Bridge double-wall cofferdam rapid sinking system and construction method

Abstract

The application provides a bridge double-wall cofferdam rapid sinking system and a construction method, which comprises a vibration sinking system and an auxiliary sinking system. Multiple clamps are arranged below the vibration sinking system, and the multiple clamps are used for clamping the top of the double-wall cofferdam. The auxiliary sinking system comprises a soil removal system, a water jetting system and a gas and water supply system. The soil removal system comprises multiple air suction dredgers. The pipe body of the air suction dredger is arranged inside the interlayer of the double-wall cofferdam, and the lower end of the pipe body is close to the bottom of the cofferdam blade foot of the double-wall cofferdam. The gas and water supply system is communicated with the water jetting system. The gas supply branch pipe of the gas and water supply system is communicated with the lower end of the pipe body of the air suction dredger. The water jetting system comprises multiple water jetting nozzles. The water jetting nozzles are arranged on both sides of the lower end of the pipe body of the air suction dredger, and the water jetting nozzles are communicated with the gas and water supply system. The vibration sinking sinking method is combined with the soil removal sinking method and the water jetting resistance reduction method. The significant soil squeezing effect caused by the vibration sinking of the double-wall cofferdam is eliminated, and the sinking resistance of the cofferdam is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge foundation construction, in particular to a bridge double-wall cofferdam rapid sinking system and construction method. BACKGROUND

[0002] In the field of bridge construction, when the bridge foundation, pier and other parts are below the ground water level, a cofferdam is often used as a temporary maintenance structure to prevent water and soil from entering the construction site of the pier, and the cofferdam is removed after the bridge foundation and pier are built above the water level. After the cofferdam is submerged and bedded, a submersible pump or an air suction dredger and other equipment are used to remove soil inside the cofferdam, so that the cofferdam overcomes its own gravity and buoyancy and sinks to the designed elevation, and then the base is cleaned and sealed, and finally the water is drained to form a dry working environment. However, this cofferdam soil removal sinking method has a long construction period, sometimes even several weeks, and when the construction site is located in a strong tidal river section, the soil around the cofferdam is easy to form a large pit, causing safety risks such as partial emptying and tilting of the cofferdam. In order to quickly and safely sink the cofferdam, large-scale vibration systems have been applied to cofferdam sinking construction in the industry, which can shorten the cofferdam sinking time to a few hours, but this vibration sinking construction is mainly used for single-wall cofferdams and cannot be applied to double-wall cofferdams with thicker walls. Therefore, a bridge double-wall cofferdam rapid sinking system and construction method are proposed, which simultaneously performs soil removal and water jetting construction at the end of the cofferdam blade during vibration sinking construction, reduces the end resistance and side resistance of the cofferdam, and realizes the rapid sinking of the double-wall cofferdam. SUMMARY

[0003] The main purpose of the present application is to provide a bridge double-wall cofferdam rapid sinking system and construction method, which solves the problem that large-scale vibration systems are applied to cofferdam sinking construction, which can shorten the cofferdam sinking time to a few hours, but this vibration sinking construction is mainly used for single-wall cofferdams and cannot be applied to double-wall cofferdams with thicker walls.

[0004] To solve the above technical problems, the technical scheme adopted by the present application is: a bridge double-wall cofferdam rapid sinking system, comprising a vibration sinking system and an auxiliary sinking system, a plurality of clamps are arranged below the vibration sinking system, the clamps are used to clamp the top of the double-wall cofferdam, the auxiliary sinking system comprises a soil removal system, a water jetting system and a gas and water supply system;

[0005] The soil removal system comprises a plurality of air suction dredgers, the pipe body of the air suction dredger is arranged inside the interlayer of the double-wall cofferdam, and the lower end of the pipe body is close to the bottom of the cofferdam blade of the double-wall cofferdam;

[0006] The gas and water supply system is in communication with the water jetting system, the gas supply branch pipe of the gas and water supply system is in communication with the lower end of the pipe body of the air suction dredger, the water jetting system comprises a plurality of water jetting nozzles, the water jetting nozzles are arranged on both sides of the lower end of the pipe body of the air suction dredger, and the water jetting nozzles are in communication with the gas and water supply system.

[0007] In a preferred embodiment, the sinking system comprises a plurality of eccentric vibrating hammers connected in parallel, the vibrating hammers are arranged on the vibrating beam, and a plurality of clamps are arranged below the vibrating beam.

