Transitional section structure of pile foundation joists with framing type rail bearing beams in the middle and low speed maglev double-line filling section

Abstract

The invention belongs to the technical field of a low-positioned line of middle-low speed magnetic levitation traffic engineering and discloses a framing type bearing-rail beam transition section structure for a pile foundation joist of a middle-low speed magnetic levitation double-line filling section. The framing type bearing-rail beam transition section structure comprises pile foundation bearing structures, two rows of reinforced concrete bearing-rail beam base plates, a reinforced concrete joist, two rows of reinforced concrete girder structures, lower roadbed filling of bearing-rail beams, backfill padding on two sides of bearing-rail beams, a bridge abutment, a trapezoid filling body and an end wall, wherein a plurality of pile foundation bearing structures are arranged; the reinforced concrete girder structures are connected with the top ends of the reinforced concrete bearing-rail beam base plates; the backfill padding on two sides of bearing-rail beams are carried by the lower roadbed filling of bearing-rail beams. The framing type bearing-rail beam transition section structure provided by the invention is higher in long-term stability, can meet the high requirements for the structural distortion and post-construction settlement of the bearing-rail beam structure, can meet the requirements for long-term stability of foundation bed, durability and controllability of construction quality and can effectively realize the smooth transition of the magnetic levitation elevated structure and the low-positioned 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 the structural type of the transition section of the rail-bearing beam of the medium-low speed maglev double-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 op...

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