A device for testing a single-pile foundation under multi-directional load in a simulated marine environment

Abstract

This utility model relates to the field of marine engineering, specifically disclosing a multi-directional loading test device for a monopile foundation under simulated marine conditions. The device includes: a ring-shaped rotating device, a ring-shaped sliding rail device, a lifting device, a loading system, a displacement sensor, a cylindrical model box, a model pile, and a controller box. The model pile is installed inside the cylindrical model box. The ring-shaped rotating device is installed on top of the model box. The ring-shaped sliding rail device is installed on top of the ring-shaped rotating device and surrounds the model pile. The lifting device is installed on top of the cylindrical model box and bolted to the ring-shaped rotating device. The loading system uses a servo electric cylinder. This utility model can accurately simulate multi-directional loading, and the loading process is flexible and simple, requiring no disassembly, and has strong practicality.

Description

Technical Field

[0001] This utility model relates to the field of marine engineering technology, specifically to a test device for multi-directional loading of a single pile foundation in a simulated marine environment. Background Technology

[0002] Monopile foundations are suitable not only for shallow water areas but also for deep-water environments. With the advancement of offshore wind power projects, the application of monopile foundations in deep-water areas is becoming increasingly widespread. Large-diameter monopile foundations feature high bearing capacity, small and uniform settlement, effectively supporting large wind turbine units. They also possess excellent horizontal bending resistance, effectively resisting horizontal loads generated by waves and ocean currents in the marine environment. In pile foundation testing simulations, loading tests at different locations on the same pile can lead to significant differences in experimental results. Testing these different locations separately would not only greatly increase the complexity of the experiment but also significantly increase costs. Furthermore, because each location's test needs to be conducted independently, the overall testing cycle is prolonged, potentially resulting in a significant waste of time.

[0003] With the continuous development of marine engineering, especially in projects such as offshore wind power and offshore platforms, the application of pile foundations will become more widespread. Future pile foundations will face more complex marine environments, such as the multiple influences of waves, tides, wind, and seabed geology. Pile foundation design will place greater emphasis on matching geological conditions, and future design methods will be more refined and personalized. Testing piles in different directions and locations within a cylindrical model box allows for a comprehensive understanding of the stress distribution, deformation, and failure modes of the piles at different locations, thereby better evaluating the bearing capacity and mechanical behavior of pile foundations in actual engineering projects. Testing at different locations yields more experimental data, enhancing the representativeness and reliability of the test results. Furthermore, multi-point testing reduces experimental errors caused by accidental factors at a single location, ensuring more comprehensive and accurate experimental results. Summary of the Invention

[0004] This invention addresses the aforementioned problems in the prior art by providing a multi-directional loading test device for a single pile foundation in a simulated marine environment. This device enables loading tests on a single pile in multiple directions within a model box, thereby better evaluating the bearing capacity of the pile foundation in actual engineering projects.

[0005] To achieve the above objectives, this utility model proposes a multi-directional loading test device for a monopile foundation under simulated marine conditions, comprising: a ring rotating device, a collar sliding rail device, a lifting device, a loading system, a displacement sensor, a cylindrical model box, a model pile, and a controller box; the model pile is installed inside the cylindrical model box; the ring rotating device is installed on the top of the model box; the collar sliding rail device is installed on the ring rotating device and arranged around the model pile; the lifting device is installed on the top of the cylindrical model box and bolted to the ring rotating device; the loading system uses a servo electric cylinder.

[0006] Preferably, the annular rotating device includes steel balls, a rotatable aluminum alloy plate, bolt holes, a track groove, an outer ring, an inner ring, and a fixing plate; the bolt holes on the rotatable aluminum alloy plate are aligned with the corresponding bolt holes on the inner wall of the cylindrical model box, and are fixed by bolt connection.

[0007] Preferably, the steel balls in the annular rotating device are arranged in two rows, one row is located between the inner ring and the rotatable aluminum alloy plate, and the other row is located between the fixed plate and the rotatable aluminum alloy plate.

[0008] Preferably, the collar slide rail device includes a slider, a guide groove, a fixing hole, a locking device, a top surface of the slide rail, a bottom surface of the slide rail, bolts, and nuts; the bolts and nuts are used to connect and fix the pile body and the loading system.

[0009] Preferably, the guide groove provides a track for the slider and defines the movement trajectory of the slider; the slider slides along a predetermined trajectory in the guide groove and is fixed by inserting a locking device into a fixing hole.

