Jacket pile shoe and steel pipe pile rapid connection joint and construction method
By using a steel-structured guide frame pile shoe to quickly connect steel pipe piles, and employing high-strength bolt devices and mechanical connections, the problems of insufficient mechanical properties and uncontrollable construction quality in grouting connections are solved, achieving a high-rigidity, reliable connection and easy maintenance.
Patent Information
- Application Number
- CN202511778731.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-28
- Publication Date
- 2026-02-10
AI Technical Summary
The existing grouting connection method between pile shoes and steel pipe piles has problems such as insufficient mechanical properties, uncontrollable construction quality, and difficulty in later maintenance, which affects the bearing capacity and reliability of the structure.
The steel-structured guide frame pile shoe and steel pipe pile quick connection node are used, and the mechanical connection is achieved through a high-strength bolt device. The connecting flange is arranged on the outside for easy maintenance, and construction methods such as overall hoisting and water launching and hydraulic hammer pile driving are adopted.
It improves the stiffness and load-bearing capacity of the connection, ensures controllable construction quality, reduces operation and maintenance costs, facilitates maintenance, avoids stress concentration and hidden dangers, and enhances the reliability and stability of the structure.
Smart Images
Figure CN121496964A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to a pile shoe structure, in particular to a jacket pile shoe and steel pipe pile quick connection node and a construction method. BACKGROUND
[0003] In the whole offshore wind power system, the offshore booster station and the converter station play a crucial role as a hub, bearing the key function of collecting wind turbine generator power and transmitting it to the onshore power grid. The structural safety and reliability are directly related to the long-term stable operation of the wind farm. At present, the pile shoe type jacket is the most commonly used form of lower foundation in offshore booster stations and converter stations. This type of structure has many advantages, such as good stress performance, strong overall stability, relatively mature construction and installation, and good adaptability to complex marine environmental conditions, so it is widely used in engineering practice.
[0004] At present, the connection between the pile shoe and the steel pipe pile is mainly by grouting.
[0005] The grouting connection mainly has the following disadvantages:
[0006] (1) Insufficient mechanical properties: the elastic modulus of grouting material is much lower than that of steel. When subjected to large bending moment and shear force, stress concentration is easy to occur, which leads to cracks or even crushing of grouting material, seriously affecting the bearing capacity and connection reliability;
[0007] (2) Uncontrollable construction quality: grouting construction is a concealed project, and the compactness is difficult to verify directly. Once there are bubbles, inclusions or cavities in the grouting body, the bearing capacity will be significantly reduced, and even structural hazards may be buried;
[0008] (3) Difficult to maintain in the long run: the grouting layer is located between the pile shoe and the steel pipe pile, and the detection means is limited. The maintenance and repair operation is complex and costly, and the long-term service performance is difficult to guarantee.
[0009] Therefore, the existing technology urgently needs a connection method that can solve the above-mentioned shortcomings. SUMMARY
[0010] The present application discloses a pile shoe node structure with the advantages of convenient construction, controllable construction quality, low cost, good anti-scour effect, etc.
[0011] The application discloses a jacket pile shoe and steel pipe pile quick connection node, which comprises a pile shoe body, a connecting flange, a jacket, a steel pipe pile, a yoke plate and a stiffener plate.
[0012] The pile shoe body is a cylindrical structure and is connected with the bottom of the jacket through the yoke plate;
[0013] The yoke plate comprises an upper yoke plate, a middle yoke plate and a lower yoke plate, and the left and right ends of the upper yoke plate, the middle yoke plate and the lower yoke plate are annular, and are respectively sleeved with the top, the middle and the lower part of the pile shoe and the pile shoe;
[0014] The stiffening plate comprises a pile shoe stiffening plate and a steel pipe pile stiffening plate; the pile shoe stiffening plate is arranged outside the pile shoe; and the steel pipe pile stiffening plate is arranged at the pile head position of the steel pipe pile body;
[0015] The connecting flange comprises a pile shoe connecting flange and a steel pipe pile connecting flange; the pile shoe connecting flange is arranged at the top of the pile shoe, and the steel pipe pile flange is arranged at the lower end of the steel pipe pile stiffening plate;
[0016] When connected, the steel pipe pile body is inserted into the inside of the pile shoe, and the connection state is reached when the pile shoe connecting flange and the steel pipe pile connecting flange are in contact, and the pile shoe connecting flange and the steel pipe pile connecting flange are fixed, so that the connection is achieved.
[0017] In a preferred example, bolt holes are reserved on the connecting flange.
[0018] In a preferred example, the pile shoe connecting flange and the steel pipe pile connecting flange are fixed by bolts, and the bolts are configured as reinforcing bolts.
