Combined composite cylinder buoyancy tank foundation structure and construction method thereof

Abstract

The invention belongs to the technical field of foundation structures of ocean engineering and discloses a combined composite cylinder buoyancy tank foundation structure and a construction method thereof. The combined composite cylinder buoyancy tank foundation structure comprises a steel cylinder structure with a subdivision structure, the top of the steel cylinder structure is connected with a steel buoyancy tank, a circular through hole is formed in the center of the steel buoyancy tank, and the steel buoyancy tank is internally provided with one middle ring rib plate, one inner ring rib plate, a plurality of radial rib plates and a plurality of connecting parts; and the upper part of the steel buoyancy tank is connected with a transition section tower frame, and the transition sectiontower frame is used for being connected with upper wind power equipment. The construction method of the combined composite cylinder buoyancy tank foundation structure comprises the steps of on-land prefabrication, shoreside hoisting, overwater towing, self-weight sinking, negative-pressure sinking, water-pumping reinforcement, grouting treatment and the like. The combined composite cylinder buoyancy tank foundation structure has the characteristics of a guide pipe frame foundation, a gravity-type foundation and a suction cylindrical foundation, the transporting and mounting modes are simple and convenient while the bearing capacity is improved, recycling can be achieved, and the construction cost is greatly lowered.

Description

technical field [0001] The invention relates to the technical field of foundation structure of ocean engineering, in particular to a composite cylinder combined foundation structure and a construction method thereof. Background technique [0002] At present, in the field of offshore wind power generation, the forms of wind turbine foundations mainly include gravity foundations, jacket foundations, barrel foundations, pile foundations, floating foundations, etc. [0003] The traditional gravity foundation structure is simple, and the overall cost is relatively low. It mainly resists the horizontal force and overturning moment through its own weight and internal filler to maintain the stability of the structure. However, the gravity foundation is only suitable for shallow sea areas. , its economy not only cannot be reflected, but the cost is higher than other types of foundations. At the same time, the gravity foundation requires the foundation to have a high bearing capacity...

AI Technical Summary

Problems solved by technology

As the water depth increases, the wind, wave, and current loads become larger, and the diameter of the cylindrical foundation required for large bending moment loads is larger. Large-scale equipment is required for transportation and installation. At the same time, it is difficult to apply in areas with extremely uneven soil distribution and rock distribution.

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