Novel self-installation anchor pile and mooring system in-place safety monitoring and emergency control method thereof

Abstract

The invention discloses a novel self-installation anchor pile and a mooring system in-place safety monitoring and emergency control method thereof. The system comprises a composite anchor pile, a force transducer, an energy and control center anchor chain and a floating platform, the seabed anchor piles are installed in two stages by combining gravity pile sinking and negative pressure suction. Firstly, the anchor pile is installed to the preset position through the natural sinking effect of gravity pile sinking, then the position of the anchor pile is stabilized through negative pressure suction, the installation process is simplified, the stability of the anchor pile is improved, and the lasting reliability of the anchor pile in the seabed environment is ensured; and meanwhile, the stress condition of the mooring system is monitored in real time by combining intelligent monitoring and control means. Based on real-time data feedback, the system can automatically adjust and provide timely negative pressure compensation, and the stability of the anchor pile under the complex sea condition is ensured. The performance of the mooring system is optimized through intelligent adjustment, the adaptability of the mooring system is improved, and long-time stable operation in different marine environments is ensured.

Description

Technical Field

[0001] The present invention belongs to the field of marine mooring systems, and relates to a new type of self-installing anchor pile and a method for on-site safety monitoring and emergency control of its mooring system. Background Art

[0002] With the continuous development of deep-sea oil and gas resources and the advancement of offshore wind power projects, the stability and safety of marine floating platforms have become particularly important. The marine environment is complex and changeable, especially in deep-sea and far-sea areas. Extreme factors such as waves, winds, and ocean currents have a great impact on the stability of floating platforms. To ensure the safe operation of the platform, the mooring system has become an important part of ensuring platform stability. In the installation and use process of traditional subsea anchor pile mooring systems, problems such as poor anchor pile stability, cumbersome installation process, and insufficient ability to adapt to extreme working conditions often occur, and there is an urgent need for improvement and optimization.

[0003] Currently, common subsea anchor pile installation methods mainly rely on mechanical pile driving and manual assistance methods, usually driving the anchor pile into the seabed through heavy mechanical equipment. However, these methods often have problems such as difficult installation and poor stability when facing deep-sea environments and complex sea conditions. Especially in extreme working conditions such as extreme waves and strong ocean currents, traditional anchor pile mooring systems are prone to uneven stress, anchor pile loosening, and even system failure, affecting the long-term stability of the platform.

[0004] To solve these problems, in recent years, technologies using composite methods to improve the stability of subsea anchor piles have gradually received attention. The installation method combining gravity pile driving and negative pressure suction can effectively improve the stability of the anchor pile. Gravity pile driving installs the anchor pile to a predetermined position by means of natural settlement, but in traditional methods, the pile driving process may affect the precise positioning of the anchor pile due to changes in the external environment. Negative pressure suction technology further stabilizes the anchor pile by generating negative pressure around the anchor pile, enhancing its adhesion to the seabed. Especially when facing complex sea conditions, it can effectively increase the adaptability of the anchor pile and improve stability. Summary of the Invention

[0005] In view of the above problems, the object of the present invention is to propose a new type of self-installing anchor pile and a method for on-site safety monitoring and emergency control of its mooring system.

[0006] The technical solution of the present invention is as follows: A new type of self-installing anchor pile and its mooring system of the present invention includes a floating platform. On both sides of the outer wall of the floating platform, anchor chains are respectively connected. At the other ends of the two anchor chains, composite anchor piles fixed on the seabed are connected. The composite anchor piles are connected to the floating platform through the anchor chains;

[0007] The composite anchor pile includes an anchor pile tip cone, a pile column gravity cylinder, and a pile column truss arranged at the bottom layer;

[0008] A pile column outer wall is fixedly installed at the upper end of the anchor pile tip cone, and a negative pressure pump is installed at the top of the pile column outer wall;

[0009] The pile column gravity cylinder is installed at the central position of the composite anchor pile and penetrates through the composite anchor pile;

[0010] The pile column truss is fixedly installed in the inner cavity of the composite anchor pile, one end of which is welded and fixed to the pile column outer wall, and the other end is poured on the pile column gravity cylinder.

[0011] Furthermore, pile holes are opened at the consolidation points on both sides of the pile column outer wall and the anchor pile tip cone, and a suitable pile hole plug is installed in the pile holes.

