Abstract
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.
Highlights
Introduction published maps and institutional affilLandslide hazard is the most common geological hazard in nature and causes billions of dollars of damage every year worldwide
To deeply study the evolution process of landslide and master its motion law, significantly reduce or prevent the loss caused by landslide hazard and timely ensure the safety of people’s lives and property, precise and continuous monitoring of landslide-prone areas is required [2]
It can be seen that the maximum errors of horizontal displacement and vertical displacement solved by this measurement model will not exceed 1 mm, and most of the errors are within 0.5 mm, verifying the measurement accuracy and reliability for our proposed underground displacement three-dimensional measuring model, and the rationality and efficiency for our proposed underground displacement three-dimensional measurement method
Summary
Landslide hazard is the most common geological hazard in nature and causes billions of dollars of damage every year worldwide. China is one of the countries most seriously affected by landslide hazards in the world [1]. According to the statistics of the Ministry of Natural Resources of the People’s Republic of China, the number of landslide hazards and the caused losses each year in China are the highest among all geological hazards, seriously threatening public health and safety. To deeply study the evolution process of landslide and master its motion law, significantly reduce or prevent the loss caused by landslide hazard and timely ensure the safety of people’s lives and property, precise and continuous monitoring of landslide-prone areas is required [2]. Displacement is the most direct state quantity reflecting landslides, so that monitoring iations
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