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Railway solid high pier for connecting pre-stressed segment with pre-assembled segment

A prefabricated and prestressed technology, applied in the direction of bridge parts, bridges, buildings, etc., can solve the problems of long longitudinal prestressed steel bars and inability to guarantee the prestressing effect, and achieve the effect of convenient transportation and hoisting

Active Publication Date: 2019-05-28
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a technology for prestressed segmental connection of prefabricated assembled segments, and use this technology in solid high piers of railways to solve the problem that the length of longitudinal prestressed steel bars is too long when the height of railway bridge piers is too high , the problem that the prestressing effect cannot be guaranteed

Method used

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  • Railway solid high pier for connecting pre-stressed segment with pre-assembled segment
  • Railway solid high pier for connecting pre-stressed segment with pre-assembled segment
  • Railway solid high pier for connecting pre-stressed segment with pre-assembled segment

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Embodiment Construction

[0029] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0030] The above-mentioned manufacturing method for connecting prefabricated segmental solid high piers based on the concept of segmental tension prestressing includes the following steps:

[0031] 1) Complete the prefabrication work of the pier body sections, caps and other structures in the prefabrication factory. After the prefabrication work is completed, all prefabricated components are transported to the site.

[0032] 2) Clean the groove and boss of the shear key on the module and the upper surface of the module, and apply epoxy adhesive 5 on the segment contact surface and the mortise and tenon part of the module.

[0033] 3) Place the module as follows Figure 3-4 The second pier segment 3 and the third pier segment 4 are assembled in the assembled manner. then follow figure 1 In the vertical stacking method shown, the first pier segment 2,...

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Abstract

The invention discloses a railway solid high pier for connecting a pre-stressed segment with a pre-assembled segment. A longitudinal pre-stressed reinforcement of the bridge pier is divided into threesegments, wherein the first segment of pre-stressed reinforcement is anchored at a groove in the bottom of a foundation, is tensioned on the upper surface of the segment and then is anchored in the second segment. The second segment of pre-stressed reinforcement is anchored at a groove in the bottom of the second segment, is tensioned on the surface of the second segment and then is anchored in the third segment. The third segment of pre-stressed reinforcement is anchored at a groove in the bottom of the third segment, is tensioned at the top of the third segment and then is anchored in a capbeam. Ultra-high performance concrete (UHPC) is poured into an embedded metal corrugated pipe to connect the segments of the precast pier into a whole. The railway solid high pier disclosed by the invention has the beneficial effects that the length of the pre-stressed reinforcement is controlled within a suitable range, so that a pre-stressing effect is guaranteed, the crack resistance, and thestiffness and the impermeability of the component are improved, therefore, the properties of the material can be fully played, and the pre-stress loss is reduced.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a technology for connecting prefabricated and assembled segments by prestressed segments, and the technology is used in solid high piers of railways. Background technique [0002] With the development of road transportation in my country, the requirements for the construction period of bridges are becoming more and more stringent, especially in projects such as railway bridges and expressway overpasses, bridge construction will affect ground traffic and cause traffic jams and other problems, which will greatly Reduced road traffic capacity. The prefabricated segment assembly technology has many advantages such as good construction safety, high construction efficiency, guaranteed quality, short cycle time, and low environmental pollution, and can reduce on-site construction time and impact on traffic. strong practical significance. [0003] A railway bridge is a struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/02
Inventor 韩强程琪珉陈克坚杜修力
Owner BEIJING UNIV OF TECH
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