Low stressed self anchoring method for group anchor steel tension cables

A steel strand, low-stress technology, applied in the direction of cable-stayed bridges, bridge parts, bridge forms, etc., can solve the problems of heavy lifting equipment, high brittleness, low safety reserve, etc., and achieve effective anchorage area increase and fatigue resistance performance Improvement, fatigue performance improvement effect

CN1424465AInactive Publication Date: 2003-06-18柳州市威尔姆预应力有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2003-06-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

A low-stress self-anchoring method for steel guy cables includes such steps as streching the first guy cable to designed stress value, anchoring it, repeating said steps for all guy cables, restretching the first one to make the values displayed by digitial strainer consistant, reanchoring, reversely installing anchor plate and anchorage, and anchoring them. Its advantages are high reliability, high fatigue strength and low cost.
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Description

technical field

[0001] The invention relates to a method for self-anchoring under low stress of group anchor steel strand cables. Background technique

[0002] Existing steel strand cable-stayed bridges and hanger bridges, as bridges with larger spans, have been flourishing in the construction of bridges because of their beautiful appearance and economical materials. In the application, the research mainly focuses on the material and structure of the cable. Because of its unique advantages such as convenient cable manufacturing, simple transportation, and low hoisting cost, group anchor steel strand cables have a tendency to gradually replace other cable systems. However, the group anchor cables currently used in the market all have the following problems:

[0003] 1. Since the self-anchoring condition of the group anchor steel strand cable is established, the power source comes from the reaction force of the elastic extension of the steel strand,...

Examples

Embodiment approach

[0034] The best implementation mode of the present invention is:

[0035] (1), install reaction force frame 4, make it be connected with supporting cylinder 2 by threaded connection; Single-hole force sensor 8 is installed on the first tensioned steel strand 12, and is connected with digital strain gauge 6, installs single Hole tool anchor assembly 13, then zero-adjust the digital strain gauge 6, use a single-hole front clip jack 13 to push against the inner side of the reaction frame 4, stretch the first steel strand 12 to the designed force value, and tighten it with a tool the tool clip in the tool anchor assembly 13;

[0036] (2), install the single-hole force sensor 9 on the second steel strand 12, and connect it with the digital strain gauge 10, and adjust zero, push the outer end surface of the reaction force frame 4 with the front clip jack 11 of the single hole Perform tensioning so that the force value displayed by the digital strain gauge 6 is consistent with the f...