隧道工程非织造土工布的水平排水特性探讨  

Discussion on level drainage property of nonwoven geotextiles in tunnel engineering

作　　者：蒋雅君[1] 杨其新[1] 刘东民[2] 盛草樱[3] 

机构地区：[1]西南交通大学交通隧道工程教育部重点实验室,四川成都610031 [2]西南交通大学峨嵋校区土木工程系,四川峨眉山614202 [3]西南交通大学生命科学与工程学院,四川成都610031

出　　处：《新型建筑材料》2013年第1期57-61,共5页New Building Materials

基　　金：国家自然科学基金青年科学基金项目(51108385);中央高校基本科研业务费专项资金资助(SWJTU11ZT33)

摘　　要：根据非织造土工布的结构特点、隧道工程的环境条件,基于非织造土工布水平方向的多孔介质模型与水平排水试验,对非织造土工布在水平方向上的排水特性进行了分析和探讨。模型分析表明,其2个重要影响参数等效孔径r、孔隙数目N会受非织造布的规格、外界法向压力等因素的影响发生变化;水平排水试验结果也表明,虽然单位面积质量高的无纺布等效过水面积大,但由于其等效孔径小且孔隙数量多,造成过水截面中的孔隙总周长大,使其水平排水能力降低。The level drainage property of nonwoven geotextiles was analyzed and discussed based on porous medium model of level direction and level drainage experiments according to the microstructure features of nonwoven geotextiles and environmental conditions of tunnel engineering. The analyses to the porous medium model shows that two important parameters （equivalent aperturerr and number of pores N） of the model will adjust to suit the change of plane unit mass of nonwoven geotextiles and normal pressure on it. The level drainage experiments also show that although the nonwoven geotextiles with high plane unit mass has bigger equivalent flow area,its level drainage capability is lower because its equivalent circumference is longer according to the smaller equivalent aperture and more numbers of pores of the level flow section.

关 键 词：非织造土工布 水平排水性能 多孔介质模型 隧道工程 

分 类 号：TU579[建筑科学—建筑技术科学]