Device and method for detecting bearing performance of offshore photovoltaic pile body

Abstract

The invention discloses a device and method for detecting the bearing performance of an offshore photovoltaic pile body, and relates to the technical field of photovoltaic cast-in-place piles. The offshore photovoltaic pile body bearing performance detection device comprises a model box, a counter-force mechanism, a loading mechanism, a stable pile cap and a displacement monitoring mechanism, the counter-force mechanism comprises a frame and a counter-force arm, the frame is arranged outside the model box, and the counter-force arm is movably arranged on a frame cross beam. The loading mechanism comprises a jack and an automatic servo pump, and the jack is connected with the automatic servo pump through a quick-connection oil pipe, so that the automatic servo pump drives the jack. The stabilizing pile cap comprises a mounting part and a contact top plate arranged at the top of the mounting part, the stabilizing pile cap is mounted at the top of the model pile through the mounting part, and the jack is connected with the top of the contact top plate. The displacement monitoring mechanism comprises an inductance dial indicator and a data acquisition box, the inductance dial indicator is mounted at the top of the contact top plate and used for acquiring displacement data of the contact top plate, and the data acquisition box is in communication connection with the inductance dial indicator to record the displacement data of the contact top plate.

Description

Technical Field

[0001] The present disclosure relates to the technical field of photovoltaic cast-in-place piles, and in particular to a device and method for detecting the bearing performance of offshore photovoltaic piles. Background Art

[0002] A pile foundation consists of a pile base and a cap connected to the top of the pile. If the pile base is completely buried in the soil and the bottom of the cap is in contact with the soil, it is called a low-cap pile foundation. If the top of the pile base is exposed above the ground and the bottom of the cap is above the ground, it is called a high-cap pile foundation.

[0003] Pile foundation construction can be divided into two basic types: driven piles and cast-in-place piles, depending on the construction method. Hammer pile driving is currently the most commonly used method. This method utilizes the repeated impact of various pile hammers (such as drop hammers, steam hammers, diesel hammers, hydraulic hammers, and vibratory hammers) and the weight of the pile foundation to overcome the frictional resistance of the pile's side walls and the resistance of the soil at the base, sinking the pile to the designed elevation.

[0004] However, when testing the bearing capacity of pile foundations, for indoor pile driving under laboratory conditions, the current pile drivers are large in size and not easy to enter the room. In addition, the vibration generated by hammering piles is very large, and the soil vibration will endanger the safety of the laboratory civil structure. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the existing technology and provide an offshore photovoltaic pile bearing performance detection device and detection method, which can ensure the stability, accuracy and safety of the pile foundation bearing performance test under different test conditions.

[0006] According to one aspect of the present disclosure, there is provided a device for detecting the bearing performance of an offshore photovoltaic pile, comprising:

[0007] A model box, wherein a model pile and a test soil sample are arranged in the model box, and the bottom of the model pile is buried in the test soil sample;

[0008] The reaction mechanism includes a frame and a reaction arm, wherein the frame is arranged outside the model box, and the reaction arm is movably arranged on the crossbeam of the frame;

[0009] The loading mechanism includes a jack and an automatic servo pump, wherein the jack and the automatic servo pump are connected via a quick-connect oil pipe so that the automatic servo pump drives the jack;

[0010] The stable pile cap includes a mounting portion and a contact top plate provided on the top of the mounting portion. The stable pile cap is used to be mounted on the top of the model pile through the mounting portion. The jack is used to be connected to the top of the contact top plate. The reaction arm, the jack and the center of the contact top plate are collinear in the vertical direction.

[0011] The displacement monitoring mechanism includes an inductance dial indicator and a data acquisition box. The inductance dial indicator is installed on the top of the contact top plate and is used to obtain the displacement data of the contact top plate. The data acquisition box is communicatively connected to the inductance dial indicator to record the displacement data of the contact top plate.

[0012] In an exemplary embodiment of the present disclosure, the offshore photovoltaic pile bearing performance testing device further includes a retractable frame, which is installed in the model box and parallel to the crossbeam of the frame; the retractable frame is perpendicular to the reaction arm;

[0013] A strong magnetic base is installed below the telescopic frame, a clamp is provided on one end of the strong magnetic base away from the telescopic frame, and an inductance dial indicator is installed on the clamp.

