Construction method for continuous type construction auxiliary girder in jacking of railway box culvert and device for implementing construction method

Abstract

The invention discloses a construction method and device for jacking continuous construction beams for railway box culverts. Excavating and pouring continuous construction beams excavate hole pile foundations, excavating prefabricated pits; prefabricating box culverts; elevating existing railways and Reinforcement, that is, to erect crossbeams first, and then erect multi-section longitudinal beams connected together on both sides of the railway to form a longitudinal beam system. The longitudinal beam system is supported on On the ground, the longitudinal beam lifts and fixes the beam and the railway rail, and the longitudinal beam is bolted with high-strength bolt groups; the prefabricated box culvert is jacked, and the box culvert section is placed on the top of the box culvert section every time it is jacked. Set up temporary piers on the side with temporary excavated pile piers, and remove the temporary excavated pile piers on the side of the box culvert section, and carry out the jacking of the next box culvert section until all box culvert sections Jacking up to the designed position; backfill the top of the separated box culvert and goafs at both ends, remove the convenience beams and temporary buttresses, and restore the line.

Description

technical field [0001] The invention relates to a construction method of a construction beam, in particular to a construction method of a railway box culvert jacking continuous type construction beam. The invention also relates to a device for realizing the construction method of the continuous construction convenience beam. Background technique [0002] With the increasing number of cars, urban traffic is facing increasing pressure. Existing railway lines often become the bottleneck of urban traffic development. On the one hand, the original railway bridges and culverts are narrow and cannot meet the current traffic travel requirements. On the one hand, the position and quantity of the original bridges and culverts can no longer match the later urban arterial roads. Urban road planning for sidewalks is more common, and frame bridges formed by four-hole box culverts are more common when the railway subgrade section intersects with the railway. [0003] The construction met...

AI Technical Summary

Problems solved by technology

But there are also the following problems: the span combination is less selective and inflexible, and there are only the above four stereotyped spans; see figure 1 , during the jacking construction process of porous box culverts one by one, after the first overhead is completed, the first hole box culvert needs to be jacked, and then both sides and the top need to be backfilled, and the D-shaped beam overhead system is removed, restored and maintained The railway line reaches the standard, and then the position of the longitudinal beam is changed to be elevated again, and then the next hole box culvert jacking construction can be carried out. During the construction, the position of the beam needs to be changed many times, and the line needs to be restored many times. The same position needs to be repeated. Excavation and backfill operations require complicated procedures and long operation cycles, requiring more blockade points and longer slow-moving time, which have a greater impact on railway operations

In the construction process of the porous frame bridge, the ordinary D-shaped construction beam construction method can no longer meet the construction requirements very well

Images