Medium-low speed magnetic levitation simply supported-to-continuous beams and construction method thereof

Abstract

The invention discloses medium-low speed magnetic levitation simply supported-to-continuous beams. The medium-low speed magnetic levitation simply supported-to-continuous beams comprise edge hole beams arranged at the two ends in the route direction end-to-end and a plurality of middle hole beams arranged between the edge hole beams, each edge hole beam comprises an edge hole beam concrete beam (1), and edge hole beam simply supported variable continuous longitudinal prestressed reinforcements (3) are arranged at the upper edges of the ends, adjacent to each other, of the edge hole beam concrete beams (1) and the middle hole beams; and each middle hole beam comprises a middle hole beam concrete beam (6), and middle hole beam simply supported variable continuous longitudinal prestressed reinforcements (8) are arranged at the upper edges of the two ends of the middle hole beam concrete beams (6). The invention further discloses a construction method of the medium-low speed magnetic levitation simply supported-to-continuous beams. According to the simply supported-to-continuous beams, the medium-low speed magnetic levitation transportation conventional standard span bridge structure is changed from simply supported beams to the simply supported-to-continuous beams, the unevenness of the angular rail surface formed by deformation of the beam joints of the adjacent two-hole simply supported beams along with a bridge, and under the action of train loads, the dynamic rail surface is smoother.

Description

technical field [0001] The invention belongs to the technical field of medium and low speed maglev rail transit, and more specifically relates to a medium and low speed maglev beam that is simply supported first and then continuous and a construction method thereof. Background technique [0002] The medium and low-speed maglev rail transit adopts the suspension and guidance technology of the constant electromagnet suction type, and realizes the suspension and guidance of the vehicle through the electromagnetic attraction between the U-shaped electromagnet on the suspension frame of the vehicle and the F-shaped steel rail. [0003] At present, the conventional standard-span bridge structure of medium and low speed maglev generally adopts simply supported beams with a span of 20-40m. The layout of the prefabricated full-hole large box girder is then equipped with a rail support platform. Generally, after the construction of the bridge structure is completed, the track structu...

AI Technical Summary

Problems solved by technology

However, the slotted track generally used in medium and low-speed maglev transportation, that is, the track is not continuous. Once the discontinuous track is deformed at the knuckle angle, it will reduce or limit the passability of the suspension frame. Excessive knuckle deformation may even make the suspension The frame hits the track and gets stuck on the track, such as figure 1 shown

If the conventional standard-span bridge structure adopts simply supported beams, when the simply supported beams bend downward, a knuckle will be formed at the beam joints of two adjacent simply supported beams, and the track on the bridge will also be knuckled due to the deformation of the bridge. Deformation, when the knuckle angle is large, it may affect the passing capacity of the suspension frame of the maglev train, and the suspension frame is prone to large fluctuations at the knuckle position of the rail surface, which affects the ride comfort of the vehicle

In addition, the simply supported beam used in conventional standard span bridge structures in the prior art is not conducive to the passage of the suspension frame and affects the ride comfort of the vehicle. More building materials lead to increased investment, and the appearance is also relatively clumsy, which affects the beauty of the bridge

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