[0014] In an exemplary embodiment of the present disclosure, the inductance micrometer includes a first contact and a second contact, both of which are clamped on the top of the contact top plate by a clamp and in contact with the contact top plate; the first contact and the second contact are symmetrical relative to the center of the model pile.

[0015] In an exemplary embodiment of the present disclosure, a first spirit level is embedded in the retractable frame; a second spirit level is provided on the top of the contact top plate, the second spirit level is grooved on the top of the contact top plate, and is symmetrically arranged relative to the center of the model pile.

[0016] In an exemplary embodiment of the present disclosure, a buffer plate is laid on the surface of the test soil sample.

[0017] In an exemplary embodiment of the present disclosure, an automatic servo pump is installed on the surface of the test soil sample, and a seismic-resistant pressure gauge is installed on the top surface of the automatic servo pump.

[0018] According to another aspect of the present disclosure, a method for testing the bearing performance of an offshore photovoltaic pile is provided. The method is conducted using any of the aforementioned offshore photovoltaic pile bearing performance testing devices. The method comprises:

[0019] Deploy the offshore photovoltaic pile bearing performance testing device to ensure that the reaction arm contacts the jack;

[0020] Apply graded dimensional load to the model pile;

[0021] Unload the model pile in stages and read the value of the inductance dial gauge every ten to fifteen minutes after each stage of unloading, at least twice after each stage of unloading;

[0022] After all unloading is completed, read the value of the inductance dial indicator every three to four hours.

[0023] In an exemplary embodiment of the present disclosure, a device for detecting the bearing performance of an offshore photovoltaic pile is deployed, including:

[0024] Insert the model pile into the test soil sample in the model box;

[0025] Install stabilizing pile caps on model piles;

[0026] Arrange the reaction mechanism and the loading mechanism, install the jack on the top of the contact top plate, and make the reaction arm contact with the jack;

[0027] Arrange a displacement monitoring mechanism so that the inductance dial indicator contacts the top plate.

[0028] In an exemplary embodiment of the present disclosure, a reaction mechanism and a loading mechanism are arranged, a jack is installed on the top of the contact top plate, and a reaction arm is brought into contact with the jack, including:

[0029] Position the jack so that it contacts the top of the top plate and is aligned with the center of the model pile;

[0030] Install the automatic servo pump on the surface of the test soil sample and use a quick-connect oil pipe to connect the jack and the automatic servo pump;

[0031] Move the reaction arm to the top of the model pile and slowly lower it toward the jack;

[0032] When the reaction arm drops to three to six centimeters from the top of the jack, the speed is reduced until the reaction arm contacts the jack.

[0033] In an exemplary embodiment of the present disclosure, an automatic servo pump is installed on the surface of the test soil sample, and a seismic-resistant pressure gauge is installed on the top surface of the automatic servo pump;

[0034] The model pile is subjected to graded dimensional loads, including:

[0035] Zero the inductance dial indicator;

[0036] Control the jack to rise until the seismic pressure gauge shows the reading, and then carry out the first level of loading;

[0037] The load is applied in sequence from small to large according to the loading level until the model pile is destroyed.

[0038] The offshore photovoltaic pile bearing performance detection device provided by the present disclosure can be used to perform static load tests on pile foundations in a laboratory environment. The working environment of the pile foundation is simulated by filling the inside of the model box with test soil samples, and boundary condition constraints can be provided to prevent the lateral deformation of the test soil samples from interfering with the test results. Through the reaction mechanism and the loading mechanism, the reaction force required for the bearing performance detection test of the model pile can be provided, replacing the pile load (such as concrete blocks or steel ingots) of the traditional static load test, and at the same time avoiding the vibration effect and safety threat of hammer-type pile driving on the laboratory civil structure. Through the combination of the reaction arm and the jack, the jack is responsible for applying the vertical load, and the automatic servo pump can achieve precise control of the load, which is beneficial to improving the stability and accuracy of the test. The stable pile cap can fix the top of the model pile to avoid eccentric loading, and the contact top plate provides a contact surface for the inductance dial indicator of the displacement monitoring mechanism, which is beneficial for the inductance dial indicator to accurately collect the pile top displacement.

[0039] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0041] Figure 1 It is a schematic diagram of an exemplary embodiment of the offshore photovoltaic pile bearing performance detection device disclosed in the present invention at one viewing angle.

