 1, and the motor 3 is fixed inside the frame 4. The telescopic mechanism 2 is extended and retracted by the motor 3, and the lower end of the telescopic mechanism 2 enters the hole. The telescopic mechanism 2 is provided with a telescopic tube 21, a guide joint 22, a steel cable 23, a blocking mechanism 24 and a circulation tube 25. The circulation tube 25 is arranged at the middle lower end of the containing tube 1, the upper end of the telescopic tube 21 is fixed to the lower end of the circulation tube 25, the guide joint 22 is arranged at the middle lower end of the blocking mechanism 24, and the lower end of the telescopic tube 21 is connected to the upper surface of the blocking mechanism 24. There are two motors 3, and the output ends of the two motors 3 are provided with steel cables 23, and the steel cables 23 are symmetrically distributed on the left and right sides of the telescopic tube 21. The driving motor 3 reels the steel cables 23, and the steel cables 23 pull the blocking mechanism 24 to rise, thereby blocking the inner wall of the hole through the blocking mechanism 24.

[0024] In addition, the two motors 3 run synchronously and raise and lower the blocking mechanism 24 by winding it up. When the blocking mechanism 24 enters the hole, it maintains a vertical state and moves downward along the inner wall of the hole. At this time, it is necessary to adjust the circular expansion amplitude of the blocking mechanism 24 in advance so that the blocking mechanism 24 can move in the hole when it is freely falling, and the motor 3 controls the winding of the steel cable 23 to realize the descent of the blocking mechanism 24 in the hole without blocking the blocking mechanism 24 on the inner wall of the hole. The soil that touches the inner wall of the hole during the descent will fall to the bottom of the hole under the obstruction of the outer side of the blocking mechanism 24 and will not be mixed into the concrete.

[0025] In addition, two connecting cables are provided at the connection between the lower end of the steel cable 23 and the surface of the blocking mechanism 24 , which are used to generate a triangular support point on the surface of the blocking mechanism 24 so that the two steel cables 23 can maintain the balance of the blocking mechanism 24 when pulling the blocking mechanism 24 .

[0026] In addition, concrete is introduced into the holding cylinder 1 and transported to the telescopic mechanism 2 by controlling the opening and closing of the outlet end of the holding cylinder 1. A plate structure is provided on the side of the holding cylinder 1 to block the outlet end of the holding cylinder 1 and to regulate the outflow speed of the concrete in the holding cylinder 1.

[0027] Among them, after the blocking mechanism 24 reaches the bottom of the hole, the electric drive motor 3 is used to make the two motors 3 synchronously reel in the steel cable 23 and rise. At this time, the blocking mechanism 24 blocks the soil falling from the inner wall of the hole, so that the soil is re-adhered to the inner wall of the hole when the blocking mechanism 24 moves upward.

[0028] In addition, the conveying speed of the containing drum 1 is regulated by the plate-like structure on the side. According to the circulation speed of the concrete in the containing drum 1, the winding of the steel cable 23 by the motor 3 is adjusted to control the rising speed of the blocking mechanism 24. This ensures that the concrete falling into the hole from the guide joint 22 when the containing drum 1 is introduced into the telescopic tube 21 maintains a certain filling speed. The filling speed and the raising and lowering speed of the blocking mechanism 24 by the motor 3 are kept constant, so that the blocking mechanism 24 is kept at a standard height from the surface below, and the impact load of concrete at the standard height is maintained at 2 kN / m³.

[0029] Among them, the blocking mechanism 24 is provided with a curved plate 241, a circular ring 242, a deformation structure 243, a supporting mechanism 244, a screw assembly 245 and a first spring 246. The supporting mechanism 244 is arranged on the outside of the circular ring 242. The surface of the circular ring 242 is connected to the steel cable 23 and the lower end of the telescopic tube 21. The guide joint 22 is fixed to the lower surface of the circular ring 242. The screw assembly 245 is inserted into the interior of the curved plate 241, and the screw assembly 245 spirally moves in the supporting mechanism 244. The deformation structure 243 and the curved plate 241 are respectively provided with two, which are circularly symmetrically distributed. The first spring 246 is provided with three, which are arc-shaped and distributed on the outside of the supporting mechanism 244. The first spring 246 is elastically compressed between the supporting mechanism 244 and the curved plate 241. When the screw assembly 245 rotates, the screw assembly 245 expands outward in an arc shape under the elastic force of the first spring 246, and causes the deformation structure 243 to slide and expand in an arc shape on the outside of the curved plate 241.

