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Method and device for simulating axial interaction between submarine piping structure and seabed soil

A seabed soil and axial technology, applied in the fields of submarine pipeline engineering, marine soil mechanics, and offshore oil and gas engineering, can solve the problem of insufficient dissipation of pore water pressure, reduce the anti-skid ability of pipelines, and reduce the effective contact stress between pipelines and soil particles, etc. problem, achieve the effect of avoiding interference and reducing interference

Inactive Publication Date: 2016-08-17
INST OF MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

For the seabed with low permeability coefficient, when the pipeline moves rapidly in the axial direction, the generated pore water pressure will not be dissipated, which will reduce the effective contact stress between the pipeline and the soil particles, thereby reducing the anti-skid ability of the pipeline

Method used

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  • Method and device for simulating axial interaction between submarine piping structure and seabed soil
  • Method and device for simulating axial interaction between submarine piping structure and seabed soil
  • Method and device for simulating axial interaction between submarine piping structure and seabed soil

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Embodiment Construction

[0030] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0031] refer to Figure 1-7 , the method for simulating the axial interaction between the subsea piping system structure and the seabed soil in this embodiment includes the following steps: (1) using separate traction pipe heads 31 and pipe test sections 32 to movably splice model pipes 3 , Weight the model pipe 3 as required, then install a tension sensor 5 to measure its axial sliding resistance in the model pipe 3, and fix waterproof sandpaper with required roughness on the surface of the model pipe 3; (2) on the transparent or side wall A simulated seabed 2 is manufactured in a water tank 1 with an observation window; (3) A guide and restraint device 4 is installed on the m...

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Abstract

The invention discloses a method and device for simulating axial interaction between an undersea pipe system structure and a seabed soil body. The method includes the following steps that a model pipeline is selected, counterweight is conducted on the model pipeline according to the requirement, and then a tension sensor for measuring axial sliding resistance of the model pipeline is installed in the model pipeline; a water tank is selected, and a simulated seabed with the needed slope is manufactured in the water tank; a guide restraint device is installed on the model pipeline, the model pipeline is made to horizontally move only in the axial direction of the model pipeline and the direction perpendicular to the bed surface of the simulated seabed, meanwhile a displacement measurement device for measuring displacement of the model pipeline in the axial direction of the model pipeline and the direction perpendicular to the bed surface of the simulated seabed is installed on the guide restraint device, and the model pipeline is arranged on the simulated seabed; axial loading is conducted on the model pipeline, the model pipeline is made to axially slide, and meanwhile a data synchronous acquisition system is used for synchronously acquiring measurement data. An ideal means is provided for research on axial interaction between an undersea pipeline and the seabed.

Description

technical field [0001] The invention relates to technical fields such as marine oil and gas engineering, marine soil mechanics, and submarine pipeline engineering, and in particular to a method and a device for simulating the axial interaction between a submarine piping structure and seabed soil. Background technique [0002] Piping structures such as submarine pipelines and submarine optical cables have been widely used in offshore oil and gas transportation and communication signal transmission. How to ensure the in-situ stability of the submarine piping structure is a key issue in offshore engineering design and safe operation. For submarine pipelines laid on the horizontal seabed, the lateral and vertical pipe-soil interactions are the main connotation of the in-situ stability of the pipeline, and more systematic and in-depth studies have been carried out internationally. However, the topography of the seabed is complex and changeable, and the seabed of the continental ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M99/00
Inventor 高福平汪宁胡存臧志鹏
Owner INST OF MECHANICS CHINESE ACAD OF SCI
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