Deep sea pile foundation

Abstract

The embodiment of the utility model provides a deep sea pile foundation, and relates to the technical field of ocean engineering. The deep sea pile foundation comprises a first pile foundation part and a second pile foundation part, wherein the first pile foundation part is provided with a penetration cavity with an opening; the second pile foundation part is connected with the cavity bottom of the injection cavity of the first pile foundation part through the opening, and the second pile foundation part and the first pile foundation part are coaxially arranged. According to the deep sea pile foundation, the pile sinking efficiency of the pile foundation can be improved.

Description

Technical Field

[0001] This application relates to the field of marine engineering technology, and in particular to a deep-sea pile foundation. Background Technology

[0002] The ocean possesses abundant oil and gas resources, and drilling platforms are needed to extract these resources. Piling is one of the crucial infrastructure components supporting drilling platforms, ensuring their stable operation in the marine environment.

[0003] The transport vessel delivers the deep-sea pile foundation to the designated marine operation area. Once the transport vessel arrives at the designated location, the deep-sea pile foundation is lifted from the vessel and lowered into the predetermined position in the sea using a floating crane or lifting device on board. Subsequently, the pile driving hammer is activated to apply hammering force to the deep-sea pile foundation, sinking it into the mud layer of the seabed until the deep-sea pile foundation reaches the required depth.

[0004] However, seabed conditions are complex, including mud, rock, and sand layers. Deep-sea pile foundations are affected by these conditions during the pile driving process, resulting in low pile driving efficiency. Furthermore, the low temperature, high pressure, and poor visibility in the seabed environment further reduce the efficiency of deep-sea pile foundation driving. Utility Model Content

[0005] In view of the above problems, this application provides a deep-sea pile foundation that can improve the pile driving efficiency of deep-sea pile foundations.

[0006] To achieve the above objectives, the embodiments of this application provide the following technical solutions:

[0007] This application provides a deep-sea pile foundation, including a first pile foundation and a second pile foundation, wherein the first pile foundation is provided with a penetration cavity with an opening;

[0008] The second pile base is connected to the bottom of the penetration cavity of the first pile base through an opening, and the second pile base and the first pile base are coaxially arranged.

[0009] In some embodiments of this application, the pile foundation is provided with a suction port, and a suction pump is used to draw the mixture inside the pile foundation from the suction port.

[0010] In some embodiments of this application, the suction port is located on the side of the first pile base away from the outlet, and the suction port is connected to the inlet of the suction pump.

[0011] In some embodiments of this application, a first hoisting part is provided on the outer surface of the first pile foundation;

[0012] An auxiliary straightening device is installed in the middle and lower part of the deep-sea pile foundation, and a second lifting part is provided on the outer surface of the auxiliary straightening device;

[0013] The deep-sea pile foundation is lowered by connecting the first and second lifting sections with ropes.

[0014] In some embodiments of this application, the deep-sea pile foundation is provided with a straightening device, and the straightening device is provided with a straightening hole;

[0015] Deep-sea pile foundations are installed through the straightening holes.

[0016] In some embodiments of this application, the axis of the straightening hole is perpendicular to the seabed surface.

[0017] In some embodiments of this application, the diameter of the end of the second pile base away from the first pile base is smaller than the diameter of the end of the second pile base closer to the first pile base.

[0018] This application provides a deep-sea pile foundation. The deep-sea pile foundation includes a first pile base and a second pile base, allowing for a heavier pile foundation that can better resist upward pull-out forces. The heavier weight and negative pressure on the penetration cavity of the first pile base improve the pile driving efficiency. The installation method is as follows: First, a straightening device is lowered to the seabed to keep the deep-sea pile foundation vertical during installation. Next, the straightening device has a straightening hole, through which the deep-sea pile foundation is lowered. This allows adjustment of the pile foundation's position or tilt. Then, a pile hammer is used to drive the pile foundation, causing it to sink into the straightening hole and into the seabed. The high-speed, high-frequency hammering transmits impact force to the pile foundation, resulting in rapid sinking and improved pile driving efficiency. Finally, the straightening device is removed and retrieved. Resource conservation can be achieved through the recycling and reuse of the straightening device. Finally, the deep-sea pile foundation is equipped with a suction port. A suction pump draws the mixture from the pile foundation through this port, allowing it to continue sinking until it reaches the seabed. The pile foundation is then driven by a pile hammer, working in conjunction with the suction pump. The combined effects of gravity, the impact of the pile hammer, and the negative pressure created by the suction pump accelerate the sinking speed and improve the pile driving efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural schematic diagram of a deep-sea pile foundation provided in an embodiment of this application;

[0021] Figure 2This is a schematic diagram illustrating the process of lowering the straightening device provided in an embodiment of this application.

[0022] Figure 3 A schematic diagram illustrating the process of lowering deep-sea pile foundations, provided in an embodiment of this application;

[0023] Figure 4 A schematic diagram illustrating the process of deep-sea pile foundations being installed through a straightening device, as provided in an embodiment of this application.

[0024] Figure 5 This is a schematic diagram illustrating the process of removing and recovering the auxiliary straightening device provided in an embodiment of this application;

[0025] Figure 6 A schematic diagram of the first process of a pile driver striking a deep-sea pile foundation, provided in an embodiment of this application;

[0026] Figure 7 This is a schematic diagram illustrating the second process of a pile driver striking a deep-sea pile foundation, as provided in an embodiment of this application.

[0027] Figure 8 A schematic diagram illustrating the process of removing and recovering the straightening device provided in an embodiment of this application;

[0028] Figure 9 This is a schematic diagram illustrating the completion of pile driving for a deep-sea pile foundation, as provided in an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 10 - Straightening device; 110 - Straightening hole;

[0031] 20 - Deep-sea pile foundation;

[0032] 210 - First pile foundation; 211 - Suction port; 212 - Penetration cavity; 213 - Opening; 214 - First hoisting part; 220 - Second pile foundation;

[0033] 30 - Pile hammer;

[0034] 40 - Suction pump;

[0035] 50 - Auxiliary straightening device;

[0036] 510 - Second hoisting section;

[0037] 60 - Underwater robot;

[0038] 70 - Rope;

[0039] L - Sea surface; M - Seabed surface. Detailed Implementation

[0040] As described in the background section, in related technologies, transport vessels deliver deep-sea pile foundations to a predetermined marine operation area. Once the transport vessel arrives at the designated location, a floating crane or lifting device on the vessel lifts the deep-sea pile foundation from the ship and lowers it into the predetermined position in the sea. Subsequently, a pile-driving hammer is activated to apply hammering force to the deep-sea pile foundation, sinking it into the mud layer of the seabed until the pile foundation reaches the required depth.

[0041] The seabed conditions are complex, including various types such as mud, rock, and sand layers. These different types of mud layers have different mechanical properties and bearing capacities, resulting in uneven resistance and deformation during the pile driving process in deep-sea pile foundations. This increases the difficulty of pile driving and reduces its efficiency. At the same time, the low temperature in the seabed environment may cause the pile material to become brittle and reduce its bearing capacity, while high pressure may cause deformation and damage to the pile material. Poor visibility increases the difficulty of construction monitoring and measurement. All these factors further reduce the efficiency of pile driving.

[0042] In view of this, this application provides a deep-sea pile foundation. The deep-sea pile foundation includes a first pile foundation and a second pile foundation, which allows the deep-sea pile foundation to be heavier, and the heavier deep-sea pile foundation can better resist upward pull-out forces. By setting a heavier weight for the deep-sea pile foundation and the negative pressure effect on the penetration cavity of the first pile foundation, the pile driving efficiency of the deep-sea pile foundation is improved. The following is the installation method of the deep-sea pile foundation. First, a straightening device is lowered to the seabed to keep the deep-sea pile foundation in a vertical state during installation. Next, the straightening device is provided with a straightening hole, and the deep-sea pile foundation is lowered and inserted into the straightening hole. This allows adjustment of the position or tilt of the deep-sea pile foundation. Then, the deep-sea pile foundation is hammered by a pile hammer, causing the deep-sea pile foundation to sink in the straightening hole and sink into the seabed. The pile hammer can transmit impact force to the deep-sea pile foundation through high-speed, high-frequency hammering, thereby enabling the deep-sea pile foundation to sink quickly and improving the pile driving efficiency of the deep-sea pile foundation. Subsequently, the straightening device is removed and recycled. Resource conservation is achieved through the recycling and reuse of the straightening device. Finally, the deep-sea pile foundation is equipped with a suction port. A suction pump draws the mixture within the deep-sea pile foundation from the suction port, allowing the pile foundation to continue sinking until it reaches the seabed. The deep-sea pile foundation is then driven by a pile hammer, working in conjunction with the suction pump. The combined effects of gravity, the impact of the pile hammer, and the negative pressure created by the suction pump accelerate the sinking speed of the deep-sea pile foundation, improving its driving efficiency.

