Steel sheet pile sinking and detachable vibration clamping sleeve device and construction method thereof

Abstract

This invention discloses a detachable vibratory clamping sleeve device for sheet pile driving and its construction method, relating to the field of sheet pile construction technology. It includes a clamping sleeve assembly for clamping the bottom end of the sheet pile; a pneumatic vibration mechanism detachably mounted on the clamping sleeve assembly for generating reciprocating vibration to assist sheet pile driving; and an elastic release mechanism positioned between the clamping sleeve assembly and the sheet pile for quickly detaching the clamping sleeve assembly from the sheet pile after driving. In this invention, the vibration acts directly on the pile end, effectively reducing driving resistance: by setting a pneumatic vibration mechanism at the tail end of the sheet pile, compressed air drives a piston and vibrating rod to reciprocately strike the bottom of the vibrating cylinder, directly applying the vibration source to the soil layer near the pile end. This avoids the attenuation during energy transmission in traditional top-driven pile driving, effectively disturbing and damaging local hard soil layers such as hard interlayers and pebble layers, improving the penetration ability and construction adaptability of sheet piles in alternating soft and hard geological formations.

Description

Technical Field

[0001] This invention relates to the field of steel sheet pile construction and underground engineering support construction technology, specifically to a detachable vibration clamping sleeve device for steel sheet pile driving and its construction method. Background Technology

[0002] Steel sheet piles are a common type of support structure component. Due to their high strength, fast construction speed, and reusability, they are widely used in foundation pit support, cofferdam projects, and underground structure construction. Current steel sheet pile construction typically uses a top vibratory hammer, static pressure equipment, or pile driving equipment to apply power from the top of the steel sheet pile, causing it to gradually sink into the soil under external force.

[0003] However, under the geological conditions of alternating soft and hard layers, the traditional top-pile driving method is prone to the following problems: First, when the vibration force is transmitted from the top of the steel sheet pile to the bottom of the pile, it needs to go through a long transmission path through the pile body. The energy will be attenuated during the transmission process, resulting in insufficient actual soil breaking vibration capacity obtained at the pile end.

[0004] Secondly, when the bottom end of the sheet pile encounters a relatively hard soil layer, sand layer, gravel layer or local hard interlayer, the pile end is prone to jamming. Although the top vibration can make the pile body vibrate as a whole, its direct effect on local soil breaking and penetration of hard layers at the pile bottom is limited.

[0005] Third, in traditional top-vibration pile driving, the pile head is subjected to significant stress, which can easily lead to problems such as localized deformation of the pile head, damage to the connection points, or excessive construction noise. Fourth, existing auxiliary pile driving devices are mostly located on the top or outside of the sheet pile, with few structures that directly apply vibration to the bottom of the sheet pile. Even if a bottom auxiliary structure exists, it often suffers from problems such as complex installation, difficulty in detachment after pile driving, and difficulty in recovery.

[0006] Therefore, it is necessary to propose an auxiliary vibratory pile driving device set at the bottom of the sheet pile, so that it can apply vibration directly from the bottom of the sheet pile during the pile driving process and can be easily detached and retrieved after the pile driving is completed, thereby improving the construction adaptability of sheet piles in alternating soft and hard geological layers. Summary of the Invention

[0007] The purpose of this invention is to provide a detachable vibration clamping sleeve device for steel sheet pile driving, which solves the problems of insufficient soil breaking capacity at the pile bottom, low vibration energy transmission efficiency, obvious local hard layer jamming, and difficulty in detaching the bottom auxiliary device in traditional steel sheet pile top driving methods in soft and hard layered geological conditions. This technology can be applied to foundation pit support, cofferdam construction, underground pipe gallery construction, temporary retaining structures, riverbank protection, and steel sheet pile driving construction under soft and hard layered geological conditions.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A detachable vibratory clamping sleeve device for driving sheet piles includes: a clamping sleeve assembly, an elastic release mechanism, and a pneumatic vibration drive mechanism; the clamping sleeve assembly is disposed at the bottom of the sheet pile and includes three V-shaped clamping sleeves corresponding to the middle surface and two sides of the sheet pile, respectively, and the three V-shaped clamping sleeves are used to clamp the bottom end of the sheet pile during the driving process.

