西延高铁铜川北矿区四维地质综合选线研究  

Study on Four-dimensional Geological Comprehensive Route Selection in Tongchuan North Mining Area of Xiyan High-speed Railway

作　　者：张哲 Zhang Zhe(State Key Laboratory of Rail Transit Engineering Informatization(FSDI),Xi'an 710043,China)

机构地区：[1]轨道交通工程信息化国家重点实验室(铁一院),西安710043

出　　处：《科技通报》2023年第11期90-94,共5页Bulletin of Science and Technology

摘　　要：采空沉陷区分布面积广、沉陷范围大,是西安至延安高速铁路铜川段存在的主要工程地质问题,对线路在该段的具体走向有着重要影响。为确保高速铁路线路走行在安全、稳定的区域,保证后期高铁施工、运营安全,本文在采矿历史资料调查和工程地质情况勘察的基础上,结合煤矿终采时间稳定性分析和基于InSAR(interferometric synthetic aperture radar)数据的时间变形分析,研究提出四维地质综合选线策略。选线之初应以采空区平面位置、深度为边界条件,选取适宜的岩层边界角,确定煤矿采空的空间影响边界。分析论证线路通过区域在时间维度上的稳定性,进一步确保线路选线的安全。本线为时速350 km/h的高速铁路,采用无砟轨道,后期对施工、运营期间对沉降变形要求极高,因此在勘察选线期间应多维考虑,确保线路后期施工、运营安全,本文研究成果对同类型区域内的线路选线上具有重大指导意义。The wide distribution area and large subsidence range of goaf subsidence areas are the main engineering geological problems in Tongchuan Section of Xi'an Yan'an High speed Railway,which have an important impact on the specific direction of the line in this section.In order to ensure that the high-speed railway line is in a safe and stable area,and ensure the safety of high-speed railway construction and operation in the later period,this paper proposes a four-dimensional geological comprehensive route selection strategy based on the investigation of mining historical data and engineering geological conditions,combined with the stability analysis of the final mining time of the coal mine and the time deformation analysis based on InSAR(interferometric synthetic aperture radar)data.At the beginning of the route selection,the plane position and depth of the goaf shall be taken as the boundary conditions,and the appropriate boundary angle of the rock stratum shall be selected to determine the spatial influence boundary of the coal mine goaf.Analyze and demonstrate the stability of the area where the line passes in the time dimension to further ensure the safety of line selection.This line is a high-speed railway with a speed of 350 km/h,and ballastless track is adopted.In the later stage,there is a high requirement for settlement deformation during construction and operation.Therefore,multi-dimensional considerations should be taken during the survey and route selection to ensure the safety of the later construction and operation of the line.The research results in this paper have great guiding significance for the route selection in the same type of areas.

关 键 词：高速铁路 四维地质 综合分析 铜川北矿区 采空沉降 地质选线 

分 类 号：U212.2[交通运输工程—道路与铁道工程]