[0043] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0044] Reference Figure 1 As shown in the embodiment of this application, the deep-sea pile foundation 20 can provide support for large structures (such as offshore platforms, bridges, and docks). By embedding itself in the soil or rock strata below the seabed, the deep-sea pile foundation 20 transfers the load to deeper strata, thereby providing load-bearing capacity for large structures.

[0045] The deep-sea pile foundation 20 includes a first pile foundation 210 and a second pile foundation 220. The first pile foundation 210 has a penetration cavity 212 with an opening 213. The second pile foundation 220 is connected to the bottom of the penetration cavity 212 of the first pile foundation 210 through the opening 213. The second pile foundation 220 is more slender than the first pile foundation 210. During the pile driving process of the deep-sea pile foundation 20, the deep-sea pile foundation 20 is installed vertically, and the second pile foundation 220 sinks into the seabed first.

[0046] After the deep-sea pile foundation 20 is installed, its stability is maintained by the friction between the outer surface of the first pile foundation 210 and the surrounding soil, the friction between the outer surface of the second pile foundation 220 and the surrounding soil, and the end bearing capacity of the pile tip of the second pile foundation 220. Furthermore, the deep-sea pile foundation 20 can be embedded into the soil by applying negative pressure within the penetration cavity 212 of the first pile foundation 210, thus maintaining its stability.

[0047] Compared to conventional pile foundations, deep-sea pile foundations 20 can improve their pull-out bearing capacity by applying negative pressure to the outer surfaces of the first pile base 210, the second pile base 220, and the penetration cavity 212 of the first pile base 210. The deep-sea pile foundation 20 includes a first pile base 210 and a second pile base 220, thus increasing its weight. The heavier deep-sea pile foundation 20 can better resist upward pull-out forces. The increased weight and the negative pressure applied to the penetration cavity 212 of the first pile base 210 further improve the pile driving efficiency of the deep-sea pile foundation 20.

[0048] During the installation of the deep-sea pile foundation 20, it will be affected by factors such as hammering and vibration, which may cause cracks to appear in the first pile foundation 210 and the second pile foundation 220. The top of the second pile foundation 220 and the bottom of the penetration cavity 212 of the first pile foundation 210 can be connected by welding to improve the reliability of the deep-sea pile foundation 20.

[0049] The second pile foundation 220 is coaxially arranged with the first pile foundation 210, which improves the uniformity of the deep-sea pile foundation 20 under stress. This avoids the deep-sea pile foundation 20 from tilting or becoming unstable due to eccentric stress, and improves the bearing capacity and overturning resistance of the deep-sea pile foundation 20.

[0050] Preparations for the lowering of the deep-sea pile foundation 20 can be completed before it is lowered. The deep-sea pile foundation 20 and related pile-driving equipment are transported to the designated location by a transport vessel. After the relevant pile-driving equipment (straightening device, measuring device) for the deep-sea pile foundation 20 is fully prepared, the deep-sea pile foundation 20 and related pile-driving equipment are inspected for damage or defects. Then, the auxiliary straightening device 50 is installed on the lower-middle part of the deep-sea pile foundation 20 near its bottom. The deep-sea pile foundation 20 with the auxiliary straightening device 50 installed is lowered from the transport vessel into the sea via the sea surface L.

[0051] In a seawater environment, the deep-sea pile foundation 20 is subjected to the combined effects of gravity and buoyancy or other forces (wave forces). By adjusting the auxiliary straightening device 50, the center of gravity of the deep-sea pile foundation 20 and the auxiliary straightening device 50 installed together is adjusted to achieve force balance and ensure that the deep-sea pile foundation 20 remains vertical during its sinking process. This ensures that the deep-sea pile foundation 20 maintains its verticality during the lowering process, which is beneficial for the subsequent pile driving.

[0052] Reference Figure 2 As shown, the straightening device 10 is lowered onto the seabed surface M using lifting equipment on the transport vessel. The seabed surface M provides a stable mounting surface for the straightening device 10, reducing the impact of the external environment on it. In the marine environment, currents and waves may cause the deep-sea pile foundation 20 to deviate from its intended position or tilt during the pile driving process. The straightening device 10 can keep or adjust the deep-sea pile foundation 20 to a vertical position during the pile driving installation stage, preventing it from tilting or shifting during the sinking process, thereby improving the installation accuracy of the deep-sea pile foundation 20.

