Marine environment multi-physics coupling load high-precision testing device

Abstract

The invention relates to a marine environment multi-physics coupling load high-precision testing device. A pile foundation is arranged on a pile foundation mounting plate, and a wave generator is arranged in a testing box; the plurality of mounting sleeves are connected with the pile foundation contact piece through the elastic connecting mechanism; the horizontal load loading source transmits load to the pile foundation contact piece through a horizontal load loading rod penetrating through the mounting sleeve and the elastic connecting mechanism, and the unbalance load adjusting assembly is connected with the elastic connecting mechanism so as to adjust the loading angle of the pile foundation contact piece; the pile foundation vertical load loading assembly is mounted at the top of the test box, so that during test, the pile foundation vertical load loading assembly can simulate a vertical load, the plurality of horizontal load loading sources and the unbalance load adjusting assembly are matched to simulate horizontal loads at different angles and in different directions, and the wave generator enables seawater in the test box to generate tidal changes; the coupling conditions of various loads such as upper structure load, wind load and tide borne by an actual pile foundation are simulated, and the accuracy and authenticity of test data are improved.

Description

Technical Field

[0001] The present application relates to the field of marine engineering foundation engineering technology, and in particular to a high-precision testing device for multi-physical field coupled loads in a marine environment. Background Art

[0002] At present, the working environment of marine engineering pile foundation is complex and the stress forms are diverse. As the supporting member of the upper structure, it bears the deadweight load transmitted to the top of the pile by the upper structure, and is also subject to the long-term action of horizontal cyclic loads such as wind and waves. In addition, in the fields of port terminals, cross-sea bridges, etc., the pile foundation is also subject to the vertical cyclic load generated by the upper passing vehicles and mobile working units; the terminal structure is also subject to ice loads and ship impact loads during operation.

[0003] Compared with static load, the performance of pile foundation under cyclic load is different. Cyclic load will destroy the structure of soil around the pile, reduce soil strength, increase pore water pressure in soil around the pile, and reduce effective stress. The combined effect of the two causes soil stiffness attenuation, increased plastic strain and cumulative deformation of soil around the pile, and reduced bearing capacity of pile foundation. Previous studies have shown that compared with single cyclic load, pile foundation is often more susceptible to instability under composite loading conditions.

[0004] Most of the corresponding engineering designs use the pile foundation design method under a single static load, and only conduct load tests in a single horizontal direction. In addition, the tides in the marine environment cause changes in the ocean water level and wave splashes, which will also have a corresponding impact on the engineering pile foundation. Therefore, it is necessary to develop a device that can take into account the upper force of the pile foundation and the impact of the ocean tide on the engineering foundation for testing. Summary of the invention

[0005] The embodiment of the present application provides a high-precision test device for multi-physical field coupled loads in a marine environment to solve the problem in the related art that it is difficult to accurately perform tests while taking into account the upper force of the pile foundation and the influence of the ocean tide on the corresponding engineering foundation.

[0006] In a first aspect, a high-precision test device for multi-physical field coupled loads in a marine environment is provided, comprising: The test box has openings at the top and bottom; the bottom of the test box is connected to the pile foundation mounting plate, and the pile foundation mounting plate and the internal space of the test box form a test cavity; a wave generator is arranged in the test box; A plurality of mounting sleeves are mounted on the inner wall of the test box and are distributed in a circle with the center of the pile foundation mounting plate as the center; the mounting sleeve is arranged horizontally, and an elastic connection mechanism is provided at one end thereof facing the test cavity, and a pile foundation contact piece is connected to the elastic connection mechanism; a horizontal load loading rod is provided inside the mounting sleeve, one end of the horizontal load loading rod is connected to the pile foundation contact piece, and the other end passes through the mounting sleeve and the test box, and is connected to a horizontal load loading source; an eccentric load adjustment component is provided on the top of the test box; the bottom of the eccentric load adjustment component is connected to the elastic connection mechanism, so as to adjust the loading angle of the pile foundation contact piece; A support frame is installed on the top of the test box and is provided with a pile foundation vertical load loading assembly.

