【摘要】 针对强震区高心墙堆石坝的特点,在对高土石坝进行三维真非线性有效应力地震反应分析的基础上,提出了一套高土石坝极限抗震能力的研究方法。结合两河口工程,从稳定、变形、防渗体安全等方面对两河口高心墙堆石坝的极限抗震能力进行了研究和分析。根据坝坡稳定性、地震残余变形、液化可能性、单元抗震安全性及防渗体安全等多角度的评价结果,初步认为两河口高心墙堆石坝的极限抗震能力为0.45g~0.50g。更多还原

【Abstract】 An analysis method is proposed to evaluate the maximum anti-seismic capability of high earth core rock-fill dam.The method is based on the 3D authentic nonlinear effective stress dynamic analysis,and the conditions of strong earthquake are considered.The focus is on the decisive factors of the seismic safety,stability,deformation and safety of the impervious core.The method was successfully applied to the Lianghekou dam.A comprehensive analysis on the calculations of the dam slope dynamic stability,the earthquake-induced permanent deformation,the liquefaction potential,the element anti-seismic safety as well as the sand seismic safety of impervious core,indicates the maximum anti-seismic capability of this dam is 0.45g～0.50g.更多还原