尾矿坝地震反应的拟静力稳定分析
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摘要
《水工建筑物抗震设计规范》[1]所建议的拟静力分析属于毕肖普总应力分析方法,由于没有考虑静态与动态条间孔隙水压力的影响,计算结果偏于不安全。根据渗流场的分析结果得到静态孔隙水压力分布,依据动力液化分析确定动态孔隙水压力增量,并应用于条间水压力分析之中,提出了拟静力分析的改进有效应力分析方法,应用于某一尾矿坝动力稳定分析中得到了较为满意的计算结果。
The equivalent static analysis is Bishop’ total stress analytical method,which is recommended by Chinese Specifications for Seismic Design of Hydraulic Structure.Because of thinking no influence of the pore water pressure of inter-slice in static and dynamic state,the calculating results tend to unsafe.It is applied at analysis of pore water pressure of inter-slice which are the static distribution of pore water pressure based on FEM of static seepage field and dynamic pore water pressure increment in the light of dynamic liquefaction FEM analysis.A modified effective analysis method of equivalent static analysis is suggested.The computing result is satisfied in the dynamic stability analysis of a tailings dam.
The equivalent static analysis is Bishop’ total stress analytical method,which is recommended by Chinese Specifications for Seismic Design of Hydraulic Structure.Because of thinking no influence of the pore water pressure of inter-slice in static and dynamic state,the calculating results tend to unsafe.It is applied at analysis of pore water pressure of inter-slice which are the static distribution of pore water pressure based on FEM of static seepage field and dynamic pore water pressure increment in the light of dynamic liquefaction FEM analysis.A modified effective analysis method of equivalent static analysis is suggested.The computing result is satisfied in the dynamic stability analysis of a tailings dam.
引文
[1]DL5073-2000,水工建筑物抗震设计规范[S].
[2]谢定义.土动力学[M].西安:西安交通大学出版社,1988.
[3]陈国兴.土体地震反应分析的简化有效应力法[J].地震工程与工程振动,1995,15(2):52-61.CHEN Guo-xing.Simplified effective analysis method of earthquake response for soil mass[J].Earthquake Eng-ineering and Engineering Vibration,1995,15(2):52-61
[4]徐志英,周健.土坝地震孔隙水压力产生、扩展和消散的三维动力分析[J].地震工程与工程振动,1985,5(4):57-72.XU Zhi-ying,ZHOU Jian.3D dynamic analysis of generation,expansion and slaking of earthquake pore water pressure to soil dam[J].Earthquake Engineering and Engineering Vibration,1985,5(4):57-72.
[5]Hartin B O,Drnevich V P.Shear modulus and damping in soils:design equations and curves[J].Journal of the Soil Mechanics and Foundation Division,1972,88(SM7):667-692.
[6]南钢集团冶山铁矿.尾矿库增容加高场地岩土工程勘察报告书[R].武汉:冶金工业部武汉勘察研究院,2002.
[7]罗晓辉,白世伟,万凯军,等.尾矿坝渗透静力稳定分析[J].岩土力学,2004,25(4):560-564.LUO Xiao-hui,BAI Shi-wei,WAN Kai-jun,et al.Static stability analysis in the atate of aeepage of the mine tailings dam[J].Rock and Soil Mechanics,2004,25(4):560-564.
[2]谢定义.土动力学[M].西安:西安交通大学出版社,1988.
[3]陈国兴.土体地震反应分析的简化有效应力法[J].地震工程与工程振动,1995,15(2):52-61.CHEN Guo-xing.Simplified effective analysis method of earthquake response for soil mass[J].Earthquake Eng-ineering and Engineering Vibration,1995,15(2):52-61
[4]徐志英,周健.土坝地震孔隙水压力产生、扩展和消散的三维动力分析[J].地震工程与工程振动,1985,5(4):57-72.XU Zhi-ying,ZHOU Jian.3D dynamic analysis of generation,expansion and slaking of earthquake pore water pressure to soil dam[J].Earthquake Engineering and Engineering Vibration,1985,5(4):57-72.
[5]Hartin B O,Drnevich V P.Shear modulus and damping in soils:design equations and curves[J].Journal of the Soil Mechanics and Foundation Division,1972,88(SM7):667-692.
[6]南钢集团冶山铁矿.尾矿库增容加高场地岩土工程勘察报告书[R].武汉:冶金工业部武汉勘察研究院,2002.
[7]罗晓辉,白世伟,万凯军,等.尾矿坝渗透静力稳定分析[J].岩土力学,2004,25(4):560-564.LUO Xiao-hui,BAI Shi-wei,WAN Kai-jun,et al.Static stability analysis in the atate of aeepage of the mine tailings dam[J].Rock and Soil Mechanics,2004,25(4):560-564.
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