Deep sea pile foundation pile sinking method

Abstract

The embodiment of the invention provides a deep sea pile foundation pile sinking method, and relates to the technical field of ocean engineering. A pile sinking method for a deep sea pile foundation comprises the steps that a centralizing device is lowered to a seabed surface; a righting hole is formed in the righting device, and the pile foundation is lowered and penetrates through the righting hole; the pile foundation is hammered through a pile hammer, so that the pile foundation sinks in the righting hole, and the pile foundation sinks into the seabed surface; removing and recovering the centralizing device; and the pile foundation is provided with a suction opening, the mixture in the pile foundation is sucked from the suction opening through a suction pump, and the pile foundation continues to sink into the seabed surface. According to the deep sea pile foundation pile sinking method, the pile sinking efficiency of the pile foundation can be improved.

Description

Technical Field

[0001] The present application relates to the field of marine engineering technology, and in particular to a deep-sea pile foundation sinking method. Background Art

[0002] The ocean has a large amount of oil and gas resources. To exploit these resources, a drilling platform needs to be built. Pile foundation is one of the important infrastructures to support the drilling platform, ensuring the stable operation of the drilling platform in the marine environment.

[0003] The transport ship transports the pile foundation to the designated marine operation area. After the transport ship arrives at the designated location, the pile foundation is lifted from the ship and lowered to the designated location in the sea by the floating crane or lifting device on the transport ship. Subsequently, the pile hammer device is started to apply hammer force to the pile foundation, sinking the pile foundation into the mud layer of the seabed until the pile foundation reaches the required depth.

[0004] However, the seabed conditions are relatively complex, including soft mud, rocks and sand layers, etc. The pile foundation is affected by the seabed conditions during the pile sinking process, making the pile sinking efficiency low. In addition, the low temperature, high pressure and poor visibility in the seabed environment further reduce the efficiency of pile sinking. Summary of the invention

[0005] In view of the above problems, an embodiment of the present application provides a deep-sea pile foundation sinking method, which can improve the pile foundation sinking efficiency.

[0006] In order to achieve the above objectives, the embodiments of the present application provide the following technical solutions:

[0007] The present application provides a deep-sea pile foundation sinking method, comprising:

[0008] Lower the righting device to the seabed;

[0009] The straightening device is provided with a straightening hole, and the pile foundation is lowered and penetrated into the straightening hole;

[0010] The pile foundation is hammered by a pile driving hammer to make the pile foundation sink in the straightening hole and sink into the seabed surface;

[0011] remove and recover the righting device;

[0012] The pile foundation is provided with a suction port, and the mixture in the pile foundation is sucked out from the suction port by a suction pump, and the pile foundation continues to sink and sinks into the seabed surface.

[0013] In some embodiments, before lowering the pile foundation, the process includes:

[0014] Install the auxiliary righting device at the lower middle part of the pile foundation.

[0015] In some embodiments, after the pile foundation is inserted into the straightening hole, the method includes:

[0016] Remove and recover the auxiliary righting device.

[0017] In some embodiments, the pile foundation is sunk to 3-5 meters above the righting device, and the righting device is removed and recovered.

[0018] In some embodiments, after lowering the righting device to the seabed surface, the method includes:

[0019] The state of the righting device is adjusted by an underwater robot so that the axis of the righting hole is perpendicular to the seabed surface.

[0020] In some embodiments, the pile foundation includes a first pile foundation portion and a second pile foundation portion, the first pile foundation portion being provided with a penetration cavity with an opening;

[0021] 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 is coaxially arranged with the first pile base.

[0022] In some embodiments, the suction port is disposed on a side of the first pile base portion facing away from the port, and the suction port is communicated with an inlet of a suction pump.

[0023] In some embodiments, a first hoisting portion is provided on the outer surface of the first pile base; an auxiliary straightening device is installed at the middle and lower part of the pile base, and a second hoisting portion is provided on the outer surface of the auxiliary straightening device;

[0024] The pile foundation is lowered by connecting the first hoisting part and the second hoisting part through ropes.

[0025] In some embodiments, the piling hammer is configured as a hydraulic piling hammer.

