A pile foundation model test device under wave-earthquake coupling

Abstract

The invention relates to a pile foundation model test device under wave-earthquake coupling action. Six first universal joints are fixedly connected to the upper surface of a base, the other ends of the six first universal joints are fixedly connected to an electro-hydraulic vibrator, the tops of the six electro-hydraulic vibrators are fixedly connected to a second universal joint, the other ends of the six second universal joints are fixedly connected to the same vibration platform, and the upper surface of the vibration platform is fixedly connected to a model box. The invention uses a wave making mechanism and an electro-hydraulic vibrator in coordination, so that the device is more similar to a real marine environment. At the same time, through the arrangement of a second displacement sensing platform and a stress sheet, the device can accurately measure the unidirectional force applied by a uniformly distributed load to the pile foundation through the stress sheet while testing the displacement of the pile top of the pile foundation column, and realizes real-time measurement of the displacement of the pile bottom of the pile foundation column through a metal thin rod and the first displacement sensing platform.

Description

Technical Field

[0001] The invention belongs to the technical field of pile foundation bearing capacity testing, and relates to a pile foundation model testing device under wave-earthquake coupling. Background Art

[0002] As human demand for the development of marine resources continues to grow, a variety of offshore projects such as offshore drilling platforms and cross-sea bridges have emerged. The working environment of structures in marine projects is harsh and they are often affected by wave loads, the most basic load. In addition, since my country is located in the most active seismic zone in the world, when an earthquake occurs, the structures of buildings in the sea area are usually affected by waves and earthquakes at the same time. As the main foundation form of offshore structures, pile foundations have important theoretical and engineering application value in studying their dynamic response under complex environmental loads such as earthquakes and waves.

[0003] At present, the research on pile-soil dynamic interaction under wave-seismic coupling is usually not easy to achieve by field test methods, and due to the lack of sufficient field data due to various conditions, indoor model test research methods are often used. The similarity principle is used to artificially control various conditions such as model proportion, load size and nature, environmental parameters, etc. to obtain convincing data.

[0004] Current pile foundation model test methods mostly idealize environmental factors such as wind and earthquake into abstract horizontal loads, that is, they focus on studying the pile-soil interaction when various loads such as vertical, horizontal and cyclic loads are applied to the pile foundation under general conditions, without considering the mutual influence of the two systems of waves and earthquakes in the real environment and their combined effect on the pile foundation. Therefore, a pile foundation model test device under wave-earthquake coupling is proposed. Summary of the invention

[0005] In view of this, the present invention provides a pile foundation model test device under wave-earthquake coupling in order to solve the problem that the pile-soil interaction is mainly studied when multiple loads such as vertical, horizontal and cyclic loads are applied to the pile foundation under general conditions, without considering the mutual influence of the two systems of waves and earthquakes in the real environment and their combined effects on the pile foundation.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A pile foundation model test device under wave-earthquake coupling comprises a base, the upper surface of the base is fixedly connected with six first universal joints, the other ends of the six first universal joints are fixedly connected with electro-hydraulic vibrators, the tops of the six electro-hydraulic vibrators are fixedly connected with second universal joints, the other ends of the six second universal joints are fixedly connected with the same vibration platform, the upper surface of the vibration platform is fixedly connected with a model box, the top of the model box is fixedly connected with a mounting plate, the upper surface of the mounting plate is fixedly connected with a frequency modulator, the upper surface of the mounting plate is provided with a wave making mechanism, the wave making mechanism comprises a fixed seat, a first support arm and a glass plate, the fixed seat is fixed to the upper surface of the mounting plate by bolts, the outer wall of one side of the fixed seat is fixedly connected with a motor, the fixed seat is provided with a first support arm, the first support arm and the fixed seat are connected to the first support arm. A first socket is provided on one side of the seat, a mounting shaft is movably connected in the first socket, and the mounting shaft is fixed to the first support arm, one end of the motor output shaft is fixed to the mounting shaft, a second support arm is provided at the other end of the first support arm, a second socket is provided at one end of the second support arm and the other end of the first support arm, a third adjusting bolt is provided in the second socket, a mounting hole is provided on one side of the glass plate, a second adjusting bolt is provided in the mounting hole, and the second adjusting bolt is fixed to the other end of the second support arm, a pile foundation column is fixedly connected to the bottom inner wall of the model box, a second displacement sensing platform is fixedly connected to the top of the pile foundation column, three evenly distributed stress sheets are provided on the upper surface of the second displacement sensing platform, one side of the stress sheet is electrically connected to a signal line, and a vortex manufacturing mechanism is provided on the inner wall of one side of the model box.

