A kind of mixed dam construction method of high concrete gravity dam and a kind of high concrete gravity dam

Abstract

The present invention relates to a high concrete gravity dam hybrid dam construction method with a height exceeding 70 meters and a high concrete gravity dam. For some dam blocks that must be poured with normal concrete, normal concrete is used for pouring, and for the rest that do not have to be poured with normal concrete, And the dam blocks that need to speed up the construction progress are poured with roller compacted concrete; the longitudinal joints between the dam blocks are grouted with a conventional grouting system; the re-opened longitudinal joints are grouted multiple times with a repeated grouting system. In the high concrete gravity dam built by the dam-building method, some dam blocks are normal concrete dam blocks cast by normal concrete, and the rest of the dam blocks are roller-compacted concrete dam blocks cast by roller-compacted concrete. The present invention adjusts part of the dam blocks to roller compacted concrete dams, which meets the on-site requirements for speeding up the construction progress; the joint surface grouting treatment measures adopted by the present invention eliminate the problems caused by the different properties of the concrete used in each dam block and the asynchronous heat of hydration The risk of the longitudinal seams between the dam blocks opening.

Description

technical field [0001] The invention relates to a method for building a high concrete gravity dam with a height exceeding 70 meters and a high concrete gravity dam built by the method. Background technique [0002] Concrete gravity dams are generally divided into normal concrete dams and roller compacted concrete dams. [0003] In general, normal concrete dams with smaller dam heights have smaller dam bottom widths, lower dam body temperature stresses, and less risk of dam cracks, so they are usually poured through warehouses without longitudinal joints. [0004] For high normal concrete dams, the bottom width of the dam is relatively large, such as pouring through the warehouse, the temperature stress of the dam body is relatively high, the pressure of on-site temperature control and crack prevention is relatively high, and the risk of cracks in the dam is relatively high. The body is divided into several upright "columnar blocks", also known as "dam blocks", such as figu...

AI Technical Summary

Problems solved by technology

[0009] The object of the present invention is to propose a high concrete gravity dam mixed dam construction method and high Concrete gravity dam, while ensuring the overall structural safety of the high concrete gravity dam, improve the construction progress of the high concrete gravity dam

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