Segmented double-layered surrounding-purlin steel sheet pile cofferdam structure

Abstract

The utility model discloses a sectional type double -decked surrounding purlin steel sheet pile cofferdam structure, include: two rows of steel sheet piles, opposite between cofferdam water side and cofferdam backwater side are equipped with, two rows of surrounding purlin system are respectively equipped with in the back of one column steel sheet pile, and the two rows of surrounding purlin system are connected through a plurality of steel pull rod, wherein, two rows surrounding purlin system respectively include multiple surrounding purlin units and fixed steel sheet, and the surrounding purlin unit is connected through a fixed steel sheet between adjacent surrounding purlin unit, the surrounding purlin unit includes: upper layer surrounding purlin, lower layer surrounding purlin and the cross diagonal bracing group connected between upper layer surrounding purlin and lower layer surrounding purlin.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy engineering and foundation pit support technology, and is particularly applicable to deep water cofferdam construction. Specifically, it is a steel sheet pile cofferdam structure with segmented double-layer walers and cross bracing. Background Technology

[0002] In the construction of underwater or water-adjacent structures such as bridges and docks, cofferdams are often needed to block water flow and create a dry working environment. Traditional sheet pile cofferdams typically employ a single-layer monolithic waler structure, which has relatively limited structural strength and stability, and suffers from the following drawbacks:

[0003] 1. Integrated walers are difficult to transport and install, and have poor adaptability;

[0004] 2. Insufficient stiffness of single-layer walers can easily lead to displacement and deformation of sheet piles;

[0005] 3. It lacks an efficient support structure and requires additional bracing or corner bracing, which takes up a lot of space. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model proposes a segmented double-layer waler sheet pile cofferdam structure, which aims to solve the defects of integral walers, such as transportation difficulties and insufficient rigidity.

[0007] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0008] A segmented double-layer waler sheet pile cofferdam structure includes: two rows of sheet piles, oppositely arranged between the upstream and downstream sides of the cofferdam; two rows of waler systems, each located on the back side of one row of sheet piles, connected by several steel tie rods; wherein each row of waler systems includes multiple waler units and a fixed steel plate, and adjacent waler units are connected by a fixed steel plate; each waler unit includes: an upper waler, a lower waler, and a cross bracing assembly connecting the upper and lower walers.

[0009] Preferably, the upper waler and the lower waler are each welded from two back-to-back channel steels, and a fixing steel plate is welded between the two channel steels to maintain a gap between them.

[0010] Preferably, the channel steel has flange plates, and the two ends of the cross bracing assembly are respectively connected to the flange plates corresponding to the upper waler and the lower waler.

[0011] Preferably, the two ends of the steel tie rod pass through the gaps of the two rows of waler systems and are connected by nuts.

[0012] This utility model improves upon the existing integral single-layer waler structure by adopting a segmented double-layer waler structure, which enhances the overall structural rigidity, making the sheet piles less prone to deformation. Furthermore, the overall strength is further enhanced by adding cross bracing groups. The segmented waler structure facilitates transportation. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of the cofferdam according to an embodiment of the present utility model;

[0014] Figure 2 This is a schematic diagram of the waler system of this utility model;

[0015] Figure 3 A three-dimensional view of a waler unit;

[0016] Figure 4 This is a schematic diagram of the three-dimensional structure of the cofferdam. Detailed Implementation

[0017] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0018] See Figure 1 and Figure 4 As shown, the segmented double-layer waler sheet pile cofferdam structure of this embodiment includes: two rows of sheet piles 1, two rows of waler system 2, and steel tie rods 3.

[0019] Two rows of sheet piles 1 are installed opposite each other between the upstream and downstream sides of the cofferdam. A certain distance is maintained between the two rows of sheet piles 1, forming a sheet pile wall. A row of waler systems 2 is installed on the back of each channel of the steel wall. The two rows of waler systems 2 are connected by several steel tie rods 3.

[0020] Combination Figure 2 and Figure 3 As shown, the two rows of waler systems 2 each include multiple waler units 21 and connecting steel plates 22. Adjacent waler units 21 are connected by a connecting steel plate 22. The waler units 21 are manufactured in the factory and transported directly to the construction site in sections, making transportation more convenient. During assembly at the construction site, adjacent waler units 21 are welded together using the fixing steel plate 22.

[0021] The waler unit 21 includes an upper waler 211, a lower waler 212, and a cross bracing assembly 213 connecting the upper waler 211 and the lower waler 212. The upper waler 211 and the lower waler 212 are each welded from two back-to-back channel steels, with a fixing steel plate 214 welded between them to maintain a gap. The channel steels have flanges, and the two ends of the cross bracing assembly 213 are respectively connected to the corresponding flanges of the upper waler 211 and the lower waler 212, forming a complete waler unit. The segmented double-layer waler structure enhances the overall structural rigidity, making the sheet piles less prone to deformation, and further strengthens the overall strength by adding the cross bracing assembly.

[0022] The two ends of the steel tie rod 3 pass through the gaps of the two rows of waler systems and are connected with nuts, which increases the connection between the two rows of steel sheet piles and has a significant effect on maintaining the steel sheet piles from deformation.

[0023] In summary, this utility model effectively prevents sheet pile overturning through a double-layer waler structure design and double protection with diagonal bracing.

[0024] The embodiments described above are for illustrative purposes only and are not intended to limit the scope of this utility model. All equivalent changes and modifications made to this utility model by those skilled in the art should fall within the scope of the appended claims.

Claims

1. A segmented double-layer waler sheet pile cofferdam structure, characterized in that, include: Two rows of steel sheet piles are set opposite each other between the upstream and downstream sides of the cofferdam. Two rows of waler systems are respectively located on the back of a row of sheet piles, and the two rows of waler systems are connected by several steel tie rods; wherein, each of the two rows of waler systems includes multiple waler units and fixed steel plates, and adjacent waler units are connected by a fixed steel plate; the waler unit includes: an upper waler, a lower waler, and a cross bracing group connecting the upper waler and the lower waler.

2. The segmented double-layer waler sheet pile cofferdam structure according to claim 1, characterized in that, The upper waler and the lower waler are each welded together from two back-to-back channel steels, with a fixed steel plate welded between the two channel steels to maintain a gap between them.

3. The segmented double-layer waler sheet pile cofferdam structure according to claim 2, characterized in that, The channel steel has flange plates, and the two ends of the cross bracing group are respectively connected to the flange plates corresponding to the upper waler and the lower waler.

4. The segmented double-layer waler sheet pile cofferdam structure according to claim 2, characterized in that, The two ends of the steel tie rod pass through the gaps of the two rows of walers system and are connected with nuts.

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