Latest Updates (PDF) Anchor test and long-term monitoring of grouted
Geotechnical monitoring of anchors provides fundamental data for analysis and evaluation to ensure safe environment. The use of optic fiber
Latest Updates A New Self-Sensing Fiber Optic Anchor to Monitor Bolt
This new self-sensing fiber optic anchor was first applied to an open TBM tunneling project in an inclined shaft in the Kekegai coal mine, and monitoring data indicate
Latest Updates Monitoring and correction of the stress in an anchor bolt based on
The axial stress and shear stress of the bolt are measured by the method of inserting the fiber optic sensor into the anchor rod. The measured value is higher than the actual value of the ungrooved
Latest Updates Experimental Study on Load-Transfer Mechanism of Rockbolts Using Fiber
It was found that: (1) the fiber optic data were able to perfectly reflect the complete decoupling mechanism of the bolt, which could not be observed in the strain gauge data; (2) the
Latest Updates Assessing the Difference in Measuring Bolt Stress: A Comparison of
The performance of the bolt under pull-out loading was measured using the pulse-pre-pump Brillouin optical time domain analysis (PPP-BOTDA) and fiber Bragg grating (FBG) sensing
Latest Updates Testing Mechanical Properties of Rock Bolt under
Fiber Bragg grating (FBG) sensors, which can accurately measure strain, can be integrated with rock bolts with small fingerprints. In this paper,
Latest Updates Stress Monitoring on GFRP Anchors Based on Fiber Bragg Grating
This study presents a field test to assess the feasibility of fiber Bragg grating (FBG) sensors in monitoring the stress profile of GFRP anchors during pulling test. Two GFRP anchors were fully
Latest Updates Experimental study of anchor bolt stress evaluation with hybrid optical
This paper utilizes FBG and BOTDA fiber optic sensing technologies, which are combined with traditional strain gauges to develop a hybrid fiber optic axial force sensing system for bolts.
Latest Updates Strain-Sensing Mechanism and Axial Stress Response
This paper proposes a new approach to detecting bolts'' anchoring qualities based on the fiber Bragg grating sensing principle. Moreover, it studies the strain transmission mechanism
Latest Updates Utilizing a novel fiber optic technology to capture the axial responses
Abstract Rock bolts are one of the primary support systems utilized in underground excavations within the civil and mining engineering industries. Rock bolts support the weakened rock
Latest Updates Augmenting the in-situ rock bolt pull test with distributed optical
Within this context, a technique using distributed optical fiber strain sensing (DOS) is presented as a sensing based methodology to augment the assessment of ground anchors/support
Latest Updates Stress Monitoring on GFRP Anchors Based on Fiber
Glass fiber-reinforced polymer (GFRP) bolts have been widely used in some applications of grouted anchors because of the advantages of better
Latest Updates Numerical Simulation of a Ground Anchor Pullout Test
This paper presents a comprehensive study of the load transfer mechanism of a soil anchor during pullout test. The anchor was monitored with fiber optic sensors installed along the
Latest Updates A New Self-Sensing Fiber Optic Anchor to Monitor Bolt
This paper presents a new self-sensing anchor with embedded optical fibers (made using an improved stirrer) and proposes an intelligent tunnel rock monitoring system.
Latest Updates Bolt axial force monitoring based on fiber grating technology
In order to verify the relationship between the stress of the bolt and the wavelength variation characteristics of the fiber grating, the calibration test of the fiber grating force measuring
Latest Updates Monitoring bolt load using an fiber optic sensor
Employing fiber optic sensors for torque control offers an advanced technical solution, leveraging the unique properties of optical transmission to
Latest Updates Advances in fibre-optic-based slope reinforcement monitoring: A review
Real-time monitoring of the mechanical performance of slope reinforcements such as rock bolts, soil nails, geosynthetics, and retaining walls using FO sensors offers an effective alternative for
Latest Updates Bolt axial force monitoring based on fiber grating technology
A novel fiber Bragg grating (FBG) sensor technology is proposed for use in mines, specifically designed to enhance the monitoring of anchor rods.
Latest Updates Application of fiber optical sensing technology to monitoring axial
The basic principle of fiber Bragg grating sensor is described. Through engineering application of fiber Bragg grating sensor to monitoring axial forces of anchor bolts for Longtan tunnel
Latest Updates Stress Monitoring on GFRP Anchors Based on Fiber
The procedure for embedding bare FBG sensors into GFRP bolts is introduced first. Then, the axial forces and shear stresses that were calculated
Latest Updates Utilizing a novel fiber optic technology to capture the axial responses
Rock bolts have been used for over 4 decades in mining and civil engineering applications as part of a reinforcing system within underground excavations due to their ease of installation,
Latest Updates Monitoring torque in bolts using an embedded fiber Bragg grating
Fiber Bragg grating (FBG) sensors are used in bolted joint monitoring because of their high precision, light weight, and low electromagnetic interference. Khomenko et al. performed
Latest Updates Stress Monitoring on GFRP Anchors Based on Fiber
To measure the stress profile along test anchors, seven bare FBG sensors were arranged in a single optical fiber and then embedded in the middle
Latest Updates Stress distribution monitoring of ground anchor using optical fiber
After setting a hydraulic jack, we remove the epoxy coating at the end of the strand and pull out the embedded optical fiber. Then, an optical connector is attached using a fusion splicer for connecting
Latest Updates Monitoring and correction of the stress in an anchor bolt
Bolt is an important connection in underground construction and monitoring its stress characteristics is essential to evaluate the effectiveness of
Latest Updates Experimental study of anchor bolt stress evaluation with hybrid optical
This work proposes a unique fiber optic temperature compensator and strain transmission coefficient analysis method to promote the evaluation quality of anchor bolt stress behaviors, which would
Latest Updates A load measuring anchor plate for rock bolt using fiber optic sensor
In this short communication, we propose a smart anchor plate, a simple but effective device that uses fiber Bragg gratings (FBG) type optic sensor, to monitor the load level of the rock bolt.