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| Research on Comprehensive Line Selection of Dali一Lijiang Railway in Soft Soil Region |
| YANG Wenhui1, YANG Ying2, JIANG Liangwen3, HE Jialiang4, LIU Wei5 |
| China Railway Eryuan Engineering Group Co. Ltd, Chengdu, Sichuan, 610031, China. |
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Abstract Research purposes: Dali-Liang Railway must pass through Erhai, Heqing, Lijiang basin, closed depression and gully of low-middle mountains between these basins, in these areas, soft soil is widely distributed, multi-level, big thickness. In Dali, Heqing, Lijiang and its corridor, environment is extremely unique and sensitive, geological conditions are complex, large active faults are developed, earthquakes are frequent，earthquake magnitude is great, earthquake intensity is high. This paper which makes research on comprehensive line selection for soft soil geology and environment complex mountain railway，aims to select route scheme of avoiding the soft soil wide, deep, thick zones and building a resource saving, environment friendly railway project.
Research conclusions :(1)The regional geological structure，new tectonic movement control basin and development and distribution of soft soil. These fault zones of forming basin edge or contour play important role in controlling the development and distribution of soft soil. On the side near the main fault zone of the basin，thickness of soft soil is large, characters of soft soil are bad, and all these factors effect line selection and result of line selection.(2)These route schemes, which comprehensive research recommended, selected the east coast of Erhai, east line of Heqing basin, east of Lijiang basin near mountains and through small depressions short distance, soft soil geological conditions are relatively good, soft soil length greater than 76. 162 km is avoided, the construction resources saving, environmental friendly railway requirements are met. (3)This research provides reference value for engineering site selection and line selection in mountain regions of soft soil development and complex environment.
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Received: 06 July 2013
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2014, Vol. 31 