[0010] A pneumatic vibration mechanism, detachably mounted on the clamping sleeve assembly, is used to generate reciprocating vibration to assist in the driving of sheet piles.

[0011] An elastic release mechanism is provided between the clamping sleeve assembly and the sheet pile, and is used to quickly release the clamping sleeve assembly from the sheet pile after pile driving is completed.

[0012] Furthermore, the V-shaped clamping sleeve includes a first clamping arm and a second clamping arm, the downward ends of the first clamping arm and the second clamping arm are hinged to each other, and the first clamping arm and the second clamping arm rotate along the hinge to form a V-shaped structure for accommodating the tail end of the steel sheet pile, and the tip of the V-shaped structure faces downward.

[0013] Furthermore, the longitudinal length of the first clamping arm is greater than that of the second clamping arm; the elastic release mechanism includes multiple springs, one end of which is fixedly connected to the side wall of the first or second clamping arm facing the surface of the sheet pile, and the other end is used to abut against the surface of the sheet pile.

[0014] Furthermore, the pneumatic vibration mechanism includes an air pump, a pipeline, and a vibration cylinder. The air pump is connected to the inner cavity of the vibration cylinder through the pipeline to supply or evacuate air. A control valve is provided on the pipeline. The vibration cylinder is detachably connected to the clamping sleeve assembly.

[0015] Furthermore, the vibrating cylinder is made of a magnetically conductive material, and an electromagnet is embedded on the surface of the clamping sleeve assembly. When the electromagnet is energized, it generates a magnetic attraction force to attract and fix the vibrating cylinder.

[0016] Furthermore, the upper end of the vibrating cylinder is open and fixedly connected to a cover, the cover is provided with a pipe joint, and the pipe joint is connected to the pipeline; a stop block is fixedly installed in the inner cavity of the vibrating cylinder, and the stop block and the cover form an air storage chamber, which is connected to the pipeline.

[0017] Furthermore, the pneumatic vibration mechanism also includes a vibration rod and a piston. The vibration rod is slidably mounted on the stop block and slides freely along the axial direction of the vibration cylinder. One end of the vibration rod extending to the air storage chamber is fixedly connected to the piston. The piston can slide freely along the axial direction in the inner cavity of the vibration cylinder.

[0018] Furthermore, a stop ring is fixedly sleeved at one end of the vibrating rod located below the stop block. The outer diameter of the stop ring is smaller than the inner diameter of the vibrating cylinder cavity. A return spring is provided between the lower end face of the stop ring and the inner bottom wall of the vibrating cylinder cavity. The two ends of the return spring abut against the stop ring and the inner bottom wall of the vibrating cylinder, respectively.

[0019] Furthermore, the lower surface of the vibrating cylinder is provided with a vent hole, and the stop block is provided with a through hole for the vibrating rod to pass through freely. The diameter of the through hole is larger than the outer diameter of the vibrating rod, which is used to exhaust air when the piston moves down to reduce resistance.

[0020] Furthermore, each sheet pile is equipped with three clamping sleeve assemblies, which are respectively clamped to the two sides and the middle part of the bottom of the sheet pile.

[0021] The construction method of the detachable vibration clamping sleeve device for steel sheet pile driving includes the following steps:

[0022] S1, hoist the sheet pile to the construction position and install the clamping sleeve assembly at the bottom of the sheet pile;

[0023] S2, adjust the position of the three V-shaped clamping sleeves so that they correspond to the middle surface and two sides of the sheet pile respectively, while ensuring that the long clamping arm faces the outside of the groove of the sheet pile or the preset disengagement direction.

[0024] S3 puts the elastic release mechanism in a pre-tightened state, so that the clamping sleeve can stably clamp the bottom of the steel sheet pile;

[0025] S4, connect the air pump to the pneumatic vibration unit, start the air pump, and the pneumatic vibration unit will generate vibration by inflating and deflating air;

[0026] S5, under the combined action of external pressing force, pile self-weight or other pile driving equipment, the steel sheet pile gradually sinks into the soil layer with the assistance of bottom vibration;

[0027] S6. Once the sheet pile has sunk to the designed depth, the pneumatic vibration unit will stop operating.

