察尔汗盐岩路基溶蚀数值模拟及病害分析  

Numerical Simulation and Disease Analysis of Qarhan Salt Rock Roadbed Corrosion

作　　者：张媛[1,2] 董建华[1,2] 

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050 [2]兰州理工大学甘肃省土木工程防灾减灾重点实验室,甘肃兰州730050

出　　处：《甘肃科学学报》2016年第1期99-104,共6页Journal of Gansu Sciences

基　　金：中铁西北科学研究院科研基金:青藏线盐湖路基溶蚀防治技术研究(H1204cc018)

摘　　要：为了研究察尔汗盐岩路基在渗流溶蚀作用下的特性,通过采用大型有限元软件ADINA中的结构模块与流体模块分别进行建模,最后将两者耦合进行流固耦合计算分析。并运用CT实验验证了数值模拟结论的正确性。结果表明:由于湖水渗入引起的路肩沉降、横向位移和路基内部有效应力均大于自重所引起的;路基两侧卤水水位差也是影响路基变形的主要因素;盐岩路基溶蚀病害主要因素包括岩溶、盐业生产和毛细水。In order to study the characteristics of Qarhan salt rock roadbed under the action of seepage and corrosion,we separately made modeling by adopting the structural module and fluid module in large finite element analysis software ADINA,and finally coupled the two for fluid-solid coupling calculation analysis.Besides,CT test was used to verify the correctness of numerical simulation conclusion.Results showed that：road shoulder settlement,lateral displacement and effective stress of inside roadbed are all greater than those caused by dead weight;The brine water head on the sides of roadbed is also a major factor of roadbed deformation;The disease factors causing the corrosion of salt rock roadbed include karst,salt industrial production and capillary water.The above conclusions can provide reference for defect control of salt rock roadbed.

关 键 词：盐岩路基 渗流溶蚀 ADINA CT 病害 

分 类 号：TU478[建筑科学—结构工程]