Development of slope deformation monitoring system based on tilt sensors with low-power wide area network technology and its application

Development of slope deformation monitoring system based on tilt sensors with low-power wide area network technology and its application

A simple monitoring method for observing slope movement and deformation can be performed with tilt sensors. A more efficient monitoring method, using a type of wireless communication called LPWA (low-power wide area) network technology, has also recently become available. In the present study, a mon...

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Bibliographic Details
Published in:Journal of civil structural health monitoring Vol. 11; no. 4; pp. 1037 - 1053
Main Authors: Putra, Aulia Dharma, Toda, Hikaru, Hafidz, Achmad, Matsuba, Kouji, Kimikado, Yuuichi, Takahashi, Yoshinori, Tsuzuki, Shinji, Kinoshita, Naoki, Yasuhara, Hideaki
Format: Journal Article
Language:English
Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-09-2021
Springer Nature B.V
Subjects:
Civil Engineering
Computer networks
Control
Dynamical Systems
Engineering
Failure analysis
Gateways
Groundwater levels
Measurement Science and Instrumentation
Monitoring
Monitoring systems
Original Paper
Power management
Radio waves
Rainfall
Sensors
Shear strength
Vibration
Wave propagation
Wide area networks
Wireless communications
Wireless networks
Rainfall
Slope failure
Tilt sensor
LPWA (low-power wide area)
Slope monitoring
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Summary:A simple monitoring method for observing slope movement and deformation can be performed with tilt sensors. A more efficient monitoring method, using a type of wireless communication called LPWA (low-power wide area) network technology, has also recently become available. In the present study, a monitoring system was developed that combines tilt sensors and LPWA network technology for measuring the movement of slopes and sending the information through wireless communication. First, radio wave propagation experiments were conducted to find the proper location for the gateway device of the monitoring system. Then, in March 2018, the developed system that consists of tilt and water-level sensors and the wireless communication of LPWA was installed at an observation site. Since the installation, the data from the tilt sensors have been successfully collected through LPWA, and a slope failure was unexpectedly observed at the observation site during the Heavy Rain Event of July 2018, which caused severe disasters, particularly from western Japan to the Tokai region. Using the data from the tilt sensors, the rainfall data, and the groundwater level, the slope failure was analysed. A site investigation was conducted, and the shear strength parameter was examined using back analysis method. In conclusion, the developed system using sensors and LPWA has continued to efficiently monitor the movement of the targeted slope, but the collection of additional data will be required to increase the reliability of the system.
ISSN:2190-5452
2190-5479
DOI:10.1007/s13349-021-00494-9