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对高应力状态下粗粒料抗剪强度的线性和非线性强度理论进行了讨论,指出了基于线性强度指标在粗粒料坝坡稳定性分析中的不足之处,并探讨了非线性抗剪强度的表达及其计算参数的取值.在此基础上,对非线性抗剪强度在坝坡稳定性分析中的应用进行了研究,给出了迭代算法,编制了能考虑非线性抗剪强度的坝坡稳定性分析程序,提出了迭代计算精度的控制标准,并对潘口面板堆石坝临时度汛断面的坝坡稳定性进行了计算研究.研究表明,粗粒料坝坡稳定性分析中应采用非线性抗剪强度指标.
The theory of linear and nonlinear strength of coarse aggregate in high stress state is discussed. The disadvantages of linear strength index in the stability analysis of coarse aggregate slope are pointed out. The nonlinear shear resistance The expression of the strength and the value of its calculation parameters.On this basis, the application of nonlinear shear strength in the stability analysis of dam slope is studied, and the iterative algorithm is given, and the nonlinear shear strength The control standard of iterative calculation precision is put forward and the stability of dam slope of temporary flood control section of Pankou face rockfill dam is calculated and studied.The research shows that the stability analysis of coarse graded dam Should be used in non-linear shear strength index.