Vibration compensation device and method for piling equipment

Abstract

The vibration compensation device mainly comprises a winch, the winch is installed on a platform of the piling equipment, fixed pulleys are installed on the platform, the bottom end of a vibration hammer and a steel pile, and a steel wire rope at the position of the winch bypasses the fixed pulleys and is connected with the steel pile. According to the vibration compensation device and method for the piling equipment, pile end bouncing caused by counter-force bouncing of the steel pile can be avoided, and therefore the piling precision and the construction safety are improved.

Description

Technical Field

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

[0002] In foundation treatment projects, sand pile drivers are commonly used for piling. However, when driving piles in areas with complex geology, especially during initial pile driving, the pile head may not penetrate deep enough and may hit hard layers or rocks. This can cause the entire steel pile to bounce back due to the reaction force, causing the pile end (the end entering the soil) to bounce irregularly up and down and left and right. This can lead to inaccurate positioning and, in severe cases, the pile position may shift by 30 to 50 cm. This can severely reduce the accuracy of the pile position and easily cause the pile to tilt or break, impacting project quality and 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 vibrating hammer of the sand pile driver or other pile driving equipment, thereby avoiding the pile end bouncing caused by the rebound of the reaction force, thereby improving the pile driving accuracy and construction safety.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: A vibration compensation device for pile driving equipment includes a winch installed on the platform of the pile driving equipment. Fixed pulleys are installed on the platform, the bottom end of the vibrating hammer and the steel piles. The steel wire rope at the winch passes through multiple sets of fixed pulleys and is connected to the steel piles.

[0005] The fixed pulleys include a first fixed pulley, a second fixed pulley and a third fixed pulley. The first fixed pulleys are arranged on the platform in multiple groups and are spaced apart along the length direction of the platform. The second fixed pulley is installed at the bottom end of the vibrating hammer; the third fixed pulley is installed on the steel pile and is located below the second fixed pulley.

[0006] The first fixed pulley, the second fixed pulley and the third fixed pulley at the head section of the pile driving equipment are all symmetrically distributed left and right, and the first fixed pulley at the head section is located directly below the second fixed pulley.

[0007] The steel pile is provided with a through hole extending transversely at the position of the third fixed pulley.

[0008] The steel wire rope passes through one side of the vibrating hammer and the steel pile and the other side of the vibrating hammer and the steel pile and is then fixed on a fixing locking piece of the platform.

[0009] The axes of the first fixed pulley and the second fixed pulley 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 steel wire rope passes through multiple first fixed pulleys, second fixed pulleys, the first fixed pulley at the head section and then around the third fixed pulley on one side of the platform; then it crosses the steel piles and passes through the third fixed pulley on the other side of the platform, the first fixed pulley at the head section and the second fixed pulley before being fixed.

[0011] During the process of driving the steel pile downward, the wire rope is in a continuously taut state and applies an upward pulling force to the steel pile; when the steel pile is pulled out, the wire rope is in a relaxed state and releases the pulling force on the steel pile.

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

[0013] Step 2: Pile driving process: When the pile driver is driving the pile, the winch rotates forward to tighten the wire rope, and a continuous downward pulling force is applied to the steel pile through the wire rope and the fixed pulley; the vibratory hammer is started, and the pulling force and the hammering force work together to accelerate 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 upward due to the reaction force, the winch continues to maintain the pulling force to ensure that the steel pile still has downward restraining force when it bounces up due to the reaction force; Step 4: After the pile is driven to the specified depth, the winch is reversed to loosen the rope, the vibratory hammer stops working, and the steel pile is slowly pulled out.

[0014] The third fixed pulley is arranged on the upper part of the steel pile.

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

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

[0017] 3) Enhanced construction safety: The stable stress state of steel piles can reduce the mechanical loss caused by excessive vibration amplitude of the equipment and improve the safety and reliability of the sand pile machine operation.

[0018] 4) Strong adaptability: The number and arrangement of fixed pulleys can be flexibly adjusted according to actual geological conditions and pile types to meet the needs of different construction scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

[0024] In the figure: winch 1, platform 2, fixed pulley 3, wire rope 4, vibrating hammer 5, steel pile 6, fixed locking member 7, first fixed pulley 3.1, second fixed pulley 3.2, third fixed pulley 3.3. DETAILED DESCRIPTION like Figure 1-4 As shown, a vibration compensation device for pile driving equipment includes: A 33kw winch 1 is placed on a platform 2 at the rear of the piling equipment.

