摘要
随着城市交通的快速发展,不可避免地会出现新建市政道路对地下既有轨道结构造成安全影响的情形。如何准确评估其影响程度、是否会存在安全性问题等,对确保既有轨道结构在市政道路施工及运营阶段的安全运营至关重要。以重庆市某上跨既有轨道结构的拟建市政道路工程为背景,采用二维有限元与三维有限元分析相结合的方法,对高架桥影响轨道线路区间的最不利断面进行了轨道结构位移与变形等相关安全影响的计算分析,研究了拟建市政道路高架桥对既有轨道结构的安全影响。研究结果表明,该拟建市政道路对既有轨道结构的安全影响在可接受的范围内。
With the rapid development of urban traffic,it is inevitable that the new municipal road will have a safety impact on the existing underground rail structure.How to accurately assess the impact degree and whether there will be safety problems are very important to ensure the safe operation of existing track structures during the construction and operation stages of municipal roads.Based on the background of a proposed municipal road project in Chongqing which spanned the existing track structure,using the method of two-dimensional finite element analysis with three-dimensional finite element analysis,the calculation and analysis of the displacement and deformation of the track structure as well as other related safety impacts of the most unfavorable section of the viaduct affecting the track line interval were carried out,and the safety impact of the proposed municipal road viaduct on the existing track structure was studied.The conclusion of the study shows that the safety impact of the proposed municipal road on the existing track structure is acceptable.
作者
周智海
陈芳
ZHOU Zhihai;CHEN Fang(China Merchants Chongqing Communication Research&Design Institute Co.,Ltd.,Chongqing 400067,China)
出处
《重庆交通大学学报（自然科学版）》
CAS
CSCD
北大核心
2020年第6期59-65,共7页
Journal of Chongqing Jiaotong University(Natural Science)
基金
国家自然科学基金项目(51608470)。
关键词
隧道工程
安全影响评估
市政高架桥
轨道结构
二维有限元
三维有限元
tunnel engineering
safety impact assessment
municipal viaduct
track structure
two-dimensional finite element
three-dimensional finite element