[0008] Furthermore, a thin metal rod is fixedly connected to the bottom of the pile foundation column, a first displacement sensing platform is fixedly connected to the top of the thin metal rod, and upper surfaces of the first displacement sensing platform and the second displacement sensing platform are electrically connected to displacement sensing wires.

[0009] Furthermore, the vortex making mechanism includes a fixed column, which is fixed to an inner wall of one side of the model box by bolts, and a stirrer is fixedly connected to the top of the fixed column, and a control line is electrically connected to one side of the stirrer, and the control line passes through the model box.

[0010] Furthermore, a shock-absorbing plate is fixedly connected to the upper surface of the mounting plate, and the shock-absorbing plate is located between the mounting plate and the fixing seat.

[0011] Furthermore, a drainage hole is opened on one side of the model box, a drainage pipe is fixedly connected to one side of the drainage hole, and a control valve is provided on one side of the drainage pipe.

[0012] Furthermore, a sealing ring is provided on one side of the drainage hole, and the sealing ring is located between the drainage hole and the drainage pipe.

[0013] Furthermore, a penetrating triangular hole is opened on one side of the base.

[0014] Furthermore, a plurality of rubber rings are fixedly connected to the upper surface of the base, and the rubber rings are located between the base and the first universal joint.

[0015] Furthermore, the motor and the stirrer are both electrically connected to the frequency modulator.

[0016] The beneficial effects of the present invention are:

[0017] 1. The pile foundation model test device under wave-earthquake coupling disclosed in the present invention can simulate waves and earthquakes through the coordinated use of a wave making mechanism and an electro-hydraulic vibrator, thereby making the device more similar to the actual marine environment and improving the comprehensiveness of the device simulation.

[0018] 2. The present invention discloses a pile foundation model test device under wave-earthquake coupling action. By installing a second displacement sensing platform and a stress plate on the top of the pile foundation column, the device can accurately measure the unidirectional force exerted on the pile foundation by the uniformly distributed load through the stress plate while testing the displacement of the pile foundation column top, thereby improving the diversity of the device's functions.

[0019] 3. The pile foundation model test device under wave-earthquake coupling disclosed in the present invention realizes real-time measurement of the bottom displacement of the pile foundation column by using a metal thin rod and a first displacement sensing platform, thereby improving the measurement accuracy of the device.

[0020] 4. The pile foundation model test device under wave-earthquake coupling disclosed in the present invention has a triangular hole on the base, so that the device can be more stable when vibrating.

[0021] 5. The pile foundation model test device under the wave-earthquake coupling action disclosed in the present invention reduces the vibration impact of the electro-hydraulic vibrator on the ground by installing a rubber ring at the bottom of the electro-hydraulic vibrator, weakens the inertia caused by the vibration, and makes the operation of parts more efficient.

[0022] 6. The present invention discloses a pile foundation model test device under the wave-earthquake coupling action. Through the coordinated use of a wave making mechanism and an electro-hydraulic vibrator, the device can simulate waves and earthquakes, thereby making the device more similar to the actual marine environment and improving the comprehensiveness of the device simulation. At the same time, through the arrangement of a second displacement sensing platform and a stress plate, the device can accurately measure the unidirectional force exerted on the pile foundation by the uniformly distributed load through the stress plate while testing the displacement of the pile top, thereby improving the diversity of the device functions. The metal thin rod and the first displacement sensing platform can realize real-time measurement of the bottom displacement of the pile foundation column, thereby improving the measurement accuracy of the device. A rubber pad is installed at the bottom of the electro-hydraulic vibrator to reduce the vibration impact of the electric vibration motor on the ground, reduce the inertia caused by the vibration, and make the operation of the parts more efficient.