[0042] Figure 2 It is a schematic diagram of an exemplary embodiment of the offshore photovoltaic pile bearing performance detection device disclosed in the present invention from another perspective.

[0043] Figure 3 Schematic diagram of a stable pile cap in an exemplary embodiment of the offshore photovoltaic pile bearing performance detection device disclosed herein.

[0044] Figure 4 This is a schematic diagram of a stable pile cap from another perspective in an exemplary embodiment of the offshore photovoltaic pile bearing performance detection device disclosed herein.

[0045] Figure 5 Schematic diagram of a retractable frame in an exemplary embodiment of the offshore photovoltaic pile bearing performance detection device disclosed herein.

[0046] Figure 6Schematic diagram of a strong magnetic base in an exemplary embodiment of the offshore photovoltaic pile bearing performance detection device disclosed in the present invention.

[0047] Figure 7 Schematic diagram of an automatic servo pump in an exemplary embodiment of the offshore photovoltaic pile bearing performance detection device disclosed herein.

[0048] Figure 8 Schematic diagram of a data acquisition box in an exemplary embodiment of the offshore photovoltaic pile bearing performance detection device disclosed herein.

[0049] Figure 9 The figure is a flow chart of the method for testing the bearing performance of offshore photovoltaic piles disclosed in the present invention.

[0050] Description of reference numerals:

[0051] 100. Model box; 101. Model pile; 102. Test soil sample;

[0052] 11. Reaction arm; 12. Crossbeam; 13. Secondary beam; 14. I-beam column; 15. Hydraulic cylinder; 21. Jack; 22. Automatic servo pump; 221. Control box; 222. Motor; 223. Fuel tank; 23. Quick-connect oil pipe; 24. Anti-seismic pressure gauge;

[0053] 3. Stable pile cap; 31. Mounting part; 32. Contact top plate; 33. Pile cap connecting bolt; 41. Inductance dial indicator; 42. Data acquisition box; 421. Capacitive touch screen; 422. Multi-function plug; 423. Electrical signal data cable;

[0054] 51. Retractable frame; 511. Counter bolt; 52. Strong magnetic base; 521. Scale guide rail; 522. Fixing screw; 53. Chuck; 54. First level; 55. Second level. DETAILED DESCRIPTION

[0055] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent identical or similar structures, and thus their detailed descriptions will be omitted. Furthermore, the figures are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0056] Unless otherwise specified or explained, technical or scientific terms used in this disclosure should have the ordinary meanings understood by persons of ordinary skill in the art to which this disclosure belongs. The terms "a," "an," "the," "the," and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusiveness and indicate that additional elements / components / etc. may be present in addition to the listed elements / components / etc.; the terms "first" and "second" are used only as labels and do not limit the quantity, importance, or order of their objects.

[0057] The terms "connected", "fixed", etc. should be understood in a broad sense. For example, unless otherwise specified, "connected" can be a fixed connection, a movable connection, an integral connection, or a detachable connection. It can be a direct connection or an indirect connection through an intermediate medium.

[0058] The phrase “Part A is provided on Part B” in the present disclosure may mean that Part A is directly connected to Part B, or Part A may be provided on Part C, and Part C may be provided on Part B.

[0059] "Communication connection" can be a wired communication connection or a wireless communication connection, and can be direct communication or indirect signal connection through an intermediate medium.

[0060] Furthermore, in this application, directional terms such as "upper" and "lower" are used solely to indicate relative positional relationships. For example, for convenience, these terms are defined based on the actual operating position and state of the offshore photovoltaic pile bearing performance testing device, or relative to the schematic placement of components in the accompanying drawings. It should be understood that these directional terms are relative and may vary depending on the placement of components in the accompanying drawings and the viewing angle.

[0061] According to a first aspect of the present disclosure, a device for detecting the bearing performance of an offshore photovoltaic pile is provided, Figures 1 to 8 Shown, including:

[0062] A model box 100 is provided with a model pile 101 and a test soil sample 102, and the bottom of the model pile 101 is buried in the test soil sample 102;

[0063] The reaction mechanism includes a frame and a reaction arm 11. The frame is arranged outside the model box 100, and the reaction arm 11 is movably arranged on the crossbeam 12 of the frame;

[0064] The loading mechanism includes a jack 21 and an automatic servo pump 22, wherein the jack 21 and the automatic servo pump 22 are connected via a quick-connect oil pipe 23 so that the automatic servo pump 22 drives the jack 21;

[0065] The stable pile cap 3 includes a mounting portion 31 and a contact top plate 32 provided on top of the mounting portion 31. The stable pile cap 3 is used to be mounted on the top of the model pile 101 through the mounting portion 31. The jack 21 is used to be connected to the top of the contact top plate 32. The reaction arm 11, the jack 21 and the contact top plate 32 are collinear in the vertical direction.

