软土地基取土质量控制与分析

Quality Control and Analysis of Soil Sampling in Soft Soil Foundation

本文叙述了杭州湾跨海大桥南岸接线高速公路软基试验段工程中钻孔取土所用的机具与水压式固定活塞薄壁取土器的应用情况,介绍了室内试验的土样制作情况,对软土试样无侧限抗压强度试验的结果进行了统计分析,得到四层土共105个试样的平均破坏应变只有5.4%,说明本工程取土质量是好的,室内土工试验结果可用于工程效果的判断和理论分析计算。

The applications of the drilling instruments and fixed-piston thin wall sampler with hydraulic pressure for soil sampling are introduced, and the soil sample preparing demanded in the lab is described for the expressway experimental section of the south shore connecting line for the spanning bridge in Hangzhou Bay. The testing results for the unconfined compression strength of the soil indicate that the mean failure strain of the soil samples is only 5.4%, which reflects the quality of borehole specimens is better. The results can be used for the judgment of engineering effect and the theoretical analysis.