Steel truss type track structure of seamless magnetic levitation track panel, and construction method thereof

Abstract

The invention discloses a steel truss type track structure of a seamless magnetic levitation track panel. The structure is mainly composed of a steel truss type track panel, a fastener system, a trackbearing table and the like from top to bottom, wherein the steel truss type track panel comprises an induction plate, F-shaped steel, a steel truss sleeper plate, a steel truss side web plate, a steel truss middle web plate and a steel rail, the steel rail is longitudinally welded into a full-length steel rail, and the fastener system locks the full-length steel rail in a longitudinal unlimited buckling mode; and F-shaped guide rails of the adjacent sections in the single steel truss type track panel are closely assembled according to a zero track gap. According to the main design thought ofthe steel truss type track structure, medium-low-speed magnetic levitation track panels are designed in a seamless mode and laid in a seamless track mode; the zero track gap is formed between the track panels, so that a continuous and flat F track suspension detection surface is provided for a suspension gap sensor to the greatest extent, and a suspension control system is ensured not to work across the track gap.

Description

technical field [0001] The invention belongs to the field of medium and low-speed maglev transportation, and in particular relates to a steel truss track structure of a seamless maglev rail row and a construction method thereof. Background technique [0002] Medium and low-speed maglev transportation is a kind of principle that maglev trains use a constant electric magnet to attract ferromagnetic materials (F-type guide rails), relying on electromagnetic force to realize the levitation, support and guidance of the maglev train, and drive the train forward through the electromagnetic force generated by the linear asynchronous motor , to realize the transportation mode in which the train surrounds the track without contact. Because it has the advantages of environmental protection, high safety, strong climbing ability, small turning radius, low construction cost, low operation and maintenance cost, etc., it is a very competitive green rail transit travel tool. [0003] After ...

AI Technical Summary

Problems solved by technology

Disadvantages: In order to ensure the laying accuracy of the suspension rail, in addition to the manufacturing accuracy of the suspension rail and the installation accuracy between the suspension rail and the fixed frame must meet the requirements, the track beam also needs to be finished and polished, and the cost is high; the track function parts are installed on On both sides of the track beam, installation and construction are inconvenient; during operation, the geometric smoothness of the track needs to be adjusted by adding spacers between the fixed frame and the suspension rail, or by adjusting the three-dimensional support of the bridge. Due to the lack of an operating platform, the adjustment operation is difficult ;Using the series of rail modules, it is inevitable to install rail expansion joints, which cannot be seamless, and cannot provide a continuous F-rail suspension detection surface

Disadvantages: The connection between the F-shaped steel and the track beam is weak, similar to the cantilever structure, and the force is unreasonable; due to the limitation of the installation space, the types of the pads of the concrete prefabricated components and the connecting steel webs are inconsistent, which increases the design , Difficulty in manufacturing and construction, it is extremely inconvenient for the on-site construction personnel to operate; it is made of rail row modules connected in series, which cannot avoid the installation of rail row expansion joints, cannot be seamless, and cannot provide a continuous F-rail suspension detection surface

Disadvantages: Although the components are reduced and the height of the track structure is reduced, the installation height between the contact rail of the medium and low-speed maglev and the F rail remains unchanged, which will inevitably cause the installation position of the contact rail to move downward. Due to the influence of the limit, it will cause the existing The height of the track beam is not enough, especially in the low-lying line section, increase the amount of concrete

Disadvantages: Angle steel components are used to install F-shaped steel, the cantilever structure is weak, and the force is not reasonable; the three-dimensional adjustable ability of the elastic support adjustment unit is limited, which is not conducive to the adjustment of track geometric smoothness; And the height of the structure will not be too low (the height of the sleeper and the minimum thickness of the concrete under the sleeper), the dead load of the second phase of the track is slightly larger; the overall track bed is clean and flat, but it can be directly used as a channel for daily maintenance of the line and passenger evacuation in emergency situations. weak and unsafe

Disadvantages: The pressure-bearing elastic body system is more complex and has many parts; when the track beam is prefabricated, the installation holes must be accurately reserved for the anchor bolts, which increases the difficulty of prefabrication; the rail row modules are connected in series, and the installation of rail row expansion joints is inevitable , cannot be seamless, and cannot provide a continuous F-track suspension detection surface

Disadvantages: The misalignment index of the rail row is within ±1mm, so the thickness of the U-shaped connecting plate must be less than 1mm. The components are light and thin, and they are affected by temperature changes for a long time. The strength and stability are difficult to maintain

In addition, the same reason still cannot cancel the installation of the rail joint

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