利用多道面波勘探技术调查路基岩溶地质条件

Investigation of Subgrade Karst Geological Condition Using Multi-channel Transient Surface Wave Exploration Technology

多道瞬态瑞雷面波勘探技术近年来在工程地质勘察中得到广泛应用。本文在简要介绍多道瞬态瑞雷面波勘探野外数据采集以及室内数据处理方法的基础上,利用该方法对合福高铁某段路基强风化钙质页岩中初期岩溶注浆效果进行评价。选取合适采集参数并利用f-k法和相位差法联合提取频散曲线,解决了岩体破碎等不良地质条件对数据质量的影响,从而在一定程度上提高纵、横向分辨率。通过与现场实际情况对比验证分析,表明该方法在强风化路基岩溶地质调查中应用效果显著。

Multi--channel transient Rayleigh surface wave exploration technology has been effectively used in engineering geological exploration for many years. Based on the intro- duction of data collection and data disposing of multi--channel transient Rayleigh surface wave exploration technology, the method was used to estimate the early karst grouting of Hefu high--speed railway calcareous shale roadbed which was highly weathered. It solved poor geologic conditions such as rock crushing effects on data quality and improved the res- olution ratio in vertical and horizontal directions at some extent by choosing appropriate pa- rameter and using of multi--channel analysis of surface waves （MASW） and spectral analy- sis of surface waves （SASW） for picking up dispersion curve in date processing. Through a comparative analysis of actual situation on the spot, it indicates that the effect of the meth- od applied in weathering rock subgrade in Karst geological survey is obvious.