A structure for the transition section between the low-mounted track beam and the viaduct in a medium-low speed maglev traffic engineering

Abstract

A rail support beam low track and viaduct transition section structure for a medium-low-speed magnetic suspension traffic project. The structure comprises a roadbed, a bridge abutment (2), rail support beams (1), grouting pipes (5), and drainage ditches (7). The bridge abutment (2) comprises an abutment back body (2.1) and abutment cones (2.3). Each rail support beam (1) comprises a bottom slab (1.2) and an upper structure (1.1) disposed on the bottom slab (1.2), and the bottom slab is buried in the roadbed, and the bottom slab (1.2) extends downwards to form tenons (1.3) corresponding to tenon grooves (2.2). Each tenon (1.3) is placed in the corresponding tenon groove (2.2), and round corners are disposed on the tenons (1.3) and the tenon grooves (2.2), so that the tenons (1.3) can rotate in the tenon grooves (2.2). There are multiple grouting pipes (5), and the grouting pipes (5) are disposed in the roadbed. The rail support beams of a low track are in lap joint with the tenon grooves of a viaduct, so that settlement and slab staggering between the low track and the viaduct caused by different foundation treatment measures are avoided, the effect that settlement and slab staggering of a magnetic suspension F rail at the junction position of the low track and the abutment are avoided is ensured, and the requirements for smoothness of the F rail at the transition section between a viaduct structure and the low track of the magnetic suspension traffic project is effectively satisfied.

Description

technical field [0001] The invention belongs to the field of low-set line structures of medium and low-speed maglev traffic engineering, and more specifically relates to a transition section structure between low-set track beams and viaducts of medium-low speed maglev traffic engineering. Background technique [0002] Medium and low-speed maglev rail transit is a new type of transportation. At present, 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 o...

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 abutment of the elevated structure will occur, resulting in poor post-construction settlement. The settlement difference between the low-lying line and the position of the abutment will inevitably affect the smoothness of the F track, and may even cause the F track to be misplaced and deformed And other problems, when severe, will affect the normal operation of maglev vehicles

Therefore, the subgrade treatment method of the high-speed railway transition section cannot be directly used in maglev traffic engineering

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