[0053] In some embodiments, the straightening device 10 is configured as a hydraulic straightening device. The hydraulic straightening device can provide greater torque and power, enabling it to complete the straightening and centering operations of the deep-sea pile foundation 20 more quickly, thereby improving work efficiency.

[0054] The straightening device 10 includes a clamping ring assembly. The clamping ring assembly can enclose the deep-sea pile 20 to ensure the stability of the deep-sea pile 20 during installation. The clamping ring structure is typically made of high-strength materials to withstand the enormous pressure generated when the deep-sea pile 20 is inserted into the seabed.

[0055] The straightening device 10 includes a swing frame assembly. The swing frame assembly enables the straightening device 10 to adapt to the seabed topography and minor offsets of the deep-sea pile foundation 20, improving the stability and flexibility of the straightening device 10 in complex seabed environments.

[0056] The righting device 10 includes a fixing frame. The fixing frame is a supporting structure for the righting device 10, used to secure the righting device 10 to the seabed surface M. The fixing frame can be made of strong steel or other high-strength materials to ensure its stability and durability.

[0057] The straightening device 10 includes a roll compensation hydraulic cylinder. By adjusting the extension and retraction of the hydraulic cylinder, precise control of the position or vertical state of the deep-sea pile foundation 20 can be achieved, ensuring the verticality and stability of the deep-sea pile foundation 20.

[0058] The clamping ring assembly is connected to the swing frame, which is connected to the upper end of the fixed frame via a swingable connector. The bottom end of the fixed frame is fixed to the seabed surface M by bolts or anchors to ensure the stability and reliability of the entire righting device 10.

[0059] The straightening device 10 also includes a base plate to improve the stability and accuracy of the deep-sea pile foundation 20 during installation.

[0060] In some embodiments, after the straightening device 10 is lowered to the mudline seabed surface M, it is necessary to ensure that the axis of the straightening hole 110 is perpendicular to the seabed surface M in order to ensure the accurate installation of the subsequent deep-sea pile foundation 20.

[0061] Because of its flexibility and high precision, the underwater robot 60 can operate in the complex environment of the ocean. The underwater robot 60 observes and provides feedback on the status of the righting device 10, allowing for corresponding adjustments to the righting device 10.

[0062] Reference Figure 3 As shown, in some embodiments, a first lifting part 214 is provided on the outer surface of the first pile foundation 210 for lifting during the lowering of the deep-sea pile foundation 20. The first lifting part 214 can be configured as a lifting lug, lifting ring, hook, or other parts, capable of bearing the gravity during the lowering of the deep-sea pile foundation 20.

[0063] The auxiliary straightening device 50 has a second lifting section 510 on its outer surface. The second lifting section 510 is used for lifting the deep-sea pile foundation 20 during the lowering process. The second lifting section 510 can be configured with lifting lugs, lifting rings, hooks, etc., and can withstand the gravity of the deep-sea pile foundation 20 during the lowering process.

[0064] A rope 70 is connected at one end to the first lifting unit 214 and at the other end to the second lifting unit 510. The rope 70 is also connected to the lifting equipment on the transport ship. The lowering speed and position of the deep-sea pile 20 can be controlled by adjusting the lifting equipment. After the lifting equipment lifts the deep-sea pile 20 from the transport ship, it is lowered into the seawater. The deep-sea pile 20 is adjusted to a vertical position by adjusting the rope 70, and then the auxiliary straightening device 50 is used to ensure the deep-sea pile 20 is in a vertical position. The use of the first lifting unit 214 and the second lifting unit 510 reduces the time spent on lifting the deep-sea pile 20, thus improving the installation efficiency.

[0065] Reference Figure 4 and Figure 5 As shown, the straightening device 10 is also provided with a straightening hole 110, which is formed by a clamping ring assembly. The deep-sea pile foundation 20 is inserted into the straightening hole 110 to adjust the position or tilt of the deep-sea pile foundation 20.

[0066] After the righting device 10 is lowered to the mudline seabed surface M, the deep-sea pile 20 is lowered using rope 70 and inserted into the righting hole 110. This arrangement, by installing the deep-sea pile 20 within the righting device 10, adjusts the state of the deep-sea pile 20 before it sinks into the seabed, preventing it from tilting or shifting. Furthermore, the righting device 10 also provides a supporting foundation for the deep-sea pile 20.

[0067] In some embodiments, after the deep-sea pile 20 is inserted into the straightening hole 110, the auxiliary straightening device 50 can no longer adjust the state of the deep-sea pile 20. The auxiliary straightening device 50 is removed from the deep-sea pile 20 and recycled. By recycling the auxiliary straightening device 50, it can be used in the installation process of other deep-sea piles 20, thereby reducing the installation cost of other deep-sea piles 20.

