Pile foundation trimmer type bearing rail beam structure for double-line excavation section of medium-low speed maglev traffic engineering

Abstract

The invention belongs to the technical file of lower lines of medium-low speed maglev traffic engineering, and discloses a pile foundation trimmer type bearing rail beam structure for a double-line excavation section of the medium-low speed maglev traffic engineering. The pile foundation trimmer type bearing rail beam structure comprises pile foundation bearing structures, a reinforced concrete trimmer, a reinforced concrete bearing rail beam bottom plate, two rows of reinforced concrete beam structures and backfill filler, and the backfill filler is arranged on the two sides of a bearing rail beam. The pile foundation bearing structures are vertically arranged, the top of each pile foundation bearing structure is connected with the reinforced concrete trimmer in a bearing mode, the top of the reinforced concrete bearing rail beam bottom plate is connected with the reinforced concrete beam structures in a bearing mode, drainage ditches are arranged besides the backfill filler on the two sides of the bearing rail beam, and a drainage slope is arranged on the side, away from the corresponding backfill filler on the two sides of the bearing rail beam, of each drainage ditch. By means of the structure, the high requirements of a medium-low speed maglev traffic engineering rail structure for structural deformation and post-construction settlement of the bearing rail beam can be met, the requirements of a foundation bed for long-term stability, durability and construction quality controllability can also be met, and the economical efficiency is better.

Description

technical field [0001] The invention belongs to the technical field of low-set lines of medium and low-speed maglev traffic engineering, and more specifically relates to a structure type of a rail-supporting beam in a double-track excavation section of a medium-low speed maglev traffic engineering. Background technique [0002] Medium and low-speed maglev rail transit is a new type of transportation. There are few research results at home and abroad, and there are even fewer lines in operation around the world. At present, there are only the commercial operation line of the medium and low speed maglev railway in Japan in March 2005-Eastern Hills Line and the commercial operation line of the medium and low speed maglev railway in South Korea in June 2014. At present, China's medium and low-speed maglev transportation only has the National University of Defense Technology test line, the Qingchengshan test line, and the Tangshan test line, but there are no official lines in ope...

AI Technical Summary

Problems solved by technology

[0005] (1) The existing low-lying line rail bearing beam structure is set on the subgrade geotechnical structure, which is compacted by filler filling, the compaction quality is not easy to control, and it is prone to deformation in the later stage, and post-construction settlement hard to control

[0006] (2) The rail-bearing beam structure of the low-lying line has high requirements for post-construction settlement of the subgrade and foundation, and the geological conditions in the area where the line passes are generally complex and changeable, and it is difficult to control the construction quality of the conventional rail-bearing beam structure

[0007] (3) The geotechnical structure of the low-lying line due to the filling and compaction of the filler is vulnerable, and the construction quality is not easy to control, and it is relatively easy to produce uneven settlement, which causes the longitudinal and lateral stability of the subgrade under the rail beam to deteriorate , so that the overall stability of the rail beam structure is impaired

[0008] The rail-bearing beam of the low-mounted magnetic levitation line has higher requirements for post-construction settlement, long-term stability and durability of the subgrade bed. When the line is located in the ground reinforcement area, the construction period is long and the construction quality is difficult to control if the traditional rail-bearing beam structure is adopted. , Poor overall structural stability and poor economy

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