Online monitoring and safety research method for foundation settlement of buried natural gas pipeline

Abstract

The invention provides a buried natural gas pipeline foundation settlement online monitoring and safety research method. The method comprises the steps that a pipe-soil three-dimensional model is established, and settlement monitoring key points are determined; the signal transfer system transmits data acquired by the settlement measurement sensing system to a remote terminal server, so that long-term online settlement monitoring is realized; predicting the settlement condition of the next stage based on the prediction model and the B-P neural network model according to the actually measured big data of pipeline settlement; fourier series expansion is carried out on settlement data to obtain a pipeline harmonic settlement curve, the pipeline harmonic settlement curve serves as a loading condition to be input into the three-dimensional model, and the influence of current settlement on the pipeline structure is analyzed in combination with pipeline stress. At present, research on real-time on-line monitoring of pipeline settlement at home and abroad is less, the method has many advantages compared with manual field measurement, and managers can know the current situation of the pipeline, find abnormal states, take prevention measures in time and guarantee long-term safe operation of the pipeline.

Description

technical field [0001] The invention belongs to the technical field of safe operation monitoring and settlement prediction of buried natural gas pipelines, and particularly relates to a method for on-line monitoring and safety research of foundation settlement of buried natural gas pipelines. Background technique [0002] Natural gas is an important production energy. When the management or equipment maintenance is improper during transportation, there will be dangerous situations such as leakage, combustion and explosion. At the same time, it will also pollute the atmosphere and the environment, threaten the life safety of people, cause casualties and huge economic losses. For decades, pipelines have been regarded as the most economical and reasonable way to transport a large amount of natural gas, ranging from national strategic planning to small urban gas use, which reflects the important role of pipelines in natural gas transportation. However, the safety of natural gas ...

AI Technical Summary

Problems solved by technology

However, the traditional manual monitoring mainly has the following shortcomings: the cost of manual on-site measurement is high and the continuity of monitoring data is poor. It is necessary to arrange professionals to carry out monitoring on site at regular intervals (regularly), which increases the labor cost of personnel. When the interval period is too long It will lead to poor data continuity and cannot reflect the current status of the pipeline in time; the large amount of on-site measurement engineering will cause difficulties in data entry and processing, and it is difficult to avoid errors caused by human subjective factors; the operation time is long and the natural environment of the monitoring site is harsh, such as In case of dangerous situations such as pipeline rupture, gas leakage and explosion, which seriously threaten the safety of personnel

[0007] 3. The strain gauge is attached to the surface of the buried pipeline, that is, below the surface. During the backfilling stage or due to the later site movement, etc., the damage and failure of the strain gauge will inevitably be caused. Therefore, the accuracy of the stress measurement system cannot be guaranteed, nor can it be guaranteed Systematic Evaluation of the Reliability of Pipeline Risk Levels

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