Pile driver for civil engineering construction

Abstract

The invention relates to the technical field of pile drivers, discloses a pile driver for civil engineering construction, and aims to solve the problem that a pile body is inclined when hit by a pile hammer. When the fixed block is hit by the hammer body, the clamping block on the fixed block tends to move towards the bottom end of the pile body, so that the clamping block clings to the side wall of the pile body and tightly clamps the pile body, and the pile body is prevented from deviating when being hit and vibrated; moreover, the hammer body hits the fixing block, so that the auxiliary hammer device hits the fixing block to drive the pile body to move downwards, and the construction efficiency of the pile body is improved; when the hammer body and the supporting rod move up and down along with the pile hammer, the hammer body drives the power rod and the sliding block to reciprocate, positive pressure and negative pressure are circularly generated in pressure grooves in the upper side and the lower side of the sliding block, and when the hammer body moves downwards, high pressure is generated in a pressure groove in the lower end of the sliding block, so that the telescopic bag pushes the lower end of the clamping block to be tightly attached to the side wall of a pile body, and the friction force between the clamping block and the pile body is increased; and relative sliding between the pile body and the clamping block is prevented.

Description

Technical Field

[0001] The present application relates to the technical field of pile drivers, and in particular to a pile driver for civil engineering construction. Background Art

[0002] Civil engineering construction refers to the process of building products at designated locations through effective organizational methods and technical means in accordance with the requirements of engineering design documents and relevant standards. In the process of civil engineering construction, the pile foundation construction step requires a pile driver, which is mainly used to drive pile foundations into the ground to provide support and reinforcement for buildings.

[0003] A pile driver is generally composed of a pile frame, a hydraulic system, a pile hammer, a control system and ancillary equipment (such as a power system, a transmission device, a cooling system, etc.). In the process of the pile hammer of the pile driver striking the pile body, the pile body gradually enters the ground. Due to certain differences in geological structures at different locations and different degrees of hardness, the pile body may produce a certain displacement during the downward movement of the pile body due to vibration. At this time, continued impact will cause the pile body to topple. Although some existing pile drivers are equipped with fixing devices at the position of the pile frame, there is still a certain gap between the pile body and the fixing device. As the distance between the pile hammer and the fixing device decreases, even if the angle of the pile body displacement is only the position of the gap between the pile body and the fixing device, the bottom end of the pile body will still have a large displacement, thereby affecting the piling effect. Summary of the invention

[0004] The present application proposes a pile driver for civil engineering construction, which has the advantage of preventing the pile body from deflecting during pile driving, and is used to solve the problem of the pile body tilting when the pile hammer hits the pile body.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a pile driver for civil engineering construction, comprising a pile driver, a pile frame, a support frame, a hydraulic system, a pile hammer, a fixing ring, a control system and ancillary equipment, wherein the pile frame is provided with a slide groove at a position close to the bottom end on a side away from the pile driver, and a fixing device is provided in the slide groove, and the fixing device comprises: a support platform, one side of which is fixedly installed at the bottom end in the slide groove; a plurality of supporting springs, fixedly installed on the support platform; a fixing block, fixedly connected to the upper ends of the plurality of supporting springs, and one side is slidably installed in the slide groove; a plurality of mounting grooves, which are provided on the inner side wall of the fixing block; a plurality of hinged shafts, which are fixedly installed in the mounting groove; a clamping block, which is movably sleeved on the hinged shaft; auxiliary hammer devices are provided on both sides of the fixing block, and the auxiliary hammer device comprises: a hammer body, which is sleeved on both sides of the fixing block; a support rod, which is fixedly installed on the top end of the hammer body; a clamping mechanism, which is fixedly installed on both sides of the pile hammer and is used to clamp the support rod.

[0006] Furthermore, the clamping mechanism includes: a shell, fixedly mounted on the side wall of the pile hammer; a support ring, fixedly mounted in the shell; an extrusion block, a ring array is arranged on the support ring; a gear ring is arranged between the support ring and the inner wall of the shell, and the gear ring is provided with a plurality of inclined surfaces on the inner wall close to the extrusion block, and the gear ring pushes the extrusion block to move toward the axis when the gear ring rotates; a stepper motor, fixedly mounted on the top of the shell, and a gear is fixedly sleeved on the output shaft, and the gear is meshed with the gear ring.