[0010] Preferably, the lifting device is liftable and includes a positioning hole, a support platform, a support plate, bolts, a base, and a column; the support plate is provided with bolts; the support platform is integrally connected to the support plate and its position is fixed through the positioning hole.

[0011] Preferably, a servo electric cylinder is placed on the support platform, and the weight is supported by a support plate.

[0012] Preferably, the support platform is bolted to the column, which is a cuboid frame with a hollow center for the servo electric cylinder to pass through.

[0013] Preferably, the displacement sensor is installed on the side of the model pile to measure the movement and displacement of the model pile, and to evaluate the bearing capacity of the model pile based on the measurement data.

[0014] Preferably, the controller box is connected to a computer to collect and transmit various detection data from the model box in real time.

[0015] Therefore, this utility model proposes a multi-directional loading test device for a single pile foundation in a simulated marine environment, which has the following beneficial effects:

[0016] (1) This utility model realizes the flexible rotation of the upper part of the cylindrical model box through the ring rotating device and the ring sliding rail device, which drives the servo electric cylinder to rotate synchronously. It can carry out loading tests on piles in different directions, accurately simulate multi-directional loading, and truly reflect the response of piles in complex marine stress environment.

[0017] (2) The lifting device of this utility model has the function of moving up and down, and can accurately adjust the loading position to realize the all-round and multi-angle test of the pile body and obtain a large amount of effective data in a short time.

[0018] (3) This utility model effectively reduces the time spent on repeated setup, reduces labor costs and equipment wear and tear, saves on-site testing time, significantly reduces testing costs, and the loading process is flexible and simple. The loading direction can be switched without disassembling the device, making it convenient to operate and improving testing efficiency.

[0019] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a multi-directional loading test device for a single pile foundation in a simulated marine environment according to this utility model.

[0021] Figure 2 This is a schematic diagram of the annular rotating device structure of a multi-directional loading test device for a single pile foundation in a simulated marine environment according to this utility model.

[0022] Figure 3 This is a top view of the annular rotating device of a multi-directional loading test device for a single pile foundation in a simulated marine environment according to this utility model.

[0023] Figure 4 This is a schematic diagram of the collar slide rail device of a multi-directional loading test device for a single pile foundation in a simulated marine environment according to this utility model.

[0024] Figure 5 This is a front view of the collar slide rail device of a multi-directional loading test device for a single pile foundation in a simulated marine environment according to this utility model.

[0025] Figure 6 This is a schematic diagram of the lifting device structure of a multi-directional loading test device for a single pile foundation in a simulated marine environment according to this utility model.

[0026] Figure 7 This is a schematic diagram of the other side of the lifting device of a multi-directional loading test device for a single pile foundation in a simulated marine environment according to this utility model.

[0027] Figure 8 This is a schematic diagram of the lifting platform structure of a multi-directional loading test device for a single pile foundation in a simulated marine environment according to this utility model;

[0028] Figure 9 This is a schematic diagram of the servo electric cylinder structure of a multi-directional loading test device for a single pile foundation in a simulated marine environment according to this utility model.

[0029] Figure 10 This is a schematic diagram of the overall structure of the lifting device and servo electric cylinder of a multi-directional loading test device for a single pile foundation in a simulated marine environment according to this utility model.

[0030] Figure 11 This is a schematic diagram of the upper structure of the annular rotating device of a multi-directional loading test device for a single pile foundation in a simulated marine environment according to this utility model.

[0031] Figure 12 This is a schematic diagram of the base structure of the lifting device of a multi-directional loading test device for a single pile foundation in a simulated marine environment according to this utility model.

[0032] Figure 13 This is a schematic diagram of the connection structure between the lifting device and the ring rotating device of a multi-directional loading test device for a single pile foundation in a simulated marine environment.

[0033] Figure Labels

[0034] 1. Circular rotating device; 101. Steel ball; 102. Rotatable aluminum alloy plate; 103. Circular rotating device bolt hole; 104. Track groove; 105. Outer ring; 106. Inner ring; 107. Fixing plate; 2. Collar slide rail device; 201. Slider; 202. Guide groove; 203. Fixing hole; 204. Locking mechanism; 205. Top surface of slide rail; 206. Bottom surface of slide rail; 207. Collar slide rail device bolt; 208. Collar slide rail device nut; 3. Lifting device; 301. Positioning hole; 302. Bearing platform; 303. Support plate; 304. Lifting device bolt; 305. Base; 306. Column; 4. Servo electric cylinder; 5. Displacement sensor; 6. Cylindrical model box; 7. Controller box; 8. Bolt; 9. Nut; 10. Bolt hole; Detailed Implementation

[0035] To make the technical solution, advantages, and objectives of this utility model clearer, the technical solution of the embodiments of this utility model will be clearly and completely described below. The described embodiments are some, but not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application.