[0008] In a preferred embodiment, the clamp comprises two oppositely arranged movable chucks and fixed chucks, the movable chuck is in sliding connection with the clamp body, the clamp is provided with a hydraulic cylinder, the telescopic end of the hydraulic cylinder is connected with the movable chuck, and the other end of the cylinder body is connected with the clamp body.

[0009] The inner surfaces of the movable chuck and the fixed chuck are provided with sawtooth-shaped protrusions.

[0010] In a preferred embodiment, the water jetting system further comprises a water supply main pipe arranged annularly on the top of the double-wall cofferdam or below the vibrating beam, the water supply main pipe is connected with the water jetting nozzles through a plurality of water supply branch pipes, and the water jetting nozzles spray high-pressure water downward along the tangent direction of the cofferdam.

[0011] In a preferred embodiment, a water supply control valve group is arranged between the water jetting nozzles and the water supply main pipe.

[0012] In a preferred embodiment, the bottom of the cofferdam blade of the double-wall cofferdam is provided with a suction port, the lower end of the air suction dredger is connected with the suction port, and the upper end of the air suction dredger is provided with an outwardly bent mud discharge port.

[0013] In a preferred embodiment, a gas supply branch pipe parallel to the air suction dredger is further arranged, the lower end of the gas supply branch pipe is connected with the air inlet of the air suction dredger, and the mud is discharged outside the cofferdam through air-lift reverse circulation.

[0014] In a preferred embodiment, an annularly arranged gas supply main pipe is further arranged, the gas supply main pipe is connected with the gas supply branch pipes, and a gas supply control valve group is arranged between the gas supply branch pipes.

[0015] The gas supply main pipe is arranged on the top of the double-wall cofferdam or below the vibrating beam.

[0016] In a preferred embodiment, the gas supply and water supply system comprises a plurality of air compressor units connected in parallel, the plurality of air compressor units are connected with a gas storage tank through a gas supply pipeline system, and the gas storage tank is connected with the gas supply main pipe of the air suction dredger through a gas supply hose.

[0017] The gas supply and water supply system further comprises a plurality of water pump groups connected in parallel, the plurality of water pump groups are connected with a water supply hose through a water supply pipeline system, and the water supply hose is connected with the water supply main pipe of the water jetting system.

[0018] The gas supply and water supply system is arranged on the sinking system driving ship.

[0019] The method comprises:

[0020] S1, after the double-wall cofferdam is transported to the construction site, the cofferdam is hoisted into position by a floating crane and is bedded in water;

[0021] S2, the floating crane hoists the vibration sinking system and the double-wall cofferdam, and connects the pipeline of the soil taking system, the water jetting system and the gas and water supply system;

[0022] S3, the auxiliary sinking system is started to take soil and jet water at the cutting edge of the cofferdam, and the linkage hydraulic vibration hammer on the vibration sinking system is started to hammer the double-wall cofferdam into the earth to sink to the design elevation;

[0023] The operation steps of the auxiliary sinking system are as follows:

[0024] Before the bedding of the cutting edge of the double-wall cofferdam, the electrically-controlled water supply control valve group and the gas supply control valve group are controlled, the air suction dredger discharges the mud outside the cofferdam through the air lift reverse circulation of the gas supply branch pipe, the water jetting nozzle of the water supply branch pipe sprays high-pressure water downward along the tangent direction of the cofferdam to reduce the sinking resistance of the cofferdam, realizes the rapid auxiliary sinking of the cofferdam, and realizes the active control of the sinking posture of the cofferdam through the opening of the zones.

[0025] Or the suction port of the bottom of the air suction dredger is blocked, and the blocking is removed before the start of sinking to prevent the riverbed silt from flowing into and causing blockage during the bedding process.

[0026] The water jetting flow of the water jetting system is greater than the mud flow discharged by the air suction dredger, so as to supplement water in the wall of the cofferdam to ensure the minimum water head difference required by the air lift reverse circulation of soil taking.

[0027] S4, the vibration sinking system and the auxiliary sinking system are closed, the pipeline connection of the soil taking system, the water jetting system and the gas and water supply system is disconnected, and the connection of the vibration sinking system and the double-wall cofferdam is released.

