A vibration compensation device and method for pile driving equipment

Abstract

A vibration compensation device and method for pile driving equipment mainly includes a winch installed on a platform of the pile driving equipment. Fixed pulleys are installed on the platform, the bottom of the vibratory hammer, and the steel pile. A wire rope from the winch passes over multiple sets of fixed pulleys and is connected to the steel pile. This invention provides a vibration compensation device and method for pile driving equipment that can prevent pile tip jumping caused by the reaction force of the steel pile, thereby improving pile driving accuracy and construction safety.

Description

Technical Field

[0001] This invention relates to the field of piling equipment, and in particular to a vibration compensation device and method for piling equipment. Background Technology

[0002] In foundation treatment engineering, sand pile machines are commonly used piling equipment. However, when sand pile machines are driving piles downwards, if they encounter areas with complex geological conditions, especially during the initial piling, the pile head may not be driven deep enough, and the pile head may easily hit hard layers or rocks. This causes the entire steel pile to bounce back due to the reaction force, resulting in irregular up-down and left-right jumping of the pile tip (the end that enters the soil). This jumping can lead to inaccurate positioning, and in severe cases, it may cause the construction pile position to deviate by 30 cm to 50 cm, seriously reducing the accuracy of the construction pile position and easily causing problems such as sand pile tilting or breakage, affecting the project quality and construction efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a vibration compensation device for pile driving equipment, which continuously provides a stable downward force to the steel pile during the interval of the downward hammering of the vibratory hammer of the sand pile machine or other pile driving equipment, so as to avoid the pile end jumping caused by the reaction force of the steel pile, thereby improving the pile driving accuracy and construction safety.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A vibration compensation device for piling equipment includes a winch, which is installed on the platform of the piling equipment. Fixed pulleys are installed on the platform, the bottom of the vibratory hammer, and the steel pile. The wire rope at the winch passes around multiple sets of fixed pulleys and is connected to the steel pile.

[0005] The fixed pulley includes a first fixed pulley, a second fixed pulley and a third fixed pulley. The first fixed pulley is arranged in multiple groups on the platform and spaced apart along the length of the platform. The second fixed pulley is installed at the bottom of the vibratory hammer. The third fixed pulley is installed on the steel pile and located below the second fixed pulley.

[0006] The first, second, and third fixed pulleys at the head section of the piling equipment are symmetrically distributed from left to right, with the first fixed pulley at the head section located directly below the second fixed pulley.

[0007] The steel pile has a through hole that extends laterally at the location of the third fixed pulley.

[0008] The wire rope passes from one side of the vibratory hammer and the steel pile, around the other side of the vibratory hammer and the steel pile, and is then fixed to the platform's fixing and locking components.

[0009] The axes of the first and second fixed pulleys are parallel, and the axis of the third fixed pulley is perpendicular to the axis of the second fixed pulley on the projection plane.

[0010] The wire rope passes through multiple first fixed pulleys, second fixed pulleys, and first fixed pulleys at the machine head section on one side of the platform, then around a third fixed pulley; after crossing the steel pile, it passes through the third fixed pulley, first fixed pulley at the machine head section, and second fixed pulley on the other side of the platform before being fixed.

[0011] During the driving of the steel pile, the wire rope is kept taut and exerts an upward pulling force on the steel pile; when the steel pile is pulled out, the wire rope is slack and releases the pulling force on the steel pile.

[0012] A method for pile driving using a vibration compensation device for pile driving equipment includes the following steps: Step 1: In the initial state, the winch is in the slack rope state, and the steel pile is positioned at the designed pile position.

[0013] Step 2, Piling Process: When the sand pile driver is driving the pile, the winch rotates forward to tighten the wire rope, and applies a continuous downward pulling force to the steel pile through the wire rope and the fixed pulley; the vibratory hammer is started, and the combined effect of the pulling force and the hammering force accelerates the steel pile into the soil; Step 3: When the steel pile hits a hard layer or rock, causing the entire steel pile to bounce up due to the reaction force, the winch continues to maintain tension to ensure that the steel pile still has a downward restraining force when it bounces up due to the reaction force. Step 4: After driving the pile to the designated depth, the winch reverses to loosen the rope, the vibratory hammer stops working, and the steel pile is slowly pulled out.

