摘要
采用Midas/GTS有限元软件,分析了山区陡坡段拓宽公路路基与挡土墙受力变形特性。结果表明,拓宽路基顶面沉降曲线呈"勺子"形,要重视新、老路基结合部位的处治以及挡墙与拓宽路基的拼接处理;不仅要控制拓宽路基工后沉降,还应控制新、老路基的差异沉降,防止其对路面结构造成破坏;挡土墙墙背上的土压力分布并非是理论上的线性分布,土压力大小介于静止土压力与主动土压力之间,挡墙土压力的分布及大小决定了挡墙的稳定状态;通过分析路基拓宽宽度和填料压缩模量等因素对路基和挡墙受力变形的影响,建议根据现场情况减小拓宽宽度,合理选择填筑材料。
Based on the finite element software Midas/GTS,the stress and deformation characteristics of subgrade and retaining wall in the steep slope of mountainous area are analyzed. The results show that the settlement curve of the top surface of the subgrade is in the shape of a spoon,pay attention to the new and old base combination treatment and splicing treatment of retaining wall and widening subgrade,in addition to controlling the settlement of the subgrade,the differential settlement of the new and old roadbed should be controlled to prevent the damage of the pavement structure. The distribution of earth pressure on the retaining wall is not a theoretical linear distribution,the earth pressure on the wall back of retaining wall is between the static earth pressure and the active earth pressure,the distribution and size of earth pressure on retaining wall determine the stability of retaining wall. Based on the analysis of the stress and deformation of the subgrade and retaining wall under the influence of subgrade widening width and compression modulus of the filler,it is suggested that the width should be reduced according to the situation,and the filling material should be selected reasonably.
作者
芦佳
郝宇萌
蒙超荣
LU Jia HAO Yu-meng MENG Chao-rong(School of Highway, Chang＇an University, Xi＇an 710064, China)
出处
《河南城建学院学报》
CAS
2017年第3期19-23,共5页
Journal of Henan University of Urban Construction
关键词
山区陡坡段
有限元
拓宽路基
挡土墙
受力与变形特性
steep slope section of mountainous area
finite element
widening subgrade
retaining wall
stress and deformation characteristics
