CN212797217U

CN212797217U - Ocean engineering exhibition wing anchor

Info

Publication number: CN212797217U
Application number: CN202021068568.4U
Authority: CN
Inventors: 田英辉; 王荣; 林巍; 张春会; 程宁; 陶然
Original assignee: Tianjin University; China Harbour Engineering Co Ltd
Current assignee: Tianjin University; China Harbour Engineering Co Ltd
Priority date: 2020-06-11
Filing date: 2020-06-11
Publication date: 2021-03-26
Anticipated expiration: 2030-06-11

Abstract

The utility model discloses an ocean engineering wing-unfolding anchor, which consists of two symmetrical anchor sheets, wherein the top ends of the two anchor sheets are movably connected with an anchor eye through anchor bolts and rotate relatively; each anchor piece consists of an anchor plate and an anchor button, and each anchor button is vertically arranged in the middle of the upper surface of the anchor plate. The utility model discloses can greatly reduce the buried depth loss in the installation, help obtaining bigger bearing capacity.

Description

Ocean engineering exhibition wing anchor

Technical Field

The utility model relates to an engineering anchor, more specifically the saying so relates to an ocean engineering exhibition wing anchor.

Background

With the development of ocean oil and gas into deep water and the rise of ocean renewable energy, the floating structure is replacing the traditional fixed structure and becomes the main technical means for energy development in deep water and sea areas. Common floating structures include floating platforms, floating wind generators, and semi-submersible wave motors. Among them, how to safely, economically and reliably anchor these floating structures on the sea bottom has become one of the key issues in ocean energy development. The plate anchor is completely buried deep in the seabed, and the bearing capacity is provided by means of the soil resistance of a main anchor plate (fluke). Compared with other types of foundations such as pile foundations and the like, the plate anchor has the advantages of light weight, high bearing capacity, simplicity in operation, low cost, recyclability and the like. For example, the plate anchor adopted by the Brazilian Voador project has the dead weight of only 15 percent compared with a suction caisson which can provide the same bearing capacity, the installation time is shortened by 2/3, and the engineering cost is only 50 percent. The plate anchor has the unique characteristics, so that the plate anchor has the advantages which are not possessed by other anchoring types, and has wide application prospect and potential in a deepwater anchoring system.

Current deep water plate anchors mainly include a conventional Drag Embedded Anchor (DEA) for fixing an Anchor shank, a normal Loaded Anchor (VLA) for adjusting an Anchor shank, and a newer suction penetration plate Anchor (SEPLA). Both DEA and VLA belong to the drag-mounted anchor, the anchor shank of the DEA is fixed to the anchor plate, and the direction is not adjustable. The advantage of the VLA is that the shank of the anchor can be adjusted after installation to maximize the area of the anchor plate that is stressed, the disadvantages are that both anchors require a large installation distance and that accurate positioning of the plate anchor is difficult. Sepa is a new type of plate anchor that has emerged in recent years, largely overcoming the deficiencies of DEA and VLA. The SEPLA is an important deep sea ocean foundation structure form, and has the characteristics of light weight, convenience in installation and operation, low cost and the like. The SEPLA is arranged in the suction caisson, the suction caisson is arranged on the surface of a seabed through an installation ship, water in the suction caisson is pumped out, the suction caisson is in a negative pressure state, the water pressure outside the barrel is added, the suction caisson is pressed into the seabed to a preset depth, then the suction caisson is taken out, the SEPLA is kept in the soil body, and the SEPLA is dragged through an anchor chain to be in a bearing state in a rotating mode, so that the SEPLA installation is completed. In the rotary installation process of the SEPLA, the SEPLA is rotationally pulled up and moves upwards, and the burial depth loss is generated. Because the strength of the ocean saturated rock soil and the burial depth are in a linear relation, the bearing capacity of the SEPLA is greatly reduced due to the burial depth loss, and the bearing capacity of the SEPLA is greatly influenced. How to reduce the buried depth loss and improve the bearing capacity of the plate anchor is a scientific and technical problem to be solved urgently in the development of the suction anchor at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming not enough among the prior art, providing a ocean engineering exhibition wing anchor, can greatly reduce the buried depth loss in the installation, help obtaining bigger bearing capacity.

The purpose of the utility model is realized through the following technical scheme.