[0068] Furthermore, when the auxiliary straightening device 50 is on the deep-sea pile foundation 20, it increases the contact area between the deep-sea pile foundation 20 and the surrounding soil, thereby increasing the frictional resistance. Removing the auxiliary straightening device 50 from the deep-sea pile foundation 20 can reduce the resistance during the pile driving process and further improve the pile driving efficiency of the deep-sea pile foundation 20.

[0069] Specifically, the underwater robot 60 is used to remove the auxiliary straightening device 50 to improve the installation efficiency of the deep-sea pile foundation 20.

[0070] Reference Figure 6 As shown, after the deep-sea pile 20 is lowered and inserted into the straightening hole 110, the deep-sea pile 20 is straightened by the straightening device 10 and can proceed to the next installation step. Due to its heavy weight, the deep-sea pile 20 will automatically sink under the influence of gravity, and its lower end will sink into the seabed surface M. However, the depth to which the deep-sea pile 20 sinks under its own weight is limited. In order to drive the deep-sea pile 20 into the predetermined depth, the pile hammer 30 is used to hammer the deep-sea pile 20, causing it to sink into the straightening hole 110 and into the seabed surface M. The pile hammer 30 can transmit impact force to the deep-sea pile 20 through high-speed, high-frequency hammering force, thereby enabling the deep-sea pile 20 to sink rapidly.

[0071] Specifically, the second pile base 220 first contacts the seabed surface M, and the lower end of the second pile base 220 is relatively thin. Under the action of gravity and the force of the pile hammer 30, the pressure at the lower end of the second pile base 220 will be relatively large, allowing the deep-sea pile 20 to penetrate into deeper or harder soil layers more easily, which can reduce energy consumption during the pile driving process.

[0072] The slender lower end of the deep-sea pile 20 experiences relatively less resistance during the sinking process, making it easier to reach the required depth and improving the pile driving efficiency of the deep-sea pile 20.

[0073] In some embodiments, the pile driver 30 is configured as a hydraulic pile driver. The hydraulic system of the hydraulic pile driver can provide the hammering force. The hydraulic system is characterized by adjustable pressure and controllable energy. By adjusting the pressure of the hydraulic system, the magnitude of the hammering force can be controlled. This ensures that the deep-sea pile foundation 20 is not damaged by excessive force during the hammering process.

[0074] The hydraulic pile driver includes an intelligent control system, which enables real-time monitoring of various data during the hammering process, such as impact force and pile sinking depth. When data is abnormal or reaches preset values, the intelligent control system will automatically alarm and take corresponding protective measures, thereby ensuring the safety and reliability of the deep-sea pile foundation 20.

[0075] Because hydraulic systems have high energy conversion efficiency, hydraulic pile hammers produce relatively low noise during the hammering process, which meets environmental protection requirements.

[0076] Reference Figure 7 and Figure 8 As shown, after the deep-sea pile foundation 20 is driven into the seabed surface M to a certain depth by the pile hammer 30, the friction between the deep-sea pile foundation 20 and the soil of the seabed surface M will increase, giving the deep-sea pile foundation 20 a certain pull-out resistance and tilt resistance.

[0077] In the initial stage of sinking of the deep-sea pile foundation 20, the straightening device 10 plays a role in maintaining verticality and guiding sinking. The diameter of the first pile base 210 is much larger than that of the second pile base 220. As the sinking depth of the deep-sea pile foundation 20 increases, in order to prevent the first pile base 210 from interfering with the straightening device 10, the straightening device 10 is removed to allow the deep-sea pile foundation 20 to continue sinking.

[0078] The straightening device 10 is recyclable. The straightening device 10 is a commonly used facility in the installation of deep-sea pile foundations 20, and its service life is typically long. Therefore, the straightening device 10 can be recycled and reused. By recycling and reusing the straightening device 10, resources can be saved and construction waste can be reduced.

[0079] If the first pile foundation 210 of the deep-sea pile foundation 20 sinks to a position 5 meters above the straightening device 10, the straightening device 10 is removed and retrieved. At this time, the deep-sea pile foundation 20 has sunk to a shallow depth in the soil, and is prone to tilting under the action of waves or other external forces, which leads to a decrease in its bearing capacity and stability in the soil.

