Evolution Mechanism of Rock Slope Slide Based on Fiber Optic Sensors

Wu, Chuansheng; Feng, Zhenyang; Han, Yafei; Zhang, Dongming; Wang, Yu

doi:10.1166/jno.2017.2221

Cited by 3 publications

(1 citation statement)

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“…With the development of optical fiber sensing technology [16], many scholars [17][18][19][20][21] began to apply it to the monitoring of slope engineering, and achieved some good results. Zhu et al [22] developed an innovative quasi-distributed optical fiber sensing network based on fiber Bragg grating (FBG) technology to monitor the strain distribution of soil nails, the underground displacement of slope and the internal strain of soil.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on joint sensing and early warning method of landslide disaster based on NPR-OFST

Tao,

feng,

Zhang

et al. 2024

Preprint

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In order to explore more effective methods of landslide disaster monitoring and controlling, NPR anchor cable and optical fiber grating strain sensor are physically combined to form a slope reinforcement-monitoring integration system, with PVC pipe an intermediary. Physical model test is carried out according to timely warning of landslide disasters of the Newtonian force monitoring system. At the same time, the optical fiber sensing technology has the condition of continuous perception of time and space. The feasibility of monitoring the whole life cycle of slope instability and positioning the potential sliding surface is discussed. Through the analysis of the test results, it is concluded that the fiber grating strain sensor can effectively monitor the deep displacement of the slope. PVC pipe and the soil have deformation coordination, which is able to effectively reinforce the slope body together with the combined anchor cable sensing device, and can continuously sense the potential sliding surface in the whole life cycle of the slope. By comparing the results of Newton force monitoring curve with the fiber grating strain monitoring, the mechanical law of “Newton force sudden drops, immediately catastrophe happens” is further verified. Finally, it is concluded that the combined sensing and early warning method of optical fiber sensing technology and Newton force monitoring can realize comprehensive monitoring and control of landslide disasters. This method realizes the further optimization of Newton force monitoring system.

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Section: Introductionmentioning

confidence: 99%

Experimental study on joint sensing and early warning method of landslide disaster based on NPR-OFST

Tao,

feng,

Zhang

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

Experimental study on joint sensing and early warning method of landslide disaster based on NPR-OFST

Tao,

Feng,

Zhang

et al. 2024

Geomech. Geophys. Geo-energ. Geo-resour.

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In order to explore more effective methods of landslide disaster monitoring and controlling, NPR anchor cable and optical fiber grating strain sensor are physically combined to form a slope reinforcement-monitoring integration system, with PVC pipe an intermediary. Physical model test is carried out according to timely warning of landslide disasters of the Newtonian force monitoring system. At the same time, the optical fiber sensing technology has the condition of continuous perception of time and space. The feasibility of monitoring the whole life cycle of slope instability and positioning the potential sliding surface is discussed. Through the analysis of the test results, it is concluded that the fiber grating strain sensor can effectively monitor the deep displacement of the slope. PVC pipe and the soil have deformation coordination, which is able to effectively reinforce the slope body together with the combined anchor cable sensing device, and can continuously sense the potential sliding surface in the whole life cycle of the slope. By comparing the results of Newton force monitoring curve with the fiber grating strain monitoring, the mechanical law of “Newton force sudden drops, immediately catastrophe happens” is further verified. The feasibility of the combined sensing and early warning method of optical fiber sensing technology and Newton force monitoring is verified. This method realizes the further optimization of Newton force monitoring system.

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Study on Evolutionary Characteristics of Toppling Deformation of Anti-Dip Bank Slope Based on Energy Field

et al. 2020

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The evolution of toppling deformation of anti-dip slope is essentially a process of energy dissipation and transformation. Aiming to study the characteristics of energy evolution in different stages, the DEM (discrete element method) software PFC (Particle Flow Code) was utilized to establish a two-dimensional numerical model for a bank slope in Chongqing based on geological background data and field investigation. The DEM model was proven to be reliable not only because the deformation discrepancy between the numerical model and actual bank slope was not large but also because some obvious fractures in the actual bank slope can readily be found in the numerical model as well. In this article, content about displacement in the shallow layer was analyzed briefly. Special effort was made to analyze the energy field and divide the toppling deformation process into three stages. (1) Shear deformation stage: this is an energy accumulating stage in which the strain energy, friction energy, and kinetic energy are all small and the deformation is mainly shear deformation in the slope toe. (2) Stage of main toppling fracture surface hole-through: all three kinds of energy present the increasing trend. The shear deformation in the slope toe expands further, and the toppling deformation also appears in the middle and rear parts of the bank slope. (3) Stage of secondary toppling and fracture surface development: strain energy and friction energy increase steadily but kinetic energy remains constant. Deformation consists mainly of secondary shearing and a fracture surface in the shallow layer. Secondary toppling and fracture surface develop densely.

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Evolution Mechanism of Rock Slope Slide Based on Fiber Optic Sensors

Cited by 3 publications

References 0 publications

Experimental study on joint sensing and early warning method of landslide disaster based on NPR-OFST

Experimental study on joint sensing and early warning method of landslide disaster based on NPR-OFST

Experimental study on joint sensing and early warning method of landslide disaster based on NPR-OFST

Study on Evolutionary Characteristics of Toppling Deformation of Anti-Dip Bank Slope Based on Energy Field

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