[0036] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0037] like Figure 1 As shown, according to an embodiment of the present invention, a multi-directional loading test device for a single pile foundation in a simulated marine environment includes a ring rotating device 1 rotating on the upper part of a cylindrical model box, a ring sliding rail device 2 rotating in conjunction with the ring rotating device, a lifting device 3 that can move vertically, a servo electric cylinder 4, a displacement sensor 5 for measuring pile displacement changes, a cylindrical model box 6, and a controller box 7.

[0038] like Figures 2-3 As shown, the annular rotating device 1 includes steel balls 101, a rotatable aluminum alloy plate 102, annular rotating device bolt holes 103, a track groove 104, an outer ring 105, an inner ring 106, and a fixing plate 107.

[0039] A ring of steel balls 101 is arranged between the rotatable aluminum alloy plate 102 and the fixed plate 107. At the same time, a track groove 104 is provided in the middle area between the inner ring 106 and the outer ring 105, and a ring of steel balls 101 is also arranged in the track groove 104. The rotation function of the rotatable aluminum alloy plate 102 is realized through the above structure. A ring of bolt holes is provided on the inner ring 106 and the outer ring 105 respectively. When the predetermined fixed position is reached, it can be tightened by bolts.

[0040] The annular rotating device bolt holes 103 are used to fix the position of the rotatable aluminum alloy plate 102. The annular rotating device bolt holes 103 on the rotatable aluminum alloy plate 102 are aligned with the corresponding bolt holes on the inner wall of the cylindrical model box, and are fixed by bolt connection.

[0041] like Figure 4 As shown, the collar slide rail device 2 of this utility model includes a slider 201, a guide groove 202, a fixing hole 203, a locking device 204, a slide rail top surface 205, a slide rail bottom surface 206, a collar slide rail device bolt 207, and a collar slide rail device nut 208.

[0042] In the ring slide rail device 2, the slider 201 slides in the guide groove 202, thereby cooperating with the ring rotating device 1 to rotate around the pile; the top surface 205 and the bottom surface 206 of the slide rail are both provided with fixing holes 203, and when rotated to the predetermined fixed position, the locking device 204 is used to lock it.

[0043] like Figure 5As shown, the collar slide rail device 2 is mounted on the annular rotating device 1 and arranged around the model pile. The collar slide rail device 2 is securely fixed by a clamp structure. By using the cooperation of the collar slide rail device bolt 207 and the collar slide rail device nut 208, a preload is applied to the clamp, thereby firmly locking the collar slide rail device in the predetermined position.

[0044] like Figures 6-7 As shown, the lifting device 3 has a lifting capability and includes positioning holes 301, a support platform 302, a support plate 303, lifting device bolts 304, a base 305, and a column 306. The column 305 has two rows of positioning holes 301 for fixing the position of the support platform 302.

[0045] like Figure 8 As shown, the support platform 302, the support plate 303 and the lifting device bolt 304 are integrated and connected. The support platform 302 is used to place the servo electric cylinder. The height adjustment of the lifting device is achieved by inserting the lifting device bolt 304 into the positioning hole on the column 306 and locking it with a nut to realize its up and down movement function.

[0046] like Figure 10 As shown, the connection between the servo electric cylinder and the lifting device is via... Figure 9 The bolt hole 10 shown is aligned with the positioning hole on the lifting device column 306. The lifting device bolt 304 is used for connection, and the bolt is tightened with a nut to achieve a stable connection between the two.

[0047] like Figures 11-13 As shown, the lifting device base 305 is equipped with bolts 8, and the annular rotating device has bolt holes 10 at corresponding positions for connection. During connection, the lifting device base 305 is first aligned with the installation position of the annular rotating device, ensuring precise alignment of the bolts 8 and bolt holes 10. Then, the bolts 8 are screwed into the bolt holes 10, and the nuts are used to securely connect the lifting device base 305 and the annular rotating device, thus achieving a stable connection between the lifting device and the model box.

[0048] Displacement sensor 5 is positioned between the servo cylinder and the pile. This sensor records the displacement changes of the simulated pile in various directions during multi-directional loading in real time. The high-precision displacement sensor accurately measures the pile's displacement in horizontal, vertical, and other directions, providing data support for analyzing the pile's deformation characteristics.

