Draught fan foundation structure with single pile of transition sections and construction method

Abstract

The invention discloses a draught fan foundation structure with a single pile of transition sections. The draught fan foundation structure with the single pile of the transition sections comprises a single pile body and the transition sections. The transition sections are internally arranged on the inner side of the single pile body and are connected with the single pile body to form a whole through welding. The upper ends of the transition sections are connected with an upper tower barrel through flange rings. Operation platforms are arranged at the upper end of the single pile body and are located on the outsides of the lower ends of the transition sections. The operation platforms are clamped and buckled in preformed clamping grooves in the outside of the upper end of the single pile body. A construction method comprises five steps. The draught fan foundation structure with the single pile of the transition sections is different from a structure scheme with transition sections on the outsides, offshore grouting is not needed, the offshore operation time is saved and the cost is reduced; in addition, the transmission force of the structure is mainly conducted through a welding structure, so that the reliability of the structure is increased. Compared with a single pile foundation without a transition section structure, the requirements for construction equipment and construction technology are lowered; under the background that offshore wind power will be developed on a large scale, the construction progress is speeded up, and the verticality requirement of a single pile foundation and the safety of a flange ring structure can be ensured.

Description

technical field [0001] The invention relates to a fan base structure, in particular to a single-pile fan base structure with a transition section and a construction method. Background technique [0002] The single-pile foundation structure of offshore wind turbines is widely used due to its advantages of simple design, convenient construction, easy construction, and investment saving. The single-pile foundation structure of offshore wind turbines in Europe accounts for between 60% and 70%. Some aircraft positions also use monopile structures. According to European and domestic experience, offshore wind turbine units have relatively high requirements on the verticality of single piles. For this reason, two schemes are adopted for the single pile foundation structure of offshore wind turbines: a structure with a transition section (outside) and a structure without a transition section. The single pile foundation of the European offshore wind farm controls the verticality of t...

AI Technical Summary

Problems solved by technology

For the structural scheme without transition section: During the piling process, how to ensure the verticality of the single pile structure and the safety of the flange ring structure has become the focus of construction, and it also puts forward higher requirements for the construction ship and construction technology, so The existing single-pile fan foundation structure without a transition section has a simple structure but poor bearing capacity and a short practical life. Although the structure with a transition section has a strong bearing capacity, the structure is complex and the installation is cumbersome, time-consuming and laborious.

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