C-C type interlocking steel pipe pile cofferdam and construction method

Abstract

The invention discloses a C-C type interlocking steel pipe pile cofferdam and a construction method. The cofferdam is encircled by a plurality of C-C type interlocking steel pipe piles which are closely connected in sequence, wherein each C-C type interlocking steel pipe pile comprises a vertical steel pipe as well as a male lock catch and a female lock catch which are distributed at the outer side of the vertical steel pipe, and each two adjacent vertical steel pipes are connected through an interlocking structure composed of the corresponding male lock catch and female lock catch; and each interlocking structure is internally densely filled with an interlocking filling structure, and each interlocking filling structure comprises a cloth bag, heating resistance wires distributed in the cloth bag, and a mortar filling structure formed by sulphur mortar filled in the cloth bag. The construction method comprises the following steps: 1. surveying and setting out; 2. steel pipe pile inserting piling and closure construction; 3. interlocking structure filling; 4. cofferdam construction completion; and 5. cofferdam removal. The cofferdam disclosed by the invention is reasonable in design, simple and convenient to disassemble and assemble, safe and reliable, good in water-stopping effect, and capable of effectively achieving the engineering purposes of interlocking connection, water-stopping and rapid removal of the steel pipe pile cofferdam.

Description

technical field [0001] The invention belongs to the technical field of underground engineering construction, and in particular relates to a C-C type locking steel pipe pile cofferdam and a construction method. Background technique [0002] Locked steel pipe pile cofferdam is a temporary structure used in the construction of underground projects with water. Using the greater rigidity and bending resistance of steel pipe piles, the foundation pit excavation cofferdam structure is formed through the lock connection. The project provides a safe and water-free working space. The reliability of the connection form of the lock and a good water-stop effect are the keys to the quality control of the construction quality of the steel pipe pile cofferdam at the lock. At present, the commonly used locking forms of steel pipe piles are mostly C-O, C-I and []-Ι. Water measures are often filled with clay, sawdust, cotton cloth and other methods, and the water-stopping effect is not very g...

AI Technical Summary

Problems solved by technology

At present, the commonly used locking forms of steel pipe piles are mostly C-O, C-I and []-Ι. Water measures are often filled with clay, sawdust, cotton cloth, etc., and the water-stopping effect is not very good

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