[0028] S7, slightly lift the sheet pile, so that the clamping sleeve can be released from the bottom of the sheet pile in a predetermined direction under the action of the elastic release mechanism;

[0029] S8, the clamping sleeve is released from the bottom of the sheet pile under the action of the elastic release mechanism;

[0030] S9, by retrieving the clamping sleeve assembly through the recycling connector, completes one construction cycle.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] (1) The construction device of the present invention acts directly on the pile end, effectively reducing the pile driving resistance: by setting a pneumatic vibration mechanism at the tail end of the steel sheet pile, compressed air drives the piston and vibrating rod to reciprocate to strike the bottom of the vibrating cylinder, so that the vibration source acts directly on the soil layer near the pile end. This avoids the attenuation in the energy transmission process of traditional top pile driving, and can effectively disturb and destroy local hard soil layers such as hard interlayers and gravel layers, greatly improving the penetration ability and construction adaptability of steel sheet piles in soft and hard interlayered geology.

[0033] (2) Achieving rapid disengagement and convenient retrieval: The clamping sleeve assembly adopts an asymmetrical V-shaped hinge structure with a first clamping arm (long) and a second clamping arm (short), and a spring is installed between the clamping arm and the sheet pile. After the pile is driven into place, the sheet pile only needs to be slightly lifted, and the V-shaped structure will automatically disengage from the sheet pile (short side direction) under the action of the spring force, realizing rapid separation of the device from the sheet pile, which is convenient for subsequent easy retrieval using tools such as traction ropes, and solving the problem of difficult disengagement of traditional bottom auxiliary devices.

[0034] (3) Modular quick-release design for efficient installation: The vibratory cylinder is made of magnetic material and is magnetically fixed by an electromagnet embedded in the second clamping arm. This detachable connection method makes the installation and disassembly of the pneumatic vibration mechanism extremely simple and quick, without the need for complicated tools, thus improving construction efficiency.

[0035] (4) High vibration efficiency and reasonable structural design: The pneumatic system achieves high-frequency reciprocating vibration through the cyclic action of "supplying air to press down and knocking - pumping air and moving the reset spring upward", which is highly responsive. At the same time, the large-diameter perforation on the block and the ventilation hole at the bottom of the vibrating cylinder effectively discharge the air squeezed when the piston moves down, reduce the motion resistance, and make the vibration impact more rapid and powerful.

[0036] (5) Protect the pile head and reduce construction damage: The bottom auxiliary vibration shares the soil breaking resistance during the pile driving process, reduces the excessive reliance on the main vibration source at the top of the steel sheet pile, thereby reducing the risk of local deformation of the pile head and damage to the connection parts, and also helps to reduce construction noise. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of a detachable vibration clamping sleeve device for steel sheet pile driving according to the present invention.

[0038] Figure 2 for Figure 1 A schematic diagram showing the positional relationship of the structure from another perspective;

[0039] Figure 3 This is a schematic diagram showing the positional relationship of the vibrating cylinder, pipe joint, and baffle after assembly in this invention;

[0040] Figure 4 for Figure 3 A schematic diagram showing the positional relationship of the middle section after it has been cut open;

[0041] Figure 5 for Figure 3 Schematic diagram of the positional relationships of the central structure after explosive decomposition;

[0042] Figure 6 This is a flowchart of the process construction technology of the present invention;

