CN109110057B

CN109110057B - Pile type mooring device suitable for shallow water floating platform

Info

Publication number: CN109110057B
Application number: CN201811080066.0A
Authority: CN
Inventors: 丁军; 程小明; 吴波; 周叶; 田超; 余俊
Original assignee: 702th Research Institute of CSIC
Current assignee: 702th Research Institute of CSIC
Priority date: 2018-09-17
Filing date: 2018-09-17
Publication date: 2020-02-07
Anticipated expiration: 2038-09-17
Also published as: CN109110057A

Abstract

The invention relates to a pile mooring device suitable for a shallow water floating platform, which comprises a plurality of lower buoys arranged at intervals, wherein the upper surface of each lower buoy is provided with a middle upright post, the height of each middle upright post is the same, the top surfaces of the middle upright posts are simultaneously provided with an upper platform structure, the upper platform structure is horizontally arranged, a plurality of piles are inserted into the outer part of the front end surface of the upper platform structure, each pile is inserted into a seabed foundation, and after the piles are inserted, the top of each pile is higher than the top surface of the upper platform structure; an anti-collision pad is arranged in a space between the pile column and the front end face of the upper platform structure; mooring cables are respectively fixed to two end faces of the pile, a plurality of groups of cable guide holes are formed in the front end face of the upper platform structure at intervals, one end of each mooring cable is fixed to the pile, the other end of each mooring cable is connected to an anchor machine through the cable guide holes, two mooring cables are respectively installed on each pile, and the two mooring cables are in a fan-shaped structure divergence mode. Compact structure and reliable operation.

Description

Pile type mooring device suitable for shallow water floating platform

Technical Field

The invention relates to the technical field of ocean engineering systems, in particular to a pile mooring device suitable for a shallow water floating platform.

Background

The coral reef plates with the width of hundreds to thousands of meters and shallow water depth are usually surrounded around the marine island reef in China, and the reef plates not only have abundant fishery and tourism resources, but also play important roles in wave absorption and island protection. In order to develop ocean resources, various floating body structures can be arranged near the island reef to serve as comprehensive guarantee bases for ocean development, fishery production, environmental tourism and the like. The floating platform near the island needs to be moored to an operation site for a long time through a mooring system, but cannot be like a ship, and can avoid navigation in severe sea conditions, and the floating platform requires the platform to have low-amplitude motion characteristics in production operation and safe and reliable in survival working conditions, so that when a floating structure is designed, the mooring system is correctly determined, and the parameters of motion response of the platform, mooring cable tension and the like in the operation working conditions and the survival working conditions are very important in a reasonable range.

For floating offshore platforms, catenary and taut mooring are the most common forms of mooring. However, the two mooring modes are usually applied to medium and deep water sea areas, and when the two mooring modes are expanded to shallow water environments, a series of problems occur, such as the platform motion response is too large, and therefore the bottoming and negative air gap phenomena occur; the platform resonates with the anchoring system; the uplift force of the anchor is difficult to eliminate, etc. When optimization means such as changing the length of the mooring cables, the pretension, the number of the mooring cables, the tension inclination angle and the like are adopted, the effect is not obvious, the optimization space is small, meanwhile, the interference on the mooring of the ship is caused, and an auxiliary mooring device is needed.

Disclosure of Invention

The present applicant has made an effort to overcome the above-mentioned drawbacks of the prior art and provide a pile mooring apparatus for shallow water floating platforms, which does not interfere with a berthing vessel due to the absence of towed mooring lines, and which can effectively control the motion range of the floating platform by adjusting the pretension of the mooring lines, and which does not cause the problems of resonance between the platform and the mooring system and the uplift force of the anchor, and which is suitable for use in a mooring scheme for a floating platform disposed in shallow water, particularly in the vicinity of an island reef.

The technical scheme adopted by the invention is as follows:

a pile mooring device suitable for a shallow water floating platform comprises a plurality of lower buoys arranged at intervals, wherein the upper surface of each lower buoy is provided with a middle upright post, the height of each middle upright post is the same, the top surfaces of the middle upright posts are simultaneously provided with an upper platform structure, the upper platform structure is horizontally arranged, a plurality of piles are inserted into the outer part of the front end surface of the upper platform structure, each pile is inserted into a seabed foundation, and after the piles are inserted, the top of each pile is higher than the top surface of the upper platform structure; an anti-collision pad is arranged in a space between the pile column and the front end face of the upper platform structure; mooring cables are respectively fixed to two end faces of the pile, a plurality of groups of cable guide holes are formed in the front end face of the upper platform structure at intervals, one end of each mooring cable is fixed to the pile, the other end of each mooring cable is connected to an anchor machine through the cable guide holes, two mooring cables are respectively installed on each pile, and the two mooring cables are in a fan-shaped structure divergence mode.

The further technical scheme is as follows:

the anti-collision pads at the position of each pile are two and are respectively arranged at the front end surfaces of the upper platform structure and the lower buoy.

The mooring cable is a polyester fiber cable.

