Combined cofferdam construction method
A technology combining cofferdams and construction methods, applied in artificial islands, water conservancy projects, infrastructure projects, etc., can solve problems such as uneconomical and difficult construction of bridge foundations
Active Publication Date: 2009-05-20
CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to solve the problem of uneconomical and difficult construction of the bridge foundation on the upstream side of the embankment
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[0023] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0024] Such as figure 1 ,figure 2, image 3 As shown, the invention provides a kind of combined cofferdam construction method, comprises the following steps:
[0025] A. On the upstream side of the embankment 10, the drilled occlusal piles are constructed according to the design position to form the pile foundation part 1 of the underground diaphragm wall. Pile a is constructed first, and pile b is constructed later. The concrete of pile a is super-retarded concrete, and it is required to complete pile b before the initial setting of the concrete of pile a. Among them, pile a is a plain concrete pile, and pile b is a reinforced concrete pile. The drilled piles at both ends of the drilled occlusal pile are B piles, and the pre-embedded steel plates 7 are installed together with the reinforcement cages of the B piles at both ends of the underground diaphragm wall. Th...
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The invention discloses a combined cofferdam construction method in big dike riverside in bridge foundation engineering, which comprises the following steps: A, bored secant piles are constructed on the big dike riverside to form pile part of underground diaphragm wall, the piles on the two ends of the bored secant pile are mounted with pre-embedded steel plate, and the upper reinforced concrete breast wall is poured; B, steel plate piles on other three sides are inserted to form the combined cofferdam; C, the inside of the cofferdam is dug layer by layer, the inner walls of the top parts of the steel plate piles on the three sides are respectively welded with guide rings which are fixed by a plurality of transverse and longitudinal inner supports, one end of the steel plate pile is welded with the pre-embedded steel plate; D, back cover concrete is poured and the foundation is constructed; and E, after the foundation construction is complete, the inner supports, guide rings, and steel plate piles are removed, and the underground diaphragm wall is left as the permanent protection structure for the big dike. The invention utilizes the underground diaphragm wall as the stable supporting construction for the big dike and as one part of the cofferdam, and satisfies the requirement of water foundation construction in dike protection and bridge construction.
Description
technical field [0001] The invention relates to a cofferdam construction method, in particular to a combined cofferdam construction method on the upstream side of a levee in bridge foundation engineering. Background technique [0002] In the construction of bridge foundations on the upstream side of general embankments in China, dike protection and bridge foundation cofferdams are often considered separately, which wastes costs; and when the bridge foundation invades the embankment revetment, there is difficulty in construction space. Contents of the invention [0003] The technical problem to be solved by the invention is to solve the problems of uneconomical and difficult construction of the bridge foundation on the water-facing side of the embankment. [0004] In order to solve the above technical problems, the technical solution adopted in the present invention is to provide a combined cofferdam construction method, comprising the following steps: [0005] A. On the f...
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IPC IPC(8): E02D19/04E02D29/02
Inventor 秦顺全田继开郑大超刘润泽涂满明刘翠云张爱花江涌姚森张文斌
Owner CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD