Independent pier column type rail bearing beam structure at double-line excavating section of medium-low speed maglev transportation engineering

Abstract

The invention belongs to the technical field of low lines of medium-low speed maglev transportation engineering, and discloses an independent pier column type rail bearing beam structure at a double-line excavating section of the medium-low speed maglev transportation engineering. The independent pier column type rail bearing beam structure comprises a plurality of pile foundation bearing structures, a reinforced concrete rail bearing beam bottom plate, two rows of reinforced concrete beam-type structures and backfill materials on the two sides of a rail bearing beam; the top part of each pile foundation bearing structure is connected with the reinforced concrete rail bearing beam bottom plate; the top end of the reinforced concrete rail bearing beam bottom plate is connected with the reinforced concrete beam-type structures; drainage ditches are formed beside the backfill materials on the two sides of the rail bearing beam; a drainage slope is formed on the side, far away from the backfill material on each of the two sides of the rail bearing beam, of the corresponding drainage ditch. According to the independent pier column type rail bearing beam structure at the double-line excavating section of the medium-low speed maglev transportation engineering, high requirements of a rail structure of the medium-low speed maglev transportation engineering on deformation and post-construction settlement of a rail bearing beam structure can be met; the requirements for long-term stability, durability and construction quality controllability of a foundation bed can also be met; moreover, the economic property is higher.

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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