毛细透排水管排水渗流模型及设置间距研究  

Seepage Model and Installation Spacing for Capillary Drainage Pipe

作　　者：郭一鹏[1,2] 冷伍明 杨奇[1,2] 赵春彦[1,2] 昌思[3] GUO Yipeng;LENG Wuming;YANG Qi;ZHAO Chunyan;CHANG Si(School o{ Civil Engineering,Central South University,Changsha Hunan 410075,China;National Engineering Laboratory for High Speed Railway Construction,Central South University,Changsha Hunan 410075,China;China Railway Design Corporation,Tianjin 300251,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]中南大学高速铁路建造技术国家工程实验室,湖南长沙410075 [3]中国铁路设计集团有限公司,天津300251

出　　处：《中国铁道科学》2018年第4期8-13,共6页China Railway Science

基　　金：国家自然科学基金资助项目(51678572;51408613);中国铁路总公司重点课题项目(2015G006-F);湖南省科技计划项目(2017SK2212);中国神华集团科研专项(SHGF-14-55);中南大学研究生创新项目(2016zzts080)

摘　　要：毛细透排水管是一种新型高效、高功能的排水结构。为完善其设计方法,进行毛细透排水管排水渗流模型及设置间距研究。根据连续性原理,建立地下水运动基本方程,针对地下水位变化分别推导毛细透排水管排水的稳定渗流模型(地下水位恒定)和非稳定渗流模型(地下水位下降或上升)。同时,针对2阶非线性的非稳定渗流模型,采用使方程线性化和傅里叶变换的方法推导不同渗流状态下的浸润线方程。通过此方程得到不同渗流状态下的排水间距及排水量的解析解,进而得到毛细透排水管的设置间距。将研究成果应用于工程实例,计算分析毛细透排水管设置间距以及排水量与时间的关系,排水量的计算值与实测值吻合较好,表明该方法合理有效。Capillary drainage pipe is a new type of drainage structure with high efficiency and function.In order to improve its design method,the seepage model and installation spacing for capillary drainage pipes were studied.Based on the continuity principle,the basic equation of groundwater movement was established.The steady seepage model（groundwater level constant）and unsteady seepage model（groundwater level falling or rising）of capillary drain pipe were respectively established according to the variation of groundwater level.At the same time,for the second-order nonlinear unsteady seepage model,the equation of saturation line under different seepage conditions was derived by using the methods of linearizing the equation and Fourier transform.Through this equation,the analytical solutions to the drainage spacing and displacement under different seepage conditions were obtained.And then the installation spacing for capillary drainage pipes was obtained.The research results were applied to engineering examples.The relationships between the installation spacing for capillary drainage pipes,the displacement and the drainage time were analyzed.The calculated values of displacement agreed well with the measured values,indicating that the method was reasonable and effective.

关 键 词：边坡 毛细透排水管 渗流模型 排水间距 设置间距 排水量 

分 类 号：U216.419.1[交通运输工程—道路与铁道工程]