CN110949615B - Floating pile-stabilizing platform device based on anchoring positioning control and pile sinking method - Google Patents

Floating pile-stabilizing platform device based on anchoring positioning control and pile sinking method Download PDF

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CN110949615B
CN110949615B CN201911119207.XA CN201911119207A CN110949615B CN 110949615 B CN110949615 B CN 110949615B CN 201911119207 A CN201911119207 A CN 201911119207A CN 110949615 B CN110949615 B CN 110949615B
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pile
platform
floating
diameter single
anchor chain
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CN110949615A (en
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沈侃敏
何奔
李涛
姜贞强
王滨
梁宁
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PowerChina Huadong Engineering Corp Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/50Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B43/00Improving safety of vessels, e.g. damage control, not otherwise provided for
    • B63B43/02Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking
    • B63B43/04Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving stability
    • B63B43/06Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving stability using ballast tanks
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D13/00Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
    • E02D13/04Guide devices; Guide frames
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D13/00Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
    • E02D13/06Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers for observation while placing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/50Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
    • B63B2021/505Methods for installation or mooring of floating offshore platforms on site

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  • Engineering & Computer Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Mining & Mineral Resources (AREA)
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  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)

Abstract

The invention belongs to the technical field related to ocean engineering construction, and particularly relates to a floating pile stabilizing platform device based on anchoring positioning control and a pile sinking method. The hydraulic anchor machine winches the anchor chain, so that huge horizontal counter force can be provided for the centralization of a large-diameter single pile, and the direction is easy to control and dynamically adjust, so that the effect of active control is achieved, and the passive control of the traditional fixed pile-stabilizing platform is overcome; the floating platform moves through towing and is positioned by the anchoring system, and compared with a fixed platform, the floating platform needs to be driven into a positioning pile, so that the offshore operation has stronger maneuverability; the floating platform is suitable for various water depths, the draft of the floating platform can be changed by adjusting the ballast water amount in the buoy under different working conditions, and the floating platform has better stability particularly in deep sea areas and ensures the safety of offshore construction.

Description

Floating pile-stabilizing platform device based on anchoring positioning control and pile sinking method
Technical Field
The invention belongs to the technical field related to ocean engineering construction, and particularly relates to a floating pile stabilizing platform device based on anchoring positioning control and a pile sinking method.
Background
China is currently in a large-scale development and construction stage of offshore wind power plants, the offshore wind power plants gradually develop from offshore sea areas to deep open sea, and the power of wind turbine units and the diameters of corresponding large-diameter single piles are continuously increased. The pile stabilizing and positioning platform is commonly used for controlling the verticality in the pile sinking construction process and has certain deviation rectifying capability. In the construction process, firstly, a hoisting machine lifts a large-diameter single pile to a mounting position, a pile embracing frame penetrating through a pile stabilizing platform is lowered, then a pile body is sunk into a seabed by a pile driving hammer, and meanwhile, the perpendicularity of the pile body is ensured by the pile stabilizing platform. The traditional fixed pile stabilizing and positioning platform mostly adopts four positioning piles to be fixed on the sea level, the length of the positioning piles is further increased in a deep sea area, the stability of the pile stabilizing platform is insufficient, enough horizontal reaction force cannot be provided in the construction process for pile sinking rectification, and meanwhile, the overturning danger exists; in addition, a large amount of operation time is consumed for inserting and pulling out the positioning pile of the pile stabilizing platform, so that the maneuverability of pile sinking operation is insufficient, the requirement on the window period of offshore operation is high, and the working efficiency is low. Therefore, the structure and the process of the pile stabilizing platform for traditional pile sinking construction are improved, and the method has important engineering practical significance for large-scale development of deep sea wind power plants in China.
Disclosure of Invention
A first object of the present invention is to provide a floating pile-stabilizing platform based on anchoring and positioning control, which addresses the above-mentioned problems.
