成贵铁路工程环境与线路选线设计
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摘要
研究目的:成贵铁路是复杂艰险山区高速铁路之一,穿越四川盆地向云贵高原攀升的斜坡过渡带,经过四川盆地南缘断褶带、滇东北崇山峻岭及贵州高原西北地区,沿线具有"矿藏多、采空区多、天然气多、峡谷多,地质构造发育、岩溶发育、重力不良地质发育、岩盐发育"的"四多、四发育"特点,地质、地形、环境极为复杂。本文在"地形选线"、"地质选线"、"环保选线"、"重大工程优先选址"的基础上,贯彻"减灾选线"理念,从工程建设源头做好地质灾害风险规避、防控工作;贯彻一县(市)一站、站城融合理念,尽力打造生态工程。研究结论:(1)沿线控制线路走向的主要因素有地形地貌、重点桥隧工程、城市规划、环境敏感区和煤矿采空区、岩溶、天然气等不良地质发育区;(2)线路最大坡度,一般20‰,困难25‰,个别30‰;(3)本研究成果可供复杂艰险山区铁路、公路工程建设借鉴。
Research purposes: The Chengdu-Guiyang Railway is one of the high-speed railways located in complicated mountain area,whose alignment traverses the transition zone from Sichuan Basin and up towards Yunnan-Guizhou Plateau,which passes across fault-fold zone in southern part of Sichuan Basin,the mountain area of northeast Yunnan and the Northwestern part of Guizhou Plateau. The major characteristics of the alignment include abundant mine reserves,several goaf zones,rich gas resources,plentiful valley areas and process of geologic structure,karst,adverse geological condition and rock salt,which indicates its complicated environmental condition. The most important part of engineering project is to avoid potential construction and operation risk by analyzing impact factors from the very beginning of the route selection phase in order to ensure the alignment technically and economically feasible. Thus,the paper mainly demonstrates the design concept of the route selection for less potential risk based on conventional design disciplines including route selection considering geology, geography, environment and major construction project conditions,which could make the geological risk controllable and even evitable, and implement the concept of integration of one county( city) and one station to create ecological engineering.Research conclusions:( 1) The main factors controlling the route alignment include topography and landform,key bridge and tunnel projects,urban planning,environmentally sensitive areas,goaf areas of coal mines,karst areas,natural gas and other unhealthy geological zones.( 2) The maximum slope of the line is 20‰ in general,25‰ in difficulty and 30‰ in some cases.( 3) The research results can be used for reference for railway and highway construction in complex and dangerous mountainous areas.
Research purposes: The Chengdu-Guiyang Railway is one of the high-speed railways located in complicated mountain area,whose alignment traverses the transition zone from Sichuan Basin and up towards Yunnan-Guizhou Plateau,which passes across fault-fold zone in southern part of Sichuan Basin,the mountain area of northeast Yunnan and the Northwestern part of Guizhou Plateau. The major characteristics of the alignment include abundant mine reserves,several goaf zones,rich gas resources,plentiful valley areas and process of geologic structure,karst,adverse geological condition and rock salt,which indicates its complicated environmental condition. The most important part of engineering project is to avoid potential construction and operation risk by analyzing impact factors from the very beginning of the route selection phase in order to ensure the alignment technically and economically feasible. Thus,the paper mainly demonstrates the design concept of the route selection for less potential risk based on conventional design disciplines including route selection considering geology, geography, environment and major construction project conditions,which could make the geological risk controllable and even evitable, and implement the concept of integration of one county( city) and one station to create ecological engineering.Research conclusions:( 1) The main factors controlling the route alignment include topography and landform,key bridge and tunnel projects,urban planning,environmentally sensitive areas,goaf areas of coal mines,karst areas,natural gas and other unhealthy geological zones.( 2) The maximum slope of the line is 20‰ in general,25‰ in difficulty and 30‰ in some cases.( 3) The research results can be used for reference for railway and highway construction in complex and dangerous mountainous areas.
引文
[1]岳志勤,丁浩江,苏培东,等.成贵铁路川南、川西南浅层天然气勘察[J].铁道工程学报,2015(3):1-5.Yue Zhiqin,Ding Haojiang,Su Peidong,etc. Survey of Shallow Layer Natural Gas in Chengdu-Guiyang Railway of South Sichuan and Southwest Sichuan[J].Journal of Railway Engineering Society,2015(3):1-5.
[2]中铁二院工程集团有限责任公司.新建铁路成都至贵阳线乐山至贵阳段可行性研究[R].成都:中铁二院工程集团有限责任公司,2009.China Railway Eryuan Engineering Group Co. Ltd. The Feasibility Study Report of Leshan-Guiyang Section of Proposed Chengdu-Guiyang Railway Line[R].Chengdu:China Railway Eryuan Engineering Group Co. Ltd,2009.
[3] TB 10621—2014,高速铁路设计规范[S].TB 10621—2014,Code for Design of High Speed Railway[S].
[4]桂金祥,岳志勤.成贵铁路观音山隧道水文地质勘察与选线[J].铁道工程学报,2016(8):22-25.Gui Jinxiang,Yue Zhiqin. The Hydrogeology Survey and Line Selection for the Guanyinshan Tunnel of Chengdu-Guiyang Railway[J]. Journal of Railway Engineering Society,2016(8):22-25.
[2]中铁二院工程集团有限责任公司.新建铁路成都至贵阳线乐山至贵阳段可行性研究[R].成都:中铁二院工程集团有限责任公司,2009.China Railway Eryuan Engineering Group Co. Ltd. The Feasibility Study Report of Leshan-Guiyang Section of Proposed Chengdu-Guiyang Railway Line[R].Chengdu:China Railway Eryuan Engineering Group Co. Ltd,2009.
[3] TB 10621—2014,高速铁路设计规范[S].TB 10621—2014,Code for Design of High Speed Railway[S].
[4]桂金祥,岳志勤.成贵铁路观音山隧道水文地质勘察与选线[J].铁道工程学报,2016(8):22-25.Gui Jinxiang,Yue Zhiqin. The Hydrogeology Survey and Line Selection for the Guanyinshan Tunnel of Chengdu-Guiyang Railway[J]. Journal of Railway Engineering Society,2016(8):22-25.