CN212248337U - Suction bucket-pile foundation composite structure applied to offshore electrical platform - Google Patents
Suction bucket-pile foundation composite structure applied to offshore electrical platform Download PDFInfo
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- CN212248337U CN212248337U CN201922183650.5U CN201922183650U CN212248337U CN 212248337 U CN212248337 U CN 212248337U CN 201922183650 U CN201922183650 U CN 201922183650U CN 212248337 U CN212248337 U CN 212248337U
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Abstract
The utility model provides a suction bucket-pile composite foundation structure applied to an offshore electrical platform, which comprises an upper force transmission component, a jacket, a pile foundation and a suction bucket foundation; the upper force transmission component comprises a support platform and a support arm, the support arm is welded with the support platform, and an upper module of the offshore electric platform is welded or connected with the support arm through a bolt; the top of the jacket is welded with the supporting platform, and force is transferred through the tubular joint of the jacket; the lower end of the jacket is welded with the top of the suction bucket foundation; the pile foundation penetrates through the supporting platform and the jacket foundation; the middle part of the top cover of the suction bucket foundation is provided with a circumferential reinforcing rib plate; the pile foundation is a single pile foundation; the pile foundation is connected with the supporting platform and the jacket by utilizing the hoop; the top of the suction bucket foundation is connected with the water-gas pipeline. The offshore construction operation time is greatly reduced, the piling and positioning precision is improved, and a new idea is provided for the offshore electric platform foundation structure and the offshore electric platform foundation construction method.
Description
Technical Field
The utility model relates to an ocean engineering field especially relates to a be applied to offshore electric platform's suction bucket-pile foundation composite construction, is applicable to offshore wind power generation technical field.
Background
In recent years, many countries internationally have developed and utilized offshore wind power resources as important directions for wind power development. Compared with onshore wind power, offshore wind power has the advantages of stable wind resources, long power generation life, no worry of abandoning light and limiting power, no obstruction, close distance from coastal areas with dense population and the like. China has the coastline as long as 1.8 km, has the natural advantages of developing offshore wind power, and has abundant coastal wind energy resource reserves. Although the development and the start of offshore wind energy resources are late in China, the development momentum is rapid, the prospect is wide, and the development of offshore wind power becomes an important step for developing the offshore resources in China.
In order to ensure effective transmission of electric energy, electric platforms such as offshore booster stations or converter stations are usually arranged in offshore wind power plants to boost the electric energy generated by wind power to 110kV (220kV) voltage or convert the electric energy into direct current, and then the electric energy is transmitted to onshore transformer substations through submarine cables. As an electric energy collection center of an offshore wind farm, an offshore large-scale electric platform is a key facility for power transmission and transformation and is the core of the whole offshore wind farm. Taking an offshore booster station as an example, the upper module is integrally and compactly arranged, and the internal arrangement comprises a heating and ventilation machine room, a fire pump room, escape and lifesaving facilities, a main transformer room, a GIS room, a switch cabinet room communication relay storage battery room, an emergency power distribution room, a central control room, a spare part room and the like. At home and abroad offshore electrical platforms mostly adopt a jacket and a pile foundation, and the conventional construction process is as follows: processing and manufacturing a steel structure → installing electrical equipment → sinking a jacket foundation → grouting construction → integrally hoisting an upper block → welding and grouting the upper block and the jacket, and the like.
At present, the offshore electric platform foundation structure and the construction method thereof have the following problems: 1) the offshore construction period is long, but the construction window period is short; 2) the jacket foundation is more than 4 piles, so that the piling cost is high; 3) complex sea conditions, poor pile driving construction precision and the like. In order to improve the construction efficiency of the offshore electrical platform and reduce the cost, an offshore electrical platform foundation structure which is economical, reasonable, simple and easy to implement and high in reliability needs to be provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above problem, a be applied to marine electrical platform's suction bucket-stake composite foundation structure is proposed. The composite foundation form reasonably combines a shallow foundation (a suction bucket) and a deep foundation (a pile foundation), and fully exerts the vertical bearing capacity of the suction bucket foundation and the lateral bearing capacity of the pile foundation. The foundation form greatly reduces the operation time of offshore construction and improves the piling and positioning precision.
