Pile clamping mechanism of hydraulic static pile driver

Abstract

The static pile driver comprises a machine body and a pile pressing mechanism installed on the machine body, the pile pressing mechanism comprises a supporting part, a pile pressing piece and a pile clamping mechanism body, the pile pressing piece is connected with the pile clamping mechanism body and drives the pile clamping mechanism body to do linear reciprocating motion, and the outer side face of the pile clamping mechanism body is in sliding fit with the supporting part. The pile clamping mechanism comprises a pile clamping box and at least one pile clamping assembly, each pile clamping assembly comprises multiple pile clamping oil cylinders and multiple pile clamping jaws, and the multiple pile clamping jaws of each pile clamping assembly are arranged at intervals in the circumferential direction of the pile clamping hole and connected with and drive the multiple pile clamping jaws to do linear reciprocating motion. The pile clamping mechanism can clamp pile foundations with different diameters and sections, the contact area of the pile clamping jaw and the pile foundations is large, a sliding friction pair is formed between the pile clamping mechanism and the supporting part, the extrusion stress of the pile clamping box body to the stand column is reduced, it is guaranteed that the running direction of the pile clamping mechanism relative to the supporting part is stable, and the pile clamping mechanism is suitable for inclined piles and medium straight piles.

Description

Technical Field

[0001] The utility model belongs to the technical field of pile drivers, in particular to a pile clamping mechanism of a hydraulic static pile driver. Background Art

[0002] Static pressure construction of precast piles is a new type of environmentally friendly pile foundation construction method that uses static pressure to steadily press precast piles into the foundation. At present, static pressure pile construction has been widely used in domestic pile foundation construction. In addition to static pressure piles for precast piles, static pressure pile construction is also widely used for H-shaped steel piles, steel pipe piles and other special-shaped steel piles. Hydraulic static construction has the advantages of clean site, no noise, no vibration, no sewage, no smoke and dust, fast pile pressing speed and high efficiency. It is suitable for operation in urban areas with special requirements for the environment. Hydraulic static pile driver is currently the most widely used equipment for static pressure construction.

[0003] At present, with the development of urban high-rise buildings and the limitation of urban land resources, the demand for underground space utilization has increased. The current deep foundation pit is getting deeper and deeper, and the construction period is short. Therefore, the difficulty of deep foundation construction is getting greater and greater, and the requirements for pile foundation and deep foundation pit support are getting higher and higher. The traditional support method can no longer meet the needs of deep foundation pit support. The current deep foundation pit support process is to use static pile pressure technology to press prefabricated rectangular piles obliquely into the foundation. This construction method has high efficiency and reliable pile quality, and has been widely used. The pile foundation that is inclined relative to the horizontal plane when entering the soil and after being pressed into the foundation is an inclined pile, and the pile foundation that is perpendicular to the horizontal plane when entering the soil and after being pressed into the foundation is a medium straight pile.

[0004] The inclined pile driver for inclined pile driving in the prior art has some disadvantages. For example, the current inclined pile driver is mainly used for inclined pile driving and has a single function. During the process of pile clamping and pile driving, the parts in contact with the pile clamping box are subjected to greater stress, and the clamping stress of the pile clamping box on the pile foundation is too large. Utility Model Content