[0028] The application provides a bridge double-wall cofferdam rapid sinking system and a construction method, which combines the vibration sinking sinking method with the soil taking sinking method and the water jetting resistance reduction method, eliminates the significant soil squeezing effect generated by the vibration sinking of the double-wall cofferdam, reduces the sinking resistance of the cofferdam, and realizes the rapid sinking of the double-wall cofferdam. In addition, during the sinking process of the cofferdam, the sinking auxiliary system can be controlled by the control valve group, the sinking posture of the cofferdam can be dynamically adjusted and actively controlled, and the safe and controllable sinking of the double-wall cofferdam is realized. BRIEF DESCRIPTION OF DRAWINGS

[0029] The application will be further described below in combination with the drawings and examples:

[0030] Figure 1 is the front view of the bridge double-wall cofferdam rapid sinking system of the application;

[0031] Figure 2 is the front view of the vibration sinking system of the bridge double-wall cofferdam rapid sinking system of the application;

[0032] Figure 3 is the internal arrangement structure diagram of the bridge clamp.

[0033] Figure 4 This is a front view of the auxiliary sinking system of the bridge double-wall cofferdam rapid sinking system of the present invention;

[0034] Figure 5 This is a plan view of the soil sampling and water jetting system of the auxiliary sinking system of the present invention;

[0035] Figure 6 This is a partially enlarged structural diagram of the soil sampling and water jetting system of the auxiliary sinking system of this invention;

[0036] Figure 7 This is an elevation view of the soil sampling and water jetting system of the auxiliary sinking system of this invention;

[0037] Figure 8 This is an enlarged schematic diagram of the soil sampling and water jetting system layout and installation of the auxiliary sinking system of the present invention;

[0038] Figure 9 This is a plan view of the air and water supply system of the auxiliary sinking system of the present invention.

[0039] In the diagram: 1. Vibratory sinking system; 2. Auxiliary sinking system; 3. Sinking system drive hull; 4. Vibratory hammer system; 5. Vibratory beam; 6. Clamp; 601. Movable clamp; 602. Fixed clamp; 603. Hydraulic cylinder; 7. Double-walled cofferdam; 8. Soil extraction system; 9. Water jetting system; 10. Air and water supply system; 11. Main air supply pipe; 12. Main water supply pipe; 13. Water supply branch pipe; 14. Water jetting nozzle; 15. Air suction sludge machine; 16. Air supply branch pipe; 17. Water supply control valve assembly; 18. Sludge discharge port; 19. Air inlet; 20. Sludge suction port; 21. Cofferdam cutting edge; 22. Air supply control valve assembly; 23. Water supply hose; 24. Water supply pipeline system; 25. Water pump assembly; 26. Air supply hose; 27. Air storage tank; 28. Air supply pipeline system; 29. ​​Air compressor unit. Detailed Implementation

[0040] Example 1

[0041] like Figures 1-9 As shown, a rapid sinking system for a double-walled cofferdam of a bridge includes a vibratory sinking system 1 and an auxiliary sinking system 2. Multiple clamps 6 are provided below the vibratory sinking system 1 for clamping the top of the double-walled cofferdam 7. The auxiliary sinking system 2 includes a soil extraction system 8, a water jetting system 9, and an air and water supply system 10.

[0042] The soil extraction system 8 includes multiple air suction machines 15. The pipes of the air suction machines 15 are set inside the interlayer of the double-walled cofferdam 7, and the lower end of the pipes is close to the bottom of the cutting edge 21 of the double-walled cofferdam 7.

[0043] The air and water supply system 10 is communicated with the water jetting system 9, the air supply branch pipe 16 of the air and water supply system 10 is communicated with the lower end of the pipe body of the air suction dredger 15, the water jetting system 9 comprises a plurality of water jetting nozzles 14, the water jetting nozzles 14 are arranged on both sides of the lower end of the pipe body of the air suction dredger 15, and the water jetting nozzles 14 are communicated with the air and water supply system 10.

[0044] After the cofferdam is floated to the construction site, water is injected to bed, the lifting ship is used to hoist the vibration sinking system 1 and connect the cofferdam, the linkage hydraulic vibration hammer on the vibration sinking system 1 is started, the air suction pipe and the high-pressure water jetting pipe are preset in the cofferdam wall, the soil at the end of the blade of the cofferdam is discharged in the process of vibration sinking, and the rapid sinking of the cofferdam is realized.

[0045] The double-wall cofferdam rapid sinking system mainly comprises the vibration sinking system 1, the double-wall cofferdam 7 and the auxiliary sinking system 2.