[0007] In some embodiments, the test box is provided with a plurality of through holes; one mounting sleeve coaxially corresponds to one through hole; A fixing plate is provided on the outside of the horizontal load loading source, and fixing rods are connected between the fixing plate and the outside of the test box and around the through hole; one end of the horizontal load loading rod is connected to the horizontal load loading source, and the other end passes through the through hole, the elastic connection mechanism and the mounting sleeve in sequence, and is connected to the central axis position of the pile foundation contact piece.

[0008] In some embodiments, the elastic connection mechanism includes a rubber bellows, a connector and a plurality of flexible rods; the plurality of flexible rods are distributed around the outer side of the rubber bellows with the central axis of the mounting sleeve as the center; the two ends of each flexible rod are respectively sealed and connected to the mounting sleeve and the connector; the two ends of the rubber bellows are respectively sealed and connected to the mounting sleeve and the connector; One end of the connector away from the flexible rod is detachably connected to the pile foundation contact piece.

[0009] In some embodiments, a pile foundation contact piece installation groove is provided at one end of the connector away from the flexible rod; a planar installation portion is provided on the outer circumference of the connector; a first threaded hole communicating with the pile foundation contact piece installation groove is provided on the planar installation portion; and a locking screw is provided on the first threaded hole.

[0010] In some embodiments, the eccentric load adjustment assembly includes a horizontal seat, on which a vertical adjustment structure is provided; one end of the horizontal seat is connected to the top surface of the test box, and the other end is located directly above the connector; The planar mounting portion is provided with a second threaded hole connected to the bottom of the vertical adjustment structure.

[0011] In some embodiments, a third threaded hole is provided on the eccentric load adjustment assembly; The vertical adjustment structure comprises a second screw rod, a third screw rod, and a first screw rod connected to the third threaded hole, wherein a fourth threaded hole extending upward is provided at the center of the bottom end surface of the first screw rod; The second screw and the first screw have the same diameter; the third screw has a smaller diameter than the second screw and is the same diameter as the fourth threaded hole; the third screw is coaxially mounted on the top surface of the second screw and is threadedly connected to the fourth threaded hole; the length of the fourth threaded hole is greater than the length of the third screw; A positioning hole coaxial with the fourth threaded hole is provided at the center of the bottom end surface of the first screw rod, and the cross-sectional area of ​​the positioning hole is larger than that of the fourth threaded hole; a limiting block is threadedly connected to the positioning hole on the third screw rod.

[0012] In some embodiments, the pile foundation contact piece includes a connecting round rod, one end of which is connected to the connecting head via a pile foundation contact piece mounting groove, a first threaded hole and a locking screw; and the other end of the round rod is provided with an arc-shaped contact plate.

[0013] In some embodiments, the support frame includes a plurality of support rods, a mounting platform is provided on the top of the support rods, a connecting block is provided on the bottom of the mounting platform, and the bottom of the connecting block is connected to the pile foundation vertical load loading assembly; a diagonal rod is provided between the plurality of support rods and the connecting block.

[0014] In some embodiments, a vertical telescopic rod is provided at the bottom of the connecting block, and the bottom of the vertical telescopic rod is connected to the pile foundation vertical load loading assembly.

[0015] In some embodiments, the test box includes a plurality of vertical plates and a plurality of rubber connecting plates; two adjacent vertical plates are sealed and connected by the rubber connecting plates to form a cylindrical structure; The top of the pile foundation mounting plate is provided with a plurality of connecting protrusions corresponding to the vertical plate and the rubber connecting plate; the top of the connecting protrusion is provided with a clamping groove connected to the vertical plate and the rubber connecting plate, and a sealing ring in contact with the vertical plate and the rubber connecting plate is provided in the clamping groove; the outer side of the connecting protrusion is provided with a plurality of connecting bolts; the connecting bolts are inserted into the clamping groove and connected with the corresponding vertical plate and the rubber connecting plate; The pile foundation mounting plate is provided with vertical connecting steel bars for connecting with the pile foundation casting.

