高速公路不同地层路基中岩溶洞穴的探测

来源期刊：中南大学学报(自然科学版)2004年第6期

论文作者：陈灿华 廖秀英 陈绍裘

文章页码：1014 - 1018

关键词：工程探测;岩溶洞穴;高速公路

Key words：engineering exploration; karst; highway

摘    要：采用三极与对称四极电阻率测深探测常张和邵怀高速公路路基中一定深度范围内的岩溶洞穴,沿公路走向布设多条互相平行的电测深剖面进行观测,利用各电测深剖面中电阻率 ρ_s曲线类型的变化,确定岩溶洞穴的分布情况;利用测区内各剖面的ρ_s等值线断面图,结合地质条件圈定岩溶洞穴在路基中的赋存部位。通过对常张、邵怀高速公路路基的探测,确定了其地下岩层的结构构造,并判断出岩溶洞穴的埋深、规模及性质,了解了其不同地层中岩溶的电性结构的特点和分布规律。

Abstract: Through the exploration in Chang-Zhang and Shao-Huai highway by using the three-pole and symmetrical four-pole resistivity sounding to explore their karsts, the distribution of the karsts, the fluctuation of the bedrock, the change of the structure and the electrical layer in different depths along the plane section was generally ascertained according to the type of the resistivity sounding ρ_s curve. Combined with the geological conditions, the mode of occurrence of the karsts in the roadbed was circled. The frame and structure of the rock layer and the depth and scale and property of the karst were ascertained. Meanwhile, the characteristic and distribution laws of the electrical frame of the karst in different strata were clearly explained.