[0007] Furthermore, the fixed block is provided with: a pressure groove, which is opened in the fixed block; a slider, and a sliding seal is installed in the pressure groove; a power rod, which passes through the slider, and the upper and lower ends pass through the fixed block and the support platform, and the upper and lower ends of the power rod are fixedly connected to the hammer body; a telescopic bag, one end of which is fixedly connected to the upper and lower ends of the clamping block close to the pressure groove, and the other end is embedded in the fixed block, the telescopic bag at the lower end of the clamping block is connected to the bottom end of the pressure groove through a pipeline, and the telescopic bag at the upper end of the clamping block is connected to the top end of the pressure groove through a pipeline.

[0008] Furthermore, a ball is embedded at the top end of the inner side wall of the clamping block.

[0009] Furthermore, a plurality of one-way valves are fixedly mounted on the fixed blocks above and below the pressure groove, the one-way valves are connected to the bottom end of the hammer body through a connecting pipe, and a pressure relief valve is fixedly mounted on the telescopic bag.

[0010] Furthermore, the flow direction of the one-way valve is from the outside to the inside of the pressure tank, and the flow direction of the pressure relief valve is from the inside of the bellows to the outside of the bellows.

[0011] Furthermore, a dust exhaust groove is provided on the inner side wall of the fixed block, a dust exhaust block for sealing the dust exhaust groove is provided in the dust exhaust groove, fixed grooves are provided on the fixed blocks above and below the dust exhaust block, an electromagnetic block is fixedly installed at one end of the fixed groove away from the dust exhaust block, an elastic block and a permanent magnet block are connected to the electromagnetic block in sequence, the permanent magnet block is clamped on the dust exhaust block, and the electromagnetic block is electrically connected to the control system.

[0012] Furthermore, when the electromagnetic block is energized, it generates a magnetic force that attracts the permanent magnet block.

[0013] Furthermore, a filtering device is fixedly installed on the pipeline of the pressure tank and the telescopic bag.

[0014] This application has the following beneficial effects: 1. The present application provides a pile driver for civil engineering construction. When the pile driver hammer strikes the top of the pile body, the hammer strikes the fixed block, so that the clamping block at the inner wall of the fixed block tends to move toward the bottom of the pile body, so that the clamping block is close to the side wall of the pile body and tightly clamps the lower end of the pile body, thereby preventing the pile body from deviating when it is struck and vibrated; and the hammer strikes the fixed block, so that the fixed block drives the clamping block to clamp the side wall of the pile body, so that the auxiliary hammer device strikes the fixed block to drive the pile body downward, thereby accelerating the construction efficiency of the pile body.

[0015] 2. The present application provides a pile driver for civil engineering construction. When the hammer body and the support rod move up and down with the pile hammer, the hammer body drives the power rod and the slider to move back and forth, so that positive pressure and negative pressure are circulated in the pressure grooves on the upper and lower sides of the slider. When moving downward, high pressure is generated in the pressure groove at the lower end of the slider, and the high-pressure gas enters the telescopic bag at the lower end of the clamping block, pushing the lower end of the clamping block to fit tightly against the side wall of the pile body, thereby increasing the friction between the clamping block and the pile body and preventing relative sliding between the pile body and the clamping block.

[0016] 3. The present application provides a pile driver for civil engineering construction. When the slider moves up and down with the power rod and the hammer body, negative pressure is circulated in the pressure grooves on the upper and lower sides of the slider. The negative pressure absorbs the dust generated under the auxiliary hammer device and collects the dust to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0018] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which: Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the structure of the pile frame, the supporting frame body, the fixing device and the auxiliary hammer device of the present invention; Figure 3 For the present invention Figure 2 A cross-sectional view of the middle fixing device and the auxiliary hammer device; Figure 4 is a cross-sectional view of the clamping mechanism of the present invention; Figure 5 It is a schematic diagram of the structure of the fixing device and the auxiliary hammer device of the present invention; Figure 6 It is a cross-sectional view of the fixing device and the auxiliary hammer device of the present invention from the power rod; Figure 7 It is a cross-sectional view of the fixing device and the auxiliary hammer device of the present invention from the dust removal block.

