中文摘要：

利用数值模拟研究软粘土地基加筋土土工格栅最优布置方式,着重研究首层格栅埋置深度、格栅间距、格栅层数以及格栅长度对加筋土极限承载力的影响。通过逐渐增大基础表面荷载获得荷载-位移曲线,根据曲线拐点确定地基极限承载力。研究结果表明：地基承载力随首层格栅埋置深度增加呈现先增大后减小的趋势,当首层格栅埋置深度为0.2B时,地基承载力达到峰值;格栅间距小于0.25B时,地基承载力随格栅间距增大而增大,当其大于0.25B时,地基承载力随格栅间距增大而迅速减小;地基承载力随格栅层数增加均有所提高,但当其大于4层时,地基承载力增大速率明显降低;格栅长度小于2.0B时,地基承载力随其增大而显著增大,格栅长度大于2.0B时,格栅长度增加引起的地基承载力增大较小。

英文摘要：

This paper uses numeric simulation to study the optimized arrangement of geogrid in reinforced soil of soft clay foundation. The study focused on influence to maximum bearing capacity of reinforced soil by first layer geogrid buried depth,geogrid distance,geogrid layers and geogrid length. Obtain load-displacement curve by gradually increasing foundation surface load,so to determine ultimate bearing capacity of foundation according to turning point on curve. Results show： The foundation bearing capability,with the increasing of first layer geogrid buried depth,appears to be the trend of increasing and then reducing. The foundation bearing capability reaches peak value when the first layer geogrid buried depth is 0. 2B. When geogrid distance is less than 0. 25 B,the foundation bearing capability increases with the increasing of geogrid distance,when geogrid distance larger than 0. 25 B,the foundation bearing capability reduce sharply with the increasing of geogrid distance; The foundation bearing capability increases with the increasing of geogrid layer numbers,but when the layer number exceeds 4,the increment of foundation bearing capability lowers down obviously. When the geogrid length is less than 2. 0B,the foundation bearing force increases obviously with geogrid length increment,while when the geogrid length is over 2. 0B,the increment of foundation bearing capability with the geogrid length increment is relatively small.