深厚软土基坑不同加固形式效果研究

Study on Effects of Different Reinforcement Forms for Foundation Pit in Deep Soft Soil

结合广东省软土地区某地铁车站基坑工程,采用有限元软件midasGTS进行数值模拟,研究不同加固形式对限制基坑变形的效果。结果表明:不同的加固形式对限制基坑变形的效果差异明显;不同加固形式下,随着加固面积比的提高对基坑变形的限制作用均有所增加,但并不呈现线性关系;当加固面积比达到某一数值后,限制基坑变形的效果均不再提升;在加固面积相同的情况下,采用抽条加固对限制基坑变形效果最佳。

In relation to the foundation pit engineering of a metro station in soft soil region in Guangdong Province,the finite element software midas GTS was used to carry out numerical simulation and study the effects of different reinforcement forms on restriction of foundation pit deformation.The result shows that,there exist significant differences among the effects of different reinforcement forms on restriction of foundation pit deformation;under each reinforcement form,the restriction effect on foundation pit deformation is improved with the increment of reinforced area ratio,but not in linear relationship;when the reinforced area ratio reaches a certain value,the restriction effect is no longer improved;when the reinforced area is the same,strip reinforcement will contribute an optimal effect on restriction of foundation pit deformation.