高心墙堆石坝的极限抗震能力研究
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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.
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.
引文
[1]赵剑明,汪闻韶,常亚屏,陈宁.高面板坝三维真非线性地震反应分析方法及模型试验验证[J].水利学报,2003,(9):12~18.ZHAO Jianming,WANG Wenshao,CHANG Yaping.3-D authentic nonlinear dynamic analysis method of high CFRD and verification bymodel test data[J].Journal of Hydraulic Engineering.2003,(9):12~118.(in Chinese)
[2]赵剑明,汪闻韶,张崇文.土石坝振动孔压影响因素的研究[J].水利学报,2000,(5):54~59.ZHAO Jianming,WANG Wenshao,ZHANG Chongwen.Study on influence factors of seismic pore water pressure in earth-rock dams[J].Joumal of Hydraulic Engineering.2000,(5):54~59.(in Chinese)
[3]汪闻韶,金崇磐,王克成.土石坝的抗震计算和模型试验及原型观测,水利学报,1987,(12):1~16.WANG Wenshao,JIN Chongpan,WANG Kecheng.Aseismatic calculation,model test and prototype experiments and field monitoring ofearth-rock dam[J].Journal of Hydraulic Engineering.1987,(12):1~16.(in Chinese)
[4]赵剑明,常亚屏,陈宁.高心墙堆石坝地震变形与稳定分析[J].岩土力学,2004,25(s2):423~428.ZHAO Jianming,CHANG Yaping,CHEN Ning.Study on earthquake-induced permanent deformation and dynamic stability of high corerock-fill dam[J].Rock and Soil Mechanics.2004,25(s2):423~428.(in Chinese)
[5]中国水利水电科学研究院.两河口水电站心墙堆石坝坝料动力特性试验研究报告[R].2008.6.China Institute of Water Resources and Hydropower Research.Rock-fill materials dynamic properties research reports of Lianghekou earthcore rock-fill dam[R].2008.6.(in Chinese)
[2]赵剑明,汪闻韶,张崇文.土石坝振动孔压影响因素的研究[J].水利学报,2000,(5):54~59.ZHAO Jianming,WANG Wenshao,ZHANG Chongwen.Study on influence factors of seismic pore water pressure in earth-rock dams[J].Joumal of Hydraulic Engineering.2000,(5):54~59.(in Chinese)
[3]汪闻韶,金崇磐,王克成.土石坝的抗震计算和模型试验及原型观测,水利学报,1987,(12):1~16.WANG Wenshao,JIN Chongpan,WANG Kecheng.Aseismatic calculation,model test and prototype experiments and field monitoring ofearth-rock dam[J].Journal of Hydraulic Engineering.1987,(12):1~16.(in Chinese)
[4]赵剑明,常亚屏,陈宁.高心墙堆石坝地震变形与稳定分析[J].岩土力学,2004,25(s2):423~428.ZHAO Jianming,CHANG Yaping,CHEN Ning.Study on earthquake-induced permanent deformation and dynamic stability of high corerock-fill dam[J].Rock and Soil Mechanics.2004,25(s2):423~428.(in Chinese)
[5]中国水利水电科学研究院.两河口水电站心墙堆石坝坝料动力特性试验研究报告[R].2008.6.China Institute of Water Resources and Hydropower Research.Rock-fill materials dynamic properties research reports of Lianghekou earthcore rock-fill dam[R].2008.6.(in Chinese)
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