Double-wall cofferdam with partitioned cabins

Abstract

The invention discloses a double-wall cofferdam with partitioned cabins. The whole cofferdam has a rectangular structure formed by connecting an inner wall board, an outer wall board and a base board, wherein a rectangular annular cavity is formed between the inner wall board and the outer wall board; partitioning boards are arranged in the longitudinal direction and used for partitioning the cavity into a plurality of independent cabins; a plurality of flat linkage inclined rods parallel to the base board are symmetric about the partitioning plates and arranged at the diagonal positions of the adjacent cabins; each cabin has an independent stable structure, so that the stable structure of the whole cofferdam is formed; therefore, the whole cofferdam is rationally stressed and has relatively high compression strength and distortion resistance; and the partitioned cabin type structure replaces the conventional truss structure, so that the assembly and manufacturing process of the cofferdam is simplified, the number of the specifications of the used materials is small, workpieces are uniform and easy to machine, site mounting is facilitated, a large number of truss connection rods are not used, the loss of steel materials is reduced, and the cost is saved.

Description

technical field [0001] The invention relates to an enclosure structure for underwater construction, in particular to a double-wall compartment type cofferdam. Background technique [0002] Cofferdam is a temporary enclosure structure built for the construction of permanent water conservancy facilities in the construction of water conservancy projects. Its function is to prevent water and soil from entering the construction site of the building, so as to drain water in the cofferdam, excavate foundation pits, and build buildings. It is generally used in hydraulic construction. For example, in bridge construction, when the piers and caps are below the surface water level, in rivers with deep water and high flow velocity, wooden sheet piles or steel sheet pile cofferdams can be built, which can not only waterproof and surround water, but also support the foundation The pit wall of the pit, except as a part of the formal building, the cofferdam is generally removed after the c...

AI Technical Summary

Problems solved by technology

[0004] Large-scale cofferdams are usually steel structures with very large volume and weight. They can only be lowered to the design position after being assembled on the construction site. The inner wall and outer wall of the double-walled cofferdam are connected by a truss structure. The number of rods of the truss is huge, and all the rods must be connected with the inner and outer walls of the cofferdam by welding, rivets or pins to fix the inner and outer walls of the cofferdam. The processing and welding workload of the rods is large, and the truss structure is formed Sheets and rods of various specifications are required, and there is often the problem that the rods are misused and need to be dismantled and re-welded, which causes a lot of trouble for on-site assembly, and the truss rods with many specifications and huge quantities require a large amount of processing work and consume materials Large, high cost, resulting in high cofferdam production cost

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