Waterstop structure of peripheral joint of rock fill dam with face slab, and construction method

Abstract

The present invention relates to a face-plate rockfill dam peripheral joint sealing structure and its construction method. Said structure has concrete face-plate, toe plate, subzone material and copper water seal. It is characterized by that the copper water seal is made into the í‹FíŒ-shaped form, in the middle of peripheral joint a thick-walled chloroprene rubber rod whose diameter is 70 plus or minus 10 mm is set, its top portion is filled up with SR plastic filler and its surface is covered with chloroprene rubber covering band, and said chloroprene rubber rod is fixed by using galvanized angle steel and galvanized expansion bolt, and the peripheral joint interior is filled up with pine board whose thickness is 12 plus or minus 15 mm.

Description

technical field [0001] The invention relates to a water-stopping structure and a construction method of a peripheral seam of a face rockfill dam. It is suitable for concrete face rockfill dam projects with high water head. Background technique [0002] When the barrage adopts concrete face as the water-retaining and anti-seepage structure, because the face face bears a large water head and the settlement deformation of the rockfill body, the peripheral joints located on the boundary line between the face face and the plinth will produce a large three-dimensional displacement. Therefore, the water seal around the joints is the weakest link in the anti-seepage system of the face dam, which is often easily damaged and becomes a leakage channel, which endangers the operation safety of the dam body. At present, three water stops are generally used for water sealing around the joints of high face rockfill dam projects. For example, the invention patent with the patent number: ZL9...

AI Technical Summary

Problems solved by technology

Since the rubber rod in the middle or the concrete in the lower part of the PVC waterstop is not easy to be poured and compacted, it cannot effectively play its role of waterstop

In some projects, the middle part of the water stop is canceled, and a corrugated plate water stop is added at the bottom of the top plastic filler instead, but the water stop function of the top corrugated plate depends on the reliable connection between the water stop and concrete, and at the same time, the amount of plastic filler is increased.

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