Net cage anchoring foundation with multiple umbrella-shaped trays centrally symmetric and construction method thereof

Abstract

The invention discloses a net cage anchoring foundation with multiple umbrella-shaped trays centrally symmetric and a construction method thereof. The net cage anchoring foundation with multiple umbrella-shaped trays centrally symmetric comprises the five umbrella-shaped trays and a connecting support, the umbrella-shaped trays are uniformly welded into an umbrella shape through circumferential rebars and radial rebars, and a sleeve is arranged in the center of the bottom of each umbrella-shaped tray; a supporting base is arranged in the center of the connecting support, a mooring hole is formed in the upper end of the supporting base, and four positioning columns distributed symmetrically in pairs with the supporting base as the center are arranged on the connecting support; during work, one umbrella-shaped tray is arranged on the supporting base through the corresponding sleeve in a sleeving mode, the other four umbrella-shaped trays are arranged on the positioning columns in a sleeving mode to form the anchoring foundation, one end of an anchor chain is tied to the mooring hole in the supporting base to be fixed, the anchoring foundation sinks to a seabed in a preset sea area, and gravel bags are put into umbrella-shaped tray openings and press the umbrella-shaped trays to form the net cage anchoring foundation and provide mooring force needed by net cages. The net cage anchoring foundation is simple in structure, small in weight, easy to construct and capable of providing large mooring force.

Description

[0001] Technical field: [0002] The invention relates to an anchoring system for seawater culture net cages, and more particularly relates to a center-symmetrical net cage anchoring foundation of a plurality of umbrella-shaped trays and a construction method thereof. [0003] Background technique: [0004] The sea area within the 20m isobath in my country is about 16 million hectares, and the sea area within the 40m isobath is about 50 million hectares. There is huge room for the development of mariculture. However, at present, my country's marine aquaculture areas are mainly concentrated in shallow bays within the 15 m isobath, and the utilization rate of sea areas exceeding 20 m water depth is less than 1%, which is far below the level of developed countries such as the United States, Japan, and Norway. Therefore, vigorously developing deep-water cage culture with a water depth of more than 20 m is one of the new ways to solve the food supply security in our country. [000...

AI Technical Summary

Problems solved by technology

However, at present, my country's marine aquaculture areas are mainly concentrated in shallow bays within the 15 m isobath, and the utilization rate of sea areas exceeding 20 m water depth is less than 1%, which is far below the level of developed countries such as the United States, Japan, and Norway.

Among them, the iron anchor is borrowed from the anchoring method of the ship. The anchor body is made of castings. The anchoring force is proportional to the weight of the anchor body. To obtain sufficient anchoring force, more investment is required. The heavier iron anchor needs a special workboat to operate, and Difficult to locate accurately, the advantage is that it can be used in more complicated sea areas on the seabed; the price of wooden pile anchors is relatively cheap, and generally requires that the pile diameter is greater than 40 cm, the depth of penetration exceeds 4.5m, and the angle between the anchor rope and the horizontal seabed is not greater than 17° , but it has the disadvantages that the construction quality is difficult to guarantee and the wooden piles are easy to corrode. It is suitable for sea areas with shallow water depth and sandy bottom; the price of cement pier anchors is moderate, and the mooring force is proportional to the weight of the cement pier. The adsorption force between the beds is limited, and anchoring is prone to occur in harsh sea conditions, suitable for sea areas with sandy mud or sandy bottom

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