隔河岩坝基岩体在运行期的弹塑性力学参数反演

BACK ANALYSIS ON ELASTO-PLASTIC MECHANIC PARAMETERS OF ROCK FOUNDATION OF GEHEYAN DAM DURING RUNNING PERIOD

根据隔河岩大坝在运行期的实测位移,运用有限元正交数值试验、回归分析和优化相结合的方法反演了坝基岩体的弹塑性力学参数,为进一步研究高水位作用对岩体力学参数的弱化机制及弱化程度、大坝在极限水位下的安全裕度以及建立大坝工作状态预测模型提供了科学依据。

According to the measured dislacements of Geheyan dam during the running period, the back analysis of elasto-plastic mechanic parameters of its rock foundation is performed with the combination of FEM orthogonal numerical experimentation, regression analysis and optimization. It serves as a scientific ground for further study on weakened mechanism and weakened degree of mechanic parameters of foundation rock, on the allowance degree of safety of dam caused by limiting water level, and on the establishment of forecasting model of the service behavior of dam.