[0012] Furthermore, a hole plug lifting cable is penetrated inside the pile column outer wall, and a lifting winch is installed at one end of the hole plug lifting cable and the upper end of the pile column outer wall;

[0013] The initial position of the pile hole plug is installed at the pile hole of the inner cavity of the pile column outer wall, the other end of which is connected to the hole plug lifting cable and is connected to the lifting winch through the hole plug lifting cable.

[0014] Furthermore, the inside of the anchor pile tip cone is filled with concrete and is conical;

[0015] The pile column outer wall is a double-layer inner hollow cavity structure;

[0016] The pile column gravity cylinder is cylindrical and is formed by pouring concrete blocks;

[0017] The pile column truss is in an upward inclination shape.

[0018] Furthermore, the negative pressure pump is connected to the inner cavity of the composite anchor pile.

[0019] Furthermore, an energy and control center is installed on the platform deck of the floating platform;

[0020] Force measuring sensors are installed on both of the anchor chains.

[0021] Furthermore, the energy and control center includes a storage battery, a signal receiving module, a processor and a controller which are connected to each other;

[0022] The force measuring sensor includes a signal transmitting module and a three-component force sensor which are connected to each other;

[0023] The force measuring sensor is connected to the signal receiving module of the energy and control center.

[0024] Furthermore, the storage battery and the controller are respectively connected to the negative pressure pump.

[0025] Further, for the method for on-site safety monitoring and emergency control of the novel self-installing anchor pile and its mooring system, the specific steps of the installation process of the composite anchor pile are as follows:

[0026] S1. The composite anchor pile embeds into the seabed by its own gravity.

[0027] S2. The hoisting winch pulls the plug lifting cable to lift the pile plug, and opens the pile holes on the outer wall of the pile column of the composite anchor pile.

[0028] S3. The negative pressure pump exhausts air and drains water outward, generating negative pressure inside the watertight composite anchor pile, so that the seabed sediment enters the inside of the composite anchor pile through the pile holes on the outer wall of the pile column to embed the composite anchor pile.

[0029] S4. When the composite anchor pile reaches the embedding depth, the installation is completed.

[0030] Further, for the emergency process under extreme conditions of the method for on-site safety monitoring and emergency control of the novel self-installing anchor pile and its mooring system, the operation steps are as follows:

[0031] S11. The force measuring sensor monitors the force on the anchor chain, and the energy and control center judges whether the force on the anchor chain is greater than the anchor force limit of the composite anchor pile.

[0032] S12. When the force on the anchor chain is greater than the anchor force limit of the composite anchor pile, the energy and control center controls the negative pressure pump on the composite anchor pile to exhaust air and drain water outward, generating additional anchor force through negative pressure.

[0033] The basic principles of the present invention are as follows: 1. The present invention combines the methods of gravity sinking pile and negative pressure suction, and installs the subsea anchor pile in two stages. First, the anchor pile is installed to the predetermined position by the natural sinking action of gravity sinking pile, and then the position of the anchor pile is further stabilized by negative pressure suction, thus simplifying the installation process and improving the stability of the anchor pile, ensuring its long-term reliability in the subsea environment; 2. The present invention adopts the composite method of gravity sinking pile and negative pressure suction, so that under extreme conditions, the anchor chain can generate additional negative pressure suction, further enhancing the adaptability of the anchor pile. This mechanism can enhance the stability of the anchor pile in complex environments such as strong waves and ocean currents, ensuring that the mooring system can still operate efficiently and safely under various extreme conditions; 3. The present invention uses intelligent monitoring and control means to monitor the force condition of the mooring system in real time. Based on the real-time data feedback, the system can automatically adjust and provide timely negative pressure compensation to ensure the stability of the anchor pile in complex sea conditions. Through intelligent adjustment, the performance of the mooring system is optimized, its adaptability is enhanced, and long-term stable operation in different ocean environments is ensured.

