Subdivision suction bucket-shaped foundation for preventing hole blocking by soil plug and reverse grouting

Abstract

The invention discloses a subdivision suction bucket-shaped foundation for preventing hole blocking by soil plug and reverse grouting. The subdivision suction bucket-shaped foundation comprises a suction bucket and water pumping installation equipment. The suction bucket comprises a suction bucket top plate, an outer bucket wall, an inner bucket wall and compartment rib plates, wherein the suctionbucket top plate, the outer bucket wall, the inner bucket wall and the compartment rib plates are fixedly connected, and the inner bucket wall and the compartment rib plates divide the suction bucketinto an inner side compartment and a plurality of outer side compartments. The subdivision suction bucket-shaped foundation further comprises a soil plug baffle, a soil plug detection device, a waterthrough hole and a geotextile filter screen. A filter screen is arranged in the foundation, and the hole blocking phenomenon possibly occurring in the injection process is prevented. The soil plug baffle and the detection device are arranged in the foundation, whether the height of the soil plug in the bucket exceeds the limit or not can be monitored in real time, and when the whole height of thesoil plug reaches the soil plug baffle, constructors can stop further suction injection according to monitoring data and then perform reverse grouting to fill gaps. Slurry injected into the bucket can ensure that a top cover of the suction bucket is in complete contact with the soil body, so that the installation quality of the suction bucket is improved, and the bearing capacity of the suction bucket and the safety of the bucket top plate structure are further ensured.

Description

Technical field[0001]The invention belongs to the technical field of offshore wind power engineering, and specifically relates to a sub-cabin suction bucket foundation with anti-soil plugging and reverse grouting.Background technique[0002]In recent years, my country has vigorously developed renewable clean energy, and offshore wind energy resources have always been the focus of attention. Offshore wind power technology is currently the most important way to develop offshore wind energy resources. Offshore wind power accounts for more than 30% of the total investment in offshore wind power. Currently, the conventional offshore wind turbine foundations are monopile foundations and jacket foundations. However, with the expansion of offshore wind power development and the complication of environmental conditions, new suction bucket foundations are gradually popularized. The suction bucket foundation uses negative pressure to sink, and the water in the bucket is drawn to form a water pre...

AI Technical Summary

Problems solved by technology

[0004] During the negative pressure sinking process of the suction barrel, the soil at the bottom of the barrel pours into the barrel, and the height of the soil plug continues to increase. However, due to the influence of the friction of the barrel wall, the height of the soil plug does not develop uniformly. It may cause some soil plugs to block the drain, which will affect the continued sinking of the barrel

This result may also cause engineering personnel to misjudge that the barrel body has been installed in place and stop follow-up corrective measures

However, due to the uneven development of the soil plug, there are many cavities inside the bucket, and the soil in the cavities is not in contact with the top plate of the suction bucket

In this case, on the one hand, the overall bearing capacity of the barrel body will be significantly reduced, and on the other hand, the barrel roof will be locally stressed under the action of external loads, resulting in significant stress concentration, which directly endangers the safety of the foundation structure.

Images