[0005] In view of the above-mentioned problems existing in the prior art, the purpose of the utility model is to provide a pile clamping mechanism of a hydraulic static pile driver, which can clamp pile foundations of different diameters and cross-sections. The contact area between the pile clamping jaws and the pile foundation is large, which improves the clamping stability of the pile foundation and reduces the probability of damage to the pile foundation. A sliding friction pair is formed between the pile clamping mechanism and the support part. The sliding friction pair is guided to increase the contact area, reduce the extrusion stress of the pile clamping box on the column, improve the stability of pile pressing, and extend the service life of the product. The support part also plays a guiding role to ensure the stability of the running direction of the pile clamping mechanism relative to the support part. The above-mentioned cooperation between the pile clamping mechanism and the support part keeps the relative position relationship and force relationship between the pile clamping mechanism and the support part stable and stable when the pile pressing mechanism rotates, which is suitable for the pile pressing of inclined piles and medium straight piles.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A pile clamping mechanism of a hydraulic static pile driver, the static pile driver comprising a machine body and a pile clamping mechanism mounted on the machine body, the pile clamping mechanism comprising a support portion, a pile clamping member mounted on the support portion, and a pile clamping mechanism, the pile clamping member is connected to and drives the pile clamping mechanism to move back and forth in a straight line, the support portion has an enclosed space, the enclosed space is used to accommodate the pile clamping mechanism and allow the pile foundation to pass through, the outer side of the pile clamping mechanism and the support portion are slidably matched, the pile clamping mechanism comprises a pile clamping box body and at least one group of pile clamping components mounted on the pile clamping box body, the pile clamping components include a pile clamping oil The pile clamp box is a box structure, and a through hole is provided on the pile clamp box for the pile foundation to pass through, which is the pile clamp hole. Each group of the pile clamping assemblies is provided with multiple pile clamping cylinders and pile clamping jaws. The pile clamping jaws are located in the pile clamping hole and are used to clamp the pile foundation. The multiple pile clamping jaws are arranged at intervals along the circumference of the pile clamping hole. The multiple pile clamping cylinders are respectively connected and drive the multiple pile clamping jaws to reciprocate in a straight line, and the moving direction is perpendicular to the length direction of the pile clamping hole. When two or more groups of pile clamping assemblies are provided, each group of pile clamping assemblies is arranged along the length direction of the pile clamping hole.

[0008] As a further improvement of the above technical solution:

[0009] The pile-pressing mechanism is rotatably mounted on the machine body. The static pile-pressing machine further comprises a swing oil cylinder, one end of which is hinged on the machine body and the other end of which is connected to the pile-pressing mechanism.

[0010] The pile clamping mechanism further comprises a friction reducing strip, which is mounted on the outer surface of the pile clamping box body and directly contacts the supporting part.

[0011] The pile clamping mechanism also includes a plurality of pile feeders for guiding when feeding piles. The pile feeders are mounted on the upper end surface of the pile clamping box body. The plurality of pile feeders are arranged at intervals around the entrance of the pile clamping hole. The pile feeders can move toward or away from the center line of the pile clamping hole.

[0012] The pile feeder includes a base, a telescopic rod and a limit pin. The base is fixedly installed on the top of the pile clamping box. The base is a sleeve structure. The telescopic rod passes through the base and can move back and forth in a straight line. A plurality of through holes are also provided on the side wall of the base. The telescopic rod is provided with at least one through hole. When the telescopic rod moves along the base, the through holes on the telescopic rod can be aligned and connected with different through holes on the base in sequence. When the through holes on the telescopic rod are connected with the through holes on the base, the limit pin is passed through the through holes on the base and the through holes on the telescopic rod, and the telescopic rod is locked on the base.

[0013] The end of the telescopic rod close to the pile clamping hole includes a straight plate and an inclined plate connected in sequence, the straight plate is parallel to the center line direction of the pile clamping hole, the lower end of the inclined plate is connected to the upper end of the straight plate, and the upper end is inclined upward in a direction away from the pile clamping hole.

[0014] The piston rod of the pile clamping oil cylinder is connected to the pile clamping box body, and the cylinder barrel of the pile clamping oil cylinder is connected to the pile clamping jaws.

[0015] The support part includes a support block, a connecting piece and a main shaft. There are two support blocks, which are arranged in parallel and spaced apart. The support part formed by the two support blocks and the connecting pieces has an enclosed space. There are two main shafts, which are respectively connected to the two support blocks and are rotatably mounted on the fuselage.

[0016] The support block includes a support seat, a column, and a cross beam. There are two columns, which are arranged in parallel and spaced apart. The lower end of the column is fixedly connected to the upper end of the support seat. The upper ends of the two columns are connected by a cross beam. The outer side surface of the pile clamping mechanism is slidably matched with the column. One end of the pile pressing piece is installed on the cross beam and the other end is connected to the pile clamping mechanism.

[0017] The pile driving device is a hydraulic cylinder.

[0018] The beneficial effects of the utility model are:

[0019] (1) The pile clamping jaws of the pile clamping mechanism are movable so that the pile clamping jaws can clamp pile foundations of different diameters and cross-sections. Two or more pile clamping assemblies can be provided and arranged along the length direction of the pile clamping hole, so that the contact area between the pile clamping jaws and the pile foundation is large, thereby improving the clamping stability of the pile foundation and reducing the probability of causing damage to the pile foundation.