[0046] In the preferred scheme, the vibration sinking system 1 comprises a plurality of eccentric vibration hammers, the plurality of eccentric vibration hammers are connected in parallel, the vibration hammers are arranged on the vibration beam 5, and a plurality of clamps 6 are arranged below the vibration beam 5. The vibration sinking system 1 mainly comprises a vibration hammer system, the vibration beam 5 and the clamp 6. The vibration hammer system is formed by connecting a plurality of vibration hammers in parallel, the eccentric rotors of the vibration hammers are synchronous in phase in the vibration process, sufficient exciting force and amplitude are provided for the sinking of the cofferdam, the vibration hammer system is installed on the vibration beam 5, a plurality of groups of clamps 6 are arranged at the bottom of the vibration beam 5 to clamp the wall body of the double-wall cofferdam, and the arrangement and quantity of the clamps are designed according to the cross-sectional shape, size and structural strength of the cofferdam.

[0047] In the preferred scheme, the clamp 6 comprises two oppositely arranged movable clamping heads 601 and fixed clamping heads 602, the movable clamping head 601 is connected with the clamp body in sliding mode, a hydraulic cylinder 603 is arranged on the clamp 6, one end of the hydraulic cylinder 603 is connected with the movable clamping head 601, the other end of the hydraulic cylinder 603 is connected with the clamp body, and the inner surfaces of the movable clamping head 601 and the fixed clamping head 602 are provided with sawtooth-shaped protrusions. Figure 3 As shown in the structure, the inner surfaces of the clamps 6 are provided with sawtooth-shaped protrusions, and the clamps 6 are arranged in pairs to mainly clamp the upper edge position of the double-wall cofferdam 7, the clamps are clamped in the hydraulic driving mode, and the clamping effect is good.

[0048] In the preferred embodiment, the water jetting system 9 further comprises a water supply main pipe 12 arranged annularly on the top of the double-wall cofferdam 7 or below the vibrating beam 5, the water supply main pipe 12 is communicated with the water jetting nozzles 14 through a plurality of water supply branch pipes 13, and the water jetting nozzles 14 jet high-pressure water downward along the tangential direction of the cofferdam. The water jetting system 9 comprises the water jetting nozzles 14, the water supply main pipe 12, the water supply branch pipes 13 and a control valve group. The water jetting nozzles 14 are arranged near the cofferdam blade feet, jet high-pressure water downward along the tangential direction of the cofferdam, and reduce the sinking resistance of the cofferdam; the water supply main pipe 12 is arranged annularly along the top surface of the cofferdam, and can also be integrated into the structure of the vibrating beam 5 of the vibrating sinking system, and high-pressure water is introduced from the air supply water supply system to each water supply branch pipe 13; the water supply branch pipes 13 are arranged along the axial direction of the cofferdam, and introduce high-pressure water to the water jetting nozzles at the cofferdam blade feet;

[0049] In the preferred embodiment, a water supply control valve group 17 is arranged between the water jetting nozzles 14 and the water supply main pipe 12. The control valve group is arranged at the connection between the water supply main pipe 12 and the water supply branch pipes 13, controls the opening and closing of each water jetting nozzle 14, and realizes the rapid auxiliary sinking of the cofferdam by overall opening, and realizes the active control of the sinking posture of the cofferdam by partitioned opening.

[0050] In the preferred embodiment, the bottom of the cofferdam blade feet 21 of the double-wall cofferdam 7 is provided with a suction port 20, the lower end of the air suction dredger 15 is communicated with the suction port 20, and the upper end of the air suction dredger 15 is provided with a bent mud discharge port 18. A parallel air supply branch pipe 16 is further arranged, the lower end of the air supply branch pipe 16 is communicated with the air inlet 19 of the air suction dredger 15, and the mud is discharged outside the cofferdam through air-lift reverse circulation. The earth taking system 8 comprises the air suction dredger 15, the air supply main pipe 11, a control valve group and the air supply branch pipe 16. The air suction dredger 15 is installed in the double-wall cofferdam, is arranged uniformly along the axial direction of the cofferdam, the suction port at the bottom of the air suction dredger extends into the bottom of the cofferdam blade feet, the top mud discharge port 18 is provided with a bent pipe, and the mud is discharged outside the cofferdam through air-lift reverse circulation; the air supply main pipe 11 is arranged annularly along the top surface of the cofferdam, and can also be integrated into the structure of the vibrating beam 5 of the vibrating sinking system, and compressed air is introduced from the air supply water supply system to each air supply branch pipe 16; the air supply branch pipe 16 is parallel to the suction pipe, and introduces compressed air from the top surface of the cofferdam to the air inlet position of each air suction dredger.