[0043] The following are the annotations for each item in the figure: 1. First clamping arm; 2. Pipeline; 3. Sheet pile; 4. Second clamping arm; 5. Spring; 6. Control valve; 7. Air pump; 8. Pipe joint; 9. Cover; 10. Vibrating cylinder; 11. Vent hole; 12. Return spring; 13. Air storage chamber; 14. Piston; 15. Stop block; 16. Vibrating rod; 17. Stop ring. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Please see Figures 1-5 This invention provides a technical solution: a detachable vibratory clamping sleeve device for sheet pile driving, comprising: a clamping sleeve assembly, an elastic release mechanism, and a pneumatic vibration drive mechanism; the clamping sleeve assembly is disposed at the bottom of the sheet pile and includes three V-shaped clamping sleeves corresponding to the middle surface and two sides of the sheet pile, respectively, which are used to clamp the bottom end of the sheet pile during the pile driving process; the pneumatic vibration mechanism is detachably installed on the clamping sleeve assembly and is used to generate reciprocating vibration to assist in the driving of the sheet pile 3; the elastic release mechanism is disposed between the clamping sleeve assembly and the sheet pile 3 and is used to quickly detach the clamping sleeve assembly from the sheet pile 3 after the pile driving is completed. By setting a pneumatic vibration mechanism at the tail end of the sheet pile, compressed air drives the piston and vibrating rod to reciprocate to strike the bottom of the vibrating cylinder, directly applying the vibration source to the soil layer near the pile end. This avoids the attenuation during the energy transmission process of traditional top-driven pile driving, effectively disturbing and destroying local hard soil layers such as hard interlayers and pebble layers, greatly improving the penetration ability and construction adaptability of sheet piles in soft and hard interlayered geology.

[0046] The bottom of the sheet pile 3 is equipped with a clamping sleeve assembly, which includes a first clamping arm 1 and a second clamping arm 4 with a rectangular outer contour. The downward-facing ends of the first clamping arm 1 and the second clamping arm 4 are hinged together. After the first clamping arm 1 and the second clamping arm 4 are rotated along the hinge, they will form a V-shaped clamping sleeve (in order to enhance the V-shape). The clamping sleeve has a strong pointed structure that can stably fit the corresponding clamping surface at the bottom of the sheet pile. The ends of the first and second clamping arms are hinged by a pin and a hinge seat, allowing the two arms to rotate flexibly around the hinge point to open and close to form a V-shaped clamping opening. At the same time, a thickened solid conical section is integrally cast at the corresponding pointed position of the two arms, so that the combined structure forms a bottom conical shape. This ensures that the hinge only transmits shear force and can rotate freely, while the pointed end forms a thick and wear-resistant conical structure, which is suitable for the force requirements of sheet pile clamping operations. The bottom of the sheet pile 3 is located between these V-shaped structures, with the pointed end of the V-shaped structure facing downwards. That is, the bottom end of the sheet pile 3 is located between the first clamping arm 1 and the second clamping arm 4. Figure 1 As shown, each sheet pile 3 is equipped with three clamping sleeve assemblies, and each clamping sleeve assembly corresponds to the two sides and the middle part of the sheet pile 3 respectively. The first clamping arm 1 and the second clamping arm 4 are used to clamp the lower end of the sheet pile 3. When driving the pile, the V-shaped structure formed by the first clamping arm 1 and the second clamping arm 4 can break the foundation relatively easily.

[0047] Combination Figures 1 to 5 As shown, and please refer to the following: Figure 2 Multiple springs 5 ​​are installed on the first clamping arm 1 and the second clamping arm 4. One end of the spring 5 in the direction of its elastic force is welded to the side wall of the first clamping arm 1 and the second clamping arm 4 facing the surface of the sheet pile 3, while the other end of the spring 5 in the direction of its elastic force abuts against the surface of the sheet pile 3. During pile driving, the first clamping arm 1 and the second clamping arm 4 experience resistance, which compresses the spring 5, causing the spring 5 to accumulate elastic potential energy. After the sheet pile 3 is driven into place, it is lifted to a certain distance, causing the sheet pile 3 to disengage from the first clamping arm 1 and the second clamping arm 4. At this time, the elastic potential energy accumulated in the spring 5 is released, such as... Figure 2 As shown, the longitudinal length of the first clamping arm 1 is greater than that of the second clamping arm 4. This design structure allows the sheet pile to be lifted slightly after it has been driven into place. The V-shaped structure will automatically detach from the sheet pile (short side direction) under the action of the spring force, realizing the rapid separation of the device from the sheet pile. This facilitates easy recovery using tools such as traction ropes and solves the problem of difficult detachment of traditional bottom auxiliary devices.