[0016] The beneficial effects of the technical solution provided by this application include: The present application provides a high-precision test device for multi-physics field coupled loads in a marine environment. Since a pile foundation mounting plate can be used to set up a pile foundation, a wave generator is provided in the test box; a plurality of mounting sleeve walls are installed in the test box in a circular distribution with the center of the pile foundation mounting plate as the center of the circle; the mounting sleeve is connected to the pile foundation contact piece through an elastic connection mechanism; a horizontal load loading source transfers the load to the pile foundation contact piece through a horizontal load loading rod passing through the mounting sleeve and the elastic connection mechanism, and an eccentric load adjustment component is connected to the elastic connection mechanism to adjust the loading angle of the pile foundation contact piece; a pile foundation vertical load loading component is installed on the top of the test box, so that when testing, the pile foundation vertical load loading component can simulate the vertical load, and a plurality of horizontal load loading sources and an eccentric load adjustment component cooperate to simulate horizontal loads at different angles and directions, and a wave generator causes tidal changes in the seawater inside the test box to maximize the simulation of the actual pile foundation being subjected to multiple load coupling conditions such as upper structure load, wind load, tide, etc., thereby improving the accuracy and authenticity of the test data and improving the accuracy of the high-precision test device for multi-physics field coupled loads in a marine environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure of the high-precision test device for multi-physical field coupled loads in a marine environment provided in an embodiment of the present application in a first viewing angle state; Figure 2 Provided for the embodiments of this application Figure 1 A local enlarged schematic diagram of point A in FIG. Figure 3 A schematic diagram of the three-dimensional structure of the high-precision test device for multi-physical field coupled loads in a marine environment provided in an embodiment of the present application in a second viewing angle state; Figure 4 A schematic diagram of the three-dimensional structure of the high-precision test device for multi-physical field coupled loads in a marine environment provided by an embodiment of the present application in a third viewing angle state; Figure 5 Provided for the embodiments of this application Figure 1 Right view in; Figure 6 Provided for the embodiments of this application Figure 5 Schematic diagram of the cross section at the middle BB position; Figure 7 Provided for the embodiments of this application Figure 5 A schematic diagram of the structure of the connection between the installation sleeve, the elastic connection mechanism, and the horizontal load loading rod; Figure 8 A schematic diagram of the three-dimensional structure of a high-precision test device for multi-physical field coupled loads in a marine environment provided in an embodiment of the present application without showing a pile foundation vertical load loading component; Fig. 9A schematic diagram of the three-dimensional structure of the eccentric load adjustment assembly provided in an embodiment of the present application; Fig.10 A schematic diagram of the planar structure of the eccentric load adjustment assembly provided in an embodiment of the present application; Fig.11 Provided for the embodiments of this application Fig.10 Schematic diagram of the internal structure of the middle vertical adjustment structure.

[0018] In the figure: 1. test box; 100. vertical plate; 101. rubber connecting plate; 2. pile foundation mounting plate; 3. mounting sleeve; 4. elastic connecting mechanism; 400. rubber bellows; 401. flexible rod; 402. connector; 403. plane mounting part; 5. pile foundation contact piece; 6. horizontal load loading rod; 7. horizontal load loading source; 8. eccentric load adjustment assembly; 800. horizontal seat; 801. vertical adjustment structure; 8011. first screw rod; 8012. second screw rod; 8013. third screw rod; 8014. positioning hole; 8015. limit block; 8016. fourth threaded hole; 9. support frame; 900. support rod; 901. mounting platform; 10. pile foundation vertical load loading assembly; 11. wave generator; 12. fixing plate; 13. fixing rod. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0020] The embodiment of the present application provides a high-precision test device for multi-physical field coupled loads in a marine environment to solve the problem in the related art that it is difficult to accurately perform tests while taking into account the upper forces of the pile foundation and the influence of the ocean tide on the corresponding engineering foundation.

[0021] See also Figure 1-Figure 11 , a high-precision test device for multi-physical field coupled loads in a marine environment, comprising: The test box 1 has openings at the top and bottom; the bottom of the test box 1 is connected to the pile foundation mounting plate 2, and the pile foundation mounting plate 2 and the internal space of the test box 1 form a test cavity; a wave generator 11 is provided in the test box 1; A plurality of mounting sleeves 3 are mounted on the inner wall of the test box 1 and are distributed in a circle with the center of the pile foundation mounting plate 2 as the center; the mounting sleeve 3 is arranged horizontally, and an elastic connecting mechanism 4 is arranged at one end thereof facing the test cavity, and a pile foundation contact piece 5 is connected to the elastic connecting mechanism 4; a horizontal load loading rod 6 is arranged inside the mounting sleeve 3, one end of the horizontal load loading rod 6 is connected to the pile foundation contact piece 5, and the other end passes through the mounting sleeve 3 and the test box 1, and is connected to a horizontal load loading source 7; an eccentric load adjustment component 8 is arranged on the top of the test box 1; the bottom of the eccentric load adjustment component 8 is connected to the elastic connecting mechanism 4, so as to adjust the loading angle of the pile foundation contact piece 5; A support frame 9 is installed on the top of the test box 1 and is provided with a pile foundation vertical load applying assembly 10 .

