Pile Foundation Composite Framed Rail Beam Transition Section Structure in Medium and Low Speed ​​Maglev Double Line Fill Section

Abstract

The invention belongs to the technical field of low lines of a medium and low-speed maglev transportation project, and discloses a pile foundation composite framing type bearing rail beam transition section structure for a medium and low-speed maglev double-line fill section. The pile foundation composite framing type bearing rail beam transition section structure comprises first pile foundation bearing structures, a pile foundation joist composite bearing structure, two rows of reinforced concrete bearing rail beam bottom plates, two rows of reinforced concrete girder structures, roadbed filler under a bearing rail beam, backfill at the two sides of the bearing rail beam, a bridge abutment, a trapezoidal filling body and an end wall, wherein the plurality of first pile foundation bearing structures are available; the top ends of the reinforced concrete bearing rail beam bottom plates support the reinforced concrete girder structures; the backfill at the two sides of the bearing rail beam is supported by the roadbed filler under the bearing rail beam. The pile foundation composite framing type bearing rail beam transition section structure is better in long-term stability, not only meets the high requirements on bearing rail beam structure deformation and post-construction settlement, but also meets the requirements on long-term stability, durability and controllability of construction quality of a foundation bed, and effectively realizes smooth transition from a maglev elevated structure to an F rail of a low-line transition section.

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 the structural type of the transition section of the rail-bearing beam of the medium-low speed maglev double-line filling section. 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 op...

AI Technical Summary

Problems solved by technology

In the low-lying line section, the foundation under the rail-bearing beam is a geotechnical structure composed of rock and soil. Affected by factors such as terrain and geological conditions, the quality is relatively difficult to control. It is prone to uneven settlement under the action of load and various natural environmental factors. It is inevitable that post-construction settlement inconsistent with the bridge abutment of the elevated structure will occur, resulting in poor post-construction settlement. The settlement difference between the low-lying line and the bridge abutment position will inevitably affect the smoothness of the F track, and may even cause the F track to be misplaced. , deformation and other problems, in severe cases, will affect the normal operation of maglev vehicles

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