Pile foundation construction device

Abstract

The present invention relates to the technical field of pile hole mechanical equipment, and specifically discloses a pile foundation construction device, comprising a drill tube, a locking mechanism, an upper base plate and a lower base plate, the upper base plate being hinged on the lower end of the drill tube, and the lower base plate being rotatably mounted on the lower end surface of the upper base plate, the upper base plate and the lower base plate being respectively provided with a through hole one and a through hole two for feeding into the drill tube, a plurality of telescopic plates one being arranged in the through hole one along the radial direction of the upper base plate, and the plurality of telescopic plates one gradually increase in length from the inside to the outside, the telescopic plates one being slidably mounted on the upper base plate along the circumferential direction of the upper base plate, an elastic member one being arranged between the telescopic plate one and the upper base plate, when the drill tube is full, the upper base plate is reversed, so that the telescopic plate one blocks the through hole two, and when there is a stone in the through hole one, the telescopic plate one will compress the elastic member one after abutting against the stone; the beneficial effects of the present invention are as follows: the influence of the stone on the drilling tube blocking can be reduced, thereby improving the efficiency of pile foundation construction.

Description

Technical Field

[0001] The invention relates to the technical field of pile hole mechanical equipment, and in particular to a pile foundation construction device. Background Art

[0002] Pile foundation construction is an important basic link in construction projects. First, accurate pile position measurement and layout should be carried out to determine the exact position of each pile. Then, according to different pile foundation types, such as cast-in-place piles or precast piles, corresponding construction should be carried out. For cast-in-place piles, first drill holes. During the drilling process, ensure that the verticality and depth meet the design requirements, and at the same time ensure the stability of the hole wall. Then lower the steel cage and pour concrete into the hole. If it is a precast pile, the precast pile body is driven into the ground to a predetermined depth by piling equipment. When driving the pile, the verticality and driving speed of the pile body must be strictly controlled to ensure that the pile body can stably bear the load of the superstructure. The entire pile foundation construction process needs to be strictly operated in accordance with the construction specifications to ensure the stability of the building foundation.

[0003] The Chinese patent document with the announcement number CN113982490B discloses a rotary drilling bit and a rotary drilling construction method suitable for mudstone formations, which includes a drill barrel, a locking mechanism, an upper base plate and a lower base plate. The upper base plate is connected to the lower part of the drill barrel and can cooperate with the locking mechanism to complete the action of closing and opening the drill barrel. The lower base plate is rotatably connected to the upper base plate, and a drill tooth is provided at the bottom of the lower base plate. The locking mechanism is used to control the drill bit to close and accommodate drill cuttings and open and dump drill cuttings. As the rotary drilling rig rotates and lowers the drill rod, the guide tooth first contacts the working surface and cuts into the working surface. After the working surface is positioned, the extended cutting teeth contact the working surface and start drilling; under the combined action of friction resistance and the limit block, the lower base plate rotates around the upper base plate until the slag inlet of the upper base plate is completely open, and the drill cuttings enter the drill barrel through the slag inlet; after completing the operation to a certain depth, the drill rod of the rotary drilling rig is reversed, and under the action of friction resistance and the limit block, the lower base plate rotates around the upper base plate until the slag inlet of the upper base plate is completely closed, the rotary drilling rig lifts the drill rod and moves it to the slag unloading point, controls the rotary drilling rig to press down the through shaft to open the locking mechanism, and the upper base plate opens to complete the slag unloading action.

[0004] In the above technology, during the process of the drill rod being reversed to drive the lower bottom plate to rotate around the upper bottom plate to close the slag inlet, if there are stones at the slag inlet, the lower bottom plate and the upper bottom plate will be blocked by the stones and the slag inlet cannot be completely closed, which will cause the soil in the drill barrel to fall from the slag inlet during the rising process of the drill barrel, thereby reducing the construction efficiency. Summary of the invention

[0005] The present invention provides a pile foundation construction device, aiming to solve the technical problem in the related art that the lower base plate and the upper base plate are blocked by stones and the slag inlet cannot be completely closed, which causes the soil in the drill tube to fall from the slag inlet and reduces the construction efficiency.

