Modular prefabricated pile foundation wharf and construction process therefor

Abstract

The present invention relates to the technical field of wharf construction, and particularly to a modular prefabricated pile foundation wharf and a construction process therefor. The modular assembled pile foundation wharf comprises a fender, pipe piles, a prefabricated lower cross beam, a quick-release hook, a first prefabricated π-shaped beam plate, a second prefabricated π-shaped beam plate, a pipe frame foundation, cast-in-place upper cross beams and pile caps, wherein the cast-in-place upper cross beams are fixedly connected to two sides of the prefabricated lower cross beam, and the first prefabricated π-shaped beam plate and the second prefabricated π-shaped beam plate are fixedly arranged on the prefabricated lower cross beam. By dividing the wharf structure into a plurality of standardized modules, the present invention allows for prefabrication in a factory and on-site rapid assembly, and greatly improves the construction efficiency, and the modular design enables different modules to be interchanged and replaced, thereby reducing the difficulty in maintenance and upgrade. Compared with a conventional construction method, the construction period of the modular prefabricated pile foundation wharf is greatly shortened, and the on-site workload is reduced.

Description

A modular prefabricated pile foundation wharf and its construction technology Technical Field

[0001] This invention relates to the field of wharf construction technology, specifically a modular prefabricated pile foundation wharf and its construction process. Background Technology

[0002] High-pile beam-slab wharves are a type of wharf structure primarily suitable for soft soil foundations. Common pile foundation types include concrete square piles, concrete pipe piles, and steel pipe piles. The superstructure is a concrete beam-slab structure. High-pile wharves typically employ beam-slab, flat-slab, pier, multi-layer frame, and flexible berthing pile structures. Their structural working mechanism utilizes piles driven or embedded to a certain depth in the foundation to transfer the load acting on the wharf to the foundation. High-pile wharves offer advantages such as low settlement, good permeability, low wave reflection, and minimal impact on water flow and existing topography. They are suitable for soft soil, sandy soil, and other foundations where piles can be driven, as the piles can achieve a good bearing layer. In special cases, they can also be used in rock foundation conditions. A high-pile beam-slab wharf consists of pile foundations, pile caps, longitudinal beam systems, transverse beam systems, berthing components, and a deck. Depending on the superstructure, high-pile beam-slab wharves can be further subdivided into pile cap node structures and upper and lower transverse beam structures, transverse system systems, and longitudinal systems. These structural types, such as the prefabricated pile foundation wharf, have their own characteristics and applicability. Currently, the design and construction of prefabricated pile foundation wharves for water transport engineering still have the following problems: low degree of on-site prefabrication, large workload of on-site work such as rebar binding, formwork erection and dismantling, and concrete pouring, resulting in a large number of offshore workers and high difficulty in safety risk management; low standardization of existing pile foundation wharf structural components, traditional structural components such as pile caps and longitudinal and transverse beams are small in size, still limited to the lifting capacity of 100t class crane ships, a section is often composed of more than 100 components, the number of prefabricated components and the number of lifting and installation times are large, the natural environment has a great impact on construction, the utilization rate of construction ships and equipment is not high, and in the process of existing wharves, the pile caps and pipe piles at the bottom cannot form a whole, which greatly reduces the resistance to external resistance, resulting in poor stability and safety during use. Therefore, a modular prefabricated pile foundation wharf and construction technology are needed to improve the above problems. Summary of the Invention

[0003] To address the problems in the existing technology, this invention provides a modular prefabricated pile foundation wharf and its construction process.