[0026] In some embodiments, the righting device is configured as a hydraulic righting device.

[0027] The embodiment of the present application provides a deep-sea pile foundation sinking method: first, a straightening device is lowered to the seabed surface so that the pile foundation remains in a vertical state during the installation process. Next, the straightening device is provided with a straightening hole, and the pile foundation is lowered and penetrated into the straightening hole. In this way, the position or tilt state of the pile foundation can be adjusted. Then, the pile foundation is hammered by a pile driver, so that the pile foundation sinks in the straightening hole and sinks into the seabed surface. The pile driver can transmit the impact force to the pile foundation through high-speed and high-frequency hammering, so that the pile foundation sinks quickly and improves the pile sinking efficiency of the pile foundation. Subsequently, the straightening device is removed and recovered. By recycling and reusing the straightening device, resources can be saved. Finally, the pile foundation is provided with a suction port, and the mixture in the pile foundation is sucked from the suction port by a suction pump, and the pile foundation continues to sink and sinks into the seabed surface. The pile foundation is hammered by a pile driver and works in conjunction with the suction pump. Under the combined effects of gravity on the pile foundation, the impact force of the pile hammer, and the negative pressure generated by the suction pump on the pile foundation, the sinking speed of the pile foundation is accelerated and the pile sinking efficiency of the pile foundation is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A flowchart of the steps of the deep-sea pile foundation sinking method provided in the embodiment of the present application;

[0030] Figure 2 A schematic diagram of the structure of a pile foundation provided in an embodiment of the present application;

[0031] Figure 3 A schematic diagram of the process of lowering the righting device provided in an embodiment of the present application;

[0032] Figure 4 A schematic diagram of the process of lowering the pile foundation provided in the embodiment of the present application;

[0033] Figure 5 A schematic diagram of a process of inserting a pile foundation into a straightening device provided in an embodiment of the present application;

[0034] Figure 6 A schematic diagram of a process for removing and recovering an auxiliary righting device provided in an embodiment of the present application;

[0035] Figure 7 A schematic diagram of a first process of a pile driving hammer hammering a pile foundation provided by an embodiment of the present application;

[0036] Figure 8 A schematic diagram of a second process of a pile driving hammer hammering a pile foundation provided by an embodiment of the present application;

[0037] Fig. 9 A schematic diagram of a process for removing and recovering a righting device provided in an embodiment of the present application;

[0038] Fig.10 A schematic diagram of the completion of pile sinking of the pile foundation provided in an embodiment of the present application.

[0039] Description of reference numerals:

[0040] 10-righting device; 110-righting hole;

[0041] 20- pile foundation;

[0042] 210 - first pile base; 211 - suction port; 212 - penetration cavity; 213 - opening; 214 - first hoisting part; 220 - second pile base;

[0043] 30-Pile hammer;

[0044] 40-Suction pump;

[0045] 50- auxiliary righting device;

[0046] 510-second hoisting section;

[0047] 60- underwater robot;

[0048] 70-Rope;

[0049] L-sea surface; M-seabed surface. DETAILED DESCRIPTION

[0050] As described in the background technology, in the related art, a transport ship transports the pile foundation to a predetermined marine operation area. After the transport ship arrives at the designated location, the pile foundation is lifted from the ship and lowered to the predetermined location in the sea by a floating crane or a lifting device on the transport ship. Subsequently, the pile hammer device is started to apply a hammering force to the pile foundation, sinking the pile foundation into the mud layer of the seabed until the pile foundation reaches the required depth.

[0051] The seabed conditions are complex, including soft mud, rock and sand layers. These different types of mud layers have different mechanical properties and bearing capacities, which cause the pile foundation to be subjected to uneven resistance and deformation during the pile sinking process, increasing the difficulty of pile sinking and reducing the efficiency of pile sinking. At the same time, the low temperature in the seabed environment may cause the pile body material to become brittle and reduce the bearing capacity, the high pressure may cause the pile body material to deform and damage, and the poor visibility increases the difficulty of construction monitoring and measurement. These factors further reduce the efficiency of pile sinking.

