Single-pile foundation supported by inclined piles and construction method of single-pile foundation

Abstract

The invention discloses a single-pile foundation supported by inclined piles and a construction method of the single-pile foundation. The single-pile foundation comprises large-diameter single piles, the inclined piles, a bearing platform and a supporting device of the bearing platform. The large-diameter single pile and the six inclined piles are circular pipe piles, and the six inclined piles are evenly arranged along the bearing platform at 60-degree intervals. The bearing platform is of a cast-in-place reinforced concrete structure and used for connecting and fixing the large-diameter single pile and the six inclined piles. The supporting device is used for further strengthening connection between the large-diameter single pile and the inclined pile and mainly comprises a large-diameter single pile sleeve, an inclined pile sleeve, a single pile hinge, an inclined pile hinge and a rigid connecting rod. After the large-diameter single pile and the inclined pile are sunk, the large-diameter single pile and the inclined pile are sleeved with the pile body sleeve along the pile body, the pile body of the large-diameter single pile and the pile body of the inclined pile are each provided with an annular supporting table to play a role of a limiting supporting device, and then a high-strength grouting material is injected into a gap between the inner wall of the sleeve and the pile so that the large-diameter single pile and the inclined pile can be firmly bonded; and the single pile hinges and the inclined pile hinges are hinged and connected in a one-to-one correspondence manner through the rigid connecting rods. And finally, bearing platform steel bars are arranged, and bearing platform concrete is poured in two layers.

Description

technical field [0001] The invention belongs to the technical field of offshore pile foundations, and in particular relates to a single pile foundation supported by inclined piles and a construction method thereof. The device can strengthen the strength and rigidity of the single pile foundation. Background technique [0002] The sea area of ​​Fujian is relatively thin, and the driving depth of offshore wind power single piles is limited. In order to meet the bearing capacity requirements, the piles often need to be embedded in rock formations. The offshore construction costs are huge and the construction risks are extremely high. In the process of piling rock-socketing (embedding in moderately weathered rock), if high-strength rocks are encountered, it is very easy to cause continued penetration failure. In addition, for non-rock-socketed single piles, due to complex geological conditions, unfavorable geological conditions such as boulders are often encountered even in ordi...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a solution to the problems that the single pile foundation cannot be directly driven in, the bearing capacity cannot meet the requirements, and the cost and risk of rock-socketed construction are extremely high in shallow overburden layers or sea areas with complex geological conditions such as boulders. Improve the bearing capacity and overall stiffness of the single pile foundation, and avoid the construction cost and construction risk of embedding in the weathered rock

Images