[0004] The technical solution adopted by this invention to solve its technical problem is: a modular prefabricated pile foundation wharf and its construction process, including fenders, pipe piles, precast lower crossbeams, quick-release hooks, a first precast π-shaped beam slab, a second precast π-shaped beam slab, a pipe frame foundation, a cast-in-place upper crossbeam, and pile caps. The cast-in-place upper crossbeam is fixedly connected to both sides of the precast lower crossbeam. The first and second precast π-shaped beam slabs are fixedly installed on the precast lower crossbeam. The pipe frame foundation is uniformly fixedly installed on the second precast π-shaped beam slab. The pipe frame is fixedly connected to the pipe frame foundation. The fender is fixedly connected to one end of the first precast π-shaped beam slab away from the second precast π-shaped beam slab. The pile caps are uniformly fixedly connected to the bottom ends of both sides of the precast lower crossbeam. The pipe piles are fixedly connected to the bottom end of the pile caps. The quick-release hooks are fixedly connected to the side end of the first precast π-shaped beam slab.

[0005] Preferably, the second precast π-shaped beam slab is fixedly mounted on the pipe rack at one end opposite to the first precast π-shaped beam slab and on the pipe rack foundation.

[0006] Preferably, a cast-in-place wharf drainage ditch is provided at the outer end of the cast-in-place upper crossbeam.

[0007] Preferably, the bottom end of the prefabricated lower crossbeam is provided with a reinforcing body.

[0008] Preferably, the reinforcing body includes a reinforcing connecting plate, a fixed connecting flange, a fixed connecting column, and a fixed connecting protective ring. The fixed connecting protective rings are evenly and symmetrically distributed. The reinforcing connecting plate is fixedly connected to the bottom ends of the fixed connecting protective rings by bolts. The fixed connecting column is fixedly connected to the fixed connecting protective ring. The fixed connecting flange is fixedly connected to the end of the fixed connecting column away from the fixed connecting protective ring. Adjacent fixed connecting flanges are fixedly connected by bolts.

[0009] Preferably, a mounting box is symmetrically fixed to the upper end of the reinforcing connecting plate by bolts, and an electro-hydraulic rod is uniformly fixed inside the mounting box. An auxiliary support plate is fixedly connected to the upper end of the electro-hydraulic rod.

[0010] Preferably, a first reinforcing plate and a second reinforcing plate are provided below the reinforcing connecting plate, with the first reinforcing plate located below the second reinforcing plate. The first and second reinforcing plates are fixedly connected to each other by threaded rods. The pipe pile is fitted and secured between the securing connecting plate and the first and second reinforcing plates. Fixed connecting support plates are uniformly fixed between the first and second reinforcing plates. The bottom end of the reinforcing connecting plate is fixedly connected to the second reinforcing plate via a connecting fixing plate and a support column. The connecting fixing plates are distributed at both ends of the support column, and the two connecting fixing plates are fixedly connected to the reinforcing connecting plate and the second reinforcing plate respectively by bolts.

[0011] Preferably, the fixed connection protective ring is fastened to the outside of the pile cap by bolts, and the upper end of the auxiliary support plate is in contact with the bottom end of the precast lower crossbeam.

[0012] A modular prefabricated pile foundation wharf construction method includes the following steps:

[0013] S1. First, pipe piles are fabricated and the upper module bottomless box girder slab is prefabricated. At the same time, pile driving is carried out, pile deviation is measured, and the lower module slot-type crossbeam is prefabricated.

[0014] S2. Fabrication of the core steel structure, construction of the core, installation of precast beams, and pouring of the beam cavity joints;

[0015] S3. Install the bottomless box girder slab, construct the nodes on the crossbeams, and finally apply the surface layer.

[0016] A modular prefabricated pile foundation wharf construction process includes the following steps:

[0017] S1. Pile foundation construction: The static pressure of the pile driver is used to press the precast piles into the soil. When the length of the precast pile is insufficient, it is necessary to splice the piles. The splicing is carried out by welding, flange bolt connection and sulfur grout anchoring. During the construction process, the verticality of the pile body, settlement, pile top elevation and changes in the surrounding environment are continuously monitored. The quality of raw materials such as pile materials and concrete is inspected to ensure that the construction quality meets the design requirements.

[0018] S2. Modular superstructure installation: The steel structure of the modular superstructure is fabricated and processed in the prefabrication plant, including crossbeams, longitudinal beams, and pile cap components. The manufactured modular superstructure components are classified, packaged, and transported to the construction site by transportation equipment.

