The transition section structure of pile foundation joist type rail-bearing beam in the excavation section of medium and low speed maglev double line

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 joist type bearing rail beam transition section structure for a medium and low-speed maglev double-line excavation section. The pile foundation joist type bearing rail beam transition section structure comprises pile foundation bearing structures, reinforced concrete joists, a reinforced concrete bearing rail beam bottom plate, two rows of reinforced concrete girder structures, backfill at the two sides of a bearing rail beam, a bridge abutment and an end wall, wherein the top ends of the pile foundation bearing structures respectively support the reinforced concrete joists; the top ends of the reinforced concrete bearing rail beam bottom plates support the reinforced concrete girder structures; first drainage ditches are arranged beside the backfill at the two sides of the bearing rail beam; a first drainage slope is arranged at the side, far away from the backfill at the two sides of the bearing rail beam, of each first drainage ditch. The pile foundation joist 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 a structure type of a transition section of a rail-bearing beam in an excavation section of a medium-low speed maglev double-track excavation 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 ...

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

Images