道路结构内水分运动试验系统  

An Experiment System for Water in Road Structure

作　　者：周奇[1] 岑国平[2] 冯忠居[3] 谢红星[2] 

机构地区：[1]中国人民解放军94857部队58分队 [2]空军工程大学工程学院 [3]长安大学公路学院

出　　处：《公路》2013年第11期48-55,共8页Highway

基　　金：军队科研项目;项目编号KJYZ0804;总070710

摘　　要：应用LabVIEW语言和自动控制理论,首次研制出了一套道路结构内水分运动试验系统.系统包括4个部分：室内道路模型;人工降雨及控制系统;地下水位控制系统;道路结构内观测和记录系统.该系统可以实现人工模拟降雨、道路地下水控制和采集、道路土土壤含水率采集、盲沟流量采集等功能.试验结果显示：人工降雨系统的设计雨量和检测雨量的相对误差在4％以下;重现性、稳定性和降雨空间分布的均匀性在0.97以上;对于体积含水率在27％～42％之间的路基土,FDR计测量结果和烘干法测量结果的绝对误差在2％以内,相对误差在1％左右.该系统可以真实地模拟大气降雨和地下水位变化,可以用于研究在降雨和地下水位变化情况下道路结构内水分运动情况.An experiment system for water in road structure was developed based on the LabVIEW and auto-control theory for the first time.The system consists of an indoor road model,an auto-control system for artificial rainfall＇s simulation,an auto-control groundwater system,and an observation and recording system for water in road structure.The system can carry out rainfall simulation,observation and control of groundwater in road structure,observation of moisture in road base soil and flux of blind ditch.The results show that the relative deviation between designed precipitation and practical precipitation from artificial rainfalls system is below 4%; the fidelity,the stability of the system and the rainfall distributing are above 0.97; the absolute deviation of test results between FDR and the oven drying method is below 2%; the relative deviation is about 1% when volumetric water content rate ranges from 27% to 42%.It is suggested that the system simulate rainfall and movement of groundwater realistically and test the water movement in road structure when it rains or the groundwater changes.

关 键 词：道路工程 结构内水分 试验系统 LABVIEW语言 人工降雨 FDR 

分 类 号：U416.1[交通运输工程—道路与铁道工程]