[0066] The displacement monitoring mechanism includes an inductance dial meter 41 and a data acquisition box 42. The inductance dial meter 41 is installed on the top of the contact top plate 32 to obtain the displacement data of the contact top plate 32. The data acquisition box 42 is communicated with the inductance dial meter 41 to record the displacement data of the contact top plate 32.

[0067] refer to Figure 1 As shown, the offshore photovoltaic pile bearing performance detection device provided by the present disclosure can be used to perform static load tests on pile foundations in a laboratory environment. The working environment of the pile foundation is simulated by filling the inside of the model box 100 with a test soil sample 102, and boundary condition constraints can be provided to prevent the lateral deformation of the test soil sample 102 from interfering with the test results. Through the reaction mechanism and the loading mechanism, the reaction force required for the bearing performance detection test of the model pile 101 can be provided, replacing the pile load (such as concrete blocks or steel ingots) of the traditional static load test, and at the same time, the vibration effect and safety threat of hammer-type pile driving on the laboratory civil structure can be avoided. Through the combination of the reaction arm 11 and the jack 21, the jack 21 is responsible for applying the vertical load, and the automatic servo pump 22 can achieve precise control of the load, which is conducive to improving the stability and accuracy of the test. The stable pile cap 3 can fix the top of the model pile 101 to avoid eccentric loading, and the contact top plate 32 provides a contact surface for the inductance dial indicator 41 of the displacement monitoring mechanism, which is conducive to the inductance dial indicator 41 accurately collecting the pile top displacement.

[0068] Specifically, Figure 1 A schematic diagram showing an exemplary embodiment of the offshore photovoltaic pile bearing performance detection device disclosed herein is shown. Figure 2 A schematic top view of a detection device is shown. Figure 2 It is only used for auxiliary illustration to show the top view of some structures and avoid obstruction. Figure 2 Some structures may be hidden and not displayed, and the projection relationship of some structures may not be accurate. Those skilled in the art should immediately realize that such deformation and schematic methods will not affect the actual implementation and protection scope of this solution.

[0069] refer to Figure 1 and Figure 2 As shown, the model box 100 can be welded from steel plates. For example, in one embodiment, the model box 100 is welded from 5 mm thick steel plates, and has a size of 2000 mm×2000 mm×2000 mm.

[0070] The frame can be composed of welded I-beam columns 14 and crossbeams 12, and has high rigidity and stability, ensuring that the reaction mechanism does not deform under the thrust of the reaction arm 11 during the test. For example, the frame can include multiple 5mm thick I-beam columns 14 and crossbeams 12, and the overall dimensions of the frame are 3000mm×3000mm×5000mm; the crossbeams 12 are welded from 5mm thick I-beams and have dimensions of 3000mm×3000mm×400mm. The frame can also include secondary beams 13 parallel to the crossbeams 12 and located on both sides of the crossbeams 12 to further enhance the rigidity and stability of the frame. For example, the frame also includes two secondary beams 13, which are welded from 5mm thick I-beams and have dimensions of 3000mm×3000mm×400mm.

[0071] The reaction arm 11 is movably mounted on the crossbeam 12 of the frame, and can adapt to different positions of the model pile 101, eliminating the space occupation and safety hazards of traditional stacking, and is conducive to conducting experiments under laboratory conditions. For example, the reaction arm 11 is a hydraulic reaction arm 11, refer to Figure 1 As shown, the reaction arm 11 is coaxially connected to the hydraulic cylinder 15.

