Method and system for monitoring and warning influence of landslide on pipeline

Abstract

The invention relates to a method and a system for monitoring and warning the influence of a landslide on a pipeline. The monitoring is divided into two parts including monitoring of thrust of the landslide on the pipeline and pipeline strain monitoring. The method for monitoring the thrust of the landslide on the pipeline comprises the steps of: using a packaged earth pressure cell fiber Bragg grating sensor (4) fixed on the pipeline (14) to measure the pressure, wherein a sensitive surface of the earth pressure cell fiber Bragg grating sensor (4) for sensing the pressure faces toward the sliding direction of the landslide (13), so the pressure measured by the earth pressure cell fiber Bragg grating sensor (4) is the front thrust of the landslide (13) on the pipeline. The method for monitoring pipeline strain comprises the steps of: uniformly arranging pipeline (14) monitoring sections on edges on two sides of the landslide (13) and the pipeline (14) at the central position of the landslide, wherein the interval of the monitoring sections is no more than 60m; and uniformly arranging three pipe strain fiber Bragg grating sensors (3) on each pipeline (14) monitoring section of the pipeline (14) to monitor the axial strain of the pipeline (14).

Description

Technical field [0001] The invention is a method and system for monitoring and warning the influence of landslides on pipelines based on optical fiber grating. It involves the technical field of measuring stress and piping system. Background technique [0002] Landslide refers to the phenomenon of overall movement of the rock and soil that constitutes the slope under the action of gravity and the shearing process on the lower weak surface. Landslide disaster is one of the main forms of geological disasters that cause loss of human life and property. Long-distance oil or gas pipelines can reach thousands of kilometers in transportation distance, and pass through many geological and geomorphological units, and often inevitably pass through areas with complex geological conditions, such as mountainous areas and frozen soil areas. Due to insufficient route selection or pipeline construction-induced landslides or earthquake-induced landslides, pipelines laid in mountainous areas may...

AI Technical Summary

Problems solved by technology

The usual method is to select the structure of the landslide control project as the carrier, which is generally used in the effect monitoring of the landslide control project; another method is to select other existing structures on the landslide body (such as the ladder from top to bottom) as the carrier. Deformed carrier, this method is highly operable, but it is difficult to quantitatively calculate the deformation of the monitoring results

[0008] These current monitoring methods are limited to independent monitoring of landslides (disaster-causing bodies) or pipelines (hazard-bearing bodies), and systematic joint monitoring of landslides and pipelines under their influence has not yet been carried out.

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