[0034] The beneficial effects of the present invention are as follows: 1. The present invention combines the methods of gravity pile driving and negative pressure suction, and installs the submarine anchor pile of the mooring system in two stages, which simplifies the installation process and improves the stability of the anchor pile; 2. The present invention adopts a composite method combining gravity pile driving and negative pressure suction, which can generate additional negative pressure suction on the anchor chain under extreme working conditions, improving the adaptability of the anchor pile; 3. The present invention adopts intelligent monitoring and control means, which can monitor the stress condition of the mooring system in real time and provide timely negative pressure compensation, thus improving the stability of the anchor pile under complex sea conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 is a sectional structure diagram of the composite anchor pile in the present invention;

[0037] Figure 3 is a schematic diagram of the composition of the energy and control center and the force measuring sensor in the present invention;

[0038] Figure 4 is a flowchart of the installation of the composite anchor pile in the present invention;

[0039] Figure 5 is an emergency flowchart under extreme working conditions of the present invention;

[0040] In the figure: 1 is the composite anchor pile, 11 is the anchor pile tip cone, 12 is the outer wall of the pile column, 13 is the pile column gravity cylinder, 14 is the pile column truss, 15 is the pile hole plug, 16 is the hole plug lifting cable, 17 is the lifting winch, 18 is the negative pressure pump;

[0041] 2 is the force measuring sensor, 21 is the three-component force sensor, 22 is the signal transmitting module;

[0042] 3 is the energy and control center, 31 is the storage battery, 32 is the signal receiving module, 33 is the processor, 34 is the controller;

[0043] 4 is the anchor chain;

[0044] 5 is the floating platform. DETAILED DESCRIPTION OF THE INVENTION

[0045] The following further details the specific technical solutions of the present invention in combination with specific examples.

[0046] As shown in the figure, a new type of self-installing anchor pile and its mooring system in-situ safety monitoring and emergency control method according to the present invention; its system mainly includes a composite anchor pile 1, a force measuring sensor 2, an energy and control center 3, an anchor chain 4 and a floating platform 5; among them, the composite anchor pile 1 combines the principles of gravity-type and negative pressure-type anchor piles to complete a simpler installation and stable in-situ performance;

[0047] The composite anchor pile 1 is connected to the floating platform 5 through an anchor chain 4 to anchor the floating platform 5. A force measuring sensor 2 is installed on the anchor chain 4 to monitor the force on the anchor chain during the mooring process;

[0048] The energy and control center 3 is installed on the platform deck of the floating platform 5 to provide energy for the entire system, receive the force on the anchor chain monitored by the force measuring sensor 2, and send control information based on the force on the anchor chain to adjust the working state of the composite anchor pile 1.

[0049] Further, the composite anchor pile 1 is mainly composed of an anchor pile tip cone 11, a pile column outer wall 12, a pile column gravity cylinder 13, a pile column truss 14, a pile hole plug 15, a plug lifting cable 16, a lifting winch 17, and a negative pressure pump 18; among them, the inside of the anchor pile tip cone 11 is filled with concrete, showing a conical structure, which provides a large gravity for the initial in-place installation of the composite anchor pile 1 and reduces the resistance of the composite anchor pile 1 sinking into the seabed;

[0050] The pile column outer wall 12 is a double-layer inner hollow cavity structure, and a pile hole is opened at the consolidation part of the pile column outer wall 12 and the anchor pile tip cone 11, which provides a watertight space for the inner cavity of the composite anchor pile 1 when the pile hole plug 15 or seabed sediment is blocked;

[0051] The pile column gravity cylinder 13 is installed at the central part of the composite anchor pile 1, showing a cylindrical shape and running through the composite anchor pile 1, which is formed by pouring concrete blocks, providing a large gravity for the initial in-place installation of the composite anchor pile 1; during the design process, based on the specific working conditions, the dimensions and weights of the anchor pile tip cone 11 and the pile column gravity cylinder 13 are designed to ensure that the initial pouring by gravity meets the condition that the pile holes opened on the pile column outer wall 12 are buried by seabed sediment;

[0052] The pile column truss 14 is fixedly installed in the inner cavity of the composite anchor pile 1, one end of which is welded and fixed to the pile column outer wall 12, and the other end is poured on the pile column gravity cylinder 13, showing an upward inclination angle. When the seabed sediment is poured into the composite anchor pile 1 under negative pressure, on the one hand, it provides a supporting force against the negative pressure, and on the other hand, it provides additional resistance;

[0053] The initial position of the pile hole plug 15 is installed at the pile hole of the inner cavity of the pile column outer wall 12 to block the pile hole. The other end of it is connected to the plug lifting cable 16 and is connected to the lifting winch 17 through the plug lifting cable 16. When the lifting winch rotates, the pile hole plug 15 is lifted, and the sediment outside the composite anchor pile 1 can be poured into the inside of the composite anchor pile 1;

[0054] The negative pressure pump 18 is installed at the top of the outer wall 12 of the pile column and is connected to the inside of the composite anchor pile 1, and can discharge the gas and liquid inside the composite anchor pile 1 from the cavity, generating negative pressure, so that the sediment is poured into the inside of the composite anchor pile 1 through the pile holes opened on the outer wall 12 of the pile column, and at the same time the composite anchor pile 1 penetrates into the seabed.