The utility model adopts the technical proposal that:
a suction bucket-pile foundation composite structure applied to an offshore electrical platform is characterized by comprising an upper force transmission component, a jacket, a pile foundation and a suction bucket foundation; the upper force transmission component comprises a support platform and a support arm, the support arm is welded with the support platform, and an upper block of the offshore electric platform is welded or bolted with the support arm; the top of the jacket is welded with the supporting platform, and force is transferred through the tubular joint of the jacket; the lower end of the jacket is welded with the top of the suction bucket foundation; the pile foundation penetrates through the supporting platform and the jacket foundation; the middle part of the top cover of the suction bucket foundation is provided with a circumferential reinforcing rib plate; the pile foundation is a single pile foundation; the pile foundation is connected with the supporting platform and the jacket by utilizing the hoop; the top of the suction bucket foundation is connected with the water-gas pipeline.
Further, the pile foundation passes through the support platform and the jacket; the hoop diameter of the hoop is adjustable, the hoop diameter is larger than the diameter of the pile foundation during pile driving, the horizontal position of the pile foundation is limited, the pile driving guiding effect is achieved, after pile driving is achieved, the hoop diameter is adjusted to be tightly connected with the pile foundation, an integral structure of the pile foundation, a supporting platform and a guide pipe frame is formed, and load is effectively transmitted to the pile foundation, the guide pipe frame and the suction bucket foundation through connection of a supporting arm and the supporting platform, connection of the supporting platform and the guide pipe frame and connection of the guide pipe frame and the suction bucket foundation.
Further, the pile foundation and the jacket form a whole through the supporting arms and the platform, and the pile foundation and the jacket jointly bear horizontal and vertical load.
Further, the anchor ear is connected with the supporting platform or the jacket through a ropeable rod.
Furthermore, a water and gas pipeline is arranged at the top of the suction bucket foundation, and water and gas in the suction bucket foundation are extracted to adjust the levelness of the whole structure.
Furthermore, the upper force transmission component, the jacket and the suction bucket foundation are prefabricated on the land, placed at a designated sea area position through hoisting equipment, and sunk to a designated depth by combining self weight and negative pressure.
Furthermore, the pile foundation is hoisted to penetrate through the supporting platform and the hoop and other devices, pile driving is only needed to be carried out once to complete installation of the pile foundation, and the hoop is locked and fixed to complete installation of the foundation structure.
Furthermore, the suction bucket foundation and the pile foundation are subjected to effective anti-scouring measures at the mud surface, such as riprap protection, sand quilt protection and the like.
Furthermore, a rubber protection pad is arranged between the pile foundation and the supporting platform, so that the problem of pile foundation clamping during pile driving is solved.
The above technical solutions and technical means of the present invention can also be used in combination.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the advantages of horizontal bearing capacity of the pile foundation and vertical bearing capacity of the suction bucket foundation are fully exerted, the load of the upper structure is effectively transmitted to the foundation, and the safety and the reliability are ensured; (2) reduce the pile number of times, reduce pile foundation quantity, make full use of suction bucket foundation negative pressure and the fast characteristics of dead weight sinking construction speed effectively improve the efficiency of construction and reduce the working costs. (3) Improve the pile precision, the later stage is demolishd the convenience. The utility model discloses structural style is reasonable, and the atress system is clear and definite, and the construction is convenient, and effective reduce cost has good popularization application prospect.
Drawings
Fig. 1 is a front view of the suction bucket-pile composite foundation structure applied to an offshore electrical platform of the present invention.
Fig. 2 is a top view of the utility model discloses a be applied to marine electric platform's suction bucket-stake composite foundation structure.
Fig. 3 is a schematic view of a middle hoop of a jacket of a suction bucket-pile composite foundation structure applied to an offshore electrical platform of the present invention.
Fig. 4 is a schematic view of a suction bucket foundation of the suction bucket-pile composite foundation structure applied to an offshore electrical platform.
Fig. 5 is a schematic diagram of the suction bucket foundation of the suction bucket-pile composite foundation structure and the upper block of the offshore electrical platform, which are applied to the offshore electrical platform.