[0022] Through the above arrangement, the pile foundation mounting plate 2 can be used to set the pile foundation, and a wave generator 11 is arranged in the test box 1; a plurality of mounting sleeves 3 are arranged in a circular shape with the center of the pile foundation mounting plate 2 as the center of the circle in the test box 1; the mounting sleeve 3 is connected to the pile foundation contact piece 5 through the elastic connection mechanism 4; the horizontal load loading source 7 transmits the load to the pile foundation contact piece 5 through the horizontal load loading rod 6 passing through the mounting sleeve 3 and the elastic connection mechanism 4, and the eccentric load adjustment component 8 is connected to the elastic connection mechanism 4, and the length of the connection part between the adjustment component 8 and the elastic connection mechanism 4 is changed to adjust the pile foundation contact piece 5. The loading angle of the component 5; the pile foundation vertical load loading component 10 is installed on the top of the test box 1, so that when the test is carried out, the pile foundation vertical load loading component 10 can simulate the vertical load, and the multiple horizontal load loading sources 7 and the eccentric load adjustment component 8 cooperate to simulate the horizontal loads at different angles and directions. The wave generator 11 causes the seawater inside the test box 1 to produce tidal changes to maximize the simulation of the actual pile foundation being subjected to multiple load coupling conditions such as superstructure load, wind load, tide, etc., thereby improving the accuracy and authenticity of the test data and improving the accuracy of the high-precision test device for multi-physical field coupled loads in the marine environment.

[0023] In some preferred embodiments, the test box 1 is provided with a plurality of through holes; one mounting sleeve 3 coaxially corresponds to one through hole; A fixing plate 12 is provided on the outer side of the horizontal load loading source 7, and fixing rods 13 are connected between the fixing plate 12 and the outer side of the test box 1 and around the through hole; one end of the horizontal load loading rod 6 is connected to the horizontal load loading source 7, and the other end passes through the through hole, the elastic connecting mechanism 4 and the mounting sleeve 3 in sequence, and is connected to the central axis position of the pile foundation contact piece 5.

[0024] Furthermore, the test box 1 includes a plurality of vertical plates 100 and a plurality of rubber connecting plates 101; two adjacent vertical plates 100 are sealed and connected by the rubber connecting plates 101 to form a cylindrical structure; The top of the pile foundation mounting plate 2 is provided with a plurality of connecting protrusions corresponding to the vertical plate 100 and the rubber connecting plate 101; the top of the connecting protrusion is provided with a card slot connected to the vertical plate 100 and the rubber connecting plate 101, and a sealing ring in contact with the vertical plate 100 and the rubber connecting plate 101 is provided in the card slot; the outer side of the connecting protrusion is provided with a plurality of connecting bolts; the connecting bolts are inserted into the card slot and connected with the corresponding vertical plate 100 and the rubber connecting plate 101; The pile foundation mounting plate 2 is provided with vertical connecting steel bars for connecting with the pile foundation casting.

[0025] The above describes the specific connection between the installation sleeve 3, the horizontal load loading rod 6, the horizontal load loading source 7 and the test box 1, and in this embodiment, the specific connection structure between the test box 1 and the pile foundation mounting plate 2 is also introduced; the most preferred test box 1 is a structure with a triangular cross section, and the vertical connecting steel bars on the pile foundation mounting plate 2 are convenient for setting the pile foundation to simulate the real situation. Of course, the pile foundation mounting plate 2 can be provided with undulating pads to simulate the seabed with different undulations. Figure 1 Mark C in the middle.

