CN110904920B - Self-elevating construction platform berthing construction method - Google Patents
Self-elevating construction platform berthing construction method Download PDFInfo
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- CN110904920B CN110904920B CN201911180086.XA CN201911180086A CN110904920B CN 110904920 B CN110904920 B CN 110904920B CN 201911180086 A CN201911180086 A CN 201911180086A CN 110904920 B CN110904920 B CN 110904920B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/20—Equipment for shipping on coasts, in harbours or on other fixed marine structures, e.g. bollards
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/20—Equipment for shipping on coasts, in harbours or on other fixed marine structures, e.g. bollards
- E02B3/24—Mooring posts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B2017/0039—Methods for placing the offshore structure
- E02B2017/0047—Methods for placing the offshore structure using a barge
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B2017/0091—Offshore structures for wind turbines
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- General Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention discloses a self-elevating construction platform berthing construction method, which comprises the following steps: s1: ballasting a self-elevating construction platform mat; s2: reducing the height of a platform main body of the self-elevating construction platform; s3: arranging a buffer device at one side of the platform main body, which is ready to receive the berthing of the transport ship; s4: the transport ship is decelerated by throwing a navigation anchor; s5: the transport ship slowly approaches the platform main body until the transport ship is contacted with the buffer device, so that berthing is realized; s6: a connecting structure is arranged between the transport ship and the platform main body, so that the berthing is firm; s7: carrying out hoisting construction operation on the heavy objects on the transport ship; the invention reduces the four-anchor positioning transformation cost of the traditional transport ship or the cost of leasing the four-anchor positioning barge, reduces the risk of the self-elevating platform being impacted, greatly improves the safety, thirdly reduces the four-anchor positioning operation procedures of the transport ship or the positioning barge, and improves the construction efficiency.
Description
Technical Field
The invention relates to a design and manufacturing technology of high-tech ships and ocean engineering equipment, in particular to a self-elevating construction platform berthing construction method.
Background
At present, the hoisting of wind power plant equipment and the piling of partial pile foundations in China offshore wind plants adopt self-elevating construction platforms (500 plus 2000 tons, etc.) for construction operation. However, at the beginning of the design of all the self-elevating lifting platforms, only the lifting operation after lifting off the water surface is performed, so that a condition that a transport ship for transporting fan equipment or a pile foundation has four-anchor positioning capability or a large barge (or transport ship) with four-anchor positioning capability is used as a floating terminal for berthing a small transport ship without four-anchor positioning capability on a construction site must be met when construction operation is performed at sea. This would lead to two disadvantages: most of the maritime transportation ships in China have no four-anchor positioning capability, and four-anchor positioning equipment needs to be added to each ship or one large four-anchor positioning barge (or transportation ship) needs to be rented, so that the construction cost is greatly increased (the four-anchor positioning cost for each transportation ship is increased by about 350 and 850 thousands, and one large positioning barge is rented by about 60-90 thousands/month); by adopting a conventional four-anchor positioning construction mode (no matter a transport ship with a four-anchor positioning function or a barge with a four-anchor positioning function is adopted), the risk of anchor walking exists all the time in each construction operation period (3-7 days/platform) due to the influence of sea condition wind, wave, current, surge, scouring and the like, so that the risk and major accidents of the transport ship or the positioning barge impacting a self-elevating platform (particularly the pile leg of the self-elevating platform are lower in impact resistance of the pile leg), and a large potential safety hazard exists (about 400 thousands of direct economic losses are caused by two transport ships impacting the self-elevating platform due to anchor walking in Jiangsu in the last half of 2019).
Disclosure of Invention
In order to overcome the problems that in the background art, four-anchor positioning equipment is additionally arranged on a common transport ship or the cost of a rented barge is high, and the risk of major accidents caused by anchor walking of the transport ship exists in a conventional four-anchor positioning construction mode, the invention provides a self-elevating construction platform berthing construction method.