The invention has the following beneficial effects:

the invention has compact and reasonable structure and convenient operation, the platform is moored on the pile by the mooring rope by placing the pile on the back wave side of the platform, and the anti-collision pad is arranged between the pile and the platform to prevent the platform from directly colliding with the pile. The novel mooring device not only well solves the application problem of the traditional mooring scheme in shallow water, but also can effectively control the motion amplitude of the platform and cannot influence the in-out and mooring of a ship, thereby providing a convenient and reliable mooring device for a floating platform arranged in shallow water.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a side view of fig. 1.

Wherein: 1. a lower float bowl; 2. a middle upright post; 3. an upper platform structure; 4. pile columns; 5. a fender; 6. a mooring line; 7. a cable guide hole; 8. a subsea foundation.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1, fig. 2 and fig. 3, the pile mooring apparatus suitable for a shallow water floating platform of the present embodiment includes a plurality of lower pontoons 1 arranged at intervals, each lower pontoon 1 has an intermediate column 2 on its upper surface, each intermediate column 2 has the same height, an upper platform structure 3 is simultaneously installed on the top surfaces of the intermediate columns 2, the upper platform structure 3 is horizontally installed, and a plurality of piles 4 are inserted into the front end surface of the upper platform structure 3, each pile 4 is inserted into a seabed foundation 8, and after insertion, the top of the pile 4 is higher than the top surface of the upper platform structure 3; an anti-collision pad 5 is arranged in the space between the pile 4 and the front end face of the upper platform structure 3; two end faces of the pile 4 are respectively fixed with mooring cables 6, a plurality of groups of cable guide holes 7 are formed in the front end face of the upper platform structure 3 at intervals, one end of each mooring cable 6 is fixed on the pile 4, the other end of each mooring cable is connected to an anchor machine through the corresponding cable guide hole 7, two mooring cables 6 are respectively installed on each pile 4, and the two mooring cables are in fan-shaped structure divergence forms.

Two anti-collision pads 5 are arranged at each pile 4, and are respectively arranged at the front end faces of the upper platform structure 3 and the lower buoy 1.

The mooring lines 6 are polyester fiber lines.

The invention mainly comprises a lower buoy 1, a middle upright post 2 and an upper platform structure 3, wherein in the actual working process, firstly, the hydrodynamic load suffered by the floating platform is preliminarily estimated based on a numerical simulation or pool test method, the material and the section parameters of the pile 4 are selected according to the hydrodynamic load, the lower end of the pile 4 is inserted into a seabed foundation 8, and the upper end of the pile is higher than the top of the upper platform structure 3. Suitable fender 5 are selected according to the distance between the pile 4 and the upper platform structure 3, and the fender 5 are arranged adjacent to the upper platform structure 3 and the lower buoy 1, respectively, for preventing direct collision between the upper platform structure 3 and the pile 4. Hydrodynamic load that upper portion platform structure 3 received mainly transmits on stake 4 through mooring cable 6, and mooring cable 6 can select the polyester fiber cable of different parameters according to the size of atress, and mooring cable 6 one end is fixed on stake 4, and for avoiding the friction between 5 with the fender, mooring cable 6 divides into two strands and becomes fan-shaped and disperse and make the other end be connected to the anchor machine through upper portion platform structure 3's fairlead 7.

The present invention improves upon the disadvantages of conventional mooring schemes on floating platforms arranged in shallow water by using mooring lines 6 to directly transfer the hydrodynamic load on the platform to the piles 4 and placing fenders 5 between the upper platform structure 3 and the piles 4 to prevent direct collision between the upper platform structure 3 and the piles 4. The mooring force of the platform is transmitted to the seabed foundation 8 through the mature pile foundation technology at present, the problems of anchoring system resonance and anchor uplift force in shallow water in the traditional mooring scheme are solved, and the docking ship cannot be interfered. The mooring device has the advantages of simple structure, clear principle and convenient operation, and provides a reliable and efficient mooring device for mooring a floating platform in shallow water.

The above description is intended to be illustrative and not restrictive, and the scope of the invention is defined by the appended claims, which may be modified in any manner within the scope of the invention.

Claims

1. The utility model provides a stake formula mooring arrangement suitable for shallow water floating platform which characterized in that: the floating structure comprises a plurality of lower floating bowls (1) arranged at intervals, wherein a middle upright post (2) is arranged on the upper surface of each lower floating bowl (1), the heights of the middle upright posts (2) are the same, an upper platform structure (3) is arranged on the top surfaces of the middle upright posts (2), the upper platform structure (3) is horizontally arranged, a plurality of pile columns (4) are inserted into the outer part of the front end surface of the upper platform structure (3), each pile column (4) is inserted into a seabed foundation (8), and after the pile columns are inserted, the tops of the pile columns (4) are higher than the top surface of the upper platform structure (3); an anti-collision pad (5) is arranged in the space between the pile column (4) and the front end face of the upper platform structure (3); mooring ropes (6) are respectively fixed on two end faces of the pile (4), a plurality of groups of cable guide holes (7) are formed in the front end face of the upper platform structure (3) at intervals, one end of each mooring rope (6) is fixed on the pile (4), the other end of each mooring rope is connected to an anchor machine through the cable guide holes (7), two mooring ropes (6) are respectively installed on each pile (4), and the mooring ropes are in a fan-shaped structure divergence form; two anti-collision pads (5) at each pile (4) are respectively arranged at the front end surfaces of the upper platform structure (3) and the lower buoy (1); the mooring cable (6) is a polyester fiber cable.