西安地裂缝活动特征的自动监测及其影响因素分析  

Automatic monitoring of ground fracture activity characteristics and analysis of influencing factors in Xi'an

作　　者：强菲 张红强 李勇 卢全中 陶虹[1,4] 袁喜东 QIANG Fei;ZHANG Hongqiang;LI Yong;LU Quanzhong;TAO Hong;YUAN Xidong(Observation and Research Station of Ground Fissure and Land Subsidence,Ministry of Natural Resources,Xi’an 710054,China;Shaanxi Institute of Geo-Environment Monitoring,Xi’an 710054,China;College of Geology Engineering and Geomatic,Chang’an University,Xi’an 710054,China;Shaanxi Institute of Geological Survey,Xi’an 710054,China)

机构地区：[1]自然资源部陕西西安地裂缝与地面沉降野外科学观测研究站,陕西西安710054 [2]陕西省地质环境监测总站(陕西省地质灾害中心),陕西西安710054 [3]长安大学地质工程与测绘学院,陕西西安710054 [4]陕西省地质调查院,陕西西安710054

出　　处：《上海国土资源》2023年第4期26-31,共6页Shanghai Land & Resources

基　　金：陕西省自然资源生态修复保护专项资金项目特大城市(西安)缓变型地质灾害预警研究。

摘　　要：西安是我国地裂缝地质灾害集中发育的地区之一,采用MD系列断层活动测量仪对西安f7地裂缝东段进行了长期三维活动自动化监测,监测结果显示:自2002年以来,西安f7地裂缝东段历年平均活动量和累计活动量水平拉张活动量最大,水平扭动活动量次之,垂直活动量最小;垂直方向呈上盘相对下降,水平方向呈水平挤压和水平右旋;年平均值呈逐年减小趋势并趋于停止;地裂缝活动具有年度周期性规律,与降雨等因素相关;总体来看,该段地裂缝活动可分为6个阶段,每个阶段呈现出不同的活动特征;地下水位和降雨量主要影响地裂缝垂直活动。断层活动测量仪在地裂缝监测方面可实现监测的实时性和准确性,对地裂缝地质灾害监测与防治具有推广应用意义。Xi’an is one of the regions that geologic hazards of ground fissures are concentrated in China.Three-dimensional automatic long-term monitoring of the eastern section of f7 ground fissure is carried out by using MD Series fault activity measuring instrument.Some significant monitoring results are obtained.Both characteristics of average activity over the years and cumulative activity of the ground fracture since 2002 indicate that the horizontal tensile deformation of the ground fracture is the largest,the horizontal torsion deformation is the second and the vertical deformation is the least.The hanging wall of ground fissure descends relatively in the vertical direction.Horizontal direction has obvious characteristics of horizontal extrusion and horizontal dextrorotation.Annual average activity over the years shows a decreasing trend and the 3D deformations of ground fissure tend to stop.The activity of ground fissures has annual periodicity,which is related to rainfall and other factors.In general,the ground fissure activity can be divided into six stages of different activity feature.Groundwater level and rainfall mainly affects vertical deformation.The fault activity measuring instrument can realize the real-time and accuracy of ground fracture monitoring which has popularization and application significance to the monitoring and prevention of ground fissure.

关 键 词：地裂缝 活动特征 影响因素 断层活动测量仪 

分 类 号：P642[天文地球—工程地质学]