[0052] In view of this, an embodiment of the present application provides a deep-sea pile foundation sinking method. First, a straightening device is lowered to the seabed surface so that the pile foundation remains in a vertical state during the installation process. Next, the straightening device is provided with a straightening hole, and the pile foundation is lowered and penetrated into the straightening hole. In this way, the position or tilt state of the pile foundation can be adjusted. Then, the pile foundation is hammered by a pile driver, so that the pile foundation sinks in the straightening hole and sinks into the seabed surface. The pile driver can transmit the impact force to the pile foundation through high-speed and high-frequency hammering, so that the pile foundation sinks quickly and improves the pile sinking efficiency of the pile foundation. Subsequently, the straightening device is removed and recovered. By recycling and reusing the straightening device, resources can be saved. Finally, the pile foundation is provided with a suction port, and the mixture in the pile foundation is sucked from the suction port by a suction pump, and the pile foundation continues to sink and sinks into the seabed surface. The pile foundation is hammered by a pile driver and works in conjunction with the suction pump. Under the combined effects of gravity on the pile foundation, the impact force of the pile hammer, and the negative pressure generated by the suction pump on the pile foundation, the sinking speed of the pile foundation is accelerated and the pile sinking efficiency of the pile foundation is improved.

[0053] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of this application.

[0054] An embodiment of the present application provides a deep-sea pile foundation driving method, which is used to install and fix the pile foundation in a deep-sea environment.

[0055] Reference Figure 1 As shown, first, the straightening device is lowered to the seabed surface so that the pile foundation can remain in a vertical state during the installation process. Next, the straightening device is provided with a straightening hole, and the pile foundation is lowered and penetrated into the straightening hole. In this way, the position or tilt state of the pile foundation can be adjusted. Then, the pile foundation is hammered by a pile driver, so that the pile foundation sinks in the straightening hole and sinks into the seabed surface. The pile driver can transmit the impact force to the pile foundation through high-speed and high-frequency hammering, so that the pile foundation sinks quickly and improves the pile sinking efficiency of the pile foundation. Subsequently, the straightening device is removed and recycled. By recycling and reusing the straightening device, resources can be saved. Finally, the pile foundation is provided with a suction port, and the mixture in the pile foundation is sucked from the suction port by a suction pump, and the pile foundation continues to sink and sinks into the seabed surface. The pile foundation is hammered by a pile driver and works in conjunction with the suction pump. Under the combined effects of gravity on the pile foundation, the impact force of the pile hammer, and the negative pressure generated by the suction pump on the pile foundation, the sinking speed of the pile foundation is accelerated and the pile sinking efficiency of the pile foundation is improved.

[0056] Reference Figure 2 As shown, the pile foundation 20 provided in the embodiment of the present application can provide support for large structures (such as offshore platforms, bridges, and docks). The pile foundation 20 is embedded in the soil or rock formation under the seabed surface to transfer the load to a deeper stratum, thereby providing bearing capacity for the large structure.

[0057] The pile foundation 20 includes a first pile foundation part 210 and a second pile foundation part 220. The first pile foundation part 210 is provided with a penetration cavity 212 with an opening 213. The second pile foundation part 220 is connected to the bottom of the penetration cavity 212 of the first pile foundation part 210 through the opening 213. The second pile foundation part 220 is thinner and longer than the first pile foundation part 210. During the pile sinking process of the pile foundation 20, the pile foundation 20 is installed vertically, and the second pile foundation part 220 is sunk into the seabed first.

[0058] After the pile foundation 20 is installed, the stability of the pile foundation 20 is maintained by the friction between the outer surface of the first pile base 210 and the surrounding soil, the friction between the outer surface of the second pile base 220 and the surrounding soil, and the end bearing force of the pile tip of the second pile base 220. In addition, the pile foundation 20 can be embedded in the soil by applying negative pressure in the penetration cavity 212 of the first pile base 210 to maintain the stability of the pile foundation 20.

[0059] Compared with the common pile foundation, the pile foundation 20 can improve the pull-out bearing capacity of the pile foundation 20 by applying negative pressure through the outer surface of the first pile foundation part 210, the outer surface of the second pile foundation part 220 and the penetration cavity 212 of the first pile foundation part 210. The pile foundation 20 includes the first pile foundation part 210 and the second pile foundation part 220, which increases the weight of the pile foundation 20. The heavier pile foundation 20 can better resist the upward pull-out force, and the pull-out bearing capacity of the pile foundation 20 can be further improved.

