Design and Development of RI-Cone

随着对不良土质土地、地下空间和填海造地利用需求的不断增加，如何获取尽可能准确的地下土壤信息成为岩土工程人员面临的挑战。京都大学设计并开发了一种新的中子湿气锥穿透仪。这种类型的仪器的主要优点之一是它消除了与钻孔和套管以及用于固定钻孔的材料类型相关的不确定性。虽然圆锥贯深仪沿轴的畸变及其对计数率、受影响范围的影响等问题仍有待解决。尽管如此，从长远来看，它提供了一些优点，如可移植性、可重复性和经济性。这种新开发的纳米锥已经成功地应用于三个不同的地点。研究表明，纳米锥贯仪是一种多功能仪器，不仅可以测量地面的水分分布，还可以测量锥阻力、超孔隙压力和套筒摩擦。我们坚信，这一系统将被纳入土壤调查的常规使用。

With the ever increasing demand for the utilization ground with undesirable soil properties, underground space, and reclaimed land, it is challanging for the geotechnical engineers to obtain as accurate information, of subsurface soil, as possible. Keeping tills aim in mind a new neutronmoisture cone, penetrometer has been designed and developed at the Kyoto University.One of the major advantages of this type of instrument is that it eliminates the uncertainties that are associated with the boring and casing and the type of materials used in securing the bore holes. Though many problems remains to be solved such as the distortion along the shaft of the cone penetrometer and its affect on the count-rate, the extent of the affected area etc. Nontheless, it offers several advantages like portability, reproducibility, and the economics in the long run.This newly developed NM-cone has beeen successfully used at three different sites. It has been shown that the NM-cone penetrometer is a versatile instrument, which can not only measure moisture profile of the ground but also is capable of measuring cone resistance, excess pore pressure, and sleeve friction.We strongly believe that such a system will be incorporated for regular use in carrying out soil investigation.