Construction method of waterstop structure of peripheral joint of rock fill dam with face slab

A concrete face rockfill dam and construction method technology, applied in water conservancy projects, dams, barrages, etc., can solve the problems of increasing the amount of plastic filler, concrete is not easy to pour and compact, and can not effectively play the role of water stop, so as to improve the inconvenience of construction, good response effect

Active Publication Date: 2008-04-23
POWERCHINA HUADONG ENG COPORATION LTD
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  • Abstract
  • Description
  • Claims
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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.

Method used

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  • Construction method of waterstop structure of peripheral joint of rock fill dam with face slab
  • Construction method of waterstop structure of peripheral joint of rock fill dam with face slab
  • Construction method of waterstop structure of peripheral joint of rock fill dam with face slab

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Embodiment Construction

[0015] First calculate the total settlement value of the dam body during the construction period and operation period and the three-dimensional displacement value of the peripheral joints, based on which the water-stopping form of the surrounding joints is rationally designed. In this example, three water-stopping structures are used: the bottom F-shaped water-stopping copper sheet, Thick-walled neoprene rods in the middle, SR plastic packing at the top, and fly ash water stop outside the low-elevation plastic packing. Such as figure 1 , image 3 As shown, when pouring the concrete plinth 2, the F-type water-stop copper sheet 5 is pre-embedded. In order to prevent the cushion rockfill from scratching the water-stop copper sheet, a layer of 20cm thick asphalt graded sand 4 is placed under the water-stop copper sheet. And pad it with neoprene gasket 7 (250×4mm). Put a φ 20mm thin rubber rod 15 into the nose of the water-stop copper sheet and fill it with foam plastic 6 to prev...

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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 ''F''-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 construction method of a water-stop structure for 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: ZL98120...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B3/16E02B7/06
Inventor 陈振文汤旸彭育高礼洪
Owner POWERCHINA HUADONG ENG COPORATION LTD
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