For this reason, the above object of the present invention is achieved by the following technical solutions:
a floating pile-stabilizing platform device based on anchoring positioning control comprises a pile holding frame, a floating platform, an anchoring system and a monitoring system;
the pile embracing frame is used for fixing large-diameter single piles in the construction process, the pile embracing frame is a steel structure truss, the pile embracing frame is provided with a hoop and a jack, the pile embracing frame and the hoop are arranged to be matched with the outer diameter of a pile body of the large-diameter single pile so as to ensure that the upper end of the pile body of the large-diameter single pile in the construction process is in cooperative motion with the floating type platform, the lower part of the pile embracing frame is fixed on a platform deck of the floating type platform, the inner side of the pile embracing frame is hollow to form a pile feeding port, and a plurality of flexible hoops and corresponding jacks are arranged on the inner side of the pile embracing frame so as to adapt to the;
the floating platform comprises: the floating type platform is used for fixing and transporting a pile holding frame and a large-diameter single pile, a moon pool for the large-diameter single pile to penetrate through is arranged in the center of the platform deck, the floating drum for providing buoyancy for the floating type platform is arranged below the platform deck, and the support rod is used for connecting and fixing the floating drum to ensure the structural safety under the horizontal deviation rectifying force;
the mooring system comprises: the anchoring system is used for positioning the floating platform and providing horizontal counter force required for adjusting the verticality of the large-diameter single-pile body; the upper end of the anchor chain is connected with an anchor machine, the middle of the anchor chain is adjusted, fixed and lowered to the seabed through a cable guide device, the lower end of the anchor chain is connected with an anchor body, the anchor machine is controlled hydraulically, and the tensioning and loosening of the anchor chain are controlled through a winch, so that the tension of the anchor chain is changed to adjust the displacement of the floating platform and the large-diameter single pile inside the floating platform;
the monitoring system includes: the device comprises an inclinometer, a laser inclinometer and a data acquisition instrument, wherein the inclinometer is arranged on the outer side of a large-diameter single pile and used for monitoring the verticality of a large-diameter single pile body in the pile sinking process, the laser inclinometer is arranged on a pile holding frame and used for monitoring the relative inclination angle between the pile holding frame and the large-diameter single pile body, and the data acquisition instrument is used for acquiring the inclinometer, the data acquired by the laser inclinometer and the twisting tension data of each anchor machine.
While adopting the technical scheme, the invention can also adopt or combine the following technical scheme:
as a preferred technical scheme of the invention: and a ballast tank and a ballast water pump are arranged in the buoy so as to adjust the draft of the floating platform and the elevation of a platform deck under different working conditions.
As a preferred technical scheme of the invention: and the data acquisition instrument is connected with the remote transmission data acquisition instrument so as to realize remote monitoring control of the pile stabilizing and sinking process.
It is still another object of the present invention to provide a pile sinking method for a floating pile-stabilized platform apparatus based on anchoring and positioning control, which overcomes the disadvantages of the prior art.
