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Pile foundation dismounting method and offshore foundation dismounting method

A technology for offshore foundations and pile foundations, which is applied in foundation structure engineering, sheet pile walls, buildings, etc., and can solve problems such as high dismantling costs, large dismantling costs, and long dismantling cycles

Active Publication Date: 2018-12-18
CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Compared with the jacket structure in the oil and gas industry, the foundation structure of offshore wind turbines is relatively small. If the jacket structure dismantling method in the oil and gas industry is adopted, the dismantling cost will be too high and the dismantling cycle will be long, resulting in huge dismantling costs

Method used

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  • Pile foundation dismounting method and offshore foundation dismounting method
  • Pile foundation dismounting method and offshore foundation dismounting method
  • Pile foundation dismounting method and offshore foundation dismounting method

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Embodiment Construction

[0039] Embodiments of the present invention are described in detail below in conjunction with accompanying drawings:

[0040] It should be noted that when an element is “fixed” to another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only and are not intended to represent the only embodiments.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terminology used herein in the descrip...

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Abstract

The invention relates to a pile foundation dismounting method and an offshore foundation dismounting method. The offshore foundation dismounting method comprises the following steps that lifting ropesare connected to a guiding pipe frame, and the guiding pipe frame is cut; the lifting ropes are lifted, and the guiding pipe frame is removed; the outer sides of pile foundations are sleeved with enclosure sleeves; sea water and sediment between the enclosure sleeves and the pile foundations are removed; connecting bars are arranged between the enclosure sleeves and the pile foundations; the pilefoundations are cut, and thus to-be-removed pile bodies are obtained; and the to-be-removed pile bodies, or the enclosure sleeves or the connecting bar are lifted, and the to-be-removed pile bodies are lifted to the preset positions. During dismounting, the outer sides of the pile foundations are sleeved with the enclosure sleeves, each enclosure sleeve and the corresponding pile foundation are connected into a whole through arrangement of the connecting bars, thus after the pile foundations are cut, the cut to-be-removed pile bodies can be moved to the preset positions by hoisting the enclosure sleeves, or the connecting bars, and the pile foundations are dismounted. Using of a large lifting ship is avoided, the construction period is further shortened, and the removing cost is lowered.

Description

technical field [0001] The invention relates to the technical field of offshore foundation construction, in particular to a pile foundation disassembly method and an offshore foundation disassembly method. Background technique [0002] Offshore foundation is a basic structure used to support offshore facilities, such as wind turbine foundation or oil and gas base foundation. The design life of offshore foundations is usually about 20 years, and if they are subjected to accident conditions such as ship collisions during operation, the life will be shorter. After the offshore foundation reaches its service life or becomes unusable, it needs to be removed within a certain period of time from the perspective of economic benefits (such as the economic benefits of wind farms in the case of wind turbine foundations) and the environment. According to relevant international and domestic laws and regulations, for the foundation structure of the wind turbine, when dismantling the foun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D27/44E02D27/52E02D9/04
CPCE02D9/04E02D27/44E02D27/52
Inventor 王洪庆元国凯毕明君马兆荣
Owner CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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