A steel cofferdam water permeability testing device

Abstract

The invention discloses a steel cofferdam water permeability test device, which belongs to the technical field of cofferdam water permeability test, and comprises Larsen steel sheet piles, which are driven to form a cofferdam, a reference column is arranged in the middle of the cofferdam, the reference column is rotatably connected to a cantilever, a flushing device is arranged at the end of the cantilever, and a twisting and collision device is arranged in the middle of the cantilever. The invention twists and collides the Larsen steel sheet piles, so that the Larsen steel sheet piles hit form an angle with the side of the cofferdam, thereby making it easy to cause leakage risk to the adjacent Larsen steel sheet piles, and facilitating repair tests for the generated leakage.

Description

Technical Field

[0001] The invention relates to the technical field of water seepage testing of steel cofferdams, and in particular to a water seepage testing device for steel cofferdams. Background Art

[0002] Steel sheet piles are a type of steel with locks. They have straight, grooved, and U-shaped cross-sections, and come in a variety of sizes and interlocking forms. In the construction field, steel sheet piles are often used to block water and facilitate construction. They are strong and easy to drive into hard soil layers. If necessary, they can be made into a cage by adding inclined supports. They have good waterproof properties, are widely used, and can be recycled many times.

[0003] Under the repeated impact of waves and long-term impact of water flow in different directions, leakage is prone to occur between the joints of steel sheet piles due to deformation or improper construction. The existing testing equipment cannot accelerate the simulation test, which is not conducive to targeted plugging operations for the leakage risks that occur. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art and to propose a steel cofferdam water permeability testing device, thereby solving the problem of low testing efficiency existing in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A steel cofferdam water permeability testing device comprises Larsen steel sheet piles. The Larsen steel sheet piles are driven to form a cofferdam. A reference column is arranged in the middle of the cofferdam. The reference column is rotatably connected to a cantilever. A flushing device is arranged at the end of the cantilever. A twisting and impact device is arranged in the middle of the cantilever.

[0007] Preferably, one side of the reference column is fixedly connected to the first motor, the main shaft of the first motor is fixedly connected to the driving gear, the bottom of the cantilever is fixedly connected to the toothed disc, and the toothed disc is meshed with the driving gear.

[0008] Preferably, the twisting collision device comprises a limit plate, a plurality of arc-shaped protrusions are fixedly connected to the outer circular array of the limit plate, the upper side of the cantilever is fixedly connected to the vertical plate, the vertical plate is slidably connected to the support rod, one end of the support rod is fixedly connected to the rack, and the other end of the support rod abuts against the outer circular surface of the limit plate, the cantilever is rotatably connected to the rotating shaft, and a torsion spring is arranged between the rotating shaft and the cantilever, the upper end of the rotating shaft is fixedly connected to the first gear, and the first gear is meshed with the rack;

[0009] A cross bar is provided at the lower end of the rotating shaft, and both ends of the cross bar are respectively fixedly connected to a suspension rod, and the lower end of the suspension rod is fixedly connected to a hammer column.

[0010] Preferably, the rotating shaft is slidably connected to the cross bar, a first spring is fixedly connected between the lower end of the rotating shaft and the cross bar, the bottom of the cantilever is fixedly connected to the support rod, the lower end of the support rod is rotatably connected to the roller, and the cross bar swings to the bottom of the roller so that the cross bar descends along the axial direction of the rotating shaft.

[0011] Preferably, the cantilever and the support rod are both telescopic structures.

[0012] Preferably, the upper end of the reference column is fixedly connected to the inclined rod, the lower end of the inclined rod is fixedly connected to the sliding sleeve, and the cantilever is slidably connected to the sliding sleeve.

[0013] Preferably, the flushing device is a water pump or a water paddle.

[0014] The advantages of the present invention are as follows: a steel cofferdam water permeability testing device provided by the present invention uses a cantilever with a twisting and impacting device to knock and impact at different positions of the cofferdam, so as to form leakage gaps and other dangerous situations between the Larsen steel sheet piles, and because the two hangers are located on both sides of the Larsen steel sheet piles, as the cantilever rotates, the support rod abuts against the outer cylindrical surface of the limit plate and slides to the raised part of the arc-shaped protrusion, and the sliding of the support rod and the rack drives the rotating shaft to rotate, and cooperates with the torsion spring on the rotating shaft, so that the rotating shaft can rotate forward and backward periodically to twist the Larsen steel sheet piles, so that the Larsen steel sheet piles that are hit form an angle with the side of the cofferdam, thereby easily causing the adjacent Larsen steel sheet piles to have a leakage risk, and it is convenient to carry out a repair test on the generated leakage.