[0006] A pile foundation construction device comprises a drill tube, a locking mechanism, an upper base plate and a lower base plate, wherein the upper base plate is hinged at the lower end of the drill tube, the lower base plate is rotatably mounted on the lower end surface of the upper base plate, and a through hole 1 and a through hole 2 for feeding materials into the drill tube are respectively opened on the upper base plate and the lower base plate, and further comprises:

[0007] A plurality of arc-shaped telescopic plates 1 are arranged in the through hole 1 along the radial direction of the upper bottom plate, and the lengths of the plurality of telescopic plates 1 gradually increase from the inside to the outside. The telescopic plates 1 are slidably mounted on the upper bottom plate along the circumferential direction of the upper bottom plate. An elastic member 1 is arranged between the telescopic plates 1 and the upper bottom plate. When the drill tube is full, the upper bottom plate is reversed so that the telescopic plates 1 block the through hole 2. When there is a stone in the through hole 1, the telescopic plates 1 will compress the elastic member 1 after contacting the stone.

[0008] The locking assembly is arranged on the upper base plate. When the second through hole is blocked, the upper base plate and the lower base plate are locked.

[0009] The effect is that by setting a plurality of telescopic plates 1, when there are stones in through hole 1 and through hole 2, the telescopic plate 1 that is not in contact with the stone will continue to block through hole 2, thereby reducing the impact of the stone.

[0010] Preferably, a rotating frame and a driving assembly for driving the rotating frame to rotate are rotatably mounted on the upper base plate, a plurality of arc-shaped telescopic plates 2 are arranged on the rotating frame along the radial direction of the drill barrel, and the lengths of the plurality of telescopic plates 2 gradually increase from the inside to the outside, the telescopic plate 2 is slidably mounted on the rotating frame along the circumferential direction of the drill barrel, an elastic member 2 is arranged between the telescopic plate 2 and the upper base plate, when the through hole 2 is opened, the telescopic plate 1 and the telescopic plate 2 are respectively located at the front and rear sides of the through hole 2, and when the drill barrel is full, the telescopic plate 1 and the telescopic plate 2 on both sides of the through hole 2 are close to each other to block the through hole 2.

[0011] The effect is that by setting a plurality of telescopic plates 2, when blocking the through hole 2, the telescopic plates 1 and 2 are brought close to each other to block the through hole 2. At this time, if there are stones blocking the through hole 1 and the through hole 2, the telescopic plates 1 and 2 can clamp the stones from the front and back sides, so as to avoid the telescopic plate 1 being unable to push the stones to move, resulting in a gap between the other side of the stones and the lower bottom plate when the drill tube is lifted, thereby causing the soil in the drill tube to slip, thereby reducing the efficiency of the pile foundation construction.

[0012] Preferably, the driving assembly includes a gear rotatably mounted on the lower base plate, a gear ring 1 fixedly mounted on the upper base plate, and a gear ring 2 fixedly mounted on the rotating frame, and the upper and lower sides of the gear are respectively meshed with the gear ring 1 and the gear ring 2.

[0013] Preferably, the ends of the telescopic plate 1 and the telescopic plate 2 that are close to each other are both provided with protrusions for abutting against stones.

[0014] Preferably, a vibration motor is disposed inside the protrusion to make the protrusion vibrate.

[0015] The effect is to reduce the resistance of the soil when the telescopic plate 1 and the telescopic plate 2 are close to each other.

[0016] Preferably, arc-shaped track grooves are provided on the inner arc surfaces of the telescopic plate 1 and the telescopic plate 2, and arc-shaped slide bars for cooperating with adjacent track grooves are provided on the outer arc surfaces of the telescopic plate 1 and the telescopic plate 2.

[0017] The effect is that the track groove and the arc-shaped slide bar are provided, thereby improving the bearing capacity of the telescopic plate 1 and the telescopic plate 2 on the soil in the drill tube, thereby improving the service life of the equipment.

[0018] Preferably, the locking assembly includes a locking block slidably installed on the outer circumferential surface of the upper base plate along the radial direction of the upper base plate and a driving source 1 for driving the locking block to move. When the through hole 2 is blocked, the driving source 1 drives the locking block to move outward and abut against the lower base plate.

[0019] The effect is that by setting the locking assembly, when the through hole 2 is blocked, the upper bottom plate and the lower bottom plate are locked, so as to prevent that when there are stones in the through hole 1, due to the stored force of the elastic parts 1 and 2, when the drill tube is lifted, the elastic potential energy stored in the elastic parts 1 and 2 is released, causing the lower bottom plate to rotate relative to the upper bottom plate, thereby opening the through hole 2 and causing the soil in the drill tube to slide.

[0020] Preferably, the driving source 1 includes a lead screw 1 arranged in the upper base plate and a motor 1 whose output end is connected to the lead screw 1, and the lead screw 1 is threadedly engaged with the locking block.

