Deep water combined steel sheet pile cofferdam construction method

A technology combining steel sheet piles and construction methods, which is applied in infrastructure engineering, construction, etc., can solve the problems of high construction cost, small space, and large processing volume, and achieve the effect of solving the problem of being unable to install and reducing the difficulty of installation

Active Publication Date: 2017-07-14
CCCC SECOND HARBOR ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Part of the first support method has high requirements on the verticality of the casing, and at the same time requires large-scale lifting equipment such as floating cranes to cooperate with the installation, which is not suitable for lifting restricted waters, and the construction cost is high
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  • Deep water combined steel sheet pile cofferdam construction method
  • Deep water combined steel sheet pile cofferdam construction method
  • Deep water combined steel sheet pile cofferdam construction method

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Example Embodiment

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] like Figure 1~3 , the cofferdam structure of this embodiment includes a steel casing 1, steel sheet piles 2, purlins 3, and an internal support structure. The steel sheet piles 2 of this embodiment rely on the guiding structure on the steel casing 1 for insertion and driving. The guiding structure is as in the patent The guide device described in the patent No. "201521102607.7" inserts and drives the steel sheet pile 2 through the guide structure on the steel casing 1, so as to prevent the steel sheet pile 2 from being accurately and quickly installed without the purlin 3 as a guide support.

[0024] The purlin 3 of this embodiment is split into several parts. For a square cofferdam, the purlin 3 is generally divided into four separate straight rod-shaped structures, and the purlin 3 is hoisted to the The sub-block hoisting o...

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Abstract

The invention relates to the technical field of steel sheet pile cofferdam construction, in particular to a deep water combined steel sheet pile cofferdam construction method. The method comprises the steps that steel casings are inserted and driven into a cofferdam construction area; bearing structures are arranged in the positions, corresponding to enclosure purlin mounting positions, of steel sheet piles; the steel sheet piles are inserted and driven by relying on the steel casings to form a cofferdam structure in an encircling mode; enclosure purlins are sequentially hoisted onto the bearing structures on the inner sides of the steel sheet piles from bottom to top; water in the cofferdam is pumped layer by layer, and inner supports of the enclosure purlins are mounted layer by layer from top to bottom; and after all the inner supports are mounted, concrete is poured into the cofferdam to form a bearing platform structure. According to the method, corbels are arranged for the steel sheet piles in advance to realize in-place arrangement of the enclosure purlins in advance; through the construction method of conducting water pumping after bottom sealing, integral connecting of the enclosure purlins, and subsequent installation of the inner supports, adverse influences caused by existence of the steel casings, the upper-layer enclosure purlins and the inner supports on the operating space are avoided, the problem that large enclosure purlins cannot be installed is solved effectively, and the installation difficulty of the inner supports during the later period is lowered.

Description

technical field [0001] The invention relates to the technical field of steel sheet pile cofferdam construction, in particular to a deep-water composite steel sheet pile cofferdam construction method. Background technique [0002] Sheet pile cofferdams are usually composed of three major elements: sheet piles, purlins, and internal supports. The three elements work together to meet the environmental requirements for dry construction of deepwater caps. There are many supporting layers in the deep-water steel sheet pile cofferdam, which often leads to complex construction system conversion. To solve this problem, the commonly used construction methods of cofferdams in water include partial first branch method and full back branch method. Invention CN102926387A discloses a steel sheet pile cofferdam underwater purlin installation guide device and positioning method, that is, the partial first support method, using the steel casing to set the guide and lower the steel purlins la...

Claims

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Application Information

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IPC IPC(8): E02D19/04
CPCE02D19/04E02D2300/0029
Inventor 胡义新黄成伟周舒杜松刘宁波李送根王路张成林卢佩
Owner CCCC SECOND HARBOR ENG
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