纤维改性粘土渗透特性试验研究  

Test Research on Permeability Characteristic of Fiber Modified Clay

作　　者：陈海玉[1] 曹林涛[1] 徐福卫[1] 

机构地区：[1]湖北文理学院,湖北襄阳441053

出　　处：《三峡大学学报（自然科学版）》2013年第6期67-70,共4页Journal of China Three Gorges University：Natural Sciences

基　　金：河北省交通厅科技项目;河北省交通厅计划处项目

摘　　要：对用废旧衣服纤维改造后的填土材料(简称纤维改性粘土)进行渗透特性研究,采用变水头渗透试验,得出以下结论:土体试块径向渗透系数大于轴向渗透系数,土体渗透性受土体构造影响;分别掺入化纤、棉质等废旧衣物纤维的土体试块,土体渗透系数均高于素土渗透系数,且化纤纤维对土体渗透性的改善效果优于棉麻类纤维;纤维对粘土渗透性的改善效果随纤维含量的增加,效果减弱,存在最优纤维含量使得改善效果最佳.经纤维改造后,土体渗透性加大,可以用来做对渗透性要求较高的路基填土.Based on variable head permeability test,the permeability characteristic of fiber modified clay is studied.The study results show that the clay's permeability coefficient under the horizontal flow is higher than permeability coefficient under vertical flow;the clay's structure would effect much on its permeability. Both of chemical and cotton fibers could enhance clay's permeability apparently,when chemical fiber enhanced more obviously.With the increasing fiber content,clay's permeability coefficient grow larger and larger,but more and more slowly.There is an optimal fiber content.After modified by cloth fiber,permeability of plain clay is optimized;thus it could be used as roadbed fill which needs higher permeability.

关 键 词：变水头渗透试验 纤维改性粘土 土体渗透性 

分 类 号：TU411.4[建筑科学—岩土工程]