高速公路中央分隔带渗水规律三维数值模拟  

Three-dimensional numerical simulation on infiltration laws in the central saturated-unsaturated areas of expressway

作　　者：祝晓彬[1] 吴吉春[1] 陈景雅[2] 张健康[2] 高建新[2] 

机构地区：[1]南京大学地球科学与工程学院水科学系,南京210093 [2]江苏省交通规划设计院,南京210005

出　　处：《工程勘察》2010年第10期32-36,共5页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金项目(No.40702038;No.40725010)

摘　　要：以高速公路中央分隔带为例,采用三维有限元方法对饱和-非饱和带渗水规律进行数值模拟。分别设计两种不同模拟方案,第一方案是为检验已存在隔、排水措施的性能,计算中央分隔带底部设置的排水管流出的水量;第二方案是假定中央分隔带现有隔、排水措施不存在的情况下,中央分隔带顶部入渗水量引起天然潜水面上升的高度,模拟饱和-非饱和界面的运移过程。两种不同模拟方案的计算结果为中央分隔带的隔、排水设计提供了理论依据,同时对其它饱和-非饱和带渗水规律的研究具有借鉴和类比意义。The infiltration in the saturated-unsaturated area is studied by taking the medial strips of expressway as an example. The two kinds of simulation schemes are designed. The first scheme is used to calculate the water discharge from the drain lines setting at the bottom of the medial strips in order to check the behaviors of the drainage measures. The second scheme is used to calculate the rise height of the natural water level caused by the infiltration from the top of the medial strips when the drainage measures don＇t exist. The simulation results provide the theoretical bases for designing the inner drains and the membrane barriers. The study could be used for reference and compared with other flow studies from the saturated-unsaturated areas in different places.

关 键 词：三维数值模拟 中央分隔带 渗水 

分 类 号：P641.2[天文地球—地质矿产勘探]