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地下水长期作用于灰岩裂隙往往使岩溶或破碎带更加发育,形成地下溶洞,给工程建筑安全带来极大的隐患和危险。为了查明建筑基地岩溶分布及发育情况,根据岩溶与其周围介质的电性差异,综合运用高密度电阻率法和瞬变电磁法,探测武汉市江夏区一新建小区场地的地下地质结构。实践表明,综合物探方法的应用,其探测效果可以起到互相验证及互相补充的作用,可为建筑工程提供不同深度可靠的、精确的地下地质基础资料。
Long-term action of groundwater on limestone fractures tends to make karst or fractured zone more developed, forming underground caves, which bring great hidden danger and danger to the safety of engineering construction. In order to find out the distribution and development of karst in the construction basement, the underground geologic structure of a newly built residential area in Jiangxia district of Wuhan City was probed according to the difference of electrical properties between karst and the surrounding medium by using high-density resistivity method and transient electromagnetic method. Practice shows that the application of integrated geophysical methods, the detection effect can play each other to verify and complement each other, for the construction of different depths of reliable, accurate information of the underlying geological foundation.