Concrete sleepers and their making process

Abstract

This invention discloses one kind of concrete tie and its production method, after this sleeper suits the heavy load and raises the fast railroad standard line to use sleeper, as well as the radius 500m - 1200m curve and the straight line mountainous area track line use, this invention sleeper keeps off the shoulder structure, it keeps off the shoulder concrete to raise, the gauge back plate adds thick, the rubber backing strip adds thick, sleeper in according to vertical staggers the arrangement way arrangement to have the spiral rib steel bar, is keeping off the shoulder nose minute position disposition shearing force muscle. The beneficial effect is: Enhances keeps off the shoulder intensity, the change crosswise action in keeps off on the shoulder the transmission direction, increased the area of thrust surface, the theory and the experiment had proven might enhance keeps off above a shoulder limit bearing capacity time, effectively solved the concrete to keep off the shoulder to be easy to damage the question; Simultaneously solved the gauge apron block along to keep off on the shoulder to crawl, gets down the string question; Enhances under in the axle and the pillow the section dead load strength, prevented produces along the steel bar vertical crack, effectively strengthens sleeper anti- weary ability and later period intensity.

Description

technical field [0001] The invention relates to a concrete sleeper for the standard gauge of railway lines, which is suitable for the standard gauge of railway lines after heavy load and speed increase, and for mountainous railway lines with curves and straight lines with a radius of 500m-1200m. Background technique [0002] According to the applicant's professional knowledge: the sleeper bears various forces from the rails, and elastically transmits the forces to the ballast bed, while effectively maintaining the gauge, direction and position of the track. The main types of sleepers used in my country's railway tracks are wooden sleepers and prestressed steel (string) concrete sleepers. The advantage of concrete sleepers is that the longitudinal and lateral resistance is large, which improves the stability of the line, can meet the requirements of high-speed and large-capacity railways, and can save a lot of high-quality wood. On my country's main railway lines, except tha...

AI Technical Summary

Problems solved by technology

However, Type IIIa (that is, concrete sleepers with shoulders) still has the following defects (see figure 1 , figure 2 ): The main performance is that the gauge baffle seat is easy to loose. Under the condition of lateral force and vibration of the train, the gauge baffle seat often climbs up; the shoulder lateral thrust test also shows that when the lateral force is 60kN , the gauge baffle seat will climb up, so that the elastic fastener is in an abnormal working state and cannot provide effective buckle force

Second, due to the climbing of the gauge baffle seat, and the small radius of the curve of the mountainous railway, the lateral force is large. When the gauge baffle seat climbs up seriously, the contact area with the sleeper shoulder is reduced, and the lateral direction along the slope of the shoulder is reduced. The component force will cause the concrete to bear the shear force, the contact area will decrease, and the shear stress will increase, causing the shear stress to exceed the strength of the concrete and rupture

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