Abstract: In order to avoid safety and quality accidents such as subgrade collapse, bridge body cracking and line deformation in jacking construction of frame bridge on soft soil foundation, construction method and control measures of using rail fastening and concealed excavation jacking were introduced with jacking construction of five hole frame bridge of 14 m-17 m-5 m-17 m-14 m-14 m of Jishan line K157 + 171.43 as an example. Then they were analyzed and compared with jacking method of lines reinforced by supporting pile of military variable beam and that of open excavation. The results show that jacking method of hidden excavation and track fastening reinforcement has the advantages of small investment, strong applicability, small impact on railway transportation and controllable safety risk. At the same time, control measures in construction of jacking frame bridge in soft soil foundation with high groundwater level, quality control of construction precipitation and grouting reinforcement are the key to prevent collapse and line deformation during jacking, which has guiding significance for similar construction in the future.

Key words: frame bridge, soft soil foundation, jacking, control measures, construction precipitation, grouting reinforcement