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岩溶路基注浆质量瞬态瑞雷面波法检测数值模拟
引用本文:郑立宁,谢强,任新红,冯治国,赵文.岩溶路基注浆质量瞬态瑞雷面波法检测数值模拟[J].西南交通大学学报,2011(5):739-744,769.
作者姓名:郑立宁  谢强  任新红  冯治国  赵文
作者单位:西南交通大学土木工程学院;
基金项目:铁道部科技研究开发计划资助项目(2009G010-A); 中央高校基本科研业务费专项资金资助项目(SWJTU09CX014)
摘    要:为探讨瞬态瑞雷面波法用于铁路岩溶路基注浆质量检测的有效性,根据现场典型的地质断面特征,分别建立了无溶洞发育的两层介质起伏界面模型和有溶洞发育的两层介质起伏界面溶洞模型.通过改变数值模型中局部介质的物性模拟岩溶路基注浆前后的变化.用瞬态激振力模拟现场锤击振动,对比分析注浆前后地表检测点频散曲线的变化特征.研究结果表明:无溶洞发育时,注浆后频散曲线主要以波速提高为主;有溶洞发育时,注浆后频散曲线不仅波速提高,而且注浆前频散曲线的"之"字形扭曲现象消失,与现场检测结果基本一致.

关 键 词:岩溶路基  注浆质量  瞬态瑞雷面波  检测  数值模拟

Numerical Simulation of Grouting Effect Detection of Karst Roadbed Using Transient Rayleigh Wave Method
ZHENG Lining,XIE Qiang,REN Xinhong,FENG Zhiguo,ZHAO Wen.Numerical Simulation of Grouting Effect Detection of Karst Roadbed Using Transient Rayleigh Wave Method[J].Journal of Southwest Jiaotong University,2011(5):739-744,769.
Authors:ZHENG Lining  XIE Qiang  REN Xinhong  FENG Zhiguo  ZHAO Wen
Institution:ZHENG Lining,XIE Qiang,REN Xinhong,FENG Zhiguo,ZHAO Wen(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China)
Abstract:To investigate the effectiveness of the application of the transient Rayleigh wave method to the quality detection of grouting in karst roadbed,two numerical models were built from the characters of typical geology sections in the field.They are respectively for underground strata with or without karst cave,and the property of partial media in the models may be changed to simulate the variation of karst roadbed before and after grouting.The transient impact force was used to simulate hammer hitting vibratio...
Keywords:karst roadbed  grouting quality  transient Rayleigh wave  detection  numerical simulation  
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