[0014] The third fixed pulley is located at the top of the steel pile.

[0015] This invention provides a vibration compensation device and method for pile driving equipment, which has the following technical effects: 1) Compensation for the intermittent period of the vibratory hammer: Through the linkage of the winch, fixed pulley and wire rope, a downward pulling force is continuously provided when the vibratory hammer does not apply hammering force, to compensate for the problem of unstable force on the steel pile caused by power interruption.

[0016] 2) Improve construction accuracy: reduce pile tip bounce caused by reaction force, effectively control pile position deviation, and reduce the risk of sand pile tilting or breakage.

[0017] 3) Enhanced construction safety: A stable stress state of steel piles can reduce mechanical losses caused by excessive equipment vibration, thereby improving the safety and reliability of sand pile machine operation.

[0018] 4) High adaptability: The number and arrangement of fixed pulleys can be flexibly adjusted according to actual geological conditions and pile type to meet the needs of different construction scenarios. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1This is a schematic diagram of the operation of the present invention (vibratory hammer at the lower limit position).

[0020] Figure 2 This is a schematic diagram of the operation of the present invention (vibratory hammer at the upper limit position).

[0021] Figure 3 This is a partial schematic diagram (front view) of the present invention.

[0022] Figure 4 This is a partial schematic diagram (rear view) of the present invention.

[0023] Figure 5 This is a partial schematic diagram of the present invention (left view).

[0024] In the diagram: 1. Winch; 2. Platform; 3. Fixed pulley; 4. Wire rope; 5. Vibratory hammer; 6. Steel pile; 7. Fixing and locking parts; 3.1. First fixed pulley; 3.2. Second fixed pulley; 3.3. Detailed Implementation like Figure 1-4 As shown, a vibration compensation device for pile driving equipment includes: A 33kW winch 1 is placed on platform 2 at the rear of the piling equipment.

[0025] The number of fixed pulleys 3 can be flexibly adjusted according to the actual situation. The fixed pulleys 3 are used to guide the wire rope 4 to the head section of the piling equipment and the position of the steel pile.

[0026] A steel wire rope 4 with a diameter of 1 cm is connected to a winch 1 and a steel pile 6 via multiple sets of fixed pulleys 3.

[0027] Preferably, the fixed pulley 3 includes a first fixed pulley 3.1 installed on the platform 2 of the piling equipment, a second fixed pulley 3.2 welded below the vibratory hammer 5, and a third fixed pulley 3.3 welded to the steel pile 6. The steel wire rope passes through the above-mentioned multiple fixed pulleys 3 in sequence to form a tension transmission path to the steel pile 6.

[0028] The first fixed pulley 3.1 is distributed on both the left and right sides. The first fixed pulley 3.1 on the left is arranged at intervals from the tail of the platform 2 towards the head section of the pile driving equipment, while the first fixed pulley 3.1 on the right is set in the head section.

[0029] The second fixed pulley 3.2 is symmetrically distributed on the left and right sides below the vibratory hammer 5.

[0030] The third fixed pulley 3.3 is symmetrically distributed on the left and right sides of the steel pile 6, and the steel pile 6 has a hole at this point, so that the wire rope 4 can pass through the third fixed pulley 3.3 on one side of the steel pile 6 laterally and then go around the third fixed pulley 3.3 on the other side.

[0031] After being drawn from the winch 1, the wire rope 4 first passes through multiple sets of first fixed pulleys 3.1 on the left side to reach the head section. Then, it goes upwards around the second fixed pulley 3.2 on the left side of the vibratory hammer 5, downwards around the first fixed pulley 3.1 on the left side of the head section, then upwards around the third fixed pulley 3.3 on the left side of the steel pile 6. It then passes through the hole in the steel pile 6 and goes around the third fixed pulley 3.3 on the right side of the steel pile 6. It then goes downwards around the first fixed pulley 3.1 on the right side of the head section, upwards around the second fixed pulley 3.2 on the right side of the vibratory hammer 5, and finally is fixed to the platform 2 by the fixing locking device 7.

