海洋饱和软土UU测试值与原位测试值相关性分析

Correlations between UU Test Values and In Situ Test Results of a Marine Soft Soil

海洋饱和软土的力学性质对海洋工程建设具有重要作用,但由于海洋软土土样易扰动,试验数据可靠性低,而原位测试由于受到海洋环境的影响实施较为困难。通过珠海横琴某工程的原状饱和软土的UU测试值,与相同位置、相同深度处的原位十字板测试值和双桥静力触探试验测得的锥尖阻力值进行比较分析,得出饱和软土UU测试值与十字板测试值、双桥静力触探锥尖阻力值具有很好的一致性;折减后的十字板测试值与UU测试值较为接近,可作为海洋工程中相关参数选取的参考。

Engineering properties of marine soft soils are critical to the costal engineering and construction.Difficulties are frequently encountered in testing the soft soil strength.Due to the sample disturbance,the laboratory tested values usually have low reliability but the in-situ testing is difficult to perform under the marine environment.This paper presents the studies on the marine soft soil in a project in Hengqin Island,Zhuhai City.The undrained unconsolidated（UU）triaxial shear test results were compared with the undrained shear strength obtained from vane shear test results at the same depth and the tip resistance from the cone penetration test（CPT）results.Good consistency is obtained from the UU results and vane shear as well as CPT tip resistance.The UU values can be compared with the vane shear test results with a reduction factor.