[0048] Before construction, three V-shaped clamping sleeve assemblies are installed on the middle surface and two sides of the bottom of the sheet pile 3, respectively, so that the clamping sleeve assemblies form a stable clamp with the bottom end of the sheet pile 3. During installation, the shorter side of the clamping sleeve assembly (i.e., the second clamping arm 4) is oriented towards the outside of the groove of the sheet pile 3 or the preset release direction, so that the clamping sleeve assembly can be withdrawn in this direction during subsequent release. When the bottom end of the sheet pile 3 encounters a hard interlayer, the vibration generated by the bottom clamping sleeve assembly can create local disturbance to the soil near the pile end. Combined with the self-weight of the sheet pile 3, the external pressing force, or the action of other pile driving equipment, the sheet pile 3 continues to sink.

[0049] An air pump 7 is installed on the ground, and a pipe 2 is installed on the air pump 7. A control valve 6 is installed on the pipe 2. The end of the pipe 2 away from the air pump 7 moves down with the steel sheet pile 3. A vibratory cylinder 10 is detachably connected to the surface of the second clamping arm 4. The upward-facing end of the vibratory cylinder 10 is open and fixedly connected to a cover 9. The cover 9 is provided with a pipe connector 8, which is connected to the lower end of the pipe 2, so that the pipe 2 can supply air to the inner cavity of the vibratory cylinder 10. Specifically, the vibratory cylinder 10 is made of a magnetically conductive material (such as iron, cobalt, nickel, etc.), and an electromagnet (not shown in the figure) is embedded in the surface of the second clamping arm 4. A hidden electromagnet is embedded inside the second clamping arm with a beveled mounting surface. The Tibetan-style electromagnet has its contact surface of the vibrating cylinder, made of iron-cobalt-nickel magnetic material, processed to perfectly match the inclined plane. When the electromagnet is energized, it generates magnetism, which in turn generates a magnetic attraction force on the vibrating cylinder 10, allowing the vibrating cylinder 10 to be detachably connected to the second clamping arm 4. (Specifically, the magnetic attraction force generated by the electromagnet after it is energized can directly press the vibrating cylinder 10 firmly onto the inclined plane in a direction perpendicular to the inclined plane. This magnetic force completely cancels the downward force of the vibrating cylinder's own weight along the inclined plane. Stable and detachable installation of the vibrating cylinder on the inclined plane can be achieved without additional fasteners. After the power is turned off, the magnetic attraction force disappears, and the vibrating cylinder can be directly removed. This structure can be stably placed on the ground.)

[0050] Before operating the air pump, check its operating status and the pressure of the air storage container. Confirm that all pipe joints are properly sealed and there is no risk of leakage. Then, seal the connection between the pipe and the air inlet of the vibratory cylinder, and apply sealing material to the interface to ensure no leakage under pressure. After starting the air pump, perform several no-load test runs: First, fully inflate the pump, allowing compressed gas to quickly enter the storage chamber, pushing the piston down smoothly along the stable guide rod, and causing the vibratory rod to strike the bottom wall of the vibratory cylinder at high speed. Second, start the air pump to pump air in reverse, allowing the air pressure in the storage chamber to drop rapidly. The return spring releases its elastic potential energy instantly, causing the stop ring and vibratory rod to quickly return to their original positions. Observe the status of the moving parts throughout the process to confirm that there is no jamming or abnormal noise. Third, repeat the inflation-extraction cycle to adjust the vibration frequency to the design rated value. After the entire pneumatic vibration unit is fully stable, proceed to the pile driving operation.