[0019] In the figure: 1, pile driver; 2, pile frame; 201, slide; 3, support frame; 4, hydraulic system; 5, pile hammer; 6, fixing ring; 7, fixing device; 701, support platform; 702, support spring; 703, fixing block; 704, mounting groove; 705, clamping block; 706, hinge shaft; 707, ball; 708, pressure groove; 709, slider; 710, power rod; 711, telescopic bag; 712, one-way valve; 713, connecting pipe; 714, dust removal block; 715, fixing groove; 716, permanent magnet block; 717, elastic block; 718, electromagnetic block; 8, auxiliary hammer device; 801, hammer body; 802, support rod; 803, clamping mechanism; 804, shell; 805, extrusion block; 806, gear ring; 807, gear; 808, stepping motor; 9, pile body. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. Example

[0021] See also Figure 1-Figure 3 A pile driver for civil engineering construction includes a pile driver 1, a pile frame 2, a support frame body 3, a hydraulic system 4, a pile hammer 5, a fixing ring 6, a control system and ancillary equipment (the control system and the ancillary equipment are existing equipment and are not shown in the figure. The control system and the ancillary equipment are fixedly installed above the pile driver 1). A pile frame 2 is fixedly installed at one end of the pile driver 1. The pile frame 2 is vertically arranged. A support frame body 3 that can slide up and down is installed on the side of the pile frame 2 away from the pile driver 1. A hydraulic system 4 is fixedly installed at the top of the inner wall of the support frame body 3. The output end of the hydraulic system 4 faces downward. A pile hammer 5 is fixedly installed on the output end of the hydraulic system 4, and the pile hammer 5 is slidably installed in the support frame body 3. A fixing ring 6 is fixedly installed at the bottom end of the support frame body 3. The fixing ring 6 is used to limit the top of the pile body 9.

[0022] See also Figure 1-Figure 3A slide groove 201 is provided at a position near the bottom end of the pile frame 2 away from the pile driver 1. A fixing device 7 is provided in the slide groove 201. The fixing device 7 includes a support platform 701, a support spring 702, a fixing block 703, a clamping block 705 and a hinge shaft 706. One side of the support platform 701 is fixedly installed at the bottom end of the slide groove 201, and the support platform 701 is directly below the fixing ring 6. A plurality of support springs 702 are fixedly installed on the support platform 701. The upper ends of the plurality of support springs 702 are fixedly connected to the same fixing block 703. One side of the fixing block 703 is slidably installed in the slide groove 201. Please refer to Figure 5 and Figure 6 The inner wall array of the fixed block 703 is provided with a plurality of mounting grooves 704, in which a plurality of hinge shafts 706 are fixedly installed, and a clamping block 705 is movably sleeved on the hinge shaft 706; please refer to Figure 1-Figure 3 , auxiliary hammer devices 8 are provided on both sides of the fixed block 703, and the auxiliary hammer device 8 includes a hammer body 801, a support rod 802 and a clamping mechanism 803. The hammer body 801 is sleeved on both sides of the fixed block 703, and the top of the hammer body 801 is fixedly installed with a support rod 802, and the support rod 802 is vertically arranged, and the top of the support rod 802 is higher than the highest position of the pile hammer 5. Clamping mechanisms 803 are fixedly installed on both sides of the pile hammer 5, and the clamping mechanisms 803 are used to clamp the support rod 802; before piling, the bottom end of the clamping block 705 is close to the outer wall of the pile body 9. During piling, the hydraulic system 4 drives the pile hammer 5 to move up, and at the same time, the clamping mechanism 803 clamps the support rod 802, driving the support rod 802 and the hammer body 801 to move up synchronously. After moving up to the specified position, the clamping mechanism 803 releases the support rod 802. The supporting rod 802 is clamped, and the pile hammer 5 strikes the pile body 9 at the lower end. At the same time, the hammer body 801 moves downward under the action of its own gravity and strikes the upper end surface of the fixed block 703. At this time, the clamping block 705 on the inner wall of the fixed block 703 tends to move toward the bottom end of the pile body 9. Under the action of the friction between the clamping block 705 and the pile body 9, the clamping block 705 rotates around the hinge shaft 706, so that the lower end of the clamping block 705 is further close to the side wall of the pile body 9, and the pile body 9 is tightly clamped, thereby preventing the pile body 9 from deflecting when it is struck and vibrated; and the hammer body 801 strikes the fixed block 703, so that the fixed block 703 drives the clamping block 705 to clamp the side wall of the pile body 9, so that the auxiliary hammer device 8 strikes the fixed block 703 to drive the pile body 9 to move downward, thereby accelerating the construction efficiency of the pile body 9.

