Sea gravity type pile foundation combined fan foundation

A technology of gravity foundation and fan foundation, which is applied in the direction of infrastructure engineering, construction, etc., can solve unscientific and uneconomical problems, and achieve the effect of simple construction, good economy, and reduced settlement

Inactive Publication Date: 2010-09-22
CHINA NAT OFFSHORE OIL CORP +2
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Problems solved by technology

If the gravity foundation can be used as the foundation for the installation of offshore wind turbines, it will be of great significance. However, when the foundation soil in seawater is soft, its natural foundation bearing capacity cannot meet the requirements of the gravity foundation. At this time, if only by increasing the gravity It is often very unscientific and uneconomical to reduce the pressure at the bottom of the foundation bed

Method used

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  • Sea gravity type pile foundation combined fan foundation
  • Sea gravity type pile foundation combined fan foundation
  • Sea gravity type pile foundation combined fan foundation

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Embodiment Construction

[0014] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0015] In order to meet the requirements of increasing the bearing capacity of the foundation under a given size and reducing the amount of construction work as much as possible, the present invention adopts a combined foundation scheme, the upper part adopts a gravity foundation to connect with the tower, and a layer with certain The thickness of the riprap foundation bed is used to evenly distribute the pressure and reduce settlement. The foundation bed is used as a composite foundation by sparsely distributing PHC pipe piles to improve the bearing capacity of the natural foundation.

[0016] Such as Figure 1~2 As shown, the gravity foundation 1 is constructed by selecting concrete with a certain strength grade and certain functional requirements according to the seawater environment and strength requirements. According to the requirements of stre...

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Abstract

The invention relates to a sea gravity type pile foundation combined fan foundation, which is characterized by comprising a gravity type foundation, wherein the gravity type foundation is arranged on a rubble bed with certain thickness, and a composite foundation with PHC pile piles is arranged below the rubble bed; the gravity type foundation comprises a flat-bottom base with certain bottom thickness and wall thickness, a pillar is arranged in the base in a sitting way, and a plurality of partition plates connected between the base and the pillar, and the rubble base is formed by adding a rubble with certain thickness in a foundation trench; the spacing of the PHC pipe piles distributed in the composite foundation is 5 to 6 times of pile diameter, and a ballast weight material can be added in the spaces between the partition plates; and the rubble bed can be of an underground bed, an overground bed or a mixed bed. The invention adopts optimized combined design, allows the size of the gravity type foundation and the number of the PHC pipe piles to be the best in safety and economy, plays the potential carrying capacity of a natural foundation compared with other foundation treatment schemes, and has better subsidence reducing effect.

Description

technical field [0001] The invention relates to an offshore installation infrastructure, in particular to an offshore gravity-type pile foundation combined wind turbine foundation. Background technique [0002] At present, the gravity foundation is generally used on the barge wharf, and the subgrade bearing the gravity foundation is mainly a natural foundation. If the gravity foundation can be used as the foundation for the installation of offshore wind turbines, it will be of great significance. However, when the foundation soil in seawater is soft, its natural foundation bearing capacity cannot meet the requirements of the gravity foundation. At this time, if only by increasing the gravity It is often very unscientific and uneconomical to reduce the pressure at the bottom of the subgrade bed by using the size of the foundation. In addition, due to the inconvenient construction in seawater, we also need to reduce the amount of work in construction as much as possible. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D27/12E02D27/42
Inventor 尚景宏刘桦林伟明罗锐朱鹏陈龙珠马宏旺宋春雨
Owner CHINA NAT OFFSHORE OIL CORP
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