Sealing structure and method of in-plane prestressed reinforcement channel of segmental beam splicing

A technology of prestressed tendons and sealing structures, applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve problems such as poor sealing effect, and achieve the effects of preventing stress corrosion, avoiding water and ventilation, and improving durability and stiffness.

Pending Publication Date: 2019-01-18
TIANJIN CHENGJIAN UNIV
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  • Abstract
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Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention provides a sealing structure and method for the prestressing tendon channel in the segmental beam splicing surface which solves the problem of poor sealing effect of the sealing structure of the prestressing tendon channel of the existing segmental beam

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  • Sealing structure and method of in-plane prestressed reinforcement channel of segmental beam splicing

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Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0018] In order to solve the problem of the poor sealing effect of the prestressed tendon channels of the existing segmental beams, the present invention provides a sealing structure and method for the prestressed tendon channels in the splicing surface of the segmental beams, which can greatly improve the sealing effect and effectively improve the performance of bridges. The corrosion resistance of the prestressed tendons improves the stiffness and life of the bridge. In order to further illustrate the structure of the present invention, in conjunction with accompanying drawing detailed description is as follows:

[0019]...

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Abstract

The invention discloses a sealing structure and a method of the in-plane prestressed reinforcement channel of a segmental beam splicing and belongs to the technical field of bridge construction. The sealing structure includes two segments of beam, One end of the two segmental beams respectively has corresponding splicing surfaces, and the two segmental beams are provided with internal stress rib channels, wherein the splicing surfaces of the two segmental beams are respectively provided with annular protrusions and annular grooves adapted to each other and surrounding the internal stress rib channels, and the annular grooves are provided with sealants. The annular convex part and the annular groove part are matched to form an effective partition structure, and the sealant with sealing effect is matched to effectively partition the moisture and gas of the prestressed tendon channel at the joint of the segmental beam, thereby avoiding water permeability and air permeability, preventing stress corrosion of the prestressed tendon more efficiently, and improving the durability of the bridge.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a sealing structure and a method for a prestressed tendon channel in a joint surface of a segmental beam. Background technique [0002] Cantilever assembly construction is a construction method of bridge cantilever construction. During the construction process, the sealing of prestressed tendon channels is one of the difficulties in the project. Good sealing can make the connection of segmental beams more tightly, prevent the stress corrosion of prestressed steel bars, and improve the durability of bridges. At the same time, the sealing of the channel is conducive to the smooth progress of the subsequent pipeline grouting construction. Especially in the bridge engineering using the vacuum grouting process, the sealing condition of the prestressed cable channel in the segmental beam splicing surface directly determines whether the cable channel can be pump...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/10
CPCE01D21/10
Inventor 王海良曹亮杨新磊任权昌董鹏
Owner TIANJIN CHENGJIAN UNIV
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