软土地区道路加宽工程路基差异沉降特性研究

由于软土特殊的工程特性,在软土地基上展开城市道路改扩建项目难度比一般地区更大,解决新旧路基之间出现的差异性沉降问题是关键。首先分析了软土地区城市道路拓宽可能出现的病害形式及机理,随后以某市政道路为工程依托,利用有限元计算软件ANSYS15.0对新旧路基在不同拓宽宽度、不同路基高度、不同地基土模量下的差异沉降规律进行研究,最后提出降低软土地区城市道路改扩建项目新旧路基不均匀沉降的技术措施及其影响效果,以期为类似的道路改扩建项目建设提供一定的理论指导。

Study on Differential Settlement Characteristics of Roadbed for Road Widening Project in Soft Soil Area

Due to the special engineering characteristics of soft soil,it is more difficult to carry out urban road reconstruction and expansion projects on soft soil foundation than in general areas.It is the key to solve the problem of differential settlement between the old and new subgrade.The possible disease forms and mechanism of urban road widening in soft soil area are firstly analyzed.Then,based on a municipal road project,the finite element software ANSYS15.0 is used to study the differential settlement rules of the new and old roadbeds under the conditions of different widening widths,different roadbed heights and different subgrade soil modulus.And finally,the technical measures to reduce the differential settlement between the old and new roadbeds in the urban road reconstruction and expansion project in the soft soil area are proposed,and its impact effect is introduced in order to provide some theoretical guidance for the construction of the similar road reconstruction and expansion projects.