汤郎—易门深大活动断裂对秀宁隧道围岩改造作用分析
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摘要
秀宁隧道为改建铁路成昆线广通至昆明段扩能改造工程中全线关键控制性工程,隧道出口段的汤郎—易门晚更新世区域性深大活动断裂控制了全隧的地形地貌、地质构造、地下水系及不良地质等,对全隧的围岩改造作用十分显著。本文基于汤郎—易门断裂的活动特性及展布,在探讨断裂对全隧地层岩性、岩体结构、地下水活动、应力场环境等影响的基础上,研究活动断裂对秀宁隧道围岩分级改造作用的影响,以期为隧道设计和施工提供较准确的地质科学依据。研究结论:(1)秀宁隧道具有复杂的区域地质构造环境、多变的地层岩性及复杂的水文地质环境特征;(2)汤郎—易门断裂具有多期次活动构造活动特征;(3)断裂对围岩的改造作用主要体现在岩性及其力学性质、岩体结构及裂隙、地下水活动、初始应力场环境4个方面。
Xiuning tunnel is the key control engineering project of the reconstructed Guantong-Kunming railway,and the terrain and landform,geological structure,groundwater system and unfavorable geology of the tunnel are controlled by the Late Pleistocene Tanglang-Yimen regional territorial active faults and the surrounding rock of tunnel are significantly reformatted by it. Based on the activity characteristics and distribution of the faults,the stratigraphic lithology,rock structure,groundwater active,stress field environment of tunnel affected by the active faults are analyzed,the surrounding rock reformation impacted by the faults is researched, and more accurate geological basis for the design and construction of the tunnel is provided. The research concludes that( 1) Xiuning Tunnel is characterized by complex regional geological tectonic environment,changeful stratigraphic and lithology and complex hydrogeological environment;( 2) Tanglang-Yimen faults are characteristic of multistage tectonic activity;( 3) the effects of the faults on surrounding rock reconstruction are mainly embodied in the lithology and its mechanical properties,rock mass structure and fracture,groundwater activity and initial stress field environment
Xiuning tunnel is the key control engineering project of the reconstructed Guantong-Kunming railway,and the terrain and landform,geological structure,groundwater system and unfavorable geology of the tunnel are controlled by the Late Pleistocene Tanglang-Yimen regional territorial active faults and the surrounding rock of tunnel are significantly reformatted by it. Based on the activity characteristics and distribution of the faults,the stratigraphic lithology,rock structure,groundwater active,stress field environment of tunnel affected by the active faults are analyzed,the surrounding rock reformation impacted by the faults is researched, and more accurate geological basis for the design and construction of the tunnel is provided. The research concludes that( 1) Xiuning Tunnel is characterized by complex regional geological tectonic environment,changeful stratigraphic and lithology and complex hydrogeological environment;( 2) Tanglang-Yimen faults are characteristic of multistage tectonic activity;( 3) the effects of the faults on surrounding rock reconstruction are mainly embodied in the lithology and its mechanical properties,rock mass structure and fracture,groundwater activity and initial stress field environment
引文
[1]中国地震局地壳应力研究所.广通-昆明铁路重点工程场地地震安全性评价及工程场区地震动参数区划报告[R].北京:中国地震局地壳应力研究所,2007.
[2]中铁二院工程集团有限责任公司.成昆线广通至昆明段扩能改造工程安禄隧道区域水文地质专题研究报告[R].成都:中铁二院工程集团有限责任公司,2008.
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[5]邵汝君.构造对区域地下水演化控制机制及地下水系统研究[D].武汉:中国地质大学,2007.
[6]杨会峰,张发旺,王贵玲,等.构造对宁南地下水系统控制作用研究[J].南水北调与水利科技,2008(10):45-49.
[7]尚友磊.斗篷山隧道不良地质分析及施工整治技术[J].高速铁路技术,2014(6):94-99.
[8]陈子光.岩石力学性质与构造应力场[M].北京:地质出版社,1984.
[9]谷德振.岩体工程地质力学基础[M].北京:科学出版社,1983.
[10]王思敬,杨志法,刘竹华.地下工程岩体稳定性分析[M].北京:科学出版社,1984.
[11]赵亢,杨其新,蒋雅君.关垭子隧道软弱围岩大变形机理分析[J].铁道标准设计,2015,59(10):114-118.
[12]左昌群.变质岩地区隧道围岩分级方法研究—以十漫高速公路隧道为例[D].武汉:中国地质大学,2008.
[13]中华人民共和国铁道部.TB10012—2007铁路工程地质勘察规范[S].北京:中国铁道出版社,2007.
[14]吴治生,张杰.岩溶隧道地质构造与围岩等级的划分[J].铁道工程学报,2012(4):6-12.
[15]张广泽.乌鞘岭隧道F7断层围岩工程特性及工程措施研究[J].铁道标准设计,2005(9):24-28.
[2]中铁二院工程集团有限责任公司.成昆线广通至昆明段扩能改造工程安禄隧道区域水文地质专题研究报告[R].成都:中铁二院工程集团有限责任公司,2008.
[3]孙家聪,颜以彬,张文源.滇中地区罗茨-易门断裂带的发生、发展及其对铁矿的控制作用[J].昆明工学院学报,1988(3):79-87.
[4]刘辉.两郧大断裂区域隧道围岩稳定性分析[D].武汉:中国地质大学,2008.
[5]邵汝君.构造对区域地下水演化控制机制及地下水系统研究[D].武汉:中国地质大学,2007.
[6]杨会峰,张发旺,王贵玲,等.构造对宁南地下水系统控制作用研究[J].南水北调与水利科技,2008(10):45-49.
[7]尚友磊.斗篷山隧道不良地质分析及施工整治技术[J].高速铁路技术,2014(6):94-99.
[8]陈子光.岩石力学性质与构造应力场[M].北京:地质出版社,1984.
[9]谷德振.岩体工程地质力学基础[M].北京:科学出版社,1983.
[10]王思敬,杨志法,刘竹华.地下工程岩体稳定性分析[M].北京:科学出版社,1984.
[11]赵亢,杨其新,蒋雅君.关垭子隧道软弱围岩大变形机理分析[J].铁道标准设计,2015,59(10):114-118.
[12]左昌群.变质岩地区隧道围岩分级方法研究—以十漫高速公路隧道为例[D].武汉:中国地质大学,2008.
[13]中华人民共和国铁道部.TB10012—2007铁路工程地质勘察规范[S].北京:中国铁道出版社,2007.
[14]吴治生,张杰.岩溶隧道地质构造与围岩等级的划分[J].铁道工程学报,2012(4):6-12.
[15]张广泽.乌鞘岭隧道F7断层围岩工程特性及工程措施研究[J].铁道标准设计,2005(9):24-28.
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