Corrosion monitoring of rock bolt by using a low coherent fiber-optic interferometry

Wei, Heming; Zhao, Xuefeng; Li, Dongsheng; Zhang, Pinglei; Sun, Cheng

doi:10.1016/j.optlastec.2014.10.004

Cited by 35 publications

(15 citation statements)

References 20 publications

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“…On the account that voluminous corrosion products will exert expansive stress on the surrounding rock mass, Wei et al [ 56 ] proposed a method to monitor rock bolt corrosion in an early stage by measuring the corrosion-induced strain using a fiber-optic Michelson interferometer. Two schemes of winding optical fiber on the rock bolt were tested: one directly wound the fiber on the rock bolt and another one, with a mortar cushion, was placed between the fiber and the rock bolt.…”

Section: Rock Bolt Monitoring Using Smart Sensorsmentioning

confidence: 99%

See 1 more Smart Citation

A Review of Rock Bolt Monitoring Using Smart Sensors

Song

Wang

et al. 2017

Sensors

114

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Rock bolts have been widely used as rock reinforcing members in underground coal mine roadways and tunnels. Failures of rock bolts occur as a result of overloading, corrosion, seismic burst and bad grouting, leading to catastrophic economic and personnel losses. Monitoring the health condition of the rock bolts plays an important role in ensuring the safe operation of underground mines. This work presents a brief introduction on the types of rock bolts followed by a comprehensive review of rock bolt monitoring using smart sensors. Smart sensors that are used to assess rock bolt integrity are reviewed to provide a firm perception of the application of smart sensors for enhanced performance and reliability of rock bolts. The most widely used smart sensors for rock bolt monitoring are the piezoelectric sensors and the fiber optic sensors. The methodologies and principles of these smart sensors are reviewed from the point of view of rock bolt integrity monitoring. The applications of smart sensors in monitoring the critical status of rock bolts, such as the axial force, corrosion occurrence, grout quality and resin delamination, are highlighted. In addition, several prototypes or commercially available smart rock bolt devices are also introduced.

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Section: Rock Bolt Monitoring Using Smart Sensorsmentioning

confidence: 99%

“…( a ) The uncompensated results without the reference fiber; ( b ) The results after being compensated by the reference sensing fiber. [ 56 ].…”

Section: Figurementioning

confidence: 99%

A Review of Rock Bolt Monitoring Using Smart Sensors

Song

Wang

et al. 2017

Sensors

114

View full text Add to dashboard Cite

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“…The method further considered that the presence of sulfide in pore solution had a great impact on the steel potential [84]. 2) In order to evaluate the steel corrosion-based deterioration in an early age, an array low-coherent fiber optic sensor system was developed [85]. This system could effectively monitor the corrosioncaused expansion at the accuracy of sub-micro strains by circled the sensing optical fiber in two configurations.…”

Section: Steel Corrosionmentioning

confidence: 99%

“…One was to wire the fiber on the surface of steel rock bolt directly; the other was to circle the fiber on a mortar cushion. From the comparison of these two configurations, an interface dominated corrosion process was very sensitive to the uniformity of the interface formed on the steel [85]. 3) Active corrosion with an external anodic current of 5 mA/cm 2 was induced by corroding steel embedded in cement paste in an X-ray microcomputed tomography study [86].…”

Section: Steel Corrosionmentioning

confidence: 99%

Recent durability studies on concrete structure

Tang

Yao

Andrade

2015

Cement and Concrete Research

450

121

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“…The acoustic wave method can explore the corrosion interface directly for indirect corrosion assessment, but it is limited by resolution that is typically in the range of 0.2-200 mm corresponding to the frequency from 20 kHz to 20 MHz. 10,11 Recently, corrosion monitoring based on fiberoptic techniques has attracted more attention. Compared with conventional sensors in many practical applications, especially in environments with electromagnetic noise immunity and chemical aggressive ions, fiber-optic sensors provide practicality and flexibility, which are capable of making distributed/quasidistributed measurements and possessing long-term reliability.…”

Section: Introductionmentioning

confidence: 99%

Low-coherent fiber-optic interferometry for in situ monitoring the corrosion-induced expansion of pre-stressed concrete cylinder pipes

Wei

Liao

Zhao

et al. 2019

Structural Health Monitoring

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The corrosion-induced expansion of pre-stressed concrete cylinder pipes shapes a major determining factor in the durability of most pipeline systems. However, a structure extended in a very large span and accompanied by a slow corrosion-induced structural damage is still a challenge in practice. Here, a low-coherent fiber-optic interferometry is proposed for in situ measuring the corrosion-induced expansion by directly circling the sensing optical fiber on the outer surface of the pipe. Since the accuracy of the absolute deformation measurement by the low-coherent fiber-optic interferometry can reach 3–5 μm, we are able to improve the sensitivity by choosing the length of the sensing fiber. In the experiment, we employ 50-m sensing fiber; therefore, a resolution of about 0.1 microstrains had been approached. We chose 12 places along the pipeline as the corrosion-induced expansion monitoring points. On monitoring for about half a year, a non-uniform interface in structure, such as the repaired places, was found as a key factor of the corrosion-induced expansion development, which could be a reference for the further health care of the pipeline structures.

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Corrosion monitoring of rock bolt by using a low coherent fiber-optic interferometry

Cited by 35 publications

References 20 publications

A Review of Rock Bolt Monitoring Using Smart Sensors

A Review of Rock Bolt Monitoring Using Smart Sensors

Recent durability studies on concrete structure

Low-coherent fiber-optic interferometry for in situ monitoring the corrosion-induced expansion of pre-stressed concrete cylinder pipes

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