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Self-elevating offshore platform-based pile penetration quality dynamic-evaluation method

An offshore platform, dynamic assessment technology, applied in the test of infrastructure, infrastructure engineering, construction and other directions, can solve the problem of uncertainty in the quality of pile insertion, and achieve the effect of improving platform operation efficiency, ensuring safety, and improving safety.

Active Publication Date: 2014-02-05
东营市胜软石油技术开发有限公司
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Problems solved by technology

The process of pile insertion is often based on experience, and the quality of pile insertion is usually uncertain

Method used

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  • Self-elevating offshore platform-based pile penetration quality dynamic-evaluation method
  • Self-elevating offshore platform-based pile penetration quality dynamic-evaluation method

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Embodiment Construction

[0058] The present invention will be further described below in conjunction with accompanying drawing:

[0059] Such as figure 1 As shown in the present invention, a method for dynamic evaluation of pile insertion quality based on a self-elevating offshore platform includes the following steps:

[0060] The first step is to determine the corresponding coordinates and the formation bearing capacity per unit area of ​​the pile foot of the corresponding formation through marine geological survey and laboratory testing [σ p ] and side friction per unit area f to generate the relationship curve between bearing capacity per unit area and depth and the relationship curve between side friction per unit area and depth, such as figure 2 shown;

[0061] The following are the ultimate bearing capacity per unit area for pile feet of different types of strata [σ p ] and the calculation method of side friction per unit area f:

[0062] a. When the soil layer is undrained cohesive soil, ...

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Abstract

The invention discloses a self-elevating platform-based pile penetration quality dynamic-evaluation method, which comprises the following steps of firstly determining the bearing capacity, i.e. stratum piercing pressure [sigmap], of a unit area of a corresponding stratum at corresponding coordinates by marine geological survey and laboratory tests, and employing the data as a standard parameter for safety control over the pile penetration of a self-elevating platform; then measuring and calculating a stratum depth reached by the end part of a pile shoe of each pile leg and actual unit area ballast force sigmaf in real time in a pile penetration process of the platform, and calculating a relative piercing safety coefficient n=[sigmap] / sigmaf to determine the reliability of the pile penetration position of the self-elevating platform. According to the self-elevating offshore platform-based pile penetration quality dynamic-evaluation method, gaps in the in-situ pile penetration quality judgment of the self-elevating offshore platform in the prior art are effectively filled in, technical support is provided for offshore oil engineering, and the operation safety and reliability of the self-elevating platform are maximally ensured.

Description

technical field [0001] The invention relates to a dynamic evaluation method, in particular to a dynamic evaluation method for pile insertion quality based on a jack-up offshore platform. Background technique [0002] At present, offshore oil fields are the main position for increasing oil reserves and production in my country. The "Twelfth Five-Year Plan" planning and construction of oilfields clearly requires strengthening the operation of key areas and key projects of offshore oilfields. As offshore oilfields take over as key resources, the workload of exploration and development, especially the workload of drilling, has risen rapidly, and various types of platforms such as offshore drilling and operations have become more and more frequent in pile insertion operations, improving the scientific nature of the platform pile insertion and extraction process. , rationality, and accuracy become more and more important. [0003] During the shifting operation of the offshore dr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D33/00
Inventor 安长武杨玉精彭吉友安有杰张跃隋迎光吕国升李成军马安彪任华杨兵兵蒋鹏
Owner 东营市胜软石油技术开发有限公司
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