[0051] Combination Figures 1 to 5 As shown, and please refer to the following: Figures 3 to 5 A stop block 15 is fixedly installed inside the vibrating cylinder 10. A vibrating rod 16 passes through the stop block 15 and is coaxial with the vibrating cylinder 10. The vibrating rod 16 is slidably mounted on the stop block 15 and can slide freely along the axial direction of the vibrating cylinder 10. The stop block 15 and the cover 9 form an air storage chamber 13, which is connected to the pipeline 2. A piston 14 is fixedly connected to one end of the vibrating rod 16 extending into the air storage chamber 13. The piston 14 is coaxially engaged with the inner cavity of the vibrating cylinder 10. 14 The vibrating rod 16 can slide freely along the axial direction of the vibrating cylinder 10 in the inner cavity of the vibrating cylinder 10. A stop ring 17 is fixedly sleeved at one end of the vibrating rod 16 located below the stop block 15. The outer diameter of the stop ring 17 is smaller than the inner diameter of the inner cavity of the vibrating cylinder 10. A return spring 12 is provided between the lower end face of the stop ring 17 and the inner bottom wall of the inner cavity of the vibrating cylinder 10. The two ends of the return spring 12 elastically abut against the stop ring 17 and the inner bottom wall of the vibrating cylinder 10 respectively in the direction of the elastic force. When the vibrating rod 16 moves downward, it can be in a compressed state and accumulate elastic potential energy.

[0052] During pile driving, air pump 7 supplies air to pipeline 2, allowing compressed gas to quickly enter the vibrating cylinder 10 and exert a downward thrust on piston 14. This causes piston 14 to drive vibrating rod 16 to move rapidly downward. The rapid downward movement of vibrating rod 16 causes its lower end to strike the bottom wall of the inner cavity of vibrating cylinder 10, resulting in vibration of vibrating cylinder 10. Air pump 7 then stops supplying air to pipeline 2 and reverses the flow of gas from pipeline 2. This reduces the air pressure in the air storage chamber 13 of vibrating cylinder 10. At this time, the elastic potential energy stored in return spring 12 is released, causing stop ring 17 to drive vibrating rod 16 to move rapidly upward, which in turn causes piston 14 to move upward. Subsequently, air pump 7 supplies air to pipeline 2 again, causing piston 14 to move rapidly downward. The vibration causes the vibrating rod 16 to move back and forth continuously, thereby vibrating the soil at the bottom of the sheet pile 3. Since the vibration point is located at the bottom of the sheet pile 3, it can act more directly on the soil layer near the pile end, which helps to reduce the pile end resistance and improve the sinking ability of the sheet pile 3 in the soft and hard interlayer. Of course, when the sheet pile 3 is driven, it still needs to be driven by the vibration equipment in the existing technology. In addition, the lower surface of the vibrating cylinder 10 is provided with a vent hole 11, and the stop block 15 is provided with a through hole for the vibrating rod 16 to pass through freely. The diameter of the through hole is larger than the outer diameter of the vibrating rod 16, so that when the piston 14 moves downward, the air squeezed by the piston 14 in the air storage chamber 13 can be discharged from the through hole and the vent hole 11, thereby reducing the resistance of the piston 14 moving downward.

[0053] See appendix Figure 6 and combination Figure 1-5 The specific construction method of this invention includes the following steps:

[0054] S1. The steel sheet pile is precisely hoisted to the preset construction point, and the entire set of V-shaped clamping sleeve assembly is pre-installed at the bottom of the steel sheet pile to prepare the hardware for subsequent pile driving operations.

[0055] S2, adjust the spatial position of the three V-shaped clamping sleeves so that they are precisely aligned with the middle surface and two sides of the sheet pile, while strictly ensuring that the long clamping arm of each V-shaped clamping sleeve faces the outside of the groove of the sheet pile, which is the preset release direction, so as to reserve a structural foundation for smooth release in the future.

[0056] S3 applies a pre-tightening force to the elastic release mechanism, so that the matching spring 5 is in a compressed and energy-storing state, which drives the three V-shaped clamping sleeves to firmly hold the bottom of the steel sheet pile, ensuring that the clamping sleeves will not loosen or shift during the entire pile driving process;

[0057] S4 connects the air pump to the pneumatic vibration unit, starts the air pump, and causes the pneumatic vibration unit to generate air through inflation and deflation.

