Construction method for rapid underwater repair of leakage cracks of concrete faced rockfill dam and repair structure of construction method

Abstract

The invention discloses a construction method for rapid underwater repair of leakage cracks of a concrete faced rockfill dam. The construction method for rapid underwater repair of the leakage cracksof the concrete faced rockfill dam comprises the following steps in sequence: step 1, washing is carried out from top to bottom along the cracks to ensure that the concrete base surface is washed out;step 2, the concrete base surface is washed again; step 3, even painting of a underwater epoxy cement prime coat is carried out along the cracks from top to bottom; step 4, underwater rapid sealing materials are rolled into a cylindrical shape, the materials are bagged and sent underwater; step 5, the cylindrical underwater rapid sealing materials are pressed tightly along the cracks, and it is guaranteed that the middle is thick and the two sides are thin after pressing; step 6, after a flexible surface protection layer is spread underwater along the cracks, a fixed structure is used for fixing the flexible surface protection layer to the concrete base surface; step 7, after all procedures are completed, the treatment area is checked. The construction method for rapid underwater repair of the leakage cracks of the concrete faced rockfill dam has the advantages of simple materials, rapid construction, and capability of meeting rapid construction requirements during underwater emergency treatment. The invention further discloses a rapid underwater repair structure for the leakage cracks.

Description

technical field [0001] The invention relates to the technical field of concrete face rockfill dams, and more specifically relates to an underwater rapid repair construction method for seepage cracks of face face rockfill dams. The invention also relates to an underwater rapid repair structure for seepage cracks prepared by the construction method for rapid underwater repair of seepage cracks in the face rockfill dam. Background technique [0002] The uncoordinated deformation of the concrete face rockfill dam can easily lead to cracks in the concrete face. The cracks not only affect the durability of the concrete, but also lead to leakage of the dam face in the long-term development, affecting the safety of the dam. [0003] Cracks located above the water surface have been treated in various ways, such as chemical grouting and anti-seepage cover sheet or epoxy mortar covering, or using polyurea coating to seal. However, due to the existence of the water body environment, th...

AI Technical Summary

Problems solved by technology

However, due to the existence of the water body environment, the cracks located under the water are difficult to deal with and the durability is difficult to guarantee

On the one hand, underwater chemical grouting is difficult and costly, and the strength of the grout is greatly affected by the water body; on the other hand, there are generally silt and aquatic attachments on the surface of underwater concrete, which prevents the underwater surface treatment materials from directly adhering to the concrete surface. knot forming seal impermeable

[0004] In recent years, with the research and development of underwater repair materials, the performance of underwater materials has been basically equivalent to that of dry land, but there is no efficient and fast repair structure for emergency treatment of underwater cracks.

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