Stability monitoring of surrounding rock mass on a forked tunnel using both strain gauges and FBG sensors

Li, Yong; Wang, Hanpeng; Cai, Wenjie; Li, Shucai; Zhang, Qiangyong

doi:10.1016/j.measurement.2019.107449

Cited by 30 publications

(19 citation statements)

References 32 publications

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“…Pylon strain gauges were installed before the mounting of cheek boards in the place where they are jointed with the base plate. Before being cased each device was fixed with wires to the reinforcement in an intended orientation [8][9][10][11][12][13][14][15].…”

Section: Methodsmentioning

confidence: 99%

Monitoring of the framings stress-strain with strain gauges

Yurgaytis

Topchiy

Shinkarenko³

et al. 2020

E3S Web Conf.

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The article describes the research methods of the stress-strain of reinforced concrete framings (piles and pylons) using embedded strain gauges. The relations of load to indirect reactive characteristics displayed by the weighing device which were obtained through laboratory tests of framings reference specimens are given. Summary tables of framings stress-strain monitoring results gained during the II Phase of construction project (after base plate concreting for piles and floor slab concreting for pylons) are included. The study of obtained results of actual framings stress will allow reducing construction material consumption through the reduction of the safety factors on reliability.

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Section: Methodsmentioning

confidence: 99%

Monitoring of the framings stress-strain with strain gauges

Yurgaytis

Topchiy

Shinkarenko³

et al. 2020

E3S Web Conf.

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“…Hammah et al [15][16][17][18][19] presented separately different data analysis methods for optimized and determined dominant orientations, which promoted the progress of statistical method of joint. ree-dimensional modelling and analysis numerical methods have been developed with the computer-aided technology in the past two decades [20][21][22]. Xi et al [23] investigated the initiation and propagation of precracks in rock.…”

Section: Introductionmentioning

confidence: 99%

Investigating the Failure Mechanism of Jointed Rock Slopes Based on Discrete Element Method

Peng

Guo

Yan

et al. 2020

Advances in Civil Engineering

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This paper presents a comprehensive engineering method to investigate the failure mechanism of the jointed rock slopes. The field geology survey is first carried out to obtain the slope joint data. A joint network model considering the structural complexity of rock mass is generated in the PFC software. The synthetic rock mass (SRM) approach for simulating the mechanical behavior of jointed rock mass is employed, in which the flat-jointed bonded-particle model (FJM) and smooth joint contact model (SJM) represent intact rock and joints, respectively. Subsequently, the effect of microparameters on macromechanical properties of rock is investigated for parameter calibration. Moreover, the scale effect is analyzed by multiscale numerical tests, and the representative elementary volume (REV) size in the selected research area is found as 16 m × 16 m × 16 m. The microparameters of the SRM model are calibrated to match the mechanical properties of the engineering rock mass. Finally, an engineering case from Shuichang open-pit mine is analyzed and the failure process of the slope during the excavation process from micro- to macroscale is obtained. It has been found that failure occurs at the bottom of the slope and gradually develops upwards. The overall failure of the slope is dominated by the shallow local tension fracture and wedge failure.

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“…Computational simulations of rock fracture have been an active research field, which enhanced the understanding of failure mechanism of rock [16][17][18][20][21][22][23][24][25][26][27][28][29][30]. Fakhimi et al [2] employed a bonded particle model to investigate the fracture process of rock beam with a center notch and found that a cohesionless crack can develop at peak load.…”

Section: Introductionmentioning

confidence: 99%

Modelling the Crack Initiation and Propagation of Notched Rock Beam under the Three‐Point Bending Load

Guo

et al. 2020

Advances in Civil Engineering

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Prediction of rock fracture is essential to understand the rock failure mechanism. The three-point bending test has been one of the most popular experiments for the determination of rock fracture parameters. However, the crack initiation and propagation of rock beam with the center notch and offset notch have not been fully understood. This paper develops a numerical method for modelling the notched beam cracking based on nonlocal extended finite element method (i.e., XFEM) and mixed mode rock fracture model. An example is worked out to demonstrate the application of the numerical method and verified with experimental results. The crack length development, crack pattern, crack opening and slipping displacements, and the load-crack mouth of displacement (P-CMOD) curve are obtained. The effects of offset notch location and mechanical properties on the crack length development, P-CMOD curve, and crack pattern are investigated and discussed. It has been found that the peak load of the notched beam nearly linearly increases with the increase of the notch offset ratio. The cracking of rock beam with offset notch is dominated by mode I fracture, but mode II fracture contributes more when crack deflection occurs. The fracture energy significantly affects the peak load, while it has little effect on the prepeak and postpeak slopes in the P-CMOD curve.

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Stability monitoring of surrounding rock mass on a forked tunnel using both strain gauges and FBG sensors

Cited by 30 publications

References 32 publications

Monitoring of the framings stress-strain with strain gauges

Monitoring of the framings stress-strain with strain gauges

Investigating the Failure Mechanism of Jointed Rock Slopes Based on Discrete Element Method

Modelling the Crack Initiation and Propagation of Notched Rock Beam under the Three‐Point Bending Load

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