[0051] In the preferred embodiment, an annular air supply main pipe 11 is further arranged, the air supply main pipe 11 is communicated with the air supply branch pipe 16, an air supply control valve group 22 is arranged between the air supply branch pipe 16 and the air supply branch pipe 16, and the air supply main pipe 11 is arranged on the top of the double-wall cofferdam 7 or below the vibrating beam 5. The control valve group is arranged at the connection between the air supply main pipe 11 and the air supply branch pipe 16, controls the opening and closing of each air suction dredger, realizes the rapid auxiliary sinking of the cofferdam by overall opening, and realizes the active control of the sinking posture of the cofferdam by partitioned opening.

[0052] In the preferred embodiment, the air and water supply system 10 includes multiple air compressor units 29 connected in parallel. The multiple air compressor units 29 are connected to an air storage tank 27 through an air supply pipeline system 28. The air storage tank 27 is connected to the main air supply pipe 11 of the air suction machine 15 through an air supply hose 26. The air and water supply system 10 also includes multiple water pump units 25 connected in parallel. The multiple water pump units 25 are connected to a water supply hose 23 through a water supply pipeline system 24. The water supply hose 23 is connected to the main water supply pipe 12 of the water jetting system 9. The air and water supply system 10 is installed on the hull 3 of the sinking system drive vessel.

[0053] The gas and water supply system consists of a water supply system and a gas supply system.

[0054] The air supply system comprises an air compressor unit 29, an air supply pipeline system 28, an air storage tank 27, and an air supply hose 26. The air compressor unit consists of several air compressors 29 connected in parallel to supply compressed air to the soil extraction system 8. The air supply pipeline system 28 introduces the compressed air produced by the air compressor unit 29 into the air storage tank 27. Control valve groups are installed at the connection points between the air supply pipeline system 28 and the air compressor 29 to control the number of air compressors that are turned on, i.e., the amount of compressed air supplied. The air storage tank 27 can store a certain amount of compressed air to solve the problem of insufficient air supply in a short period of time, while stabilizing the air pressure to ensure a continuous and stable supply of compressed air to the main air supply pipe. The air supply hose connects the air storage tank to the main air supply pipe at the top of the cofferdam.

[0055] The water supply system comprises a pump set 25, a water supply pipeline system 24, and a water supply hose 23. The pump set 25 consists of several high-pressure water pumps connected in parallel to supply high-pressure water to the water jetting system 9. The water supply pipeline system 24 collects the high-pressure water produced by the pump set 25 and introduces it into the water supply hose 23. A control valve group is installed at the connection between the water supply pipeline system 24 and the pump set 25 to control the number of pumps opened and the amount of high-pressure water supplied. The water supply hose 23 transports the high-pressure water produced by the water supply system to the main water supply pipe at the top of the cofferdam.

[0056] Example 2

[0057] Further explanation in conjunction with Example 1, such as Figures 1-9 As shown in the diagram, after the double-walled cofferdam 7 is transported to the construction site, it is lifted into place by a floating crane and placed into the water.

[0058] After the floating crane lifts and installs the vibratory sinking system 1 and the double-walled cofferdam 7, it connects the soil extraction system 8, the water jetting system 9, and the air and water supply system 10.

[0059] Activate the auxiliary sinking system 2 to remove soil and spray water at the cutting edge 21 of the cofferdam, and start the linkage hydraulic vibratory hammer on the vibratory sinking system 1 to hammer the double-wall cofferdam 7 into the soil and sink it to the design elevation.

[0060] The operation steps of the auxiliary sinking system 2 are as follows:

[0061] Before the bottom of the cofferdam blade foot 21 of the double-wall cofferdam 7 is bedded, the electrically-controlled water supply control valve group 17 and the air supply control valve group 22 are controlled, the air suction dredger 15 discharges the mud outside the cofferdam through air lift reverse circulation of the air supply branch pipe 16, the water jet nozzle 14 of the water supply branch pipe 13 sprays high-pressure water downward along the tangential direction of the cofferdam, the sinking resistance of the cofferdam is reduced, the rapid auxiliary sinking of the cofferdam is realized, and the sinking posture of the cofferdam is actively controlled through zoned opening.

