Cofferdam structure

Abstract

The utility model belongs to the technical field of hydraulic engineering, and particularly relates to a cofferdam structure, which comprises a plurality of sector-ring steel sheet piles and is characterized in that the sector-ring steel sheet piles are connected through a connecting frame, and the connecting frame comprises an inner arc-shaped plate, an outer arc-shaped plate and a connecting plate. The inner arc-shaped plate and the outer arc-shaped plate are connected through the connecting plate, and the connecting frame is in sliding connection with the sector ring steel sheet pile; through guiding of the multiple arc-shaped guiding plates, water flow can flow along the radian of the arc-shaped guiding plates, the impact force of water is reduced through arc-shaped flowing, and therefore the water flow impact force borne by the fan-shaped steel sheet piles is reduced, the stability of the fan-shaped steel sheet piles is improved, and the influence of water flow impact on the cofferdam is reduced; and the height difference between the top of the arc-shaped guide plate and the horizontal plane can be kept in a relatively stable state through the gas storage box, and the situation that the protective force of the flow guide assembly is reduced due to rising of the horizontal plane is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of water conservancy projects, and in particular relates to a cofferdam structure. Background Art

[0002] A cofferdam refers to a temporary retaining structure built in the construction of permanent water conservancy facilities during water conservancy project construction. Its function is to prevent water and soil from entering the construction site of the building. In the construction of bridge foundations, when the bridge piers and platform foundations are located below the surface water level, it is necessary to build a cofferdam, which can not only prevent water and retain water, but also support the pit wall of the foundation pit. Since the cofferdam is located in the water, the outside is in contact with the water, while the water on the inside will be drained. Therefore, the inner and outer sides of the cofferdam are subjected to different pressures. The outside of the cofferdam will be affected by the impact of the water flow, and the continuous impact of the water flow has a certain adverse effect on the cofferdam. Therefore, it is necessary to reduce the impact of the water flow on the cofferdam. Utility Model Content

[0003] The utility model provides a cofferdam structure, which has the characteristics of making the structure of the fan ring steel sheet pile more stable through a connecting frame, and causing the water flow to flow along the curvature of the arc-shaped guide plates through the guidance of a plurality of arc-shaped guide plates, thereby reducing the impact force of the water flow on the fan ring steel sheet piles, thereby reducing the impact force of the water flow on the fan ring steel sheet piles, improving the stability of the fan ring steel sheet piles, and being beneficial to reducing the influence of the water flow impact on the cofferdam.

[0004] The utility model provides the following technical solution: a plurality of fan ring steel sheet piles, characterized in that: the plurality of fan ring steel sheet piles are connected by a connecting frame, the connecting frame comprises an inner arc plate, an outer arc plate and a connecting plate, the inner arc plate and the outer arc plate are connected by the connecting plate, the connecting frame is slidably connected to the fan ring steel sheet piles, and the outer side of the outer arc plate is slidably connected with a guide assembly, the guide assembly comprises an arc guide plate, a fixed plate and an air storage box, the bottom of the fixed plate is fixedly connected to one side of the arc guide plate, and the air storage box is located between the arc guide plate and the fixed plate, and the fixed plate is slidably connected to the outer arc plate.

[0005] Among them, one side of the inner arc plate matches the size of the inner arc surface of the fan ring steel sheet pile, and one side of the outer arc plate matches the size of the outer arc surface of the fan ring steel sheet pile.

[0006] Wherein, connecting blocks are provided on both sides of the connecting plate, connecting grooves are provided on both sides of the fan ring steel sheet piles, and the connecting blocks are slidably connected to the connecting grooves.

[0007] Wherein, a side of the outer arc plate away from the connecting plate is a plane, and a T-shaped sliding groove is provided on a side of the outer arc plate away from the connecting plate.

[0008] Wherein, a T-shaped plate is provided on one side of the fixed plate, and the T-shaped plate is slidably connected to the T-shaped sliding groove.

[0009] The beneficial effects of the utility model are as follows: a circular cofferdam can be formed by assembling a plurality of fan-ring steel sheet piles and a connecting frame, and the structure of the fan-ring steel sheet piles can be made more stable by connecting two adjacent fan-ring steel sheet piles by the connecting frame, and the water flow can be guided along the curvature of the arc-shaped guide plate by the guidance of a plurality of arc-shaped guide plates, and the impact force of the water is reduced by the arc-shaped flow, thereby reducing the impact force of the water flow on the fan-ring steel sheet piles, improving the stability of the fan-ring steel sheet piles, and helping to reduce the impact of the water flow impact on the cofferdam, and at the same time, the height difference between the top of the arc-shaped guide plate and the horizontal plane can be maintained in a relatively stable state through the air storage box, thereby avoiding the situation where the protective force of the guide assembly is reduced due to the rising horizontal plane.

[0010] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0012] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0013] Figure 3 For this utility model Figure 2 A magnified view of part A in FIG.

