Construction method of gravity dam heightening structure with limited combination of rear upper

Abstract

The invention discloses a construction method of a gravity dam heightening structure with limited combination of a rear upper. The method comprises interface processing, structure processing and temperature control processing. By means of interface treatment, structure treatment and temperature control treatment measures, the gravity dam heightening structure with the limited combination of the rear wall is formed, a certain combination proportion is achieved between an old dam body and a new dam body, and it is guaranteed that the effect of combined stress is achieved between the old dam body and the new dam body. The problem that the new dam body and the old dam body are difficult to connect into a whole or completely separate when the dam is heightened is solved; the method has the advantages that the old dam body and the new dam body are combined in a certain proportion, and the effect of combined stress between the old dam body and the new dam body can be guaranteed.

Description

technical field [0001] The invention relates to the field of water conservancy engineering construction in civil engineering, and more specifically relates to a construction method for heightening a structure with a limited rear side combined with a gravity dam. Background technique [0002] With the development of society and economy, the problem of water resources is becoming more and more prominent, and there are more and more projects that need to be raised twice or more times to meet the actual needs of the dams that have been built at home and abroad. According to statistics on the heightening of dams at home and abroad, the commonly used methods for heightening gravity dams are: integral rear support, separated rear support, integral front support, front support and rear support, prestressed anchor cable heightening and There are six types of dam crest heightening directly. [0003] Among the many heightening methods of gravity dams, the integral and separated height...

AI Technical Summary

Problems solved by technology

Due to the large thickness and high stiffness of the dam body, it is often expensive to take engineering measures to connect the old and new dam bodies into a whole or completely separate them

[0004] In addition, the heightening project of a dam in the midline water source of the largest heightening project in China, the preliminary design intends to adopt the integral type of rear wall for heightening, but field tests and simulation calculations have found that due to local climate conditions, the gap between the old and new dam It is difficult to connect as a whole by taking conventional engineering measures

[0005] Therefore, it is necessary to develop a gravity dam heightening structure that solves the problem that the old and new dams are difficult to be connected as a whole or is completely separated, and that ensures the effect of joint stress between the old and new dams

Images