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External prestress reinforcing structure of continuous rigid frame bridge

An external prestressing and reinforcing structure technology, applied in bridge reinforcement, bridge, bridge maintenance and other directions, can solve the problems of inability to exert high strength of external cables, affecting the service life of external cables, and being susceptible to corrosion, etc., to achieve flexible layout and avoid corrosion. , the effect of prolonging the service life

Active Publication Date: 2019-10-01
CHINA CONSTR FOURTH ENG DIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the process of external prestressing construction, when the external cables are anchored, the tension is small, and the high strength of the external cables cannot be used; in addition, because the external cables are arranged outside the bridge section, they are easily affected by the external environment, making them vulnerable to Corrosion, affecting the service life of the external cable

Method used

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  • External prestress reinforcing structure of continuous rigid frame bridge
  • External prestress reinforcing structure of continuous rigid frame bridge
  • External prestress reinforcing structure of continuous rigid frame bridge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1 is basically as attached figure 1 Shown: the external prestressed reinforcement structure of the continuous rigid frame bridge, including multiple anchor mechanisms fixed on the outer side of the bridge body and the external prestress beams arranged between the anchor mechanisms, two adjacent anchor mechanisms are arranged facing each other, The external prestressing bundle includes four external cables 14, and the external cables 14 in this embodiment are steel strands. The anchoring mechanism includes a fixing assembly for fixing the outer cable 14 and an adjusting stretching assembly arranged at the end of the fixing assembly for adjusting the tension of the outer cable 14 .

[0033] The fixing assembly includes an anchoring block 1 fixed on the outside of the bridge body. The anchoring block 1 in this embodiment is a concrete anchoring block 1, and an anchor for fixing external prestressed beams is fixed in the anchoring block 1 . combine image 3 As ...

Embodiment 2

[0041] The only difference between this embodiment and Embodiment 1 is that a shock-absorbing assembly fixed on the outside of the bridge body and used to limit the position of the outer cable 14 is provided between the steering block 15 and the anchor block 1 . The shock-absorbing component package is fixedly connected to the connecting block on the outside of the bridge body. Two shock-absorbing blocks 16 that can be fastened to each other are hinged on the connecting block. The inner sides of the two shock-absorbing blocks 16 are provided with shock-absorbing grooves. The inner side can be detachably connected with a buffer pad 17. During use, the two damping blocks 16 are provided with one side of the shock absorbing groove facing each other, and the two shock absorbing blocks 16 are interlocked, so that the outer cable 14 is accommodated between the two shock absorbing grooves, and then through bolts or Other connectors connect the two damping blocks 16 together for fixin...

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Abstract

The invention relates to the field of building construction, and particularly discloses an external prestress reinforcing structure of a continuous rigid frame bridge, and the structure comprises a plurality of anchoring mechanisms fixedly connected to a bridge body and external prestress bundles arranged among the anchoring mechanisms, wherein the anchoring mechanism comprises a fixing assembly for fixing the external prestress bundles and an adjusting and stretching assembly arranged at the end part of the fixing assembly and used for adjusting the tension force of the external prestress bundles. The external prestress reinforcing structure of the continuous rigid frame bridge realizes the reinforcement of a bridge, ensures the transportation safety and prolongs the service life of the bridge.

Description

technical field [0001] The invention relates to the field of building construction, in particular to an external prestressed reinforcement structure of a continuous rigid frame bridge. Background technique [0002] As an important part of the transportation hub channel, the bridge plays an extremely important role in the process of national economic construction and development. With the continuous deepening of the construction of high-speed and passenger dedicated lines, and the continuous development of the freight field, the stability of bridge pavement has been paid more and more attention by the construction field. During the load-carrying and transportation process of the bridge pavement, due to its large load effect during use, it will lead to a decrease in the strength, stiffness and stability of the bridge structure, resulting in a shortened service life of the bridge, such as my country's Daqin Line, Shuohuang After several years of heavy-duty operation of the line...

Claims

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Application Information

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IPC IPC(8): E01D22/00
CPCE01D22/00
Inventor 马成张国栋时小兵罗峙
Owner CHINA CONSTR FOURTH ENG DIV
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