For this reason, the above object of the present invention is achieved by the following technical solutions:
a pile sinking method for a floating pile-stabilized platform apparatus based on anchoring and positioning control, which is based on the floating pile-stabilized platform apparatus based on anchoring and positioning control described above, and comprises the following steps: firstly, vertically lifting a large-diameter single pile by using a ship lifting machine, penetrating through a moon pool at the center of a pile holding frame and the center of a platform deck from top to bottom, and then sinking to a sea bed surface, after the pile body of the large-diameter single pile is self-stabilized, jacking an anchor ear in a horizontal plane by using a jack on the pile holding frame until the anchor ear is connected with the pile body of the large-diameter single pile, so that the large-diameter single pile and the floating platform are relatively fixed; then arranging a hammering or static pressure pile sinking device at the top end of the pile body of the large-diameter single pile to start pile sinking construction; in the pile sinking construction process, the inclination condition of the large-diameter single pile is monitored through an inclinometer arranged on the outer side of the large-diameter single pile and a laser inclinometer arranged on a pile embracing frame, when the pile body of the large-diameter single pile inclines to one side, the anchor chain length is adjusted by using an anchor machine, the anchor chain on the side is loosened, the tension of the anchor chain on the side is reduced, the anchor chain on the other side is tightened to increase the tension, so that the pile body of the large-diameter single pile inclines to the opposite direction, and the perpendicularity of the pile body of the large-diameter single pile in the whole pile sinking construction process can be ensured; the laser inclinometer is used for monitoring the relative inclination angle between the pile holding frame and the pile body of the large-diameter single pile, and acquiring data acquired by the inclinometer and the laser inclinometer and the twisting tension data of each anchor machine through the data acquisition instrument; a floating cylinder for providing buoyancy for the floating platform is arranged below the platform deck;
while adopting the technical scheme, the invention can also adopt or combine the following technical scheme:
as a preferred technical scheme of the invention: and a ballast tank and a ballast water pump are arranged in the buoy so as to adjust the draft of the floating platform and the elevation of a platform deck under different working conditions.
As a preferred technical scheme of the invention: and the data acquisition instrument is connected with the remote transmission data acquisition instrument so as to realize remote monitoring control of the pile stabilizing and sinking process.
As a preferred technical scheme of the invention: according to the catenary equation theory, the horizontal reaction force H provided by a single anchor chain can be defined as:
Figure GDA0002603477770000031
Figure GDA0002603477770000041
V=wL (3)
Figure GDA0002603477770000042
wherein: l is the length of the anchor chain, w is the unit length buoyancy of the anchor chain, AE represents the unit length rigidity of the anchor chain, X is the horizontal distance between the cable guide and the seabed touchdown point, V is the buoyancy of the anchor chain, and T is the anchor chain tension at the cable guide position, so that the anchor chain is stranded and pulled through the anchor machine, the length L is reduced, and the horizontal counter force H is correspondingly increased; in a similar way, the anchor chain is loosened, the length L is increased, and the horizontal counter force H is correspondingly reduced.
The invention provides a floating pile-stabilizing platform device based on anchoring positioning control and a pile sinking method, which have the following beneficial effects:
(1) the hydraulic anchor machine winches the anchor chain, so that huge horizontal counter force can be provided for the centralization of the large-diameter single pile, and the direction is easy to control, so that the effect of active control is achieved, and the passive control of the traditional fixed pile-stabilizing platform is overcome;
(2) the floating platform moves through towing and is positioned by the anchoring system, and compared with a fixed platform, the floating platform needs to be driven into a positioning pile, so that the offshore operation has stronger maneuverability;
(3) the floating platform is suitable for various water depths, the draft of the floating platform can be changed by adjusting the ballast water amount in the buoy under different working conditions, and the floating platform has better stability particularly in deep sea areas and ensures the safety of offshore construction.
Drawings
FIG. 1 is a general layout view of a floating pile-stabilized platform based on mooring positioning control according to the present invention;
FIG. 2 is a front view of a floating pile-stabilizing platform based on mooring positioning control according to the present invention;
FIG. 3 is a top view of a floating pile-stabilized platform based on mooring positioning control according to the present invention;
FIG. 4 is a layout of a monitoring system;
FIG. 5 is a layout of the mooring system;
in the figure: 1-pile holding frame; 2-hoop holding; 3-a jack; 4-large diameter single pile; 5, a pile hammer; 6-platform deck; 7-an anchor machine; 8-an anchor chain; 9-a cable guide; 10-an anchor body; 11-a buoy; 12-ballast tank; 13-a ballast pump; 14-a strut; 15-an inclinometer; 16-laser inclinometer; 17-data acquisition instrument.
Detailed Description
The invention is described in further detail with reference to the figures and specific embodiments.
