Parting water-stop design method of concrete cast-in-situ diaphragm wall of deep overburden layer dam foundation

A technology of deep covering layer and design method, which is applied in water conservancy projects, underwater structures, infrastructure projects, etc., can solve the problems of poor anti-seepage effect and leakage of anti-seepage panels, so as to improve the anti-seepage effect and improve the The effect of service life and simple and convenient construction and operation

Inactive Publication Date: 2014-07-16
YELLOW RIVER ENG CONSULTING
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AI Technical Summary

Problems solved by technology

For low dams (below 30 meters in height), crease joints are used instead of water-stopping facilities in the joints, and the joint surfaces between the joints are chiseled; Seepage panels leak at joints

Method used

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  • Parting water-stop design method of concrete cast-in-situ diaphragm wall of deep overburden layer dam foundation
  • Parting water-stop design method of concrete cast-in-situ diaphragm wall of deep overburden layer dam foundation

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Embodiment Construction

[0013] Such as figure 1 , 2 As shown, in the design method for seam sealing of concrete cast-in-place cut-off walls of deep overburden dam foundations according to the present invention, the first step is to set the vertical joints between adjacent concrete cast-in-place cut-off walls 1 and 2 as broken lines seam, the fold line seam is a "convex"-shaped structure along the thickness h direction of the cut-off wall, and the construction chisels are carried out between the seams;

[0014] The second step is to vertically set the water-stop copper sheet 4 (1.2mm thick copper sheet) with a "W" cross-section at the position where the fold line seam is located at the axis 3 of the cut-off wall, and then compound it with GB material with a length of 100mm and a thickness of 6mm The plate 5 is glued to both sides of the water-stop copper sheet 4; at the same time, fill the φ25mm neoprene rod 6 in the convex body cavity in the middle of the water-stop copper sheet 4, and fill it with ...

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Abstract

The invention discloses a parting water-stop design method of a concrete cast-in-situ diaphragm wall of a deep overburden layer dam foundation. The method comprises the steps that firstly, a perpendicular linkage joint between adjacent sections of the concrete cast-in-situ diaphragm wall is arranged as a fold line joint of a structure shaped like a Chinese character 'tu', and construction scabbling is conducted on the joint; secondly, a copper water-stop plate with the section being of a W-shaped structure is arranged at the position, located on the axis of the diaphragm wall, of the fold line joint, wherein the copper water-stop plate is perpendicular to the fold line joint, and a middle convex body cavity of the copper water-stop plate with the section being of the W-shaped structure is filled with a chloroprene rubber bar; thirdly, a GB three compound rubber water-stop plate is attached to the upstream side of the vertical linkage joint of the adjacent sections of the concrete cast-in-situ diaphragm wall, fixed through stainless steel expansion bolts, and then brushed with 3 mm emulsified asphalt in a covered mode. The method has the advantages that the service life of the concrete cast-in-situ diaphragm wall is prolonged.

Description

technical field [0001] The invention relates to a face-face dam or an earth-rock dam foundation anti-seepage wall with a deep overburden layer, in particular to a design method for joint water-stopping of a concrete cast-in-place anti-seepage wall for a deep overburden dam foundation. Background technique [0002] Concrete cut-off walls are often chosen as one of the main measures in anti-seepage of high-face dams with deep overburden layers or foundations of earth-rock dams. During construction, the slotted anti-seepage wall is driven into the covering layer and inserted into the bedrock. At the joint between the top of the slotted anti-seepage wall and the toe board or connecting plate of the face dam, it is necessary to construct a concrete anti-seepage wall to ensure its tightness. Connection, in order to prevent water penetration under the action of high water head. Since the cast-in-place anti-seepage wall is constructed in sections, vertical joints need to be constru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/16
Inventor 李远程邢建营姜苏阳李泽民崔莹姚帅强
Owner YELLOW RIVER ENG CONSULTING
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