[0058] Vibration; The air pump 7 is sealed and connected to the pipeline 2 of the pneumatic vibration unit. The air pump 7 is started to alternately perform inflation and deflation operations: When inflation, compressed gas quickly enters the vibration cylinder 10, pushing the piston 14 to drive the vibration rod 16 to move downward at high speed, striking the bottom wall of the inner cavity of the vibration cylinder 10 to generate vibration; When deflation, the air pressure in the air storage chamber 13 decreases, the return spring 12 releases elastic potential energy, and drives the stop ring 17 and the vibration rod 16 to quickly return upward, thus generating a continuous high-frequency excitation force through repeated cycles;

[0059] S5, under the combined action of external pressure, the self-weight of the sheet pile or other pile driving equipment, the pneumatic vibration unit continuously applies reciprocating vibration to the soil layer at the bottom of the sheet pile, which greatly reduces the frictional resistance of the soil at the pile end, allowing the sheet pile to sink into the target soil layer smoothly and efficiently.

[0060] S6. Once the sheet pile has sunk to the designed depth, the pneumatic vibration unit will stop operating.

[0061] After confirming that the steel sheet pile has been completely sunk to the design depth through real-time monitoring, immediately shut down the air pump 7, terminate the air filling-exhausting cycle of the pneumatic vibration unit, and stop all vibration output.

[0062] S7, by slightly lifting the sheet pile with a lifting device, creates a specified gap between the bottom of the sheet pile and the clamping sleeve assembly.

[0063] The relative displacement of degrees breaks the previous clamping and locking state;

[0064] S8, the clamping sleeve detaches from the bottom of the sheet pile under the action of the elastic release mechanism; relying on the V-shaped clamping sleeve with one long and one short length...

[0065] With its symmetrical structure and the short side facing outward from the groove, the restoring force of spring 5 will drive the three clamping sleeves to simultaneously loosen towards the inside of the sheet pile, completely releasing the clamping constraints on the middle surface and two sides of the sheet pile.

[0066] S9, with the pre-installed traction ropes and other recovery connectors now fully tensioned, activates the ground traction device.

[0067] Prepare and lift the entire clamping sleeve assembly upwards at a uniform speed, keeping the traction rope vertical throughout the lifting process to prevent the clamping sleeve from swaying in the air and hitting the surrounding steel sheet piles that have already been constructed.

[0068] Once the clamping sleeve assembly is fully raised to the ground, check the deformation of the springs and the wear of the vibrating rod head one by one. Clean the dirt adhering to the assembly, reapply lubricating material to all moving hinge points, and after confirming that all components are in good condition, transfer it to the work site of the next sheet pile to be constructed. At this point, the entire closed-loop process of driving a single sheet pile is completed, and the entire clamping sleeve assembly can be directly put into the next construction cycle.

[0069] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A detachable vibration clamping sleeve device for steel sheet pile driving, characterized in that, include: The assembly includes a clamping sleeve assembly, an elastic release mechanism, and a pneumatic vibration drive mechanism. The clamping sleeve assembly is located at the bottom of the sheet pile and includes three V-shaped clamping sleeves corresponding to the middle surface and two sides of the sheet pile, respectively. The three V-shaped clamping sleeves are used to clamp the bottom end of the sheet pile during the pile driving process. The pneumatic vibration mechanism is detachably mounted on the clamping sleeve assembly to generate reciprocating vibration to assist in the driving of the sheet pile (3); The elastic release mechanism is disposed between the clamping sleeve assembly and the sheet pile (3) and is used to quickly release the clamping sleeve assembly from the sheet pile (3) after the pile driving is completed.

2. The detachable vibration clamping sleeve device for steel sheet pile driving according to claim 1, characterized in that, The V-shaped clamping sleeve includes a first clamping arm (1) and a second clamping arm (4). The lower ends of the first clamping arm (1) and the second clamping arm (4) are hinged to each other. After the first clamping arm (1) and the second clamping arm (4) rotate along the hinge, they form a V-shaped structure for accommodating the tail end of the sheet pile (3), and the tip of the V-shaped structure faces downward.

3. The detachable vibration clamping sleeve device for steel sheet pile driving according to claim 2, characterized in that, The longitudinal length of the first clamping arm (1) is greater than that of the second clamping arm (4); the elastic release mechanism includes a plurality of springs (5), one end of which is fixedly connected to the side wall of the first clamping arm (1) or the second clamping arm (4) facing the surface of the sheet pile (3), and the other end is used to abut against the surface of the sheet pile (3).