[0032] When the sand pile driver is driving the pile, the winch 1 starts, applying a continuous downward pulling force to the steel pile through the wire rope 4 and the fixed pulley. During the effective period of the vibratory hammer 5's downward hammering, the pulling force and the hammering force work together to accelerate the steel pile's penetration into the soil. When the vibratory hammer enters the intermittent period (at which time the steel pile has no hammering force), if the steel pile 6 encounters a hard soil layer causing it to bounce up due to the reaction force, the winch 1 continuously provides a downward restraining force through the pulling force of the wire rope 4, offsetting part of the reaction force and preventing the steel pile 6 from bouncing up significantly, thus ensuring the stability of the pile end. When the steel pile 6 is driven to the designated depth, the winch reverses to release the force, the wire rope loosens, and the steel pile is easily pulled out upwards, completing a single pile driving cycle.

[0033] A vibration compensation construction method for pile driving equipment includes the following steps: 1. Pre-construction preparation ① Determine the number of fixed pulleys (9 fixed pulleys are used in this embodiment) and their arrangement according to the model of the sand pile machine and the specifications of the steel pile, including the positions of the first fixed pulley on the platform, the second fixed pulley under the vibratory hammer and the third fixed pulley welded on the steel pile.

[0034] What are the advantages of the positional arrangement of the fixed pulleys 3? The first fixed pulley 3.1 of the machine head section is directly opposite the second fixed pulley 3.2 below the vibratory hammer 5, and the third fixed pulley 3.3 at the steel pile 6 is arranged below the vibratory hammer 5. This arrangement not only facilitates the routing of the wire rope, but also ensures that there is always a vertical downward tension on the steel pile 6 during the vertical movement of the steel pile 6 and the vibratory hammer 5.

[0035] The first fixed pulley 3.1 at the head section, the second fixed pulley 3.2 below the vibratory hammer 5, and the third fixed pulley 3.3 at the steel pile 6 are arranged symmetrically on the left and right sides, which allows the wire rope to pass through the steel pile 6 on both sides. This ensures that the steel pile 6 is subjected to force on both sides, and the force is uniform and balanced. At the same time, it avoids the use of two winches 1, reducing costs.

[0036] ② Check the power of the winch (a 33kW winch is used in this embodiment), the diameter of the wire rope (1cm), and the load-bearing capacity of each fixed pulley to ensure that they meet the design requirements.

[0037] 2. Device Installation ① Winch fixing: Securely install the winch on the tail platform of the sand pile machine, connect the power supply and test its operation.

[0038] ② Fixed pulley arrangement: Install 2-3 fixed pulleys on the edge of the sand pile machine platform to guide the wire rope from the winch to the machine head; ③ Weld 1-2 fixed pulleys below the vibratory hammer to ensure that the wire rope can be turned vertically to the steel pile arm; ④ Weld 2-3 fixed pulleys symmetrically onto the steel pile sheath and pile body to form the wire rope transmission fulcrum.

[0039] ⑤ Wire rope winding: The wire rope is led out from the winch and passes through the platform fixed pulley, the fixed pulley under the vibratory hammer, the fixed pulley of the steel pile guard arm and the moving pulley of the pile body (if necessary), and finally symmetrically connected to the fixed pulley on the other side of the steel pile to form a closed loop.

[0040] 3. Piling construction ① Initial state: The winch is in the slack rope state, and the steel pile is positioned at the designed pile position.

[0041] ② Piling process: Start the vibratory hammer, and at the same time, the winch rotates forward to tighten the wire rope, applying downward pulling force to the steel pile; ③ When the steel pile hits a hard layer or rock, causing the entire steel pile to bounce up due to the reaction force, the winch continues to maintain tension to ensure that the steel pile still has a downward restraining force when it bounces up due to the reaction force. ④ After driving the pile to the designated depth, the winch reverses to loosen the rope, the vibratory hammer stops working, and the steel pile is slowly pulled out.

[0042] 4. Cyclic operation: Repeat the above steps to complete the subsequent pile driving task.

