高速公路拼接段沉降变形特性及地基处理研究  

Study on settlement deformation characteristics and foundation treatment of expressway splicing section

作　　者：马兰[1] Ma Lan(Qinghai Minzu University,Xining 810007,China)

机构地区：[1]青海民族大学,西宁810007

出　　处：《青海交通科技》2024年第3期91-95,共5页Qinghai Transportation Science and Technology

基　　金：青海民族大学2024年研究生精品示范课程(JK-2024-01);青海民族大学2024年大学生创新创业训练计划项目(2024-DCXM-78)。

摘　　要：为了提高高速公路改扩建项目的设计水平,依托某高速公路项目,利用有限元软件ANSYS建立平面计算模型,探讨了填土高度、加宽宽度、土基压缩模量等参数对路基表面各监测点沉降的影响及新旧路基不均匀沉降变化趋势;对水泥搅拌桩和挤密碎石桩两种地基处理方案开展技术性、经济性比选。研究成果表明:高速公路拼接段的路基不均匀沉降随填土高度和加宽宽度的增加而增加,随土基压缩模量的提高而降低,且水泥搅拌桩处理地基的性价比更好。In order to improve the design level of the highway renovation and expansion project,relying on a certain highway project,a plane calculation model was established using finite element software ANSYS to explore the influence of parameters such as fill height,widening width,and soil compression modulus on the settlement of various monitoring points on the surface of the roadbed,as well as the trend of uneven settlement changes between new and old roadbeds;A technical and economic comparison was conducted on two foundation treatment schemes,cement mixing pile and compacted gravel pile.The research results showed that the uneven settlement of the roadbed in the highway splicing section increases with the increase of filling height and widening width,and decreases with the increase of soil compression modulus.Moreover,the cost-effectiveness of cement mixing pile treatment for foundation is better.

关 键 词：高速公路 拼接路基 沉降变形 有限元 地基处理 

分 类 号：U416.1[交通运输工程—道路与铁道工程]