Remote Real-Time Monitoring and Early Warning of Pipeline Status under Landslide Conditions Based on Stress–Strain Analysis

Abstract

In the laying of long-distance pipelines, it is sometimes impossible to avoid one or more areas that are prone to frequent geological disasters, such as landslides. In the case of such a disaster, the buried pipeline is likely to undergo large displacement leading to plastic deformation, subsequent leakage, explosions, and other accidents that may result in its failure. In order to ensure the safety of pipeline transportation, in this work, a remote real-time system for monitoring the status of pipelines was designed on a cloud service platform to realize stress–strain analysis and to provide an early warning of pipeline damage after a landslide. The results of the stress–strain analysis of a pipeline buried under a landslide were used to establish a numerical calculation model based on the shell element and nonlinear soil springs. The deformation distribution characteristics of the pipeline, based on multiple factors, were studied, and the effects of the landslide width, buried depth, ultimate soil resistance, diameter thickness ratio, and internal pressure on vertical displacement, as well as the axial strain and bending strain of the pipeline were obtained. According to the results of the finite-element method, the plastic deformation position of the pipeline under the action of landslide was determined, the software and hardware configuration of the pipeline strain monitoring scheme was designed, and the installation of the pipeline strain monitoring system was carried out. The processing results of the field data showed that the model had a good noise reduction effect. Moreover, the results showed that the system achieved stable real-time data acquisition, efficient data remote transmission, convenient operation, and rich terminal monitoring capabilities, thus effectively providing an evaluation of the operating status of the pipeline, improving landslide disaster warning, and ensuring the safe operation of the pipeline. Buried pipelines are likely to undergo large displacement under the action of geological disasters such as landslides, which can lead to accidents such as pipeline leakage and explosion. In order to ensure the safety of pipeline transportation, a numerical calculation model of a buried pipeline based on shell elements and soil springs is established to analyze the stress and strain of a pipeline under a landslide. The model can reflect the deformation distribution characteristics of the pipeline and analyze the influence of landslide width, buried depth, and other factors on the deformation of the pipeline. Based on the presented method, the dangerous points of plastic deformation of pipeline under landslide can be determined. Furthermore, combined with the actual situation of a landslide site, a monitoring system has been designed and installed that can operate stably for a long time in the landslide disaster site. The system can realize the acquisition, transmission, and evaluation of pipeline data, and ensure the smooth operation of buried pipelines.