Detailed Description
To further explain the contents, features and effects of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings:
(1) as shown in fig. 1 to 4, the present embodiment discloses a suction bucket-pile foundation composite structure applied to an offshore electrical platform, which includes a suction bucket foundation 1, a reinforcing rib plate 2, a pile foundation 3, a jacket pile leg 4, a support platform 5, a support arm 6, a connection support 7, an inclined support rod 8, a transverse telescopic rod 9, an anchor ear 10, a water gas pipeline 11 and a reversed bracket 12. Set up 4 suction bucket foundations 1 in this embodiment, suction bucket foundation 1 is the top closed, the open cask form steel construction basis in bottom, diameter 8m, barrel height 10m, the wall thickness 30mm, barrel top cover thickness 60mm, utilizes aqueous vapor pipeline 11 suction bucket foundation 1 inside aqueous vapor, aqueous vapor pipeline 11 sets up inside jacket spud leg 4 to link to each other with the last evacuating device of installation ship. 8 reinforcing rib plates 2 are arranged at the top of the suction bucket foundation 1, and the reinforcing rib plates 2 are used for connecting jacket spud legs 4, so that the upper load transmitted by the spud legs is more uniformly applied to the top of the suction bucket foundation 1. The jacket spud legs 4 are connected with the supporting platform 5, the inclined supports 8 and the transverse telescopic rods 9 to play a role in load transfer. The hoop 10 is arranged at the end part of the transverse telescopic rod 9, encircles the pile foundation 3 and is locked and fixed through a bolt device. The supporting platform 5, the supporting arm 6 and the connecting member 7 are connected together in sequence to play a role in supporting the upper module of the offshore electric platform.
(2) The suction bucket foundation 1, the reinforcing rib plates 2, the jacket pile legs 4, the supporting platform 5, the supporting arms 6, the connecting supports 7, the inclined supporting rods 8, the transverse telescopic rods 9, the hoops 10 and the water-gas pipelines 11 can be assembled on land, and after the installation ship is dragged to a designated position of a wind power plant, the assembled structure is lifted by the floating crane and is gradually placed into water until the suction bucket foundation 1 falls on the underwater seabed mud surface.
(3) The assembly structure firstly sinks through the self weight, a closed space is formed in a cavity of the suction bucket foundation 1, after the self weight sinks, the suction equipment on the installation ship is connected through the water-gas pipeline 11 to suck the water in the closed space of the suction bucket foundation 1, and the suction bucket foundation 1 further sinks under the action of the pressure difference between the upper surface and the lower surface of the bucket top until the preset depth is reached. In the process, the levelness of the supporting platform 5 is adjusted by adjusting the suction negative pressure extracted by the different suction bucket foundations 1.
(4) The pile foundation 3 penetrates through the supporting platform 5 and the anchor ear 10 by using the floating crane, then is sunk into the mud surface of the seabed by self weight, the pile foundation 3 is laterally restrained by using the transverse telescopic rods 9 and the anchor ear 10 at the upper, middle and lower positions, the verticality of the pile foundation 3 is ensured, and the pile foundation 3 is driven by using the pile driving ship until the preset depth is reached. During construction care is taken to protect the support platform 5, the support arm 6 and the connecting support 7.
(5) The supporting platform, the middle part and the lower part of the horizontal telescopic rod 9 are adjusted to lock and fix the hoop 10, and the pile foundation 3, the jacket 4 and the supporting platform 5 form a whole. Inverted brackets 12 are welded between the upper, middle and lower parts of the pile foundation 3 and the anchor ears 10.
(6) And after the installation is finished, hoisting the upper block of the offshore electric platform, laying a cable, accessing an electric system and the like.
And (3) in the self-weight sinking and negative pressure sinking processes of the structure in the step (3), arranging a level gauge at the top of the supporting platform, monitoring the process in real time, and adjusting the suction negative pressure condition of the suction bucket foundation to keep the supporting platform horizontal.
In the step (4), the pile foundation vertically penetrates through three anchor ears, the anchor ear range is larger than the diameter of the pile, and the anchor ear range is reduced after the pile foundation is in place, so that the verticality of the pile foundation is ensured; care was taken to protect the support platform and support arms during pile driving.
