Prestressed truss end base structure and construction method

Abstract

The invention relates to a base structure at the end of a prestressed truss, comprising: a base vertically arranged on the top of the corresponding concrete support column; a connecting piece placed horizontally on the corresponding base, and the connecting piece The first end is fixedly connected to the corresponding end of the lower chord, the second end of the connector is fixedly connected to the corresponding base, the size of the first end is smaller than the size of the second end and a gradual connection is formed, The connecting part is hollow inside; a stress mechanism that penetrates from the connecting part at one end of the lower chord and passes out from the connecting part at the other end of the lower chord, and the end of the stress mechanism Located on the outside of the corresponding connecting piece; and an anchor mechanism arranged in the connecting piece, through which one end of the stress mechanism is anchored, and after the other end of the stress mechanism is tensioned and prestressed , and then anchor the other end of the stress mechanism through the anchor mechanism.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a prestressed truss end base structure and a construction method. Background technique [0002] At present, the end base structures of the trusses on both sides of the hangar gate cannot meet the construction requirements of prestressed steel strands. Among them, the existing design uses full-length prestressed steel pipes. The force transmission path of the anchorage at the end is unfavorable to the structure, and cannot effectively tension and anchor the steel strand. At the same time, the existing design diaphragm is relatively weak in restraining the sleeve, and the restraining sleeve is restrained during the prestressing stage. It is prone to movement, which is not conducive to further anchoring and installation, and the grouting structure effect is not good, and the concrete structure is prone to filling dissatisfaction, resulting in hidden quality problems. ...

AI Technical Summary

Problems solved by technology

[0002] At present, the end base structures of the trusses on both sides of the hangar gate cannot meet the construction requirements of prestressed steel strands. Among them, the existing design uses full-length prestressed steel pipes. The force transmission path of the anchorage at the end is unfavorable to the structure, and cannot effectively tension and anchor the steel strand. At the same time, the existing design diaphragm is relatively weak in restraining the sleeve, and the restraining sleeve is restrained during the prestressing stage. It is prone to movement, which is not conducive to further anchoring and installation, and the effect of grouting structure is not good, and the concrete structure is prone to filling dissatisfaction, causing quality hidden dangers

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