[0019] S3. Modular superstructure installation: Use hoisting equipment to unload the modular superstructure components from the transport vehicle and install them according to the construction drawings and numbers. During the installation process, ensure the connection and fixation between the components to ensure the stability and safety of the entire wharf. Use sleeve connection, rebar connection and other methods to connect the longitudinal beams, transverse beams and pile foundations. Pressure grouting and other operations should be carried out during the connection process to ensure the reliability of the connection.

[0020] S4. Installation and commissioning of ancillary facilities, including the installation and laying of dock berthing facilities, mooring facilities, process auxiliary facilities and safety auxiliary facilities.

[0021] The beneficial effects of this invention are:

[0022] I. This invention divides the wharf structure into multiple standardized modules, enabling factory prefabrication and rapid on-site assembly, greatly improving construction efficiency. The modular design allows for interchangeability and replacement between different modules, reducing the difficulty of maintenance and upgrades. Compared with traditional construction methods, the construction cycle of the modular prefabricated pile foundation wharf is significantly shortened, reducing on-site work and mitigating the impact of weather on construction progress. The modular prefabricated pile foundation wharf reduces a large amount of construction waste and wastewater discharge during construction, which is beneficial to environmental protection. The construction process of the modular prefabricated pile foundation wharf is relatively simple and straightforward, reducing the risks of high-altitude operations and complex construction processes. The factory prefabrication and on-site assembly methods reduce the labor intensity and safety risks for construction workers.

[0023] II. This invention incorporates a reinforcing body at the bottom of the precast lower beam and between each pipe pile and pile cap, providing auxiliary reinforcement and stability. This significantly increases the strength of the wharf after construction. The fixed connection protective rings within the reinforcing body are securely fastened to each pile cap using bolts, protecting the pile caps. Furthermore, the fixed connection flanges and columns connect the protective rings, forming a unified structure. A second reinforcing plate is fixed to the outer side of the first and second reinforcing plates via threaded rods, securing the pipe piles between them and the connecting plate. The first and second reinforcing plates are then fixed to the reinforcing connecting plate via a fixed connection support plate, a connecting fixing plate, and a support column, further increasing overall strength and stability. An electro-hydraulic rod lifts the auxiliary support plate to firmly support and reinforce the bottom of the precast lower beam, making the wharf not only easy to assemble but also more robust and stable after construction. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 is a three-dimensional structural diagram of the main body from a frontal perspective in this invention;

[0026] Figure 2 is a side view of the three-dimensional structure of the main body in this invention;

[0027] Figure 3 is a schematic diagram of the bottom structure of the main body in this invention;

[0028] Figure 4 is a schematic diagram of the bottom structure of the prefabricated lower crossbeam in this invention;

[0029] Figure 5 is a schematic diagram of the reinforced main structure in this invention;

[0030] Figure 6 is a schematic diagram of the internal structure of the reinforced main body in this invention;

[0031] Figure 7 is a schematic diagram of the wharf side view structure in this invention;

[0032] Figure 8 is a flowchart of the construction process of the present invention.

[0033] In the diagram: 1-Fender, 2-Pipe pile, 3-Precast lower crossbeam, 4-Quick release hook, 5-First precast π-shaped beam, 6-Second precast π-shaped beam, 7-Pipe rack, 8-Pipe rack foundation, 9-Cast-in-place upper crossbeam, 10-Cast-in-place wharf drainage ditch, 11-Reinforced main body, 12-Pile cap, 13-Auxiliary support plate, 14-Electro-hydraulic rod, 15-Fixed mounting box, 16-Reinforced connecting plate, 17-Fixed connecting flange, 18-Fixed connecting column, 19-Fixed connecting protective ring, 22-First reinforcement clamping plate, 23-Second reinforcement clamping plate, 24-Clamping connecting plate, 25-Fixed threaded rod, 26-Fixed connecting support plate, 27-Connecting fixing plate, 28-Support column. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0035] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0036] The invention will be further described below with reference to the accompanying drawings.