4. The detachable vibration clamping sleeve device for steel sheet pile driving according to claim 1, characterized in that, The pneumatic vibration mechanism includes an air pump (7), a pipeline (2) and a vibrating cylinder (10). The air pump (7) is connected to the inner cavity of the vibrating cylinder (10) through the pipeline (2) to supply or evacuate air. A control valve (6) is provided on the pipeline (2). The vibrating cylinder (10) is detachably connected to the clamping sleeve assembly.

5. A detachable vibration clamping sleeve device for steel sheet pile driving according to claim 4, characterized in that, The vibrating cylinder (10) is made of magnetic material, and an electromagnet is embedded on the surface of the clamping sleeve assembly. When the electromagnet is energized, it generates magnetic attraction to attract and fix the vibrating cylinder (10).

6. A detachable vibration clamping sleeve device for steel sheet pile driving according to claim 4, characterized in that, The vibrating cylinder (10) has an open end facing upwards and is fixedly connected to a cover (9). The cover (9) is provided with a pipe joint (8), which is connected to the pipeline (2). A stop block (15) is fixedly installed in the inner cavity of the vibrating cylinder (10). The stop block (15) and the cover (9) form an air storage chamber (13), which is connected to the pipeline (2).

7. A detachable vibration clamping sleeve device for steel sheet pile driving according to claim 6, characterized in that, The pneumatic vibration mechanism further includes a vibration rod (16) and a piston (14). The vibration rod (16) is slidably mounted on the stop block (15) and slides freely along the axial direction of the vibration cylinder (10). One end of the vibration rod (16) extends to the air storage chamber (13) and is fixedly connected to the piston (14). The piston (14) can slide freely along the axial direction in the inner cavity of the vibration cylinder (10).

8. A detachable vibration clamping sleeve device for sheet pile driving according to claim 7, characterized in that, The vibrating rod (16) is fixedly fitted with a stop ring (17) at one end below the stop block (15). The outer diameter of the stop ring (17) is smaller than the inner diameter of the vibrating cylinder (10). A return spring (12) is provided between the lower end face of the stop ring (17) and the inner bottom wall of the vibrating cylinder (10). The two ends of the return spring (12) abut against the stop ring (17) and the inner bottom wall of the vibrating cylinder (10) respectively.

9. A detachable vibration clamping sleeve device for sheet pile driving according to claim 7, characterized in that, The vibrating cylinder (10) has a vent hole (11) on its lower surface, and the stop block (15) has a through hole for the vibrating rod (16) to pass through freely. The diameter of the through hole is larger than the outer diameter of the vibrating rod (16) and is used to exhaust air when the piston (14) moves down to reduce resistance.

10. A construction method based on the detachable vibration clamping sleeve device for steel sheet pile driving as described in claim 1, characterized in that, Includes the following steps: S1, hoist the sheet pile to the construction position and install the clamping sleeve assembly at the bottom of the sheet pile; S2, adjust the position of the three V-shaped clamping sleeves so that they correspond to the middle surface and two sides of the sheet pile respectively, while ensuring that the long clamping arm faces the outside of the groove of the sheet pile or the preset disengagement direction. S3 puts the elastic release mechanism in a pre-tightened state, so that the clamping sleeve can stably clamp the bottom of the steel sheet pile; S4, connect the air pump to the pneumatic vibration unit, start the air pump, and the pneumatic vibration unit will generate vibration by inflating and deflating air; S5, under the combined action of external pressing force, pile self-weight or other pile driving equipment, the steel sheet pile gradually sinks into the soil layer with the assistance of bottom vibration; S6. Once the sheet pile has sunk to the designed depth, the pneumatic vibration unit will stop operating. S7, slightly lift the sheet pile, so that the clamping sleeve can be released from the bottom of the sheet pile in a predetermined direction under the action of the elastic release mechanism; S8, the clamping sleeve is released from the bottom of the sheet pile under the action of the elastic release mechanism; S9, by retrieving the clamping sleeve assembly through the recycling connector, completes one construction cycle.

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