【摘要】 动力离心模型试验是研究可液化地基上抗滑桩加固边坡地震动力响应的有效手段之一。使用铜质抗滑模型桩,采用黏度为50cs的甲基硅油做为孔隙流体,通过抽真空法制作了饱和地基上的加固边坡模型。进行动力离心模型试验,研究了地震作用下饱和砂土地基中动孔压、边坡变形与土体加速度和抗滑桩弯矩的响应特征。试验结果表明,地震作用导致的动力附加弯矩相当于震前静力弯矩的87%,说明地震作用与地基液化导致的附加弯矩不容忽视,该结论可为边坡进行抗震设计与稳定分析提供有意义的参考。更多还原

【Abstract】 By using the copper model piles and silicon oil instead of water,the centrifuge modeling dynamic response of soil slope reinforced with one row of piles on saturated foundation during earthquake was conducted.Based on the test results,the characteristics of the seismic response of pore pressure in foundation,acceleration in soil and moment in piles during earthquake were investigated.According to the observation and analysis,it can be concluded that the accumulation of excess pore pressure in saturated sand foundation,especially liquefaction not only makes the bending moment of pile increase as much as 87 % but also weakens the acceleration response in the slope.更多还原