毛细导水土工材料调控路基水分场现场试验研究  

Field test study on moisture adjustment of wicking geotextile in road subgrade

作　　者：白梅 刘志彬[1,2] 张书建[3] 张云 罗婷倚 唐亚森 Bai Mei;Liu Zhibin;Zhang Shujian;Zhang Yun;Luo Tingyi;Tang Yasen(Institute of Geotechnical Engineering,Southeast University,Nanjing 211189,China;National Demonstration Center for Experimental Road and Traffic Engineering Education,Southeast University,Nanjing 211189,China;Jilin Provincial High Class Highway Construction Bureau,Changchun 130062,China;Guangxi Beitou Construction and Investment Group Co.,Ltd.,Nanning 530028,China)

机构地区：[1]东南大学岩土工程研究所,南京211189 [2]东南大学道路交通工程国家级实验教学示范中心,南京211189 [3]吉林省高等级公路建设局,长春130062 [4]广西北投公路建设投资集团有限公司,南宁530028

出　　处：《东南大学学报（自然科学版）》2022年第1期117-123,共7页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(41877240);吉林省交通运输科技计划资助项目(2016-1-16-2);东南大学优秀博士学位论文培育基金资助项目(YBPY2154).

摘　　要：为探究毛细导水土工材料调控路基水分场的能力与效果,在季冻区开展现场试验研究,通过传感器监测与钻孔取样的方法分析了路基水分场变化与路基不同深度处水分的分布情况,并结合扫描电镜分析了毛细导水土工材料的抗淤堵能力.结果表明,毛细导水土工材料在路基中稳定地发挥了吸水与排水作用,使路基土质量含水率在1 a内降低约5%.毛细导水土工材料上侧60 cm至下侧80 cm的范围为其有效作用范围.服役1 a的毛细导水土工材料结构保持完整,未见明显的机械损伤与毛细导水纤维排水通道淤堵现象.毛细导水土工材料可以在温度-20~30℃、相对湿度40%~60%的环境中正常发挥调控路基水分场的能力.To study the performance and the effect of wicking geotextile on moisture adjustment in road subgrade,field tests were conducted in seasonal freezing area of China.The moisture content change of the subgrade soil and the moisture distribution at different depths of the road subgrade were monitored by sensor and bore-hole sampling.The clogging effect of the wicking geotextile was analyzed by scanning electron microscopy.The results show that the wicking geotextile performs water absorption and drainage effect in the road subgrade.The gravimetric moisture content of subgrade soil is reduced by about 5%one year after the installation of the wicking geotextile.The effective influential range of the wicking geotextile is from 60 cm on the upper side to 80 cm on the lower side.After one-year service,the fabric structure of the wicking geotextile still maintains complete,and no obvious permanent deformation and the clogging effect can be observed.Under the environmental temperature of-20 to 30℃and the relative humidity of 40%to 60%,the wicking geotextile can normally perform moisture adjustment effect in the road subgrade.

关 键 词：毛细导水土工材料 路基 非饱和土 淤堵 现场试验 

分 类 号：TU471[建筑科学—结构工程]