[0062] Or the suction port 20 at the bottom of the air suction dredger 15 is blocked, and the blocking is removed before starting sinking to prevent the riverbed silt from flowing into and causing blockage during the bedding process.

[0063] The water jet flow of the water jet system 9 is preferably greater than the mud flow discharged by the air suction dredger 15, so as to supplement water in the cofferdam wall to ensure the minimum water head difference required for air lift reverse circulation of soil.

[0064] The vibration sinking system 1 and the auxiliary sinking system 2 are closed, and the pipeline connection of the soil taking system 8, the water jet system 9, and the air and water supply system 10 is disconnected, and the connection between the vibration sinking system 1 and the double-wall cofferdam 7 is released.

[0065] Preferably, the air suction dredger 15, the air supply branch pipe 16, and the water supply branch pipe 13 can be pre-installed in the cofferdam wall during the manufacturing process of the cofferdam, the on-site operation after the bedding of the cofferdam is reduced, and the construction time from the bedding to the sinking of the cofferdam is shortened. After the cofferdam is sunk to the position, the water jet pipe is used as a grouting pipe for the cofferdam bottom water stop;

[0066] Preferably, the control valve groups of the water supply and air supply main pipes and branch pipes can be integrated into the vibration beam 5 structure of the vibration sinking system. After the vibration sinking system is fixed by clamping the cofferdam, the main pipes and branch pipes are connected, and the connection between the branch pipes and the main pipes is released after the vibration sinking is in place, so as to improve the installation efficiency and turnover rate of the pipeline.

[0067] Preferably, the floating crane rated lifting capacity allows the vibration sinking system to be directly used as a lifting tool to lift the cofferdam into water for bedding, thereby reducing the process conversion.

[0068] Preferably, the control valve groups are electrically controlled. During the sinking process of the cofferdam, the soil taking system and the water jet system are zoned opened according to the real-time posture of the cofferdam, the posture of the cofferdam is adjusted, and the safe and stable sinking is ensured.

[0069] The above embodiments are only preferred technical solutions of the present application, and should not be regarded as limitations of the present application. The protection scope of the present application should be based on the technical solutions recited in the claims, including equivalent replacement solutions of the technical features recited in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present application.

Claims

1. A rapid sinking system for a double-walled cofferdam on a bridge, characterized in that: The invention relates to a sinking system, which comprises a vibration sinking system (1) and an auxiliary sinking system (2), the vibration sinking system (1) is provided with a plurality of clamps (6) below, the plurality of clamps (6) are used for clamping the top of a double-wall cofferdam (7), the auxiliary sinking system (2) comprises a soil taking system (8), a water jetting system (9) and a gas and water supply system (10); The soil taking system (8) comprises a plurality of air suction dredgers (15), the pipe body of the air suction dredger (15) is arranged inside the interlayer of the double-wall cofferdam (7), and the lower end of the pipe body is close to the bottom of a cofferdam blade foot (21) of the double-wall cofferdam (7); The gas and water supply system (10) is communicated with the water jetting system (9), the gas supply branch pipe (16) of the gas and water supply system (10) is communicated with the lower end of the pipe body of the air suction dredger (15), the water jetting system (9) comprises a plurality of water jetting nozzles (14), the water jetting nozzles (14) are arranged at the two sides of the lower end of the pipe body of the air suction dredger (15), and the water jetting nozzles (14) are communicated with the gas and water supply system (10); The clamp (6) comprises two oppositely arranged movable chucks (601) and fixed chucks (602), the movable chuck (601) is slidably connected with the clamp body, the clamp (6) is provided with a hydraulic cylinder (603), one end of the hydraulic cylinder (603) is connected with the movable chuck (601), and the other end of the hydraulic cylinder (603) is connected with the clamp body; The inner surfaces of the movable chuck (601) and the fixed chuck (602) are provided with sawtooth-shaped protrusions; The water jetting system (9) further comprises a water supply main pipe (12), the water supply main pipe (12) is annularly arranged on the top of the double-wall cofferdam (7) or below the vibration beam (5), the water supply main pipe (12) is communicated with the water jetting nozzles (14) through a plurality of water supply branch pipes (13), and the water jetting nozzles (14) spray high-pressure water downward along the tangent direction of the cofferdam; The water jetting nozzles (14) and the water supply main pipe (12) are provided with a water supply control valve group (17) therebetween; Parallel air supply branch pipes (16) of the air suction dredger (15) are further arranged, the lower end of the air supply branch pipe (16) is communicated with the air inlet (19) of the air suction dredger (15), and the mud is discharged outside the cofferdam through air-lift reverse circulation.