[0072] In an exemplary embodiment of the present disclosure, referring to Figure 1 、 Figure 3 As shown, the mounting portion 31 of the stable pile cap 3 can be a circular sleeve with a diameter of 180 mm and a wall thickness of 10 mm. The upper portion is a contact top plate 32 made of a square steel plate with a side length of 200 mm and a thickness of 20 mm. The mounting portion 31 and the contact top plate 32 can be connected by welding. The top of the model pile 101 and the mounting portion 31 of the stable pile cap 3 can be connected by pile cap connecting bolts 33. Figure 3 As shown. For example, reference Figure 4 The schematic top view of the stable pile cap 3 is shown. A second level gauge 55 is provided on top of the contact plate 32. The second level gauge 55 is slotted in the top of the contact plate 32 and is symmetrically positioned relative to the center of the model pile 101. During installation of the stable pile cap 3, the model pile 101 and the stable pile cap 3 are secured by tightening the pile cap connecting bolts 33 while observing the second level gauge 55 to ensure the levelness of the contact plate 32.

[0073] In an exemplary embodiment of the present disclosure, the offshore photovoltaic pile bearing performance detection device further includes a retractable frame 51. Figure 1 、 Figure 2 As shown and Figure 5The schematic diagram of the retractable frame 51 shown in the figure shows that the retractable frame 51 is installed inside the model box 100, and the retractable frame 51 is parallel to the crossbeam 12 of the frame; the retractable frame 51 is perpendicular to the reaction arm 11. The retractable frame 51 can be detachably and movably arranged on the inner walls on both sides of the model box 100. For example, the retractable frame 51 is provided with top bolts 511 on both sides. By tightening the top bolts 511 in opposite directions toward the two outer sides of the retractable frame 51, the retractable frame 51 can be firmly fixed inside the model box 100 and the retractable frame 51 can be perpendicular to the reaction arm 11. The retractable frame 51 can serve as an auxiliary support structure of the detection device and fix the reaction arm 11 and the loading mechanism.

[0074] For example, refer to Figure 5 As shown, a first level 54 is embedded in the retractable frame 51 to ensure the horizontality of the retractable frame 51 and the verticality of the entire device. In addition, the retractable design of the retractable frame 51 is convenient for disassembly and can adapt to the sizes of different model boxes 100. The modular design facilitates disassembly and transportation.

[0075] For example, refer to Figure 1 As shown, a strong magnetic base 52 is installed below the retractable frame 51. Figure 6 A schematic diagram of a strong magnetic base 52 is shown as an example. A chuck 53 is provided at one end of the strong magnetic base 52 away from the retractable frame 51, and the inductance dial indicator 41 is mounted on the chuck 53. Specifically, the strong magnetic base 52 may include a scale guide 521 and a fixing screw 522. When assembling the detection device, the strong magnetic base 52 may be placed below the retractable frame 51. The strong magnetic base 52 may be arranged in pairs. Specifically, the strong magnetic base 52 may be arranged at a symmetrical position on the model pile 101. The chuck 53 of the strong magnetic base 52 may be fixed downward to the bottom of the retractable frame 51 by rotating and turning on the magnetic switch. The height of the chuck 53 is adjusted by sliding the scale guide 521 and fixed by the fixing screw 522. After the inductance dial indicator 41 is mounted on the chuck 53, the contacts of the inductance dial indicator 41 are in contact with the contact top plate 32.

[0076] When installing the inductance dial indicator 41 on the clamp 53, loosen the clamp 53 appropriately to clamp the inductance dial indicator 41. After tightening the inductance dial indicator 41, check the verticality of the inductance dial indicator 41 to ensure that it is perpendicular to the contact top plate 32 to improve the accuracy of the displacement data obtained by the inductance dial indicator 41 when contacting the top plate 32.

[0077] Specifically, in an exemplary embodiment of the present disclosure, referring to Figure 1As shown, the inductance dial gauge 41 includes a first contact and a second contact. Both the first contact and the second contact are clamped by a clamp 53 and are located on top of the contact plate 32, making contact with the contact plate 32. The first and second contacts are symmetrical about the center of the model pile 101. The first and second contacts can accurately measure the displacement data of the contact plate 32 and ensure the levelness of the contact plate 32 at all times, preventing the central axis of the reaction arm 11, jack 21, and model pile 101 from tilting during the test.

[0078] The data acquisition box 42 is in communication with the inductance dial meter 41 to record the displacement data of the contact top plate 32. Figure 8 As shown, data acquisition box 42 includes a capacitive screen 421 and a multifunction plug 422. Data acquisition box 42 is equipped with a removable lithium battery that can be powered by an external power source. A single lithium battery can be charged in a docking station to ensure continuous power during testing. Exemplarily, data acquisition box 42 and inductance dial indicator 41 are connected via a wired communication cable 423.