The embodiment is used for controlling the verticality of the large-diameter single pile in the pile sinking construction process, and is shown in figures 1-5. The large-diameter single pile 4 is lifted and lowered down, and the pile bottom of the large-diameter single pile is sunk below the surface of the sea bed from top to bottom through a moon pool which embraces the inner space of the pile frame 1 and the center of the platform deck 6, so that the arrangement before pile sinking is completed. When pile sinking construction is carried out, a hydraulic or static pressure pile driving hammer 5 is installed at the top of the large-diameter single pile 4, and the large-diameter single pile 4 is gradually hammered to sink into the seabed. The verticality and the inclination of the large-diameter single pile 4 pile body are monitored in real time through an inclinometer 15 and an inclinometer 16 which are arranged on the large-diameter single pile 4 pile body.
According to the catenary equation theory, the horizontal reaction force H provided by a single anchor chain can be described as:
Figure GDA0002603477770000051
Figure GDA0002603477770000052
V=wL (3)
Figure GDA0002603477770000053
wherein: l is the length of the anchor chain, w is the unit length buoyancy of the anchor chain, AE represents the unit length rigidity of the anchor chain, X is the horizontal distance between the cable guide and the seabed touchdown point, V is the buoyancy of the anchor chain, and T is the anchor chain tension at the cable guide position, so that the anchor chain is stranded and pulled through the anchor machine, the length L is reduced, and the horizontal counter force H is correspondingly increased; in a similar way, the anchor chain is loosened, the length L is increased, and the horizontal counter force H is correspondingly reduced.
When the inclination meter 15 and the inclinometer 16 measure that the large-diameter single pile 4 inclines to one side in the construction process, horizontal counter force can be applied through twisting and pulling of the anchor machine 7, the floating platform is enabled to translate in the opposite direction, and the perpendicularity of the large-diameter single pile 4 is adjusted through the pile holding frame 1. For example, when the large-diameter single pile 4 inclines to the northwest side, the anchor machine 7-1 on the northwest side is controlled to loosen the anchor chain 8-1, and the horizontal counter force of the anchor chain on the northwest side is reduced; and meanwhile, the anchor machine 7-3 on the south-east side is controlled to wink and pull the anchor chain 8-3, and the horizontal counter force on the south-east side is increased, so that the pile stabilizing platform drives the pile body of the large-diameter single pile to deviate towards the south-east side, and the effect of adjusting the verticality is achieved. After pile sinking construction is finished, ballast water in a ballast tank 12 is removed by a ballast pump 13, a platform deck 6 of the floating type stable pile is lifted to be above the top end of the large-diameter single pile 4, and the floating type stable pile is dispatched to the next construction position for operation through towing.
Embrace pile frame 1 and be space steel truss structure, the lower extreme is fixed in the platform deck 6 of steady pile platform, and 4 layers of staple bolts have been arranged along the vertical direction to steel truss structure space inboard, and every layer includes flexible construction staple bolt section of jurisdiction and corresponds jack 3, for regular octagon central symmetry arrangement, the space that staple bolt 2 formed and the external diameter phase-match of major diameter single pile, and have the regulating power of certain limit. When the pile stabilizing platform works, the anchor ear 2 is connected with the outer side of the large-diameter single pile 4 through the horizontal jacking jack 3, and the pile body of the fixed large-diameter single pile and the pile stabilizing platform move together.
The floating platform comprises a platform deck 6, a buoy 11 and a support rod 14, wherein a pile holding frame 1 and an anchor machine 7 are fixed on the platform deck 6, and the platform deck 6 is hollow to form a moon pool serving as a pile feeding port. A ballast tank 12 and a ballast pump 13 are arranged in the buoy 11, and the draft and the platform deck elevation of the pile-stabilizing platform can be changed by adjusting the capacity of ballast water so as to adapt to different working conditions, such as increasing the ballast water during pile driving operation and improving the stability of the platform; ballast water is reduced during dispatching, so that the platform is convenient to move.
