多道瞬态面波法在铁路路基测试中的应用  

MSASW method appling in inspecting railroad subgrade

作　　者：李杰生[1] 钱春宇[1] 廖红建[1] 

机构地区：[1]西安交通大学土木工程系,陕西西安710049

出　　处：《岩土力学》2003年第S2期611-615,共5页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(编号:50149017)

摘　　要：既有线路路基提速判识的关键在于对现有路基状况进行测试,测试路基力学参数沿深度的分布。然而,在铁路正常运营条件下,常规测试方法如K30试验、静力触探方法等很难实施。笔者提出直接在铁路石碴上采用瞬态面波(MSASW)测试路基的频散特性,反演路基的面波频散特性得出路基的力学参数分布,然后,根据实测的路基强度值进行提速判识。Its important to investigate the mechanical parameters distribution of the built railroad subgrade along the depth. The application of the traditional test methods such as K30 test、static penetration test, on the condition is very difficult. So, we advance to test on the ballast directly by MSASW method. The mechanical parameters distribution can be inverted on the base of dispersion curve of the subgrade tested by the MSASW method. Finally how high speed the locomotive can run on the base of the roadbed strength got from this method.

关 键 词：路基测试 瞬态面波法 铁路路基提速判识方法 

分 类 号：U213.15[交通运输工程—道路与铁道工程]