混凝土重力坝抗滑稳定实时分析方法

Real-time anti-sliding stability analysis method of concrete gravity dam

针对混凝土重力坝现有抗滑稳定分析方法不能满足实时分析的现状,提出了抗滑稳定实时分析方法,该方法以位移监测数据为基础,得到位移时效分量与坝体抗滑性态相关的结论。在深入探讨位移时效分量具有的特征之后,给出了位移时效分量的通用拟合表达式,以此为基础构建了对混凝土重力坝抗滑稳定进行实时分析的模型及其失稳判据。用所提出的方法对某重力坝坝段的抗滑稳定进行实时分析,其计算结果与刚体极限平衡法等传统方法一致,证明了该方法的有效性。

Aiming at the defect of present anti - sliding stability analysis method for concrete gravity dam that real - time calculation can not be realized, we propose a real - time anti - sliding stability analysis method for concrete gravity dam, which is based on the monitoring data of displacement, and it is found that the time dependent displacement is related with the anti - sliding state of concrete gravity dam. The feature of time dependent displacement is discussed, and a general fitting expression for time dependent displacement is provided, based on which, the real - time analysis model and instability criterion of concrete gravity dam are established. The proposed model is applied to conduct a real - time anti - sliding analysis for a gravity dam section, and it is illustrated that the results are in good consistency with the results obtained by rigid limit equilibrium method, verifying its effectiveness.