[0021] Preferably, the locking mechanism includes a connecting hook arranged on the upper base plate, a block arranged on the drill barrel for sliding in the horizontal direction, and a driving source for driving the block to move. A groove for cooperating with the block is provided on the side of the connecting hook. When the upper base plate is coaxial with the drill barrel, the block is engaged in the groove.

[0022] Preferably, the second driving source comprises a second lead screw arranged on the drill tube and a second motor whose output end cooperates with the second lead screw, and the second lead screw is threadedly engaged with the block.

[0023] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0024] During the construction of pile foundation, when the rotary drilling rig digs a hole in the ground, after the drill tube is full, the drill tube reverses to close through hole two. If there are stones in through hole two and through hole one, through hole two and through hole one cannot be completely blocked. Therefore, during the lifting of the drill tube, the soil and stones in the drill tube will slide down, thereby reducing the construction efficiency. By setting the telescopic plates one and two, during the blocking of through hole one and through hole two, if there are stones in through hole one and through hole two, since multiple telescopic plates one and two are provided, the telescopic plates one and two that are in contact with the stones will clamp the stones, and the remaining telescopic plates one and two will continue to block the places without stones, thereby reducing the impact of the stones on the blocking of through hole one and through hole two, thereby improving the construction efficiency of the pile foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 It is a structural schematic diagram of the bottom plate mechanism of the present invention.

[0027] Figure 3 It is an exploded schematic diagram of the bottom plate mechanism of the present invention.

[0028] Figure 4 It is a structural schematic diagram of the drill tube of the present invention.

[0029] Figure 5 It is a structural schematic diagram of the upper base plate of the present invention.

[0030] Figure 6 It is a structural schematic diagram of the lower base plate of the present invention.

[0031] Reference numerals:

[0032] 1. Drill barrel; 2. Bottom plate mechanism; 21. Upper bottom plate; 211. Through hole 1; 212. Rotating shaft hole; 213. Mounting rod 1; 214. Limit block; 22. Lower bottom plate; 221. Through hole 2; 222. Rotating shaft; 223. Inclined surface; 224. Rotary excavation tooth; 23. Blocking assembly; 231. Telescopic plate 1; 232. Rotating frame; 233. Telescopic plate 2; 234. Protrusion; 235. Gear; 236. Gear ring 1; 237. Gear ring 2; 24. Locking block; 25. Screw 1; 3. Locking mechanism; 31. Connecting hook; 32. Block; 33. Screw 2. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0034] like Figure 1As shown, a pile foundation construction device according to an embodiment of the present invention comprises a rotary drilling rig (not shown in the figure) and a drill bit, wherein the drill bit is mounted on a drill rod of the rotary drilling rig and is used for drilling holes in the pile foundation.

[0035] like Figure 1 As shown, the drill bit includes a drill barrel 1, a base plate mechanism 2 and a locking mechanism 3. The drill barrel 1 is installed on the drill rod of the rotary drilling rig and is used to store soil and stones. The base plate mechanism 2 is arranged at the bottom end of the drill barrel 1. The locking mechanism 3 is used to fix the base plate mechanism 2 and the drill barrel 1. When the drill barrel 1 rotates forward, the base plate mechanism 2 guides the soil and stones into the drill barrel 1. When the drill barrel 1 rotates reversely, the base plate mechanism 2 blocks the bottom end of the drill barrel 1.

[0036] like Figure 2 , Figure 3 , Figure 5 , Figure 6 As shown, the bottom plate mechanism 2 includes an upper bottom plate 21, a lower bottom plate 22, two groups of blocking components 23 and a locking component. The upper bottom plate 21 is hinged on the lower end surface of the drill tube 1. An upwardly extending rotating shaft 222 is fixedly installed at the center of the circle of the lower bottom plate 22. A rotating shaft hole 212 penetrating up and down is provided at the center of the circle of the upper bottom plate 21. The rotating shaft 222 is rotatably installed in the rotating shaft hole 212. Two fan-shaped through holes 211 penetrating up and down are provided on the upper bottom plate 21. The two through holes 211 are arranged in a circular array around the axis direction of the upper bottom plate 21. Two fan-shaped through holes 221 penetrating up and down are provided on the lower bottom plate 22. The two through holes 221 are arranged in a circular array around the axis direction of the lower bottom plate 22. Inclined surfaces 223 are respectively arranged on the hole walls of the two through holes 221 along the radial direction of the lower bottom plate 22. , and the two inclined surfaces 223 are arranged in a circular array around the axial direction of the lower base plate 22, and a plurality of rotary digging teeth 224 are installed on the inclined surface 223, and the rotary digging teeth 224 are used to crush the soil and introduce it into the drill tube 1. A limit block 214 is fixedly installed on the lower end surface of the upper base plate 21. When the through hole 1 211 and the through hole 221 are connected, the limit block 214 is used to block and limit the lower base plate 22. During the hole digging process, the soil passes through the through hole 1 211 and the through hole 221 into the drill tube 1. The two groups of blocking components 23 are respectively arranged in the two through holes 1 211 for blocking the through hole 221, and the two groups of blocking components 23 are arranged in a circular array around the axial direction of the upper base plate 21. The locking component is arranged on the upper base plate 21 for locking the upper base plate 21 and the lower base plate 22.