[0037] Example 1, as shown in Figures 1, 2, 3, 4, and 7, describes a modular prefabricated pile foundation wharf and its construction process according to the present invention. The wharf includes a fender 1, pipe piles 2, a precast lower crossbeam 3, a quick-release hook 4, a first precast π-shaped beam slab 5, a second precast π-shaped beam slab 6, a pipe frame foundation 8, a cast-in-place upper crossbeam 9, and pile caps 12. The cast-in-place upper crossbeam 9 is fixedly connected to both sides of the precast lower crossbeam 3. The first precast π-shaped beam slab 5 and the second precast π-shaped beam slab 6 are fixedly installed on the precast lower crossbeam 3. The pipe frame foundation 8 is evenly fixedly installed on the second precast π-shaped beam slab 6. The pipe frame 7 is fixed... The pipe frame 1 is fixedly connected to the pipe frame foundation 8. The fender 1 is fixedly connected to the end of the first precast π-shaped beam 5 away from the second precast π-shaped beam 6. The pile cap 12 is evenly fixedly connected to the bottom ends of both sides of the precast lower crossbeam 3. The pipe pile 2 is fixedly connected to the bottom end of the pile cap 12. The quick-release hook 4 is fixedly connected to the side end of the first precast π-shaped beam 5. The second precast π-shaped beam 6 is fixedly installed on the pipe frame foundation 8 at the end away from the first precast π-shaped beam 5. The cast-in-place upper crossbeam 9 is provided with a cast-in-place wharf drainage ditch 10. The bottom end of the precast lower crossbeam 3 is provided with a reinforcing body 11.

[0038] As shown in Figures 5 and 6, the reinforcement body 11 includes a reinforcement connecting plate 16, a fixed connecting flange 17, a fixed connecting column 18, and a fixed connecting protective ring 19. The fixed connecting protective rings 19 are evenly and symmetrically distributed. The reinforcement connecting plate 16 is fixedly connected to the bottom ends of the fixed connecting protective rings 19 by bolts. The fixed connecting column 18 is fixedly connected to the fixed connecting protective ring 19. The fixed connecting flange 17 is fixedly connected to the end of the fixed connecting column 18 away from the fixed connecting protective ring 19. Adjacent fixed connecting flanges 17 are fixedly connected by bolts. A fixed mounting box 15 is symmetrically fixedly installed on the upper end of the reinforcement connecting plate 16 by bolts. An electric hydraulic rod 14 is evenly fixedly installed inside the fixed mounting box 15. An auxiliary support plate 13 is fixedly connected to the upper end of the electric hydraulic rod 14. Below the connecting plate 16, there is a first reinforcing plate 22 and a second reinforcing plate 23, with the first reinforcing plate 22 located below the second reinforcing plate 23. The two sides of the first reinforcing plate 22 and the second reinforcing plate 23 are fixedly connected to the clamping connecting plate 24 by the fixing threaded rod 25. The pipe pile 2 is adapted to be clamped between the clamping connecting plate 24 and the first reinforcing plate 22 and the second reinforcing plate 23. The fixed connecting support plate 26 is evenly fixedly installed between the first reinforcing plate 22 and the second reinforcing plate 23. The bottom end of the reinforcing connecting plate 16 is fixedly connected to the second reinforcing plate 23 by the connecting fixing plate 27 and the support column 28. The connecting fixing plate 27 is distributed at both ends of the support column 28. The two connecting fixing plates 27 are fixedly connected to the reinforcing connecting plate 16 and the second reinforcing plate 23 by bolts respectively.

[0039] The fixed connection protective ring 19 is fastened to the outside of the pile cap 12 by bolts, and the upper end of the auxiliary support plate 13 is in contact with the bottom end of the precast lower crossbeam 3.

