摘要
山区公路改扩建项目路基拓宽难度大,解决新旧路基之间出现的不均匀沉降问题是路基拓宽技术的关键。从变形和应变对公路改扩建新老路基结合处的破坏机理展开分析,结合某山区公路工程实例,利用有限元计算软件PLAXIS8.0对不同拓宽宽度、不同填土高度、不同刚度模量下的新旧路基不均匀变形规律进行研究,提出降低山区公路改扩建项目新旧路基差异沉降的技术分类和具体措施。
It is difficult to widen the sub-grade of highway reconstruction and extension projects in mountainous areas.The uneven settlement of new and old sub-grade is the root cause of the disease of highway reconstruction and extension projects.In view of this,this paper first analyzes the failure mechanism of the joint of the new and old sub-grade from the deformation and stress-strain of the joint surface,and then studies the uneven deformation rule of the new and old sub-grade under different widening forms,different filling heights and different stiffness modules by using the finite element calculation software plaxis8.0 in combination with a mountain highway engineering example,and finally puts forward to reduce the mountain treatment measures for differential settlement of old and new sub-grade in the reconstruction and expansion project of regional highway.
作者
苏辰
SU Chen(Xinjiang Li-gong Traffic Survey and Design Institute Co.,Ltd.,Urumqi 831400,China)
出处
《北方交通》
2020年第3期60-63,共4页
Northern Communications
关键词
山区公路
改扩建工程
路基拓宽
数值模拟
Mountain road
Reconstruction and expansion project
Roadbed widening
Numerical simulation
