A Core Barrel Gravity Foundation Strengthened by Umbrella Anchors

Abstract

The invention discloses an umbrella-shaped anchor reinforced core barrel gravity type foundation. The foundation comprises a suction anchor, a concrete weight cover plate, an umbrella-shaped anchor and annular skirt teeth. According to the umbrella-shaped anchor reinforced core barrel gravity type foundation, after the suction anchor penetrates into the soil body by a certain depth based on self weight through suction force negative pressure, the concrete weight cover plate is lifted over an anchor eye through concrete lifting rings so that a reserved hole can be aligned to the anchor eye of the suction anchor, and the concrete weight cover plate is slowly placed on the surface of the suction anchor. The closed umbrella-shaped anchor penetrates through an umbrella-shaped anchor predrilledhole and is inserted into the earth body, after the umbrella-shaped anchor arrives at the preset depth, the umbrella-shaped anchor is pulled upwards so that an anchor body can be unfolded, and finally, concrete is poured so that the concrete weight cover plate and the umbrella-shaped anchor can be combined into a whole; and meanwhile, the annular skirt teeth and the earth body interact to play thebearing force. By combining the concrete weight cover plate with the umbrella-shaped anchor as well as the annular skirt teeth with the traditional suction anchor, the vertical bearing force, the horizontal bearing force and the anti-overturning bearing force of the suction anchor are improved, and meanwhile, the safety performance of the suction anchor and the project usage performance are improved.

Description

technical field [0001] The invention relates to a gravity foundation, in particular to a core barrel gravity foundation reinforced by an umbrella-shaped anchor. Background technique [0002] With the increasing shortage of global energy, the development and utilization of new energy has been widely valued by countries all over the world. Among them, marine wind energy, as a new type of pollution-free and renewable green energy, is of great significance to the sustainable development of the global society. Therefore, offshore wind power With rapid development like mushrooms after a spring rain, the suction anchor, as a form of marine foundation, has the characteristics of adapting to various marine environments. [0003] The suction anchor has the characteristics of simple construction, safety, reliability, and reusability. Compared with traditional pile structure piles, gravity anchors, and chain anchors, it has better economic characteristics. However, in actual engineerin...

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Problems solved by technology

But this patent does not substantially improve the anti-overturning bearing capacity of the suction anchor

[0006] (2) The Chinese patent application number 201820207173.4 introduces a soil plugging-proof suction anchor, including a suction anchor main body, and lateral wing tubes are evenly distributed around the side wall of the suction anchor main body, but the patent main tube is connected to multiple side tubes After being integrated, the integrity is not strong, and it is difficult to exert the carrying capacity as a whole

However, the patent does not improve the anti-overturning bearing capacity

[0008] (4) The Chinese patent with the application number 201711253347.7 introduces a suction-type cylindrical foundation that can rotate downwards, including an anchor cylinder with a closed top surface and an open bottom end, and a rotating power cylinder at the top of the anchor cylinder. This patent significantly reduces the suction force Anchor penetration resistance, but the patent installation is difficult and the soil bearing capacity is reduced due to the excessive disturbance of the soil due to the rotation installation

[0009] (5) The Chinese patent with the application number 201711253348.1 introduces a hollow threaded suction anchor that can rotate downward by itself, including an anchor tube with a closed top surface and an open bottom end. The top of the anchor tube is provided with a drainage hole, which is connected to the submersible pump I , the combination of suction and rotation reduces the penetration resistance and improves the installation efficiency, but this patent fails to improve the anti-overturning bearing capacity of the suction anchor when it is pulled diagonally above the anchor chain

[0010] (6) The Chinese patent application number 201720217185.0 introduces a new type of submarine skirt suction anchor, which includes a concentric suction main barrel, a double skirt structure and an annular groove. The double skirt structure is composed of double skirts that is The outer skirt and the inner skirt surround the cylindrical structure around the periphery of the main suction barrel, but the skirt structure of this patent has little effect on the bearing capacity

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