Calculation and Analysis of Construction Control of Hutiaomen Bridge

The Hutiaomen Bridge on Guangzhou-Zhuhai Railway is a continuous rigid-frame and flexible arch bridge with span arrangement for the main bridge being(120+248+120) m.The three-dimensional finite element models for the bridge were established by the MIDAS software,the geometric shape and internal force of the bridge structure in the construction process were calculated and the calculations were compared with the design.The calculation of the arch ribs of the bridge was checked in accordance with the Category I Stability and the existing parameters were identified and analyzed as well.The results show that the geometric shape and internal force of the structure in the construction process can all meet the requirements in the relevant codes,the safety factors of the in-plane and out-of-plane stability of the arch ribs are respectively 4.99 and 4.98 and can satisfy the service requirements.The unit weight of concrete,the initial tensioning force of steel strands and the temporary construction load are the parameters of the structure that are highly sensitive,which should be particularly monitored,identified and adjusted in the construction control.