Pipeline deformation distributed monitoring device and method based on transparent soil

Abstract

The invention discloses a pipeline deformation distributed monitoring device and monitoring method based on transparent soil. The monitoring device comprises an optical experiment platform, a model box, a pipeline model, a pressurizing device, a distributed sensing optical cable, an OFDR demodulator, a CCD camera, a laser, a linear converter, a displacement platform, an electric control device, adial indicator, a soil humidity tester and a computer. By simulating actual working conditions of an empty pipeline and a flood season pipeline at different depths under a static water or dynamic load, deformation, damage and soil humidity change of a water conveying pipeline under the action of soil pressure are recorded and observed; distributed sensing optical cables are arranged along a pipeline, and strain changes in the pipeline deformation process are obtained in real time; the transparent soil surface stress is acquired through a dial indicator; a certain section image shot by a CCD camera is analyzed and processed through PIV, a two-dimensional deformation field of the section is obtained, the position of the section is changed through a displacement platform, and then a three-dimensional deformation field of pipe soil in the whole test device is obtained.

Description

technical field [0001] The invention relates to an optical fiber monitoring device for pipeline deformation, in particular to a distributed monitoring device and monitoring method for pipeline deformation based on transparent soil. Background technique [0002] Pipelines are the underground lifeline for the safe operation and development of cities. Now more and more managers are beginning to pay attention to and strengthen the management of basic facilities such as underground pipe networks. OFDR technology is a distributed monitoring technology that uses sweeping light source coherent detection technology to detect optical signals in optical fibers. Since it is not limited by the contradiction between spatial resolution and dynamic range, it has a large dynamic range and high test sensitivity. It has incomparable advantages in short-distance monitoring, which makes it popular in the field of monitoring, and solves the problem of missing strain curves caused by insufficient ...

AI Technical Summary

Problems solved by technology

[0003] The measurement of the internal deformation of the soil has always been a difficult point in the study of soil mechanics, while the traditional indoor model test measurement can only obtain the macroscopic deformation of the soil and the deformation of the boundary area

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