Independent pier-column rail-bearing beam structure in double-line filling section of medium and low-speed maglev traffic engineering

Abstract

The invention belongs to the technical field of low-embedded lines of medium-low speed magnetic levitation traffic engineering and discloses an independent pier stud type bearing rail beam structure at fill sections of double lines in medium-low speed magnetic levitation traffic engineering. The structure comprises pile foundation bearing structures, reinforced concrete bearing trail beam baseboards, two rows of reinforced concrete beam structures, under-bearing trail beam roadbed filler and bearing trail beam either side backfill filler. Multiple pile foundation bearing structures are arranged; the reinforced concrete beam structures are borne on the tops of the reinforced concrete bearing trail beam baseboards; and the bearing trail beam either side backfill filler is borne by the under-bearing trail beam roadbed filler. The defects of traditional bearing rail beam structures of low-embedded lines can be overcome, the long-term stability is better, the high requirements for distortion and post-construction settlement of bearing trail beam structures of track structures in medium-low speed magnetic levitation traffic engineering are met, the requirements for long term stability and durability of foundation beds as well as controllability of construction quality are 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-line filling 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 operati...

AI Technical Summary

Problems solved by technology

[0005] (1) The existing low-lying track-bearing beam structure is set on the embankment geotechnical structure, which is compacted by filling, the compaction quality is not easy to control, and it is easy to deform in the later stage, and the settlement after construction is difficult. control

[0006] (2) The rail bearing beam structure of the low-lying line has high requirements on the post-construction settlement of the subgrade and foundation, and the geological conditions in the area where the line passes are generally complex and changeable, so the foundation needs to be reinforced at the same time, and the subgrade filling After grading, the area of ​​foundation reinforcement increases, resulting in high cost and long construction period; and the foundation treatment is a concealed project, which is reinforced by conventional soft soil foundation reinforcement measures, and the construction quality is not easy to control

[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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