Offshore electrical platform pile-sleeve foundation structure with anti-caisson structure

Abstract

The invention provides an offshore electrical platform pile-sleeve foundation structure with an anti-caisson structure. The offshore electrical platform pile-sleeve foundation structure comprises a jacket and a sleeve, an anti-caisson is arranged at the bottoms of the jacket and the sleeve, a grouting system is arranged between the jacket and the sleeve, a grouting connecting section is arranged on the sleeve, a steel bar reinforcing structure is arranged at the bottom of the grouting connecting section and in the sleeve, and a passive grouting separator is arranged below the steel bar reinforcing structure; and the anti-caisson comprises a top plate on the top layer, a panel is welded to the lower portion of the top plate, a plurality of apron boards are welded to the periphery of the topplate, and a plurality of rib plates are arranged on the inner sides of the apron boards at intervals. According to the offshore electrical platform pile-sleeve foundation structure, the stability ofthe offshore electrical platform foundation during bottom setting can be effectively improved, the bearing capacity of the grouting connecting section and a pile foundation of the platform structurein the bearing strength limit state is guaranteed, and a new thought is provided for offshore electrical platform design.

Description

technical field [0001] The invention relates to the technical field of offshore wind power generation, in particular to an offshore electrical platform pile-sleeve foundation structure with an anti-caisson structure. Background technique [0002] With the vigorous development of offshore wind power, the site selection of wind farms must consider economic, geological and local regional issues at the same time. The environment for site selection of offshore electrical platforms is more complex and harsh. As the number of electrical equipment such as cabinets increases, the weight of the upper block of the offshore electrical platform also increases. As the fortress for gathering, boosting and outputting power of offshore wind farms, the structural safety of offshore electrical platforms under complex environmental conditions and various combined working conditions directly affects the normal operation of offshore wind farms. [0003] For offshore wind farms located in differe...

AI Technical Summary

Problems solved by technology

When the water depth in the sea area is deep, the amount of foundation steel structure is higher, resulting in greater gravity load effect when it sits on the bottom, and it is difficult to increase the bearing capacity simply by adjusting the stress area of ​​the traditional anti-sinking plate

[0004] On the one hand, increasing the bearing capacity only through the area of ​​the anti-settling slab will increase the weight of the foundation, and the difficulty of offshore construction such as foundation launching and leveling will also increase; Challenge the structural optimization design by adjusting the area of ​​the anti-settling plate

At the same time, in the strength limit bearing state of the offshore electrical platform, the scour effect of the traditional platform foundation is obvious at the position of the pile / main pipe, and the bearing capacity of the pile foundation and the grouting connection section is closely connected with the safety of the platform. The height and spacing of the shear keys increase the bearing capacity, but the problem of the bottom of the grouting material under pressure cannot be effectively solved. Under extreme environmental conditions, the bottom of the grouting material may be damaged under pressure, which will affect the normal use of offshore electrical platforms

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