地基土粉砂层动力特性分析试验研究
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摘要
本文通过对某核电厂取水明渠导流堤地基土粉砂层室内共振柱试验及动三轴液化试验,测定了动剪切模量、阻尼比与动剪应变幅的双曲线关系,分析了粉砂的动力变形特性,探讨了砂土的抗液化强度与液化振次之间的乘幂函数关系,确定了该地基土的抗液化强度指标。为评价导流堤的地震稳定和液化分析提供了相关参数,同时对堤坝工程场地的地震安全性评价和液化评判有良好的借鉴和参考价值。
Based on the indoor resonance column test and dynamic triaxial liquefaction test on diversion dike soil of a nuclear power plant,the curves of dynamic shear modulus-dynamic shear strain and damping ratio-dynamic shear strain are determined.The tests analyzed the dynamic deformation characteristics of diversion dike soil,and studied the exponentiation function between liquefaction resistance strength and liquefaction shake times of sand soil.The indexes of liquefaction resistance strength are confirmed.It provided the relevant parameters for evaluating seismic stability and liquefaction analysis of diversion dike,and reference value for the seismic safety evaluation and liquefied evaluation of the dam project site.
Based on the indoor resonance column test and dynamic triaxial liquefaction test on diversion dike soil of a nuclear power plant,the curves of dynamic shear modulus-dynamic shear strain and damping ratio-dynamic shear strain are determined.The tests analyzed the dynamic deformation characteristics of diversion dike soil,and studied the exponentiation function between liquefaction resistance strength and liquefaction shake times of sand soil.The indexes of liquefaction resistance strength are confirmed.It provided the relevant parameters for evaluating seismic stability and liquefaction analysis of diversion dike,and reference value for the seismic safety evaluation and liquefied evaluation of the dam project site.
引文
[1]王社良.抗震结构设计[M].武汉:武汉理工大学出版社,2008.
[2]Yoshimi Y,Tokimastsuk,kaneko O et al,Undrained CyclicShear Strength of a dense Niigata Sand.Soils and Foundation,1984,24(4).
[3]刘小生,汪闻韶,赵冬.饱和原状砂土的静动力强度特性试验研究[J].水利学报,1991,(11).
[4]张克绪.饱和砂土的液化应力条件[J].地震工程与工程震动,1984,4(1).
[5]Finn W D L,Liquefaction Potential,developments since1976,Int,conf,on Recent Advances in GeotechnicalEarthquake Engineering and Soil Dynamics,1981.
[6]袁晓铭,孙锐,孙静,等.常规土类动剪切模量和阻尼比试验研究[J].地震工程与工程振动[J],2000,20(4):133-139.
[7]谢定义.土动力学[M].西安:西安交通大学出版社,1988.
[2]Yoshimi Y,Tokimastsuk,kaneko O et al,Undrained CyclicShear Strength of a dense Niigata Sand.Soils and Foundation,1984,24(4).
[3]刘小生,汪闻韶,赵冬.饱和原状砂土的静动力强度特性试验研究[J].水利学报,1991,(11).
[4]张克绪.饱和砂土的液化应力条件[J].地震工程与工程震动,1984,4(1).
[5]Finn W D L,Liquefaction Potential,developments since1976,Int,conf,on Recent Advances in GeotechnicalEarthquake Engineering and Soil Dynamics,1981.
[6]袁晓铭,孙锐,孙静,等.常规土类动剪切模量和阻尼比试验研究[J].地震工程与工程振动[J],2000,20(4):133-139.
[7]谢定义.土动力学[M].西安:西安交通大学出版社,1988.
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