Railroad bridge construction method for keeping preexistence railroad track and rail service

摘要

The present invention can be reliably excavated while minimizing the deformation of the track while minimizing the deformation of the ground while maintaining the existing railway track and railway operation, and after the construction of bridges and piers after excavation, it is possible to install girders and slabs. It provides a method for constructing railway bridges that maintains existing railway tracks and railway operations. A method for constructing a railway bridge under an existing railroad track according to a preferred embodiment of the present invention includes the steps of: (a) inserting a rail support between rails supporting rails in a certain section of the railroad track; (b) arranging the rail support beams on both sides of the railroad track, and then binding both ends of the rail support to the rail support beams; (c) placing two or more support piles in a lengthwise direction of the railroad track 20 at a predetermined distance from the rail support connecting beams to penetrate the ground to a certain depth; (d) fixing the cap beam on the top of the support pile; (e) installing a plurality of support jacks on the upper surface of the cap beam; (f) arranging a plurality of cross beams orthogonally in the lower portion of the railroad line to pass through the upper end of the support jack, and fixing the cross beam to the support jack; (g) manipulating the support jack to allow the cross beam to support the rail support beam; (h) After the steps (c) to (g) are performed at two or more places in a certain section of the railroad track 20 to stably support the railroad track, stepwise to the excavation floor targeting the lower part of the railroad track. Excavating; (i) mounting the bridge girder in the space between the railway track and the shift and pier after completing the shift and pier construction at the planned location on the excavated floor; (j) the step of constructing a floor plate by pouring concrete on top of the bridge girder; characterized in that it is constructed including.