Method for controlling leakage of grouting treatment vertical type asphalt concrete core wall earth-rock dam

Abstract

The invention discloses a method for controlling leakage of a grouting treatment vertical type asphalt concrete core wall earth-rock dam. The method comprises the steps of first collecting, arranging and analyzing dam technical data, and drawing up a grouting range, grouting hole arrangement and grouting curtain body design indexes; carrying out slurry tests and on-site grouting tests; selecting a device according to slurry test results, manufacturing grouting slurry, performing segmentation and row drilling on an upstream transition layer at a dam crest, and sequentially drilling upstream row grouting holes, middle row grouting holes and downstream row grouting holes in the upstream transition layer from one side of an upstream rockfill material dam shell to an asphalt concrete core wall; and finally performing hole sealing treatment after quality inspection. The method has simplicity in arrangement; under the conditions that a reservoir cannot be emptied, the problem of the leakage of the vertical type asphalt concrete core wall earth-rock dam can be effectively solved, the reservoir can run normally, and dam body safety is guaranteed. Engineering project implementation treatment proves that the method is feasible, safe, reliable and good in leakage treatment effect.

Description

technical field [0001] The invention relates to the field of hydraulic structures, in particular to a method for controlling the leakage of vertical asphalt concrete core earth-rock dams through grouting. Background technique [0002] The vertical asphalt concrete core wall has good anti-seepage performance, and has been widely used in earth-rock dams with various heights of asphalt concrete core walls at home and abroad. Concrete base connection. Since the deformation modulus of asphalt concrete is small, the deformation modulus of dam shell material is relatively large. In order to make the deformation transition between the asphalt concrete core wall and the dam shell material smooth, the A transition layer of crushed stone or sand and gravel with a thickness of 1.5-3.0m and a continuous grain distribution is set between them. The maximum particle size of the transition layer should not exceed 80mm, and the content of particles with a particle size of less than 5mm shoul...

AI Technical Summary

Problems solved by technology

In recent years, many asphalt concrete core wall earth-rock dams have leakage problems, and some of them have serious leakage, which endangers the safety of the dam and affects the normal operation of the reservoir. The dam body must be treated for leakage

Because the specific location, distribution and state of the defect pa

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