A combined multi-tube jacket foundation structure and its construction method

Abstract

The invention belongs to the technical field of foundation structures of marine engineering, and discloses a combined multi-tube jacket foundation structure and a construction method thereof. The upper parts of a plurality of steel tubes are connected to a steel roof, and the lower part of the steel roof is between every two adjacent steel tubes. Connect the steel groove, set the concrete slab on the steel roof, set the outer ring beam, the middle ring beam, the inner ring beam, the concrete main beam, and the concrete secondary beam on the top of the concrete slab; the upper part of the middle ring beam and the inner ring beam is used to install the upper wind power The jacket structure of the equipment, the jacket structure includes columns, support rods and diagonal rods; its construction methods include onshore prefabrication, shore commissioning, water towage, negative pressure sinking, negative pressure reinforcement and other steps. The invention has the advantages of both the cylindrical foundation and the jacket foundation, wide application range, convenient transportation and installation, recyclable utilization, and high bearing capacity, and can transfer the upper fan load to the concrete roof through the jacket structure, and convert it into a structural The controlled tensile and compressive stress is transmitted to the lower steel cylinders.

Description

technical field [0001] The invention relates to the technical field of foundation structure of marine engineering, in particular to a multi-tube composite 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 gravity foundation relies on the weight of the structure and the weight of the filler and ballast on it to resist external loads and maintain structural stability. The construction principle is simple, the cost of filler and ballast materials is low, and the construction cost is relatively low for shallow foundations; but the foundation The self-weight and geometric size are large, the foundation occupies a wide range of seabed, and has high requirements on geological conditions. Therefore, the gravity-type fou...

AI Technical Summary

Problems solved by technology

However, 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, and large-scale equipment is required for transportation and installation.

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