[0030] Among them, 101 is provided between the support mechanism 244 and the ring 242. 101 is circular, and there is a gap at the connection between 101 and the support mechanism 244 and the ring 242. The ring 242 and the support mechanism 244 move in a straight line along the gap of 101.

[0031] Among them, the deformation structure 243 is provided with a bending plate 31, a magnet 32 ​​and a slider 33. The magnet 32 ​​is arranged on the inner side of the bending plate 31. The curved plate 241 is made of martensitic stainless steel and has magnetism, so that the magnet 32 ​​is adsorbed on the outside of the slider 33. The slider 33 is arranged on the left and right sides of the curved plate 31. The slider 33 is fixed on the inner side of the curved plate 241. The curved plate 31 slides on the outside of the curved plate 241 through the slider 33 and the magnet 32.

[0032] In addition, the magnet 32 ​​attracts the outside of the curved plate 241 and is limited by the sliding of the slider 33, so that the curved plate 31 can only slide on the outside of the double-headed screw 41, and the part that does not slide with the curved plate 241 expands outward, so that the curved plate 31 moves in association with the expansion of the curved plate 241.

[0033] In the present invention, before the blocking mechanism 24 enters the hole, 101 is placed in the hole in advance, and the gap between the supporting mechanism 244 and the ring 242 is aligned with 101, so as to facilitate the lifting and lowering movement of the ring 242 and the supporting mechanism 244. Moreover, before the blocking mechanism 24 enters the hole, the screw assembly 245 is rotated according to the size of the hole, so that the arc plate 241 expands outward under the elasticity of the first spring 246. At this time, the outward expansion of the two arc plates 241 will drive the two deformation structures 243 to slide and expand, thereby realizing circular regulation of the deformation structure 243.

[0034] Among them, the support mechanism 244 is provided with a double-headed screw 41, a connecting rod 42, a support ring 43 and a load-bearing ring 44. The double-headed screw 41 is rotatably fixed on the inner side of the support ring 43, and the double-headed screw 41 is connected to the outer side of the arc plate 241. The connecting rod 42 is "L"-shaped, and the top end is set on the side of the double-headed screw 41. The outer end of the connecting rod 42 is connected to the outside of the load-bearing ring 44, and the load-bearing ring 44 is correspondingly set on the outside of the guide joint 22. The double-headed screw 41 and the connecting rod 42 are located at the circular notch of 101.

[0035] In addition, the two ends of the double-headed screw 41 have opposite thread shapes. Through the rotation of the double-headed screw 41, the relatively fixed support ring 43 and the circular ring 242 can be connected and fixed, and the positions of the double-headed screw 41 and the connecting rod 42 correspond to the notch of 101. Through the connection of the double-headed screw 41, the support ring 43 and the circular ring 242 can be raised and lowered along the inner and outer sides of 101. At the same time, 101 can be limited to a certain activity area to prevent 101 from displacement under the influence of concrete.

[0036] In the present invention, the load-bearing ring 44 is connected and fixed to the inner side of the support ring 43 through the connecting rod 42. When the support ring 43 moves, the load-bearing ring 44 limits it to the outer side of the guide joint 22, so that the support mechanism 244 and the guide joint 22 can remain movable as a whole, avoiding the connection between the support mechanism 244 and the circular ring 242 being easily broken due to only the double-headed screw 41.

[0037] In the present invention, the holding cylinder 1 conveys concrete into the telescopic mechanism 2 at a certain speed. The concrete is conveyed from the guide joint 22 to the bottom of the hole under the extension of the steel cable 23. At a certain conveying speed, the driving motor 3 reels the steel cable 23 at a certain rate, so that the blocking mechanism 24 rises at a certain speed according to the conveying speed of the concrete conveyed by the guide joint 22. Then, the blocking mechanism 24 always maintains a certain height with the surface below. When the blocking mechanism 24 rises, the outer side of the deformation structure 243 scrapes and blocks the inner wall of the hole. Since the blocking mechanism 24 is at a distance from the cast The height of the concrete is maintained at a stable height, so that the outer side of the deformable structure 243 blocks the inner wall of the hole during the rising process. Under the rising force of the deformable structure 243, the soil is guided upward, scraped flat, and re-bonded to the inner wall of the hole. Some soil that is easy to fall will be guided by the deformable structure 243 and fall vertically. Since the deformable structure 243 is at the very edge of the hole, the outer side of the deformable structure 243 guides the soil to fall to the very edge of the hole. By blocking and guiding the soil, the soil will not be mixed into the middle of the concrete, avoiding the soil from falling from the inner wall of the hole to the middle of the concrete and affecting the density of the concrete.

