A combined skirt and curtain based marine pile foundation fender structure

Abstract

The present application relates to the technical fields of ocean engineering, and particularly relates to a combined type ocean pile foundation anti-settling plate structure based on aprons and curtains, which comprises a sleeve set outside the ocean pile foundation and an anti-settling plate arranged at the bottom of the sleeve, the anti-settling plate comprises a plurality of aprons uniformly distributed around the bottom of the sleeve, a curtain is arranged at the interval between each two adjacent aprons, and each apron top is connected with the sleeve top through a diagonal bracing assembly. The combined type ocean pile foundation anti-settling plate structure based on aprons and curtains can not only effectively prevent the settlement of the pile foundation, but also resist the erosion of the sea current to the seabed, greatly improving the stability and safety of the ocean engineering structure. The flexible and detachable design also provides convenience for subsequent maintenance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ocean engineering, in particular to a combined ocean pile foundation anti-sinking plate structure based on a skirt plate and a curtain. BACKGROUND

[0002] In ocean engineering, especially in the construction of large structures such as oil and gas platforms and wind towers, the stability of the pile foundation is crucial. Due to the complexity of the seabed environment, the pile foundation is easily affected by factors such as water flow scouring and uneven seabed settlement, so a technology is needed to ensure the stability of the pile foundation.

[0003] Traditional anti-sinking plate technology is mainly used to increase the contact area between the pile foundation and the seabed, thereby dispersing the load of the pile foundation and reducing its sinking. These anti-sinking plates are usually fixed at the bottom of the pile foundation to provide sufficient support. Because the vertical bearing capacity of the seabed surface soil is weak and has a flow plasticity, even with the support of the anti-sinking plate, the jacket will still sink to a certain depth under the action of seawater scouring, resulting in the actual elevation of the platform after construction being lower than the design elevation; because the anti-sinking plate and the seabed surface are in plane contact, the anti-sinking plate has weak horizontal anti-sliding ability. In addition, the current practical engineering mostly uses an integrated anti-sinking plate, which has high economic and time costs in terms of installation, disassembly, and maintenance, and there is an urgent need for related technical innovation to improve the functionality of the anti-sinking plate in terms of scour protection, as well as the convenience of construction and safety maintenance.

[0004] Although traditional anti-sinking plates have solved the problem of pile foundation sinking to some extent, they have certain limitations in terms of seabed scour protection, maintenance convenience, structural performance optimization, environmental adaptability, and economic benefits. For example, traditional anti-sinking plates may not have a scour protection function, and once the seabed is scoured, the stability of the pile foundation will still be threatened. Most current anti-sinking plate designs lack consideration of the scour protection function, mainly because the understanding of the main function of the anti-sinking plate is often limited to its ability to disperse and transfer load, and not enough attention is paid to its ability to resist scouring. This design status quo poses a potential risk because scouring in the marine environment often occurs and inevitably reduces the stability and bearing safety of the marine pile foundation.

[0005] In addition, the current practical engineering mostly uses an integrated anti-sinking plate, which has high economic and time costs in terms of installation, disassembly, and maintenance, and there is an urgent need for related technical innovation to improve the convenience of the anti-sinking plate in terms of construction and safety maintenance. With the increasing development and utilization of marine resources, the requirements for anti-sinking plate technology are also constantly improving. This has prompted the continuous innovation of anti-sinking plate technology to meet the engineering needs in deeper water and more complex environments. SUMMARY

[0006] In view of the deficiencies in the prior art, the purpose of the present application is to provide a combined skirt and curtain based marine pile foundation anti-settlement plate structure which can not only effectively prevent the settlement of the pile foundation, but also resist the erosion of the sea current to the seabed, greatly improving the stability and safety of the marine engineering structure.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0008] A combined skirt and curtain based marine pile foundation anti-settlement plate structure, comprising a sleeve set on the outer side of the marine pile foundation and an anti-settlement plate arranged at the bottom of the sleeve, the anti-settlement plate comprising a plurality of skirts uniformly distributed around the bottom of the sleeve, a curtain being arranged at the interval between each adjacent two skirts, and each skirt top being connected with the sleeve top through a diagonal brace assembly.

[0009] As a further optimization scheme of the present application, an arc-shaped connecting piece is fixed to the inner end of each skirt, and all the arc-shaped connecting pieces are sequentially connected in a closed loop to form a sleeve ring, which is detachably connected to the bottom of the sleeve.

