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

Abstract

The invention belongs to the technical field of medium and low speed maglev traffic engineering low lines and discloses a composite bearing rail beam transition section structure of a medium and low speed maglev single line excavation section pile foundation. The composite bearing rail beam transition section structure of the medium and low speed maglev single line excavation section pile foundation comprises a first pile foundation bearing structure, a pile foundation support beam composite bearing structure, a reinforced concrete bearing rail beam bottom plate, a reinforced concrete beam type structure, backfill filler on two sides of a bearing rail beam, a bridge abutment and an end wall, wherein the top of the first pile foundation bearing structure is connected with the reinforced concrete bearing rail beam bottom plate in a bearing mode; the top end of the reinforced concrete bearing rail beam bottom plate is connected with the reinforced concrete beam type structure in a bearing mode; drainage ditches are arranged beside the backfill filler on the two sides of the bearing rail beam; and drainage slopes are arranged on the sides, far away from the backfill filler on the two sides of the bearing rail beam, of the drainage ditches. The composite bearing rail beam transition section structure of the medium and low speed maglev single line excavation section pile foundation is better in long-term stability, not only meets the high requirements of deformation and post-construction settlement of the bearing rail beam structure, but also meets the controllability requirements for long-term stability, durability and construction quality of a foundation bed, and effectively realizes smooth transition between a maglev elevated structure and a low line transition section F rail.

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 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 op...

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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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