Integral ballast bed track structure for medium and low speed maglev transportation

Abstract

Integral track bed track structure for medium and low speed maglev transportation to accurately realize height adjustment, distance adjustment and longitudinal telescopic adjustment at each fastener node. It includes: support adjustment units arranged at intervals along the extension direction of the track beam, each support adjustment unit includes a left reinforced concrete connector, a right reinforced concrete connector, and a steel truss and a long steel bar connecting them as a whole; the integral track The bed slab is integrated with the track beam through the connecting structure; the angle steel member and the supporting steel plate are detachably installed on the outer side of the left reinforced concrete connector and the right reinforced concrete connector through the high-strength bolts fixed at both ends of the full-length steel bar , the F-shaped rail is fixedly installed on the top plate of the angle steel member through a fastener system; the side plate of the angle steel member is provided with a side plate oblong hole corresponding to the position of the full-length steel bar, and the side plate oblong hole extends vertically. The top plate of the angle steel member The top plate is separated with long round holes, and the top plate long holes extend along the line direction.

Description

technical field [0001] The invention relates to rail transportation, in particular to an integrated ballast bed track structure for medium and low speed maglev transportation. Background technique [0002] Medium and low-speed maglev transportation adopts constant conduction, electromagnetic suspension mode EMS (Electromagnetic Suspension System, electromagnetic attraction suspension), electromagnet lateral restoring force guidance, short stator linear asynchronous motor LIM (Liner Induction Motor, linear induction motor) and train drive mode, train embracing The technology of "T"-shaped guide rail is a new green and low-carbon rail transit solution. The current design maximum operating speed is generally 80-150km / h. At present, medium and low-speed maglev transportation is in the ascendant in the field of urban rail transportation at home and abroad with its own many unique advantages. [0003] Different from the conventional wheel-rail system, the track is the most closel...

AI Technical Summary

Problems solved by technology

This structure has the following deficiencies: (1) multi-layer combination and multiple connections between rails, sleepers, rail bearing platforms and track beams, and poor track structure integrity, which is not conducive to maintaining long-term high precision and High stability, the overall failure rate of the track increases; (2) Sleepers are arranged at continuous intervals on the track beam surface along the line direction, and the track bed is an open structure, which brings difficulties to the daily maintenance of the line and the evacuation of passengers in emergency situations; ( 3) The sleeper adopts a steel structure, and part of the magnetic force lines in the closed magnetic circuit formed between the electromagnet on the suspension frame and the F-shaped steel rail will pass through the steel sleeper, and the magnetic force lines will be dispersed, affecting the suspension characteristics of the vehicle; (4) composed of F-shaped steel rails, The rail row composed of steel sleeper, induction plate, etc. is an integral structure, and the fastener under the sleeper is almost the only provider of track elasticity and adjustment ability. It is fundamentally determined that it is impossible to achieve independent and accurate smoothness adjustment of the F-shaped rail surface at each fastener node. This problem exists in both the track laying stage and the later maintenance stage. High precision requirements

But there are also the following deficiencies: (1) Since the functional area is not integrated with the beam body, it cannot form an overall stressed structure, which is not conducive to ensuring the long-term high smoothness of the track and the long-term effectiveness and integrity of the track components ; (2) The superelevation of the line in the curved section must be realized by the rotation or torsion of the beam body, which requires the use of different templates to manufacture track beams with different curve radii or curve change rates. The requirements and complexity of track beam manufacturing are greatly increased. poor economy

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