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Method for applying prestress to concrete pipe gallery

A concrete and prestressing technology, used in construction, artificial islands, infrastructure engineering, etc., can solve the problems of no effective method for establishing prestressing in the post-casting section, and the inability to apply prestressing over the entire length, so as to prevent cracking and leakage. Effect

Active Publication Date: 2021-08-06
JILIN JIANZHU UNIVERSITY
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The traditional method of constructing the concrete pipe gallery is to apply prestress. If the continuous construction will restrict the construction efficiency and speed, if the construction is carried out in sections, the construction efficiency and speed can be improved. However, there is no effective method for establishing prestress in the post-cast section after the section , so most concrete pipe galleries have the problem that prestress cannot be applied to the full length

Method used

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Examples

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Embodiment Construction

[0021] A method for applying prestress to a concrete pipe gallery, specifically comprising the following implementation steps, and the following steps are carried out in sequence,

[0022] Step 1. Apply prestress to the concrete of the pipe gallery in the first construction section

[0023] The traditional method is used to construct the concrete pipe gallery of the first construction section with more than two sections. After the cast-in-place concrete or cement-based materials for connection of poured or fabricated concrete pipe gallery reach the design strength after curing, apply effective prestress to the concrete pipe gallery along the longitudinal direction N P , N P including N P1 and N P2 Two parts, namely N P =N P1 +N P2 , N P1 and N P2 applied by separate prestressing systems, and N P1 and N P2 The action centers of each independently coincide with the centroid of the section of the concrete pipe gallery, N P1 Applied by a non-removable permanent prestres...

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Abstract

The invention discloses a method for applying prestress to a concrete pipe gallery, and belongs to the technical field of civil engineering. Prestress including permanent prestress and temporary prestress is applied during early construction of a first construction section concrete pipe gallery. The temporary prestress applied during early construction of the first construction section of the concrete pipe gallery is released, the released prestress builds prestress for concrete of the later construction section of the pipe gallery, and therefore the purpose that prestress is applied to the whole section of the concrete pipe gallery is achieved, and cracking and leakage of the concrete pipe gallery can be effectively prevented.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and relates to underground concrete engineering construction, in particular to a method for applying prestress to a concrete pipe gallery. Background technique [0002] At present, due to the long length of concrete pipe gallery projects, most of which are measured in kilometers, this kind of ultra-long underground wall concrete project is affected by the shrinkage characteristics of concrete, causing cracking and leakage are very common. [0003] Practical experience shows that applying prestress to the concrete pipe gallery along the longitudinal direction is an effective means to prevent cracking and leakage. [0004] The traditional method of constructing the concrete pipe gallery is to apply prestress. If the continuous construction will restrict the construction efficiency and speed, if the construction is carried out in sections, the construction efficiency and speed can be impro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/045
CPCE02D29/10
Inventor 孟凡林孟祥瑞吴永亮
Owner JILIN JIANZHU UNIVERSITY
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