Large area sawed joint cutting construction method of concrete gravity dam cross joint

Abstract

The invention discloses a concrete gravity dam transverse joint large area sawing and cutting construction method which consists two parts of drilling and cutting; the construction method is carried out according to the following steps: selecting a full hydraulic drill as a drilling tool; confirming the drilled parameters; drilling and fetching the core; cataloging the fetched rock core; measuring the hole deviation of drilling; selecting a diamond wire saw to sew and cut; the cutting method, selecting horizontal drilling to finish the transverse joint cutting of the dam, selecting a diamond rope and confirming the cutting parameters; the linear speed of cutting should reach 18m / s to 22m / s; the cutting washing liquid pump amount at least reaches 70L / min, then the dam can be under a normal running state; the sawing construction does not affect the dam to run safely, does not damage the dam body structure, does not damage the transverse joint of the dam body to stop water, has a low cost, has a fast construction speed, has a high construction precision and can be broadly applied in the reinforcing and alternation constructions of the old dams and disabled dams in the engineering fields of water conservancy and hydropower.

Description

technical field [0001] The invention relates to a large-area cutting construction technology for water conservancy and hydropower projects, in particular to a large-area sawing and cutting construction method for transverse joints of concrete gravity dams. Background technique [0002] In the demolition and reconstruction of industrial and civil buildings, it is very common to use high-power diamond circular saws or diamond chain saws to cut concrete, and the construction technology is relatively mature. The cutting objects in industrial and civil construction are generally concrete slabs, beams, columns and other components. The cutting area is small, the construction difficulty is low, and the construction environment is relatively ideal. However, there is no precedent for large-scale cutting of concrete in water conservancy and hydropower projects. The turning dam section of the concrete dam on the right bank of the project (consisting of 6 individual dam sections) is in ...

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Problems solved by technology

[0003] According to the investigation, the large-area sawing and cutting construction of the concrete gravity dam transverse joints in this project is the first time at home and abroad. If the existing concrete cutting technology is used, the purpose of defect repair will not be achieved.

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