Seepage prevention structure of concrete face rockfill dam

Abstract

The invention discloses a seepage prevention structure of a concrete face rockfill dam. The seepage prevention structure of the concrete face rockfill dam comprises bed rock and a covering layer located on the bed rock, a dam body is arranged on the covering layer and comprises rockfill, and dam transition material, dam bedding material and a face plate are sequentially laid on the slope surface of the rockfill from bottom to top; a foundation abutment wall is arranged at the part, located at the lower end of the face plate, of the upstream side of the dam body in an excavated mode and is provided with a toe board, one side of the top of the toe board makes contact with the face plate, and water stop copper sheets are arranged at the contact part; a seepage prevention board flush with the toe board is arranged on the upstream side of the toe board, and water stop copper sheets are arranged at the joints between the toe board and the seepage prevention board. According to the seepage prevention structure of the concrete face rockfill dam, the stress property of the structure is greatly improved, and the toe board cannot be moved upwards or overturned. Structural construction of the toe board does not interfere with dam filling. Construction is convenient, the construction period is shortened, the engineering cost is lowered, and the project benefit is good.

Description

technical field [0001] The invention belongs to the field of hydraulic and hydroelectric engineering, and in particular relates to an anti-seepage structure of a face rockfill dam. Background technique [0002] The structural form of the existing concrete face rockfill dam generally includes bedrock, a covering layer on the bedrock, a face plate, and a plinth rigidly connected to the face plate, and an anti-seepage plate is poured into the rockfill of the dam body on the downstream side of the plinth . Set a water stop between the toe board and the panel. During construction, the formwork of the anti-seepage board shall be made first, and the poured anti-seepage board shall be filled with rockfill after the poured anti-seepage board reaches the strength requirement, and then the dam cushion material and dam transition material shall be laid on the slope of the dam body, and then the face plate shall be poured. [0003] But there are following problems in prior art: [000...

AI Technical Summary

Problems solved by technology

However, if the connection is anchored, under the thrust load of the face plate, a large stress will be generated at the joint between the toe plate and the anti-seepage plate, which is easy to break. Once broken, the function of the anti-seepage plate to extend the anti-seepage path will be lost. Under high water head , the hydraulic gradient inside the dam body will increase greatly, which is unfavorable to the safety of the dam

[0005] 2. The plinth anti-seepage board structure downstream, because the anti-seepage board extends into the dam body, the anti-seepage board needs to be completed before the dam can be filled, which seriously delays the dam filling period and increases the investment

[0006] 3. During the construction of the bank slopes on both sides, it often brings about the treatment of high and steep slopes, which increases the difficulty of construction, affects the progress of dam filling, prolongs the construction period, and leads to an increase in project costs

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