A self-elevating construction platform berthing construction method comprises the following steps:
s1: ballasting a self-elevating construction platform mat;
s2: the height of a platform main body 1 of the self-elevating construction platform is reduced;
s3: a buffer device 4 is arranged at one side of the platform main body 1, which is ready to receive the berthing of the transport ship 2;
s4: the carrier 2 is decelerated by throwing the sailing anchor;
s5: the transport ship 2 slowly approaches the platform main body 1 until contacting the buffer device 4 to realize berthing;
s6: a connecting structure is arranged between the transport ship 2 and the platform main body 1, so that the mooring is firm;
s7: the hoisting construction operation of the heavy objects on the transport ship 2 is carried out.
The self-elevating construction platform berthing construction method of claim 1, wherein the step S1 further comprises:
s11: lifting a platform main body 1 of the self-elevating construction platform to 5-6 meters from the sea level;
s12: and (3) compacting the seabed below each pile leg to reach the bearing capacity of 40-100 tons/square meter required by the design.
In one embodiment of the present invention, the platform body 1 is lowered to a position where its bottom is 1-2 m into the water in step S2.
In the preferred embodiment of the present invention, a water level sensor or a scale is provided on the side of the platform body 1, so as to rapidly and accurately obtain the water depth data of the platform body 1.
In one embodiment of the present invention, in step S3, the buffer device 4 is movably connected to the platform body 1, and the buffer device 4 floats on the sea level and is freely floating up and down according to the change of the sea level.
In a preferred embodiment of the present invention, the cushioning device 4 employs multiple sets of impact resistant air bags.
In one embodiment of the invention, in step S4, carrier vessel 2 throws a navigation anchor at a distance of 1100m-150m from the platform body.
In a preferred embodiment of the present invention, the platform body 1 is provided with a radar ranging device and an acousto-optic warning device, the radar ranging device is configured to obtain distance data between the transport ship 2 and the platform body 1, and when the transport ship 2 is 1100m to 150m away from the platform body, the acousto-optic warning device notifies the transport ship 2 to execute an action of throwing a navigation anchor.
In one embodiment of the present invention, in step S5, the transport ship 2 slowly propels towards the platform body 1 by its own power and the traction force of the auxiliary anchor boat 5, the propelling speed is less than or equal to 0.5m/S, and when the transport ship 2 is 120 meters away from the platform body, the propelling speed is reduced to 0.25m/S until contacting with the buffer device 4, so as to realize berthing.
In one embodiment of the present invention, step S6 is specifically that cables 3 are respectively disposed at the fore and aft of the transport ship 2 far away from the platform main body 1, and the other ends of the cables 3 are connected to the bollards of the platform main body 1 and are tied firmly.
In a preferred embodiment of the present invention, the platform body 1 is provided with a mooring device for tightening the cable 3 in step S6, and the working torque of the mooring device is set to make the cable 3 have a constant tension, so as to improve the mooring firmness of the carrier 2 and the platform body 1.
In an embodiment of the present invention, step S7 further includes monitoring the elevation of the sea level during the lifting construction work, and maintaining the bottom of the platform body 1 submerged for 0.5-2 m by adjusting the height of the platform body 1 of the jack-up construction platform.
Compared with the prior art, the invention has the following beneficial effects:
(1) by adopting the self-elevating construction platform berthing construction method, the transformation cost (350-.
(2) By adopting the self-elevating construction platform berthing construction method, the risk of collision of the self-elevating construction platform is reduced, and the safety is greatly improved.
(3) By adopting the self-elevating construction platform berthing construction method, the four anchor positioning operation processes (3-5 hours) of a transport ship or a positioning barge are reduced, and the construction efficiency is improved.
