岩体变形参数渐变取值模型及工程应用

分析了当前岩体现场试验、变形参数取值和常规计算模式存在的问题。针对河谷、斜坡岩体从表部到深部 ,岩体风化、岩体波速和岩体地应力等彼此均呈现渐变性特征 ,提出了岩体变形参数渐变取值模型 ,并以黄河上游李家峡水电站初期蓄水监测资料 ,论证了岩体变形参数空间上连续性渐变取值的合理性和科学性 ,对今后其它岩体工程的力学参数取值和计算模型的概化提供了指导意义.

APPLICATION OF PROGRESSIVELY CHANGING ROCK MASS DEFORMATION PARAMETERS TO ROCK MASS ENGINEERING

The problems existing in rock mass in-situ test, in present selection of deformation parameter, and in conventional compution model are analyzed. Based on the weathering, wave velocity and ground stress of rock masses having their progressive changes from superficial to deep part, a selection of the proggressively changing rock mass deformation parameter is presented. The displacement values monitored during the time of initial impoundment of the reservoir of Lijiaxia Hydropower Station in the upstream of Yellow River prove the reasonableness of the selection of progressively changing rock mass deformation parameters in space. The result is of realistic guiding significance for selection of mechanical parameters and the generalization of compution model in other rock mass engineering projects in the future.