[0020] (2) The pile clamping mechanism is provided with friction-reducing strips in the circumferential direction and is slidably matched with the support part, so that a sliding friction pair is formed between the pile clamping mechanism and the support part. The sliding friction pair is guided to increase the contact area, reduce the extrusion stress of the pile clamping box on the column, improve the stability of the pile pressing, and extend the service life of the product. The support part also plays a guiding role to ensure the stability of the running direction of the pile clamping mechanism relative to the support part.

[0021] (3) The above-mentioned cooperation between the pile clamping mechanism and the support part enables the relative position relationship and force relationship between the pile clamping mechanism and the support part to remain smooth and stable when the pile pressing mechanism rotates, which is suitable for pressing inclined piles and medium straight piles. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The utility model is a structural schematic diagram of a pile driving mechanism of a hydraulic static pile driver according to an embodiment of the utility model.

[0023] Figure 2 It is a schematic diagram of the state when the pile pressing mechanism of one embodiment of the utility model is located in two positions.

[0024] Figure 3 It is a structural schematic diagram of a support block without a crossbeam according to an embodiment of the utility model.

[0025] Figure 4 It is a structural schematic diagram of a pile clamping mechanism of an embodiment of the utility model.

[0026] Figure 5 It is a structural schematic diagram of a pile feeder according to an embodiment of the utility model. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0028] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0029] A pile clamping mechanism of a hydraulic static pile driver, such as Figures 1 to 5 As shown, the static pile driver comprises a body 5, a pile driving mechanism and a swing cylinder 4. The pile driving mechanism is rotatably mounted on the body 5. One end of the swing cylinder 4 is hinged to the body 5 and the other end is connected to the pile driving mechanism.

[0030] Pile pressing mechanism Figure 1 and 2 As shown, it comprises a support part 2, a pile pressing member 3 and a pile clamping mechanism 1. The pile clamping mechanism 1 is used to clamp the pile foundation, and the pile clamping mechanism 1 is slidably arranged on the support part 2, and the pile pressing member 3 is connected to and drives the pile clamping mechanism 1 to move back and forth in a straight line.

[0031] Support part 2 Figure 1 and 3As shown, it includes a support block, a connecting member 22 and a main shaft 23. There are two support blocks, and the two support blocks are arranged in parallel and spaced apart. The two support blocks are connected by a plurality of connecting members 22. Specifically, the two ends of the connecting member 22 are respectively connected to the side surfaces of the two support blocks, so that the support portion 2 structure formed by the two support blocks and the connecting members 22 has an enclosed space, and the enclosed space is used to accommodate the pile clamping mechanism 1 and for the pile foundation to pass through. In other words, the two support blocks and the connecting members 22 are equivalent to being located on four adjacent faces of a rectangular parallelepiped, and the four adjacent faces enclose a space that can accommodate the pile clamping mechanism 1, and the two support blocks are respectively located on two opposite faces of the rectangular parallelepiped, and the connecting members 22 are respectively located on the other two opposite faces of the rectangular parallelepiped.

[0032] In this embodiment, the connecting member 22 is a rod-shaped structure. Four connecting members 22 are provided, and the four connecting members 22 are symmetrically arranged on both sides of the support block.

[0033] Support blocks such as 1 and Figure 3 As shown, it includes a support seat 211, a column 212, a crossbeam 213, a swing cylinder connecting piece 214, a limit hinge seat 215, and a connecting beam 216. There are two columns 212, which are arranged in parallel and spaced apart. The lower end of the column 212 is fixedly connected to the upper end of the support seat 211, and the upper ends of the two columns 212 are connected by the crossbeam 213, that is, the two ends of the crossbeam 213 are respectively connected to the upper ends of the two columns 212. The crossbeam 213 and the column 212 are fixedly connected by a pin shaft. The connecting beam 216 is located between the crossbeam 213 and the support seat 211, and the two ends of the connecting beam 216 are respectively connected to the two columns 212, and the swing cylinder connecting piece 214 is installed on the connecting beam 216. The limit hinge seat 215 is connected to the side of the support seat 211 or the side of the column 212. The limit hinge 215 can fix the support block on the fuselage 5. Specifically, a pin is passed through the limit hinge 215 and the connecting seat on the fuselage 5, so that the support block is fixed relative to the fuselage 5 and does not rotate. The limit hinge 215 and the connecting member 22 are located on the same side of the support block.