As shown in fig. 3, the mooring system consists of anchor machines 7 arranged at the four corners of the platform deck 6, anchor chains 8, fairleads 9 and anchor bodies 10, the arrangement of the anchor chains 8 being shown in fig. 5 symmetrically arranged at 45 degrees. The anchoring system has the functions of positioning and providing horizontal restoring force, and the horizontal counter force provided by the anchoring system can be adjusted by winching and releasing the anchor chains 8, so that the pile stabilizing platform and the pile body move. The control of the anchor machine 7 is integrated into the control platform, which can be controlled via a wireless network or by an umbilical on the pile driving vessel.
As shown in fig. 4, the monitoring system comprises an inclinometer 15 arranged on the pile body of the large-diameter single pile 4, a laser inclinometer 16 arranged on the pile holding frame 1, and a data acquisition instrument 17. The inclinometer 15 and the laser inclinometer 16 are used for measuring the verticality and the inclination of the large-diameter single pile 4, and are converted into digital signals through the data acquisition instrument 17 for monitoring. Meanwhile, the tension change of the anchor chain 8 twisted and pulled by the anchor machine 7 can be synchronously recorded through the data acquisition instrument 17, so that the control and the adjustment are convenient. The acquired digital signals can be transmitted to the piling ship by wireless or wired transmission, so that the remote control is facilitated.
The above embodiment is merely a preferred embodiment of the present invention, and those skilled in the art will understand that modifications or substitutions of technical solutions or parameters in the embodiment can be made without departing from the principle and essence of the present invention, and all of them shall be covered by the protection scope of the present invention.

Claims (7)

1. The utility model provides a float steady stake platform device of formula based on anchoring positioning control which characterized in that: the floating pile stabilizing platform device based on anchoring positioning control comprises a pile embracing frame, a floating platform, an anchoring system and a monitoring system;
the pile embracing frame is used for fixing large-diameter single piles in the construction process, the pile embracing frame is a steel structure truss, the pile embracing frame is provided with a hoop and a jack, the pile embracing frame and the hoop are arranged to be matched with the outer diameter of a pile body of the large-diameter single pile so as to ensure that the upper end of the pile body of the large-diameter single pile in the construction process is in cooperative motion with the floating type platform, the lower part of the pile embracing frame is fixed on a platform deck of the floating type platform, the inner side of the pile embracing frame is hollow to form a pile feeding port, and a plurality of flexible hoops and corresponding jacks are arranged on the inner side of the pile embracing frame so as to adapt to the;
the floating platform comprises: the floating type platform is used for fixing and transporting a pile holding frame and a large-diameter single pile, a moon pool for the large-diameter single pile to penetrate through is arranged in the center of the platform deck, the floating drum for providing buoyancy for the floating type platform is arranged below the platform deck, and the support rod is used for connecting and fixing the floating drum to ensure the structural safety under the horizontal deviation rectifying force;
the mooring system comprises: the anchoring system is used for positioning the floating platform and providing horizontal counter force required for adjusting the verticality of the large-diameter single-pile body; the upper end of the anchor chain is connected with an anchor machine, the middle of the anchor chain is adjusted, fixed and lowered to the seabed through a cable guide device, the lower end of the anchor chain is connected with an anchor body, the anchor machine is controlled hydraulically, and the tensioning and loosening of the anchor chain are controlled through a winch, so that the tension of the anchor chain is changed to adjust the displacement of the floating platform and the large-diameter single pile inside the floating platform;
the monitoring system includes: the device comprises an inclinometer, a laser inclinometer and a data acquisition instrument, wherein the inclinometer is arranged on the outer side of a large-diameter single pile and used for monitoring the verticality of a large-diameter single pile body in the pile sinking process, the laser inclinometer is arranged on a pile holding frame and used for monitoring the relative inclination angle between the pile holding frame and the large-diameter single pile body, and the data acquisition instrument is used for acquiring the inclinometer, the data acquired by the laser inclinometer and the twisting tension data of each anchor machine.
