Patent Application
20240218625
The present disclosure relates to a construction platform surrounded by water, in particular, to a rotating construction platform based on a monopile.
During the construction, equipment installation and maintenance of offshore structures, it is often necessary to carry out construction around a monopile. At present, there are usually two ways of offshore construction: using conventional temporary multi-pile platforms and using offshore construction vessels. If conventional temporary multi-pile platforms are used, there are usually two ways: one is to build a small temporary platform beside of the monopile, where the temporary platform is supported by multiple steel pipe piles with small diameters, this method requires continuous piling and disassembly of the platform to adjust the position of the temporary platform around the monopile to meet the construction needs; the other is to reserve a hole in the middle of a very large temporary platform and surround the entire monopile in the hole, in this method, the temporary platform is too large, and this method is technically and economically unreasonable. If offshore construction vessels are used, special offshore construction vessels (such as DCM mixing ships) can be used, or construction equipment can be installed on ships, that is, land-based construction machinery are installed and arranged on a barge or a self-elevating platform vessel. Special offshore construction vessels have high construction efficiency, but their size is generally large, their construction period is tight, and their equipment is expensive; in addition, upgrading a vessel generally requires that the relevant equipment be properly configured and fixed. Except for self-elevating platform vessels, other vessels need to be moved constantly by adjusting the length of anchor chain during offshore construction. During offshore construction, environmental factors such as current load, wave load, and sea wind need to be overcome, and it is not easy to control the quality of construction. For self-elevating platform vessels, it is needed to plug and unplug leg piles and adjust their positions, thus the work efficiency is low and the technical economy is unreasonable. Therefore, a new type of construction platform is needed to reduce construction difficulty, save construction time and costs.
Given the shortcomings of the prior art described above, the present disclosure aims to provide a rotating construction platform based on a monopile. A new design pattern is proposed to directly set the construction platform on the monopile, which saves construction time and costs, improves the continuity of construction operations, and ensures construction quality.
To realize the above purpose, the present disclosure provides a rotating construction platform based on a monopile, including a rotary connecting mechanism arranged on a top of the monopile and a working platform arranged on the rotary connecting mechanism. The rotary connecting mechanism includes an upper connecting tube, a lower connecting tube, and a rotary support structure located between the upper connecting tube and the lower connecting tube. The working platform is fixedly connected to the upper connecting tube, and the lower connecting tube is detachably fixed to the top of the monopile. At least one side of the working platform sticks out of a side of the monopile.
Further, the rotary connecting mechanism further includes a plurality of corbels fixedly connected to the upper connecting tube, and the working platform is fixedly connected to the plurality of corbels.
Further, a plurality of horizontal braces is fixedly arranged between the plurality of corbels and the upper connecting tube.
Further, a load-bearing system of the working platform includes a platform underframe. The platform underframe is fixedly connected with a plurality of short columns, each of the plurality of short columns is fixedly connected to one of the plurality of corbels of the rotary connecting mechanism.
Further, the platform underframe is rectangular and sticks out of one side or two sides of the monopile along a length direction. The platform underframe includes a plurality of main beams arranged along the length direction, a plurality of secondary beams arranged along a width direction, and each steel plate or grating installed on the main beam and the secondary beam. The plurality of short columns is fixedly connected with the plurality of main beams.
Further, the load-bearing system of the working platform further includes a vertical reinforcement structure fixedly connected with the platform underframe.
Further, the load-bearing system of the working platform including the platform underframe and the vertical reinforcement structure is a frame structure, a truss structure, a self-stressed arch system, or a cable-stayed structure.
Further, the rotary connecting mechanism further includes a rotary control system for controlling the rotation of the rotary support structure.
Further, a berthing and boarding structure is provided at a side of the working platform.
Further, the working platform includes a plurality of guardrails and a plurality of wheel guard sills installed on the platform underframe.
As described above, the rotating construction platform involved in the present disclosure has the following beneficial effects:
By setting up a rotary connecting mechanism on the top of a monopile and a working platform on the rotary connecting mechanism, a new design pattern is provided to set up the rotating construction platform on the monopile, that is, to use the monopile as a structural support without additional piles. By setting up the rotary connecting mechanism with a rotation function to drive the working platform to rotate, the overall size of the working platform can be effectively reduced under the premise of achieving the same construction scope, which brings convenience to construction. The rotating construction platform of the present disclosure is stable and reliable. It can replace the original method that requires offshore construction vessels or conventional temporary platforms, reduce adverse effects such as tide level, waves and water current in marine environments, improve the continuity of construction operations, save construction time and costs, avoid vessel machinery from hitting the monopile due to waves when the construction space is small, improve construction positioning accuracy, and ensure construction quality.
The embodiments of the present disclosure will be described below through specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present disclosure according to the contents disclosed by the specification.
