Concrete face board rock-fill dam bed course area moving boundary wall filling construction technique
A technology for the concrete face and cushion area, which is applied in the construction technology field of moving side walls in the cushion area of concrete face rockfill dams, can solve the problems of many cracks in the concrete face, achieve the improvement of the filling speed of the dam body, and high application value , The effect of reducing the amount of processing work
Inactive Publication Date: 2009-09-02
GUODIAN XINJIANG KAIDU RIVER BASIN HYDROELECTRICITY DEV
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Problems solved by technology
However, when this technology is used for construction, there are many cracks in the concrete panel. Some domestic experts suspect that it is related to the constraint of the panel by the rigid structure of the extruded side wall.
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[0014] 1. Mobile side wall design
[0015] The mobile side walls are designed as reinforced concrete prefabricated walls with a rectangular section. The overall strength of the side wall must meet the requirements of installation and stability under vibration and rolling conditions. The height and width of the side wall are related to the thickness of the layered rolling layer of the cushion material, the rolling parameters and the upstream slope of the cushion area. In actual construction, the height and width of the wall are designed according to the specific construction parameters. The length of the side wall is determined according to the rolling experiment. When rolling, the wall is stable, and the horizontal displacement is not more than 2cm, so as to ensure the compaction of the cushion material. Two lifting lugs are arranged symmetrically on the top surface of the side wall to facilitate lifting and moving. For example: the cushion material thickness is 43cm, the co...
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The construction technology of moving side wall filling in the cushion area of concrete face rockfill dam belongs to a construction technology of filling the cushion area of concrete face rockfill dam in water conservancy and hydropower engineering. In order to reduce the amount of slope surface treatment such as overfilling, slope cutting and slope rolling of traditional filling methods, improve the efficiency of dam filling, shorten the construction period of dam filling; at the same time, overcome the extrusion side wall constraint panel that is not conducive to deformation characteristics; invented the construction technology. The present invention adopts layered slope protection of reinforced concrete moving side wall (see attached drawing), layered rolling under the lateral constraint of side wall slope surface, side wall moving and repeated use, mechanical one-time slope cutting in place, and artificial fine cutting of slope and slope. The surface is trimmed, and then the rolling mortar method is used to protect the slope. The invention is mainly used as a construction technique for filling the cushion area of the face rockfill dam.
Description
Technical field [0001] The invention belongs to a construction technique for filling the cushion area of a concrete face rockfill dam in a water conservancy and hydropower project. Background technique [0002] In a concrete face rockfill dam, the cushion material area is located on the downstream side of the slab, and the upstream slope surface when the dam body is filled is the foundation of the anti-seepage concrete slab of the dam body. This area requires uniformity, stability, low compressibility, high The characteristics of shear strength, whether it is the cushion material or the filling index, have higher requirements, especially the slope compaction index is more stringent; therefore, special attention is paid to the filling of this part in the dam body filling . [0003] In the traditional construction method, the filling of the cushion area is a method of laying materials in layers and compacting. In the slope treatment, an overfill of 30-50cm is adopted. Durin...
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IPC IPC(8): E02D27/40E02D17/20E02B7/06
Inventor 张成龙韦春侠王援生陈洪武何全生王占臣杨伟
Owner GUODIAN XINJIANG KAIDU RIVER BASIN HYDROELECTRICITY DEV