Water retaining cofferdam structure for constructing plank road and construction method

Abstract

The invention relates to the technical field of cofferdam construction, in particular to a water retaining cofferdam structure for constructing a plank road and a construction method. Comprising a plank road plate, a plurality of first supporting columns are arranged at the bottom of the upstream side of the plank road plate, a water baffle is arranged between every two adjacent first supporting columns, a plurality of second supporting columns are arranged at the bottom of the downstream side of the plank road plate, and supporting assemblies are arranged between the first supporting columns and the opposite second supporting columns and between every two adjacent second supporting columns; a reinforcing assembly is arranged on the side, away from the first supporting column, of the second supporting column. A constructor drives the first supporting columns, the second supporting columns and the water baffle into a riverbed, the supporting assemblies are arranged between the first supporting columns and the opposite second supporting columns and between the adjacent second supporting columns to guarantee firmness, the reinforcing assemblies prevent toppling, and compared with a traditional cofferdam formed by soil piling, construction of the water retaining cofferdam is more convenient, and the construction efficiency is improved. And the trestle road plate at the top can be used as a construction trestle road or a flow regulating road.

Description

Technical Field

[0001] The invention relates to the technical field of cofferdam construction, in particular to a water retaining cofferdam structure for constructing a plank road and a construction method. Background Art

[0002] In the existing municipal engineering projects, open excavation method is used in the construction of permanent facilities such as tunnels, subways, bridges, etc. through lakes. In order to prevent water and soil from entering the construction site of the building, a cofferdam is first built to excavate the foundation pit and then the building is built. After the construction is completed, the cofferdam is removed. The height of the cofferdam is higher than the highest water level that may occur during the construction period.

[0003] The common foundation pit water retaining cofferdams nowadays generally first drive in steel plates of the same width as the cofferdam and then fill the steel sheet piles with soil. During the construction and dismantling process, a large amount of manpower and material resources are required to transport them, resulting in high costs, poor environmental protection, and a relatively single function of the cofferdam. Summary of the invention

[0004] The present invention aims to solve the above-mentioned problem, thereby providing a water retaining cofferdam structure and a construction method for a construction plank road which can improve the construction efficiency.

[0005] The present invention solves the above-mentioned problem by adopting the following technical solution: A water retaining cofferdam structure for a construction plank road comprises a plank road plate, wherein a plurality of first supporting columns are arranged at the bottom of the plank road plate on the water-facing side, a water retaining plate is arranged between adjacent first supporting columns, a plurality of second supporting columns are arranged at the bottom of the plank road plate on the water-repellent side, supporting assemblies are arranged between the first supporting columns and the opposite second supporting columns and between adjacent second supporting columns, and a reinforcement assembly is arranged on the side of the second supporting column away from the first supporting column.

[0006] A construction method for a water retaining cofferdam structure for a construction plank road comprises the following steps: S1: Positioning and laying out, driving a first group of first support columns and second support columns into the riverbed, connecting the first support columns with the second support columns using support components, and installing reinforcement components to reinforce the second support columns; S2: Drive a second group of first support columns and second support columns along the length direction of the positioning line with reference to S1, connect the two second support columns through the support assembly, install the water retaining plate between the first support columns and drive it into the riverbed to form a water retaining cofferdam; S3: Install the plank road slab on the top of the two groups of first support columns and the second support columns to form a water retaining cofferdam serving as the construction plank road.

[0007] Compared with the prior art, the present invention adopting the above technical solution has the following outstanding features: The construction workers drive the first support column, the second support column and the water retaining plate into the riverbed. Support components are set between the first support column and the opposite second support column and between adjacent second support columns to ensure their firmness. Reinforcement components are used to prevent tipping. Compared with the method of directly piling up soil in woven bags, this is more convenient for the construction of the water retaining cofferdam. The plank road board on the top can be used as a construction plank road or a flow diversion road.

[0008] Preferably, a further technical solution of the present invention is: Furthermore, a reserved blind hole is opened at the top center of the first support column and the second support column, and semi-cylindrical clamping columns are set at the four corners of the bottom of the plank board. When adjacent plank boards are connected, the two adjacent semi-cylindrical clamping columns are combined into a cylindrical shape and inserted into the reserved blind hole.

[0009] Furthermore, a hammer positioning block is movably inserted in the reserved blind hole.

[0010] Furthermore, a plurality of positioning cards for hammering are arranged on the top of the water retaining plate.

[0011] Furthermore, T-shaped connecting grooves are longitudinally provided on both sides of the first supporting column, and T-shaped clamping strips slidably connected to the connecting grooves are provided on both sides of the water retaining plate.

[0012] Furthermore, a water stop strip is provided between the connecting groove and the clamping strip.

[0013] Furthermore, the reinforcement assembly includes a triangular support fixed to the lower part of the second support column away from the first support column, and an anchor rod parallel to the second support column is provided at the bottom of the corner of the triangular support away from the second support column.