2. The bridge double-wall cofferdam rapid sinking system according to claim 1, characterized in that: The vibration sinking system (1) comprises a plurality of eccentric vibration hammers, the plurality of eccentric vibration hammers are connected in parallel, the vibration hammers are arranged on the vibration beam (5), and the plurality of clamps (6) are arranged below the vibration beam (5).

3. The bridge double-wall cofferdam rapid sinking system according to claim 1, characterized in that: The bottom of the cofferdam blade foot (21) of the double-wall cofferdam (7) is provided with a suction port (20), the lower end pipe body of the air suction dredger (15) is communicated with the suction port (20), and the upper end of the air suction dredger (15) is provided with a mud discharge port (18) which is outwardly bent.

4. The bridge double-wall cofferdam rapid sinking system according to claim 1, characterized in that: An annularly arranged gas supply main pipe (11) is further arranged, the gas supply main pipe (11) is communicated with the gas supply branch pipe (16), and a gas supply control valve group (22) is arranged between the gas supply branch pipe (16) and the gas supply branch pipe (16); The gas supply main pipe (11) is arranged on the top of the double-wall cofferdam (7) or below the vibration beam (5).

5. The bridge double-wall cofferdam rapid sinking system according to claim 1, characterized in that: The air and water supply system (10) comprises a plurality of air compressor units (29) connected in parallel, the plurality of air compressor units (29) are communicated with a gas storage tank (27) through an air supply pipeline system (28), the gas storage tank (27) is communicated with a gas supply main pipe (11) of the air suction dredger (15) through an air supply hose (26); The air and water supply system (10) further comprises a plurality of water pump groups (25) connected in parallel, the plurality of water pump groups (25) are communicated with a water supply hose (23) through a water supply pipeline system (24), the water supply hose (23) is communicated with a water supply main pipe (12) of the water jet system (9); The air and water supply system (10) is arranged on the sunken system driving ship body (3).

6. The construction method of the bridge double-wall cofferdam rapid sinking system according to any one of claims 1-5, characterized in that: The method comprises: S1, after the double-wall cofferdam (7) is transported to the construction site, the cofferdam is hoisted into position by a floating crane, and the cofferdam is bedded in water; S2, after the floating crane hoists the vibration sinking system (1) and the double-wall cofferdam (7), the pipelines of the soil taking system (8), the water jet system (9) and the air and water supply system (10) are connected; S3, the auxiliary sinking system (2) is started to take soil at the cofferdam blade foot (21) and to jet water to break soil, the linkage hydraulic vibration hammer on the vibration sinking system (1) is started, and the double-wall cofferdam (7) is hammered into soil and sunk to the design elevation; The operation steps of the auxiliary sinking system (2) are: Before the bottom of the cofferdam blade foot (21) of the double-wall cofferdam (7) is bedded, the water supply control valve group (17) and the air supply control valve group (22) are controlled by electricity, the air suction dredger (15) discharges mud outside the cofferdam through air-lift reverse circulation of the air supply branch pipe (16), the water jet nozzle (14) of the water supply branch pipe (13) sprays high-pressure water downward along the tangent direction of the cofferdam, the sinking resistance of the cofferdam is reduced, the rapid auxiliary sinking of the cofferdam is realized, the sinking posture of the cofferdam is actively controlled by starting in different zones; Or the suction port (20) at the bottom of the air suction dredger (15) is blocked, and the blocking is removed before starting sinking to prevent the riverbed mud from flowing into and causing blockage during the bedding process; The water jet flow of the water jet system (9) is greater than the mud flow discharged by the air suction dredger (15), so as to supplement water in the cofferdam wall and ensure the minimum water head difference required for air-lift reverse circulation soil taking; S4, the vibration sinking system (1) and the auxiliary sinking system (2) are closed, the pipeline connection of the soil taking system (8), the water jet system (9) and the air and water supply system (10) is disconnected, and the connection between the vibration sinking system (1) and the double-wall cofferdam (7) is released.

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