| 大连饱和黏土动力特性研究 |
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| 引用本文： | 栾茂田,聂影,郭莹,王猛,刘树杰.大连饱和黏土动力特性研究[J].大连理工大学学报,2009,49(6):907-912. |
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| 作者姓名： | 栾茂田 聂影 郭莹 王猛 刘树杰 |
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| 作者单位： | 大连理工大学,海岸和近海工程国家重点实验室,辽宁,大连,116024;大连理工大学,土木水利学院岩土工程研究所,辽宁,大连,116024 |
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| 基金项目： | 国家自然科学基金资助项目(50579006,50639010; 重点项目50439010) |
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| 摘 要： | 利用土工静力-动力液压三轴-扭转多功能扭剪仪,使用改进的真空抽吸法制备重塑饱和黏土空心试样,采用单独试样振后固结再振(加卸载)的试验方法,探讨了大连饱和黏土的动力特性.试验结果表明:在微小应变下避免孔隙水压力明显升高,使用单独试样通过改变固结压力的方法获得的最大动剪切模量Gmax和阻尼比ξ与用多个试样常规方法获得的结果很接近,是比较可靠的;卸压时的G随固结压力的减小而降低,下降的梯度比加压时的小.试验中将非接触式与接触式角位移计联合使用,以提高微小剪应变的测量精度.试验得到的归一化后的G/Gmax-γ和ξ/ξmax-γ基本落入一个很窄的范围内,并且由G/Gmax-γ和ξ/ξmax-γ关系曲线可用公式估算出G和ξ.采用这种单独试样振后固结再振的方法可以节省取样数量和解决土性不均匀问题,并且在试验结果可靠的基础上能够提供很多便利.
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| 关 键 词： | 饱和黏土 动扭剪试验 真空抽吸法 动剪切模量 阻尼比 |
Study of dynamic properties of Dalian saturated clay |
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| LUAN Maotian,NIE Ying,GUO Ying,WANG Meng,LIU Shujie.Study of dynamic properties of Dalian saturated clay[J].Journal of Dalian University of Technology,2009,49(6):907-912. |
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| Authors: | LUAN Maotian NIE Ying GUO Ying WANG Meng LIU Shujie |
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| Institution: | LUAN Mao-tian1,2,NIE Ying1,GUO Ying1,WANG Meng1,LIU Shu-jie1,21.State Key Laboratory of Coastal , Offshore Engineering,Dalian University of Technology,Dalian 116024,China,2.Institute of Geotechnical Engineering,School of Civil , Hydraulic Engineering |
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| Abstract: | The apparatus for static and dynamic universal triaxial and torsional shear soil testing is employed to perform cyclic torsional shear test with hollow cylindrical clay specimen which is prepared by advanced vacuum suction method.The cyclic torsional shear test was conducted to measure dynamic shear modulus and damping ratio of Dalian saturated clay under different confining pressures(including increased and decreased pressure with single specimen)to replace the conventional dynamic characteristics method.E... |
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| Keywords: | saturated clay dynamic torsional test vacuum suction method dynamic shear modulus damping ratio |
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