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Cable tension uniformity monitoring system for parallel steel strand stay cable and construction method thereof

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

Pending Publication Date: 2019-03-12
LIUZHOU OVM STRUCTURE INSPECTION TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 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 tension uniformity monitoring system for parallel steel strand stay cable and construction method thereof

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Effect test

Embodiment approach 1

[0018] Such as figure 1 As shown, the cable force uniformity monitoring system for parallel steel strand cable-stayed cable construction is characterized in that it includes a working anchor plate 7, a working clip 8, a top pressure jack 1, a magnetic flux sensor 2, a tension jack 3, and a multi-channel switch Box 4, magnetometer 5 and host computer 6; the working anchor plate 7 is worn on the steel strand stay cable 9, the working clip 8 is located on the working anchor plate 7, and the working anchor plate 7 and the working clip 8 are used It is used to fix the stay cable 9 of the steel strand; the jack 1 is installed on the rear end of the working anchor plate 7, and is used to tighten the working clip 8 after the tensioning is completed; the tensioning jack 3 is installed on the jack The rear end of the jack 1 is used for the overall tensioning of the steel strand stay cables 9; the magnetic flux sensor 2 is installed on the steel strand stay cables 9 between the top press...

Embodiment approach 2

[0020] Embodiment 2 is a further optimization of Embodiment 1. The magnetoelastic instrument used has an operating platform and an LCD display for direct reading.

Embodiment approach 3

[0022] The method for carrying out construction using the cable force uniformity monitoring system for cable-stayed cable construction with parallel steel strands comprises the following steps: Step 1, installation of the cable force uniformity monitoring system for cable-stayed cable construction with parallel steel strands; Determine the 0-100% F graded tensioning process of steel strand stay cables 9, start tensioning jacks 3 pairs of parallel steel strand stay cables 9 overall graded tensioning; step 3, after each level of tension cable force is loaded, During the pressure holding time, the host computer 6 controls the multi-channel switch box 4 to switch the monitoring channel to monitor each magnetic flux sensor 2, and uses the monitored cable force value of each steel strand stay cable 9 as the tension control force value , and record the cable force value of each steel strand stay cable 9; step 4, the upper computer 6 reads the cable force value monitored by the magneti...

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Abstract

The invention discloses a cable tension uniformity monitoring system for parallel steel strand stay cable and construction method thereof. The construction method comprises the following steps: establishing a monitoring system, determining a graded tension process, monitoring tension of the stay cable, screening the unqualified tension, compensating tension, jacking and anchoring, unloading the monitoring system, and constructing the next steel strand stay cable. The cable tension uniformity monitoring system for parallel steel strand stay cable and construction method thereof solves the problems that the traditional cable tension cannot be monitored or only the integral cable can be monitored and a basis for adjusting the cable force aiming at the uneven cable force of a single steel strand cannot be provided. When the stay cable is integrally tensioned, the uniformity of each steel strand is controlled by monitoring the cable force value of each steel strand step by step, so that thecable force adjustment between each steel strand is facilitated. The method has the advantages of high degree of automation, high control precision, low labor cost investment, high work efficiency, safety, 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. As a result, the previously tensioned steel strands relax and the cable force becomes smaller. If each steel strand is stretched according to the equivalent value of the total cable force, it will inevitably cause the situation that the actual construction cable force does not match the theory, and the control accuracy o...

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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