Treatment of collapsible loess foundation

Loess is a special scholar soil accumulated and formed in the arid and semiarid conditions of Quaternary. Its hydraulic properties are collapsibility caused by water invasion, easy to disintegrate when it meets water, easy to be carried away by soil particles under the action of flowing water, forming landform phenomena such as collapse and gully. Such diseases as subsidence, collapse and erosion occur frequently for subgrade in collapsible loess area when it is scoured by water immersion. It is a difficult challenge for subgrade engineering to meet the very strict post construction settlement requirements of high speed railways in the process of high-speed rail construction. This paper combines experimental research and engineering examples. For the difficulties encountered in the treatment of collapsible loess foundation, a systematic and comprehensive analysis is made to deal with the measures. The application is introduced from design plan of construction technology, construction quality control and so on. It can provide reference for similar engineering problems in the future highspeed rail construction.