高心墙堆石坝的极限抗震能力研究  

Research on the maximum anti-seismic capability of high earth core rock-fill dam

作　　者：赵剑明[1] 刘小生[1] 陈宁[1] 常亚屏[1] 刘启旺[1] 王宏[1] 

机构地区：[1]中国水利水电科学研究院,北京100048

出　　处：《水力发电学报》2009年第5期97-102,共6页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金委员会和二滩公司雅砻江联合基金(50639060);;水利部"948"项目(200929)

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。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.

关 键 词：水工结构 极限抗震能力 三维真非线性动力有限元法 心墙堆石坝 坝坡稳定性 地震残余变形 

分 类 号：TV312[水利工程—水工结构工程]