高质量连续取土技术研究

Research on high quality continuous sampling techniques

简要介绍了国内常规的取土技术。阐述了土样扰动对工程设计的经济性和合理性的影响,介绍了高质量连续性取土器的构成及其取样过程中的特点,即适用土层类型广可以获取粉细砂原状样。通过室内模拟试验,根据土体的变形、贯入力的变化以及孔隙水压力的比较分析进行研究,结果表明,连续性取土器能获取高质量的土样,效率较高,可以成为地层调查的重要工具。

The conventional sampling techniques used in China are presented together with the effects caused by soil disturbance on the engineering design. The design and operation of a high quality continuous sampler, which can obtain undisturbed fine silty sand samples, are introduced. The operation of the continuous sampler was simulated in the laboratory. The effects of sampling on the deformation of soil, the magnitude of push-in force and the change of pore-water pressure have been studied. The results show that...