基于高密度电阻率法的惠阳约场塌陷灾害研究

结合地质资料和水文工程地质条件，以高密度电阻率法为基础建立研究体系，依据电性特征详细分析惠阳约场地区可溶岩埋藏特征，确定导致塌陷原因的同时预测具有潜在塌陷危险的区域。由于该区可溶岩为早石炭纪石磴子组灰岩、结晶灰岩、大理岩和白云质大理岩，分布广泛并被第四纪松散堆积物所覆盖，其塌陷灾害主要诱因为岩溶地质作用，研究37条测线的55个断面，预测并固定隐伏灾害点47处，强溶蚀区39处，强溶蚀落水洞5处。针对岩溶发育程度的不同，以区、带、段三个层讨论地基稳定性．戋嵋分可溶岩和非可溶岩分布区。

Research on geologic collapse hazards in Yuechang of Huiyang based on high-density resistivity method

Combining with geologic information and conditions of hydrogeology and engineering geology, according to the buried feature of soluble rocks in the Yuechang district of Huiyang City by electric characters determined the reason leading to collapse, the authors established a research system based on high-density resistivity method, and predicted some areas with potential collapse danger. The soluble rocks are Early Carboniferous Shidengzi Formation limestone, crystal limestone, marble and dolomitic marble, which are distributed widely and covered by the Quaternary unconsolidated sediments. The main reason of collapse catastrophe is karst geologic process. Through 55 cross-sections of 37 surveying lines, 47 concealed casualty points, 39 high erosion areas and high erosion down caves are forecasted and defined. According to the different karst developing degrees, the base stabilization is discussed respectively with three hiberarchies in district and tape as well as section; the boundary between soluble and insoluble rock districts is divided in the studied area.