论文部分内容阅读
一、概述对各种粒径小于0.1mm或小于0.074mm的细粒土颗粒测定,一般采用比重计法、移液管法和粒径计法,也有采用其它方法的。比重计法测定精度较低,移液管法操作繁琐,效率低,进口先进仪器,价格昂贵,成本较高。由中国科学院成都山地灾害与环境研究所研制成功的新型土壤物理性质测定仪,操作简单,速度快、精度高、成本低。是以斯笃克斯沉降原理为基础、结合水压差原理和等体积原理相互为用、互为补充研究而成的,是“移液管法”测试技术的进一步发展。主要由PD-I/II型颗
First, an overview of a variety of particle size less than 0.1mm or less than 0.074mm fine particle determination of the soil, the general hydrometer method, pipette method and particle size meter method, but also using other methods. The hydrometer method has the advantages of low determination accuracy, complicated pipette method operation, low efficiency, advanced imported equipment, high cost and high cost. The new soil physical property tester developed by Chengdu Institute of Mountain Hazards and Environment, Chinese Academy of Sciences has simple operation, high speed, high precision and low cost. It is based on the principle of settling sediment, combining with the principle of water pressure difference and equal volume principle, complement each other, and is the further development of the “pipette method” test technology. Mainly by the PD-I / II-type particles