Drawings
FIG. 1 is a schematic of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1:
as shown in fig. 1, a self-elevating construction platform berthing construction method includes the following steps:
s1: ballasting a self-elevating construction platform mat;
s2: the height of a platform main body 1 of the self-elevating construction platform is reduced;
s3: a buffer device 4 is arranged at one side of the platform main body 1, which is ready to receive the berthing of the transport ship 2;
s4: the carrier 2 is decelerated by throwing the sailing anchor;
s5: the transport ship 2 slowly approaches the platform main body 1 until contacting the buffer device 4 to realize berthing;
s6: a connecting structure is arranged between the transport ship 2 and the platform main body 1, so that the mooring is firm;
s7: the hoisting construction operation of the heavy objects on the transport ship 2 is carried out.
The self-elevating construction platform berthing construction method of claim 1, wherein the step S1 further comprises:
s11: lifting a platform main body 1 of the self-elevating construction platform to 5-6 meters from the sea level;
s12: and (3) compacting the seabed below each pile leg to reach the bearing capacity of 40-100 tons/square meter required by the design.
In one embodiment of the present invention, the platform body 1 is lowered to a position where its bottom is 1-2 m into the water in step S2.
In the preferred embodiment of the present invention, a water level sensor or a scale is provided on the side of the platform body 1, so as to rapidly and accurately obtain the water depth data of the platform body 1.
In one embodiment of the present invention, in step S3, the buffer device 4 is movably connected to the platform body 1, and the buffer device 4 floats on the sea level and is freely floating up and down according to the change of the sea level.
In a preferred embodiment of the present invention, the cushioning device 4 employs multiple sets of impact resistant air bags.
In one embodiment of the invention, in step S4, carrier vessel 2 throws a navigation anchor at a distance of 1100m-150m from the platform body.
In a preferred embodiment of the present invention, the platform body 1 is provided with a radar ranging device and an acousto-optic warning device, the radar ranging device is configured to obtain distance data between the transport ship 2 and the platform body 1, and when the transport ship 2 is 1100m to 150m away from the platform body, the acousto-optic warning device notifies the transport ship 2 to execute an action of throwing a navigation anchor.
In one embodiment of the present invention, in step S5, the transport ship 2 slowly propels towards the platform body 1 by its own power and the traction force of the auxiliary anchor boat 5, the propelling speed is less than or equal to 0.5m/S, and when the transport ship 2 is 120 meters away from the platform body, the propelling speed is reduced to 0.25m/S until contacting with the buffer device 4, so as to realize berthing.
In one embodiment of the present invention, step S6 is specifically that cables 3 are respectively disposed at the fore and aft of the transport ship 2 far away from the platform main body 1, and the other ends of the cables 3 are connected to the bollards of the platform main body 1 and are tied firmly.
In a preferred embodiment of the present invention, the platform body 1 is provided with a mooring device for tightening the cable 3 in step S6, and the working torque of the mooring device is set to make the cable 3 have a constant tension, so as to improve the mooring firmness of the carrier 2 and the platform body 1.
In an embodiment of the present invention, step S7 further includes monitoring the elevation of the sea level during the lifting construction work, and maintaining the bottom of the platform body 1 submerged for 0.5-2 m by adjusting the height of the platform body 1 of the jack-up construction platform.
The above-mentioned embodiments are merely descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art should fall into the protection scope of the present invention without departing from the design concept of the present invention, and the technical contents of the present invention as claimed are all described in the technical claims.