[0038] It is necessary to point out that when the soil falls to the edge of the hole, the concrete itself will penetrate into the inner wall of the hole when the concrete fills the hole. Therefore, the soil guided to the edge will not affect the filling of the concrete. Moreover, since the deformable structure 243 can rise and fall in the hole, the gap is small, and the rise of the deformable structure 243 also has the effect of crushing large pieces of soil.

[0039] Among them, the guide joint 22 is provided with an oblique plate 11, a vertebral canal 12 and an elastic ring 13. The oblique plates 11 are provided with three, which are arranged on the inner wall of the vertebral canal 12 at an angle of 20°. The elastic ring 13 is wide at the top and narrow at the bottom and is arranged at the lower end of the vertebral canal 12. The concrete is obliquely introduced into the oblique plate 11 in the vertebral canal 12 and elastically decelerated by the oblique plate 11. The vertebral canal 12 is in a conical shape that is wide at the top and narrow at the bottom, and the concrete above is gathered to the elastic ring 13 for elastic deceleration.

[0040] In addition, the elastic ring 13 is made of rubber. When concrete gathers at the lower end of the vertebral canal 12 and contacts the elastic ring 13, the elastic ring 13 blocks the concrete to a certain extent, so that a certain amount of concrete can pass through the middle of the elastic ring 13. Too much concrete will affect the force of falling. Too little concrete can pass directly through the middle of the elastic ring 13. Too much concrete will be partially blocked by the elastic barrier of the elastic ring 13, forming a regulation effect on the amount of concrete, avoiding excessive concrete from rushing out directly along the inner wall of the vertebral canal 12 under inertia.

[0041] Moreover, since the top of the inclined plate 11 has an elastic buffering effect, the connection position of the three inclined plates 11 and the inner wall of the vertebral canal 12 is triangular in a top view. By changing the fixed position, the three inclined plates 11 intersect with each other without overlapping, thereby preventing concrete from leaking from the top inclined plate 11 and then leaking from the lower inclined plates 11.

[0042] Among them, the oblique plate 11 is provided with a second spring 111, a rubber strip 112 and a force rod 113. The second spring 111 is provided inside the rubber strip 112, and the force rod 113 is symmetrically distributed on the left and right sides of the rubber strip 112. The two ends of the second spring 111 correspond to the force rods 113 on both sides of the rubber strip 112. The force rod 113 on the left side is fixed in an inclined shape on the inner wall of the vertebral canal 12, and the force rod 113 on the right side is elastically movable by the second spring 111, and there is an open gap between the force rods 113 on the same side.

[0043] In the present invention, since the three oblique plates 11 do not overlap, when concrete falls downward, it passes through the surfaces of the three oblique plates 11, and the concrete gravity squeezes the force-bearing rod 113, causing the force-bearing rod 113 to bend against the second spring 111. Under the bending force of the second spring 111 and the squeezing of the rubber strip 112, a buffer is formed to the impact force of the concrete, so that the concrete reduces the impact force under the multiple resistance of the three oblique plates 11, and then the concrete falls into the hole through the elastic ring 13 in the vertebral canal 12. Since the guide joint 22 starts to convey concrete at the bottom of the hole, and the motor 3 drives the blocking mechanism 24 to rise and fall with the conveying speed, the concrete falls from the guide joint 22 to the height below and remains at the elevation position, avoiding excessive impact force of the concrete under the influence of gravity, and maintaining a certain impact force under the stable derivation of the guide joint 22, avoiding inconsistent force of the concrete acting in the hole and causing different widths, thereby ensuring the stability of the pile body after the concrete solidifies.

