Transition section structure of pile foundation composite rail bearing beam in medium and low speed maglev single line filling section

Abstract

The invention belongs to the technical field of low-embedded lines of medium-low speed magnetic levitation traffic engineering and discloses a composite bearing trail beam transition section structure of pile foundation at a fill section of a medium-low speed magnetic levitation singlet line. The structure comprises first pile foundation bearing structures, pile foundation joist composite bearing structures, reinforced concrete bearing trail beam baseboards, reinforced concrete beam structures, under-bearing trail beam roadbed filler, bearing trail beam either side backfill filler, a bridge abutment, trapezoidal filling bodies and side walls. Multiple first 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 structure is better in long term stability, the high requirements for distortion and post-construction settlement of bearing trail beam structures are met, the requirements for long term stability and durability of foundation beds as well as controllability of construction quality are met, and the smooth transition between magnetic levitation elevated structures and F tracks at the transition sections of low-embedded lines is effectively realized.

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 transition section of a rail-bearing beam in a filling section of a medium-low speed maglev single line. 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 operat...

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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