[0019] In a preferred example, the bottom of the pile shoe is further provided with an anti-sinking plate.
[0020] In a preferred example, the anti-sinking plate is connected with the lower yoke plate.
[0021] In a preferred example, all components in the connecting node are steel structures.
[0022] In a preferred example, the stiffening plates are vertically and uniformly distributed outside the pile shoe, and one end is connected with the pile shoe connecting flange and the other end is connected with the anti-sinking plate.
[0023] In a preferred example, the middle yoke plate connects each stiffening plate together.
[0024] The second aspect of the present application discloses a construction method, which comprises:
[0025] S1: component manufacturing:
[0026] The guide pipe frame and the steel pipe pile are manufactured on land in advance; the key components such as the pile shoe body, the steel pipe pile body, the connecting flange and the stiffening plate are respectively processed, and are assembled into an integral structure by welding;
[0027] S2: guide pipe frame launching:
[0028] Due to the large area of the anti-sinking plate at the bottom of the pile shoe, in order to ensure the structural stability and launching safety, it is recommended to use the integral lifting launching or vertical sliding launching process. After launching, the plane orientation and direction of the jacket are fine-tuned by the floating crane or tugboat to ensure uniform contact between the pile shoe and the seabed and form a good stress state;
[0029] S3: pile sinking operation:
[0030] The steel pipe pile is introduced from the top of the pile shoe, precisely positioned by the guide device and sunk to the self-sinking depth. Then the hydraulic hammer is used to implement pile driving until the top flange of the steel pipe pile is tightly attached to the flange of the pile shoe. During the pile sinking process, the steel pipe pile needs to be rotated to ensure that the bolt holes of the steel pipe pile flange are accurately aligned with the bolt holes of the pile shoe flange;
[0031] S4: bolt connection and fixation:
[0032] After the flanges are aligned, high-strength bolts and nuts are installed in sequence. During the installation process, the special nut tightening machine is used to uniformly tighten the nuts in stages and diagonally to ensure uniform stress distribution of the bolts and avoid local stress concentration.
[0033] The main advantages of the present application are:
[0034] (1) The overall structure of the present application is steel, which has high stiffness and bearing capacity: the mechanical connection realizes direct force transmission through high-strength bolts, which can effectively avoid the stress concentration problem caused by the weak layer of grouting material in the grouting connection of the prior art.
[0035] (2) The installation process of the mechanical connection used in the present application is intuitive and controllable, and the connection state can be verified by conventional non-destructive testing methods, so the quality controllability is high.
[0036] (3) The flanges of the connection structure of the present application are arranged on the outside, which is easy to maintain and replace: once a problem is found, the mechanical connection node can be disassembled or replaced, which greatly reduces the operation and maintenance cost and risk, and the mechanical connection used in the present application has been widely used in steel structure engineering, with high standardization degree, mature design method and construction technology.
[0037] A large number of technical features are described in the specification of the present application, which are distributed in various technical solutions. If all possible combinations of technical features (i.e. technical solutions) of the present application are listed, the specification will be too long. In order to avoid this problem, each technical feature disclosed in the above summary of the application, each technical feature disclosed in the following various embodiments and examples, and each technical feature disclosed in the drawings can be freely combined to form various new technical solutions (which should be considered as having been described in the specification), unless such combination of technical features is technically infeasible. For example, features A+B+C are disclosed in one example, features A+B+D+E are disclosed in another example, features C and D are equivalent technical means that play the same role and can only be used in one, and feature E can be combined with feature C in technology. Therefore, the solution of A+B+C+D should not be considered as having been described because it is technically infeasible, and the solution of A+B+C+E should be considered as having been described. BRIEF DESCRIPTION OF DRAWINGS
[0038] Fig. 1 is a schematic diagram of the pile shoe structure of the quick connection node described in the present application;
[0039] Fig. 2 is a schematic diagram of the specific structure of the steel pipe pile described in the present application;
[0040] Fig. 3 is a schematic diagram of the structure of the quick connection node after installation described in the present application.
