【摘要】 岩溶发育情况对于桥梁基础方案的确定十分重要。覆盖型岩溶和埋藏型岩溶,由于埋藏于地下,加强对钻孔中溶洞的分析,对于查明桥址区岩溶的特征有重要的指导意义。根据湖南省某高速公路大桥逐桩钻探48个钻孔的成果,详细分析了钻孔中灰岩面起伏、溶洞顶板高程、溶洞底板高程、溶洞顶板和灰岩面的距离、溶洞底板和灰岩面的距离、钻孔中溶洞总高度、岩溶率、钻孔遇洞率等多个指标的统计特征,评价了各个指标对岩溶发育特征的指示作用。更多还原

【Abstract】 Karst development at the bridge sites is a key factor controlling the bridge foundation types.It is of great importance to understand the characteristics of buried karst/covered karst at the bridge sites by investigating the karst caves discovered from the boreholes.Based on the data from 48 boreholes drilled for the construction of an expressway bridge in Hunan Province,multiple index such as the karst topography,top and bottom elevation of the caves,depth of the caves relative to the karst topography,total height of the caves discovered in the boreholes,karst rate,and so on,are statistically analyzed to evaluate the corresponding indicative function of each index on the characteristics of karst development at the sites.更多还原