[0034] There are two main shafts 23, and the two main shafts 23 are respectively connected to the two support seats 211 of the two support blocks. Preferably, the main shaft 23 is welded to the support seat 211, and the main shaft 23 and the swing cylinder connecting member 214 are located on the same side of the support block. One end of the main shaft 23 is fixedly connected to the support seat 211, and the other end is used to connect with the fuselage 5. The two main shafts 23 are located outside the space surrounded by the two support blocks and the connecting members 22. In other words, each main shaft 23 is connected to a side of a support seat 211 away from the other support seat 211. Preferably, the two main shafts 23 are located on the same straight line. The pile pressing mechanism is installed on the fuselage 5 through the two main shafts 23, and the main shaft 23 is rotatably installed on the fuselage 5, so that the pile pressing mechanism can rotate relative to the fuselage 5. Specifically, the main shaft 23 is a stepped shaft, and a shaft sleeve is installed on the fuselage 5, and the main shaft 23 is installed on the shaft sleeve. In this embodiment, the shaft sleeve is made of steel.

[0035] There are two swing cylinders 4, which are respectively connected to the two support blocks. The swing cylinders 4 are connected and drive the support blocks to rotate around the main shaft 23. Specifically, the cylinder body of the swing cylinder 4 is hinged on the fuselage 5, and the piston rod of the swing cylinder 4 is connected to the swing cylinder connector 214. Under the push of the swing cylinder 4, the support block and the pile clamping mechanism 1 can reach the required tilt angle, which is suitable for pile foundations with different tilt angles.

[0036] When the limit hinge 215 is fixed on the fuselage 5, the column 212 is perpendicular to the plane where the fuselage 5 is located. At this time, when the plane where the fuselage 5 is located is parallel to the horizontal plane, the pile pressing mechanism can be used for pressing the middle straight pile, and the support part 2 can be fixed relative to the fuselage 5 without starting the swing cylinder 4. Figure 2 A is a schematic diagram showing a vertical state of the column 212 and the fuselage 5, and B is a schematic diagram showing a state in which the column 212 and the fuselage 5 are relatively inclined and can be used for inclined pile pressing.

[0037] The swing cylinder 4 is equipped with a double balancing valve or a two-way balancing valve, which can ensure that the swing cylinder 4 is stable during the inclined pile pressing process, thereby ensuring that the angle of the inclined pile remains stable during the pile pressing process. The double balancing valve is connected to the swing cylinder 4. The technical solution of connecting the double balancing valve to the swing cylinder 4 to achieve stable cylinder movement is a prior art and will not be repeated here.

[0038] The pile clamping mechanism 1 is located in the space surrounded by the two support blocks and the connecting members 22. Figure 4 and 5As shown, the pile clamping mechanism 1 includes a pile clamping box 11 and a pile feeder 13, a pile pressing seat 14, a friction reducing strip 15 and at least one group of pile clamping components installed on the pile clamping box 11. The pile clamping component includes a pile clamping cylinder 121 and a pile clamping jaw 122. The pile clamping box 11 is a box structure as a whole, and a through hole for the pile foundation to pass through is provided on the pile clamping box 11, which is a pile clamping hole 16. Each group of the pile clamping components is provided with a plurality of pile clamping cylinders 121 and pile clamping jaws 122. The pile clamping jaws 122 are located in the pile clamping hole 16 and are used to clamp the pile foundation. The plurality of pile clamping jaws 122 are arranged at intervals along the circumference of the pile clamping hole 16. The plurality of pile clamping cylinders 121 are respectively connected to the plurality of pile clamping jaws 122 , which are connected and driven to move linearly back and forth in a direction perpendicular to the length direction of the pile clamping hole 16 , so that the pile clamping jaws 122 can clamp pile foundations of different diameters and sections.