[0041] BRIEF DESCRIPTION OF DRAWINGS
[0042] 1 - pile shoe connecting flange; 2 - pile shoe stiffening plate; 3 - pile shoe main body; 4 - anti-sinking plate; 5 - jacket main leg; 6 - yoke plate; 7 - steel pipe pile stiffening plate; 8 - steel pipe pile connecting flange; 9 - steel pipe pile main body; 10 - high-strength bolt. DETAILED DESCRIPTION
[0043] Through in-depth and extensive research, the inventors of this invention have developed a quick connection node between the guide frame pile shoe and the steel pipe pile. Compared with existing technologies, the solution of this application is an overall steel structure with high rigidity and bearing capacity. The mechanical connection achieves direct force transmission through a high-strength bolt device, effectively avoiding the stress concentration problem caused by the weak layer of grouting material in grouting connections in existing technologies. Furthermore, the mechanical connection installation process used in this invention is intuitive and controllable, and the connection status can be verified through conventional non-destructive testing methods, ensuring high quality control. The flange of the connection structure is located on the outside, facilitating maintenance and replacement. If a problem is found, the mechanical connection node can be disassembled or replaced, significantly reducing operation and maintenance costs and risks. Moreover, the mechanical connection used in this invention has been widely used in steel structure engineering, with a high degree of standardization and mature design methods and construction techniques.
[0044] Example
[0045] This application is implemented for example Figs. 1-3 As shown, a quick connection node between a jacket pile shoe and a steel pipe pile is disclosed. All components in the connection node described in this embodiment are steel structures. The connection node includes: a pile shoe body 3, a connecting flange, a jacket main leg 5, a steel pipe pile, a yoke plate 6, an anti-sinking plate 4, and a stiffening plate, wherein:
[0046] The main body 3 of the pile shoe is a cylindrical structure and is connected to the bottom of the main leg 5 of the guide frame through the yoke plate 6;
[0047] The yoke plate 6 includes an upper yoke plate, a middle yoke plate, and a lower yoke plate. The left and right ends of the upper yoke plate and the middle yoke plate are circular and respectively sleeve the top and middle of the guide frame and the pile shoe. Optionally, in one embodiment, the middle yoke plate connects each of the stiffening plates together.
[0048] The dustproof plate 4 is disposed at the bottom of the pile shoe body 3, and one end of the lower yoke plate is connected to the main leg 5 of the guide frame, and the other end is connected to the anti-sinking plate 4.
[0049] The stiffening plates include a pile shoe stiffening plate 2 and a steel pipe pile stiffening plate 7; the pile shoe stiffening plate 2 is disposed on the outside of the pile shoe body 3; the steel pipe pile stiffening plate 7 is disposed at the pile head position of the steel pipe pile body 9. Optionally, in one embodiment, the stiffening plates are vertically and evenly distributed on the outside of the pile shoe, with one end connected to the pile shoe connecting flange and the other end connected to the anti-settlement plate.
[0050] The connecting flange includes a pile shoe connecting flange 1 and a steel pipe pile connecting flange 8; the pile shoe connecting flange 1 is disposed on the top of the pile shoe body 3, and the steel pipe pile connecting flange 8 is disposed at the lower end of the steel pipe pile stiffening plate 7.
[0051] Optionally, in an embodiment, bolt holes are reserved on the connecting flange, the pile shoe connecting flange 1 is fixed with the steel pipe pile connecting flange 8 through bolts, and the bolts are configured as high-strength bolts 10 after reinforcement.
[0052] In the connection of the embodiment, the steel pipe pile body 9 is inserted into the pile shoe body 3, and the connection state is reached when the pile shoe connecting flange contacts the steel pipe pile connecting flange, and the pile shoe connecting flange and the steel pipe pile connecting flange are fixed, so that the connection is achieved.
[0053] The embodiment also discloses a construction method suitable for the connecting node, and the construction method comprises the following steps.
[0054] S1: component manufacturing
[0055] The jacket and the steel pipe pile are manufactured on land in advance; the pile shoe body, the steel pipe pile body, the connecting flange, and the stiffening plate and other key components are respectively machined and assembled into an integral structure through welding; and the precasting in the factory can effectively guarantee the manufacturing precision and the welding quality.
[0056] S2: jacket launching
[0057] Since the anti-sinking plate at the bottom of the pile shoe has a large area, in order to guarantee the structural stability and the launching safety, the integral hoisting launching or the vertical sliding launching process is recommended. After launching, the floating crane or the tugboat is used to finely adjust the plane direction and the direction of the jacket, so that the pile shoe and the seabed are uniformly contacted and a good stress state is formed;
[0058] S3: pile sinking operation
[0059] The steel pipe pile is introduced from the top of the pile shoe, is precisely positioned by means of the guide device, and is sunk to the self-sinking depth. Then, the hydraulic hammer is used to implement pile driving until the top flange of the steel pipe pile is tightly attached to the flange of the pile shoe. During the pile sinking process, the steel pipe pile needs to be rotated to ensure that the bolt holes of the flange of the steel pipe pile are accurately aligned with the bolt holes of the flange of the pile shoe.
[0060] S4: bolt connection and fixation
[0061] After the flanges are aligned, the high-strength bolts and the nuts are sequentially installed; during the installation process, the special nut tightening machine is used to uniformly tighten the nuts in stages and in opposite corners, so that the bolt stress is uniform and local stress concentration is avoided. Thus, the pile shoe and the steel pipe pile are reliably mechanically connected, and the fixation operation is completed.