[0010] As a further optimization scheme of the present application, the adjacent two arc-shaped connecting pieces are connected by a mortise and tenon structure.

[0011] As a further optimization scheme of the present application, the diagonal brace assembly comprises a connecting rod and a hinge seat, and the two ends of the connecting rod are respectively hinged to the top of the sleeve and the top of the skirt through the hinge seat.

[0012] As a further optimization scheme of the present application, the connecting rod comprises a hydraulic rod.

[0013] As a further optimization scheme of the present application, a plurality of grooves are arranged at the bottom of the skirt.

[0014] As a further optimization scheme of the present application, the lower surface of the skirt and the lower surface of the curtain are in the same plane.

[0015] As a further optimization scheme of the present application, a rib plate is arranged on the outer side wall of the sleeve.

[0016] As a further optimization scheme of the present application, a plurality of water permeable holes are arranged on the skirt.

[0017] As a further optimization scheme of the present application, the lower surface of the skirt is a plane, the upper surface is an inclined surface, and the thickness gradually decreases from inside to outside.

[0018] Compared with the prior art, the combined skirt and curtain based marine pile foundation anti-sinking plate structure of the present application has the following remarkable advantages and beneficial effects:

[0019] The anti-sinking plate integrates the anti-erosion function by combining the curtain and skirt, can effectively reduce the erosion of sea current to seabed while protecting the pile foundation, which solves the limitations of traditional anti-sinking plates in seabed erosion problem, improves the stability and safety of the overall structure; the detachable design facilitates installation and maintenance, and when pile foundation needs to be repaired or replaced, it can be quickly disassembled, thereby reducing maintenance cost and having higher flexibility and convenience. The structure of multiple rib plates arranged at the waist of the sleeve and grooves arranged at the bottom of the anti-sinking plate is optimized, so that it shows better performance when bearing vertical and horizontal loads, and this optimization design helps to improve the carrying capacity of the anti-sinking plate and reduce structural deformation, thereby prolonging the service life; the anti-sinking plate design takes into account the application requirements in different marine environments, can adapt to complex seabed topography and variable sea current conditions, and this adaptability makes it have wider application potential in various marine engineering. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a three-dimensional structure schematic diagram of the combined skirt and curtain based marine pile foundation anti-sinking plate structure of the present application.

[0021] Figure 2 is a front view structure schematic diagram of the combined skirt and curtain based marine pile foundation anti-sinking plate structure of the present application.

[0022] Figure 3 is a top view structure schematic diagram of the combined skirt and curtain based marine pile foundation anti-sinking plate structure of the present application.

[0023] Figure 4 is a structure schematic diagram of the sleeve of the present application.

[0024] Figure 5 is a structure schematic diagram of the skirt and sleeve ring of the present application.

[0025] Figure 6 is a partial structure schematic diagram of the anti-sinking plate of the present application.

[0026] Reference signs: 1, pile foundation; 2, sleeve; 201, rib plate; 202, ear plate; 3, anti-sinking plate; 301, skirt; 302, curtain; 303, arc-shaped connecting piece; 304, sleeve ring; 305, groove; 306, water permeable hole; 4, diagonal bracing assembly; 401, connecting rod; 402, hinged seat. DETAILED DESCRIPTION

[0027] In order for those skilled in the art to better understand the technical solutions of the present application, the preferred embodiments of the present application are described below in combination with specific examples, but it should be understood that the drawings are only used for illustrative description and cannot be understood as limiting the patent; in order to better illustrate the present embodiment, some components in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The positional relationship described in the drawings is only used for illustrative description and cannot be understood as limiting the patent.

[0028] The present detailed description aims to describe the combined skirt and curtain based offshore pile foundation anti-sinking plate structure and its application in the choke valve of the present application in detail, and further clarify its structural composition, working principle and technical features in the preferred embodiments.

[0029] As shown in Figure 1 , the present application provides a combined skirt and curtain based offshore pile foundation anti-sinking plate structure, which mainly includes a sleeve 2, a skirt 301, a collar 304, a curtain 302 and a diagonal brace assembly 4. Among them, the sleeve 2 is used to wrap the pile foundation 1, the skirt 301, the collar 304 and the curtain 302 together constitute the anti-sinking plate system, and the diagonal brace assembly 4 is used to enhance the overall stability of the structure. Because of the combination of modular skirt 301 and curtain 302, the layout of skirt 301 and the size of curtain 302 can be adjusted according to different geological conditions and hydrological environment, so that the whole structure is more flexible and can adapt to more diverse marine environment. The modular design makes each part can be independently manufactured, transported and installed, reducing the difficulty of on-site installation. At the same time, if a part is damaged or needs to be checked, it can be replaced or repaired individually without replacing the whole anti-sinking plate system, saving time and cost.

