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混凝土坝出现裂缝是一个普遍问题,如何控制已有裂缝不致发展成为灾害性裂缝,危及坝体的安全,是理论上和实践中十分重大的课题。陈村拱坝的上下游坝面、坝顶和廊道内都存在裂缝,其中下游坝面105米高程附近的水平裂缝(下简称105裂缝)最为严重,引起人们的关注。本文以实测资料、回归分析结果和有限元计算值为依据,结合坝体结构特点,试对105裂缝的发生、发展和危害情况,作定性和定量的分析研究,并提出一些看法,供有关同志参考。
Cracks in concrete dams are a common problem. It is a very important issue both theoretically and practically in how to control existing cracks not to develop into catastrophic cracks and endanger the safety of dams. There are cracks in the upstream and downstream dam faces, crest and corridor of the Chencun Arch Dam, of which the horizontal cracks near the elevation of 105 meters on the downstream dam surface (hereinafter referred to as 105 cracks) are the most serious ones, arousing people’s attention. Based on the measured data, the results of regression analysis and the calculated values of finite element, combined with the structural characteristics of the dam, this paper tries to make qualitative and quantitative analysis on the occurrence, development and damage of 105 cracks, and puts forward some suggestions for the relevant comrades reference.