高碾压混凝土拱坝中的构造缝问题研究

Study on the structural joints in the high RCC arch dam

为了控制施工期温降引起的坝体裂缝，国内外已建成的几座碾压混凝土拱坝普遍设置了诱导缝。我国在国家“八五”科技攻关过程中深入研究了诱导缝的作用和合理布置问题，提出了诱导缝等效强度计算模型和断裂判别式以及有效作用范围估计方法，为诱导缝设计提供了理论依据，并对高碾压混凝土拱坝设置少量横缝的作用和适用条件提出了依据。

In order to control the dam cracks caused by the temperature drop during construction period, the induced joints are generally arranged in some constructed RCC arch dams at home and abroad. Through the deeply study on the functions and rational layout during the Eighth Five Year Plan period,the calculation model of equivalent strength, the cracking identification and the assessment method of effective acting range of induced joint have been put forward, which provides the theoretical basis for the design of induced joint and also for the functions and the adaptable conditions of the transverse joint which is arranged in high RCC arch dam.