[0030] In some examples, as shown in Figure 3 , the design of the skirt 301 and the collar 304 is that the skirt 301 is uniformly distributed around the bottom of the sleeve 2 at a predetermined interval, and each skirt 301 is pulled tight by the curtain 302 to form an overall protective barrier. The curtain 302 is connected to the skirt 301 and the collar 304 through the lifting lug (or other appropriate connecting device) to facilitate the installation and removal of the curtain 302. As shown in Figure 5 and Figure 6 , the inner end of each skirt 301 is fixed with an arc-shaped connecting piece 303, and all the arc-shaped connecting pieces 303 are connected end to end to form a closed loop collar 304, which is installed at the bottom of the sleeve 2 through the lug plate 202 and the latch. The adjacent arc-shaped connecting pieces 303 are connected by mortise and tenon structure to ensure the firmness and convenience of the connection.

[0031] Among them, as shown in Figure 5 , the diagonal brace assembly 4 is composed of a plurality of diagonal braces 401, which are connected to the skirt 301 and the collar 304 through the lifting lug (or other appropriate connecting device) to form a stable and rigid structure.As shown, the lower surface of the apron 301 is designed as a plane, the upper surface is designed as an inclined plane, and the thickness gradually decreases from inside to outside. On the one hand, the inclined plane design helps to improve the water flow characteristics, making the water flow more smoothly around the anti-sinking plate 3, reducing the turbulent area of the water flow around the anti-sinking plate 3, thereby reducing the scouring effect on the pile foundation 1; the inclined plane design can reduce water resistance, helping to reduce the pressure of the water flow on the anti-sinking plate 3, thereby reducing the load on the structure and improving the stability of the structure. On the other hand, the inclined plane design can also reduce the accumulation of sediments on the anti-sinking plate 3, preventing sediments from clogging the water permeable holes 306 or affecting the function of the anti-sinking plate 3. In addition, the design of gradually decreasing thickness from inside to outside can make the load distribution more reasonable. Generally, the position close to the pile foundation 1 bears more load, so maintaining a larger thickness in this part can provide better support, while in the part away from the pile foundation 1, the load is smaller, so the thickness can be appropriately reduced, which ensures the strength of the key part and saves materials.

[0032] As shown in FIG. 1, the apron 301 is designed as a fan shape, and the lower surface of the apron 301 is designed as a plane. Figure 5 As shown, the bottom of the apron 301 is in contact with the seabed surface. In order to limit the lateral displacement between the bottom of the apron 301 and the soil, the bottom of the apron 301 is designed with multiple grooves 305, which can help the anti-sinking plate 3 to better embed into the seabed, so that the surface soil of the seabed and the bottom plate form a greater frictional resistance, further enhancing the horizontal anti-sliding capacity of the anti-sinking plate 3.

[0033] As shown in FIG. 1, the apron 301 is designed as a fan shape, and the lower surface of the apron 301 is designed as a plane. Figure 3 As shown, the anti-sinking plate 3 will be subjected to hydrostatic pressure in water. In order to prevent hydrostatic pressure from collapsing, multiple water permeable holes 306 are provided on the apron 301, so that the water pressure above and below the apron 301 is the same, to balance the internal and external water pressure, and prevent excessive water pressure from damaging the structure.

[0034] As shown in FIG. 1, the apron 301 is designed as a fan shape, and the lower surface of the apron 301 is designed as a plane. Figure 2 and Figure 3 As shown in FIG. 1, the apron 301 is designed as a fan shape, and the lower surface of the apron 301 is designed as a plane.

[0035] As shown in FIG. 1, the apron 301 is designed as a fan shape, and the lower surface of the apron 301 is designed as a plane. Figures 1-3As shown, the design of the diagonal brace assembly 4 is that the diagonal brace assembly 4 is composed of a connecting rod 401 and a hinge seat 402, and the two ends of the connecting rod 401 are connected with the top of the sleeve 2 and the top of the apron 301 through the hinge seat 402. The force generated by the seabed on the anti-sinking plate 3 is mainly borne by the apron 301, and the apron 301 is supported by the diagonal brace and the sleeve 2; the force borne by the apron 301 is transmitted to the offshore pile foundation 1 through the diagonal brace and the sleeve 2. In order to enhance the adjustment ability, the connecting rod 401 preferably uses a hydraulic rod, which ensures that the force in multiple directions is uniform, so as to adjust the length according to the actual situation and adapt to different geological conditions.