The utility model discloses a ocean engineering wing-unfolding anchor, which consists of two symmetrical anchor sheets, the top ends of the two anchor sheets are movably connected through anchor bolts and anchor eyes and rotate relatively; each anchor piece consists of an anchor plate and an anchor button, and each anchor button is vertically arranged in the middle of the upper surface of the anchor plate.

The anchor plate is rectangular, the anchor buttock is plate-shaped and comprises two right-angle sides and a bevel edge, the bevel edge is arc-shaped, and the length of the bottom right-angle side of the anchor buttock is equal to the width of the anchor plate; the top ends of the two anchors are movably connected with the anchor eyes through anchor bolts.

Compared with the prior art, the utility model discloses a beneficial effect that technical scheme brought is:

compare in DEA and VLA, the utility model discloses ocean exhibition wing anchor basis installation does not need great towing distance, compares in SEPLA, the utility model discloses ocean engineering exhibition wing anchor can greatly reduce the buried depth loss in the installation, helps obtaining bigger bearing capacity.

Drawings

Fig. 1 is a schematic view of the ocean engineering wing spreading anchor of the present invention being placed in the seabed through a suction caisson;

fig. 2 is a schematic view of the installation process of the ocean engineering wing spreading anchor of the utility model under the dragging of the anchor cable;

fig. 3 is the installation completion schematic diagram of the ocean engineering wing-spreading anchor of the utility model.

Reference numerals: 1 anchor plate, 2 anchor buttock, 3 anchor eyes, F anchor cable pulling force.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in figures 1 to 3, the ocean engineering wing-spreading anchor of the utility model comprises two symmetrical anchor sheets, and two anchor sheets share one anchor eye 3, and realize swing joint and relative rotation through anchor bolt and anchor eye 3. Each anchor piece consists of an anchor plate 1 and an anchor button 2, and each anchor button 2 is vertically arranged in the middle of the upper surface of the anchor plate 1. The anchor plate 1 is rectangular, the anchor buttock 2 is plate-shaped and comprises two right-angle sides and a bevel edge, the bevel edge is arc-shaped, and the length of the bottom right-angle side of the anchor buttock 2 is equal to the width of the anchor plate 1; the top ends of the two anchoring rods 2 are movably connected with the anchoring eyes 3 through anchor bolts.

The utility model discloses ocean engineering exhibition wing anchor passes through the suction caisson and buries in predetermined seabed soil position, then pulls the exhibition wing anchor through the anchor rope, and two anchor pieces of exhibition wing anchor expand fast, accomplish the installation, reach the design and bear the weight of the state.

During the installation, the utility model discloses two anchor slabs 1 of ocean engineering exhibition wing anchor are parallel to each other, and are vertical downwards, place in the suction caisson, through the predetermined degree of depth of suction caisson embedded in the seabed, then take out the suction caisson, the exhibition wing anchor is kept somewhere in the seabed, as shown in fig. 1. The anchor sheet of the spread wing anchor is rapidly spread out by pulling the anchor line by the installation vessel, as shown in fig. 2. And finally, the anchor sheet is completely unfolded, the wing-spreading anchor is installed, and the load transmitted by the anchor cable is borne, as shown in figure 3.

The large deformation finite element and centrifuge test simulation result show, the utility model discloses ocean engineering exhibition wing anchor's anchor piece expandes rapidly, expandes the in-process at two anchor pieces, and the soil body is to the passive soil pressure full play of two anchor pieces, and this has restrained pulling out on the exhibition wing anchor, has reduced corresponding buried depth loss, and buried depth loss only is about 35% of same size SEPLA, helps improving the bearing capacity of anchor.

Although the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above specific functions and operations, and the above specific embodiments are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, which is within the protection scope of the present invention.

Claims

1. The ocean engineering wing-unfolding anchor is characterized by consisting of two symmetrical anchor sheets, wherein the top ends of the two anchor sheets are movably connected with an anchor eye through anchor bolts and rotate relatively; each anchor piece consists of an anchor plate and an anchor button, and each anchor button is vertically arranged in the middle of the upper surface of the anchor plate.

2. The ocean engineering winging anchor of claim 1, wherein the anchor plate is rectangular, the anchor buttock is platy and comprises two right-angled sides and a bevel edge, the bevel edge is arc-shaped, and the length of the right-angled side at the bottom of the anchor buttock is equal to the width of the anchor plate; the top ends of the two anchors are movably connected with the anchor eyes through anchor bolts.