摘要
针对某高速铁路无砟轨道线路遭受地震灾害造成的损毁修复,从全面分析轨道形变特征入手,探究以顺应变形趋势为原则重构灾后线路几何形态,为线路总体修复方案奠定基础,同时研究高速铁路长大直线段拟合的约束条件,以及适合高平顺性轨道线路拟合重构的技术路线与方法。通过对兰新高铁大梁隧道段线路震后形变状态分析,提出基于形变分析的线路重构拟合方案,即论述错断处“S”形曲线衔接段线元参数的优先符合原则和对长大直线拟合引入小折角与边长双重约束的思路,可为类似线路的修复提供有益借鉴;同时,引申出补充当前无砟轨道线路关于长大直线定义方面技术空白的必要性;采取虚拟化转换的平面线形可视化拟合重构技术路线,将通常难以直视的微观变形可视化,可借助其观察了解线路形变细节,通过人工精准判断及主动干预,提高进行平面线形拟合重构的效率与质量。
Aiming at the repair of the damaged line caused by the earthquake disaster on the high-speed railway ballastless track line,this paper,starting from a comprehensive analysis of the track deformation characteristics,studies the reconstruction of post-disaster line geometry based on the principle of conforming to the deformation trend and lays the foundation for the overall repair plan of the line.Meanwhile,it studies the constraints on the fitting of the long straight section of high-speed railway and the technical route and method for fitting and reconstruction of high smoothness track line.Fitting line reconstruction scheme is put forward based on the post-earthquake deformation state analysis of Daliang Tunnel of Lanzhou-Xinjiang High-speed Railway segment line.The scheme discusses the element parameters of priority of“S”shaped curve joints segment line at fault breaks,and the concept of double constraints with small folding angle and side length introduced to the long line fitting,which can provide references for the similar line repair.And it is necessary to supplement the technical gap in the definition of long line of ballastless track line at present.The technical route of plane line shape visual fitting and reconstruction with virtual transformation is adopted to visualize the microscopic deformation,which is usually difficult to be seen directly,and observe and learn the details of line deformation.The efficiency and quality of straight line shape fitting and reconstruction can be improved through accurate manual judgment and active intervention.
作者
杨建勋
YANG Jianxun(State Key Laboratory of Rail Transit Engineering Informatization(FSDI),Xi'an 710043,China)
出处
《铁道标准设计》
北大核心
2023年第8期30-36,共7页
Railway Standard Design
基金
中铁第一勘察设计院集团有限公司科技开发计划项目(院科17-64)。
关键词
高速铁路
无砟轨道
线路修复
形变分析
长直线双重约束
拟合重构
可视化
high-speed railway
ballastless track
line repair
deformation analysis
long line double constraint
fitting reconstruction
visualization