[0055] Further, the energy and control center 3 is mainly composed of a storage battery 31, a signal receiving module 32, a processor 33 and a controller 34; among them, the storage battery 21 is used to provide electrical energy for the entire system, and the signal receiving module 32 is used to receive the force condition of the anchor chain 4 transmitted by the force measuring sensor 2;

[0056] The force measuring sensor 2 is composed of a signal transmitting module 22 and a three-component force sensor 21. The three-component force sensor 21 monitors the force magnitude of the anchor chain 4. The signal transmitting module 22 sends the force information of the anchor chain 4 transmitted by the three-component force sensor 21 to the signal receiving module 32 of the energy and control center 3. The signal receiving module 32 further transmits the force information of the anchor chain 4 to the processor 33 to process the force information transmitted by the signal receiving module 32 and generate a control signal to be transmitted to the control 34. The controller 34 and the connected negative pressure pump 18 perform corresponding operations.

[0057] Further, as Figure 4 shown, the installation process of the composite anchor pile of the novel self-installing anchor pile and its mooring system in-situ safety monitoring and emergency control method includes the following steps:

[0058] S1. The composite anchor pile 1 embeds into the seabed by its own gravity;

[0059] S2. The hoisting winch 17 pulls the plug lifting cable 16 to lift the pile hole plug 15, and opens the pile holes on the outer wall 12 of the pile column of the composite anchor pile 1;

[0060] S3. The negative pressure pump 18 discharges air and water outwards, generates negative pressure inside the watertight composite anchor pile 1, and enables the seabed sediment to enter the inside of the composite anchor pile 1 through the pile holes on the outer wall 12 of the pile column to embed the composite anchor pile 1;

[0061] S4. The composite anchor pile 1 reaches the embedding depth and the installation is completed.

[0062] Further, as Figure 5 shown, the extreme condition emergency process of the novel self-installing anchor pile and its mooring system in-situ safety monitoring and emergency control method includes the following steps:

[0063] S11. The force measuring sensor 2 monitors the force of the anchor chain 4, and the energy and control center 3 judges whether the force of the anchor chain 4 is greater than the anchor holding force limit of the composite anchor pile 1;

[0064] S12. When the force on the anchor chain 4 is greater than the ultimate anchoring force of the composite anchor pile 1, the energy and control center 3 controls the negative pressure pump on the composite anchor pile 1 to exhaust air and drain water outward, generating additional anchoring force through negative pressure.

[0065] With the progress of intelligent technology, intelligent monitoring and control means are increasingly widely used in mooring systems; by real-time monitoring the force conditions of the mooring system, the force state of the anchor pile can be dynamically adjusted according to real-time data and negative pressure compensation can be carried out, which provides a reliable guarantee for the operation of the system in complex sea conditions; through intelligent adjustment, the stability of the platform can be optimized, avoiding the problem of anchor pile instability caused by drastic changes in sea conditions, thus ensuring the long-term stable operation of the floating platform 5 in the deep-sea environment.

[0066] The present invention combines the composite installation method of gravity sinking pile and negative pressure suction, and combines intelligent control means, solves the deficiencies of traditional mooring systems in terms of installation and stability, effectively improves the stability and safety of the floating platform 5 in the ocean under complex sea conditions, and provides a strong guarantee for the safe and reliable operation of ocean engineering such as deep-sea oil and gas exploitation and offshore wind power.