[0023] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0025] Figure 1 A three-dimensional diagram of a pile foundation model test device under wave-earthquake coupling of the present invention from a first viewing angle;

[0026] Figure 2 A three-dimensional diagram of a pile foundation model test device under wave-earthquake coupling of the present invention from a second viewing angle;

[0027] Figure 3 A three-dimensional cross-sectional view of a pile foundation model test device under wave-earthquake coupling of the present invention;

[0028] Figure 4 A top view of a pile foundation model test device under wave-earthquake coupling of the present invention;

[0029] Figure 5 A bottom view of a pile foundation model test device under wave-earthquake coupling of the present invention;

[0030] Figure 6 A three-dimensional diagram of a pile foundation model test device under wave-earthquake coupling of the present invention from a third viewing angle;

[0031] Figure 7 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0032] Figure 8 The three-dimensional diagram of the wave making mechanism in the pile foundation model test device under the wave-earthquake coupling action of the present invention.

[0033] Figure numerals: 1. base; 2. rubber ring; 3. first universal joint; 4. electro-hydraulic vibrator; 5. vibration platform; 6. model box; 7. metal thin rod; 8. displacement sensing line; 9. first displacement sensing platform; 10. pile foundation column; 11. wave making mechanism; 12. frequency modulator; 13. mounting plate; 14. control line; 15. sealing ring; 16. drain pipe; 17. fixed column; 18. agitator; 19. second universal joint; 20. triangular hole; 21. second displacement sensing platform; 22. stress sheet; 23. signal line; 24. fixed seat; 25. mounting shaft; 26. first support arm; 27. second support arm; 28. second adjusting bolt; 29. ​​glass plate; 30. mounting hole; 31. third adjusting bolt; 32. motor; 33. shock-absorbing plate. DETAILED DESCRIPTION

[0034] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0035] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0036] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0037] Embodiment 1

[0038] like Figure 1-Figure 8As shown, a pile foundation model test device under wave-earthquake coupling action is provided, wherein six first universal joints 3 are fixed to the upper surface of a base 1 by bolts, and the other ends of the six first universal joints 3 are fixed to electro-hydraulic vibrators 4 by bolts, and the tops of the six electro-hydraulic vibrators 4 are fixed to second universal joints 19 by bolts, and the other ends of the six second universal joints 19 are fixed to the same vibration platform 5 by bolts, and a model box 6 is fixed to the upper surface of the vibration platform 5 by bolts, and the electro-hydraulic vibrators 4 are started, and the liquid flow rate flowing through the electro-hydraulic vibrators 4 per unit area simulates the earthquake vibration frequency, and the volume of the flowing liquid simulates the earthquake amplitude, so that the model box 6 vibrates, and the six electro-hydraulic vibrators 4 have six degrees of freedom in vibration directions, thereby achieving the effect of simulating a real complex earthquake.

[0039] The top of the model box 6 is fixed with a mounting plate 13 by bolts, the upper surface of the mounting plate 13 is fixed with a frequency modulator 12 by bolts, the upper surface of the mounting plate 13 is provided with a wave making mechanism 11, the wave making mechanism 11 includes a fixing seat 24, a first support arm 26 and a glass plate 29, the fixing seat 24 is fixed to the upper surface of the mounting plate 13 by bolts, a motor 32 is fixed to the outer wall of one side of the fixing seat 24 by bolts, a first support arm 26 is provided in the fixing seat 24, a first socket is provided on one side of the first support arm 26 and the fixing seat 24, a mounting shaft 25 is inserted in the first socket, and the mounting shaft 25 is fixed to the first support arm 26, one end of the output shaft of the motor 32 is fixed to the mounting shaft 25, and the other end of the first support arm 26 is provided with a second support arm 26. The support arm 27, one end of the second support arm 27 and the other end of the first support arm 26 are both provided with a second jack, a third adjusting bolt 31 is arranged in the second jack, a mounting hole 30 is arranged on one side of the glass plate 29, a second adjusting bolt 28 is arranged in the mounting hole 30, and the second adjusting bolt 28 is fixed to the other end of the second support arm 27, the motor 32 reciprocates, thereby driving the first support arm 26 to rotate, the first support arm 26 drives the second support arm 27 and the glass plate 29 to swing, thereby generating waves on the water surface through the glass plate 29, and the angle of the glass plate 29 can be adjusted through the second adjusting bolt 28, and the angle of the second support arm 27 can be adjusted through the third adjusting bolt 31, thereby changing the amplitude of the simulated waves.