[0014] Furthermore, the support assembly includes a fixed shaft, on which four equal-length support rods are rotatably connected. Two connecting seats are arranged from top to bottom on the opposite surface of the first support column and the second support column, and on the opposite surface of the adjacent second support column, and the ends of the support rods are connected to the connecting seats.

[0015] Furthermore, the tops of the four sides of the second support column and the tops of the opposite surfaces of the first support column and the second support column are respectively provided with slots, a support beam is connected between two opposite slots, and the top surface of the support beam is in contact with the plank board. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a water retaining plate according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the first support column according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the second support column according to an embodiment of the present invention; Figure 5 This is a schematic diagram of a triangular brace structure according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of a plank road plate according to an embodiment of the present invention; Figure 7 This is a schematic structural diagram of the connection relationship between the first supporting column and the second supporting column according to an embodiment of the present invention; Markings in the figure are: 1. water retaining plate; 11. positioning card; 12. card strip; 21. first supporting column; 211. hammer positioning block; 212. reserved blind hole; 213. connecting groove; 22. second supporting column; 221. triangular support; 222. anchor rod; 223. card slot; 31. fixed shaft; 32. supporting rod; 4. plank road board; 41. semi-columnar card column; 5. supporting beam. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0018] A water retaining cofferdam structure for a construction plank road comprises a plank road plate 4, guardrails are arranged on both sides of the plank road plate 4, a plurality of first support columns 21 are arranged at the bottom of the water-facing side of the plank road plate 4, a water retaining plate 1 is arranged between adjacent first support columns 21, a plurality of second support columns 22 are arranged at the bottom of the water-receiving side of the plank road plate 4, support components are arranged between the first support columns 21 and the opposite second support columns 22 and between adjacent second support columns 22, a reinforcement component is arranged on the side of the second support column 22 away from the first support column 21, and the bottoms of the first support columns 21 and the second support columns 22 are conical bottoms for easy downward insertion.

[0019] A construction method for a water retaining cofferdam structure for a construction plank road comprises the following steps: S1: Positioning and laying out the line, driving a first group of first support columns 21 and second support columns 22 into the riverbed, connecting the first support columns 21 and the second support columns 22 using support components, and installing reinforcement components to reinforce the second support columns 22; S2: Drive the second group of first support columns 21 and second support columns 22 along the length direction of the positioning line with reference to S1, and connect the two second support columns 22 through the support assembly, install the water retaining plate 1 between the first support columns 21 and drive it into the riverbed to form a water retaining cofferdam; S3: Install the plank road board 4 on the top of the two groups of first support columns 21 and the second support columns 22 to form a water retaining cofferdam as the construction plank road.

[0020] Furthermore, a reserved blind hole 212 is provided at the center of the top of the first support column 21 and the second support column 22, and a semi-cylindrical clamping column 41 is provided at the four corners of the bottom of the plank board 4. The plank board 4 is square. When adjacent plank boards 4 are connected, two adjacent semi-cylindrical clamping columns 41 are combined into a cylindrical shape and inserted into the reserved blind hole 212. After the first support column 21 and the second support column 22 are driven into the riverbed, the plank board 4 is fixed by the reserved blind hole 212.

[0021] Furthermore, a hammer positioning block 211 is movably inserted in the reserved blind hole 212. When the first support column 21 and the second support column 22 are installed, the hammer positioning block 211 is placed in the reserved blind hole 212, and the first support column 21 and the second support column 22 are installed by hitting the hammer positioning block 211, and are removed after installation.

[0022] Furthermore, a plurality of positioning cards 11 for hammering are provided on the top of the water retaining plate 1. The positioning cards 11 are installed on both sides of the top of the water retaining plate 1. The water retaining plate 1 is driven into the riverbed by hammering the positioning cards 11 and is removed after installation.

[0023] Furthermore, T-shaped connecting grooves 213 are provided on both sides of the first support column 21 in the longitudinal direction, and T-shaped clamping strips 12 slidably connected to the connecting grooves 213 are provided on both sides of the water retaining plate 1. The water retaining plate 1 is connected to the first support column 21 through the clamping strips 12 and the connecting grooves 213. The front side of the first support column 21 also has a connecting groove 213 for changing the direction of the plank road.

[0024] Furthermore, a water stop strip is provided between the connection groove 213 and the clamping strip 12. The water stop strip expands when it encounters water, so that the expanded water stop strip can fill the gap between the clamping groove 223 and the clamping block, thereby reducing water leakage.

[0025] Furthermore, the reinforcement component includes a triangular support 221 fixed to the lower part of the second support column 22 away from the first support column 21, and the bottom of the corner of the triangular support 221 away from the second support column 22 is provided with an anchor rod 222 parallel to the second support column 22. The triangular support 221 is a right-angled triangle, and a longitudinal groove is opened at the lower part of the second support column 22 away from the first support column 21, and the top and bottom of the longitudinal groove are respectively provided with fixed seats. The triangular support 221 includes a bottom support and an oblique support, the inner end of the bottom support is connected to the bottom fixed seat, the inner end of the oblique support is connected to the top fixed seat, the outer ends of the bottom support and the oblique support are connected, the top end of the anchor rod 222 is connected to the end of the bottom support, and the anchor rod 222 is inserted into the riverbed to increase the stability of the second support column 22.