Claims

1. A novel self-installing anchor pile and its mooring system, characterized in that, The invention comprises a floating platform (5), anchor chains (4) are respectively connected to both sides of the outer wall of the floating platform (5), the other ends of the anchor chains (4) on both sides are connected to composite anchor piles (1) fixed on the seabed, and the composite anchor piles (1) are connected to the floating platform (5) through the anchor chains (4); The composite anchor pile (1) comprises an anchor pile cone (11) installed at the bottom layer, a pile column gravity cylinder (13) and a pile column truss (14); A pile column outer wall (12) is fixedly arranged at the upper end of the anchor pile tip cone (11), and a negative pressure pump (18) is installed at the top of the pile column outer wall (12); The pile column gravity cylinder (13) is installed at the center of the composite anchor pile (1) and passes through the composite anchor pile (1); The pile truss (14) is fixedly arranged in the inner cavity of the composite anchor pile (1), one end of which is welded and fixed to the pile outer wall (12), and the other end of which is cast on the pile gravity cylinder (13).

2. A novel self-installing anchor pile and its mooring system according to claim 1, characterized in that, A pile hole is provided at the joint between the outer wall (12) of the pile column and the two sides of the anchor pile cone (11), and a matching pile hole plug (15) is installed in the pile hole.

3. A novel self-installing anchor pile and its mooring system according to claim 2, characterized in that, A plug lifting cable (16) is provided inside the pile column outer wall (12), and a lifting winch (17) is installed at one end of the plug lifting cable (16) and at the upper end of the pile column outer wall (12); The pile hole plug (15) is initially installed at the pile hole in the inner cavity of the pile column outer wall (12), and the other end is connected to the hole plug lifting cable (16) and is connected to the lifting winch (17) through the hole plug lifting cable (16).

4. A novel self-installing anchor pile and its mooring system according to claim 1, characterized in that, The interior of the anchor pile tip cone (11) is filled with concrete and is in a cone shape; The pile column outer wall (12) is a double-layer cavity structure with a hollow interior; The pile gravity cylinder (13) is cylindrical and is cast from concrete blocks; The pile column truss (14) is in an upward inclination shape.

5. A novel self-installing anchor pile and its mooring system according to claim 1, characterized in that, The negative pressure pump (18) is in communication with the inner cavity of the composite anchor pile (1).

6. A novel self-installing anchor pile and its mooring system according to claim 1, characterized in that, An energy and control center (3) is installed on the platform deck of the floating platform (5); Force sensors (2) are installed on the anchor chains (4) on both sides.

7. A novel self-installing anchor pile and its mooring system according to claim 6, characterized in that, The energy and control center (3) includes a battery (31), a signal receiving module (32), a processor (33) and a controller (34) which are interconnected; The force sensor (2) comprises a signal transmission module (22) and a three-force sensor (21) which are connected to each other; The force sensor (2) is connected to a signal receiving module (32) of an energy and control center (3).

8. A novel self-installing anchor pile and its mooring system according to claim 7, characterized in that, The storage battery (31) and the controller (34) are respectively connected to the negative pressure pump (18).

9. A method for on-site safety monitoring and emergency control of a new type of self-installing anchor pile and its mooring system according to any one of claims 1-8; characterized in that, The specific steps of the installation process of the composite anchor pile (1) are as follows: S1, the composite anchor pile (1) is embedded in the seabed by its own gravity; S2, the lifting winch (17) pulls the hole plug lifting cable (16) to lift the pile hole plug (15), thereby opening the pile hole on the outer wall (12) of the pile column of the composite anchor pile (1); S3, the negative pressure pump (18) exhausts air and drains water to the outside, thereby generating negative pressure inside the watertight composite anchor pile (1), so that the seabed sediments enter the composite anchor pile (1) through the pile hole on the pile column outer wall (12) and are embedded in the composite anchor pile (1); S4. The composite anchor pile (1) reaches the embedding depth and the installation is completed.

10. The extreme condition emergency process of a new type of self-installing anchor pile and its in-situ safety monitoring and emergency control method for a mooring system according to claim 9, characterized in that, The operation steps are as follows: S11. The force sensor (2) monitors the force on the anchor chain (4), and the energy and control center (3) determines whether the force on the anchor chain (4) is greater than the anchoring force limit of the composite anchor pile (1); S12. When the force on the anchor chain (4) is greater than the anchoring force limit of the composite anchor pile (1), the energy and control center (3) controls the negative pressure pump (18) on the composite anchor pile (1) to exhaust air and drain water outwards, and generates additional anchoring force through negative pressure.

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