Design method of seamless turnouts on elevated station of longitudinally, transversely and vertically coupled high-speed railway

Abstract

The invention discloses a design method of seamless turnouts on an elevated station of a longitudinally, transversely and vertically coupled high-speed railway, belonging to the fields of railway engineering technology application and design. The design method comprises the following steps: by considering the factors of the structure of a bridge, the arrangement mode of supporting seats and the structure types of rails and considering the actual conditions of displacement coupling among towing points and the influence of the longitudinal displacement of steel rails on the transverse deformation of tongue rails, making a basic assumption; using three-dimensional beam elements to simulate the steel rails; establishing non-uniform beam elements according to the actual cross sections for tongue rails and point rails; modeling according to the actual cross section attributes for steel rails; and using a finite element method to complete corresponding computational analysis according to different working conditions of the seamless turnouts on the bridge. The invention really reflects the mutual coupling action of the bridge, the rails and the turnouts, obtains more accurate results, meets the actual conditions, has high efficiency and strong flexibility, is suitable for design and computational check of various seamless turnouts or turnout groups on the bridge, and provides a reliable tool for the design of the seamless turnouts on the bridge.

Description

technical field

[0001] The invention belongs to the field of railway engineering technology application and design, and in particular relates to a design method for seamless turnouts on elevated stations of high-speed railways with longitudinal, horizontal and vertical coupling. Background technique

[0002] The existing calculation method for seamless turnouts on bridges only considers the surface of the bridge and ignores the deflection deformation of the bridge itself. space deformation. At present, many turnouts of new high-speed railways and passenger dedicated lines in my country will be laid on viaducts to form a seamless turnout structure on the bridge. The seamless turnout on the bridge must meet the smooth and safe operation of high-speed trains and the normal and safe use of the seamless turnout structure itself. The deformation of the seamless turnout on the bridge must meet the relevant requirements, but the traditional calculation method cannot consider the det...

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