摘要
青藏铁路铺设无缝道岔难度大,高原铁路昼夜温差大导致道岔温度内力变化大。针对青藏铁路格拉段玉珠峰车站西岔区1JHJ道岔设备状况,建立非线性P60-12号单开道岔有限元计算模型,依据施工锁定轨温,结合当地最高、最低轨温,计算分析长钢轨在温度变化下的位移发展规律,经对比现场实测位移观测数据,模型计算结果正确,横向位移满足要求,模型计算结果满足工程精度要求。年最高轨温季节,在半焊联无缝道岔不同部位钢轨轨腰处布设应变传感器,采集轨温循环变化下的钢轨应变增量,根据岔区与正线长钢轨应变增量变化规律、位移观测数据以及模型计算结果,综合分析得出在玉珠峰车站铺设半焊联无缝道岔方案可行,岔区长钢轨在温度应力作用下稳定。
It is difficult to lay seamless turnouts on the Qinghai-Tibet Railway,and the large temperature difference between day and night on the plateau railway leads to large changes in the temperature of the turnouts.Aiming at the equipment Status of No.1 turnout in the Yuzhufeng station of the Qinghai-Tibet Railway,a non-linear finite element calculation model of P60-12 single-open turnout is established.The long rail is calculated and based on the construction lock rail temperature and the local maximum and minimum rail temperature,the development law of displacement under temperature changes is analyzed.After comparing the field measured displacement observation data,the model calculation result is correct,the lateral displacement meets the requirements,and the model calculation results meet the engineering accuracy requirements.In the season of the highest rail temperature in the year,strain sensors are installed at the rail waist at different parts of the semi-welded seamless turnout to collect the rail strain increment under the cyclic change of rail temperature.According to the change law and displacement of the turnout area and the long rail of the main line based on the observation data and the calculation results of the model,the comprehensive analysis shows that the plan of laying semi-welded jointless turnouts at Yuzhufeng Station is feasible,and the long rails in the turnout area are stable under the action of temperature stress.
作者
芦金新
牟航
甘海云
李媛
梁涛
LU Jinxin;MU Hang;GAN Haiyun;LI Yuan;LIANG Tao(Golmud Works Section,China Railway Qinghai-Tibet Group Co.Ltd,Geermu 816099,China;School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)
出处
《黑龙江工程学院学报》
CAS
2021年第2期12-16,共5页
Journal of Heilongjiang Institute of Technology
基金
国家自然科学基金项目(51568037)
青藏集团公司科技研究开发计划项目(QZ2019-G05)。
关键词
半焊联无缝道岔
非线性有限元
钢轨位移
应变分析
semi-welded seamless turnout
nonlinear finite element
rail displacement
strain analysis
