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Plate-type ballastless track concrete track plate, manufacturing method thereof, and stretching device thereof

A slab-type ballastless track and concrete technology, which is applied to the manufacturing method, tensioning device, and ballastless track slab field, can solve the problems of easily forming capillary pores in concrete, exposing prestressed steel bars of track slabs, affecting the service life of track slabs, etc. The effect of increasing thickness, increasing service life and improving service life

Active Publication Date: 2012-08-08
CHINA RAILWAY 23RD CONSTR BUREAU LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, the main disadvantage of the track slab constructed by the pretensioning method is that the prestressed steel bar at the end of the track slab is exposed, and the concrete around it is easy to form capillary pores and loosen.
[0021] Since the anchor hole needs to meet the needs of the installation of the jack, the size of the anchor hole is usually large, resulting in a small thickness of the remaining concrete around the anchor hole. Concrete is easy to crack, causing cracks and damage to the track slab, which seriously affects the service life of the track slab

Method used

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  • Plate-type ballastless track concrete track plate, manufacturing method thereof, and stretching device thereof
  • Plate-type ballastless track concrete track plate, manufacturing method thereof, and stretching device thereof
  • Plate-type ballastless track concrete track plate, manufacturing method thereof, and stretching device thereof

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Experimental program
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Effect test

Embodiment 1

[0097] Such as figure 1 with figure 2 As shown, the concrete track slab of the slab ballastless track in this embodiment includes a slab body 1, in which a number of pre-tensioned longitudinal prestressed steel bars 2 are arranged. , And parallel to the longitudinal centerline 1-1 of the slab body, the prestressed steel bar is different from ordinary prestressed steel bars. The longitudinal prestressed steel bar is first tensioned. The prestressed steel bar 2 is prestressed before the concrete is poured in the slab 1, and the longitudinal direction is first stretched. The prestressed steel bar 2 is tightly combined with the concrete in the slab body 1. Since the concrete of the slab body 1 is poured before the longitudinal prestressed steel bar 2 is first tensioned, the shrinkage trend of the longitudinal prestressed steel bar 2 after the first tensioning can be It is more fully and densely combined with concrete to have greater binding power. After the concrete of the slab b...

Embodiment 2

[0099] Such as figure 1 with figure 2 As shown, the concrete track slab of the slab-type ballastless track in this embodiment is provided with a plurality of pre-tensioned longitudinal prestressed steel bars 2 in the slab body 1, and a number of pre-tensioned transverse prestressed steel bars 3 are also provided in the slab body 1.

[0100] The pre-tensioned transverse prestressed steel bar 3 refers to the pre-stressed steel bar that extends along the width direction of the slab body 1 and is parallel to the transverse centerline 1-2 of the slab body. The pre-tensioned transverse prestressed steel bar 3 is also the concrete in the slab body 1. The pre-stressed tension is completed before pouring, and the transverse pre-stressed steel bar 3 is tightly combined with the concrete in the slab body 1 first.

[0101] Similar to the anchoring effect of the first tensioned longitudinal prestressed steel bar 2, since the concrete of the slab body 1 is formed after the first tensioned trans...

Embodiment 3

[0104] Such as Figure 3 to Figure 5 As shown, in the concrete track slab of the slab ballastless track of this embodiment, the pre-tensioned longitudinal pre-stressed steel bars 2 are anchored to the plate body 1 by the anchor plate 4, and the anchor plate 4 is in the shape of a cylinder. In the internally threaded hole 4a, the end of the first tensioned longitudinal prestressed steel bar 2 is provided with an external threaded section 5, and the first tensioned longitudinal prestressed steel bar 2 is threadedly connected with the anchor plate 4, and the anchor plate 4 interferes with the end surface of the plate body 1. The anchor plate 4 is connected to the end face of the plate body 1 in a snap-fit ​​manner under the action of the prestress resilience force of the pretensioned longitudinal prestressed steel bar 2.

[0105] It should be noted that in the other embodiments, the first-tensioned longitudinal prestressed steel bar 2 and the anchor plate 4 can also be fastened by me...

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Abstract

The invention relates to a plate-type ballastless track concrete track plate. The plate-type ballastless track concrete track plate comprises a plate body, a plurality of pretensioned longitudinal prestressed reinforcements are arranged in the plate body, the pretensioned longitudinal prestressed reinforcements extend in the length direction of the plate body, the pretensioned longitudinal prestressed reinforcements are bonded with concrete in the plate body closely, and the pretensioned longitudinal prestressed reinforcements are anchored with the plate body. Compared with existing pretensioned plates, the anchoring strength shortage problem between the plate body and the pretensioned longitudinal prestressed reinforcements occurs when the plate body and the pretensioned longitudinal prestressed reinforcements are connected only by bond stress is solved, because end portions of the pretensioned longitudinal prestressed reinforcements are anchored with the track plate by using an anchoring device in production. By establishing a prestressed system on the end portions of the plate body in an anchoring manner, strength of the concrete located on the end portions of the plate body is enhanced, and service life of the plate body is prolonged.

Description

technical field [0001] The invention relates to a ballastless track slab, a manufacturing method and a tensioning device, in particular to a slab-type ballastless track concrete track slab, a manufacturing method and a tensioning device. Background technique [0002] In the production process of CRTS series slab ballastless track concrete track slabs (hereinafter referred to as "track slabs"), in order to avoid deformation and cracking, it is usually necessary to pre-apply compressive stress to the track slabs by means of tensioning and anchoring to form prestressed reinforced concrete. , to improve the crack resistance and stiffness of the component, and increase its durability. [0003] In the prior art, two construction methods, pre-tensioning and post-tensioning, are mainly used to manufacture prestressed reinforced concrete. [0004] 1. Pretensioning construction [0005] Pretensioning construction refers to the construction method of pouring concrete after tensioning...

Claims

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Application Information

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IPC IPC(8): E01B1/00B28B23/04
CPCB28B23/043E01B1/002
Inventor 钱振地徐明新江成王继军税卓平张玉光周才华陈幼林喻丕金于晓明张天明王红亮翟勇汪永进林晓波刘延龙贾鹏程王梦赵勇
Owner CHINA RAILWAY 23RD CONSTR BUREAU LTD
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