基于岩体质量分级的岩体变形特性研究

坝基和坝肩岩体的变形特征是影响大坝施工工艺和大坝能否长期稳定的重要因素之一。为合理确定叶巴滩水电站岩体的变形模量,基于岩体质量分级,进行了室内试验和现场刚性承压板试验。通过数理统计分析,结合岩体质量及其所处地质环境给出岩体变形参数建议值,并用声波对变形试验结果进行拟合,得到其相关系数大于0.83,即证实了实验成果的合理性。

Study on rock mass deformation characteristics based on classification of rock mass quality

The long-term stability of the dam and the dam construction technique is affected by the rock mass deformation characteristics of the dam foundation and abutment. To determine the reasonable rock mass deformation modulus of Yebatan Hy-dropower Station, the laboratory test and the in-situ rigid bearing plate test were introduced based on the rock mass quality clas-sification. Firstly, through mathematical statistics analysis, the recommended values of rock mass deformation parameters are giv-en in consideration of geological environment and rock mass quality. Then, the deformation test results are fitted by sound wave with a correlation coefficient larger than 0. 83, so the rationality of the experimental results has been proved.