[0036] In some examples, as shown in the drawings, Figure 4 As shown, the design of the sleeve 2 is that a rib plate 201 is arranged on the outer wall of the sleeve 2 to enhance the structural strength and bearing capacity, and also helps to disperse the load and reduce the settlement of the pile foundation 1. The connection between the entire sleeve 2, the apron 301 and the curtain 302 is designed in a detachable form, which is convenient for later maintenance and replacement work.

[0037] In some examples, the construction and installation process is that the sleeve 2 is first sleeved on the outside of the pile foundation 1, then the apron 301 and the curtain 302 are installed in sequence, and are fixed through the diagonal brace assembly 4. Finally, it is checked whether the connection of all parts is stable. Matters needing attention: During the installation process, attention should be paid to ensure the close cooperation between the parts to avoid safety hazards caused by looseness.

[0038] The combined offshore pile foundation anti-sinking plate structure based on the apron and the curtain provided by the application not only can effectively prevent the settlement of the pile foundation, but also can resist the erosion of the sea current to the seabed, greatly improving the stability and safety of the offshore engineering structure. The flexible detachable design also provides convenience for subsequent maintenance.

[0039] According to the description and drawings of the application, a person skilled in the art can easily manufacture or use the combined offshore pile foundation anti-sinking plate structure based on the apron and the curtain, and can produce the positive effects described in the application.

[0040] Unless otherwise defined, all terms used in disclosing aspects of the application, such as professional terms and technical terms, have the meanings as commonly understood by one of ordinary skill in the art to which this application belongs. By way of non-limiting example, the following definitions are provided.

[0041] Unless otherwise defined, all terms used in disclosing aspects of the application, such as professional terms and technical terms, have the meanings as commonly understood by one of ordinary skill in the art to which this application belongs. By way of non-limiting example, the following definitions are provided.

[0042] The above description is only the preferred embodiment of the application, not any form of limitation on the application, any simple modification or equivalent change of the above embodiment according to the technical essence of the application falls within the protection scope of the application.

Claims

1. A combined skirt and curtain based marine pile foundation fender structure, comprising a sleeve (2) fitted outside the pile foundation (1) and a fender (3) arranged at the bottom of the sleeve (2), characterized in that: The anti-settlement plate (3) comprises a plurality of aprons (301) evenly spaced around the bottom of the sleeve (2), a curtain (302) is arranged at the interval between every two adjacent aprons (301), and an inclined strut assembly (4) is arranged between the top of each apron (301) and the top of the sleeve (2); An arc-shaped connecting piece (303) is fixed to the inner end of each apron (301), all the arc-shaped connecting pieces (303) are sequentially connected to form a closed loop of a sleeve ring (304), the sleeve ring (304) is sleeved on the bottom of the sleeve (2) and detachably connected thereto, a plurality of grooves (305) are arranged on the bottom of the apron (301), the lower surface of the apron (301) is on the same plane as the lower surface of the curtain (302), a plurality of water-permeable holes (306) are arranged on the apron (301), the lower surface of the apron (301) is a plane, the upper surface of the apron (301) is an inclined surface, and the thickness of the apron (301) gradually decreases from inside to outside.

2. A combination skirt and curtain based marine pile foundation fender structure according to claim 1, characterized in that: Every two adjacent arc-shaped connecting pieces (303) are connected in a mortise and tenon structure.

3. The combination skirt and curtain based marine pile foundation fender structure according to claim 1, characterized in that: The inclined strut assembly (4) comprises a connecting rod (401) and a hinged seat (402), and the two ends of the connecting rod (401) are respectively hinged to the top of the sleeve (2) and the top of the apron (301) through the hinged seats (402).

4. A combination skirt and curtain based marine pile foundation fender structure according to claim 3, characterized in that: The connecting rod (401) comprises a hydraulic rod.

5. The combination skirt and curtain based marine pile foundation fender structure of claim 1, wherein: A rib plate (201) is arranged on the outer side wall of the sleeve (2).

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