Pile Foundation Joist Fractional Rail Beam Transition Section Structure in Medium and Low Speed ​​Maglev Double Line Excavation Section

Abstract

The invention belongs to the technical field of medium-low speed maglev traffic engineering low arrangement lines and discloses a medium-low speed maglev double-line excavation section pile foundation support beam separate width type rail bearing beam transition segment structure. The medium-low speed maglev double-line excavation section pile foundation support beam separate width type rail bearing beam transition segment structure comprises pile foundation bearing structures, reinforced concrete support beams, two rows of reinforced concrete rail bearing beam base plates, two rows of reinforced concrete beam type structures, rail bearing beam two-side backfill filler, a bridge abutment and an end wall. The top ends of the pile foundation bearing structures are connected with the reinforced concrete support beams in a bearing mode. The top ends of the reinforced concrete rail bearing beam base plates are connected with the reinforced concrete beam type structures in a bearing mode. A first drainage ditch is arranged beside the rail bearing beam two-side backfill filler. The side, far away from the rail bearing beam two-side backfill filler, of the drainage ditch is provided with a drainage slope. According to the medium-low speed maglev double-line excavation section pile foundation support beam separate width type rail bearing beam transition segment structure, the long-term stability is better. The high requirements for deformation of the rail bearing beam structure and post-construction settlement are met, the requirements of long-term stability, durability and construction quality controllability of a foundation bed are also met, and the smooth transition of a maglev elevated structure and a low arrangement line transition segment F rail is achieved effectively.

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 ...

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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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