Design method for seamless track of unitary ballastless track for long bridge of high-speed railway

Abstract

The invention discloses a high-speed railway long-span bridge unit-type ballastless track seamless line design method. The method includes applying ANSYS software and ABAQUS software to respectively establish a high-speed railway long-span CRTS I-type plate-type or double block type ballastless track seamless line vertical and horizontal vertical space coupling static model and a vertical and horizontal vertical space coupling dynamic model. Composition of structures of steel rails, fasteners, track plates, mortar filling layers, base plates, concave retaining platforms, resin filling layers around the concave retaining platforms, double block type sleepers, roadbed plates, isolating layers, limiting grooves, rubber backing plates, supporting layers, bridges, piers and the like and action of high-speed vehicles are taken into consideration, and stress and deformation of tracks and bridge details can be obtained by calculating contractility, deflection force and braking force under different conditions of vertical resistance of the fasteners, temperature difference of the bridges, ballastless track structural temperature difference, elasticity modulus of the resin filling layers, elasticity modulus of the mortar filling layers, rigidity of the rubber backing plates, friction coefficient of the isolating layers, continuous beam vertical rigidity, continuous beam bridge-span length. The high-speed railway long-span bridge unit-type ballastless track seamless line design method is suitable for design and calculation of high-speed railway long-span bridge unit-type ballastless track seamless lines and can provide services for design and maintenance of high-speed railways.

Description

technical field [0001] The invention relates to the technical field of railway engineering design, in particular to a design method for a seamless line of a unit type ballastless track of a long bridge of a high-speed railway. Background technique [0002] At present, CRTS I-type slab or double-block ballastless track seamless lines are laid on the bridges of many high-speed railway passenger dedicated lines. After the ballastless track is laid, the beam-rail interaction mechanism and calculation model are obviously different from the traditional ballasted track; the beam-rail interaction relationship between different ballastless track structures is also different. Especially after the CRTS I type slab or double-block ballastless track structure is adopted on the long-span continuous beam, the mechanism of beam-rail interaction is more complicated. [0003] In the prior art, some theoretical and experimental studies have been carried out on the design and construction of C...

AI Technical Summary

Problems solved by technology

Especially after the CRTS I type slab or double-block ballastless track structure is adopted on the long-span continuous beam, the beam-rail interaction mechanism is more complicated.

[0003] In the prior art, some theoretical and experimental studies have been carried out on the design and construction of CRTS I-type slab and double-block ballastless track structures. There are relatively few studies on suture lines, and new difficulties are faced in the selection of design and parameters

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