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为保证盾构下穿有碴铁路干线时的运营安全,采用Peck公式计算横向及纵向地表沉降,采用有限元软件计算列车荷载作用时京沪铁路线路变形。分析结果表明:①盾构施工满足京沪铁路速度大于160km/h经常保养的静态管理标准及I级动态管理标准;②盾构施工时可不对穿越区段的有碴铁路干线进行主动加固,但建议进行列车限速并在盾构施工期间及结束后一定时期内采取应急预案。
In order to ensure the operational safety of the shield under the ballast railway, the Peck formula was used to calculate the horizontal and vertical settlement of the ground surface. The deformation of the Beijing-Shanghai Railway line was calculated by finite element software when the train load was applied. The results of the analysis show that: ① The shield construction meets the static management standards and Class I dynamic management standards for regular maintenance of the Beijing-Shanghai Railway at speeds greater than 160km / h; ② The shield railways may not actively reinforce the ballastless railway trunk crossing the section, It is suggested that the speed limit of the train should be taken and contingency plans should be taken during and after the construction of the shield.