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A Construction Method for Cofferdam of Duohe Center Island in Duocha River

A construction method and technology for cofferdams, which are applied in infrastructure engineering, instruments, data processing applications, etc., can solve problems such as poor seepage control conditions, increased seepage water in cofferdams, and impact on the seepage prevention effect of cofferdams on river islands. To achieve the effect of controlling construction costs, improving construction efficiency, and reducing the amount of soil erosion

Active Publication Date: 2021-06-18
SINOHYDRO BUREAU 5
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Problems solved by technology

The covering layer of the river center island is mainly thick humus soil and impact sand, and the anti-seepage condition is poor. If the treatment method is not proper, the seepage of the cofferdam will increase, which will seriously affect the anti-seepage effect of the river center island cofferdam

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  • A Construction Method for Cofferdam of Duohe Center Island in Duocha River
  • A Construction Method for Cofferdam of Duohe Center Island in Duocha River
  • A Construction Method for Cofferdam of Duohe Center Island in Duocha River

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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] Such as figure 1 Shown, a kind of cofferdam construction method of the Duohe center island of Duocha River comprises the following steps:

[0026] Step 1: According to the flood standard of the construction site, establish a cofferdam structure type, and carry out cofferdam construction on both sides of the Chahe River on Hexin Island.

[0027] Step 2: Establish a "parallel-series" hydraulic calculation model of the Chahe River; the "parallel-series" hydraulic calculation model of the Chahe River includes: the hydraulic calculation model of the diversion and decompression canal, the hydraulic calculation model of the cofferdam of the Chahe River; The hydraulic calculation model of the diversion and decompression canal is specifically: the size of the diversion and decompression canal is obtained through the dispersion and inte...

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Abstract

The invention discloses a cofferdam construction method for multiple river center islands in the Duocha River, which includes: establishing the structure type of the cofferdam, establishing a "parallel-series" hydraulic calculation model of the Chahe River; selecting and storing stone materials to complete the encroachment of block stone dikes; Construction of diversion and decompression canals in the upper reaches of the cofferdam of the Chahe River on the Hexin Island; rapid closure of the Chahe River to close the cofferdam of the Chahe River on the Hexin Island; completion of the anti-seepage clay wall at the bottom of the cofferdam foundation of the Hexin Island; filling of the cofferdam of the Hexin Island Weir, complete the first phase of cofferdam. The method effectively improves the construction efficiency of the cofferdam, shortens the construction period, reduces the amount of soil and rock scoured during the construction process, reduces the excavation amount of the covering layer and the amount of clay filling during the construction, and effectively controls the construction cost.

Description

technical field [0001] The invention belongs to the field of cofferdam construction of river courses, in particular to a cofferdam construction method for multiple river center islands in multi-fork rivers. Background technique [0002] Cofferdam refers to the 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 the foundation pit, and build the building. During the construction of the hydropower station, since the main structures of the power station, the spillway, the powerhouse, and the dam are all located in the riverbed, it is necessary to adopt a staged diversion method and use cofferdams to enclose these areas for construction. In the case of too many forks in the river, the traditional construction method requires multiple closure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D19/04G06F30/13G06F30/28G06F113/08G06F119/14
CPCE02D19/04G06Q50/08Y02A10/40Y02A40/22
Inventor 宋建威张奎圣后兵李德刘冠男
Owner SINOHYDRO BUREAU 5
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