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非均质地基上高拱坝应力分析是目前坝工设计中的一个重要而又复杂的问题。本文介绍了国內某大型重力拱坝光弹性整体模型试验研究实例,其中包括变弹模组合模型浇制、水砂压荷载模拟及主要试验成果,分析了在水压和泥砂压力作用下非均匀基础上高拱坝的受力特点和工作状态,论述了基础弹模变化和不对称性以及局部低变模区的存在对坝体应力的影响。
Stress analysis of high arch dams on heterogeneous foundations is an important and complex issue in current dam design. This paper introduces a case study of a photoelastic overall model test for a large-scale gravity arch dam in China, including the casting of a variable elastic-molded model, simulation of hydraulic sand load and major test results, and analysis of non-uniformity under hydraulic pressure and muddy sand pressure. Based on the stress characteristics and working conditions of high arch dams, the effects of the changes and asymmetries of the base elastic modulus and the presence of local low-modulus areas on dam stress were discussed.