A Feasibility Study on the Application of Fiber-Optic Distributed Sensors for Strain Measurement in the Taiwan Strait Tunnel Project

Shi, Bin; Xu, Hongzhong; Chen, Bin; Zhang, Dan; Ding, Y.; Cui, Heliang; Gao, Junqi

doi:10.1080/713773406

Cited by 53 publications

(21 citation statements)

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“…Furthermore, the BOTDR technique is environment friendly because it can cope any types of environment owing to its non-metallic quartz-glass structure avoiding electric and electromagnetic interferences and signal errors. Besides, it is compatible to carry and install in any earth structures without giving the impacts of the strength due to its lightweight, thin and flexible nature [25][26][27]. Kato et al [35] discussed the applicability of the BOTDR method prior to mitigate landslides and river embankments by measuring displacements of ground through the single optical fiber which can measure the light transmission time attenuation and distortion of the displacement of phase and the temperature distribution.…”

Section: Fiber Optic Geogrid Straining Using Botdr Methodsmentioning

confidence: 99%

“…Numerous researchers have practiced the usage of fiber optic strain sensors in the field of geotechnical engineering [14][15][16][17][18]. It has been identified that the Brillouin optical time-domain reflectometry (BOTDR) method is highly durable and a powerful fiber optic sensor which measures not only for health diagnosis but also in various engineering sectors for long distance and measures accurately with real-time data based system [19][20][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

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Observation of Static Load of L-Shaped Retaining Wall Constructed on Short Wooden Pile Using Fiber Optic Geogrid BOTDR Method

Manandhar

Miyazoe²,

Fukuoka³

et al. 2016

Indian Geotech J

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The scope of the study was aimed to observe the long-term static load of the L-shaped retaining walls incorporated with fiber optic geogrid using Brillouin optical time-domain reflectometry method at the interval of 55 mm installed with short wooden pile of small diameter. The application of wooden pile in soft ground using the bottom panel system structure of the foundation has been discussed based on the published construction manual referred to the waterway box culvert and pre-cast L-shaped retaining walls to reduce the load on the short wooden pile head using geogrid. The actual vehicle dump truck was used to measure loads passing through the retaining wall after 160 days of construction. The results showed that the load acting on the pile increases with time and approached the allowable bearing capacity of 28.9 kN/pile group. The straining immediate after the construction was detected to be decreased after four months due to stress relaxation on the geogrid. The strain under static live load under a rear wheel of the dump truck to a virtual rear portion of L-shaped retaining wall and at the central portion of the bottom panel width of L-shaped retaining wall yielded the tensile straining in the periphery. It is found that the straining on geogrid is relatively small to be able for bearing the load of the dump truck to some extent.

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Section: Fiber Optic Geogrid Straining Using Botdr Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Observation of Static Load of L-Shaped Retaining Wall Constructed on Short Wooden Pile Using Fiber Optic Geogrid BOTDR Method

Manandhar

Miyazoe²,

Fukuoka³

et al. 2016

Indian Geotech J

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“…The frequency of Brillouin scattered light will generate drift with respect to the frequency of injection pulse light [20,21]. The frequency shift has a linear relationship with axial strain or temperature changes which the fiber suffers [22], as shown in Fig. 1.…”

Section: Working Principle Of Botdrmentioning

confidence: 96%

A field study on distributed fiber optic deformation monitoring of overlying strata during coal mining

Cheng

Shi

Zhu

et al. 2015

J Civil Struct Health Monit

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In this paper, the distributed optical fiber sensing technology based on Brillouin optical time-domain reflectometer (BOTDR) was employed to monitor and analyze the force and deformation of the overlying rock strata during the coal mining process in Huaibei, China. The selection and arrangement of the sensing cables were introduced, together with details on data collection and analysis. Four types of sensing cables were vertically installed into a borehole to monitor the strata deformation. The monitoring data were collected according to the mining schedule. The strain distributions and their variations with time were studied to reveal the deformation pattern of the overlying rock mass induced by coal mining. Results showed that during the mining process, there was a fracture surface at the bottom of the upper igneous rock layer. The separation phenomenon occurred along the fracture surface in the lower rock strata, which slipped obliquely to coalface. The rock beneath the bottom of the lower igneous rock layer was compressed due to periodic weighting of the overlying rock strata before the working face reached the monitoring borehole. The ground deformation gradually accumulated during the whole mining process. These results indicate that the BOTDR-based monitoring method is effective for capturing strata deformation induced by underground mining, and may open up new avenues for ensuring safe and efficient coal mining activities.

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“…About bridge structures recently the applications and the validation of distributed strain sensor during load test has been demonstrated (Matta 2008, Minardo 2011. Other examples are the installation of a distributed fiber optic strain sensing cable into the inspection gallery of a dam Glisic 2005, Glisic andInaudi, 2007) or the monitoring of extra-long tunnel, running over 150 km of seafloor geologic body with complicated topographic and geologic units (Shi, 2003). However, the use of distributed fiber optic sensors for crack detection in concrete are rare.…”

Section: Distributed Fiber Optic Sensorsmentioning

confidence: 99%

Electromagnetic Sensing Techniques for Non-Destructive Diagnosis of Civil Engineering Structures

Bavusi¹,

Bernini²,

Lapenna³

et al. 2012

Earthquake-Resistant Structures - Design, Assessment and Rehabilitation

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A Feasibility Study on the Application of Fiber-Optic Distributed Sensors for Strain Measurement in the Taiwan Strait Tunnel Project

Cited by 53 publications

References 0 publications

Observation of Static Load of L-Shaped Retaining Wall Constructed on Short Wooden Pile Using Fiber Optic Geogrid BOTDR Method

Observation of Static Load of L-Shaped Retaining Wall Constructed on Short Wooden Pile Using Fiber Optic Geogrid BOTDR Method

A field study on distributed fiber optic deformation monitoring of overlying strata during coal mining

Electromagnetic Sensing Techniques for Non-Destructive Diagnosis of Civil Engineering Structures

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