[0040] A second displacement sensing platform 21 is fixed to the top of the pile foundation column 10 by bolts. Three evenly distributed stress sheets 22 are provided on the upper surface of the second displacement sensing platform 21. One side of the stress sheet 22 is electrically connected to a signal line 23. The second displacement sensing platform 21 and the stress sheet 22 can be installed in the displacement test of the pile foundation column 10. The unidirectional force applied to the pile foundation by the uniformly distributed load can be accurately measured through the stress sheet 22, thereby improving the diversity of the device functions. A vortex manufacturing mechanism is provided on the inner wall of one side of the model box 6.

[0041] Embodiment 2

[0042] Reference Figure 1-Figure 8 The present invention provides a new technical solution, a pile foundation model test device under wave-earthquake coupling, a penetrating triangular hole 20 is opened on one side of the base 1, and the triangular hole 20 makes the device more stable when vibrating, six first universal joints 3 are fixed to the upper surface of the base 1 by bolts, and the other ends of the six first universal joints 3 are fixed to the electro-hydraulic vibrator 4 by bolts, and a plurality of rubber rings 2 are bonded to the upper surface of the base 1, and the rubber ring 2 is located between the base 1 and the first universal joint 3, and the rubber ring 2 reduces the vibration effect of the electro-hydraulic vibrator 4 on the ground, weakens the inertia caused by the vibration, and makes the operation of the parts more efficient.

[0043] The tops of the six electro-hydraulic vibrators 4 are all fixed with second universal joints 19 by bolts, the other ends of the six second universal joints 19 are fixed with the same vibration platform 5 by bolts, the upper surface of the vibration platform 5 is fixed with a model box 6 by bolts, and the electro-hydraulic vibrators 4 are started. The liquid flow rate flowing through the unit area inside the electro-hydraulic vibrators 4 simulates the earthquake vibration frequency, and the volume of the flowing liquid simulates the earthquake amplitude, so that the model box 6 vibrates, and the six electro-hydraulic vibrators 4 have six degrees of freedom in vibration directions, thereby achieving the effect of simulating real complex earthquakes.

[0044] A thin metal rod 7 is fixedly connected to the bottom of the pile foundation column 10, and a first displacement sensing platform 9 is fixed to the top of the thin metal rod 7 by bolts. The upper surfaces of the first displacement sensing platform 9 and the second displacement sensing platform 21 are electrically connected with displacement sensing lines 8. The real-time measurement of the bottom displacement of the pile foundation column 10 is similarly achieved through the first displacement sensing platform 9. A mounting plate 13 is fixed to the top of the model box 6 by bolts, and a frequency modulator 12 is fixed to the upper surface of the mounting plate 13 by bolts. A wave making mechanism 11 is provided on the upper surface of the mounting plate 13. The wave making mechanism 11 includes a fixing seat 24, a first support arm 26 and a glass plate 29. A shock absorbing sheet 33 is bonded to the upper surface of the mounting plate 13, and the shock absorbing sheet 33 is located between the mounting plate 13 and the fixing seat 24. The shock absorbing sheet 33 can reduce the influence of the vibration of the device on the motor 32. The fixing seat 24 is fixed to the upper surface of the mounting plate 13 by bolts, and a motor 32 is fixed to the outer wall of one side of the fixing seat 24 by bolts. A first support arm 26 is provided in the fixing seat 24, and the first support arm 2 6 and one side of the fixing seat 24 are both provided with a first plug hole, a mounting shaft 25 is inserted into the first plug hole, and the mounting shaft 25 is fixed to the first support arm 26, one end of the output shaft of the motor 32 is fixed to the mounting shaft 25, the other end of the first support arm 26 is provided with a second support arm 27, one end of the second support arm 27 and the other end of the first support arm 26 are both provided with a second plug hole, a third adjusting bolt 31 is provided in the second plug hole, a mounting hole 30 is provided on one side of the glass plate 29, a second adjusting bolt 28 is provided in the mounting hole 30, and the second adjusting bolt 28 is fixed to the other end of the second support arm 27, the motor 32 reciprocates to drive the first support arm 26 to rotate, the first support arm 26 drives the second support arm 27 and the glass plate 29 to swing, so that waves are generated on the water surface through the glass plate 29, and the angle of the glass plate 29 can be adjusted by the second adjusting bolt 28, and the angle of the second support arm 27 can be adjusted by the third adjusting bolt 31, so as to change the amplitude of the simulated waves.

