Based on the lab orthogonal tests, using self-manufactured constant head permeameter, the effect of gravel content, void ratio and particle shape on the coefficient of permeability of soil-rock-mixture was studied. 本文采用室内正交实验，利用自制的常水头渗透仪，研究了砾石含量、孔隙比和颗粒形状3个因素在不同水平下对土石混合体渗透系数的影响。
At present used for detection of shieldability testing equipment fanwei permeability Tester permeability tester, gas permeable, permeameter, container/film permeable instrument, etc. 目前用于阻隔性测试的检测设备主要有透气性测试仪、透湿性测试仪、透氧仪、气体渗透仪、容器／薄膜透氧仪等。
