摘要
自动化监测是邻近高铁工程施工期间保障高铁运营安全的重要手段,但轨旁监测设备会对高铁运营安全造成一定影响。针对高速铁路气动效应对轨旁监测设备安全影响问题,采用《高速铁路设计规范》中气动力计算方法和《混凝土结构后锚固技术规程》中锚固连接内力计算、承载能力极限状态计算的方法,计算分析在路基段列车以350 km/h速度运行情况下,气动效应对距离线路中心线3.5 m的全站仪、保护箱及监测棱镜的影响。计算结果表明,在高铁气动效应影响下,全站仪、保护箱及监测棱镜的锚固螺栓承受的拉力、剪力均小于螺栓钢材破坏受拉、受剪承载力设计值,其锚固基础混凝土所承受的拉力均小于混凝土破坏受拉承载力设计值,满足规范要求。
Automatic monitoring is an important means to ensure the safety of high-speed railway operation during the construction period of adjacent high-speed railway projects.However,the installation of monitoring equipment on the trackside may have a certain impact on the safety of high-speed railway operation.This paper used the aerodynamic calculation method in the Code for Design of High-speed Railway and the calculation method of internal force of anchorage connection and the limit state of bearing capacity in the Technical Specification for Post-Installed Fastenings in Concrete Structures to calculate and analyze the impact of aerodynamic effect on the total station,protection box and monitoring prisms 3.5 m away from the line centerline on the roadbed under the condition of 350 km/h train speed.The calculation results show that under the influence of high-speed railway aerodynamic effect,the expansion bolts of the total station,protection box and monitoring prisms bear less tensile and shear forces than the design values of the bolt steel failure tensile and shear bearing capacity.The tensile forces borne by the anchor foundation concrete are all less than the design values of the concrete cone failure tensile bearing capacity,meeting the requirements of the specifications.
作者
魏好
WEI Hao(China Railway Design Corporation,Tianjin 300251,China)
出处
《铁道勘察》
2024年第5期131-136,共6页
Railway Investigation and Surveying
基金
中国铁路设计集团有限公司科技开发计划重点课题(2023A0253812)。
关键词
高速铁路
气动效应
轨旁监测设备
安全分析
high-speed railway
aerodynamic effect
trackside monitoring equipment
safety analysis