[0023] See also Figure 2 and Figure 4The clamping mechanism 803 includes a shell 804, an extrusion block 805, a gear ring 806, a gear 807 and a stepper motor 808. The shell 804 is fixedly installed on the side wall of the pile hammer 5. A support ring is fixedly installed in the shell 804. A movable extrusion block 805 is arranged in an annular array on the support ring. A rotatable gear ring 806 is arranged between the support ring and the inner wall of the shell 804. The gear ring 806 is provided with a plurality of inclined surfaces near the inner wall of the extrusion block 805. When the gear ring 806 rotates, the extrusion block 805 can be pushed to move toward the axis. A stepper motor 808 is fixedly installed on the top of the shell 804. The output shaft of the stepper motor 808 is inserted into the shell 804, and a gear 807 is fixedly sleeved on the output shaft in the shell 804. The gear 807 is meshed with the gear ring 806.

[0024] The working principle of the first embodiment of the present invention is as follows: Before use, use auxiliary equipment to lift the pile body 9 to the required position, that is, insert the top of the pile body 9 into the fixing ring 6, insert the lower part of the pile body 9 into the middle of the fixing device 7, the bottom end of the clamping block 705 is close to the outer wall of the pile body 9, and the bottom end of the pile body 9 is inserted into the prefabricated positioning groove on the ground.

[0025] See also Figure 1-Figure 6 When piling, the hydraulic system 4 drives the pile hammer 5 to move upward. At the same time, the clamping mechanism 803 clamps the support rod 802, driving the support rod 802 and the hammer body 801 to move upward synchronously. After moving to the specified position, the clamping mechanism 803 releases the clamping of the support rod 802, and the pile hammer 5 hits the pile body 9 at the lower end. At the same time, the hammer body 801 moves downward under the action of its own gravity and hits the upper end surface of the fixed block 703. At this time, the clamping block 705 on the inner wall of the fixed block 703 tends to move toward the bottom end of the pile body 9. Under the action of the friction force between the clamping block 705 and the pile body 9, the clamping block 705 rotates around the hinge shaft 706, so that the lower end of the clamping block 705 is further close to the side wall of the pile body 9, tightly clamping the pile body 9, thereby preventing the pile body 9 from deviating when it is hit and vibrated; and the hammer body 801 strikes the fixed block 703, so that the fixed block 703 drives the clamping block 705 to clamp the side wall of the pile body 9, so that the auxiliary hammer device 8 strikes the fixed block 703 to drive the pile body 9 to move downward, thereby accelerating the construction efficiency of the pile body 9. Example

[0026] Embodiment 2 is a further improvement on embodiment 1.