[0060] When the pile foundation 20 is installed, the pile foundation 20 may be affected by factors such as hammering and vibration, resulting in cracks in the first pile base 210 and the second pile base 220. The top of the second pile base 220 is connected to the bottom of the penetration cavity 212 of the first pile base 210 by welding to improve the reliability of the pile foundation 20.

[0061] The second pile foundation 220 is coaxially arranged with the first pile foundation 210 to improve the uniformity of the pile foundation 20 when subjected to force, thereby preventing the pile foundation 20 from tilting or becoming unstable due to eccentric force, and improving the bearing capacity and anti-overturning capacity of the pile foundation 20.

[0062] Before the pile foundation 20 is lowered, the preparation work for lowering can be completed. The pile foundation 20 and the related pile sinking equipment are transported to the designated location by a transport ship. After the related pile sinking equipment (straightening device, measuring device) of the pile foundation 20 are fully prepared, the pile foundation 20 and the related pile sinking equipment are inspected for damage or defects. Then, the auxiliary straightening device 50 is installed in the middle and lower part of the pile foundation 20 near the bottom. The pile foundation 20 with the auxiliary straightening device 50 installed is sunk from the transport ship through the sea surface L into the sea.

[0063] In a seawater environment, the pile foundation 20 is subjected to the combined effects of gravity and buoyancy or other forces (wave force). By adjusting the auxiliary straightening device 50, the center of gravity of the pile foundation 20 and the auxiliary straightening device 50 installed together is adjusted so that the forces are balanced and the pile foundation 20 is kept in a vertical state during the sinking process. In this way, the verticality of the pile foundation 20 can be maintained during the lowering process, which is beneficial to the subsequent sinking of the pile foundation 20.

[0064] The present application provides a deep-sea pile foundation sinking method, and the specific steps are as follows:

[0065] S110. Lower the righting device to the seabed.

[0066] Reference Figure 3 As shown, the stabilizing device 10 is lowered to the seabed surface M by the lifting equipment on the transport ship, and the seabed surface M can provide a stable installation surface for the stabilizing device 10, reducing the impact of the external environment on the stabilizing device 10. In the marine environment, water currents and waves may cause the pile foundation 20 to deviate from the predetermined position or tilt during the pile sinking process. The stabilizing device 10 can keep or adjust the pile foundation 20 to a vertical state during the installation stage of the pile sinking, preventing the pile foundation 20 from tilting or shifting during the sinking process, thereby improving the installation accuracy of the pile foundation 20.

[0067] In some embodiments, the straightening device 10 is configured as a hydraulic straightening device, which can provide greater torque and power, so that the hydraulic straightening device can quickly complete straightening and alignment operations of the pile foundation 20, thereby improving work efficiency.

[0068] The straightening device 10 includes a clamping ring assembly. The clamping ring assembly can wrap the pile foundation 20 to ensure the stability of the pile foundation 20 during installation. The clamping ring structure is usually made of high-strength material to withstand the huge pressure generated when the pile foundation 20 is inserted into the seabed.

[0069] The stabilizing device 10 includes a swing frame assembly, which enables the stabilizing device 10 to adapt to the seabed topography and the slight deviation of the pile foundation 20, thereby improving the stability and flexibility of the stabilizing device 10 in a complex seabed environment.

[0070] The righting device 10 includes a fixing frame. The fixing frame is a supporting structure of the righting device 10 and is used to fix the righting device 10 on the seabed surface M. The fixing frame can be made of strong steel or other high-strength materials to ensure its stability and durability.

[0071] The straightening device 10 includes a roll compensation hydraulic cylinder. By adjusting the extension and contraction of the hydraulic cylinder, the position or vertical state of the pile foundation 20 can be accurately controlled to ensure the verticality and stability of the pile foundation 20.

[0072] The clamping ring assembly is connected to the swing frame, and the swing frame is connected to the upper end of the fixed frame through 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 straightening device 10.