[0037] In the initial state, the through hole 221 is blocked by the blocking assembly 23, and the through hole 1 211 is blocked by the lower base plate 22. When the rotary digging tooth 224 abuts against the ground and the drill tube 1 rotates forward, the rotary digging tooth 224 is subjected to the friction of the ground, causing the lower base plate 22 and the upper base plate 21 to rotate relative to each other, until the through hole 1 211 and the through hole 2 221 are connected, the lower base plate 22 abuts against the limit block 214, and then the upper base plate 21 rotates, driving the lower base plate 22 to rotate through the limit block 214.

[0038] like Figure 3 , Figure 5 As shown, the blocking assembly 23 includes a plurality of arc-shaped telescopic plates 231, a rotating frame 232, a plurality of arc-shaped telescopic plates 233 and a driving assembly. A plurality of fan-shaped mounting rods 213 are installed on the hole wall of the through hole 211. The plurality of mounting rods 213 are coaxial with the upper bottom plate 21, and the lengths of the plurality of mounting rods 213 gradually increase from the inside to the outside. The plurality of telescopic plates 231 are respectively sleeved on the plurality of mounting rods 213 along the radial direction of the upper bottom plate 21. The plurality of telescopic plates 231 gradually increase from the inside to the outside, and the plurality of telescopic plates 231 are respectively sleeved on the plurality of mounting rods 213. The first and second mounting rods 21 and 23 are coaxial with each other, and an elastic member 1 is installed between the telescopic plate 1 231 and the mounting rod 1 213. The elastic member 1 is a compression spring 1 (not shown in the figure). The two ends of the compression spring 1 are respectively connected to the telescopic plate 1 231 and the mounting rod 1 213. The rotating frame 232 is sleeved on the rotating shaft 222. Two groups of mounting rod groups are arranged on the rotating frame 232. The two groups of mounting rod groups are arranged in a circular array around the axis of the rotating frame 232. The mounting rod group is composed of a plurality of fan-shaped mounting rods 2. The plurality of mounting rods 2 are coaxial with the rotating frame 232, and the plurality of mounting rods in the same group are connected to the first and second mounting rods 213. The length of the mounting rod 2 increases gradually from the inside to the outside, and multiple telescopic plates 233 are respectively sleeved on the multiple mounting rods 2 along the radial direction of the upper base plate 21. The length of the multiple telescopic plates 233 increases gradually from the inside to the outside, and the multiple telescopic plates 233 are coaxial with the rotating frame 232. An elastic member 2 is installed between the telescopic plate 233 and the mounting rod 2. The elastic member 2 is a compression spring 2 (not shown in the figure). The two ends of the compression spring 2 are respectively connected to the telescopic plate 233 and the mounting rod 2. The ends of the telescopic plates 1 231 and 233 that are close to each other are movably installed. The protrusion 234 is used to abut against the stone, and a vibration motor (not shown in the figure) is arranged inside the protrusion 234 to make the protrusion 234 vibrate. When the telescopic plate 1 231 and the telescopic plate 233 are close to each other, the vibration motor is started, thereby reducing the resistance of the soil when the telescopic plate 1 231 and the telescopic plate 233 are close to each other. The inner curved surfaces of the telescopic plate 1 231 and the telescopic plate 233 are provided with arc-shaped track grooves, and the outer curved surfaces of the telescopic plate 1 231 and the telescopic plate 233 are provided with arc-shaped slide bars for cooperating with adjacent track grooves.

