Construction method of clay core earth rock cofferdam

A technology of clay core wall and earth-rock cofferdam, which is applied in the direction of basic structure engineering and construction, can solve the problems of core wall compaction, earth-rock cofferdam structure safety hazards and other problems, so as to reduce project cost, optimize design section, eliminate The effect of safety hazards

Inactive Publication Date: 2015-01-07
CHINA GEZHOUBA GRP INT ENG
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Problems solved by technology

No matter what kind of anti-seepage structure is adopted, the structural safety and economy of the earth-rock cofferdam are the key to the structural design. The structural form of the above-mentioned earth-rock cofferdam is relatively economic

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  • Construction method of clay core earth rock cofferdam

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Embodiment Construction

[0023] The invention provides a construction method for an earth-rock cofferdam with a clay core wall, which belongs to the technical field of closure construction of a hydropower station. It is suitable for small rivers in mountainous areas, where the river channel storage capacity is small, the river gradient is large, the inflow is not large, and the riverbed cover layer is not thick (not more than 10m), the clay core wall and earth-rock cofferdam design can be considered to use conduit drainage .

[0024] The invention can reduce the difficulty of excavating the cut-off groove of the anti-seepage structure, can provide dry ground construction conditions for the clay core wall, can improve the filling and rolling quality of the clay core wall, can optimize the design of the section, and is beneficial to reduce the engineering cost. The core wall earth-rock cofferdam construction has created a new construction method.

[0025] The idea of ​​its implementation is: the design...

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Abstract

The invention provides a construction method of a clay core earth rock cofferdam. Considering the situations that the regulation and storage capacity of a small river and a channel in a mountainous area is low, the watercourse gradient is large, the amount of coming water is small, and the watercourse covering layer is not thick (the thickness should not be larger than 10 meters), a guide pipe can be adopted in the design of the clay core earth rock cofferdam for water draining. Thus, the excavating difficulty of a shuting of an impermeable structure can be reduced, the dry construction condition can be provided for a clay core, the construction quality of the clay core can be improved, a design section can be optimized, reduction of the construction cost is facilitated, and a novel construction method is created for construction of the clay core earth rock cofferdam.

Description

technical field [0001] The invention relates to the technical field of closure construction of a hydropower station, in particular to a construction method for an earth-rock cofferdam with a clay core wall. Background technique [0002] Earth-rock cofferdams are widely used in the closure construction process of hydropower projects. Traditional earth-rock cofferdams adopt anti-seepage structures such as inclined wall type, grouting curtain type, vertical anti-seepage wall type, inclined wall with horizontal bedding, and grouting with horizontal bedding Mode. The vertical anti-seepage structure mainly adopts anti-seepage wall, high-spray grouting curtain, anti-seepage wall plus curtain grouting, and clay core wall structure, and the oblique anti-seepage structure mainly adopts clay inclined wall. No matter what kind of anti-seepage structure is adopted, the structural safety and economy of the earth-rock cofferdam are the key to the structural design. The structural form of ...

Claims

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Application Information

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IPC IPC(8): E02D19/04
CPCE02D19/04
Inventor 李建彬刘怀亮朱东如刘明诗
Owner CHINA GEZHOUBA GRP INT ENG
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