某高速公路软土地基碎石桩处理及效果分析

Treatment and Effect Analysis of Gravel Pile in Soft Soil Foundation of an Expressway

锤击成孔振冲碎石桩通过置换桩位土体,挤密增强桩间土体,形成复合地基,能够显著提高软土地基的承载力。锤击成孔振冲碎石桩具有便于取材,工程造价低,施工工艺简便,施工速度快等优点,在工程实践中广泛应用。结合碎石桩的特点和工程实例,详细介绍了工程设计及施工要点,并对施工效果进行评价,总结经验,以期为今后类似工程的设计和施工提供参考。

The bearing capacity of the soft soil foundation can be significantly improved by replacing the soil mass of hammering and pore-forming vibroflotation gravel pile at the pile position,compacting and strengthening the soil mass between the piles to form the composite foundation.The hammering and pore-forming vibroflotation gravel pile has advantages like being convenient for materials selection,low construction cost,simple construction technology and fast construction speed and so on,which is widely used in engineering practice.In combination with the characteristics of gravel pile and engineering projects,the engineering design and construction points are introduced in detail,and the construction effects are evaluated,so as to summarize the experience and provide reference for the design and construction of similar projects in the future.