[0080] If the first pile base 210 of the deep-sea pile foundation 20 sinks to 3 meters below the leveling device 10, it will cause friction, collision or compression between the first pile base 210 and the leveling device 10, affecting the quality of the deep-sea pile foundation 20.

[0081] In some embodiments, the deep-sea pile foundation 20 is sunk to 3-5 meters above the straightening device 10, and the straightening device 10 is removed and recovered to improve the bearing capacity and stability of the deep-sea pile foundation 20.

[0082] Reference Figure 9 As shown, after the righting device 10 is removed and retrieved, the deep-sea pile foundation 20 continues to sink under the hammering of the pile hammer 30 until the first pile base 210 contacts the seabed surface M. The first pile base 210 of the deep-sea pile foundation 20 is equipped with a suction port 211. The suction pump 40 extracts the mixture (such as soil, seawater, etc.) from the penetration cavity 212 of the deep-sea pile foundation 20 through the suction port 211. As the mixture is extracted, a negative pressure environment is formed within the penetration cavity 212. Under the action of negative pressure, the deep-sea pile foundation 20 is pressed into the surrounding soil. Furthermore, the deep-sea pile foundation 20 continues to sink under the hammering of the pile hammer 30, and the deep-sea pile foundation 20 sinks into the seabed, completing the pile driving process.

[0083] During the sinking process of the deep-sea pile foundation 20, the pile hammer 30 strikes the deep-sea pile foundation 20 and works in conjunction with the suction pump 40. Under the combined action of gravity, the impact force of the pile hammer 30, and the negative pressure generated by the suction pump 40, the sinking speed of the deep-sea pile foundation 20 is accelerated, and the pile driving efficiency of the deep-sea pile foundation 20 is improved.

[0084] By controlling the power and suction speed of the suction pump 40, and continuously monitoring the sinking speed and depth of the deep-sea pile foundation 20, it can be ensured that the deep-sea pile foundation 20 reaches the predetermined design depth and provides good bearing capacity and stability.

[0085] Furthermore, a support is provided at the top of the deep-sea pile foundation 20, which can be used to fix the suction pump 40 to ensure the stability of the suction pump 40.

[0086] In some embodiments, the suction port 211 is located on the side of the first pile base 210 opposite to the port 213. That is, the suction port 211 of the first pile base 210 is located at the top of the penetration cavity 212 near the first pile base 210. By communicating with the suction port 211 through the inlet of the suction pump 40, the mixture in the penetration cavity 212 can be extracted to ensure that the penetration cavity 212 is in a negative pressure state, so as to ensure that the first pile base 210 sinks under the action of negative pressure.

[0087] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0088] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, component, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, components, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A deep-sea pile foundation, characterized in that, The deep-sea pile foundation (20) includes a first pile foundation (210) and a second pile foundation (220), wherein the first pile foundation (210) is provided with a penetration cavity (212) with an opening (213); The second pile base (220) is connected to the bottom of the penetration cavity (212) of the first pile base (210) through the opening (213), and the second pile base (220) and the first pile base (210) are coaxially arranged.

2. The deep-sea pile foundation according to claim 1, characterized in that, The deep-sea pile foundation (20) is provided with a suction port (211), and a suction pump (40) is used to draw the mixture inside the deep-sea pile foundation (20) from the suction port (211).

3. A deep-sea pile foundation according to claim 2, characterized in that, The suction port (211) is located on the side of the first pile base (210) away from the opening (213), and the suction port (211) is connected to the inlet of the suction pump (40).

4. A deep-sea pile foundation according to claim 1, characterized in that, The first pile foundation (210) is provided with a first hoisting part (214) on its outer surface; An auxiliary straightening device (50) is installed in the middle and lower part of the deep-sea pile foundation (20), and a second hoisting part (510) is provided on the outer surface of the auxiliary straightening device (50). The rope (70) connects the first hoisting part (214) and the second hoisting part (510) to lower the deep-sea pile foundation (20).

5. A deep-sea pile foundation according to claim 2, characterized in that, The deep-sea pile foundation (20) is equipped with a straightening device (10), and the straightening device (10) is equipped with a straightening hole (110); The deep-sea pile foundation (20) is inserted through the straightening hole (110).

6. A deep-sea pile foundation according to claim 5, characterized in that, The axis of the straightening hole (110) is perpendicular to the seabed surface.

7. A deep-sea pile foundation according to claim 1, characterized in that, The diameter of the end of the second pile base (220) away from the first pile base (210) is smaller than the diameter of the end of the second pile base (220) closer to the first pile base (210).

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