Safely Impact Assessment and Analysis of Intercity Railway Bridges Overpassing Gate Station
The newly built intercity railway from Nantong Suzhou to Huzhou overpassing ongoing Huoshaopan Gate Station adopts a bridge scheme.To ensure safety of gate station during construction and operation of intercity railway bridges,as well as gate station operation and maintenance impacts on the intercity railway bridges,a safety impact assessment of intercity railway bridges overpassing gate station was conducted,with analyzing deformation of gate station and intercity railway bridges.Firstly,empirical analysis method,risk exchange method and expert investigation method were used to investigate qualitative identification of risk source during intercity railway bridges,gate station construction and operation,and determining evaluation criteria based on specifications.It was determined that the horizontal deformation of the control value of the bridge pier was 2 mm,the uniform settlement was 20 mm,and the settlement difference was 10 mm.The horizontal deformation of the control value foundation of the gate station was 5 mm,the uniform settlement was 150 mm,and the settlement difference was 50 mm.Then,the finite element numerical simulation was used to quantitatively analyze impact of excavation of foundation pits for intercity railway bridges,main structures construction,and train operation on the vertical and horizontal deformation of gate station structure,Gate station operation,river sedimentation,and dredging impact on vertical and horizontal deformation of intercity railway bridge structures,intercity railways operating load case combining with changes in river water level impacts on gate station,and other load cases.The calculation results show that the deformation is within the control range.
NETL
NSTL
万方数据