[0079] Illustratively, the data acquisition box 42 is highly automated, enabling fully automatic loading, unloading, stability assessment, and reading, all without human supervision. The data acquisition box 42 can be equipped with an automatic alarm function to provide immediate warnings for a variety of abnormal conditions, including excessive or uneven settlement, excessive lifting, displacement exceeding the measuring range, displacement sensor failure, hydraulic system failure, and insufficient pressure. Alarm thresholds can be customized based on different construction site conditions. Illustratively, the data acquisition box 42 can be connected to a wireless data transmitter or mobile phone to enable wireless monitoring of on-site inspections. Data is automatically backed up in two ways to ensure data is not lost.

[0080] For example, the automatic servo pump 22 is installed on the surface of the test soil sample 102, and the automatic servo pump 22 is connected to the jack 21 through a quick-connect oil pipe 23. Figure 7 As shown, the automatic servo pump 22 further includes a load control box 221, a motor 222, and an oil tank 223. The automatic servo pump 22 can achieve digital closed-loop precise control of the load through the load control box 221, such as graded loading and voltage stabilization, to reduce human error.

[0081] For example, a seismic pressure gauge 24 is mounted on the top surface of the automatic servo pump 22. During the test, the oil output of the automatic servo pump 22 can be controlled by the control box 221, so that the jack 21 is slowly lifted. After the seismic pressure gauge 24 on the top surface of the automatic servo pump 22 displays a reading, formal loading can be carried out, which is conducive to improving the accuracy of the test.

[0082] In an exemplary embodiment of the present disclosure, a buffer plate is laid flat on the surface of the test soil sample 102. The buffer plate can reduce concentrated pressure to reduce interference, which helps to reduce the reading changes of the inductance dial gauge 41 caused by the movement of personnel and instruments during the test, thereby reducing the impact on the monitoring and collection of test data.

[0083] According to another aspect of the present disclosure, a method for testing the bearing performance of an offshore photovoltaic pile is provided, wherein any of the above-mentioned offshore photovoltaic pile bearing performance testing devices is used for testing. Figure 9 As shown, the offshore photovoltaic pile bearing performance detection method includes steps S1000 to S4000:

[0084] Step S1000 : deploying an offshore photovoltaic pile bearing performance detection device so that the reaction arm 11 contacts the jack 21 .

[0085] Step S2000: applying graded dimensional load to the model pile 101.

[0086] Step S3000: The model pile 101 is unloaded in stages, and the value of the inductance dial gauge 41 is read every ten to fifteen minutes after each stage of unloading, and the value is read at least twice after each stage of unloading.

[0087] Step S4000: After all unloading is completed, read the value of the inductance dial gauge 41 every three to four hours.

[0088] The offshore photovoltaic pile bearing performance detection method provided by the present disclosure can be used to perform static load tests on pile foundations in a laboratory environment. During the test, the detection device can be set up according to the actual pile sinking position of the model pile 101 in the model box 100. For example, the detection device is set up within the maximum telescopic fixed range of the retractable frame 51, while taking into account the operability of the test personnel to observe and record the test data and phenomena. By providing the reaction force required for the bearing performance detection test of the model pile 101 through the reaction mechanism and the loading mechanism, the pile load required in the ordinary static load test can be eliminated, the operating space is saved, and the safety and flexibility of the test are improved.

[0089] For example, the oil output of the automatic servo pump 22 is controlled by the load control box 221 to achieve loading and maintaining according to a predetermined pressure level, which can improve the accuracy of the test. After the test is completed, the load control box 221 is closed to allow the hydraulic oil to flow back to the oil tank 223.

[0090] Specifically, step S1000, deploying an offshore photovoltaic pile bearing performance detection device, may include steps S1100 to S1400.

[0091] Step S1100 : inserting the model pile 101 into the test soil sample 102 in the model box 100 .

[0092] Step S1200 : Installing the stable pile cap 3 on the model pile 101 .

[0093] Step S1300 : Arrange the reaction mechanism and the loading mechanism, install the jack 21 on the top of the contact top plate 32 , and make the reaction arm 11 contact the jack 21 .