[0039] In this embodiment, two groups of pile clamping assemblies are provided. The two groups of pile clamping assemblies are arranged in an upper and lower layer structure, that is, arranged along the length direction of the pile clamping hole 16, thereby increasing the pile clamping area and enhancing the pile clamping force.

[0040] Preferably, the piston rod of the pile clamping cylinder 121 is connected to the pile clamping box 11, and the cylinder barrel of the pile clamping cylinder 121 is connected to the pile clamping jaws 122, that is, the piston rod of the pile clamping cylinder 121 and the pile clamping box 11 are relatively fixed, and it is the cylinder body of the pile clamping cylinder 121 that moves relative to the pile clamping box 11, that is, the pile clamping cylinder 121 is an inverted structure. The above arrangement of the pile clamping cylinder 121 makes the cylinder body and the piston rod of the pile clamping cylinder 121 move more smoothly in the axial direction of the piston rod, greatly reduces the probability of the piston rod moving relative to the cylinder body in the radial direction of the piston rod, and reduces the probability of oil leakage of the pile clamping cylinder 121. At the same time, the above arrangement of the pile clamping cylinder 121 can withstand a large pile clamping force and pile pressing reaction force.

[0041] The pile feeder 13 is used for guiding when feeding piles. The pile feeder 13 is installed on the upper end surface of the pile clamping box 11 to guide the pile foundation passing through the pile clamping box 11 from above the pile clamping box 11. There are multiple pile feeders 13, and the multiple pile feeders 13 are arranged at intervals around the entrance of the pile clamping hole 16. The pile feeder 13 can move in the direction close to or away from the center line of the pile clamping hole 16.

[0042] In this embodiment, four pile feeders 13 are provided.

[0043] Specifically, the pile feeder 13 is as follows: Figure 5As shown, it includes a base 131, a telescopic rod 132 and a limit pin. The base 131 is fixedly installed on the top of the pile clamp box 11, and the base 131 is a sleeve structure. The telescopic rod 132 passes through the base 131 and can move back and forth in a straight line. A plurality of through holes are also provided on the side wall of the base 131, and at least one through hole is provided on the telescopic rod 132. When the telescopic rod 132 moves along the base 131, the through holes on the telescopic rod 132 can be aligned and connected with different through holes on the base 131 in sequence. When the through holes on the telescopic rod 132 are connected with the through holes on the base 131, the limit pin is passed through the through holes on the base 131 and the through holes on the telescopic rod 132, and the telescopic rod 132 is locked on the base 131. The movable setting of the telescopic rod 132 makes the pile feeder 13 suitable for piles of different types and different cross-sectional sizes, and has good applicability.

[0044] A plurality of telescopic rods 132 are arranged at intervals around the entrance of the pile clamp hole 16. The end of the telescopic rod 132 near the pile clamp hole 16 includes a straight plate and an inclined plate connected in sequence. The straight plate is parallel to the centerline direction of the pile clamp hole 16. The lower end of the inclined plate is connected to the upper end of the straight plate, and the upper end is inclined upward in a direction away from the pile clamp hole 16. In this way, the ends of the telescopic rods 132 near the pile clamp hole 16 form a trumpet-shaped opening, which guides the pile body when feeding the pile, so that the pile body passes through the pile clamp box 11 more smoothly. If there is no pile feeder 13 for guidance, the pile foundation is easy to bump and collide with the pile clamp box 11 when passing through the pile clamp box 11, resulting in damage to the pile clamp box 11 and the pile body.

[0045] In this embodiment, two rows of through holes are provided on the base 131 , and the arrangement direction of each row of through holes is parallel to the moving direction of the telescopic rod 132 .

[0046] The pile pressing seat 14 is installed on the top surface of the pile clamping box 11, and the pile pressing seat 14 is used to connect with the pile pressing member 3. Two pile pressing seats 14 are provided.

[0047] The friction-reducing strip 15 is installed on the outer surface of the pile clamping box 11. When the pile clamping mechanism 1 moves, the friction-reducing strip 15 and the column 212 of the support block directly contact and slide relative to each other to generate friction, thereby preventing the pile clamping box 11 from directly generating friction with the support block. That is, the column 212 also acts as a track, and the pile clamping box 11 and the column 212 are guided by a sliding friction pair, thereby increasing the contact area, reducing the squeezing stress of the pile clamping box 11 on the column 212, improving the stability of the pile pressing, and extending the service life of the product. Furthermore, a separate guide belt can be provided, which is in direct contact with the friction-reducing strip 15 to prevent the column 212 from directly contacting the friction-reducing strip 15, and a guide belt is installed on each column 212.

