地质雷达法在岩溶建筑场地精细化探测的应用研究

Application of ground penetrating radar method in fine detection of karst construction sites

常规的勘察钻探方法主要是利用钻探资料查明建筑场地下地质情况,可以直接获得地下地层地质资料等信息,而实际钻探工程中需要钻探的资料数量和其布置往往在空间上有所限制,尤其在复杂的岩溶地区条件下一些重要的深部地质条件和特征非常有可能被钻探人员错过.利用地质雷达的探测快速、成果数据分析可视的技术优点对云南省昆明市某大型建筑场地岩溶岩层进行密集探测,取得了岩溶在基础下方10.0 m深度范围内的岩溶空间和分布的详细地质资料,后期的数据处理主要是采用先进的深度切片分析技术,将场地岩溶准确地呈现在基础下方不同深度的平面上,结合后期数据处理、针对所探测的场地岩溶的空间、钻探数据等资料,详细和准确地呈现出场地岩溶在基础下方的空间分布情况,为后期的岩溶处理提供了准确详实的地质资料.

Conventional survey and drilling methods mainly use drilling data to find out the geological conditions under construction sites,which can directly obtain geological information of underground strata.However,the amount and arrangement of drilling data in actual drilling projects are often limited in space,especially in complex karst areas,where some important deep geological conditions and features are likely to be missed by drilling personnel.This paper mainly uses the technical advantages of rapid detection by geological radar and visual analysis of results data to carry out intensive detection of karst strata in a large construction site in Kunming,Yunnan Province.Detailed geological data of karst space and distribution within a depth range of 10.0 m below the foundation have been obtained.In the later stage of data processing,advanced depth slice analysis technology is mainly used to accurately present the site karst on different depth planes below the foundation.Based on the data processing in the later stage,the space of karst in the site detected,drilling data and other data,the spatial distribution of karst in the site below the foundation is presented in detail and accurately,providing accurate and detailed geological data for karst processing in the later stage.