沿海软粘土取土质量的对比分析

COMPARATIVE ANALYSIS OF SAMPLING QUANLITY FOR COASTAL SOLF CLAY

本文在简要介绍固定活塞式薄壁取土器取土技术基础上，详尽分析了在连云港、赤湾港和广深路所进行的软粘土取土技术对比试验结果。试验结果表明，土样扰动对于室内所测定的力学性指标影响极大，但对物理性指标影响不大。研究结果还有力地证明，只要操作正确，采用薄壁取土器能取得高质量土样，而采用敞口式厚壁取土器取出的土样扰动较大。

After discussion of the sampling technique by using a fixed piston thin wall sampler an analysis is given on the test resut of soft clay from Harbours of Lianyungang and Chiwan,and the Guang-Shen Express Highway in this paper.It is indicated that the mechanical properties of solf clay determined in laboratory are influenced remarkably by the disturbance of soil samples,but the influence of sampling disturbance on the value of physical parameters is not significant.It is convincingly ghown by the study that high quality samples can be obtained with the thin wall sampler provided that the sampling is done strictly according to the operating instruction,while the samples obtained with conventional thick wall open drive tube sampler are often seriousjy disturbed.