[0048] There are two pile-pressing members 3, which are respectively mounted on two cross beams 213. The pile-pressing members 3 are connected to and drive the pile clamping mechanism 1 to move back and forth in a straight line. The two pile-pressing members 3 are respectively connected to two pile-pressing seats 14, that is, one end of the pile-pressing member 3 is mounted on the cross beam 213, and the other end is connected to the pile-pressing seat 14. The connection beam 216 and the pile-pressing member 3 are staggered so as not to interfere with the movement of the pile-pressing member 3.

[0049] In this embodiment, the pile pressing member 3 is a hydraulic cylinder.

[0050] Based on the above structure, the working principle and process of the utility model are as follows: when pressing the inclined pile, first, the swing cylinder 4 drives the support part 2 to rotate the support part 2. After the swing cylinder 4 rotates to a set angle, it stops driving and stabilizes at the angle. Then, the pile foundation is lifted by a crane, and the pile foundation is inserted into the pile pressing mechanism. Under the guidance of the pile feeder 13, the pile foundation passes through the pile clamping hole 16 smoothly. Next, the pile clamping cylinder 121 drives the pile clamping jaws 122 to make the pile clamping jaws 122 contact and clamp the pile foundation. Finally, the pile pressing member 3 is started, and the pile pressing member 3 drives the pile clamping mechanism 1. The pile clamping mechanism 1 drives the pile foundation to move synchronously. The pile foundation moves one step, and the pile clamping jaws 122 release the pile foundation. After that, the pile pressing member 3 drives the pile clamping mechanism 1 to move in the opposite direction. The pile clamping jaws 122 clamp the pile foundation again. The pile pressing member 3 drives the pile clamping mechanism 1 to move, so that the pile foundation moves forward one step. This is repeated, so that the pile foundation is gradually moved to the set position inserted into the foundation. During the movement of the pile clamping mechanism 1, the friction reducing strips 15 of the pile clamping mechanism 1 and the column 212 or the guide belt on the column 212 are in direct contact and generate sliding friction. The pile clamping mechanism 1 can only move in a straight line under the constraint and guidance of the column 212. In addition, the rotation angle of the support part 2 can be detected by existing electrical components such as angle sensors. When pressing the pile straight, a pin is passed through the limit hinge seat 215 and the connecting seat on the fuselage 5. At this time, the length direction of the pile clamping hole 16 is perpendicular to the horizontal plane, and there is no need to stabilize the position of the pile pressing mechanism by the swing cylinder 4.

[0051] Finally, it is necessary to explain here that the above embodiments are only used to further illustrate the technical solution of the utility model in detail and cannot be understood as limiting the protection scope of the utility model. Some non-essential improvements and adjustments made by technicians in this field based on the above content of the utility model belong to the protection scope of the utility model.

Claims

1. A pile clamping mechanism of a hydraulic static pile driver, characterized in that: The static pile driver comprises a machine body (5) and a pile driving mechanism installed on the machine body (5); the pile driving mechanism comprises a support part (2), a pile driving member (3) installed on the support part (2), and a pile clamping mechanism (1); the pile driving member (3) is connected to and drives the pile clamping mechanism (1) to move back and forth linearly; the support part (2) has an enclosed space, the enclosed space is used to accommodate the pile clamping mechanism (1) and allow the pile foundation to pass through; the outer side surface of the pile clamping mechanism (1) and the support part (2) are slidably matched; the pile clamping mechanism (1) comprises a pile clamping box body (11) and at least one group of pile clamping components installed on the pile clamping box body (11); the pile clamping components comprise a pile clamping oil cylinder (121) and a pile clamping jaw (122); The pile box (11) is a box structure. The pile clamping box (11) is provided with a through hole for the pile foundation to pass through, which is a pile clamping hole (16). Each group of the pile clamping assemblies is provided with a plurality of pile clamping cylinders (121) and pile clamping jaws (122). The pile clamping jaws (122) are located in the pile clamping hole (16) and are used to clamp the pile foundation. The plurality of pile clamping jaws (122) are arranged at intervals along the circumference of the pile clamping hole (16). The plurality of pile clamping cylinders (121) are respectively connected to and drive the plurality of pile clamping jaws (122) to move linearly back and forth, and the moving direction is perpendicular to the length direction of the pile clamping hole (16). When two or more groups of pile clamping assemblies are provided, each group of pile clamping assemblies is arranged along the length direction of the pile clamping hole (16).

