Method for implementing the middle connection tensioning of cables and device thereof

A tensioning device and technology of steel strands, which are applied in the processing of building materials, construction, building construction, etc., can solve the problems of broken steel strands, insufficient tensioning construction space, and prestressing failure compensation. To achieve the effect of stable working conditions, low construction technical risk and easy control

Inactive Publication Date: 2010-06-23
CCCC ROAD & BRIDGE SPECIAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for testing the effective prestress of a single steel strand, and to solve the problem of steel strand stretching and broken wire repair, prestress failure compensation, and broken steel strand recovery, and at the same time solve the problem that both ends do not have sufficient Method and device for tensioning steel strands connected in the middle of the construction space, thereby overcoming existing technical defects

Method used

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  • Method for implementing the middle connection tensioning of cables and device thereof
  • Method for implementing the middle connection tensioning of cables and device thereof
  • Method for implementing the middle connection tensioning of cables and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as figure 1 As shown, it is an intermediate tensioned steel strand to measure the tension of the steel strand or an intermediate tensioned prestressed anchor.

[0042] Two tool steel strands 2 are arranged on both sides of the steel strand 1, and the two ends of the two tool steel strands 2 pass the open flat anchor 3 to clamp the tool steel strand 2 and the steel strand 1 as a whole. One end of the tool steel strand is provided with a single-hole anchor 4.1, and the single-hole anchor 4.1 is in contact with the end surface of the open flat anchor 3; the other end of the tool steel strand 2 is connected with a tensioning device, which is a tensioning jack 5. The tool steel strand 2 between the open flat anchor 3 and the tension jack 5 is provided with a single-hole anchorage 4.2 (when using the front clamp jack, the root single-hole anchorage does not need to be set). A steel strand clip 6 is provided between the open flat anchor 3 and the steel strand 1 .

Embodiment 2

[0044] Such as figure 2 As shown, a single steel strand connector (or extruded anchor nut connector 10) is used to butt tensioned steel strands. It is a schematic diagram of the structure after tensioning is completed.

[0045] It differs from Embodiment 1 in that the steel strands 1 between the two open flat anchors 3 are broken, and the broken steel strands 1 are connected as a whole through a connector 7 .

Embodiment 3

[0047] Such as image 3 As shown, it is used to extend the connection of tensioned steel strands-internal structure. It is a schematic diagram of the structure after tensioning is completed.

[0048] It differs from Embodiment 2 in that after the steel strand 1 between the two open flat anchors 3 is broken, an extended steel strand 1.1 is provided between the broken steel strands 1, and the lengthened steel strand 1.1 and the steel strand 1 The fractured steel strand 1 and the extended steel strand 1.1 are connected as a whole through two connectors 7 between the fractures.

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Abstract

The present invention discloses a method for implementing the middle connection tensioning of cables and a device thereof. Tool cables are arranged at the sides of the middle sections of the cables. The tool cables and cables are connected into a whole at both ends of each tool cable through opening flat anchors and corresponding anchor fixing devices. One end or two ends of each toot cable are tensioned, and connectors are used for connecting (only rope force is measured without connection) after the tensioning is in place. After the tensioning force of the tool cables is unloaded, the cables suffer tensioning force to realize the connection tensioning of the cables. A butting joint tensioning device avoids tensioning anchor fixing problem of two-end tensioning, provides a new thinking path for the middle tensioning of the cables, and solves a technical problem that the middles of traditional cables are only connected, and can not be tensioned. The butting joint tensioning device can be used for the fields of the solution of the tensioning filament breakage of the cables, exact single cable testing equipment, external inherent stress reinforcement, assistant tensioning reinforcement, the realizing of super-long external rope connection tensioning, failure external rope complementarity reinforcement, connection tensioning for cutting off cable rope bodies and the like. The application fields of reinforcement cables are largely expended.

Description

technical field [0001] The invention belongs to bridge steel strand tensioning construction, and in particular relates to a technology for intermediate connection tensioning of steel strands. Background technique [0002] The tensioning construction of externally prestressed steel strands of existing bridges is carried out at one or both ends of the steel strands, and is suitable for sufficient construction space at both ends of the steel strands. And when there is no sufficient construction space at the two ends of the steel strand or when it is not necessary to stretch the two ends, the above method is no longer applicable, and there is no effective solution at present. [0003] The steel strand may be broken during the tensioning process. In severe cases, it can only be replaced and cannot be repaired from the position of the broken wire. If the steel strand with broken wires is long, it will be difficult and uneconomical to replace. [0004] After the steel strand is te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G21/12
Inventor 张汉生赵东奎朱慈祥王世祥宴国泰白燊强
Owner CCCC ROAD & BRIDGE SPECIAL ENG
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