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渗透系数(K)是一个重要的水文地质参数。近年来,随着科学的发展,对地面沉降、越流补给等问题的研究逐步深入,人们越来越感到了解原状粘性土渗透系数的重要性。以往求解越流系数(B=K/M),一般采用抽水试验方法,但误差往往较大。近两年来,我系“渗透固结实验室”采用了张人权、曹文炳等讨论设计的渗透固结仪,通过试验,能够较好地测定原状粘性土的渗透系数。我们利用这种仪器已为河北地质九队、山西水文一队等测试了一些原状粘性土的渗透系数,一般亚矿土、亚粘土渗透系数在10~(-6)~10~(-7)(cm/sec)之间,粘土可达10~(-9)(cm/sec)。
The coefficient of permeability (K) is an important hydrogeological parameter. In recent years, with the development of science, researches on issues such as land subsidence and over-flow recharge have gradually deepened, and people are increasingly aware of the importance of understanding the permeability coefficient of the original viscous soil. In the past, the overflow coefficient (B=K/M) was solved. Generally, the pumping test method was used, but the error was often large. In the past two years, our Department of Permeability and Consolidation has adopted the infiltration and consolidation instrument discussed and discussed by Zhang Zhirong and Cao Wenbing. Through experiments, the permeability coefficient of the original viscous soil can be well measured. We have used this instrument to test the permeability coefficients of some original viscous soils for Hebei Geological Team 9 and Shanxi Hydrology First Team. Generally, the permeability coefficient of sub-ore and sub-clay is between 10~(-6)~10~(-7). Between (cm/sec), the clay can reach 10~(-9)(cm/sec).