[0040] [Corrected from Detailed Rule 91, 05.08.2025] As shown in Figure 8, a modular prefabricated pile foundation wharf construction method includes the following steps:

[0041] S1. First, pipe piles are fabricated and the upper module bottomless box girder slab is prefabricated. At the same time, pile driving is carried out, pile deviation is measured, and the lower module slot-type crossbeam is prefabricated.

[0042] S2. Fabrication of the core steel structure, construction of the core, installation of precast beams, and pouring of the beam cavity joints;

[0043] S3. Install the bottomless box girder slab, construct the nodes on the crossbeams, and finally apply the surface layer.

[0044] Working Principle: The foundation uses Φ1200mm large pipe piles. The crossbeams and π-shaped panels are prefabricated. A 150-210mm thick cast-in-place paving layer is installed on the prefabricated π-shaped panels on the wharf surface. The crossbeams are prefabricated as a single piece, with dimensions of 25m × 2.6m × 1.4m (length × width × height). Each beam weighs approximately 200t. A cavity is reserved at the bottom of the crossbeam for pile installation and connection. The pile extends 100mm into the prefabricated pile cap. A connector is used to assemble the pile core concrete structure, which is then sealed with grout. The cavity is designed to accommodate the anchorage length of the connectors and pile driving deviation, with openings Φ1600mm in diameter and 1000mm in height. Corrugated steel plates are embedded in the inner wall of the cavity, and anti-impact steel plates are embedded in the top to strengthen the cavity structure and increase the reliability of the connection between the components and the grout. The upper beams and slabs are prefabricated. The integral bottomless box-type π-beam slab is available in two sizes based on plan dimensions: 14.6m×8.8m and 9.9m×8.8m. The slab has three longitudinal ribs and two transverse ribs at the bottom, with the transverse ribs also serving as formwork for the joints. The longitudinal ribs are 600mm thick, the transverse ribs are 300mm thick, and the top slab is 300mm thick. The upper cast-in-place pavement layer is 150-210mm thick. The top slab and ribs are reinforced with a chamfer of 200×200mm. The steel berthing component is an integral, enclosed steel structure consisting of a panel, back plate, and longitudinal and transverse stiffeners. Embedded nuts and sleeves are installed through the panel and back plate. The anchor bolts for the berthing component and the fender rubber drum installation are located on the panel, which also has fender rubber drum installation anchor bolts and pull rings.

[0045] By setting up a reinforcing body 11 at the bottom of the precast lower beam 3 and between each pipe pile 2 and pile cap 12, it plays a role in auxiliary reinforcement and stability, greatly increasing the strength of the wharf after construction. Each fixed connection protective ring 19 in the reinforcing body 11 can be securely fastened to each pile cap 12 by bolts, not only protecting the pile cap 12, but also connecting the fixed connection protective rings 19 into a whole through the fixed connection flange 17 and fixed connection column 18, making each pile cap 12 a single unit. Furthermore, the outer sides of the first reinforcing plate 22 and the second reinforcing plate 23 are secured by... The threaded rod 25 is fixedly installed with a second reinforcing plate 23, so that the pipe pile 2 can be fixed between the first reinforcing plate 22, the second reinforcing plate 23 and the fixing connecting plate 24. The first reinforcing plate 22 and the second reinforcing plate 23 are fixedly connected to the reinforcing connecting plate 16 through the fixed connecting support plate 26, the connecting fixing plate 27 and the supporting column 28, which increases the overall strength and makes it more stable. In addition, the electric hydraulic rod 14 can lift the auxiliary support plate 13 to firmly support and reinforce the bottom end of the precast lower crossbeam 3, making the wharf not only easy to assemble, but also more solid and stable after construction.

[0046] Example 2: A modular prefabricated pile foundation wharf construction process, which includes the following steps:

[0047] S1. Pile foundation construction: The static pressure of the pile driver is used to press the precast piles into the soil. When the length of the precast pile is insufficient, it is necessary to splice the piles. The splicing is carried out by welding, flange bolt connection and sulfur grout anchoring. During the construction process, the verticality of the pile body, settlement, pile top elevation and changes in the surrounding environment are continuously monitored. The quality of raw materials such as pile materials and concrete is inspected to ensure that the construction quality meets the design requirements.

