摘要
研究目的:新建包银高铁内蒙段大部位于河套平原内,仅在乌海境内穿越甘德尔山,该区地震烈度高,地质构造复杂,第四系活动断裂、基岩节理裂隙发育,长大裂隙充填铅锌矿且部分段落存在不规则采空,增大了地质选线的难度。为查明区域断裂构造分布特征、铅锌矿采矿分布范围,研究采用地质遥感、物探、地质调绘、钻探相结合的综合勘探方法,开展区域不良地质辨识工作,为地质选线提供基础资料。研究结论:(1)采用地质遥感判释结合现场调查的方式圈定了甘德尔山西缘活动断裂的边界,建议线路以路基形式通过山前活动断裂;(2)查清了甘德尔山体长大断裂构造及铅锌矿采空区分布特征,对甘德尔山区隧道方案进行综合比选,东侧完全绕避采空区方案断裂构造较简单,围岩状况相对较好,且绕避了山体内铅锌矿采空区,整体要优于平面穿采空区纵断面绕避方案和西侧完全绕避采空区方案;(3)本研究结果可应用于山区铁路地质选线工作。
Research purposes: The Inner Mongolia section of the new high-speed railway from Baotou to Yinchuan is located in Hetao plain and only passes through Gander mountain in Wuhai. In this area,the earthquake intensity is high,the geological structure is complex,Quaternary active faults,rock joints and fissures are developed,the large fissure are filled with lead-zinc ore and the irregular mining exists in some sections,which increase the difficulty of geological line selection. In order to find out the distribution characteristics of regional fault structure and the distribution range of lead-zinc ore mining,a comprehensive exploration method combining geological remote sensing,geophysical prospecting,geological mapping and drilling was studied to carry out the work of regional bad geological identification and provide basic data for geological line selection.Research conclusions:( 1) The boundary of the active fault along the west side of Gander mountain is delineated by combining geological remote sensing interpretation with field investigation. It is suggested that the route should pass through the active fault in the form of roadbed.( 2) The main fault structure and gob distribution characteristics of lead-zinc mine in Gander mountain were investigated,the comprehensive comparison of the tunnel scheme in Gander mountain area was carried out: The fault structure on the east side is relatively simple and the surrounding rock condition is relatively good which avoids the goaf of lead-zinc ore in the mountain. The overall scheme is better than that on the plane cutting through the goaf and that on the west side.( 3) The research results can be widely applied to railway geological route selection in mountainous areas.
作者
储文静
CHU Weiying(China Railway Design Corporation,Tianjin 300142,China)
出处
《铁道工程学报》
EI
北大核心
2020年第6期5-9,共5页
Journal of Railway Engineering Society
基金
中国铁设地路院科技开发一般课题(721864)。
关键词
活动断裂
工程地质
地质选线
研究
active fracture
engineering geology
geological line selection
research
作者简介
储文静,1983年出生,男,高级工程师。