2. The floating pile-stabilizing platform assembly based on mooring positioning control as claimed in claim 1, wherein: and a ballast tank and a ballast water pump are arranged in the buoy so as to adjust the draft of the floating platform and the elevation of a platform deck under different working conditions.
3. The floating pile-stabilizing platform assembly based on mooring positioning control as claimed in claim 1, wherein: and the data acquisition instrument is connected with the remote transmission data acquisition instrument so as to realize remote monitoring control of the pile stabilizing and sinking process.
4. A pile sinking method of a floating pile-stabilizing platform device based on anchoring positioning control is characterized in that: the pile sinking method of the floating type pile-stabilizing platform device based on anchoring and positioning control is based on the floating type pile-stabilizing platform device based on anchoring and positioning control of any one of claims 1-3, and comprises the following steps: firstly, vertically lifting a large-diameter single pile by using a ship lifting machine, penetrating through a moon pool at the center of a pile holding frame and the center of a platform deck from top to bottom, and then sinking to a sea bed surface, after the pile body of the large-diameter single pile is self-stabilized, jacking an anchor ear in a horizontal plane by using a jack on the pile holding frame until the anchor ear is connected with the pile body of the large-diameter single pile, so that the large-diameter single pile and the floating platform are relatively fixed; then arranging a hammering or static pressure pile sinking device at the top end of the pile body of the large-diameter single pile to start pile sinking construction; in the pile sinking construction process, the inclination condition of the large-diameter single pile is monitored through an inclinometer arranged on the outer side of the large-diameter single pile and a laser inclinometer arranged on a pile embracing frame, when the pile body of the large-diameter single pile inclines to one side, the anchor chain length is adjusted by using an anchor machine, the anchor chain on the side is loosened, the tension of the anchor chain on the side is reduced, the anchor chain on the other side is tightened to increase the tension, so that the pile body of the large-diameter single pile inclines to the opposite direction, and the perpendicularity of the pile body of the large-diameter single pile in the whole pile sinking construction process can be ensured; the laser inclinometer is used for monitoring the relative inclination angle between the pile holding frame and the pile body of the large-diameter single pile, and acquiring data acquired by the inclinometer and the laser inclinometer and the twisting tension data of each anchor machine through the data acquisition instrument; a floating cylinder for providing buoyancy for the floating platform is arranged below the platform deck.
5. The method of sinking a floating pile-stabilized platform assembly based on mooring positioning control of claim 4, wherein: and a ballast tank and a ballast water pump are arranged in the buoy so as to adjust the draft of the floating platform and the elevation of a platform deck under different working conditions.
6. The method of sinking a floating pile-stabilized platform assembly based on mooring positioning control of claim 4, wherein: and the data acquisition instrument is connected with the remote transmission data acquisition instrument so as to realize remote monitoring control of the pile stabilizing and sinking process.
7. The method of sinking a floating pile-stabilized platform assembly based on mooring positioning control of claim 4, wherein: according to the catenary equation theory, the horizontal reaction force H provided by a single anchor chain is defined as:
Figure FDA0002603477760000031
Figure FDA0002603477760000032
V=wL (3)
Figure FDA0002603477760000033
wherein: l is the length of the anchor chain, w is the unit length buoyancy of the anchor chain, AE represents the unit length rigidity of the anchor chain, X is the horizontal distance between the cable guide and the seabed touchdown point, V is the buoyancy of the anchor chain, and T is the anchor chain tension at the cable guide position, so that the anchor chain is stranded and pulled through the anchor machine, the length L is reduced, and the horizontal counter force H is correspondingly increased; in a similar way, the anchor chain is loosened, the length L is increased, and the horizontal counter force H is correspondingly reduced.
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CN111688876A (en) * 2020-06-22 2020-09-22 中交第三航务工程勘察设计院有限公司 Floating type wind power foundation structure and construction and installation method thereof
CN113529715A (en) * 2021-08-02 2021-10-22 湖南科技大学 Special steel protects a section of thick bamboo and supporting novel deviation correcting device thereof
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