Method and device for predicting bottom scouring depth of underwater crossing pipeline

Abstract

The invention provides a method and device for predicting the bottom scouring depth of an underwater crossing pipeline, and belongs to the technical field of underwater crossing pipelines. According to the technical scheme provided by the embodiment of the invention, the corresponding limit equilibrium scouring depth and the duration of reaching the scouring equilibrium state are obtained based on the various characteristic parameters of the first crossing pipeline which is scoured in the river; and the data are obtained based on the actual scouring data, so that the reliability is relatively high, and the accuracy is high. According to the data, the scouring time and the scouring depth of the first crossing pipeline and the first-level kinetic reaction equation, a scouring pit vertical expansion mathematical model of the crossing pipeline in the river can be obtained, and the model can reflect the rule that the scouring pit depth changes along with the scouring time. Based on the mathematical model, the scouring depth of the to-be-predicted second crossing pipeline at any preset scouring time can be obtained, so that a riverbed can be reinforced in time, and the safety and reliability of the underwater crossing pipeline are improved.

Description

technical field [0001] The present application relates to the technical field of underwater crossing pipelines, in particular to a method and device for predicting scour depth at the bottom of underwater crossing pipelines. Background technique [0002] As the fifth largest transportation industry after highway, railway, water transportation and air transportation, pipeline transportation plays a huge role in water, electricity, gas, oil and other fields. In the construction of long-distance oil and gas pipelines, some mountains, rivers and oceans will inevitably pass through. The pipeline underwater crossing technology has been widely used in actual construction due to its short construction period, low construction difficulty, and ability to save investment. [0003] During the long-term use of underwater pipelines, due to factors such as river bed evolution, rainstorms and floods, buried pipelines are exposed or partially suspended, and pipelines are prone to fatigue dama...

AI Technical Summary

Problems solved by technology

[0003] During the long-term use of underwater pipelines, due to factors such as river bed evolution, rainstorms and floods, buried pipelines are exposed or partially suspended, and pipelines are prone to fatigue damage under complex hydrodynamic conditions such as waves and currents. Even break, bring serious hidden danger to the safe operation of the pipeline

Once the underwater crossing pipeline is washed out and suspended, it will not only cause huge property losses, but also the oil and gas leakage caused by the pipeline damage will aggravate the pollution of the surrounding rivers, posing a huge threat to the lives of residents along the line

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