[0045] A second displacement sensing platform 21 is fixed to the top of the pile foundation column 10 by bolts. Three evenly distributed stress sheets 22 are provided on the upper surface of the second displacement sensing platform 21. One side of the stress sheet 22 is electrically connected to a signal line 23. The second displacement sensing platform 21 and the stress sheet 22 can be installed in the pile top displacement test of the pile foundation column 10, and the unidirectional force applied to the pile foundation by the uniformly distributed load can be accurately measured through the stress sheet 22, thereby improving the diversity of the device functions.

[0046] A vortex-making mechanism is provided on the inner wall of one side of the model box 6, and the vortex-making mechanism includes a fixed column 17, which is fixed to the inner wall of one side of the model box 6 by bolts, and a stirrer 18 is fixed to the top of the fixed column 17 by bolts, and one side of the stirrer 18 is electrically connected to the control line 14, and the control line 14 passes through the model box 6, and the stirrer 18 rotates, thereby simulating the state of the submarine vortex, and a drainage hole is opened on one side of the model box 6, and a drainage pipe 16 is fixed to one side of the drainage hole by bolts, and a control valve is provided on one side of the drainage pipe 16. After the test, the water inside the model box 6 can be quickly discharged through the drainage pipe 16, and a sealing ring 15 is provided on one side of the drainage hole, and the sealing ring 15 is located between the drainage hole and the drainage pipe 16, and the sealing ring 15 increases the sealing between the drainage pipe 16 and the drainage hole, and the motor 32 and the stirrer 18 are both electrically connected to the frequency modulator 12, and the operating efficiency of the motor 32 and the stirrer 18 can be controlled by the frequency modulator 12, thereby improving the experimental effect of the device.

[0047] The advantages of the second embodiment over the first embodiment are:

[0048] 1. By using the metal thin rod 7 and the first displacement sensing platform 9, the real-time measurement of the bottom displacement of the pile foundation column 10 is realized in the same way, thereby improving the measurement accuracy of the device;

[0049] Second, by providing a triangular hole 20 on the base 1, the device can be more stable when vibrating;

[0050] 3. By installing the rubber ring 2 at the bottom of the electro-hydraulic vibrator 4, the vibration effect of the electro-hydraulic vibrator 4 on the ground is reduced, the inertia caused by the vibration is weakened, and the operation of the parts is more efficient.

[0051] When the pile foundation model test device under the wave-earthquake coupling action is used, soil is first added into the model box 6, and water is added after the soil is compacted. The experimental object is placed on the second displacement sensing platform 21, and then the electro-hydraulic vibrator 4 is started. The electro-hydraulic vibrator 4 simulates the earthquake vibration frequency by the liquid flow rate flowing through the unit area, and simulates the earthquake amplitude by the volume of the flowing liquid. The six electro-hydraulic vibrators 4 have six degrees of freedom in vibration directions, thereby achieving the effect of simulating a complex earthquake in reality. Then, the agitator 18 is started, and the agitator 18 rotates the water, thereby simulating a seabed vortex. Then, the motor 32 is started, and the motor 32 rotates back and forth, thereby driving the first support arm 26 to rotate. The first support arm 2 6 drives the second support arm 27 and the glass plate 29 to swing, so that waves are generated on the water surface through the glass plate 29, thereby simulating the situation of sea surface waves. At the same time, the motor 32 and the stirrer 18 are controlled by the frequency modulator 12 to simulate different states of seawater. The displacement distance of the pile foundation column 10 is transmitted to the external displacement display screen through the second displacement sensing platform 21, thereby achieving the purpose of measuring the displacement of the pile foundation column 10. At the same time, the three stress sheets 22 are deformed during the experiment, and the internal resistance changes accordingly, thereby accurately obtaining the three forces applied to the three stress sheets 22, and taking the average value of the three forces to simulate the unidirectional force applied to the pile foundation column 10 by the uniformly distributed load.