[0073] The stabilizing device 10 further comprises a base plate to improve the stability and accuracy of the pile foundation 20 during installation.

[0074] 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 to ensure the accurate installation of the subsequent pile foundation 20.

[0075] Because the underwater robot 60 has flexibility and high precision, it can operate in the environment of the ocean. The underwater robot 60 observes and feeds back the state of the righting device 10, and adjusts the righting device 10 accordingly.

[0076] Reference Figure 4 As shown, in some embodiments, the outer surface of the first pile base 210 is provided with a first hoisting portion 214 for hoisting during the lowering process of the pile foundation 20. The first hoisting portion 214 can be configured as a lifting lug, a lifting ring, a lifting hook or other parts, which can withstand the gravity during the lowering process of the pile foundation 20.

[0077] The outer surface of the auxiliary straightening device 50 is provided with a second hoisting part 510, which is used for hoisting during the lowering process of the pile foundation 20. The second hoisting part 510 can be set as a lifting ear, a lifting ring, a hook and other parts, which can withstand the gravity during the lowering process of the pile foundation 20.

[0078] One end of the rope 70 is connected to the first hoisting part 214, and the other end is connected to the second hoisting part 510. The rope 70 is also connected to the hoisting equipment of the transport ship. By controlling the hoisting equipment, the lowering speed and position of the pile foundation 20 can be controlled. After the hoisting equipment lifts the pile foundation 20 from the transport ship, it is lowered into the sea water. The pile foundation 20 is adjusted to a vertical state by adjusting the rope 70, and then the pile foundation 20 is placed in a vertical state by the auxiliary straightening device 50. Through the first hoisting part 214 and the second hoisting part 510, the use time of the pile foundation 20 equipment during the hoisting process is reduced, and the installation efficiency of the pile foundation 20 can be improved.

[0079] S120, the straightening device is provided with a straightening hole, and the pile foundation is lowered and passed through the straightening hole.

[0080] Reference Figure 5 and Figure 6 As shown, the straightening device 10 is further provided with a straightening hole 110. Specifically, the straightening hole 110 is formed by a clamping ring assembly. The pile foundation 20 is inserted into the straightening hole 110 to adjust the position or tilt state of the pile foundation 20.

[0081] After the straightening device 10 is lowered to the mudline seabed surface M, the pile foundation 20 is lowered by the rope 70, and the pile foundation 20 is inserted into the straightening hole 110. In this way, the pile foundation 20 is installed in the straightening device 10, and the state of the pile foundation 20 is adjusted before the pile foundation 20 is sunk into the seabed to prevent it from tilting or shifting. In addition, the straightening device 10 can also provide a support foundation for the pile foundation 20.

[0082] In some embodiments, after the pile foundation 20 is inserted into the straightening hole 110, the auxiliary straightening device 50 can no longer adjust the state of the pile foundation 20. The auxiliary straightening device 50 is removed from the pile foundation 20 and recycled. By recycling the auxiliary straightening device 50, it can be used in the installation process of other pile foundations 20, thereby reducing the cost of installing other pile foundations 20.

[0083] In addition, when the auxiliary straightening device 50 is on the pile foundation 20, the contact area between the pile foundation 20 and the surrounding soil is increased, thereby increasing the friction resistance. Removing the auxiliary straightening device 50 from the pile foundation 20 can reduce the resistance of the pile foundation 20 during the pile sinking process, and further improve the pile sinking efficiency of the pile foundation 20.

[0084] Specifically, the auxiliary righting device 50 is removed by the underwater robot 60 to improve the installation efficiency of the pile foundation 20 .

[0085] S130. The pile foundation is hammered with a pile hammer to make the pile foundation sink in the straightening hole and sink into the seabed.

