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

Abstract

The invention belongs to the technical field of middle and low speed, magnetic levitation traffic engineering for lowly-laid rail route, and discloses the transition structure for middle and low speed, magnetic levitation, single-line fill section pile foundation, joist-type rail-bearing beam. The structure includes a foundation load-bearing structure, a reinforced concrete joist, a base floor for reinforced concrete rail-bearing beam, a reinforced concrete beam structure, a rail-bearing beam below-roadbed fillings and a rail-bearing beam two-side backfill fillings, a bridge abutment, a trapezoid filling body and an end wall. The aforementioned foundation load-bearing structure is provided with multiple pieces; the top part of the reinforced concrete rail-bearing beam base floor connects with the reinforced beam structure; the aforementioned trail-bearing beam two-side backfill fillings connect through the rail-bearing beam below-roadbed fillings. The present invention has better long-term stability; it satisfies the high requirements of structure deformation and post-construction settlement of rail-bearing beam, it also satisfies the requirements of long-term stability, durability and controllability of construction quality for the foundation bed, effectively achieving the smooth transition of magnetic levitation elevated structure and lowly-laid rail route transition section F track.

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 medium-low speed maglev single 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 operation, and they are mainly ele...

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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