[0052] However, as is well known to those skilled in the art, the working principles and wiring methods of the first displacement sensing platform 9, the second displacement sensing platform 21, the stress sheet 22, the electro-hydraulic vibrator 4, the frequency modulator 12, the agitator 18 and the motor 32 are commonplace, and are conventional means or common knowledge, and will not be elaborated herein. Those skilled in the art may make any optional selections according to their needs or convenience.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A pile foundation model test device under wave-seismic coupling, comprising a base (1), characterized in that: The upper surface of the base (1) is fixedly connected to six first universal joints (3), the other ends of the six first universal joints (3) are fixedly connected to an electro-hydraulic vibrator (4), the tops of the six electro-hydraulic vibrators (4) are fixedly connected to a second universal joint (19), the other ends of the six second universal joints (19) are fixedly connected to the same vibration platform (5), the upper surface of the vibration platform (5) is fixedly connected to a model box (6), the top of the model box (6) is fixedly connected to a mounting plate (13), the upper surface of the mounting plate (13) is fixedly connected to a frequency modulator (12), and the mounting plate (13) is fixedly connected to a frequency modulator (12). A wave making mechanism (11) is provided on the upper surface of the mounting plate (13), the wave making mechanism (11) comprising a fixing seat (24), a first supporting arm (26) and a glass plate (29), the fixing seat (24) being fixed to the upper surface of the mounting plate (13) by means of bolts, a motor (32) being fixedly connected to an outer wall of one side of the fixing seat (24), a first supporting arm (26) being provided inside the fixing seat (24), a first plug hole being provided on one side of the first supporting arm (26) and the fixing seat (24), a mounting shaft (25) being movably connected in the first plug hole, and the mounting shaft The first support arm (25) is fixed to the first support arm (26), one end of the output shaft of the motor (32) is fixed to the mounting shaft (25), the other end of the first support arm (26) is provided with a second support arm (27), one end of the second support arm (27) and the other end of the first support arm (26) are both provided with a second plug hole, a third adjusting bolt (31) is provided in the second plug hole, a mounting hole (30) is provided on one side of the glass plate (29), a second adjusting bolt (28) is provided in the mounting hole (30), and the second adjusting bolt (28) is fixed to the other end of the second support arm (27). The model box (6) is fixedly connected to the bottom inner wall of the model box (6), the top of the pile foundation column (10) is fixedly connected to the second displacement sensing platform (21), the upper surface of the second displacement sensing platform (21) is provided with three evenly distributed stress sheets (22), one side of the stress sheet (22) is electrically connected to a signal line (23), and the inner wall of one side of the model box (6) is provided with a vortex generating mechanism; the upper surface of the mounting plate (13) is fixedly connected to a damping sheet (33), and the damping sheet (33) is located between the mounting plate (13) and the fixing seat (24).

2. A pile foundation model test device under wave-earthquake coupling according to claim 1, characterized in that: A thin metal rod (7) is fixedly connected to the inner wall of the bottom of the model box (6); a first displacement sensing platform (9) is fixedly connected to the top of the thin metal rod (7); and displacement sensing wires (8) are electrically connected to the upper surfaces of the first displacement sensing platform (9) and the second displacement sensing platform (21).

3. A pile foundation model test device under wave-earthquake coupling according to claim 2, characterized in that: The vortex-generating mechanism comprises a fixed column (17), the fixed column (17) being fixed to an inner wall of one side of a model box (6) by means of bolts, a stirrer (18) being fixedly connected to the top of the fixed column (17), one side of the stirrer (18) being electrically connected to a control line (14), and the control line (14) passing through the model box (6).

4. The pile foundation model test device under wave-earthquake coupling according to claim 1 is characterized in that: A drainage hole is provided on one side of the model box (6), a drainage pipe (16) is fixedly connected to one side of the drainage hole, and a control valve is provided on one side of the drainage pipe (16).

5. The pile foundation model test device under wave-earthquake coupling according to claim 4 is characterized in that: A sealing ring (15) is provided on one side of the drainage hole, and the sealing ring (15) is located between the drainage hole and the drainage pipe (16).

6. A pile foundation model test device under wave-earthquake coupling according to claim 5, characterized in that: A triangular hole (20) is formed on one side of the base (1).

7. The pile foundation model test device under wave-earthquake coupling according to claim 1 is characterized in that: A plurality of rubber rings (2) are fixedly connected to the upper surface of the base (1), and the rubber rings (2) are located between the base (1) and the first universal joint (3).

8. The pile foundation model test device under wave-earthquake coupling according to claim 3 is characterized in that: The motor (32) and the stirrer (18) are both electrically connected to the frequency modulator (12).

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