Precaution and early warning of surface failure of slopes using tilt sensors

Uchimura, Taro; Towhata, Ikuo; Wang, Lin; Nishie, Shunsaku; Yamaguchi, Hiroshi; Seko, Ichiro; Qiao, Junfei

doi:10.1016/j.sandf.2015.09.010

Cited by 122 publications

(49 citation statements)

References 8 publications

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“…Signal and power cables inside the pipe are used to connect the electronics board to the main board on the ground. These segments are connected together to form a long column (Uchimura et al 2015).…”

Section: The Sensor Nodementioning

confidence: 99%

“…According to Kotta et al (2011), the vibration value on the X and Y axes of an acceleration sensor in a position on the ground above 0.5 g indicates a remarkable ground movement. Uchimura et al (2015) suggested that if a slope has a tilting rate of 0.010 per hour, a precaution should be issued. Therefore, in this project, we designed the Threshold_3 = 0.5 g (1 g = 9.8 m/s 2 ).…”

Section: Proposed Working Principle For the Instability Prediction Anmentioning

confidence: 99%

“…Among various methods for the landslide risk prevention, monitoring and early warning systems are considered to be one of the most promising ways (Uchimura et al 2015). Literature review shows that various monitoring and early warning systems for rainfall-induced landslides have been successfully proposed, from national to site-specific scale with different time spans i.e.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design and implementation of site-specific rainfall-induced landslide early warning and monitoring system: a case study at Nam Dan landslide (Vietnam)

Anh

Tran²,

Nguyen³

et al. 2017

Geomatics, Natural Hazards and Risk

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This paper proposes and implements an early warning and monitoring system for rainfall-induced landslide (named as EWM RIL) with a case study at the Nam Dan landslide (northern Vietnam). The proposed system consists of six sensor nodes and one rainfall station that are used to sense large amounts of data in real-time such as soil moisture, pore-water pressure (PWP), movement status, and rainfall. In addition, a new flexible configuration for the wireless communication system is proposed that is capable not only to save the energy consuming but also to ensure the reliability of the system. Using wireless communication system, the sensed data were sent to the computer station for analyzing and predicting the instability of the landslide in terms of factor of safety (FoS) using the finite element seepage analysis and the limit equilibrium slope stability analysis methods. These methods are available in the SEEP/W and SLOPE/W modules of the GeoStudio software. Based on the analyzing results, the system proposed three warning levels for the landslide Early, Intermediate, and Imminent. Experiment result in the rainy season from August to September 2016 has proven the validity of the EWM RIL system. The result of this study is useful for landslide risk prevention and management in landslide prone-areas.

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Section: The Sensor Nodementioning

confidence: 99%

Section: Proposed Working Principle For the Instability Prediction Anmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design and implementation of site-specific rainfall-induced landslide early warning and monitoring system: a case study at Nam Dan landslide (Vietnam)

Anh

Tran²,

Nguyen³

et al. 2017

Geomatics, Natural Hazards and Risk

View full text Add to dashboard Cite

show abstract

“…Deformation monitoring of the slope is very significant to knowing a slope's status and trend and carrying out evaluation and geological disaster warning [3]. Traditional slope monitoring technologies often use electromagnetic sensors [4] and acquisition instruments [5], where an electrical signal is highly susceptible to electromagnetic interference [6] and cannot be transmitted over a long distance.…”

Section: Introductionmentioning

confidence: 99%

A High Precision Fiber Bragg Grating Inclination Sensor for Slope Monitoring

Zhao

et al. 2019

Journal of Sensors

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A high precision and small size Fiber Bragg Grating (FBG) inclination sensor which is used for slope monitoring is proposed in this paper. The FBG inclination sensor has a pendulum structure for high precision and a circular body for easy installation in the common inclinometer pipe. The sensitivity of the FBG inclination sensor can reach 400 pm/deg by optimizing its parameters. The test results show the superior performance of this FBG inclination sensor in terms of static characteristics, and its sensitivity is 406.6 pm/deg. The comparison experiment shows the static characteristics of the FBG inclination sensor are better than the traditional electrical inclination sensor.

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“…Thus, the system is low-cost and simple so that the residents in risk areas can handle it to protect themselves from slope disasters. Uchimura et. al.…”

Section: Introductionmentioning

confidence: 99%

Multi-point monitoring of unstable slope with low cost sensor network

Uchimura

Wang²,

Yamaguchi³

et al. 2015

JGS Special Publication

Self Cite

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A low-cost and simple monitoring method for early warning of rainfall-induced landslides has been proposed by the authors. Tilting angles in the surface layer of slope are mainly monitored in this method. A set of equipment has been developed for practical use, which is equipped with a MEMS (Micro Electro Mechanical Systems) tilt sensor and a volumetric water content sensor. In several case studies with this system, including a slope failure test conducted on a natural slope by applying artificial heavy rainfall, it detected distinct behaviors in the tilting angles in the pre-failure stages. Considering these behaviors, the authors has proposed to issue precaution at a tilting rate of 0.01 degrees per hour, and warning at that of 0.1 degree per hour, for conservative decision. The development of this system reduced the cost for slope monitoring reasonably. However, the number of available equipment for each slope is still limited due to financial restriction, and therefore, engineers need to select the position of sensors carefully for effective early warning. This paper introduce authors' recent attempt to develop more low-cost sensor network for slope monitoring. The cost for each sensor node was reduced by around one-third, and consequently, slopes can be monitored at many point, resulting in more meticulous observation of slope behaviors.

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Precaution and early warning of surface failure of slopes using tilt sensors

Cited by 122 publications

References 8 publications

Design and implementation of site-specific rainfall-induced landslide early warning and monitoring system: a case study at Nam Dan landslide (Vietnam)

Design and implementation of site-specific rainfall-induced landslide early warning and monitoring system: a case study at Nam Dan landslide (Vietnam)

A High Precision Fiber Bragg Grating Inclination Sensor for Slope Monitoring

Multi-point monitoring of unstable slope with low cost sensor network

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