[0025] The number of fixed pulleys 3 can be flexibly adjusted according to actual conditions. The fixed pulleys 3 are used to guide the steel 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 the winch 1 and the steel pile 6 through multiple sets of fixed pulleys 3.

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

[0028] Here, the first fixed pulleys 3.1 are distributed on both sides. The first fixed pulleys 3.1 on the left are arranged at intervals from the tail of the platform 2 to the head section of the pile driving equipment, and the first fixed pulleys 3.1 on the right are arranged at the head section.

[0029] The second fixed pulleys 3.2 are symmetrically distributed below the vibrating hammer 5.

[0030] The third fixed pulleys 3.3 are symmetrically distributed on the left and right sides of the steel pile 6, and the steel pile 6 has a hole there, which facilitates the steel wire rope 4 to pass through the steel pile 6 from the third fixed pulley 3.3 on one side and then around the third fixed pulley 3.3 on the other side.

[0031] After being led out from the winch 1, the wire rope 4 first passes through the multiple sets of first fixed pulleys 3.1 on the left side to reach the head section, then goes up around the second fixed pulley 3.2 on the left side of the vibrating hammer 5, goes down around the first fixed pulley 3.1 on the left side of the head section, goes up around the third fixed pulley 3.3 on the left side of the steel pile 6, passes through the hole of 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 down around the first fixed pulley 3.1 on the right side of the head section, goes up around the second fixed pulley 3.2 on the right side of the vibrating hammer 5, and is finally fixed to the platform 2 by the fixing locking member 7.

[0032] When the pile driver drives a pile, winch 1 activates, applying a continuous downward pull to the pile via wire rope 4 and a fixed pulley. During the effective downward impact of the vibratory hammer 5, the pulling force and the hammering force work together to accelerate the pile's penetration into the soil. During the vibratory hammer's rest period (when the pile is no longer hammering), if the pile 6 encounters a hard soil layer and rebounds due to a reaction force, winch 1, through the tension of wire rope 4, continuously provides a downward restraining force, partially offsetting the reaction force and preventing the pile 6 from rebounding significantly, thus ensuring the stability of the pile end. When the pile 6 is driven to the specified depth, the winch reverses to relieve the force, slackening the wire rope and facilitating the upward extraction of the pile, completing a single piling cycle.

[0033] A piling equipment vibration compensation construction method comprises the following steps: 1. Preparation before construction ① According to the model of the pile sander and the specifications of the steel pile, determine the number of fixed pulleys (9 fixed pulleys are used in this embodiment) and their layout, including the positions of the first fixed pulley on the platform, the second fixed pulley under the vibrating hammer, and the third fixed pulley welded to the steel pile.

[0034] What are the advantages of the positional relationship of the fixed pulley 3? The first fixed pulley 3.1 of the head section is opposite to the second fixed pulley 3.2 below the vibrating hammer 5, and the third fixed pulley 3.3 at the steel pile 6 is arranged below the vibrating hammer 5. This arrangement is convenient for the routing of the wire rope, and at the same time, during the vertical up and down movement of the steel pile 6 and the vibrating hammer 5, it can ensure that there is always a vertical downward pulling force on the steel pile 6.

[0035] The first fixed pulley 3.1 of the head section, the second fixed pulley 3.2 under the vibrating hammer 5 and the third fixed pulley 3.3 at the steel pile 6 are arranged symmetrically on the left and right, so that the wire rope can pass through the steel pile 6 on the left and right, so that the steel pile 6 is subjected to force on both sides, the force is evenly applied, and the balance is maintained; at the same time, it also avoids the use of two winches 1, reducing costs.

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

[0037] 2. Device installation ①Fix the winch: Install the winch securely on the rear platform of the sand pile machine, connect the power supply and debug it.

[0038] ② Fixed pulley arrangement: 2-3 fixed pulleys are installed 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 under the vibratory hammer to ensure that the wire rope can be vertically turned to the steel pile guard arm; ④ Symmetrically weld 2-3 fixed pulleys on the steel pile guard arm and the pile body to form a fulcrum for wire rope transmission.