[0044] The above description is merely a preferred embodiment of the present invention and therefore cannot be used to limit the scope of the present invention. In other words, equivalent changes and modifications made according to the scope of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A bored pile device for a highway engineering bridge, characterized in that: The device comprises a holding cylinder, a telescopic mechanism, a motor and a frame. The frame is arranged at the lower end of the holding cylinder and supports the holding cylinder at its upper end. The upper end of the telescopic mechanism is arranged at the middle lower end of the holding cylinder. The motor is fixed on the inner side of the frame. The telescopic mechanism is extended and retracted by the motor, and the lower end of the telescopic mechanism enters the hole. The telescopic mechanism is provided with a telescopic tube, a guide joint, a steel cable, a blocking mechanism and a circulation tube. The circulation tube is arranged at the middle lower end of the containing tube, the upper end of the telescopic tube is fixed to the lower end of the circulation tube, the guide joint is arranged at the middle lower end of the blocking mechanism, and the lower end of the telescopic tube is connected to the upper surface of the blocking mechanism. Two motors are provided, and the output ends of the two motors are provided with steel cables, and the steel cables are symmetrically distributed on the left and right sides of the telescopic tube. The driving motor reels the steel cables, and the steel cables pull the blocking mechanism up, thereby blocking the inner wall of the hole through the blocking mechanism.

2. A bored pile device for highway engineering bridges according to claim 1, characterized in that: The blocking mechanism is provided with an arc-shaped plate, a circular ring, a deformation structure, a support mechanism, a screw assembly and a first spring. The support mechanism is arranged on the outside of the circular ring, the surface of the circular ring is connected to the steel cable and the lower end of the telescopic tube, and a guide joint is fixed to the lower surface of the circular ring. The screw assembly is inserted into the interior of the arc-shaped plate, and the screw assembly spirally moves in the support mechanism. The deformation structure and the arc-shaped plate are respectively provided with two, which are in a circular symmetrical distribution state. The first spring is provided with three, which are arc-shaped and distributed on the outside of the support mechanism. The first spring is elastically compressed between the support mechanism and the arc-shaped plate. When the screw assembly rotates, the screw assembly expands outward in an arc shape under the elastic force of the first spring, and causes the deformation structure to slide and expand in an arc shape on the outside of the arc plate; A circular ring is provided between the supporting mechanism and the circular ring, and a gap is provided at the connection between the supporting mechanism and the circular ring. The circular ring and the supporting mechanism move in a straight line along the gap.

3. A bored pile device for highway engineering bridge according to claim 2, characterized in that: The deformation structure is provided with a bending plate, a magnet and a slider. The magnet is arranged on the inner side of the bending plate. The curved plate is made of martensitic stainless steel and has magnetism, so that the magnet adsorbs the outer side of the slider. The slider is arranged on the left and right sides of the curved plate. The slider is fixed on the inner side of the curved plate. The curved plate slides on the outer side of the curved plate through the slider and the magnet.

4. A bored pile device for highway engineering bridges according to claim 3, characterized in that: The support mechanism is provided with a double-headed screw, a connecting rod, a support ring and a bearing ring. The double-headed screw is rotatably fixed on the inner side of the support ring, and the double-headed screw is connected to the outer side of the arc plate. The connecting rod is "L"-shaped, and the top end is arranged on the side of the double-headed screw. The outer end of the connecting rod is connected to the outside of the bearing ring, and the bearing ring is correspondingly arranged on the outside of the guide joint. The double-headed screw and the connecting rod are located in the circular notch.

5. A bored pile device for highway engineering bridges according to claim 4, characterized in that: The guide joint is provided with an oblique plate, a vertebral canal and an elastic ring. There are three oblique plates, which are arranged on the inner wall of the vertebral canal at an inclination of 20°. The elastic ring is wide at the top and narrow at the bottom and is arranged at the lower end of the vertebral canal. Concrete is obliquely introduced into the oblique plate in the vertebral canal and elastically decelerated by the oblique plate. The vertebral canal is in a conical shape that is wide at the top and narrow at the bottom, and the concrete above is gathered to the elastic ring for elastic deceleration.

6. A bored pile device for highway engineering bridges according to claim 5, characterized in that: The oblique plate is provided with a second spring, a rubber strip and a force-bearing rod. A second spring is provided inside the rubber strip. The force-bearing rods are symmetrically distributed on the left and right sides of the rubber strip. The two ends of the second spring correspond to the force-bearing rods connected to the two sides of the rubber strip. The force-bearing rod on the left is fixed in an inclined shape on the inner wall of the vertebral canal, and the force-bearing rod on the right is elastically movable by the second spring. There is an open gap between the force-bearing rods on the same side.

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