[0043] 5. Quality Control ① Regularly inspect the wear of the wire rope and the firmness of the welded joints of the fixed pulley to ensure the safety and reliability of the transmission system; ② Adjust the winch tension parameters according to the geological hardness to avoid excessive tension causing deformation of the steel pile or insufficient tension causing inadequate compensation.

Claims

1. A vibration compensation device for pile driving equipment, characterized in that: Includes a winch (1), which is installed on the platform (2) of the piling equipment. Fixed pulleys (3) are installed on the platform (2), the bottom of the vibratory hammer (5) and the steel pile (6). The wire rope (4) at the winch (1) passes around multiple sets of fixed pulleys (3) and is connected to the steel pile (6). The fixed pulley (3) includes a first fixed pulley (3.1), a second fixed pulley (3.2) and a third fixed pulley (3.3). The first fixed pulley (3.1) is arranged in multiple groups on the platform (2) and spaced apart along the length of the platform (2). The second fixed pulley (3.2) is installed at the bottom of the vibratory hammer (5). The third fixed pulley (3.3) is installed on the steel pile (6) and located below the second fixed pulley (3.2). The first fixed pulley (3.1), the second fixed pulley (3.2), and the third fixed pulley (3.3) at the head section of the pile driving equipment are symmetrically distributed from left to right, and the first fixed pulley (3.1) at the head section is located directly below the second fixed pulley (3.2); The wire rope (4) passes through multiple first fixed pulleys (3.1), second fixed pulleys (3.2), and first fixed pulleys (3.1) at the machine head section on one side of the platform (2) before passing over a third fixed pulley (3.3); then it crosses the steel pile (6) and passes through the third fixed pulley (3.3), first fixed pulleys (3.1), and second fixed pulleys (3.2) at the machine head section on the other side of the platform (2) before being fixed.

2. The vibration compensation device for pile driving equipment according to claim 1, characterized in that: The steel pile (6) has a through hole in the transverse direction at the third fixed pulley (3.3).

3. The vibration compensation device for pile driving equipment according to claim 2, characterized in that: The wire rope (4) passes from one side of the vibratory hammer (5) and the steel pile (6) around the other side of the vibratory hammer (5) and the steel pile (6) and is then fixed to the fixing locking member (7) of the platform (2).

4. The vibration compensation device for pile driving equipment according to claim 3, characterized in that: The axes of the first fixed pulley (3.1) and the second fixed pulley (3.2) are parallel, and the axis of the third fixed pulley (3.3) is perpendicular to the axis of the second fixed pulley (3.2) on the projection plane.

5. The method for pile driving using a vibration compensation device for pile driving equipment according to claim 4, characterized in that: During the driving of the steel pile (6), the wire rope (4) is in a state of continuous tension and applies downward tension to the steel pile (6); when the steel pile (6) is pulled out, the wire rope (4) is in a state of relaxation and releases tension to the steel pile (6).

6. A method for pile driving using a vibration compensation device for pile driving equipment according to claim 5, comprising the following steps: Step 1: In the initial state, the winch (1) is in a slack rope state, and the steel pile (6) is positioned at the designed pile position; Step 2, Piling process: When the sand pile machine is driving the pile, the winch (1) rotates forward to tighten the wire rope (4), and applies a continuous downward pulling force to the steel pile (6) through the wire rope (4) and the fixed pulley (3); the vibratory hammer is started, and the steel pile (6) is accelerated into the soil by the combined action of the pulling force and the hammering force. Step 3: When the steel pile (6) hits a hard layer or rock, causing the entire steel pile (6) to bounce up due to the reaction force, the winch (1) continues to maintain the tension to ensure that the steel pile (6) still has a downward constraint force when it bounces up due to the reaction force. Step 4: After driving the pile to the specified depth, the winch (1) reverses to loosen the rope, the vibratory hammer stops working, and the steel pile (6) is slowly pulled out.

7. A method for pile driving using a vibration compensation device for pile driving equipment according to claim 6, characterized in that: The third fixed pulley (3.3) is located on the upper part of the steel pile (6).

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