南京河西砂性土地基承载力旁压试验研究

Experimental study on bearing capacity of sandy soil foundation in Hexi, Nanjing

为确定南京河西地区砂性土的地基承载力,在某项目场地进行了8组不同深度的旁压试验,并通过室内土工实验获得了砂性土的物理力学参数,最后将旁压试验测得的地基承载力与按物理力学参数计算的承载力进行了对比分析。结果表明:浅层土体中旁压试验测得的地基承载力小于理论计算值,但随着土层埋深增加,旁压试验测得的地基承载力逐渐大于理论计算值,且土层埋深越大差异越大。

In order to determine the foundation bearing capacity of sandy soil in Hexi area of Nanjing,eight groups of pressuremeter tests with different depths were carried out in a project site,and the physical and mechanical parameters of sandy soil were obtained through indoor geotechnical experiments.Finally,the bearing capacity of foundation measured by pressuremeter test was compared with the results calculated according to the theory of physical and mechanical parameters.The results show that:the foundation bearing capacity measured by pressuremeter test in shallow soil is less than the theoretical calculation value,but with the increase of soil depth,the foundation bearing capacity measured by pressuremeter test is gradually greater than the theoretical calculation value,and the greater the depth of soil layer,the greater the difference.