Back ward water draining system of face plate rock-fill dam dam body and its construction method

A face rockfill dam and reverse drainage technology, which is applied in water conservancy projects, dams, barrages, etc., can solve the problems of affecting the quality of the project, pumping and drainage, inconvenient sealing of holes, and high cost, so as to achieve good response and effective drainage of the dam body and the effect of plugging design

Active Publication Date: 2005-03-02
POWERCHINA HUADONG ENG COPORATION LTD
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AI Technical Summary

Problems solved by technology

Although the hazards of reverse seepage have been recognized at home and abroad, although there are projects with vertical pumping and drainage measures or horizontal drainage pipes on the concrete slab, the pumping and drainage and hole sealing are inconvenient, affecting the quality of the project, or higher cost

Method used

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  • Back ward water draining system of face plate rock-fill dam dam body and its construction method
  • Back ward water draining system of face plate rock-fill dam dam body and its construction method
  • Back ward water draining system of face plate rock-fill dam dam body and its construction method

Examples

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Embodiment Construction

[0022] During the construction period, the reverse drainage system of the concrete face rockfill dam is set up. The system has concrete face 1, toe slab 2, cushion material 3, plot material 4, transition layer material 5, and rockfill material 6. Estimate the design frequency of the dam during the construction period In order to ensure that the seepage water in the dam body can concentrate and effectively seep freely from the drainage holes, a certain distance from the plinth 2 The water collecting body 7 is set in the dam body, and the water collecting body is made of pebbles of a certain volume, and 8 drainage pipes 8 leading to the pebble water collecting body (blind ditch) 7 are arranged from the toe plate 2 of the upstream sump pit 21, and the drainage pipes The vertical section is a perforated steel pipe 8-1, surrounded by a stainless steel filter to prevent clogging of the steel pipe and facilitate smooth drainage; the part passing through the toe plate 2 is an inclined ...

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Abstract

The present invention relates to backward draining system of face plate rock-fill dam body and its construction process, and aims at preventing backward water head caused damage of mat base and concrete plate seam. During construction of the dam, backward draining system is set, which includes water collecting body comprising pebbles in certain volume set inside the dam and in certain distance to the toe board, and water draining pipe connected between the toe board and the water collecting body and comprising vertical section of pored steel pipe, inclined pipe in the toe board and horizontal pipe in between. After finishing the construction, the water draining pipe is blocked. The present invention is used in the concrete face plate dam and asphalt concrete face plate dam engineering under construction.

Description

technical field [0001] The invention relates to a reverse drainage system of a face rockfill dam body and a construction method thereof. It is suitable for concrete face dams and asphalt concrete face dam projects where reverse water head difference may be formed between the upstream and downstream of the surface anti-seepage body during the construction period. Background technique [0002] When the barrage adopts concrete face or asphalt concrete face as the water retaining and anti-seepage structure, based on the characteristics of the dam material partition of the face dam, the ability of the upstream semi-permeable material of the dam body to withstand reverse seepage (seepage pressure) during the construction period is very limited. In some face dam projects in China, the cushion and concrete slope protection surface were damaged, and even the face plate was displaced upstream, resulting in damage to the water sealing system of the surrounding joints. It was very diffi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B7/06E02B8/00
Inventor 陈振文蒋效忠徐建荣郎玲芳郑齐峰
Owner POWERCHINA HUADONG ENG COPORATION LTD
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