铁路客运专线是高速度、高密度、大运量的现代化交通运输方式,代表着铁路客运的发展方向,是旅客交通运输业一场新的技术革命。客运专线给铁路的设计、施工和监理提出了新的挑战,对线路平顺和路基工后沉降有特殊的要求。文章从水泥搅拌桩的加固机理出发,深入探讨了承载力与沉降设计计算方法,并应用FLAC3D对其进行了建模分析。 Railway Passenger Dedicated Line is a modern transportation mode with high speed, high density and large capacity, which represents the development direction of railway passenger transport and is a new technological revolution in passenger transport industry. Passenger Dedicated Line presents new challenges to the design, construction and supervision of the railway, and has special requirements on the smooth line and post-construction settlement of the roadbed. Based on the reinforcement mechanism of cement mixing piles, the paper deeply discusses the calculation methods of bearing capacity and settlement design, and makes modeling analysis with FLAC3D.