Long surface pedestal production line for two-way pre-tensioned pre-stressed concrete track slab

Abstract

The invention relates to a long surface pedestal production line for a two-way pre-tensioned pre-stressed concrete track slab. The long surface pedestal production line is characterized by comprising one or more production units; each production unit comprises four production areas which are symmetrically arranged; each production area is internally provided with a steel model for producing the track slab; the four sides of each production area are respectively provided with a transverse tensioning end beam and a transverse fixing end beam as well as a longitudinal tensioning end beam and a longitudinal fixing end beam for fixing steel wires; and a transverse tensioning mechanism or longitudinal tensioning mechanism corresponding to the position of the steel model is arranged between the adjacent sides of each production area. According to the long surface pedestal production line for the two-way pre-tensioned pre-stressed concrete track slab disclosed by the invention, in each production unit, not more than six steel models can be arranged transversely through central symmetry, and more than two steel models can be arranged longitudinally; and in operation, the tensioning mechanism in the middle can be respectively used to finish tensioning operation for one time, so that cost can be greatly saved, production efficiency can be improved, and volume production can be easily performed.

Description

technical field [0001] The invention belongs to the technical field of manufacturing high-speed railway ballastless track slabs. More specifically, the invention relates to a production line for the long-face pedestal of bidirectional pretensioned concrete track slabs. Background technique [0002] With the continuous development of science and technology, ballasted track is gradually eliminated due to its various disadvantages, while ballastless track is gradually used in the construction of high-speed railways due to its high reliability, high smoothness, high durability and almost no track maintenance. Adopted, but the key technology of the ballastless track lies in the track plate and its manufacturing process. [0003] The track slab laid on the roadbed is under the pressure from the two steel rails. As time goes by, the track slab is often cracked or broken due to external force deformation, thus causing unnecessary losses. At the same time, it is also very inconveni...

AI Technical Summary

Problems solved by technology

However, since the production of bidirectional pre-tensioned prestressed concrete track slabs requires tensioning and untensioning operations around the steel model, a large number of tensioning systems are required, which results in a sharp increase in the cost of the production line

Moreover, the long-line pedestal method is one-way stretching along the direction of the pedestal. If jacks are used on both sides of the pedestal to tension the vertical steel bars, the production of existing products can also be realized, but the problem that arises is that each mold needs a set of jacks. With the increase of the number of jacks, the problems of a sharp increase in cost, complicated operation and low efficiency have been brought

In addition, as far as the developed countries of high-speed railways in the world are concerned, the current high-speed railways in the world mainly use Japanese I-type track slabs and German II-type track slabs. Among them, Japan’s I-type track slabs adopt the single-piece mold post-tensioning production process. Type II slabs in Germany are produced by the unidirectional pretensioning process. Since the internal structure of the bidirectional pretensioned prestressed concrete track slab is completely different from the above two kinds of track slabs, the above two production processes cannot be simply applied to prestressed bidirectional pretensioned concrete. In the production of track slabs, it can only be used as a reference

Moreover, so far, no precedents have been found for the mass production of two-way pretensioned concrete precast elements

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