[0094] Step S1400 : deploying a displacement monitoring mechanism to bring the inductance dial gauge 41 into contact with the top contact plate 32 .

[0095] One possible implementation involves: in step S1100, vibratory pile driving is selected to penetrate the model pile 101. After the pile driving is completed, the model pile 101 is allowed to rest according to test requirements. In step S1200, the top of the model pile 101 is cleaned with a brush, and the stabilizing pile cap 3 is installed. The model pile 101 and the stabilizing pile cap 3 are secured by tightening the pile cap connecting bolts 33, and the second level 55 is observed to ensure that the contact top plate 32 is level.

[0096] Step S1300, arranging the reaction mechanism and the loading mechanism, installing the jack 21 on the top of the contact top plate 32, and making the reaction arm 11 contact the jack 21, can include steps S1310 to S1340:

[0097] Step S1310 : placing the jack 21 on the top of the contact top plate 32 and aligning it with the center of the model pile 101 .

[0098] Step S1320 : Install the automatic servo pump 22 on the surface of the test soil sample 102 , and use the quick-connect oil pipe 23 to connect the jack 21 and the automatic servo pump 22 .

[0099] Step S1330 : Move the reaction arm 11 to just above the model pile 101 and slowly lower it toward the jack 21 .

[0100] Step S1340 : When the reaction arm 11 descends to a distance of three to six centimeters from the top of the jack 21 , the movement speed is reduced until the reaction arm 11 contacts the jack 21 .

[0101] One possible implementation is to place the jack 21 at the center of the top of the contact top plate 32. After positioning is completed, use the quick-connect oil pipe 23 to connect the jack 21 to the automatic servo pump 22, and confirm that the joint of the quick-connect oil pipe 23 is secure. Move the reaction arm 11 to the top of the model pile 101 and slowly lower it towards the jack 21. When it drops to about five centimeters from the top of the jack 21, it switches to a point drop until the reaction arm 11 and the jack 21 are in micro-contact. For example, the "micro-contact" mentioned in this disclosure refers to the reaction arm 11 being lowered in a point or at a low and uniform speed until it contacts the jack 21 and then quickly stops, so that the relative force between the reaction arm 11 and the jack 21 is extremely low. It should be noted that due to the upper limit of precision in the process and control, the relative force between the reaction arm 11 and the jack 21 may not reach 0. Those skilled in the art will understand that the concept of "micro-contact" mentioned in this disclosure is within the range allowed by precision.

[0102] Specifically, in step S1400, when arranging the displacement monitoring mechanism, a possible implementation method is: after the reaction arm 11 is in micro-contact with the jack 21, install the strong magnetic base 52 and the inductance dial indicator 41. Place the retractable frame 51 on one side of the model pile 101 on the inner wall of the model box 100, and tighten the top bolts 511 on both sides in reverse to ensure that the retractable frame 51 is perpendicular to the reaction arm 11. Then place the strong magnetic base 52 below the retractable frame 51, and when it is at the symmetrical position of the model pile 101, rotate to turn on the magnetic switch and fix the strong magnetic base 52. At the same time, rotate the universal head and slide the scale guide 521 to the specified position, and then slightly tighten the fixing screw 522. When installing the inductance dial indicator 41, loosen the chuck 53 appropriately. After tightening the inductance dial indicator 41, make sure that the inductance dial indicator 41 is perpendicular to the contact top plate 32. The verticality can be ensured by observing from two vertical directions. At the same time, fix the fixing screw 522 at the connection between the universal head and the scale guide rail 521.

[0103] For example, step S2000, applying graded dimensional load to the model pile 101, may include:

[0104] Zero the inductance dial indicator 41;

[0105] Control the jack 21 to lift until the seismic pressure gauge 24 displays the reading, and then carry out the first level loading;

[0106] The dimensional load is applied in order from the smallest to the largest loading level until the model pile 101 is destroyed.

[0107] One possible implementation method is: after checking that the offshore photovoltaic pile bearing performance detection device is correctly arranged, first adjust the inductance dial meter 41 to zero, and at the same time ensure that the two inductance dial meters 41 (or the first contact and the second contact of the inductance dial meter 41) are symmetrical and perpendicular to the contact top plate 32 to ensure that the data acquisition box 42 reads accurately.