[0049] In a specific embodiment, the installation steps of a multi-directional loading test device for a monopile foundation simulating a marine environment are as follows:

[0050] (1) Connect the lifting device to the annular rotating device on the cylindrical model box with bolts;

[0051] (2) Fix the lifting device's support platform and the column at the designated installation position using bolts;

[0052] (3) The servo electric cylinder is connected to the lifting device by riveting process to ensure the stability of the connection part;

[0053] (4) The servo electric cylinder is connected to the pile by clamps, and the installation is successful.

[0054] In a specific embodiment, the working principle of a multi-directional loading test device for a monopile foundation simulating a marine environment is as follows:

[0055] A servo electric cylinder is used to apply load to the pile to reproduce the stress state in actual working conditions; the load application position is adjusted by the lifting device to apply load to different heights of the pile and test the stress on the pile side at different heights; the load is applied to different directions of the same pile by rotating the ring rotating device and the collar slide rail device to realize multi-directional stress simulation; when the load reaches the predetermined value, the loading is stopped and the final load value and displacement data are recorded.

[0056] Therefore, this invention provides a multi-directional loading test device for monopile foundations in a simulated marine environment. Through the coordinated action of a ring-shaped rotating device and a collar-shaped sliding rail device, the servo cylinder achieves rotation around the pile. Simultaneously, the lifting device within the apparatus can drive the servo cylinder to move vertically, enabling it to perform loading operations in different directions and at different heights, thereby obtaining more comprehensive experimental data.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A device for testing a single pile foundation under multi-directional load in a simulated marine environment, characterized in that, include: The system comprises a ring-shaped rotating device, a collar slide rail device, a lifting device, a loading system, a displacement sensor, a cylindrical model box, model piles, and a controller box. The model piles are installed inside the cylindrical model box. The ring-shaped rotating device is installed on top of the model box. The collar slide rail device is installed on top of the ring-shaped rotating device and surrounds the model piles. The lifting device is installed on top of the cylindrical model box and bolted to the ring-shaped rotating device. The loading system uses a servo electric cylinder.

2. The device for testing the multi-directional loading of a single pile foundation in a simulated marine environment according to claim 1, characterized in that, The annular rotating device includes steel balls, a rotatable aluminum alloy plate, bolt holes, a track groove, an outer ring, an inner ring, and a fixing plate; the bolt holes on the rotatable aluminum alloy plate are aligned with the corresponding bolt holes on the inner wall of the cylindrical model box, and are fixed by bolt connection.

3. The device for testing the multi-directional loading of a single pile foundation in a simulated marine environment according to claim 2, characterized in that, In the annular rotating device, the steel balls are arranged in two rows, one row is located between the inner ring and the rotatable aluminum alloy plate, and the other row is located between the fixed plate and the rotatable aluminum alloy plate.

4. The device according to claim 1, wherein, The collar slide rail device includes a slider, guide groove, fixing hole, locking device, slide rail top surface, slide rail bottom surface, bolts, and nuts; the bolts and nuts are used to connect and fix the pile body and the loading system.

5. The multi-directional loading test device for a single pile foundation in a simulated marine environment according to claim 4, characterized in that, The guide groove provides a track for the slider and defines the slider's movement trajectory; the slider slides along the predetermined trajectory in the guide groove and is fixed by inserting a locking device into the fixing hole.

6. The multi-directional loading test device for a single pile foundation in a simulated marine environment according to claim 1, characterized in that, The lifting device is liftable and includes a positioning hole, a support platform, a support plate, bolts, a base, and a column; bolts are provided on the support plate; the support platform is integrally connected to the support plate and its position is fixed through the positioning hole.

7. The multi-directional loading test device for a single pile foundation in a simulated marine environment according to claim 6, characterized in that, A servo electric cylinder is placed on the support platform, and the weight is supported by a support plate.

8. The multi-directional loading test device for a single pile foundation in a simulated marine environment according to claim 6, characterized in that, The support platform is bolted to the column, which is a rectangular frame with a hollow center for the servo electric cylinder to pass through.

9. The multi-directional loading test device for a monopile foundation in a simulated marine environment according to claim 1, characterized in that, The displacement sensor is installed on the side of the model pile to measure the movement and displacement of the model pile, and to evaluate the bearing capacity of the model pile based on the measurement data.

10. The multi-directional loading test device for a single pile foundation in a simulated marine environment according to claim 1, characterized in that, The controller box is connected to a computer to collect and transmit various detection data from the model box in real time.

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