Strengthening and repairing construction method for rockfill core wall dam

Abstract

The invention discloses a rock-fill core wall dam reinforcing and repairing construction method, and belongs to the technical field of water conservancy and hydropower construction. A rockfill core wall dam reinforcing and repairing construction method comprises the following steps that S1, a dam crest is dismantled and rebuilt, and the elevation of the dam crest meets the current specification requirement; s2, the subsidence and upheaval parts of the dam slope are repaired, and the appearance quality is recovered; s3, performing high-pressure pulsation grouting on a dam body by adopting controllable composite paste slurry; s4, static pressure grouting is adopted for a main riverbed dam foundation; s5, curtain grouting is adopted for dam foundations and dam abutments on the two banks; s6, curtain grouting is adopted for the foundation along the overflow weir; s7, downstream foot protection is conducted, specifically, reinforcement is conducted, and drainage is recovered; and S8, the leaked spillway discharge chute bottom plate parting seam is subjected to anti-seepage treatment. According to the method, a proper grouting reinforcement method is selected for different dam sections under the condition that the dam body permeability coefficient required by the current specification is met, and the seepage-proofing coefficient of the dam body is improved through the composite grouting reinforcement technology.

Description

technical field [0001] The invention relates to the technical field of water conservancy and hydropower construction, in particular to a construction method for strengthening and repairing a rock-fill core wall dam. Background technique [0002] Rock-fill core earth-rock dams are widely used in today's world because of their advantages such as convenient material acquisition, strong adaptability, flexible construction, simple structure, excellent economy, safety and reliability. Many earth-rock dams have been built in our country, but after long-term operation, these earth-rock dams have experienced varying degrees of aging; the permeability coefficient of the dam body does not meet the requirements of the current code, which directly affects the normal operation. [0003] At present, in order to maintain the original functions of the reservoir, such as flood control, irrigation, breeding, and power generation, the existing reservoir dams are equipped with technologies such ...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems in the prior art that the reinforcement and repair of the dam body is not economical, environmentally friendly, and the construction period is long, and a construction method for the reinforcement and repair of a rock-fill core wall dam is proposed.

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