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

Abstract

The invention belongs to the technical field of medium- and low-speed maglev traffic engineering low-lying circuits and discloses a medium- and low-speed maglev double-line filled section pile foundation combined bearing rail beam transition segment structure, comprising a plurality of first pile foundation bearing structures, a pile foundation joist combined bearing structure, a reinforced concrete bearing rail beam bottom plate, two rows of reinforced concrete beam structures, bearing rail beam lower roadbed filling, bearing rail beam bilateral backfill, a bridge abutment, a trapezoidal filling mass and an end wall; the top end of the reinforced concrete bearing rail beam bottom plate bears the reinforced concrete beam structures, and the bearing rail beam bilateral backfill is borne through the bearing rail beam lower roadbed filling. The structure has better long-term stability, meets the high requirement on deformation and post-construction settlement of bearing rail beam structures, also meets the requirements on foundation bed long-term stability and durability and construction quality controllability, and enables effective smooth transition between a maglev elevated structure and a low-lying circuit transition segment F rail.

Description

Technical field [0001] The invention belongs to the technical field of low-location lines of medium and low-speed maglev transportation projects, and more specifically, relates to the structural type of the transition section of the rail-bearing beam in the middle and low-speed maglev double-track fill section. Background technique [0002] The low-to-medium-speed maglev rail transit is a new type of transportation. There are few research results at home and abroad, and there are only a few lines in operation all over the world. At present, there are only the mid-to-low-speed maglev railway commercial operation line-Eastern Hill Line that was constructed and opened in Japan in March 2005 and the mid-low-speed maglev railway commercial operation line opened in June 2014 in South Korea. At present, China's low- and medium-speed maglev transportation only has the National University of Defense Technology test line, Qingchengshan test line, and Tangshan test line, but there are no of...

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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