[0039] When the through hole 221 is opened, the telescopic plate 1 231 and the telescopic plate 233 are respectively located at the front and rear sides of the through hole 221. When the drill tube 1 is full, the drill tube 1 reverses and drives the upper base plate 21 to reverse. At this time, the lower base plate 22 is subjected to the friction of the ground and rotates relative to the upper base plate 21. At the same time, the driving component drives the rotating frame 232 to rotate in the opposite direction relative to the upper base plate 21, so that multiple telescopic plates 1 231 and multiple telescopic plates 2 233 start to approach each other from the front and rear sides of the through hole 221, thereby blocking the through hole 221. When there is a stone in the through hole 1 211, the telescopic plate 1 231 and the telescopic plate 2 233 will compress the compression spring 1 and the compression spring 2 respectively after abutting against the stone, thereby clamping the stone.

[0040] like Figure 3 , Figure 5 As shown, the driving assembly includes a gear 235, a ring gear 1 236 and a ring gear 237. A gear shaft extends outwardly along the radial direction of the rotating shaft 222 on the rotating shaft 222. The gear 235 is rotatably mounted on the gear shaft, the ring gear 1 236 is fixedly mounted on the upper end surface of the upper base plate 21, and the ring gear 237 is fixedly mounted on the lower end surface of the rotating frame 232. The upper and lower ends of the gear 235 are respectively meshed with the ring gear 237 and the ring gear 1 236. When the lower base plate 22 is subjected to the friction force of the ground and thus rotates relative to the upper base plate 21, as the upper base plate 21 rotates, the upper base plate 21 drives the gear 235 to rotate through the ring gear 1 236, and then drives the ring gear 237 to rotate in the opposite direction, so that the telescopic plate 1 231 and the telescopic plate 2 233 on the front and rear sides of the through hole 221 are close to each other.

[0041] like Figure 2 , Figure 3 , Figure 5 As shown, the locking assembly includes a locking block 24 and a driving source 1. The locking block 24 is slidably installed on the outer circumferential surface of the upper base plate 21 along the radial direction of the upper base plate 21. The driving source 1 is used to drive the locking block 24 to move. When the through hole 221 is blocked, the driving source 1 drives the locking block 24 to move outward and abut against the lower base plate 22, thereby locking the upper base plate 21 and the lower base plate 22.

[0042] like Figure 2 , Figure 3 , Figure 5 As shown, the driving source 1 includes a screw 1 25 rotatably mounted in the upper base plate 21 and a motor 1 (not shown in the figure) connected to the screw 1 25 at the output end, and the screw 1 25 is threadedly engaged with the locking block 24.

[0043] like Figure 2 , Figure 3As shown, the locking mechanism 3 includes a connecting hook 31, a block 32 and a second driving source. The connecting hook 31 is installed on the upper end surface of the upper base plate 21, and the block 32 is slidably installed on the drill tube 1 in the horizontal direction. A groove for cooperating with the block 32 is provided on the side of the connecting hook 31. When the drill bit digs a hole, the upper base plate 21 is coaxial with the drill tube 1. At this time, the second driving source drives the block 32 to be engaged in the groove. When the drill tube 1 is full and the drill tube 1 is withdrawn from the pile foundation hole, the second driving source drives the block 32 to withdraw from the groove. At this time, the upper base plate 21 and the lower base plate 22 flip downward under the action of gravity, and then the soil and stones in the drill tube 1 slide out of the drill tube 1.

[0044] like Figure 4 As shown, the second driving source includes a second screw 33 rotatably mounted on the drill tube 1 and a second motor whose output end cooperates with the second screw 33 , and the second screw 33 is threadedly engaged with the clamping block 32 .

[0045] The specific working principle of the embodiment of the present invention is as follows:

[0046] When drilling the ground, the rotary drilling rig controls the drill bit to abut against the ground and then controls the drill bit to rotate forward. The rotary drilling teeth 224 are subjected to the friction of the ground, causing the lower bottom plate 22 and the upper bottom plate 21 to rotate relative to each other. After the through hole 1 211 and the through hole 221 are connected, the lower bottom plate 22 abuts against the limit block 214. Then, when the upper bottom plate 21 rotates, the lower bottom plate 22 is driven to rotate through the limit block 214. When the drill tube 1 is full, the drill tube 1 reverses and drives the upper bottom plate 21 to reverse. At this time, the lower bottom plate 22 is subjected to the friction of the ground and rotates relative to the upper bottom plate 21. As the upper bottom plate 21 rotates, the upper bottom plate 21 is driven through the gear ring 1. 236 drives the gear 235 to rotate, and then drives the gear ring 237 to rotate in the opposite direction, so that the telescopic plates 1 231 and 233 on the front and rear sides of the through hole 221 are close to each other to block the through hole 221. When there is a stone in the through hole 1 211, the telescopic plates 1 231 and 233 will compress the compression spring 1 and the compression spring 2 respectively after abutting against the stone, thereby clamping the stone. When the drill tube 1 is withdrawn from the pile foundation hole, the motor 2 drives the block 32 to withdraw from the groove. At this time, the upper base plate 21 and the lower base plate 22 are flipped downward under the action of gravity, and then the soil and stones in the drill tube 1 slide out of the drill tube 1.

