Application of FBG Sensing Technology in Stability Analysis of Geogrid-Reinforced Slope

Sun, Yunxiang; Xu, Hongzhong; Ping, Gu; Hu, Wenjie

doi:10.20944/preprints201703.0097.v1

Cited by 10 publications

(5 citation statements)

References 10 publications

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“…The combination of FOSs and geogrids for the strengthening of geotechnical structures e.g., [ 91 , 92 , 93 ] or FOSs and reinforcing composite patches based on either fiber reinforced plastics (FRPs) [ 94 ] or Fiber Reinforced Cementitious Matrix (FRCM) [ 95 ], for the rehabilitation of concrete structures, have been already explored in the literature. However, the integration of optical fiber sensors in TRC is still in the early stages of development, and thus, there is no sufficient literature available to compare their performance, structurally or in terms of efficiency and economy.…”

Section: Functionalizing Textile-based Reinforcement Structure With Fossmentioning

confidence: 99%

Fiber Optic Sensors Embedded in Textile-Reinforced Concrete for Smart Structural Health Monitoring: A Review

Alwis

Bremer

Roth

2021

Sensors

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The last decade has seen rapid developments in the areas of carbon fiber technology, additive manufacturing technology, sensor engineering, i.e., wearables, and new structural reinforcement techniques. These developments, although from different areas, have collectively paved way for concrete structures with non-corrosive reinforcement and in-built sensors. Therefore, the purpose of this effort is to bridge the gap between civil engineering and sensor engineering communities through an overview on the up-to-date technological advances in both sectors, with a special focus on textile reinforced concrete embedded with fiber optic sensors. The introduction section highlights the importance of reducing the carbon footprint resulting from the building industry and how this could be effectively achieved by the use of state-of-the-art reinforcement techniques. Added to these benefits would be the implementations on infrastructure monitoring for the safe operation of structures through their entire lifespan by utilizing sensors, specifically, fiber optic sensors. The paper presents an extensive description on fiber optic sensor engineering that enables the incorporation of sensors into the reinforcement mechanism of a structure at its manufacturing stage, enabling effective monitoring and a wider range of capabilities when compared to conventional means of structural health monitoring. In future, these developments, when combined with artificial intelligence concepts, will lead to distributed sensor networks for smart monitoring applications, particularly enabling such distributed networks to be implemented/embedded at their manufacturing stage.

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Section: Functionalizing Textile-based Reinforcement Structure With Fossmentioning

confidence: 99%

Fiber Optic Sensors Embedded in Textile-Reinforced Concrete for Smart Structural Health Monitoring: A Review

Alwis

Bremer

Roth

2021

Sensors

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“…FBG sensing technology is mainly used to reflect external deformation information by detecting changes in the central wavelength of the sensor, which can be used to measure temperature, strain, displacement and pressure [34,35]. The bare FBG sensor is fragile and usually needs to be fixed on a specific carrier [36][37][38]. Wang et al [4] proposed a detection device combining FBG and PVC pipe, Xu et al [39] proposed a soft FBG strain sensor composed of rubber strip, FBG, and steel plate.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Measuring Device and Method of Underground Displacement Based on Double Mutual Inductance Voltage Contour Method

Shentu

Wang

et al. 2022

Sensors

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Landslide is a very common and destructive geo-hazard, and displacement monitoring of it is integral for risk assessment and engineering prevention. Given the shortcomings of current landslide displacement monitor technologies, a new three-dimensional underground displacement monitoring technology is proposed based on the double mutual inductance voltage contour method. The underground displacement measuring device mainly consists of an information processing unit and sensing array, connected by power and RS-485 communication lines. An underground displacement measurement model to convert the double mutual inductance voltages and the inter-axis angle into the relative displacement between adjacent sensing units is established based on the interval-interpolation and contour-modeling. Under the control of the information processing unit, the relative displacement between any two adjacent sensing units can be calculated through the underground displacement measurement model, so as to obtain the total displacement from underground depth to surface, and the measurement data can be further sent to the Internet of things cloud platform through the 4G module; thus the remote real-time monitoring of underground displacement three-dimensional measurement for the rock and soil mass from underground depth to the surface is realized. The measurement model is verified by building an experimental platform to simulate the underground displacement of rock and soil mass. The experimental results show that for each measuring unit, when the horizontal displacement and vertical displacement are within the measurement range of 0–50 mm, the maximum measurement error will not exceed 1 mm, which can meet the accuracy requirements of underground displacement monitoring of landslide.

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“…Among them, numerical simulation technology can intuitively analyze the failure mechanism inside the rock and soil and is widely used in slope stability analysis. For example, Sun et al used the finite element software Midas-GTS to simulate the performance of reinforced soil slopes, and they compared the numerical simulation results with monitoring data to verify that numerical simulation techniques can reliably analyze geogridreinforced slopes [4,5]. Zhang et al took the actual engineering of geogrid reinforcement of the slope as an example, analyzed the stability of the slope, and optimized the geogrid reinforcement scheme [6,7].…”

Section: Introductionmentioning

confidence: 99%

Study on the Stability of Slopes Reinforced by Composite Vegetation Combined with a Geogrid under Rainfall Conditions

Yong

Tao

2021

Advances in Civil Engineering

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The planting of shrubs and trees on geogrid-reinforced slopes is an important ecological slope protection method that is frequently implemented in the rainy areas of southern China. First, this paper analyzes the soil-fixing principle of the geogrid and root system and demonstrates the feasibility of using composite vegetation of shrubs and trees to reinforce the slope with a geogrid. Using the Yushi Expressway project in Guizhou, we conducted a stability analysis of slopes under different working conditions and different reinforcement modes. We determined that the ecological protection method of combining composite vegetation with a geogrid can effectively increase the stability of slopes. The maximum displacement of the ecological slope under rainfall conditions was reduced by 82% compared with the original slope, and the overall stability was improved by 35%. Four factors affect the slope stability: the depth of shrub reinforcement, depth of anchorage of trees, distribution of trees, and spacing of the geogrids. An orthogonal analysis considering these 4 factors with 3 levels was implemented. The following optimal combination was obtained to ensure ecological protection under rainfall conditions: a shrub reinforcement depth of 0.6 m, a tree anchorage depth of 3 m, a grid spacing of 0.4 m, and a top-sparse and bottom-dense tree distribution. The combined slope protection schematic was applied to the Yushi Expressway project in Guizhou, and a strong reinforced slope protection effect was observed.

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Application of FBG Sensing Technology in Stability Analysis of Geogrid-Reinforced Slope

Cited by 10 publications

References 10 publications

Fiber Optic Sensors Embedded in Textile-Reinforced Concrete for Smart Structural Health Monitoring: A Review

Fiber Optic Sensors Embedded in Textile-Reinforced Concrete for Smart Structural Health Monitoring: A Review

Three-Dimensional Measuring Device and Method of Underground Displacement Based on Double Mutual Inductance Voltage Contour Method

Study on the Stability of Slopes Reinforced by Composite Vegetation Combined with a Geogrid under Rainfall Conditions

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