[0027] The difference from the first embodiment is that, please refer to Figure 5-Figure 7A pressure groove 708 is provided in the fixed block 703, and a slider 709 is installed in the pressure groove 708 in a sliding seal. A power rod 710 is passed through the slider 709, and the slider 709 and the power rod 710 are fixedly installed. The upper and lower ends of the power rod 710 pass through the fixed block 703 and the support platform 701, and the upper and lower ends of the power rod 710 are fixedly connected to the hammer body 801. The upper and lower ends of the clamping block 705 close to the pressure groove 708 are fixedly connected with a telescopic bag 711, and the other end of the telescopic bag 711 is embedded in the fixed block 703. The telescopic bag 711 at the lower end of the clamping block 705 is connected to the bottom end of the pressure groove 708 through a pipeline, and the telescopic bag 711 at the upper end of the clamping block 705 is connected to the top of the pressure groove 708 through a pipeline; when the pile hammer 5 drives the auxiliary hammer device 8 to move upward, the hammer body 801 of the auxiliary hammer device 8 drives the power rod 710 and the slider 709 to move upward, and the upwardly moved slider 709 The gas in the pressure groove 708 at the upper end of the slider 709 is squeezed, so that the gas at the upper end of the slider 709 enters the telescopic bag 711 on the upper side wall of the clamping block 705, and pushes the clamping block 705 to rotate around the hinge shaft 706, so that the lower end of the clamping block 705 is away from the side wall of the pile body 9, so that the lower end of the clamping block 705 no longer rubs against the side wall of the pile body 9; when the secondary hammer device 8 moves downward, the hammer body 801 of the secondary hammer device 8 drives the power rod 710 and the slider 709 to move downward. Block 709 moves downward, and the downward moving slider 709 squeezes the gas in the pressure groove 708 at the lower end of the slider 709, so that the gas at the lower end of the slider 709 enters the telescopic bag 711 on the lower side wall of the clamping block 705, pushing the clamping block 705 to rotate around the hinge shaft 706, so that the lower end of the clamping block 705 is close to the side wall of the pile body 9, strengthening the friction between the lower end of the clamping block 705 and the side wall of the pile body 9, and preventing relative sliding between the pile body 9 and the clamping block 705.

[0028] See also Figure 6 When the upper end of the side wall of the clamping block 705 contacts the side wall of the pile body 9, the upper end of the side wall of the clamping block 705 and the side wall of the pile body 9 are changed to rolling friction, thereby reducing the friction between the upper end of the side wall of the clamping block 705 and the side wall of the pile body 9.

[0029] See also Figure 5-Figure 7 A plurality of one-way valves 712 are fixedly installed on the fixed blocks 703 above and below the pressure grooves 708. The one-way valves 712 are connected to the bottom end of the hammer body 801 through the connecting pipe 713. A pressure relief valve is fixedly installed on the telescopic bag 711. In the process of the auxiliary hammer device 8 moving up and down, the hammer body 801 drives the power rod 710 and the slider 709 to move synchronously. When the slider 709 moves upward, a negative pressure is generated in the pressure groove 708 at the bottom of the slider 709. When the slider 709 moves downward, a negative pressure is generated in the pressure groove 708 at the upper end of the slider 709. At this time, the negative pressure absorbs the dust generated below the auxiliary hammer device 8 and collects the dust to a certain extent.

[0030] The flow direction of the one-way valve 712 is from the outside to the pressure tank 708 to replenish the gas in the pressure tank 708; the flow direction of the pressure relief valve is from the inside of the bellows 711 to the outside of the bellows 711, and the pressure relief valve is used to relieve the high-pressure gas in the bellows 711 and the pressure tank 708.

[0031] See also Figure 5-Figure 7 The inner wall of the fixed block 703 is provided with a dust discharge groove, and a dust discharge block 714 for sealing the dust discharge groove is provided in the dust discharge groove. Fixed grooves 715 are provided on the fixed block 703 above and below the dust discharge block 714. An electromagnetic block 718 is fixedly installed at one end of the fixed groove 715 away from the dust discharge block 714. The electromagnetic block 718 is connected with an elastic block 717 and a permanent magnet block 716 in sequence. The permanent magnet block 716 is clamped on the dust discharge block 714 to fix the dust discharge block 714. The electromagnetic block 718 is electrically connected to the control system. When the electromagnetic block 718 is energized, it generates a magnetic field with the permanent magnet block 716 attract each other by magnetic force; after the piling is completed, the control system energizes the electromagnetic block 718, and the electromagnetic block 718 attracts the permanent magnet block 716, so that the permanent magnet block 716 squeezes the elastic block 717, and the permanent magnet block 716 releases a certain restriction on the dust discharge block 714. Under the action of the gravity of the dust discharge block 714, the dust discharge block 714 slides outward along the inclined surface of the dust discharge groove, thereby opening the dust discharge groove blocked by the dust discharge block 714, and the dust in the pressure groove 708 is discharged to the side wall of the pile body 9 through the dust discharge groove, filling the gap between the side wall of the pile body 9 and the positioning groove.

