Novel nail type bottom hull base
A cushioning and foundation technology, applied in infrastructure engineering, construction, etc., can solve the problems of inability to discharge silt, discount of apron effect, increased cost, etc., and achieve the effect of improving anti-slip and anti-overturning capabilities.
Pending Publication Date: 2019-11-26
DALIAN UNIV OF TECH
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Problems solved by technology
Although the riprap method can achieve the purpose of partial silting, it has a great impact on the environment and increases the cost. This method is not advocated now; adding skirts to the sinking pad is by installing skirts around the sinking pad. Make it penetrate the silt layer directly to the bearing layer to improve the horizontal anti-slip ability of the sinking pad. However, during the penetration process of the sinking pad, the silt is trapped in the apron and cannot be discharged. The role of the skirt board is greatly reduced, and some skirt boards can't even touch the bottom force-bearing layer, and the function of the skirt board is useless
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[0024] image 3 (a) is a schematic diagram of conventional sinking cushion foundation penetrating into the seabed in actual engineering. Because the bottom area of sinking is very large, it often can only penetrate into the soft soil layer, and it is impossible to squeeze all the silt through to the hard soil layer. A shear weak zone is formed between the bottom surface of the sinking pad and the hard soil layer at the bottom, which has poor anti-slip capability, and the drilling platform is prone to horizontal slip and overturning under loads such as wind, wave and current. image 3 (b) is a schematic diagram of the apron-type sinking pad foundation penetrating into the seabed. The horizontal anti-slip capability of the sinking pad can be improved by adding skirts around the sinking pad to penetrate the mud layer and reach the bearing layer directly. However, during the penetration process of the sinking pad, the silt is trapped in the apron and cannot be discharged, and t...
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The invention belongs to the technical field of movable platform installation in offshore engineering of rock soil, geology, environment and the like, and provides a novel nail type bottom hull base.The goal of improving the anti-sliding and anti-overturning capability of the whole platform is achieved. The novel nail type bottom hull base mainly consists of a bottom hull base of any one form anda plurality of anti-sliding nails. The anti-sliding nails are fixed under the existing bottom hull base in any one form; the dimension of the anti-sliding nails is determined according to the thickness of a silt layer of a target sea area; and meanwhile, the deflection-resistant requirements need to be met. The novel nail type bottom hull base provided by the invention is applicable to all movable sea platforms requiring the bottom hull base, and the anti-sliding and anti-overturning capability of the whole platform can be improved under the condition of not influencing the environment.
Description
technical field [0001] The invention belongs to the technical field of movable platform installation in offshore engineering such as geotechnical, geological and environmental, and relates to a novel nail-type cushion foundation. Background technique [0002] Shallow sea areas such as Shengli Oilfield, Dagang Oilfield and Liaohe Oilfield along the coast of the Bohai Sea in my country extend into the sea, where the tidal range is large and the seabed slope is small. For the development of oil resources in such shallow sea areas, it is very suitable to adopt simple structure, low investment and short construction period. , but it needs a bottom-mounted drilling platform based on a relatively flat seabed. [0003] Bottom-sitting drilling platforms are generally composed of an upper hull and a lower cushion. The size of the cushion is equivalent to that of the upper hull. During installation, water ballast is injected into the cushion so that it sits on the seabed to provide bear...
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Login to View More IPC IPC(8): E02D27/52
CPCE02D27/52E02D27/525
Inventor 于龙张荷月李书兆王忠涛
Owner DALIAN UNIV OF TECH