复合土工排水层在高速公路路面结构中的渗流机制研究  

Study on Seepage Mechanism of Composite Geotechnical Drainage Layer in Expressway Pavement Structure

作　　者：缪宏杰 郑宣恭 钟义江 MIAO Hongjie;ZHENG Xuangong;ZHONG Yijiang(Jinshan College,Fujian Agriculture and Forestry University,Fuzhou 350002,China;Xiamen Huayan Survey and Design Co.,Ltd.,Xiamen 361000,China)

机构地区：[1]福建农林大学金山学院,福建福州350002 [2]厦门华岩勘测设计有限公司,福建厦门361000

出　　处：《太原学院学报(自然科学版)》2025年第2期15-22,共8页Journal of TaiYuan University:Natural Science Edition

基　　金：教育部产学合作协同育人项目(230703231254222);福建省中青年教师教育科研项目(JAT220528);福建农林大学金山学院青年教师科研基金项目(kx230405)。

摘　　要：为研究复合土工排水层对高速公路内部渗流的影响,以永春至永定(闽粤界)高速公路为背景,开展数值分析研究。数值分析结果表明:降雨过程中复合土工排水层可在非饱和状态下排水,使路基层体积含水率呈现非线性缓慢增长,始终未达到饱和状态;降雨终止后采用复合土工排水层的道路基层体积含水率下降迅速,在前48 h内完成路基层大部分水分转移;复合土工排水层具有防渗作用,采用复合土工排水层的路基体积含水率始终等于降雨前的初始值。研究结果表明:复合土工排水层应用于高速公路排水,对提高高速公路耐久性与安全稳定性具有重要作用。To study the influence of composite geotechnical drainage layer on internal seepage of highways,a numerical analysis was conducted on the Yongchun-Yongding(Fujian Guangdong border)Expressway as the background.The numerical analysis results show:the composite geotextile drainage layer can drain water in an unsaturated state during rainfall,resulting in a non-linear slow increase in the volumetric moisture content of the base layer without reaching saturation;after the rainfall stops,the volume moisture content of the road base layer with a composite geotextile drainage layer decreases rapidly,and most of the moisture in the base layer is transferred within the first 48 h;the composite geotextile drainage layer has anti-seepage effect,and the volume moisture content of the roadbed with the composite geotextile drainage layer is always equal to its initial value before rainfall.The research results indicate that the application of composite geotechnical drainage layer in expressway drainage plays an important role in improving the durability,safety and stability of expressways.

关 键 词：复合土工材料 降雨强度 体积含水率 基层 

分 类 号：U416[交通运输工程—道路与铁道工程]