[0032] A filtering device is fixedly installed on the pipeline between the pressure tank 708 and the bellows 711 , and the filtering device filters the dust in the pressure tank 708 to prevent the dust in the pressure tank 708 from entering the bellows 711 .

[0033] The working principle of the second embodiment of the present invention is as follows: See also Figure 1-Figure 7When the pile hammer 5 drives the auxiliary hammer device 8 to move upward, the hammer body 801 of the auxiliary hammer device 8 drives the power rod 710 and the slider 709 to move upward, and the upward slider 709 squeezes the gas in the pressure groove 708 at the upper end of the slider 709, so that the gas at the upper end of the slider 709 enters the telescopic bag 711 on the upper side wall of the clamping block 705, pushing the clamping block 705 to rotate around the hinge shaft 706, so that the lower end of the clamping block 705 is away from the side wall of the pile body 9, so that the lower end of the clamping block 705 no longer rubs against the side wall of the pile body 9; When the auxiliary hammer 8 moves downward, the hammer body 801 of the auxiliary hammer device 8 drives the power rod 710 and the slider 709 to move downward, and the slider 709 that moves downward squeezes the gas in the pressure groove 708 at the lower end of the slider 709, so that the gas at the lower end of the slider 709 enters the telescopic bag 711 at the lower side wall of the clamping block 705, and pushes the clamping block 705 to rotate around the hinge shaft 706, so that the lower end of the clamping block 705 is closely attached to the side wall of the pile body 9, and the friction between the lower end of the clamping block 705 and the side wall of the pile body 9 is strengthened, so as to prevent the pile body 9 and the clamping block 705 from sliding relative to each other; During the up and down movement of the auxiliary hammer device 8, the hammer body 801 drives the power rod 710 and the slider 709 to move synchronously. When the slider 709 moves upward, negative pressure is generated in the pressure groove 708 at the bottom of the slider 709. When the slider 709 moves downward, negative pressure is generated in the pressure groove 708 at the upper end of the slider 709. At this time, the negative pressure absorbs the dust generated below the auxiliary hammer device 8 and collects the dust to a certain extent.

[0034] After the piling is completed, the control system energizes the electromagnetic block 718, which attracts the permanent magnet block 716, so that the permanent magnet block 716 squeezes the elastic block 717, and the permanent magnet block 716 releases the restriction on the dust removal block 714. Under the action of the gravity of the dust removal block 714, the dust removal block 714 slides outward along the bottom of the dust removal groove, thereby opening the dust removal groove blocked by the dust removal block 714, and the dust in the pressure groove 708 is discharged to the side wall of the pile body 9 through the dust removal groove, filling the gap between the side wall of the pile body 9 and the positioning groove.