[0048] S2. Modular superstructure installation: The steel structure of the modular superstructure is fabricated and processed in the prefabrication plant, including crossbeams, longitudinal beams, and pile cap components. The manufactured modular superstructure components are classified, packaged, and transported to the construction site by transportation equipment.

[0049] S3. Modular superstructure installation: Use hoisting equipment to unload the modular superstructure components from the transport vehicle and install them according to the construction drawings and numbers. During the installation process, ensure the connection and fixation between the components to ensure the stability and safety of the entire wharf. Use sleeve connection, rebar connection and other methods to connect the longitudinal beams, transverse beams and pile foundations. Pressure grouting and other operations should be carried out during the connection process to ensure the reliability of the connection.

[0050] S4. Installation and commissioning of ancillary facilities, including the installation and laying of dock berthing facilities, mooring facilities, process auxiliary facilities and safety auxiliary facilities.

[0051] In implementing this embodiment, by dividing the wharf structure into multiple standardized modules, factory prefabrication and rapid on-site assembly can be achieved, greatly improving construction efficiency. The modular design allows for interchangeability and replacement between different modules, reducing the difficulty of maintenance and upgrades. Compared with traditional construction methods, the construction cycle of the modular prefabricated pile foundation wharf is greatly shortened, reducing on-site work and the impact of weather on construction progress. The modular prefabricated pile foundation wharf reduces a large amount of construction waste and wastewater discharge during construction, which is beneficial to environmental protection. The construction process of the modular prefabricated pile foundation wharf is relatively simple and clear, reducing the risks of high-altitude operations and complex construction links. The factory prefabrication and on-site assembly method reduces the labor intensity and safety risks of construction workers.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular prefabricated pile foundation wharf, comprising fenders (1), pipe piles (2), precast lower crossbeams (3), quick-release hooks (4), first precast π-shaped beams (5), second precast π-shaped beams (6), pipe racks (7), pipe rack foundations (8), cast-in-place upper crossbeams (9), and pile caps (12), characterized in that: The cast-in-place upper crossbeam (9) is fixedly connected to both sides of the precast lower crossbeam (3). The first precast π-shaped beam slab (5) and the second precast π-shaped beam slab (6) are fixedly installed on the precast lower crossbeam (3). The pipe rack foundation (8) is evenly fixedly installed on the second precast π-shaped beam slab (6). The pipe rack (7) is fixedly connected to the pipe rack foundation (8). The fender (1) is fixedly connected to the end of the first precast π-shaped beam slab (5) away from the second precast π-shaped beam slab (6). The pile cap (12) is evenly fixedly connected to the bottom ends of both sides of the precast lower crossbeam (3). The pipe pile (2) is fixedly connected to the bottom end of the pile cap (12). The quick-release hook (4) is fixedly connected to the side end of the first precast π-shaped beam slab (5).

2. The modular prefabricated pile foundation wharf according to claim 1, characterized in that: The second precast π-shaped beam slab (6) is located away from the first precast π-shaped beam slab (5) and is fixedly mounted on the pipe rack foundation (8) with a pipe rack (7).

3. A modular prefabricated pile foundation wharf according to claim 2, characterized in that: The outer end of the cast-in-place upper beam (9) is provided with a cast-in-place wharf drainage ditch (10).

4. A modular prefabricated pile foundation wharf according to claim 3, characterized in that: The bottom end of the prefabricated lower crossbeam (3) is provided with a reinforcing body (11).

5. A modular prefabricated pile foundation wharf according to claim 4, characterized in that: The reinforcing body (11) includes a reinforcing connecting plate (16), a fixed connecting flange (17), a fixed connecting column (18), and a fixed connecting protective ring (19). The fixed connecting protective rings (19) are evenly and symmetrically distributed. The reinforcing connecting plate (16) is fixedly connected to the bottom ends of the fixed connecting protective rings (19) by bolts. The fixed connecting column (18) is fixedly connected to the fixed connecting protective ring (19). The fixed connecting flange (17) is fixedly connected to the end of the fixed connecting column (18) away from the fixed connecting protective ring (19). Adjacent fixed connecting flanges (17) are fixedly connected by bolts.

