Anticorrosion structure of unbounded prestressed anchorage device

Abstract

The invention provides an anticorrosion structure of an unbounded prestressed anchorage device. The anticorrosion structure comprises an anchorage device end anticorrosion device located above an anchorage base plate, and a sealing structure arranged between an anchorage plate of the anchorage device end anticorrosion device and the anchorage base plate; m small grooves are further formed in the anchorage plate and the anchorage base plate of an unbounded tendon anticorrosion anchorage device; one layer of anticorrosion sealant is arranged for coating between the anchorage plate and the anchorage base plate; the value range of m is that the m is an arbitrary integer selected from 1, 2, 3 and 4. The anchorage device end anticorrosion device comprises a bolt, a rubber pad, a clamping piece, the anchorage plate, a protective sleeve which covers an unbounded tendon end without a PE sleeve, a sealing bolt and anticorrosion grease fed into an oil sealing cover; the clamping piece is anchored on the anchorage plate; the rubber pad is located between the protective sleeve and the anchorage base plate; the anticorrosion sealant is arranged for coating between the anchorage base plate and the rubber ad, and between the rubber pad and the protective sleeve. According to the structure provided by the invention, the anticorrosion sealant is additionally arranged on contact surfaces of all parts, so that the sealing performance of the structure is effectively guaranteed; the anticorrosion structure is simple in structure and convenient to construct, and the problem that an existing unbounded tendon anchorage head anticorrosion device leaks oil is solved very well.

Description

technical field [0001] The invention relates to an anti-corrosion structure of an unbonded prestressed anchorage. The structure is fully enclosed and protected for the unbonded prestressed system, and fully complies with the requirements for two or three in JGJ92-2004 "Technical Regulations for Unbonded Prestressed Concrete Structures". Requirements for closed and anti-corrosion connections of unbonded prestressed anchorage systems in similar environments. Background technique [0002] During the use of external prestressed anchors, they are in contact with the outside air for a long time, and the anchors and prestressed steel strands are prone to corrosion problems, resulting in prestress loss or even failure, which endangers structural safety. The PE sheath solves the anti-corrosion problem of the externally prestressed steel strands very well, but the PE sheath and grease must be removed from the tension sections at both ends to ensure the bite of the clip and the steel s...

AI Technical Summary

Problems solved by technology

As far as the current information is concerned, there is no good solution to the sealing problem of the joint parts of the unbonded prestressed anchorage system in China.

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