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| Numerical Simulation Study of Influence Factors on the Embankment Slope Stability Filled with Gobi Soil |
| YANG You - hai，SHI Xing - long |
| (Lanzhou Jiaotong University，Lanzhou，Gansu 730070，China) |
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Abstract Abstract ： Research purposes ： The stability of embankment slope of higli speed railway in Gobi area is afected by filling characteristics，rainfall，slope protection，reinforcing and so on. In this paper，based on the subgrade test sections of the second double - line of Lanzhou - Xinjiang Railway in Gobi desert area，for embankment slope filled with typical filling，the rules of influence factors on slope stability are studied with numerical simulation under different conditions. Research conclusions ：( 1) The stability of embankment slope filled with Gobi gravel sand and fine gravel soil can meet the requirements of t!ie specification under unsaturated condition. (2) It is a great influence of t!ie rainfall on the slope stability with Gobi desert soil. The rainfall infiltrates into theslope，which will increase thelateral displacement. Different saturated soil thickness in the shallow slope corresponds to different maximum lateral displacement. If the saturated soil thickness in the shallow slope is less than 1 m，theshallow slopeis prone to collapse. The greater saturated soil thickness in the shallowslope is，the worse the slope stability is. (3) For embankment slope filled with Gobi desert soil, its performance will be well improved through reinforcing the sh91ow slope, and the slope stability will be enhanced, too. Reinforcing has an obvious improvement effect on slope sh91ow slumping. (4) Under the corporate measures of reinforcing and slope protection, the slope stability has been greatly increased, and diseases caused by adverse influence factors can be prevented. (5) The research results can provide the corresponding reference to the engineering construction and design in the similar area.
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Received: 06 March 2017
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2017, Vol. 34 