[0015] During the forward and reverse rotation of the rotating shaft of the present invention, when the rotating shaft supports the rod and the roller, the cross bar is moved to the bottom of the roller through the guidance of the inclined surface, that is, the cross bar descends on the rotating shaft, so that the position of the hammer column of the twisting and impacting is lowered, thereby facilitating the leakage test of the cofferdam at different positions and depths. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a basic structural schematic diagram of the present invention;

[0017] Figure 2 yes Figure 1 A local enlarged view of point E in FIG.

[0018] Figure 3 It is a schematic diagram of the state of testing the cofferdam according to the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] like Figure 1-3As shown, a steel cofferdam water permeability testing device provided by the present invention comprises a Larsen steel sheet pile 1, which is driven to form a cofferdam, a reference column 2 is arranged in the middle of the cofferdam, the reference column 2 is rotatably connected to a cantilever 3, one side of the reference column 2 is fixedly connected to a first motor 21, the main shaft of the first motor 21 is fixedly connected to a driving gear 22, the bottom of the cantilever 3 is fixedly connected to a toothed disc 23, the toothed disc 23 is meshed with the driving gear 22, the first motor 21 drives the cantilever 3 to rotate through the toothed disc 23 and the driving gear 22, a flushing device 4 is arranged at the end of the cantilever 3, the flushing device 4 is a water pump or a water paddle, the water paddle is driven by a motor to rotate at a high speed to form waves, the flushing device 4 changes its position relative to the cofferdam as the cantilever 3 rotates, and by intensifying the water flow to collide with the cofferdam, the danger of cofferdam leakage is discovered in time, and it is convenient to perform a water-stop test under wave load or other conditions, and a twisting and collision device 5 is arranged in the middle of the cantilever 3.

[0021] Specifically, the twisting collision device 5 includes a limit plate 51, a plurality of arc-shaped protrusions 52 are fixedly connected to the outer circular ring array of the limit plate 51, a vertical plate 53 is fixedly connected to the upper side of the cantilever 3, the vertical plate 53 is slidably connected to a support rod 54, one end of the support rod 54 is fixedly connected to a rack 55, and the other end of the support rod 54 abuts against the outer circular surface of the limit plate 51, the cantilever 3 is rotatably connected to a rotating shaft 56, and a torsion spring is arranged between the rotating shaft 56 and the cantilever 3, and the upper end of the rotating shaft 56 is fixedly connected to a first gear 57, and the first gear 57 is meshed with the rack 55;

[0022] A cross bar 58 is provided at the lower end of the rotating shaft 56. Both ends of the cross bar 58 are fixedly connected to a suspension rod 59 respectively. The lower end of the suspension rod 59 is fixedly connected to a hammer column 591, and the hammer column 591 is made of rubber.

[0023] The present invention drives the cantilever 3 to rotate through the first motor 21. The rotation of the cantilever 3 changes the position of the flushing device 4 relative to the cofferdam, intensifying the impact of the water flow on the cofferdam in different directions, making it easy to timely discover the water-stopping performance of the bite seam of the Larsen steel sheet pile 1. The insertion angles of different Larsen steel sheet piles 1 test the construction level and the water-stopping performance of the Larsen steel sheet pile 1 in combination with the waterstop strip. Under the repeated impact of waves and long-term impact of water flow in different directions, leakage is prone to occur. The existing testing device cannot accelerate the simulation test, which is not conducive to targeted plugging operations for the leakage risks that occur.

[0024] The present invention uses the cantilever 3 with the twisting and impacting device 5 to strike and impact at different positions of the cofferdam, so as to form leakage gaps and other dangerous situations between the Larsen steel sheet piles 1. Since the two hangers 59 are located on both sides of the Larsen steel sheet pile 1, as the cantilever 3 rotates, the support rod 54 abuts against the outer cylindrical surface of the limit plate 51 and slides to the raised part of the arc-shaped protrusion 52. The support rod 54 and the rack 55 slide to drive the rotating shaft 56 to rotate. With the torsion spring on the rotating shaft 56, the rotating shaft 56 can rotate forward and backward periodically to twist the Larsen steel sheet pile 1, so that the impacted Larsen steel sheet pile 1 forms an angle with the side of the cofferdam, thereby easily causing the adjacent Larsen steel sheet piles 1 to have a leakage risk, and it is convenient to perform a repair test on the generated leakage (such as what method or material to use to plug the leak).

