Construction method for large cast-in-situ reinforced concrete water inlet channel

Abstract

The invention relates to a construction method for a large cast-in-situ reinforced concrete water inlet channel. The construction method comprises the following steps: the construction of concrete near the water inlet channel is divided into five main parts, wherein the construction of the concrete around the water inlet channel adopts integral layered casting, the secondary pouring in the traditional casting process is eliminated, and the integration of the concrete around the water inlet channel is ensured; for the parts at which the concrete at the bottom of the elbow of the water inlet channel is not easily vibrated, a vibration guiding device is bound in advance when the parts pass through the bound steel bars, so that the density of the compact at the bottom is realized, and simultaneously a method for combining supporting and pulling is adopted for reinforcing a water inlet channel template. According to the construction method, the condition that a plurality of more complex construction areas are not mutually influenced can be guaranteed, so that the construction period is shortened, the possibility of large-volume concrete cracks is reduced, and the construction accuracy of the whole water inlet channel, the floating deformation resistance of the template in the construction process and the quality of products are better guaranteed. The construction method can be widely applied in construction of the large cast-in-situ reinforced concrete water inlet channel.

Description

technical field [0001] The invention relates to a water inlet construction method. Background technique [0002] The water inlet is a water intake structure built on the raft foundation. The suction port has a rectangular cross-section, and the cross-section gradually narrows toward the water outlet and is bent upwards to form a circle and is connected with the volute. Conventional small-scale water intake structures are simple in shape and small in concrete pouring volume, so the construction method adopted is one-time integral pouring, and it is easier to ensure the quality of concrete forming. The curvature of the elbow section at the bottom of the traditional CP1000 nuclear power plant inlet channel varies greatly, so the construction method of reserving a secondary grouting area at the bottom is generally used, and the non-shrinking grouting material is used for filling in the later stage. If the curvature of the elbow section of the water inlet changes smoothly and t...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a large-scale cast-in-place reinforced concrete water inlet construction method, to solve the technical problem that the traditional construction method of reserving a secondary grouting area at the bottom of the water inlet is unfavorable to the structural integrity and the continuity of the water flow pressure; and Solve the problem of how to ensure the quality of pouring and the anti-floating of the formwork of the water inlet by pouring the concrete around the water inlet at one time

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