The utility model discloses well suction bucket foundation, jacket structure, supporting platform and support arm isotructure all can wholly assemble the completion on land, and suction bucket foundation sinks to take one's place through dead weight and negative pressure, only need carry out once to pile and accomplish pile foundation installation, and locking is fixed the staple bolt can accomplish the foundation structure installation. The utility model discloses structure safe and reliable, it is convenient to be under construction, very is fit for the foundation structure form as offshore electric platform.
The above embodiments are merely preferred technical solutions of the present invention, and it should be understood by those skilled in the art that modifications or substitutions of technical solutions or parameters in the embodiments can be made without departing from the principles and essential conditions of the present invention, and all the modifications or substitutions should be covered within the protection scope of the present invention.
Claims (7)
1. A suction bucket-pile foundation composite structure applied to an offshore electrical platform is characterized by comprising an upper force transmission component, a jacket, a pile foundation and a suction bucket foundation; the upper force transmission component comprises a support platform and a support arm, the support arm is welded with the support platform, and an upper block of the offshore electric platform is welded or bolted with the support arm; the top of the jacket is welded with the supporting platform, and force is transferred through the tubular joint of the jacket; the lower end of the jacket is welded with the top of the suction bucket foundation; the pile foundation penetrates through the supporting platform and the jacket foundation; the middle part of the top cover of the suction bucket foundation is provided with a circumferential reinforcing rib plate; the pile foundation is a single pile foundation; the pile foundation is connected with the supporting platform and the jacket by utilizing the hoop; the top of the suction bucket foundation is connected with a water-gas pipeline.
2. The suction bucket-pile foundation composite structure for offshore electrical platforms as set forth in claim 1, wherein: the pile foundation penetrates through the supporting platform and the jacket; the hoop diameter of the hoop is adjustable, the hoop diameter is larger than the diameter of the pile foundation during pile driving, the horizontal position of the pile foundation is limited, the pile driving guiding effect is achieved, after pile driving is achieved, the hoop diameter is adjusted to be tightly connected with the pile foundation, an integral structure of the pile foundation, a supporting platform and a guide pipe frame is formed, and load is effectively transmitted to the pile foundation, the guide pipe frame and the suction bucket foundation through connection of a supporting arm and the supporting platform, connection of the supporting platform and the guide pipe frame and connection of the guide pipe frame and the suction bucket foundation.
3. The suction bucket-pile foundation composite structure for offshore electrical platforms as set forth in claim 1, wherein: the pile foundation and the jacket form a whole through the supporting arms and the platform, and the pile foundation and the jacket share the horizontal and vertical load effects.
4. The suction bucket-pile foundation composite structure for offshore electrical platforms as set forth in claim 1, wherein: the anchor ear is connected with the supporting platform or the jacket through a rope pole.
5. The suction bucket-pile foundation composite structure for offshore electrical platforms as set forth in claim 1, wherein: and a water-gas pipeline is arranged at the top of the suction bucket foundation, and water gas in the suction bucket foundation is extracted to adjust the levelness of the whole structure.
6. The suction bucket-pile foundation composite structure for offshore electrical platforms as set forth in claim 1, wherein: the upper force transmission component, the jacket and the suction bucket foundation are prefabricated on land, placed at a designated sea area position through hoisting equipment and combined with self-weight sinking and negative pressure sinking to a designated depth.
7. The suction bucket-pile foundation composite structure for offshore electrical platforms as set forth in claim 1, wherein: hoisting the pile foundation to pass through the supporting platform and the hoop and other devices, only one-time piling is needed to complete the installation of the pile foundation, and the hoop is locked and fixed to complete the installation of the foundation structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922183650.5U CN212248337U (en) | 2019-12-09 | 2019-12-09 | Suction bucket-pile foundation composite structure applied to offshore electrical platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922183650.5U CN212248337U (en) | 2019-12-09 | 2019-12-09 | Suction bucket-pile foundation composite structure applied to offshore electrical platform |
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| Publication Number | Publication Date |
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| CN212248337U true CN212248337U (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922183650.5U Active CN212248337U (en) | 2019-12-09 | 2019-12-09 | Suction bucket-pile foundation composite structure applied to offshore electrical platform |
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