[0086] Reference Figure 7 As shown, after the pile foundation 20 is lowered and inserted into the straightening hole 110. After the pile foundation 20 is straightened by the straightening device 10, the next step of installation can be carried out. Since the pile foundation 20 is relatively heavy, the pile foundation 20 will automatically sink under the action of gravity, and the lower end of the pile foundation 20 will sink into the seabed surface M. However, the depth to which the pile foundation 20 sinks by its own weight is limited. In order to drive the pile foundation 20 to a predetermined depth, the pile foundation 20 is hammered by a pile hammer 30, so that the pile foundation 20 sinks in the straightening hole 110, and the pile foundation 20 sinks into the seabed surface M. The pile hammer 30 can transmit the impact force to the pile foundation 20 through the high-speed and high-frequency hammering force, so that the pile foundation 20 sinks quickly.

[0087] Specifically, the second pile base 220 first contacts the seabed surface M, and the lower end of the second pile base 220 is set to be thinner. Under the action of gravity and the pile hammer 30, the pressure at the lower end of the second pile base 220 will be greater, so that the pile foundation 20 can easily penetrate into a deeper or harder soil layer, which can reduce energy consumption during the piling process.

[0088] The resistance of the lower end of the slender pile foundation 20 during the sinking process of the pile foundation 20 is relatively small, so the required depth can be reached more easily, thereby improving the sinking efficiency of the pile foundation 20 .

[0089] In some embodiments, the pile hammer 30 is configured as a hydraulic pile hammer. The hydraulic system of the hydraulic pile hammer can provide hammering force. The hydraulic system has the characteristics of adjustable pressure and controllable energy. The magnitude of the hammering force can be controlled by adjusting the pressure of the hydraulic system. This ensures that the pile foundation 20 will not be damaged by excessive force during the hammering process.

[0090] The hydraulic pile hammer includes an intelligent control system, which enables the hydraulic pile hammer to monitor various data in the hammering process in real time, such as impact force, pile sinking depth, etc. When the data is abnormal or reaches a preset value, the intelligent control system will automatically alarm and take corresponding protective measures, thereby ensuring the safety and reliability of the pile sinking of the pile foundation 20.

[0091] Since the energy conversion efficiency of the hydraulic system is high, the noise of the hydraulic pile hammer during the hammering process is relatively small, which meets the requirements of environmental protection.

[0092] S140. Remove and recover the righting device.

[0093] Reference Figure 8 and Fig. 9 As shown, after the pile foundation 20 is hammered into the seabed M to a certain depth by the pile hammer 30, the friction between the pile foundation 20 and the soil on the seabed M will increase, so that the pile foundation 20 has a certain pull-out resistance and tilt resistance.

[0094] The straightening device 10 can maintain verticality and guide the sinking of the pile foundation 20 in the early stage of 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 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 pile foundation 20 to continue to sink.

[0095] The straightening device 10 can be recycled. The straightening device 10 is a common facility in the installation of the pile foundation 20, and its service life is usually long. Therefore, the straightening device 10 can be recycled and reused. By recycling and reusing the straightening device 10, resources can be saved and the generation of construction waste can be reduced.

[0096] If the first pile base 210 of the pile foundation 20 sinks to a position 5 meters above the straightening device 10, the straightening device 10 is removed and recovered. At this time, the depth of the pile foundation 20 sunk into the soil is small, and it is easy to tilt under the action of waves or other external forces, resulting in a decrease in its bearing capacity and stability when sunk into the soil.

[0097] If the first pile base 210 of the pile foundation 20 sinks to 3 meters below the top of the straightening device 10 , friction, collision or compression may occur between the first pile base 210 and the straightening device 10 , thus affecting the quality of the pile foundation 20 .

[0098] In some embodiments, the 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 pile foundation 20 .

[0099] S150. The pile foundation is provided with a suction port, and the mixture in the pile foundation is sucked out from the suction port by a suction pump, and the pile foundation continues to sink, and the pile foundation sinks into the seabed.

[0100] Reference Fig.10 As shown, after the straightening device 10 is removed and recovered, the 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 pile foundation 20 is provided with a suction port 211. The suction pump 40 extracts the mixture (such as soil, seawater, etc.) in the penetration cavity 212 of the pile foundation 20 through the suction port 211. As the mixture is extracted, a negative pressure environment is formed in the penetration cavity 212. Under the action of the negative pressure, the pile foundation 20 is pressed into the surrounding soil. Moreover, the pile foundation 20 continues to sink under the hammering of the pile hammer 30, and the pile foundation 20 sinks into the seabed, completing the pile sinking process.

