滇池地区铁路软土地基加固处理技术  

The Reinforcement Technology of Railway's Soft Soil Foundation in Dian Lake Area

作　　者：薛元[1] 崔维秀[1] 封志军[1] 陈建武[1] 

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《铁道工程学报》2015年第8期35-40,共6页Journal of Railway Engineering Society

摘　　要：研究目的:滇池地区软土发育范围广、深度大、成分复杂,尤其淤泥质土和泥炭质土含水量高、孔隙比大、腐殖质含量高,成为地基处理的控制性因素。近年来环滇池区域修建了大量的铁路工程,软土地基加固处理的经济性、合理性是本次研究的主要目的。研究结论:(1)滇池地区以松软土、软黏土为主的软土地基,采用水泥土搅拌桩处理是可行的;(2)淤泥质土为主的地基应加强工艺控制,桩长较长、工程质量要求较高地段可采用多向搅拌水泥砂浆桩;(3)泥炭质土、泥炭土为主的极软土地基必须开展试桩试验,尤其在含水量高、腐殖质含量较高地段,根据试验情况可加强设计采用CFG桩、预应力管桩处理,是较为稳妥的加固措施;(4)采取管桩加固时要分析工点的侧向稳定性,以免刚性桩结构受侧压力而倾斜;(5)在深厚软土地段、沉降要求极高地段或施工场地受限的既有构筑物旁边,必要时采取桩板结构等措施;(6)本研究成果在山区铁路软土地基处理方面有大量应用。Research purposes： The soft soil in the Dian Lake area is a wide range of development, with great depth and complex components, especially mucky soil and peat soil with high water content, high void ratio, high content of humus, so they will be the control factors of foundation treatment. In recent years, a large number of railway projects are constructed in the Dian Lake area, the economy and rationality of the soft foundation reinforcement is the main purpose of this research. Research conclusions： （ 1 ） In Dian Lake area, the soft soil foundation is based on soft clay, and using the cement soil pile is feasible. （2）Silty soil foundation mainly should strengthen the process control, the sections where the pile length is longer and engineering quality requirements is higher can use multi mixing cement mortar pile. （3）In soft soil foundation of peat soil, the pile tests must be carried out, especially in the high water content, high content of humus area according to the experiment the design can be strengthened, and using CFG pile, prestressed concrete pipe pile reinforcement measures treatment is more prudent. （4）To the pipe pile reinforcement, the lateral stability is analyzed, so as to avoid the rigid pile structure under lateral pressure and tilt. （5）In deep soft soil area, the settlement is very high, or the construction site is limited. It is necessary to take the measures of the pile - slab structure. （6） The research results are widely used in soft soil foundation treatment in mountainous areas.

关 键 词：滇池 软土地基 泥炭质土 加固处理 

分 类 号：U213.1[交通运输工程—道路与铁道工程]