Method and device for anchoring changeable prestressing force of suspension bridge

A prestressing and replacement technology, applied in bridges, bridge parts, bridge maintenance, etc., can solve problems such as difficult to judge prestressed steel tendons, unreliable corrosion protection, difficult detection and maintenance, etc.
CN101215822AInactive Publication Date: 2008-07-09CCCC SECOND HIGHWAY CONSULTANTS CO LTD +1
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Patent Information

Authority / Receiving Office
CN Ā· China
Patent Type
Applications(China)
Current Assignee / Owner
CCCC SECOND HIGHWAY CONSULTANTS CO LTD
Publication Date
2008-07-09
Estimated Expiration
Not applicable Ā· inactive patent

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Abstract

The invention discloses a suspension bridge anchor replaceable prestressing method and a device, wherein the method comprises: a, designing the preconditions of different phases, wherein a whole bunch of prestressing meets the endurance safety conditions of main cables and the short time status safety conditions when the n' pieces of cables are replaced and relaxed; b, latterly judging cables replacing conditions; c, the replacing type is the underpinning type with relaxed pieces less than n' pieces each time; d, cables replacing method, wherein the replacing adopts single or a plurality of pieces underpinning type, anchor removing pieces number n' is less than the number of the short time status safety conditions. The device comprises a beehive embedded pipe, a prestressing tendon, an anchor pad plate, an anchor plate, a clip, a check damper, a protection cover, a spiral reinforcement under anchor, an antisepsis grease, a hexagon steel sleeve, an anti-leakage end plate and an outer hexagon steel sleeve. The method of the invention is easy and convenient for replacements, safe and reliable, has simple structure, powerfully realizes the maintenance of the whole bunch of prestressing tendons, and greatly improves the bridges safety and reliability.
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Description

technical field

[0001] The present invention relates to the technical field of prestressing for suspension bridge anchors, more specifically to a method for replaceable prestressing of suspension bridge anchorages, and also to a replaceable prestressing device for bridge anchorages. Under the premise of effectively anchoring the main cable strands and ensuring the safety of the bridge, the multi-strand prestressing tendons that constitute the whole bundle of prestressing are replaced, so as to realize the unbonded prestressing structure of the bridge's later maintainability. Background technique

[0002] The anchorage is the key structure for the suspension bridge to bear the force and load, and it plays the role of transmitting the tension of the main cable to the foundation. The force transmission method between the anchorage and the foundation is generally divided into two types: gravity anchorage and tunnel anchorage. The gravity type anchorage relies on the self-weight...

Claims

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