A construction method for comb-tooth groove guide and interception of coastal double-row steel sheet pile cofferdam
A technology of steel sheet pile cofferdam and construction method, applied in sheet pile wall, foundation structure engineering, construction, etc., can solve the problems of long construction period and large investment, reduce construction cost, speed up construction speed, reduce the risk of closure and construction effect of difficulty
Active Publication Date: 2017-04-12
浙江省水利水电勘测设计院有限责任公司
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Problems solved by technology
The main problems of this construction method are: under the condition that the coastal area is affected by tidal water, due to the lack of diversion coordination, there are great risks and difficulties in the construction of sub-dyke closures, and it is necessary to wait for the construction of sub-dykes to be completed before carrying out double-row steel sheet pile enclosing Weir interception construction, and finally the sub-dike will be removed, the construction period is long and the investment is large
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[0026] The construction method of comb-tooth groove guide and interception of a coastal double-row steel sheet pile cofferdam of the present invention will be described below in conjunction with the accompanying drawings.
[0027] In the embodiment of the present invention, the overall layout of the double-row steel sheet pile cofferdam is a circular layout, the total length of the cofferdam axis is about 1500m, and the total area of the surrounding foundation pit is about 140,000m 2 . In the interception process of the double-row steel sheet pile cofferdam, a dragon mouth is set, and the length of the dragon mouth is 30m. By setting up the diversion chamber, the inner and outer flow passages of the foundation pit are opened, the water level inside and outside the foundation pit and the water flow velocity of the Helonglongkou are reduced, and the smooth closure of the double-row steel sheet pile cofferdam is effectively guaranteed.
[0028] The concrete construction method...
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The invention provides a comb teeth trench type division and closure construction method of a double-row steel sheet-piled cofferdam of a coast. According to the technical scheme, the method comprises the following steps: a, determining the location and prepared width of a closure gap; b, constructing all double-row steel sheet-piled cofferdams, excepting the double-row steel sheet-piled cofferdams at the outsides of a closure chamber and a division chamber; c, constructing a steel sheet-pile wall of the division chamber and a diaphragm steel sheet-pile wall; d, cutting the steel sheet-pile wall of the division chamber at intervals of one or a plurality of steel sheet piles; e, pulling up the division chamber, and cutting an upper part structure of the steel sheet pile to form a comb teeth trench flowing channel; f, constructing a steel sheet-pile wall of the closure chamber; g, cutting the division chamber, and inserting back an upper component of the steel sheet pile. According to the method, the characteristics of the structure of the double-row steel sheet-piled cofferdam is fully utilized to solve the problem of division in the closure of the double-row steel sheet-piled cofferdam, and the cofferdam closure risk and the construction difficulty can be reduced; secondary cofferdams cannot be additionally constructed during the closure of the double-row steel sheet-piled cofferdam, so that the cofferdam construction is sped up, and the total cost of the cofferdam can be decreased.
Description
technical field [0001] The invention relates to a cofferdam closure construction method in the field of construction engineering, in particular to a coastal double-row steel sheet pile cofferdam closure construction method. Background technique [0002] At present, double-row steel sheet pile cofferdams will be used in the construction of coastal areas in Zhejiang, Shanghai, Guangdong and other places. The double-row steel sheet pile cofferdam is formed by connecting multiple U-shaped steel sheet piles with locks on both sides to form two rows of steel sheet pile walls, and backfilling sand or soil between the two rows of steel sheet pile walls. The cofferdam has the advantages of stable structure, small footprint, fast construction speed, green environmental protection and investment saving. [0003] During the construction of the double-row steel sheet pile cofferdam, in order to speed up the construction progress, two construction teams or multiple teams are required for...
Claims
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IPC IPC(8): E02D19/04E02D5/04
CPCE02D5/04E02D19/04E02D2250/0061
Inventor 吴留伟郑国兵徐轶慷胡能永吴蕾施立军沈贵华袁文喜彭银生谢磊
Owner 浙江省水利水电勘测设计院有限责任公司