[0026] In some preferred embodiments, the elastic connection mechanism 4 includes a rubber bellows 400, a connector 402 and a plurality of flexible rods 401; the plurality of flexible rods 401 are distributed around the outer side of the rubber bellows 400 with the central axis of the mounting sleeve 3 as the center; the two ends of each flexible rod 401 are respectively sealed and connected to the mounting sleeve 3 and the connector 402; the two ends of the rubber bellows 400 are respectively sealed and connected to the mounting sleeve 3 and the connector 402; One end of the connector 402 away from the flexible rod 401 is detachably connected to the pile foundation contact piece 5. One end of the connector 402 away from the flexible rod 401 is provided with a pile foundation contact piece installation groove; a plane installation portion 403 is provided on the outer circumference of the connector 402; a first threaded hole communicating with the pile foundation contact piece installation groove is provided on the plane installation portion 403; a locking screw is provided on the first threaded hole.

[0027] The rubber bellows 400 can move along with the pile foundation contact piece 5 during the horizontal movement of the horizontal load loading rod 6, and ensure the sealing inside the installation sleeve 3. In addition, the flexible rod 401 not only ensures the overall rigidity of the elastic connection mechanism 4, and facilitates the stable application of horizontal loads; it also provides the possibility for adjustment of the eccentric load adjustment component 8.

[0028] Furthermore, the eccentric load adjustment assembly 8 includes a horizontal seat 800, on which a vertical adjustment structure 801 is provided; a second threaded hole connected to the bottom of the vertical adjustment structure 801 is provided on the plane mounting portion 403. A third threaded hole is provided on the eccentric load adjustment assembly 8; one end of the horizontal seat 800 is connected to the top surface of the vertical plate 100, and the other end is located directly above the connector 402.

[0029] The vertical adjustment structure 801 includes a second screw rod 8012, a third screw rod 8013, and a first screw rod 8011 connected to the third threaded hole. A fourth threaded hole 8016 extending upward is provided at the center of the bottom end surface of the first screw rod 8011. The second screw 8012 and the first screw 8011 have the same diameter; the third screw 8013 has a smaller diameter than the second screw 8012 and is the same diameter as the fourth threaded hole 8016; the third screw 8013 is coaxially mounted on the top surface of the second screw 8012 and is threadedly connected to the fourth threaded hole 8016; the length of the fourth threaded hole 8016 is greater than the length of the third screw 8013; A positioning hole 8014 coaxial with the fourth threaded hole 8016 is provided at the center of the bottom end surface of the first screw rod 8011 , and the cross-sectional area of ​​the positioning hole is larger than that of the fourth threaded hole 8016 ; a limiting block 8015 is threadedly connected to the third screw rod 8013 and is located in the positioning hole 8014 .

[0030] When the elastic connection mechanism 4 and the eccentric load adjustment assembly 8 are connected, the bottom of the second screw rod 8012 is connected to the screw hole on the plane mounting portion 403 ; and the first screw rod 8011 is connected to the screw hole of the horizontal seat 800 .

[0031] As described above, by rotating the first screw 8011, the distance between the second screw 8012 and the first screw 8011 is changed, so as to achieve the effect of pressing the connector 402 downward or pulling the connector 402 upward, thereby changing the angle between the central axis of the connector 402 and the horizontal plane. For example, when the central axis of the connector 402 needs to be shifted downward, by rotating the first screw 8011, the vertical position of the second screw 8012 will not change, the vertical position of the first screw 8011 will move downward, and the length of the entire vertical adjustment structure 801 will be lengthened, thereby pressing the connector 402 downward, and the flexible rod 401 connected to the connector 402 will be deformed and shifted downward accordingly, and an angle will be generated between the connector 402 and the horizontal plane; When the central axis of the connector 402 needs to be shifted upward, the vertical position of the second screw 8012 will not change, the vertical position of the first screw 8011 will move upward, and the length of the entire vertical adjustment structure 801 will decrease, thereby pulling the connector 402 upward, and the flexible rod 401 connected to the connector 402 will deform and shift upward to achieve angle adjustment. The reason why the above vertical adjustment structure 801 includes the first screw 8011, the second screw 8012, and the third screw 8013 is that if a screw is directly used to connect the two ends of the plane mounting part 403 and the horizontal seat 800 respectively, during the transmission process, the adjustment angle is too large, and the screw will lose the stability of the connection with the screw hole of the plane mounting part 403, that is, when adjusting upward, the connection part with the screw hole of the plane mounting part 403 will be reduced, and there is even a possibility of disconnection.

