上海松江有轨电车T1线路基压实试验评价

Evaluation on Subgrade Compaction Experimental of Tram T1 Line in Songjiang,Shanghai

该文采用地基系数K30平板载荷试验、现场承载比CBR试验和回弹模量(承载板法)试验等方法对上海松江有轨电车T1线路基基床表层和基床底层的性能进行评价。试验结果表明:T1线基床表层K30<190MPa/m,基床底层路基的承载比CBR<6%;除A4和A7点回弹模量E0>25MPa外,其他点均小于25MPa。该线路基床表层和底层均不能满足设计要求,需要做地基处理。

The performance of the surface and bottom layer of subgrade bed of the Songjiang Tram T1 Line of Shanghai is evaluated by using the foundation coefficient K30 slab loading test, site california bearing ratio CBR test and resilient modulus(bearing plate method) test. The test results show that the K30 of the surface layer of T1 Line subgrade bed is less than 190 MPa/m, and the CBR of the bottom layer of subgrade bed is less than 6%;The resilient modulus E0 of A4 and A7 are more than 25 MPa, the other points are all less than 25 MPa. The surface and bottom layer of the subgrade bed of this line all can’t meet the design requirement, and the foundation treatment is needed.