土工膜防渗工程的渗流计算探讨  

Discussion of Seepage Calculation for Geomembrane Preventing Seepage Engineering

作　　者：彭云枫[1] 郝丹[1] 

机构地区：[1]三峡大学水利与环境学院,湖北宜昌443002

出　　处：《安徽农业科学》2013年第7期3241-3243,共3页Journal of Anhui Agricultural Sciences

摘　　要：土工膜是一种新型防渗材料,在渠道、堤防、水库等防渗工程中已经得到了广泛的应用,但关于土工膜防渗工程的渗流计算方面还有待研究。基于土工膜的渗流机理,将发生在土工膜中的渗流分为土工膜本身渗透和土工膜缺陷渗漏两类,分别进行分析。根据原型观测资料进行反演,从平均意义上对土工膜的渗流系数进行取值,可以从宏观上解决土工膜缺陷难以确定的问题。最后分析了等效土体法进行土工膜防渗土石坝渗流计算的误差来源,指出在实际计算时,需要进行相应的误差分析。As a new kind of seepage control material,the geomembrane has been widely used in embankments,canals and reservoirs,yet the seepage calculation of the geomembrane preventing seepage engineering has not been studied on theory.Based on seepage mechanism in geomembrane,the seepage was classified into two types: one is permeability of geomembrane itself;the other is defect leakage flux in geomembrane.Based on feedback analysis of geomembrane earthrock dam with observation data,the permeability coefficient of geomembrane can be obtained on average,so the problem that the defects in geomembranes are difficult to ascertain is solved.At last,the sources of error in seepage calculation for geomembrane earthrock dams by method of clay equivalency were discussed.It was pointed out that in actual calculation,the corresponding error analysis should be conducted.

关 键 词：农业水利 土工膜 防渗工程 渗流特性 渗流计算 

分 类 号：S217[农业科学—农业机械化工程] TV641[农业科学—农业工程]