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

[0040] 3. Pile construction ① Initial state: The winch is in the loose rope state and the steel pile is positioned to the designed pile position.

[0041] ②Pile driving process: Start the vibratory hammer, and at the same time, the winch rotates forward to tighten the wire rope, exerting downward force on the steel pile; ③ When the steel pile hits a hard layer or stone, causing the entire steel pile to be bounced up by the reaction force and move upward, the winch continues to maintain the pulling force to ensure that the steel pile still has downward restraining force when it is bounced up by the reaction force; ④ After the pile is driven to the specified depth, the winch is reversed to loosen the rope, the vibratory hammer stops working, and the steel pile is slowly pulled out.

[0042] 4. Circular operation: Repeat the above steps to complete the subsequent piling tasks.

[0043] 5. Quality Control ① Regularly check the wear of the wire rope and the firmness of the fixed pulley welding nodes 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 too small tension causing insufficient compensation effect.

Claims

1. A vibration compensation device for piling equipment, characterized by: The invention comprises a winch (1), which is installed on a platform (2) of a pile driving device. Fixed pulleys (3) are installed on the platform (2), the bottom end of a vibrating hammer (5) and a steel pile (6). A steel wire rope (4) at the winch (1) passes through multiple groups of fixed pulleys (3) and is connected to the steel pile (6).

2. A piling equipment vibration compensation device according to claim 1, characterized in that: The fixed pulley (3) comprises a first fixed pulley (3.1), a second fixed pulley (3.2) and a third fixed pulley (3.3). The first fixed pulleys (3.1) are arranged in multiple groups on the platform (2) and are spaced apart along the length direction of the platform (2). The second fixed pulley (3.2) is installed at the bottom end of the vibrating hammer (5); and the third fixed pulley (3.3) is installed on the steel pile (6) and is located below the second fixed pulley (3.2).

3. A piling equipment vibration compensation device according to claim 2, characterized in that: 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 all symmetrically distributed left and right, and the first fixed pulley (3.1) at the head section is located directly below the second fixed pulley (3.2).

4. A piling equipment vibration compensation device according to claim 3, characterized in that: The steel pile (6) is provided with a through hole extending transversely therethrough at the position of the third fixed pulley (3.3).

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

6. A piling equipment vibration compensation device according to claim 5, 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.

7. A piling equipment vibration compensation device according to claim 6, characterized in that: The steel wire rope (4) passes through a plurality of first fixed pulleys (3.1), a second fixed pulley (3.2), a first fixed pulley (3.1) at the head section on one side of the platform (2), and then passes around a third fixed pulley (3.3); then crosses the steel pile (6), passes through the third fixed pulley (3.3) on the other side of the platform (2), the first fixed pulley (3.1) at the head section, and the second fixed pulley (3.2) on the other side of the platform (2), and is then fixed.

8. A piling method using a piling equipment vibration compensation device according to claim 7, characterized in that: During the process of driving the steel pile (6) downward, the steel wire rope (4) is in a continuously taut state and applies an upward pulling force to the steel pile (6); when the steel pile (6) is pulled out, the steel wire rope (4) is in a relaxed state and releases the pulling force on the steel pile (6).

9. A method for piling using a vibration compensation device for piling equipment according to claim 8, comprising the following steps: Step 1: In the initial state, the winch (1) is in a loose rope state, and the steel pile (6) is positioned to the designed pile position; Step 2, piling process: When the pile driver 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 vibrating hammer is started, and the pulling force and the hammering force work together to accelerate the steel pile (6) into the soil; Step 3: When the steel pile (6) hits a hard layer or stone, causing the entire steel pile (6) to be bounced up by the reaction force and move upward, the winch (1) continues to maintain the pulling force to ensure that the steel pile (6) still has a downward restraining force when it is bounced up by the reaction force; Step 4: After the pile is driven to the specified depth, the winch (1) is reversed to loosen the rope, the vibratory hammer stops working, and the steel pile (6) is slowly pulled out.

10. A piling method using a piling equipment vibration compensation device according to claim 9, characterized in that: The third fixed pulley (3.3) is arranged at an upper position of the steel pile (6).

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