高速公路拓宽工程软土地基处理方案的设计和施工技术  

Design and Construction Technology of Soft Soil Foundation Treatment Scheme for Expressway Widening Project

作　　者：刘永东 LIU Yong-dong(China Railway 12th Bureau Group First Engineering Co.Ltd.,Xi’an 710038,China)

机构地区：[1]中铁十二局集团第一工程有限公司,西安710038

出　　处：《工程建设与设计》2025年第5期166-168,共3页Construction & Design for Engineering

摘　　要：针对某高速公路改扩建工程中的软土地基处理问题,提出了CFG桩、粉喷桩和碎石桩3种可行的地基处理方案。通过有限元软件PLAXIS建立了数值模型,分析了不同处理方法对路基水平位移和沉降的影响。结果表明,粉喷桩在降低路基水平位移和沉降方面效果最为显著,CFG桩次之,碎石桩效果相对较弱,表明粉喷桩在提高地基承载力和减少沉降方面具有较好的性能。Aiming at the problem of soft soil foundation treatment in an expressway reconstruction and expansion project,this paper puts forward three feasible foundation treatment schemes,including CFG pile,powder jet grouting pile and gravel pile.The numerical model is established by the finite element software PLAXIS,and the influence of different treatment methods on the horizontal displacement and settlement of subgrade is analyzed.The results show that the effect of DJM pile in reducing horizontal displacement and settlement of subgrade is the most significant,followed by CFG pile,and the effect of gravel pile is relatively weak,which shows that DJM pile has good performance in improving foundation bearing capacity and reducing settlement.

关 键 词：高速公路 拓宽工程 软土地基 施工技术 

分 类 号：U418.8[交通运输工程—道路与铁道工程] U419