Method and system for monitoring and warning pipeline landslide and method for constructing system

Abstract

The invention relates to a method and a system for monitoring and warning a pipeline landslide based on a fiber Bragg grating and a method for constructing the system. The monitoring is performed on four parts including landslide depth displacement, landslide surface displacement, thrust of landslide on a pipeline and pipeline strain, and comprises the steps of: firstly, inserting an inclinometerpipe (1) pasted with a fiber Bragg grating sensor from the landslide (13) to all potential sliding surfaces (15); secondly, embedding a slender concrete ground beam (2) of which two ends are fixedly restrained and the axial direction of a central reinforced bar (17) is stuck to a ground beam fiber Bragg grating sensor (20) in a direction vertical to the deformation direction of the landslide (13)below the surface of the landslide (13); thirdly, measuring the thrust of the landslide (13) on the pipeline by using an earth pressure cell fiber Bragg grating sensor (4) fixed on the pipeline (14);and fourthly, arranging monitoring sections on edges on two sides and the pipeline (14) in the center of the landslide (13), and uniformly arranging three pipe strain fiber Bragg grating sensors (3) on each monitoring section to monitor the axial strain of the pipeline (14).

Description

technical field [0001] The invention relates to a pipeline landslide monitoring and early warning method, system and system construction method based on optical fiber gratings. The invention relates to the technical field of stress measurement, temperature measurement and pipeline system. Background technique [0002] Landslide refers to the overall movement of the rock and soil mass forming the slope under the action of gravity along with the shearing process on the weak surface of the lower part. 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 have a transportation distance of thousands of kilometers, crossing many geological and geomorphic units, and often inevitably pass through areas with complex geological conditions, such as mountainous areas and permafrost areas. Due to insufficient line selection or landslides induced by pipeline construction or earthquakes, pipeline...

AI Technical Summary

Problems solved by technology

[0007] 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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