[0032] The above multiple directions can be understood as each installation sleeve 3 corresponds to a horizontal load loading source 7, and the loading directions of the horizontal load loading sources 7 at different positions are different. This embodiment provides three loading directions, and of course does not exclude other multiple directions.

[0033] In addition, to prevent excessive adjustment and improve the convenience of adjustment, the adjustable distance is determined by rotating the limit block 8015 before adjustment, and then the first screw 8011 is rotated until the limit block 8015 is located in the positioning hole 8014 and cannot be adjusted and rotated, then the adjustment is considered completed.

[0034] The above structure is simple, and utilizes the self-locking characteristic of the thread to achieve the function of self-locking after adjustment.

[0035] In some preferred embodiments, the pile foundation contact member 5 comprises a connecting round rod, one end of which is connected to the connecting head 402 through the pile foundation contact member installation groove, the first threaded hole and the locking screw; and the other end of the round rod is provided with an arc-shaped contact plate, which facilitates contact with the pile on the pile foundation.

[0036] The support frame 9 includes a plurality of support rods 900, a mounting platform 901 is provided on the top of the support rods 900, a connecting block is provided at the bottom of the mounting platform 901, and the bottom of the connecting block is connected to the pile foundation vertical load loading assembly 10; an oblique rod is provided between the plurality of support rods 900 and the connecting block. A vertical telescopic rod is provided at the bottom of the connecting block, and the bottom of the vertical telescopic rod is connected to the pile foundation vertical load loading assembly 10. Thus, it is suitable for simulating pile foundation upper structures of different heights.

[0037] The above describes the installation structure of the pile foundation vertical load applying assembly 10 . The oblique rods provided between the plurality of support rods 900 and the connecting blocks can enhance the overall strength of the support frame 9 .

[0038] The above pile foundation vertical load loading assembly 10 and horizontal load loading source 7 are both common existing equipment and will not be explained here.

Claims

1. A high-precision test device for multi-physical field coupling loads in marine environment, characterized in that: It includes: A test box (1) having openings at the top and bottom; the bottom of the test box (1) is connected to a pile foundation mounting plate (2), and the internal space of the pile foundation mounting plate (2) and the test box (1) forms a test chamber; a wave generator (11) is provided in the test box (1); A plurality of mounting sleeves (3) are mounted on the inner wall of the test box (1) and are distributed in a circle with the center of the pile foundation mounting plate (2) as the center of the circle; the mounting sleeve (3) is arranged horizontally, and an elastic connection mechanism (4) is provided at one end thereof facing the test cavity, and a pile foundation contact piece (5) is connected to the elastic connection mechanism (4); a horizontal load loading rod (6) is provided inside the mounting sleeve (3), one end of the horizontal load loading rod (6) is connected to the pile foundation contact piece (5), and the other end passes through the mounting sleeve (3) and the test box (1), and is connected to a horizontal load loading source (7); an eccentric load adjustment component (8) is provided on the top of the test box (1); the bottom of the eccentric load adjustment component (8) is connected to the elastic connection mechanism (4) to adjust the loading angle of the pile foundation contact piece (5); A support frame (9) is installed on the top of the test box (1) and a pile foundation vertical load loading assembly (10) is provided on the support frame.

2. The high-precision test device for multi-physical field coupled loads in marine environment according to claim 1, characterized in that: The test box (1) is provided with a plurality of through holes; one mounting sleeve (3) coaxially corresponds to one through hole; A fixing plate (12) is provided on the outside of the horizontal load loading source (7), and fixing rods (13) are connected between the fixing plate (12) and the outside of the test box (1) and around the through hole; one end of the horizontal load loading rod (6) is connected to the horizontal load loading source (7), and the other end passes through the through hole, the elastic connection mechanism (4) and the installation sleeve (3) in sequence, and is connected to the central axis position of the pile foundation contact piece (5).

3. The high-precision test device for multi-physical field coupled loads in marine environment according to claim 1, characterized in that: The elastic connection mechanism (4) comprises a rubber bellows (400), a connector (402), and a plurality of flexible rods (401); the plurality of flexible rods (401) are distributed around the outside of the rubber bellows (400) with the central axis of the mounting sleeve (3) as the center of the circle; the two ends of each flexible rod (401) are respectively sealed and connected to the mounting sleeve (3) and the connector (402); the two ends of the rubber bellows (400) are respectively sealed and connected to the mounting sleeve (3) and the connector (402); One end of the connector (402) away from the flexible rod (401) is detachably connected to the pile foundation contact piece (5).