[0047] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A pile foundation construction device, comprising a drill tube, a locking mechanism, an upper base plate and a lower base plate, wherein the upper base plate is hinged at the lower end of the drill tube, and the lower base plate is rotatably mounted on the lower end surface of the upper base plate, and a through hole 1 and a through hole 2 for feeding into the drill tube are respectively opened on the upper base plate and the lower base plate, wherein: Also includes: A plurality of arc-shaped telescopic plates 1 are arranged in the through hole 1 along the radial direction of the upper bottom plate, and the lengths of the plurality of telescopic plates 1 gradually increase from the inside to the outside. The telescopic plates 1 are slidably mounted on the upper bottom plate along the circumferential direction of the upper bottom plate. An elastic member 1 is arranged between the telescopic plates 1 and the upper bottom plate. When the drill tube is full, the upper bottom plate is reversed so that the telescopic plates 1 block the through hole 2. When there is a stone in the through hole 1, the telescopic plates 1 will compress the elastic member 1 after contacting the stone. A locking assembly is arranged on the upper base plate, and the locking assembly includes a locking block slidably mounted on the outer circumferential surface of the upper base plate along the radial direction of the upper base plate and a driving source 1 for driving the locking block to move; when the through hole 2 is blocked, the driving source 1 drives the locking block to move outward and abut against the lower base plate, thereby locking the upper base plate and the lower base plate; A rotating frame and a driving assembly for driving the rotating frame to rotate are rotatably mounted on the upper bottom plate. A plurality of arc-shaped telescopic plates 2 are arranged on the rotating frame along the radial direction of the drill tube, and the lengths of the plurality of telescopic plates 2 gradually increase from the inside to the outside. The telescopic plates 2 are slidably mounted on the rotating frame along the circumferential direction of the drill tube. An elastic member 2 is arranged between the telescopic plates 2 and the upper bottom plate. When the through hole 2 is opened, the telescopic plates 1 and 2 are respectively located at the front and rear sides of the through hole 2. When the drill tube is full, the telescopic plates 1 and 2 on both sides of the through hole 2 are close to each other to block the through hole 2. The inner arc surfaces of the telescopic plate 1 and the telescopic plate 2 are both provided with arc-shaped track grooves, and the outer arc surfaces of the telescopic plate 1 and the telescopic plate 2 are both provided with arc-shaped slide bars for cooperating with the adjacent track grooves; The locking mechanism includes a connecting hook arranged on the upper base plate, a block arranged on the drill tube for sliding in the horizontal direction, and a driving source for driving the block to move. A groove for cooperating with the block is provided on the side of the connecting hook. When the upper base plate is coaxial with the drill tube, the block is clamped in the groove.

2. A pile foundation construction device according to claim 1, characterized in that: The driving assembly includes a gear rotatably mounted on the lower base plate, a gear ring 1 fixedly mounted on the upper base plate, and a gear ring 2 fixedly mounted on the rotating frame, and the upper and lower sides of the gear are respectively meshed with the gear ring 1 and the gear ring 2.

3. A pile foundation construction device according to claim 1, characterized in that: The ends of the telescopic plate 1 and the telescopic plate 2 that are close to each other are both provided with protrusions for abutting against stones.

4. A pile foundation construction device according to claim 3, characterized in that: A vibration motor is arranged inside the protrusion to make the protrusion vibrate.

5. A pile foundation construction device according to claim 1, characterized in that: The driving source 1 includes a lead screw 1 arranged in the upper base plate and a motor 1 whose output end is connected to the lead screw 1, and the lead screw 1 is threadedly engaged with the locking block.

6. A pile foundation construction device according to claim 1, characterized in that: The second driving source comprises a second lead screw arranged on the drill tube and a second motor whose output end cooperates with the second lead screw, and the second lead screw is threadedly engaged with the clamping block.

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