Claims (4)
1. A self-elevating construction platform berthing construction method is characterized by comprising the following steps: the method comprises the following steps:
s1: ballasting a self-elevating construction platform mat;
s2: the height of a platform main body (1) of the self-elevating construction platform is reduced, the height of the platform main body (1) is reduced to the position of 1-2 meters of water entering the bottom of the platform main body, and a water level sensor or a scale is arranged on the side surface of the platform main body, so that the water entering depth data of the platform main body can be rapidly and accurately acquired;
s3: a buffer device (4) is arranged on one side of the platform main body (1) to be berthed by the transport ship (2), the buffer device adopts a plurality of groups of anti-impact air bags, the buffer device is movably connected with the platform main body, and the buffer device floats on the sea level and freely floats up and down along with the change of the sea level;
s4: the transport ship (2) throws the navigation anchor to decelerate, and the transport ship (2) throws the navigation anchor at a position 100-150 m away from the platform main body (1);
s5: the transport ship (2) slowly approaches to the platform main body (1) until the transport ship is contacted with the buffer device (4), the transport ship (2) slowly propels towards the platform main body (1) by means of self power and traction force of the auxiliary anchor boat (5), the propelling speed of the transport ship is less than or equal to 0.5m/s, and when the transport ship (2) is 20 meters away from the platform main body (1), the propelling speed of the transport ship is reduced to 0.25m/s until the transport ship is contacted with the buffer device (4), so that berthing is realized;
s6: a connecting structure is arranged between the transport ship (2) and the platform main body (1) to ensure firm berthing;
s7: the hoisting construction operation of the heavy objects on the transport ship (2) is carried out.
2. The self-elevating construction platform berthing construction method of claim 1, wherein the step S1 further comprises:
s11: lifting a platform main body (1) of the self-elevating construction platform to 5-6 meters from the sea level;
s12: and (3) compacting the seabed below each pile leg to reach the bearing capacity of 40-100 tons/square meter required by the design.
3. The self-elevating construction platform berthing construction method of claim 1, characterized in that: step S6 is that mooring ropes (3) are arranged at the bow and stern of the transport ship (2) far away from the platform main body (1), and the other end of each mooring rope (3) is connected to a cable pile of the platform main body (1) and firmly tied.
4. The self-elevating construction platform berthing construction method of claim 1, characterized in that: step S7 also includes monitoring the sea level lifting condition during the lifting construction operation, and keeping the bottom of the platform main body (1) to enter water for 0.5-2 m by adjusting the height of the platform main body (1) of the self-elevating construction platform.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911180086.XA CN110904920B (en) | 2019-11-27 | 2019-11-27 | Self-elevating construction platform berthing construction method |
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| CN201911180086.XA CN110904920B (en) | 2019-11-27 | 2019-11-27 | Self-elevating construction platform berthing construction method |
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| CN110904920B true CN110904920B (en) | 2021-08-10 |
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| CN112278195B (en) * | 2020-10-23 | 2022-07-05 | 中船黄埔文冲船舶有限公司 | Mooring method of roll-on/roll-off ship |
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| CN109795643A (en) * | 2019-03-19 | 2019-05-24 | 江苏科技大学 | A kind of the air bag release and recyclable device and method of LNG filling ship |
| CN110203327A (en) * | 2019-05-31 | 2019-09-06 | 大连理工大学 | A kind of harbour is simultaneous to lean on ship mooring physical model test method |
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2019
- 2019-11-27 CN CN201911180086.XA patent/CN110904920B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4299183A (en) * | 1979-01-05 | 1981-11-10 | Texaco Inc. | Method for mooring a vessel to a pier or dock |
| US5970635A (en) * | 1998-01-29 | 1999-10-26 | Wilmoth; Daryl | Jet agitation dredging system |
| CN201092380Y (en) * | 2007-04-27 | 2008-07-30 | 中国海洋石油总公司 | Ship mooring facilities of marine oil-gas production platform |
| CN104032765A (en) * | 2014-07-01 | 2014-09-10 | 江苏龙源振华海洋工程有限公司 | Shallow sea wind power plant rock-socketed monopile foundation construction method |
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| CN105775042A (en) * | 2016-03-08 | 2016-07-20 | 上海船舶研究设计院 | Mooring arrangement structure of small LNG ship |
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| CN110203327A (en) * | 2019-05-31 | 2019-09-06 | 大连理工大学 | A kind of harbour is simultaneous to lean on ship mooring physical model test method |
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