[0014] Figure 4 It is a three-dimensional structural schematic diagram of the connecting frame in the utility model;

[0015] Figure 5 It is a side view structural schematic diagram of the flow guide assembly in the utility model;

[0016] In the figure: 1. fan ring steel sheet pile; 11. connecting groove; 2. connecting frame; 21. inner arc plate; 22. outer arc plate; 221. T-shaped slide groove; 23. connecting plate; 231. connecting block; 3. guide assembly; 31. arc guide plate; 32. fixing plate; 321. T-shaped plate; 33. air storage box. DETAILED DESCRIPTION

[0017] See also Figure 1-Figure 5The utility model provides the following technical solution: it includes a plurality of fan ring steel sheet piles 1, characterized in that: the plurality of fan ring steel sheet piles 1 are connected by a connecting frame 2, the connecting frame 2 includes an inner arc plate 21, an outer arc plate 22 and a connecting plate 23, the inner arc plate 21 and the outer arc plate 22 are connected by the connecting plate 23, the connecting frame 2 is slidably connected to the fan ring steel sheet pile 1, and the outer side of the outer arc plate 22 is slidably connected with a guide assembly 3, the guide assembly 3 includes an arc guide plate 31, a fixed plate 32 and an air storage box 33, the bottom of the fixed plate 32 is fixedly connected to one side of the arc guide plate 31, and the air storage box 33 is located between the arc guide plate 31 and the fixed plate 32, and the fixed plate 32 is slidably connected to the outer arc plate 22.

[0018] In the present embodiment: it includes a plurality of fan ring steel sheet piles 1, the sizes of the plurality of fan ring steel sheet piles 1 are the same, and the bottom of the fan ring steel sheet piles 1 is at an angle, so that the fan ring steel sheet piles 1 can be sunk into the soil. By assembling the plurality of fan ring steel sheet piles 1, a circular cofferdam can be formed. The cofferdam can prevent water and surround water, and can also support the pit wall of the foundation pit, so that construction work can be carried out when the bridge piers and platform foundations are located below the surface water level. The plurality of fan ring steel sheet piles 1 are connected by a connecting frame 2, and two adjacent fan ring steel sheet piles 1 can be connected by the connecting frame 2, so that the structure of the fan ring steel sheet piles 1 is more stable. The connecting frame 2 includes an inner arc plate 21, an outer arc plate 22 and a connecting plate 23. The inner arc The size of the inner arc plate 21 is smaller than the outer arc plate 22. The inner arc plate 21 and the outer arc plate 22 are connected by a connecting plate 23. The two sides of the connecting plate 23 are fixedly connected to one side of the inner arc plate 21 and the outer arc plate 22 respectively, so that the distance between the inner arc plate 21 and the outer arc plate 22 is fixed. When a plurality of fan ring steel sheet piles 1 and a plurality of connecting frames 2 are assembled, the fan ring steel sheet piles 1 will be located between the two adjacent inner arc plates 21 and the two outer arc plates 22 at the same time. At the same time, the connecting plate 23 will be located between the two adjacent fan ring steel sheet piles 1. The connecting frame 2 is slidably connected to the fan ring steel sheet piles 1. Through the parallel sliding of the connecting frame 2 and the fan ring steel sheet piles 1, the connecting frame 2 and the fan ring steel sheet piles 1 can be made to be connected. The outer side of the outer arc plate 22 is slidably connected with a guide assembly 3. When the connecting frame 2 is connected to the fan ring steel sheet pile 1, the guide assembly 3 is located on the outer side of the connecting frame 2 and the fan ring steel sheet pile 1. The guide assembly 3 includes an arc guide plate 31, a fixed plate 32 and an air storage box 33. The arc guide plate 31 is an arc extending upward. When water flows in the direction of the fan ring steel sheet pile 1, the water flow will flow along the curvature of the arc guide plate 31 through the guidance of a plurality of arc guide plates 31. The water flow impact force on the fan ring steel sheet pile 1 is reduced through the arc-shaped flow, thereby improving the stability of the fan ring steel sheet pile 1, which is beneficial to reducing the impact of water flow impact on the cofferdam. The bottom of the fixed plate 32 and the arc guide plate 31 are The fixing plate 32 is located between the arc guide plate 31 and the outer arc plate 22, and the air storage box 33 is located between the arc guide plate 31 and the fixing plate 32. A large amount of gas is stored in the air storage box 33, and the mass of the air storage box 33 is relatively light. Therefore, the air storage box 33 has a large buoyancy in the water. The fixing plate 32 is slidably connected to the outer arc plate 22. When the horizontal plane rises or falls, the air storage box 33 will rise or fall accordingly, thereby driving the guide assembly 3 to move upward or downward as a whole, which is conducive to keeping the height difference between the top of the arc guide plate 31 and the horizontal plane in a relatively stable state, thereby avoiding the situation where the protective force of the guide assembly 3 decreases due to the rising of the horizontal plane.

