远安至保康支线铁路一期工程线路方案研究

Control Division of Railway Subgrade Engineering Based on Slope Stability

远安至保康支线铁路位于鄂西山地荆山山脉东南边缘,该区域地形起伏较大,断层和岩溶较发育,生态红线较多。本文基于先大后小、先整体后局部的思路结合复杂山区铁路选线的相关理念,充分考虑矿区分布、工程地质、环境敏感区、建设条件及工程投资等因素,研究了远安至保康支线铁路线路接轨方案、CK21+300~CK30+350段局部线路方案及店垭站位方案。研究结果表明:新开徐家冲线路所接轨东线方案线路顺直,工程条件好、施工难度及风险小,对矿区及黄柏河流域保护区影响较小,推荐远保支线铁路采用徐家冲线路所接轨东线方案;CK21+300~CK30+350段线路中线取直方案跨采用小跨度桥梁通过峡谷,对生态红线影响小,推荐CK21+300~CK30+350段线路采用中线取直方案;相较于格栏坪北侧设站方案,格栏坪南侧设站方案站坪条件好,施工风险低,投资节省,故推荐店垭站设在格栏坪南侧。研究成果对山区铁路选线设计具有一定的借鉴意义。

Yuan’an-Baokang branch railway is located in the southeast edge of Jingshan mountain in Western Hubei, where the terrain is undulating, faults and karst are developed, and there are many ecological red lines. Based on the idea of “big first then small, whole first then local”, combined with the relevant concepts of railway route selection in complex mountainous areas, fully considering the mining area distribution,engineering geology, environmental sensitive areas, construction conditions and project investment, this paper studies the rail joint scheme of Yuan’an-Baokang branch line, route scheme of CK21+300~CK30+350section and the location of Dianya station. The results show that: the east route scheme which connect with Xujiachong route office is straight, with good engineering conditions, low construction difficulties and risks. More important, the route has little impact on the mining area and Huangbaihe River Protected area, so the east route scheme is recommended for Yuanbao branch line;The middle route straightening scheme of CK21+300~CK30+350 section not only adopts the small span bridge to cross the canyon, but also has little impact on the ecological red line. The middle line straightening scheme is recommended for CK21+300~CK30+350 section;Compared with the scheme which station is laied on north side of Gelanping,the scheme with station laid on south side of Gelanping has better conditions, lower construction risk and less investment, so Dianya station is recommended to be located on south side of Gelanping. The research can provide a good reference for the selection of railway route in mountainous areas.