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| Exploration on the Engineering Geological Problems of the New Lhasa— Linzhi Railway |
| ZOU Chen |
| (China Railway Eryuan Engineering Group Co. Ltd，Chengdu，Sichuan 610031，China) |
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Abstract Abstract: Research purposes: The new Lhasa - Linzhi Railway is located in the Qinghai - Til)et Plateau，where geological environment is extremely complex. The developed special soil and rock and unfavorable geological condition are the key to the railway alignment. Through the analysis of engineering geological problems，this paper proposed targeted alignment principle，to further stabilize and optimize the alignment programs. Research conclusions ：( 1 ) The new Lhasa - Linzhi Railway is located in the Yarlung Zangbo River suture zone，with highly developed geological structure. (2)Typical special soil and rock：soft soil，expansive soil and rock，frozen soil and so on. (3 ) Typical unfavorable geological condition ： earthquake，high crustal stress，sand wind，ice damage，high ground temperature and so on. (4) Several suggestion to avoid the problems：it should be along the seismic favorable section；it is better to be along leeward slope valley，windward embankment should be far away from the toe，meanwhile taking some sand engineering；in reservoir bank collapse zone，it should be along the less influenced slope by structure，should be along the stratification inclined reservoir slope at the same time avoiding soft and hard intercalary strata，and better to be along stable slope with thinner cover to prevent old landslide lose stability again or new landslide produced after water storage; in ice damage zone，it is better to be along sunny and steep slope that water flowed unobstructed when crossing a ditch，not excavated in the abundant underground water section ; it should try to avoid the geothermal development zone， or be along geothermal edge，simple structure，weak geothermal zone with a large angle if it have to. (5) The research results can be used in the similar geological engineering survey and design.
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Received: 30 December 2015
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2016, Vol. 33 
