原状软黏土空心圆柱试样制备研究

Preparation of hollow cylindrical samples of intact soft clay

空心圆柱仪是进行主应力轴旋转试验研究的主要试验仪器。目前国内外很少用此仪器进行原状土试验研究的一个主要原因是原状土试样取样、制备困难。在大量研究和试验基础上,确定了浙江大学5 Hz空心圆柱仪的试样尺寸。针对杭州软黏土的特性,成功研制了适用于软黏土的内壁切削器和内壁精修器,详细介绍了外、内壁的切削步骤和试样安装过程。实践证明:可以用自发研制的制样器成功完成原状软黏土空心圆柱试样的制备,所制试样完全满足试验要求,解决了原状土试验研究试样制备的难题,为后续研究提供了制样保证。

Hollow cylinder apparatus （HCA） is the main equipment for the study of principal stress rotation. Nowadays the main reason for few studies on the research of intact samples was due to the difficulties of sampling. Based on researches and tests, the sample size of 5 Hz HCA in Zhejiang University was determined. Sample kits for soft clay, especially the cutting head and refinishing kit for inner wall preparation, were invented and proved to be successful. Details of cutting procedures and installation of sample were introduced. The present method of sample preparation provided a useful way to make suitable samples for HCA test.