[0101] During the sinking process of the pile foundation 20, the pile hammer 30 hammers the pile foundation 20 and cooperates with the suction pump 40. Under the combined effect of gravity on the pile foundation 20, the impact force of the pile hammer 30, and the negative pressure generated by the suction pump 40 on the pile foundation 20, the sinking speed of the pile foundation 20 is accelerated, and the pile sinking efficiency of the pile foundation 20 is improved.

[0102] By controlling the power and suction speed of the suction pump 40 and continuously monitoring the sinking speed and depth of the pile foundation 20 , it is possible to ensure that the pile foundation 20 reaches a predetermined design depth and provides good bearing capacity and stability.

[0103] Furthermore, a bracket is provided at the top of the pile foundation 20 , which can be used to fix the suction pump 40 to ensure the stability of the suction pump 40 .

[0104] In some embodiments, the suction port 211 is disposed on the side of the first pile base 210 away from the outlet 213. That is, the suction port 211 of the first pile base 210 is disposed at the top of the penetration cavity 212 close to the first pile base 210. The inlet of the suction pump 40 is connected with the suction port 211, so that the mixture in the penetration cavity 212 can be pumped out to ensure that the penetration cavity 212 is in a negative pressure state, and the first pile base 210 sinks under the action of the negative pressure.

[0105] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0106] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, components, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, components, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0107] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A deep sea pile foundation sinking method, characterized in that: include: Lowering the righting device (10) to the seabed surface; The straightening device (10) is provided with a straightening hole (110), and the pile foundation (20) is lowered and penetrated into the straightening hole (110); Hammering the pile foundation (20) with a pile hammer (30) to make the pile foundation (20) sink in the straightening hole (110), and the pile foundation (20) sinks into the seabed surface; removing and recovering the righting device (10); The pile foundation (20) is provided with a suction port (211), and the mixture in the pile foundation (20) is sucked from the suction port (211) by a suction pump (40), and the pile foundation (20) continues to sink, and the pile foundation (20) sinks into the seabed surface.

2. The deep sea pile foundation sinking method according to claim 1, characterized in that: Before lowering the pile foundation (20), the process includes: An auxiliary straightening device (50) is installed at the middle and lower part of the pile foundation (20).

3. The deep sea pile foundation sinking method according to claim 2, characterized in that: After the pile foundation (20) is inserted into the straightening hole (110), the method includes: The auxiliary righting device (50) is removed and recovered.

4. The deep-sea pile foundation sinking method according to any one of claims 1 to 3, characterized in that: The pile foundation (20) is sunk to 3-5 meters above the straightening device (10), and the straightening device (10) is removed and recovered.

5. The deep-sea pile foundation sinking method according to any one of claims 1 to 3, characterized in that: After lowering the righting device (10) to the seabed surface, the method comprises: The state of the righting device (10) is adjusted by an underwater robot (60) so that the axis of the righting hole (110) is perpendicular to the seabed surface.

6. The deep sea pile foundation sinking method according to claim 1, characterized in that: The pile foundation (20) comprises a first pile foundation part (210) and a second pile foundation part (220), wherein the first pile foundation part (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) is coaxially arranged with the first pile base (210).

7. The deep sea pile foundation sinking method according to claim 6, characterized in that: The suction port (211) is arranged on a side of the first pile base (210) away from the opening (213), and the suction port (211) is communicated with an inlet of the suction pump (40).

8. The deep sea pile foundation sinking method according to claim 6, characterized in that: The first pile base (210) is provided with a first hoisting portion (214) on its outer surface; an auxiliary straightening device (50) is installed at the middle and lower part of the pile base (20), and the auxiliary straightening device (50) is provided with a second hoisting portion (510) on its outer surface; The pile foundation (20) is lowered by connecting the first hoisting part (214) and the second hoisting part (510) via a rope (70).

9. The deep sea pile foundation sinking method according to claim 1, characterized in that: The pile hammer (30) is configured as a hydraulic pile hammer.

10. The deep sea pile foundation sinking method according to claim 1, characterized in that: The righting device (10) is configured as a hydraulic righting device.

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