灰土挤密桩在湿陷性黄土路基中的应用

Application of Lime-soil Compaction Pile in Collapsible Loess Subgrade

湿陷性黄土路基的沉降是导致铁路工程建筑物破坏的一个重要原因.灰土挤密桩通过在地基中的挤土效应、灰土之间的物理化学反应,从而提高地基土的承载力和水稳性,桩体和挤密土组成复合地基.通过介绍处理湿陷性黄土的机理和一路基工程具体实例,采用有限元计算方法,探求灰土挤密桩复合地基中应力变形分布特征,得出的一些结论,为实际工程提供参考数据.

The sedimentation of collapsible loess subgrade is a important cause which results to breakage of railway structure. Lime-soil compaction pile improves the carrying capacity and water-stability of foundation soil by the squeezing effect in subgrade and the physical-chemic reaction utilized. The compound foundation is made up of the pile and the compact soil. Through introducing the theory of lime-soil compaction pile in collapsible loess disposal and a actual subgrade project, the characteristics of stress and deformation in lime-soil compaction pile compound foundation are sought by using finite element method, and some of the conclusions which offer the referenced data for practical construction are drawn.