It should be understood that the structures, proportions, sizes, and the like, which are illustrated in the drawings of the present specification, are used to clarify the contents disclosed in the specification for understanding and reading by those skilled, and are not intended to limit the implementation of the present disclosure, thus are not technically meaningful. Any modification of the structure, change of the scale, or adjustment of the size should still fall within the scope of the technical contents disclosed by the present disclosure without affecting the effects and achievable objectives of the present disclosure. In the meantime, the terms “upper”, “lower”, “left”, “right”, “intermediate” as used in this specification are also for the convenience of description, and are not intended to limit the scope of the present disclosure, and the change or adjustment of the relative relationship is considered to be within the scope of the present disclosure without substantial changes in technology.
Please refer to
As the diameter of the offshore monopile 1 increases, the area of the pile top increases, and the bearing capacity of the monopile 1 is enhanced with sufficient rigidity. Some construction machinery (such as high-pressure rotary jet drilling machines and cement grouting machines) have small size, low self-weight, and construction load. Therefore, it is feasible to arrange a rotating construction platform on the pile top of a monopile 1.
The rotating construction platform involved in the present disclosure adopts a new design pattern, which sets the rotating construction platform on the monopile 1. That is, the monopile 1 is used as the structural support, and there is no need to use additional piles. By setting the rotary connecting mechanism 2 with a rotation function, the upper connecting tube 22 rotates relative to the lower connecting tube 21 through the rotary support structure 23, thereby driving the working platform 3 to rotate. The working platform 3 can rotate according to actual construction needs. Therefore, the working platform 3 only needs to stick a long distance in one direction (referred to as the length direction) from the monopile 1, while the size of the width is small. The working platform 3 can be moved to the position where construction is needed by rotating, which is flexible and can effectively reduce the overall size of the working platform 3 under the condition of achieving the same construction range, thus bringing convenience to construction. The rotating construction platform of the present disclosure is stable and reliable and can replace the original method of using offshore construction vessels or temporary construction platforms, reduce adverse effects such as tide level, waves and water current in marine environments, improve the continuity of construction operations, save construction time and costs, avoid vessel machinery from hitting the monopile 1 due to waves when the construction space is small, improve construction positioning accuracy, and ensure construction quality.
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In the present disclosure, life-saving and escape facilities are also provided on the working platform 3, and necessary sunshade, rainproof and windproof facilities are provided. The working platform 3 is also equipped with basic lightning protection facilities.
As a preferred design, as shown in
In the present disclosure, the lower connecting tube 21 of the rotary connecting mechanism 2 is fixedly connected to the monopile by bolts, such that the rotating construction platform can be flexibly removed from the monopile 1 and can be reused without affecting the subsequent use of the monopile 1.
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The rotating construction platform of the present disclosure uses the top of the monopile 1 as a supporting foundation. With the increase of the diameter of the offshore monopile, the area of the pile top increases, which has sufficient rigidity and enhances the bearing capacity of the monopile. It can support a rotating platform stably and reliably. Through this rotating construction platform, construction around the monopile 1 can be effectively completed, such as pile foundation reinforcement (such as replacement method, high-pressure rotary spraying method, cement mixing method). It can replace the original method that requires offshore construction vessels or conventional temporary multi-pile platforms, reduce adverse effects such as tide level, waves and water current in marine environments, improve the continuity of construction operations, save construction time and costs, avoid vessel machinery from hitting the monopile 1 due to waves when the construction space is small, improve construction positioning accuracy and ensure construction quality. The rotating construction platform reduces the size of the platform under the premise of achieving the same construction scope, which brings convenience to construction and has practical engineering significance.
The rotating construction platform of the present disclosure can also be used for construction of anti-scouring facilities around the pile (sand quilt placement, stone throwing around the pile, artificial block throwing around the pile, solidified soil anti-scouring layer), installation of auxiliary facilities, anti-corrosion coating repair and other constructions. It can also be used as a temporary surveying, observation, and testing platform. In addition to being applied to offshore monopiles, based on the same or similar principles, it can also be applied to monopiles in water bodies such as lakes and rivers.
In summary, the present disclosure effectively overcomes various disadvantages of the traditional technology and has high industrial application values.
The above-mentioned embodiments are just used for exemplarily describing the principle and effects of the present disclosure instead of limiting the present disclosure.
Those skilled in the art can make modifications or changes to the above-mentioned embodiments without going against the spirit and the range of the present disclosure. Therefore, all equivalent modifications or changes made by those who have common knowledge in the art without departing from the spirit and technical concept disclosed by the present disclosure shall be still covered by the claims of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202110484772.7 | Apr 2021 | CN | national |
| 202120946072.0 | Apr 2021 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2021/113820 | 8/20/2021 | WO |
