Method for predicting impact force of submarine landslide collapse block on submarine pipeline

A technology of submarine pipeline and prediction method, applied in the field of marine engineering, can solve the problems of pipeline damage, there is no reliable theoretical basis, and the prediction method of the impact force of submarine pipeline has not yet been seen, so as to achieve the effect of ensuring safe operation and improving safety design.

Active Publication Date: 2021-04-30
FUJIAN UNIV OF TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the high strength of the collapse block, it will cause impact force on the submarine pipeline during the slide process. If the impact force is too large, it will easily cause pipeline damage
So far, there is no reliable theoretical basis for predicting the impact force of collapse blocks on submarine pipelines.

Method used

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  • Method for predicting impact force of submarine landslide collapse block on submarine pipeline
  • Method for predicting impact force of submarine landslide collapse block on submarine pipeline
  • Method for predicting impact force of submarine landslide collapse block on submarine pipeline

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with embodiment.

[0049] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0050] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0051] This embo...

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Abstract

The invention relates to a method for predicting the impact force of a submarine landslide collapse block on a submarine pipeline, and the method comprises the steps: the cohesive force and internal friction angle of a soft soil body are gradually reduced below a hard layer under the action of a wave cyclic load to a critical value, the submarine landslides, the hard layer slides downwards and is torn into a collapse block, and slides towards the downside of a slope; firstly, the bottommost collapse block impacts the submarine pipeline, the instant impact force of the collapse block impacting the submarine pipeline is determined according to the momentum theorem, after the impact force is completed, the collapse block acts on the submarine pipeline in a static thrust mode, then the second row of collapse blocks impact the first row of collapse blocks, and the impact force acts on the submarine pipeline; and after the impact force is finished, the first row of collapsed blocks and the second row of collapsed blocks act on the submarine pipeline in a static thrust mode until the last row of collapsed blocks impact the submarine pipeline, and force in two modes of instant impact force and static thrust acts on the submarine pipeline.

Description

technical field [0001] The invention relates to the field of ocean engineering, in particular to a method for predicting the impact force of a submarine landslide block on a submarine pipeline. Background technique [0002] The seabed in the Bohai Bay region of my country has a hard layer with a small thickness, and a soft substratum with low strength exists under the hard layer. Under extreme sea conditions, waves are likely to cause liquefaction of the soft substratum soil. The upper hard layer is not easy to liquefy due to its high density and high strength, and the hard layer slides down along the underlying liquefied layer, tearing and becoming a collapsed block. Due to the high strength of the collapse block, it will cause an impact force on the submarine pipeline during the sliding process. If the impact force is too large, it will easily cause damage to the pipeline. So far, there is no method for predicting the impact force of collapse blocks on submarine pipelines...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06F30/20G01L5/00G06F119/14
CPCG06Q10/04G06F30/20G01L5/0052G06F2119/14
Inventor 罗才松王枫轩付朝江高颖詹金武陈华艳乔惠云王启云
Owner FUJIAN UNIV OF TECH
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