[0026] Furthermore, the support assembly includes a fixed shaft 31, on which four equal-length support rods 32 are rotatably connected. Two connecting seats are provided from top to bottom on the opposite surface of the first support column 21 and the second support column 22, and on the opposite surface of the adjacent second support column 22. The ends of the support rods 32 are connected to the connecting seats to enhance the stability of the cofferdam.

[0027] Furthermore, slots 223 are respectively provided at the tops of the four sides of the second support column 22 and the tops of the opposite surfaces of the first support column 21 and the second support column 22. A support beam 5 is connected between the two opposite slots 223. The top surface of the support beam 5 is in contact with the plank road board 4. The height of the slot 223 is the same as that of the support beam 5, thereby enhancing the stability of the cofferdam and bearing the plank road load.

[0028] The construction workers drive the first support column 21, the second support column 22 and the water retaining plate 1 into the riverbed. Support components are arranged between the first support column 21 and the corresponding second support column 22 and between adjacent second support columns 22 to ensure their firmness. Reinforcement components are used to prevent tipping. Compared with the cofferdam formed by traditional earth piling, the construction of the water retaining cofferdam is more convenient, and the plank road board 4 on the top can be used as a construction plank road or flow diversion road.

[0029] The above description is only a preferred feasible embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made using the contents of the present specification and its drawings are included in the scope of rights of the present invention.

Claims

1. A water retaining cofferdam structure for a construction plank road, characterized in that: It includes a plank road plate, wherein a plurality of first support columns are arranged at the bottom of the water-facing side of the plank road plate, a water retaining plate is arranged between adjacent first support columns, a plurality of second support columns are arranged at the bottom of the water-receiving side of the plank road plate, support components are arranged between the first support columns and the opposite second support columns and between adjacent second support columns, and a reinforcement component is arranged on the side of the second support column away from the first support column.

2. The water retaining cofferdam structure for the construction plank road according to claim 1 is characterized in that: A reserved blind hole is opened at the top center of the first support column and the second support column, and semi-cylindrical clamping columns are set at the four corners of the bottom of the plank board. When adjacent plank boards are connected, the two adjacent semi-cylindrical clamping columns are combined into a cylindrical shape and inserted into the reserved blind hole.

3. The water retaining cofferdam structure for the construction plank road according to claim 2 is characterized in that: A hammer positioning block is movably inserted in the reserved blind hole.

4. The water retaining cofferdam structure for the construction plank road according to claim 1, characterized in that: A plurality of positioning cards for hammering are arranged on the top of the water retaining plate.

5. The water retaining cofferdam structure for the construction plank road according to claim 1 is characterized in that: T-shaped connecting grooves are longitudinally provided on both sides of the first supporting column, and T-shaped clamping strips slidably connected to the connecting grooves are provided on both sides of the water retaining plate.

6. The water retaining cofferdam structure for the construction plank road according to claim 5, characterized in that: A water stop strip is arranged between the connecting groove and the clamping strip.

7. The water retaining cofferdam structure for the construction plank road according to claim 1, characterized in that: The reinforcement assembly comprises a triangular support fixed to the lower part of the second support column away from the first support column, and an anchor rod parallel to the second support column is arranged at the bottom of the corner of the triangular support away from the second support column.

8. The water retaining cofferdam structure for the construction plank road according to claim 1, characterized in that: The support assembly includes a fixed shaft, on which four equal-length support rods are rotatably connected. Two connecting seats are arranged from top to bottom on the opposite surface of the first support column and the second support column, and on the opposite surface of the adjacent second support column, and the ends of the support rods are connected to the connecting seats.

9. The water retaining cofferdam structure for the construction plank road according to claim 8, characterized in that: The tops of the four sides of the second support column and the tops of the opposite surfaces of the first support column and the second support column are respectively provided with slots, a support beam is connected between two opposite slots, and the top surface of the support beam contacts the plank board.

10. A construction method for a water retaining cofferdam structure of a construction plank road according to any one of 1 to 9, characterized in that: The steps include: S1: Positioning and laying out, driving a first group of first support columns and second support columns into the riverbed, connecting the first support columns with the second support columns using support components, and installing reinforcement components to reinforce the second support columns; S2: Drive a second group of first support columns and second support columns along the length direction of the positioning line with reference to S1, connect the two second support columns through the support assembly, install the water retaining plate between the first support columns and drive it into the riverbed to form a water retaining cofferdam; S3: Install the plank road slab on the top of the two groups of first support columns and the second support columns to form a water retaining cofferdam serving as the construction plank road.

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