宋庄地裂缝是北京地区最新发现的一条破坏性较大的地裂缝,对北京城市副中心地区人民生活和生产造成很大威胁。本文依据前人在研究区已有资料,结合本次研究区开展的高密度电法和槽探工作,对宋庄地裂缝开展浅层探测研究,确定地裂缝深度、位置及破裂模式。结果显示:地裂缝深度约0m-30m之间,高密度电法反演裂缝倾向与调查地裂缝沿线房屋墙体开裂错动现象吻合,槽探验证地裂缝以拉张破裂模式,未发生地表错动现象。此次研究工作为北京城市副中心建设提供地质技术支持。
The latest discovered ground fissure in Songzhuang is very destructive,presenting a great threat to the people and critical infrastructure of the sub-center of Beijing.Based on work from previous studies,this thesis presents research into the shallow exploration of the ground fissure,confirming the depth,location,and burst mode of the ground fissure,by combining with the research methods of high-density resistivity analysis and trenching.The depth of ground fissures is determined to vary from0to30m,and the tendency of the high-density electrical method parameter inversion of the fracture is consistent with the phenomenon of wall cracks on buildings.In tensile crack mode,the ground fissure is verified by trenching,as there is no occurrence of surface dislocation.This study provides technical support for the construction of the sub-center in Beijing.