6. A modular prefabricated pile foundation wharf according to claim 5, characterized in that: The upper end of the reinforcing connecting plate (16) is symmetrically fixed with a mounting box (15) by bolts. The inside of the mounting box (15) is uniformly fixed with an electric hydraulic rod (14). The upper end of the electric hydraulic rod (14) is fixedly connected with an auxiliary support plate (13).

7. A modular prefabricated pile foundation wharf according to claim 6, characterized in that: Below the reinforcing connecting plate (16) are a first reinforcing clamping plate (22) and a second reinforcing clamping plate (23), with the first reinforcing clamping plate (22) located below the second reinforcing clamping plate (23). The first reinforcing clamping plate (22) and the second reinforcing clamping plate (23) are fixedly connected to clamping connecting plates (24) on both sides by fixed threaded rods (25). The pipe pile (2) is adapted to be clamped onto the clamping connecting plate (24) and the first reinforcing clamping plate (22) and the second reinforcing clamping plate (23). Between the first reinforcing plate (22) and the second reinforcing plate (23), a fixed connecting support plate (26) is evenly fixedly installed. The bottom end of the reinforcing connecting plate (16) is fixedly connected to the second reinforcing plate (23) through a connecting fixing plate (27) and a support column (28). The connecting fixing plates (27) are distributed at both ends of the support column (28). The two connecting fixing plates (27) are fixedly connected to the reinforcing connecting plate (16) and the second reinforcing plate (23) respectively by bolts.

8. A modular prefabricated pile foundation wharf according to claim 7, characterized in that: The fixed connection protective ring (19) is fastened to the outside of the pile cap (12) by bolts, and the upper end of the auxiliary support plate (13) is in contact with the bottom end of the prefabricated lower crossbeam (3).

9. A construction method for a modular prefabricated pile foundation wharf, applicable to the modular prefabricated pile foundation wharf described in claim 8, characterized in that, It includes the following steps: S1. First, pipe piles are fabricated and the upper module bottomless box girder slab is prefabricated. At the same time, pile driving is carried out, pile deviation is measured, and the lower module slot-type crossbeam is prefabricated. S2. Fabrication of the core steel structure, construction of the core, installation of precast beams, and pouring of the beam cavity joints; S3. Install the bottomless box girder slab, construct the nodes on the crossbeams, and finally apply the surface layer.

10. A modular prefabricated pile foundation wharf construction process, applicable to the modular prefabricated pile foundation wharf described in claim 8, characterized in that, It includes the following steps: S1. Pile foundation construction: The static pressure of the pile driver is used to press the precast piles into the soil. When the length of the precast pile is insufficient, the piles are spliced. During the construction process, the verticality of the pile body, settlement, pile top elevation and changes in the surrounding environment are continuously monitored. The quality of the pile materials and concrete raw materials is inspected to ensure that the construction quality meets the design requirements. S2. Modular superstructure installation: The steel structure of the modular superstructure is fabricated and processed in the prefabrication plant, including crossbeams, longitudinal beams, and pile cap components. The manufactured modular superstructure components are classified, packaged, and transported to the construction site by transportation equipment. S3. Modular superstructure installation: Use hoisting equipment to unload the modular superstructure components from the transport vehicle and install them according to the construction drawings and numbers. During the installation process, ensure the connection and fixation between the components to ensure the stability and safety of the entire wharf. Use sleeve connection, rebar connection and other methods to connect the longitudinal beams, transverse beams and pile foundations. Pressure grouting and other operations should be carried out during the connection process to ensure the reliability of the connection. S4. Installation and commissioning of ancillary facilities: Installation and laying of dock berthing facilities, mooring facilities, process auxiliary facilities and safety auxiliary facilities.

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