Claims

1. A pile driver for civil engineering construction, comprising a pile driver (1), a pile frame (2), a support frame (3), a hydraulic system (4), a pile hammer (5), a fixing ring (6), a control system and auxiliary equipment, characterized in that: A slide groove (201) is provided at a position close to the bottom end of the pile frame (2) away from the pile driver (1), and a fixing device (7) is provided in the slide groove (201). The fixing device (7) comprises: A support platform (701) with one side fixedly mounted on the bottom end of the slide groove (201); A plurality of support springs (702) are fixedly mounted on the support platform (701); A fixed block (703) is fixedly connected to the upper ends of the plurality of support springs (702), and one side of the fixed block is slidably mounted in the slide groove (201); A plurality of mounting grooves (704) are provided on the inner side wall of the fixing block (703); A plurality of hinge shafts (706) fixedly mounted in the mounting grooves (704); A clamping block (705) is movably sleeved on the hinge shaft (706); Auxiliary hammer devices (8) are provided on both sides of the fixed block (703), and the auxiliary hammer device (8) comprises: The hammer body (801) is sleeved on both sides of the fixed block (703); A support rod (802) is fixedly mounted on the top of the hammer body (801); The clamping mechanism (803) is fixedly mounted on both sides of the pile hammer (5) and is used to clamp the support rod (802).

2. A pile driver for civil engineering construction according to claim 1, characterized in that: The clamping mechanism (803) comprises: A housing (804) is fixedly mounted on a side wall of the pile hammer (5); A support ring, fixedly mounted in the housing (804); Extrusion blocks (805), arranged in an annular array on the support ring; A gear ring (806) is disposed between the support ring and the inner wall of the housing (804); the gear ring (806) is provided with a plurality of inclined surfaces near the inner wall of the extrusion block (805); when the gear ring (806) rotates, it pushes the extrusion block (805) to move toward the axis; The stepper motor (808) is fixedly mounted on the top of the housing (804), and a gear (807) is fixedly sleeved on the output shaft, and the gear (807) is meshed with the gear ring (806).

3. A pile driver for civil engineering construction according to claim 1, characterized in that: The fixing block (703) is provided with: A pressure groove (708) is provided in the fixed block (703); A slider (709) is installed in a sliding seal in the pressure groove (708); A power rod (710) passes through the slider (709), and the upper and lower ends of the power rod (710) pass through the fixed block (703) and the support platform (701). The upper and lower ends of the power rod (710) are fixedly connected to the hammer body (801); The telescopic bag (711) has one end fixedly connected to the upper end and the lower end of the clamping block (705) near the pressure groove (708), and the other end is embedded in the fixed block (703). The telescopic bag (711) at the lower end of the clamping block (705) is connected to the bottom end of the pressure groove (708) through a pipeline, and the telescopic bag (711) at the upper end of the clamping block (705) is connected to the top end of the pressure groove (708) through a pipeline.

4. A pile driver for civil engineering construction according to claim 3, characterized in that: A ball (707) is embedded at the top end of the inner wall of the clamping block (705).

5. A pile driver for civil engineering construction according to claim 3, characterized in that: A plurality of one-way valves (712) are fixedly mounted on the fixed blocks (703) above and below the pressure groove (708); the one-way valves (712) are connected to the bottom end of the hammer body (801) via a connecting pipe (713); and a pressure relief valve is fixedly mounted on the telescopic bag (711).

6. A pile driver for civil engineering construction according to claim 5, characterized in that: The flow direction of the one-way valve (712) is from the outside to the inside of the pressure groove (708), and the flow direction of the pressure relief valve is from the inside of the bellows (711) to the outside of the bellows (711).

7. A pile driver for civil engineering construction according to claim 5, characterized in that: A dust discharge groove is provided on the inner side wall of the fixed block (703), a dust discharge block (714) for sealing the dust discharge groove is provided in the dust discharge groove, fixed grooves (715) are provided on the fixed blocks (703) above and below the dust discharge block (714), an electromagnetic block (718) is fixedly mounted on one end of the fixed groove (715) away from the dust discharge block (714), an elastic block (717) and a permanent magnet block (716) are connected to the electromagnetic block (718) in sequence, the permanent magnet block (716) is clamped on the dust discharge block (714), and the electromagnetic block (718) is electrically connected to a control system.

8. A pile driver for civil engineering construction according to claim 7, characterized in that: When the electromagnetic block (718) is energized, it generates a magnetic force that attracts the permanent magnet block (716).

9. A pile driver for civil engineering construction according to claim 7, characterized in that: A filtering device is fixedly mounted on the pipelines of the pressure tank (708) and the telescopic bag (711).

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