[0062] It has to be explained that the relationship terms such as first and second etc. used in the patent document of the present application are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including one" does not exclude the existence of other identical elements in the process, method, article or equipment including the element. In the patent document of the present application, if it is mentioned that a certain action is performed according to a certain element, it means that the action is performed at least according to the element, including two cases: the action is performed only according to the element, and the action is performed according to the element and other elements. The expressions of multiple, multiple times, multiple kinds etc. include 2, 2 times, 2 kinds and more than 2, more than 2 times, more than 2 kinds.
[0063] All the documents mentioned in the present application are considered to be included in the disclosure of the present application as a whole, so as to be used as a modification if necessary. In addition, it should be understood that the above is only the preferred embodiment of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement etc. within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of one or more embodiments of the present application.
Claims
1. A quick connection node between a guide frame pile shoe and a steel pipe pile, characterized in that, The connection node includes: a pile shoe body, a connecting flange, a guide frame, a steel pipe pile, a yoke plate, and a stiffening plate, wherein: The main body of the pile shoe is a cylindrical structure and is connected to the bottom of the guide frame through a yoke plate; The yoke plate includes an upper yoke plate, a middle yoke plate, and a lower yoke plate, and the left and right ends of the upper yoke plate, the middle yoke plate, and the lower yoke plate are circular, respectively connecting the top, middle, and lower parts of the guide frame and the pile shoe; The stiffening plate includes a pile shoe stiffening plate and a steel pipe pile stiffening plate; the pile shoe stiffening plate is disposed on the outside of the pile shoe; the steel pipe pile stiffening plate is disposed at the pile head position of the steel pipe pile body; The connecting flange includes a pile shoe connecting flange and a steel pipe pile connecting flange; the pile shoe connecting flange is disposed on the top of the pile shoe, and the steel pipe pile flange is disposed at the lower end of the steel pipe pile stiffening plate; During connection, the main body of the steel pipe pile is inserted into the pile shoe, and the connection is achieved when the pile shoe connecting flange contacts the steel pipe pile connecting flange. The pile shoe connecting flange and the steel pipe pile connecting flange are then fixed to achieve the connection.
2. The fast connection node according to claim 1, characterized in that, The connecting flange has pre-drilled bolt holes.
3. The fast connection node according to claim 2, characterized in that, The pile shoe connecting flange and the steel pipe pile connecting flange are fixed together by bolts, and the bolts are configured as reinforcing bolts.
4. The fast connection node according to claim 1, characterized in that, The bottom of the pile shoe is also equipped with an anti-sinking plate.
5. The fast connection node according to claim 4, characterized in that, The anti-sinking plate is connected to the lower yoke plate.
6. The fast connection node according to claim 1, characterized in that, All components in the connection node are made of steel.
7. The fast connection node according to claim 1, characterized in that, The stiffening plates are vertically and evenly distributed on the outside of the pile shoe, with one end connected to the pile shoe connecting flange and the other end connected to the anti-sinking plate.
8. The fast connection node according to claim 1, characterized in that, The central yoke plate connects the various stiffening plates together.
9. A construction method applicable to the rapid connection node as described in any one of claims 1-8, characterized in that, The construction method includes: S1: Component fabrication: The jacket and steel pipe piles are manufactured on land in advance; the key components such as the pile shoe body, steel pipe pile body, connecting flange and stiffening plate are processed separately and assembled into an integral structure by welding. S2: Jacket support drainage: Due to the large area of the anti-sinking plate at the bottom of the pile shoe, to ensure structural stability and launching safety, it is recommended to use an integral hoisting or vertical sliding launching process. After launching, the plane orientation and direction of the jacket should be finely adjusted by a floating crane or tugboat to ensure uniform contact between the pile shoe and the seabed, forming a good stress state. S3: Pile driving operation: The steel pipe pile is inserted from the top of the pile shoe, precisely positioned using a guiding device, and sunk to its self-sinking depth. A hydraulic hammer is then used for pile driving until the flange at the top of the steel pipe pile is tightly fitted with the flange of the pile shoe. During the pile driving process, the steel pipe pile needs to be rotated to ensure that the bolt holes of the steel pipe pile flange and the bolt holes of the pile shoe flange are precisely aligned. S4: Bolted connection for fixing: After the flanges are aligned, high-strength bolts and nuts are installed in sequence. During the installation process, the nuts are tightened in stages and diagonally evenly using a special nut tightening machine to ensure that the bolts are subjected to uniform force and to avoid local stress concentration.