常规物探技术在房损成因地质调查中的应用

Application of Conventional Geophysical Technology in Geological Investigation of House Cracks

论文通过分析沙河市新城镇东北部村民宅损裂成因,依据该区地球物理特征,采用了浅层地震勘探和高密度电阻率成像技术对成因进行了勘探调查。结果显示,岩溶地层浅埋区域,局部浅层地下水与下部岩溶贯通,大部分岩溶裂隙区域目前相对稳定。上覆第四系地层相对较薄,地表径流能够沿奥陶系岩溶裂隙发育地层形成地下水垂向径流发育带,推测这些因素与研究区民宅损裂成因具有一定的因果关系。依据物探异常成果数据,共划分出5处地下岩溶裂隙发育区域和1个浅层水位降落漏斗区域。在前期资料收集、地面调查的基础上,通过调查分析该区房损成因及地灾形成机理,为灾害防治选择有针对性的施工方法提供科学地质依据。

In this paper,through the analysis of the causes of the damage and fracture of residential buildings in a research area,according to the geophysical characteristics of the area,the shallow seismic exploration and high-density resistivity imaging technology are used to investigate the causes.The results show that in the shallow buried area of karst stratum,the local shallow groundwater is connected with the lower karst,and most of the karst fracture areas are relatively stable at present.The overlying Quaternary strata are relatively thin,and the surface runoff can form a vertical groundwater runoff Development Zone along the Ordovician karst fissure developed strata.It is speculated that these factors have a certain causal relationship with the causes of residential damage and cracking in the study area.According to the data of geophysical anomalies,five underground karst fracture areas and one shallow water level depression funnel area are divided.On the basis of preliminary data collection and ground investigation,through the investigation and analysis of the causes of house damage and the formation mechanism of geological disasters,scientific geological basis is provided for the selection of targeted construction methods for disaster prevention and control.