Design and Development of RI-Cone

随着人们对不良土质场地、地下空间和复垦土地利用的需求不断增加，岩土工程师们对获取尽可能准确的地下土壤信息的要求也越来越高。京都大学设计和开发了一种新的中子-水分锥，中子-水分锥。这种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有关的不确定性。尽管还有许多问题有待解决，如沿着轴向的变形及其对计数率的影响，影响区域的范围等，但它具有便携性、可重复性和长期经济性等优点，这种新研制的NM锥已在三个不同的地点得到成功的应用。实验结果表明，NM-锥形土壤水分仪是一种多功能的仪器，它不仅可以测量土壤水分剖面，而且还可以测量锥形阻力、超静孔隙压力和套筒摩擦力，我们坚信这种系统将在土壤调查中经常使用。

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.