4. The high-precision test device for multi-physical field coupled loads in marine environment according to claim 3, characterized in that: A pile foundation contact piece installation groove is provided at one end of the connector (402) away from the flexible rod (401); a plane installation portion (403) is provided on the outer circumference of the connector (402); a first threaded hole communicating with the pile foundation contact piece installation groove is provided on the plane installation portion (403); and a locking screw is provided on the first threaded hole.

5. The high-precision test device for multi-physical field coupled loads in marine environment according to claim 4, characterized in that: The eccentric load adjustment assembly (8) comprises a horizontal seat (800), on which a vertical adjustment structure (801) is provided; one end of the horizontal seat (800) is connected to the top surface of the test box (1), and the other end is located directly above the connector (402); The planar mounting portion (403) is provided with a second threaded hole connected to the bottom of the vertical adjustment structure (801).

6. The high-precision test device for multi-physical field coupled loads in marine environment according to claim 5, characterized in that: The eccentric load adjustment component (8) is provided with a third threaded hole; The vertical adjustment structure (801) comprises a second screw rod (8012), a third screw rod (8013), and a first screw rod (8011) connected to the third threaded hole, wherein a fourth threaded hole (8016) extending upward is provided at the center of the bottom end surface of the first screw rod (8011); The second screw rod (8012) and the first screw rod (8011) have the same diameter; the third screw rod (8013) has a smaller diameter than the second screw rod (8012) and has the same diameter as the fourth threaded hole (8016); the third screw rod (8013) is coaxially mounted on the top end surface of the second screw rod (8012) and is threadedly connected to the fourth threaded hole (8016); the length of the fourth threaded hole (8016) is greater than the length of the third screw rod (8013); A positioning hole (8014) coaxial with the fourth threaded hole (8016) is provided at the center of the bottom end surface of the first screw rod (8011), and the cross-sectional area of ​​the positioning hole is larger than that of the fourth threaded hole (8016); a limiting block (8015) is threadedly connected to the third screw rod (8013) and is located inside the positioning hole (8014).

7. The high-precision test device for multi-physical field coupled loads in marine environment according to claim 4, characterized in that: The pile foundation contact piece (5) comprises a connecting round rod, one end of which is connected to the connecting head (402) via a pile foundation contact piece installation groove, a first threaded hole and a locking screw; and the other end of the round rod is provided with an arc-shaped contact plate.

8. The high-precision test device for multi-physical field coupled loads in marine environment according to claim 1, characterized in that: The support frame (9) comprises a plurality of support rods (900), a mounting platform (901) is provided at the top of the support rods (900), a connecting block is provided at the bottom of the mounting platform (901), and the bottom of the connecting block is connected to a pile foundation vertical load loading assembly (10); an oblique rod is provided between the plurality of support rods (900) and the connecting block.

9. The high-precision test device for multi-physical field coupled loads in marine environment according to claim 8, characterized in that: A vertical telescopic rod is provided at the bottom of the connection block, and the bottom of the vertical telescopic rod is connected to the pile foundation vertical load loading assembly (10).

10. The high-precision test device for multi-physical field coupled loads in marine environment according to claim 1, characterized in that: The test box (1) comprises a plurality of vertical plates (100) and a plurality of rubber connecting plates (101); two adjacent vertical plates (100) are sealed and connected via the rubber connecting plates (101) to form a cylindrical structure; The top of the pile foundation mounting plate (2) is provided with a plurality of connection protrusions corresponding to the vertical plate (100) and the rubber connection plate (101); the top of the connection protrusion is provided with a clamping groove connected to the vertical plate (100) and the rubber connection plate (101), and a sealing ring in contact with the vertical plate (100) and the rubber connection plate (101) is provided in the clamping groove; the outer side of the connection protrusion is provided with a plurality of connection bolts; the connection bolts are inserted into the clamping groove and connected to the corresponding vertical plate (100) and the rubber connection plate (101); The pile foundation mounting plate (2) is provided with vertical connecting steel bars for connecting with the pile foundation casting.

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