Concrete dam body drainage blind tube construction method

Abstract

The invention discloses a concrete dam body drainage blind tube construction method. The concrete dam body drainage blind tube construction method comprises the following steps: 1) manufacturing a semi-circular tube according to the design diameter of a drainage blind tube, wherein the length of the semi-circular tube is determined according to the height of a concrete pouring cabin, and the length of the semi-circular tube is 10cm to 20cm higher than a template of the concrete pouring cabin; 2) fixing the semi-circular tube to the inner side of the template according to the design position of the drainage blind tube during construction of a pre-poured dam segment of dam concrete, making the circle center face the template, fixing the lower mouth of the semi-circular tube in a semicircular groove on a poured cabin position of the pre-poured dam segment, reinforcing the upper mouth of the semi-circular tube by iron wire binding with a bolt hole on the template in order to ensure that the semi-circular tube is attached to the template tightly; 3) removing the semi-circular tube while removing the template from the pre-poured dam segment of the dam concrete, and forming a semicircular groove at a structural joint; 4) during construction of a post-poured dam segment, distributing the drainage blind tube in the groove fixedly and firmly, and pouring the concrete to form the drainage blind tube. The concrete dam body drainage blind tube construction method has the advantages of convenience in reinforcing, capability of better keeping the straightness, centering and smoothness of the drainage tube, capability of reducing reinforcing materials, convenience in construction, capabilities of ensuring the quality, increasing the construction speed and shortening the working period, convenience in construction, and capability of ensuring the quality.

Description

technical field [0001] The invention belongs to the technical field of water conservancy and hydropower civil engineering, and in particular relates to a construction method for a concrete dam structure joint drainage blind pipe. Background technique [0002] In the field of water conservancy and hydropower engineering, in order to adapt to the temperature change of the dam body and the uneven settlement of the foundation, the concrete dam is often equipped with permanent structural joints, and vertical drainage pipes are buried upstream in the structural joints to effectively discharge the seepage of the dam body to ensure the normal operation of the dam. For operation, the vertical drainage pipes often use polyethylene microporous corrugated pipes or prefabricated sand-free concrete pipes, etc., and are pre-embedded in sections according to concrete pouring. [0003] Drainage blind pipes in dam structure joints are generally required to be laid across joints. The convent...

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Problems solved by technology

This kind of drainage blind pipe construction method has not been reported in the relevant literature on dam concrete construction at home and abroad.

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