Wire rope extensometer protective device for monitoring tension stress of prestressed reinforcement

A technology of prestressed steel bars and tensile stress, applied in measuring devices, force/torque/power measuring instruments, instruments, etc., can solve problems such as loss of function, achieve good protection, small size, and long service life

Inactive Publication Date: 2013-05-22
SHENYANG JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the concrete sets and hardens, it will limit the expansion and contraction of the cable gauge, thus making it useless

Method used

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  • Wire rope extensometer protective device for monitoring tension stress of prestressed reinforcement
  • Wire rope extensometer protective device for monitoring tension stress of prestressed reinforcement
  • Wire rope extensometer protective device for monitoring tension stress of prestressed reinforcement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] like figure 1 The present invention is shown as a steel cable gauge protection device for monitoring the tensile stress of prestressed steel bars. Both ports of the columnar hollow pipe body 1 are provided with plugging 3; one end is a fixed port plugging; the other end is a movable The port is blocked, and the plug 3 is provided with a through hole 2, and the outer diameter of the plug 3 is larger than the outer diameter of the pipe body 1. The pipe body 1 is made of round steel pipe, with an outer diameter of 8-12 cm, a length of 0.6-1.0 m, and a thickness of 3-5 mm. The outer surface of the pipe body 1 is welded with a φ6 spiral steel bar 5 to strengthen the anchorage between the pipe body 1 and the concrete. Two through holes 4 are provided at the matching position of the pipe body 1 , one of which is provided in the middle as an oil injection hole, and the other is provided at the edge as a lead-out hole.

Embodiment 2

[0021] The pipe body 1 is made of a square steel pipe, and the outer surface of the pipe body 1 is welded with a φ6 spiral mechanical notch 5 to enhance the anchorage between the pipe body 1 and the concrete. Others are the same as in Embodiment 1, and will not be repeated.

[0022] When using it specifically:

[0023] like figure 2 , image 3 As shown, first the fixed port is blocked and welded to the center of the pipe body 1, and then the prestressed steel bar 7 is penetrated from the through hole 2 blocked by the movable port, and passed out from the through hole 2 blocked by the fixed port. When the prestressed steel bar 7 is 0.6~1m away from the design position, stop threading the bar. At this time, the outer cladding of the prestressed steel bar 7 is peeled, and the steel cable gauge 6 is installed according to the design position of the steel cable gauge. Then the prestressed steel bar 7 and the steel cable meter 6 are inserted into the suitable position in the pi...

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Abstract

The invention discloses a wire rope extensometer protective device for monitoring tension stress of prestressed reinforcement. Blocks are arranged at two ends of a columnar hollow tube body of the wire rope extensometer protective device for the monitoring tension stress of the prestressed reinforcement, thru holes are further formed in the blocks, helical reinforcement and helical mechanical nicks are arranged on the outer surface of the tube body to enhance anchoring of the tube body and concrete. By means of the wire rope extensometer protective device for the monitoring tension stress of the prestressed reinforcement, the key technical problem of monitoring the tension stress of the prestressed reinforcement inside a prestressed concrete member with a vibration wire type wire rope extensometer is solved, the use of the vibration wire type wire rope extensometer enables monitoring data to have the advantages of being stable and reliable, and thus long-term monitoring is guaranteed. The wire rope extensometer protective device for the monitoring tension stress of the prestressed reinforcement is small in size, low in weight and high in strength and stiffness, the wire rope extensometer protective device, thus a protective effect to a sensor is achieved, thus the wire rope extensometer can stretch freely and move in a small range inside the concrete member, thus monitoring to the tension stress of the prestressed reinforcement is achieved, and entire stress performance of a structure is influenced lightly.

Description

technical field [0001] The invention relates to a protection device for a wire gauge, in particular to a wire gauge protection device for monitoring the tensile stress of prestressed steel bars. Background technique [0002] Prestressed concrete structure is a very important structural form in civil engineering. The application of prestressed concrete covers various aspects in the field of civil engineering, such as large public buildings, long-span bridge structures and large water conservancy and power facilities. These buildings occupy an important position in the country's economic production. If there are structural problems during service, it may cause engineering accidents and cause adverse social impacts. Therefore, it is particularly necessary to carry out corresponding health monitoring work during the construction and service phases of important prestressed concrete structures. [0003] Structural health monitoring technology has become a hot spot in the field ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/00
Inventor 王强孙威王占飞金峤刘琳
Owner SHENYANG JIANZHU UNIVERSITY
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