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Cable-force uniformity monitor system and construction method for construction of parallel steel strand inclined stay cable

A technology of parallel steel strand and monitoring system, applied in tension measurement, bridge parts, erection/assembly of bridges, etc., can solve problems such as beam deformation and uneven force, achieve high work efficiency, low labor cost input, and simple operation Effect

Active Publication Date: 2018-12-25
LIUZHOU OVM STRUCTURE INSPECTION TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention aims at the problem of deformation of bridge towers and girders caused by uneven stress on steel strands during the existing cable-stayed cable construction stage, and provides a cable force uniformity monitoring system and construction method for cable-stayed cable construction with parallel steel strands

Method used

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  • Cable-force uniformity monitor system and construction method for construction of parallel steel strand inclined stay cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0016] A cable force uniformity monitoring system for parallel steel strand cable-stayed cables during construction, characterized in that it includes a tension end and a fixed end of steel strand cable-stayed cables, and the steel strand tension end includes a working anchor Plate 3, working clip 4, top pressure jack 2, tension jack 1, working anchor plate 3 is worn on steel strand stay cable 9, working clip 4 is located on working anchor plate 3, and the top pressure jack 2 Installed on the rear end of the working anchor plate 3, it is used to tighten the working clip 4 after the tensioning is completed; pull; the pressure sensor 5 is installed on the steel strand stay cable 9 at the fixed end of the steel strand stay cable, and each steel strand stay cable 9 is equipped with a pressure sensor 5; A grip-wrapped anchorage tied on the steel strand stay cable 9 is used to form pressure on the pressure sensor 5 when the steel strand stay cable 9 is stretched; the data acquisitio...

Embodiment approach 2

[0018] The process of using this system to monitor the construction of steel strand stay cables is as follows: step 1, installation of the cable force uniformity monitoring system for parallel steel strand stay cables; step 2, determining the steel strand stay cable according to the tension force 0-100% F graded tensioning process of 9, start the tensioning jack 1 top pair of parallel steel strand cables 9 overall graded tensioning, squeeze the sleeve and squeeze the pressure sensor; step 3, after the tensioning force of each stage is loaded , within the pressure holding time, the upper computer 8 controls the data acquisition module 7 to collect the data of the pressure sensor 5, and uses the cable force value of each steel strand stay cable 9 collected as the tension control force value, and records The cable force value of each steel strand stay cable 9; step 4, the upper computer 8 reads the cable force value monitored by the pressure sensor 5 through the data acquisition m...

Embodiment approach 3

[0020] On the basis of Embodiment 2, the graded tensioning in step 2 can be divided into five grades of tensioning: 20% F, 40% F, 60% F, 80% F, and 100% F.

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Abstract

The invention discloses a parallel steel strand cable construction cable force uniformity monitoring system and a construction method. The monitoring system comprises a top pressure jack, a tensioningjack, a pressure sensor, a squeeze sleeve, a data acquisition module and an upper computer. The number of pressure sensors is the same as that of stranded wires, and the jacking jack is arranged at the rear end of the parallel stranded wire working anchor, which is used for tightening the working clamps after the tensioning is completed. Tensioning jack is used for parallel steel strand cable tensioning; The pressure sensor is arranged in the tensioning jack and the extrusion sleeve; The host computer is connected with the data acquisition module, the data acquisition module reads the voltagesignal of the pressure sensor, and the host computer records, screens and stores the cable force value. When the whole system is stretched, the cable force value of each strand is monitored step by step to control the uniformity of each strand, and it is convenient to adjust the cable force between each strand. The system has the advantages of high automation degree and control precision, less manual investment, high efficiency, safety and reliability, simple operation and convenience for standardized construction.

Description

technical field [0001] The invention belongs to the field of cable force monitoring and construction technology in the construction stage of steel strand cable-stayed cables, and in particular relates to a cable force uniformity monitoring system and construction method for parallel steel strand cable-stayed cable construction. Background technique [0002] The parallel steel strand stay cable is a group anchor stay cable composed of a single anti-corrosion steel strand, which adopts the form of a single steel strand hanging cable and a single steel strand tension. The uniformity of the wire tension will lead to the deformation of the bridge tower and beam, which will lead to the relaxation of the previously tensioned steel strand and the decrease of the cable force. If each steel strand is stretched according to the average equivalent value of the total cable force, it will inevitably cause the situation that the actual construction cable force does not match the theory, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D19/16G01L5/04
CPCG01L5/04E01D19/16E01D21/00
Inventor 杨赓韦福堂李居泽廖恒何弦阳
Owner LIUZHOU OVM STRUCTURE INSPECTION TECH
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