Abstract：Abstract ： Research purposes ： Te control of foundation settlement is extremely strict for high - speed railway, Lanzhou - Urumchi High - speed Railway crosses a wide range of Xinjiang and Gansu Gobi region，however the coarse - grained soils in Gobi region have collapsibility， so it will have large settlement when meeting water. Currently， the study of coarse - grained soils foundation mainly focuses on bearing capacity and shear strength，etc. There are few studies on collapse characteristics and deformation mechanism of coarse soils in Gobi region, so the study on collapse characteristics and deformation mechanism of coarse soils in Gobi region have very important significance for constructing high speed railway and other similar projects in Gobi region. Research conclusions ： (1) The deformation properties of Gobi coarse soil under flooding conditions can be divided into three stages ： compression deformation， collapse deformation and complex deformation. Collapse deformation stage has the fastest growing and the largest settlement. (2) The coarse grained soil in Gobi region have large collapsibility, and its mineral composition，microstructure and salinity are main internal causes for the collapsibility. (3) The mechanism of collapsing of coarse soil in Gobi region under flooding conditions is that the bond strength between particles decreases， the structures are destroyed under external force， movement of soil particles resulting in the occurrence of a large settlement. (4) This research enriches the collapse deformation theory of coarse soils in Gobi region， and provides reference for constructing high speed railway and other similar projects in Gobi region.
侯彦凯. 戈壁地区粗粒土地基湿陷特性研究[J]. 铁道工程学报, 2016, 33(6): 31-35.
HOU Yan – kai. Research on the Collapse Characteristics of Coarse Grained Soil in Gobi Region. Journal of Railway Engineering Society, 2016, 33(6): 31-35.
2016, Vol. 33 
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