Intelligent fiber reinforced plastic (FRP) anchor rod

A technology of fiber-reinforced plastics and reinforced plastics, applied in the installation of anchor rods, sheet pile walls, mining equipment, etc., to achieve excellent intelligent perception characteristics, high durability cutting, and easy cutting effects

Active Publication Date: 2011-08-03
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-strength, light-weight, corrosion-resistant fiber-reinforced plastic intelligent anchor with self-monitoring function, which solves the technical problems of long-term stable and reliable testing of the anchor's anti-corrosion and stressed state

Method used

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  • Intelligent fiber reinforced plastic (FRP) anchor rod
  • Intelligent fiber reinforced plastic (FRP) anchor rod
  • Intelligent fiber reinforced plastic (FRP) anchor rod

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Embodiment Construction

[0020] Specific embodiments of the present invention will be described in detail below in conjunction with technical solutions and accompanying drawings.

[0021] (1) The structure of the anchor rod

[0022] Fiber-reinforced plastic intelligent bolt structure of the present invention constitutes as figure 1 and figure 2 As shown, the anchor rod includes: 1 fiber-optical fiber grating sensor; 2 fiber grating sensor; 3 fiber reinforced plastic wrapping layer; 4 optical fiber protection sleeve; The fiber-optic grating sensor and the fiber-reinforced plastic wrapping layer form the bolt body. The end of the rod body is provided with a force-transmitting anchor head suitable for the force characteristics of the bolt, and the end of the rod body is provided with an optical fiber protection sleeve. Among them, the fiber-fiber grating sensor is a single-mode optical fiber with one or more fiber gratings (such as figure 1 (a), figure 2 (a)), or two sensing fibers are arranged in ...

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Abstract

The invention provides an intelligent fiber reinforced plastic (FRP) anchor rod, and belongs to the technical field of safety monitoring of geotechnical engineering. The intelligent FRP anchor rod is characterized in that the rod body is sequentially equipped with a fiber-fiber Bragg grating (FBG) sensor and an FRP wrapping layer from inside to outside, wherein the fiber-FBG sensor refers to a single-mode fiber in which one or more FBGs are written, or two parallel sensing fibers (including one common single-mode fiber and one single-mode fiber in which one or more FBGs are written). In the invention, the fiber-FBG sensor respectively transmits the sensed temperature or strain optical signals to a Raman optical time-domain reflectometry (ROTDR) demodulator, a Brillouin optical time-domainanalysis/reflectometry (BOTDA/R) demodulator and an FBG demodulator through optical switch connection and conversion. The intelligent FRP anchor rod has the beneficial effects that the embedded fiber-FBG sensor integrates test advantages of an ROTDR temperature measurement technology, a BOTDA/R test technology and an FBG test technology, thus improving reliability for long-term test of ambient temperature and strain state of the anchor rod.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering safety monitoring, and relates to a high-strength, light-weight, corrosion-resistant fiber-reinforced plastic intelligent bolt with self-monitoring function. Background technique [0002] As a support structure that fully excavates and improves the strength and self-stabilization of rock and soil, the anchor has the advantages of convenient construction and simple operation. It has been used in coal mines and mine roadway support, slope foundation pit support, bridge tunnels It is widely used in supporting, building foundation reinforcement and other projects. For example, in the world-renowned Three Gorges Water Conservancy Project, more than 100,000 high-strength anchor rods were used for partial or systematic reinforcement to improve the stability of the ship lock slope in the weathered rock formation. However, the steel anchors commonly used in engineering still have the disad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/74E02D5/76E02D33/00E21D21/02
Inventor 周智黄明华何建平欧进萍
Owner DALIAN UNIV OF TECH
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