2. The pile clamping mechanism according to claim 1, characterized in that: The pile-pressing mechanism is rotatably mounted on the machine body (5). The static pile-pressing machine further comprises a swing cylinder (4). One end of the swing cylinder (4) is hinged on the machine body (5) and the other end is connected to the pile-pressing mechanism.

3. The pile clamping mechanism according to claim 1, characterized in that: The pile clamping mechanism (1) further comprises a friction reducing strip (15), which is mounted on the outer surface of the pile clamping box (11), and the friction reducing strip (15) directly contacts the supporting portion (2).

4. The pile clamping mechanism according to claim 1, characterized in that: The pile clamping mechanism (1) further comprises a plurality of pile feeders (13) for guiding when feeding piles. The pile feeders (13) are mounted on the upper end surface of the pile clamping box (11). The plurality of pile feeders (13) are arranged at intervals around the entrance of the pile clamping hole (16). The pile feeders (13) can move in a direction close to or away from the center line of the pile clamping hole (16).

5. The pile clamping mechanism according to claim 4, characterized in that: The pile feeder (13) comprises a base (131), a telescopic rod (132) and a limit pin. The base (131) is fixedly mounted on the top of the pile clamp box (11). The base (131) is a sleeve structure. The telescopic rod (132) passes through the base (131) and can move back and forth in a straight line. A plurality of through holes are also arranged on the side wall of the base (131). The telescopic rod (132) is provided with at least one through hole. When the telescopic rod (132) moves along the base (131), the through holes on the telescopic rod (132) can be aligned and connected with different through holes on the base (131) in sequence. When the through holes on the telescopic rod (132) are connected with the through holes on the base (131), the limit pin passes through the through holes on the base (131) and the through holes on the telescopic rod (132), and then the telescopic rod (132) is locked on the base (131).

6. The pile clamping mechanism according to claim 5, characterized in that: One end of the telescopic rod (132) close to the pile clamp hole (16) comprises a straight plate and an inclined plate connected in sequence, the straight plate is parallel to the center line direction of the pile clamp hole (16), the lower end of the inclined plate is connected to the upper end of the straight plate, and the upper end is inclined upward in a direction away from the pile clamp hole (16).

7. The pile clamping mechanism according to claim 1, characterized in that: The piston rod of the pile clamping oil cylinder (121) is connected to the pile clamping box (11), and the cylinder barrel of the pile clamping oil cylinder (121) is connected to the pile clamping jaws (122).

8. The pile clamping mechanism according to any one of claims 1 to 7, characterized in that: The support part (2) comprises a support block, a connecting piece (22) and a main shaft (23). Two support blocks are provided. The two support blocks are arranged in parallel and spaced apart. The support part (2) formed by connecting the two support blocks and the connecting pieces (22) has an enclosed space. Two main shafts (23) are provided. The two main shafts (23) are respectively connected to the two support blocks. The two main shafts (23) are rotatably mounted on the fuselage (5).

9. The pile clamping mechanism according to claim 8, characterized in that: The support block comprises a support seat (211), a column (212), and a crossbeam (213); two columns (212) are provided, and the two columns (212) are arranged in parallel and spaced apart; the lower end of the column (212) is fixedly connected to the upper end of the support seat (211); the upper ends of the two columns (212) are connected via the crossbeam (213); the outer side surface of the pile clamping mechanism (1) and the column (212) are slidably matched; one end of the pile pressing member (3) is mounted on the crossbeam (213), and the other end is connected to the pile clamping mechanism (1).

10. The pile clamping mechanism according to claim 1, characterized in that: The pile pressing member (3) is an oil cylinder.

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