[0025] As an embodiment of the present invention, the rotating shaft 56 is slidably connected to the cross bar 58, a first spring 581 is fixedly connected between the lower end of the rotating shaft 56 and the cross bar 58, the bottom of the cantilever 3 is fixedly connected to the support rod 582, the lower end of the support rod 582 is rotatably connected to the roller 583, and the cross bar 58 swings to the bottom of the roller 583 so that the cross bar 58 descends along the axial direction of the rotating shaft 56.

[0026] In this embodiment, during the forward and reverse rotation of the rotating shaft 56, when the rotating shaft 56 rotates toward the support rod 582 and the roller 583, the cross bar 58 is moved to the bottom of the roller 583 through the guidance of the inclined surface, that is, the cross bar 58 descends on the rotating shaft 56, so that the position of the twisting and impacting hammer column 591 is lowered, thereby facilitating the leakage test of the cofferdam at different positions and depths.

[0027] As an embodiment of the present invention, the cantilever 3 and the support rod 54 are both telescopic structures, such as hydraulic telescopic rods. The cantilever 3 and the support rod 54 extend synchronously. The upper end of the reference column 2 is fixedly connected to the inclined rod 6, and the lower end of the inclined rod 6 is fixedly connected to the sliding sleeve 61. The cantilever 3 is slidably connected to the sliding sleeve 61, which is convenient for adapting to square cofferdams or rectangular cofferdams.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel cofferdam water permeability testing device, comprising Larsen steel sheet piles (1), wherein the Larsen steel sheet piles (1) are driven to form a cofferdam, wherein a reference column (2) is arranged in the middle of the cofferdam, wherein the reference column (2) is rotatably connected to a cantilever (3), and a flushing device (4) is arranged at the end of the cantilever (3), wherein the device is characterized in that: A twisting and impacting device (5) is provided in the middle of the cantilever (3); The twisting collision device (5) comprises a limit plate (51), the outer annular array of the limit plate (51) is fixedly connected to a plurality of arc-shaped protrusions (52), the upper side of the cantilever (3) is fixedly connected to a vertical plate (53), the vertical plate (53) is slidably connected to a support rod (54), one end of the support rod (54) is fixedly connected to a rack (55), the other end of the support rod (54) abuts against the outer circumferential surface of the limit plate (51), the cantilever (3) is rotatably connected to a rotating shaft (56), a torsion spring is arranged between the rotating shaft (56) and the cantilever (3), the upper end of the rotating shaft (56) is fixedly connected to a first gear (57), and the first gear (57) is meshed with the rack (55); A crossbar (58) is provided at the lower end of the rotating shaft (56), and both ends of the crossbar (58) are respectively fixedly connected to a suspension rod (59), and the lower end of the suspension rod (59) is fixedly connected to a hammer column (591); The rotating shaft (56) is slidably connected to the cross bar (58); a first spring (581) is fixedly connected between the lower end of the rotating shaft (56) and the cross bar (58); the bottom of the cantilever (3) is fixedly connected to a support rod (582); the lower end of the support rod (582) is rotatably connected to a roller (583); the cross bar (58) swings to the bottom of the roller (583) so that the cross bar (58) descends along the axial direction of the rotating shaft (56).

2. A steel cofferdam water permeability testing device according to claim 1, characterized in that: One side of the reference column (2) is fixedly connected to a first motor (21), a main shaft of the first motor (21) is fixedly connected to a driving gear (22), and a bottom of the cantilever (3) is fixedly connected to a toothed disc (23), the toothed disc (23) being meshed with the driving gear (22).

3. A steel cofferdam water permeability testing device according to claim 1, characterized in that: The cantilever (3) and the support rod (54) are both telescopic structures.

4. A steel cofferdam water permeability testing device according to claim 3, characterized in that: The upper end of the reference column (2) is fixedly connected to the inclined rod (6), the lower end of the inclined rod (6) is fixedly connected to the sliding sleeve (61), and the cantilever (3) is slidably connected to the sliding sleeve (61).

5. A steel cofferdam water permeability testing device according to claim 1, characterized in that: The flushing device (4) is a water pump or a water paddle.

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