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

A construction method and gravity dam technology, applied in gravity dams, earthwork drilling, drilling equipment and methods, etc., can solve problems such as failure to repair defects, and achieve fast construction speed, low cost, and high construction accuracy Effect

Active Publication Date: 2008-09-24
SINOHYRDO ENG BUREAU 3 CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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

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Embodiment

[0053] The heightening of a certain dam is one of the important components of the water source project of the South-to-North Water Diversion Middle Route. It is located about 800m downstream of the confluence of the main stream and the tributaries, and the controlled drainage area is 95,200km 2 . The water conservancy complex is composed of earth-rock dams on both banks, concrete dams, ship lifts, power stations and other buildings. The initial project was completed in 1973. The normal water storage level is 157m and the dam crest elevation is 162m. The dam body below the elevation of 100m in the riverbed section has been built according to the normal water storage level of 170m after the heightening of the dam. After the dam is heightened, the main tasks of the reservoir are flood control, water supply, power generation and shipping. After the heightening of the dam, the normal storage level of the reservoir is 170m, the elevation of the dam crest is 176.6m, and the total st...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B7/10E21B7/00B28D1/14
Inventor 李东锋潘纪良
Owner SINOHYRDO ENG BUREAU 3 CO LTD
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