摘要
为了研究土体固结对渗透系数的影响,以某粘土为研究对象,通过改进的渗透试验方法,量测固结发生过程中不同时间的渗透系数,并对单个试件分四段进行渗透试验。提出了前期渗透系数和后期渗透系数的概念。研究发现:前期渗透系数(30d之前)大于后期渗透系数(210d之后),上段土渗透系数大于下段土的,并且上段土的渗透系数稳定的时间晚于下段土;固结时间长的试件比固结时间短的渗透系数小,后期渗透系数应在平均渗透系数之上进行修正后再应用于工程。
In order to study the effect of the soil consolidation on its permeability,taking a kind of clay as the sample,a series of permeability test has been conducted.By the test,the paper proposes the concept of early permeability and late permeability.It is found that the early permeability is higher than the late permeability,the permeability of upper solid is higher than that of lower solid,the permeability of upper solid stabilized moment is later than of the lower,and the sample whose consolidation period is longer has the lower permeability.The latest permeability should be amended based on the average permeability,the it can be used in engineering.
出处
《辽宁科技学院学报》
2011年第1期40-41,55,共3页
Journal of Liaoning Institute of Science and Technology
关键词
固结
前期渗透系数
后期渗透系数
基质吸力
基础稳定
Consolidation
Early permeability
Late permeability
Suction
Foundation stability