高密度电法在岩溶勘察中的应用

Application of High Density Electrical Method to Karst Exploration

研究区内主要为灰岩出露,造成区内溶蚀现象较为普遍。多数情况下为裂隙岩溶,与断裂、节理密集带分布有关。溶隙几十厘米宽,沿断裂和节理带走向发育;在地下水汇集区和断裂交汇处,时常有较大溶洞发育。隐伏溶洞对于隧道、桥基、路基有潜在的危害,容易引发岩溶陷落、涌水等病害。断裂构造复合的部位,岩溶发育强烈,饱水,是最易发生工程事故的部位,会严重地影响到工程质量与施工进度。本文分析了高密度电法的原理与野外工作方法,通过应用实例说明高密度电法在岩溶勘察中的作用。

It is quite common there is corrosion in the limestone region,which results in bad geological conditions such as the fracture-karst in most cases.Corrosion phenomenon is closely related to fracture and joint distribution of dense zone.Karst fissures output along the toward of fault and joints zone which are tens of centimeters wide generally and there will be often some larger cavities in the junction of groundwater collection zones and fractures.Hidden caves with tunnels,bridges base and roadbed have potential hazards,and karst is apt to cause the fall of gushing water and other diseases.Faults,strong karst development,saturated water are easy to cause accidents in engineering construction.This paper analyzes the principle of high-density electrical method and field work method and proves that high density electrical method used in the karst exploration has good practical result.