Disc type composite single-pile fan foundation suitable for soft soil seabed and construction method

Abstract

The invention discloses a disc type composite single-pile fan foundation suitable for a soft soil seabed and a construction method. The disc type composite single-pile fan foundation comprises a center large-diameter single pile and sand compaction piles arranged around the center large-diameter single pile; a seabed surface sand pile reinforcing area is formed by the sand compaction piles around the center large-diameter single pile; a reinforced concrete disc plate is arranged on the seabed surface sand pile reinforcing area; and the center large-diameter single pile is connected with the reinforced concrete disc plate through underwater high-strength grouting. The construction method comprises the steps that 1), the center large-diameter single pile is driven into the seabed by the assigned depth; 2), a sand pile ship is adopted for conducting driving construction on the sand compaction piles, and the driving sequence of the sand compaction piles is from inside to outside around the piles; 3), sinking and installing of the reinforced concrete disc plate of the seabed surface sand pile reinforcing area are completed through a floating crane ship; 4), the annular space between the reinforced concrete disc plate and the center large-diameter single pile is connected through underwater high-strength grouting; and 5), installing of a cage or other accessory components is completed through the floating crane ship.

Description

technical field [0001] The invention relates to the technical field of offshore foundation structure construction, in particular to a disc-type composite single-pile wind turbine foundation suitable for weak soil seabeds and a construction method. Background technique [0002] Wind energy is an important clean energy that plays an important role in controlling carbon emissions, mitigating global climate change, and ensuring energy security. Offshore wind power has significant advantages such as high wind speed, low wind shear, low turbulence, high output, close to the load center, and convenient consumption. It has become one of the renewable energy sources with rapid development and the best industrial prospects. Weak soils are widely distributed in offshore waters. At present, the foundations of wind turbines in soft soil seabeds generally adopt high pile caps, jackets, and large-diameter single piles. In practical engineering applications, their promotion and application...

AI Technical Summary

Problems solved by technology

However, single piles are greatly constrained by seabed geological conditions and water depth. Under unfavorable environments such as soft soil seabeds and large water depths, the applicability of single piles faces great challenges. ), ultra-large diameter (>10m), and ultra-long single piles are very difficult to manufacture and construct, and even difficult to complete under the current construction conditions, which greatly limits the scope of application of single piles

[0006] Based on the above analysis, for the weak soil seabed, there is a lack of a basic new technology that is safe, reliable, convenient to construct, and economically reasonable to promote the continuous and rapid development of offshore wind power.

Images