利用固结法求解黏性土渗透系数

Using consolidation method solving the permeability coefficient of clay

G203“松原至金宝屯”段沿线盐渍化黏性土渗透性能极小,公路病害频发,通过加入结晶氯化铝改良其渗透性能。由于黏性土的渗透系数极小,室内和室外试验受水头限制渗流速度缓慢甚至趋近于0,常规方法求解渗透系数比较困难。而一维固结仪能够提供十几米甚至几十米的水头压力,从而加速黏性土中水的流出。提出固结法求解黏性土的渗透系数,并利用该方法评价了结晶氯化铝改良盐渍化黏性土后渗透系数的变化。

A large number of saline clay distribute along the national highway 203 in songyuan to jinbaotun segment.The permeability coefficient of saline clay is very small.The highway diseases often appear because of the small permeability coefficient.In this paper,the permeability of saline clay was improved by adding the crystallization of aluminum chloride.But testing the permeability coefficient of saline clay is very difficult by conventional?methods,because water seepage velocity in saline clay is trending to zero.Oedometer can offer a?few tens?of?meters head pressure accelerating water flowing out.This paper use consolidation method solving the permeability coefficient of saline clay,and the changes of permeability coefficient is estimated by this method.