[0019] One side of the inner arc plate 21 matches the inner arc surface size of the fan ring steel sheet pile 1, and one side of the outer arc plate 22 matches the outer arc surface size of the fan ring steel sheet pile 1; when the connecting frame 2 is connected to the fan ring steel sheet pile 1, one side of the inner arc plate 21 is in contact with the inner arc surface of the fan ring steel sheet pile 1, and one side of the outer arc plate 22 is in contact with the outer arc surface of the fan ring steel sheet pile 1.

[0020] Connecting blocks 231 are provided on both sides of the connecting plate 23, and connecting grooves 11 are opened on both sides of the fan ring steel sheet piles 1, and the connecting blocks 231 are slidably connected to the connecting grooves 11; through the connection between the connecting blocks 231 and 11, the two adjacent fan ring steel sheet piles 1 can be fixed on both sides of the connecting plate 23, avoiding horizontal displacement of the fan ring steel sheet piles 1.

[0021] The side of the outer arc plate 22 away from the connecting plate 23 is a plane, and a T-shaped slot 221 is provided on the side of the outer arc plate 22 away from the connecting plate 23; since one side of the outer arc plate 22 is a plane, the fixing plate 32 is attached to the outer arc plate 22 .

[0022] A T-shaped plate 321 is provided on one side of the fixed plate 32, and the T-shaped plate 321 is slidably connected to the T-shaped slide groove 221; the height of the guide component 3 can be changed by sliding the T-shaped plate 321 and the T-shaped slide groove 221, and the shape of the T-shaped plate 321 and the T-shaped slide groove 221 can avoid the guide component 3 from being separated from the connecting frame 2.

[0023] The working principle and use process of the utility model: when in use, the bottom of the fan ring steel sheet pile 1 is at an angle, which is convenient for the fan ring steel sheet pile 1 to sink into the soil. By assembling a plurality of fan ring steel sheet piles 1 and a plurality of connecting frames 2, a circular cofferdam can be formed. By sliding the connecting frame 2 and the fan ring steel sheet pile 1 in parallel, the connecting block 231 slides into the inner side of 11, so that the connecting frame 2 and the fan ring steel sheet pile 1 can be connected. When the assembly of the plurality of fan ring steel sheet piles 1 and the plurality of connecting frames 2 is completed, the fan ring steel sheet pile 1 will be located between the two adjacent inner arc plates 21 and the two outer arc plates 22 at the same time. At the same time, the connecting plate 23 will be located between the two adjacent fan ring steel sheet piles 1. Since the arc guide plate 31 is an arc extending upward, when the water flows in the direction of the fan ring steel sheet pile 1, the water will flow along the curvature of the arc guide plate 31 through the guidance of several arc guide plates 31, and the impact force of the water flow on the fan ring steel sheet pile 1 is reduced by the arc-shaped flow. Since a large amount of gas is stored in the air storage box 33 and the mass of the air storage box 33 is relatively light, the air storage box 33 has a large buoyancy in the water. When the horizontal plane rises or falls, the air storage box 33 will rise or fall accordingly, thereby driving the guide assembly 3 to move upward or downward as a whole, which is beneficial to keep the height difference between the top of the arc guide plate 31 and the horizontal plane in a relatively stable state.

Claims

1. A cofferdam structure, comprising a plurality of fan-ring steel sheet piles (1), characterized in that: A plurality of the fan ring steel sheet piles (1) are connected by a connecting frame (2), the connecting frame (2) comprising an inner arc plate (21), an outer arc plate (22) and a connecting plate (23), the inner arc plate (21) and the outer arc plate (22) are connected by the connecting plate (23), the connecting frame (2) is slidably connected to the fan ring steel sheet piles (1), and a guide assembly (3) is slidably connected to the outer side of the outer arc plate (22), the guide assembly (3) comprising an arc guide plate (31), a fixed plate (32) and an air storage box (33), the bottom of the fixed plate (32) is fixedly connected to one side of the arc guide plate (31), and the air storage box (33) is located between the arc guide plate (31) and the fixed plate (32), and the fixed plate (32) is slidably connected to the outer arc plate (22).

2. A cofferdam structure according to claim 1, characterized in that: One side of the inner arc plate (21) matches the size of the inner arc surface of the fan ring steel sheet pile (1), while one side of the outer arc plate (22) matches the size of the outer arc surface of the fan ring steel sheet pile (1).

3. A cofferdam structure according to claim 2, characterized in that: Both sides of the connecting plate (23) are provided with connecting blocks (231), and both sides of the fan ring steel sheet pile (1) are provided with connecting grooves (11), and the connecting blocks (231) are slidably connected to the connecting grooves (11).

4. A cofferdam structure according to claim 3, characterized in that: The side of the outer arc-shaped plate (22) away from the connecting plate (23) is a plane, and the side of the outer arc-shaped plate (22) away from the connecting plate (23) is provided with a T-shaped sliding groove (221).

5. A cofferdam structure according to claim 4, characterized in that: A T-shaped plate (321) is provided on one side of the fixing plate (32), and the T-shaped plate (321) is slidably connected to the T-shaped sliding groove (221).

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