[0108] The jack 21 is then lifted to perform preloading. Specifically, the oil output of the automatic servo pump 22 is controlled by the control box 221, so that the jack 21 is slowly lifted. After the anti-seismic pressure gauge 24 of the automatic servo pump 22 displays a reading, formal loading is performed, so that the reaction arm 11 and the jack 21 can be micro-contacted.

[0109] During the graded dimensional load loading process, the system proceeds according to the predetermined number of loading stages. Data acquisition box 42 and load control box 221 are monitored during each stage. If settlement exceeds the specified value or is uneven, if the lift is excessive, or if the displacement exceeds the specified range, data acquisition box 42 will issue an alarm, requiring prompt action. Load control box 221 can also issue an alarm in the event of multiple abnormal conditions, such as a hydraulic system failure or insufficient pressure. Alarm thresholds can be set before the experiment begins.

[0110] After the last level of loading is completed, that is, after the model pile 101 is destroyed, the model pile 101 is subjected to graded unloading. For example, the unloading value for each level is twice the loading value for each level. After each level of unloading, the inductance dial gauge 41 is observed every fifteen minutes to read the residual settlement. Each level is read twice, that is, after each level of unloading, the inductance dial gauge 41 is observed and read again every thirty minutes before proceeding to the next level of unloading. After all unloading is complete, the inductance dial gauge 41 is read again every three to four hours. After the test is completed, the load control box 221 is closed to allow the hydraulic oil to flow back into the oil tank 223.

[0111] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the appended claims.

Claims

1. A device for detecting the bearing performance of an offshore photovoltaic pile, characterized in that: include: A model box (100), wherein a model pile (101) and a test soil sample (102) are provided in the model box (100), and the bottom of the model pile (101) is buried in the test soil sample (102); A reaction mechanism comprises a frame and a reaction arm (11), wherein the frame is arranged outside the model box (100), and the reaction arm (11) is movably arranged on a crossbeam (12) of the frame; The loading mechanism comprises a jack (21) and an automatic servo pump (22), wherein the jack (21) and the automatic servo pump (22) are connected via a quick-connect oil pipe (23), so that the automatic servo pump (22) drives the jack (21); A stable pile cap (3) comprises a mounting portion (31) and a contact top plate (32) provided on the top of the mounting portion (31); the stable pile cap (3) is used to be mounted on the top of the model pile (101) through the mounting portion (31); the jack (21) is used to be connected to the top of the contact top plate (32); the centers of the reaction arm (11), the jack (21) and the contact top plate (32) are collinear in the vertical direction; The displacement monitoring mechanism comprises an inductance dial meter (41) and a data acquisition box (42), wherein the inductance dial meter (41) is installed on the top of the contact top plate (32) and is used to obtain displacement data of the contact top plate (32), and the data acquisition box (42) is communicatively connected to the inductance dial meter (41) to record the displacement data of the contact top plate (32).

2. The offshore photovoltaic pile bearing performance detection device according to claim 1, characterized in that: The offshore photovoltaic pile body bearing performance detection device further comprises a retractable frame (51), the retractable frame (51) being installed in the model box (100), the retractable frame (51) being parallel to the crossbeam (12) of the frame; the retractable frame (51) being perpendicular to the reaction arm (11); A strong magnetic base (52) is installed below the retractable frame (51), and a clamp (53) is provided at one end of the strong magnetic base (52) away from the retractable frame (51), and the inductance dial indicator (41) is installed on the clamp (53).

3. The offshore photovoltaic pile bearing performance detection device according to claim 2, characterized in that: The inductance dial gauge (41) comprises a first contact and a second contact, wherein the first contact and the second contact are both clamped by the clamp (53) and arranged on the top of the contact top plate (32), and are in contact with the contact top plate (32); the first contact and the second contact are symmetrical relative to the center of the model pile (101).

4. The offshore photovoltaic pile bearing performance detection device according to claim 2, characterized in that: A first level (54) is embedded in the retractable frame (51); a second level (55) is provided on the top of the contact top plate (32); the second level (55) is slotted on the top of the contact top plate (32) and is symmetrically arranged relative to the center of the model pile (101).

5. The offshore photovoltaic pile bearing performance detection device according to claim 1, characterized in that: The surface of the test soil sample (102) is paved with a buffer plate.

6. The offshore photovoltaic pile bearing performance detection device according to claim 1, characterized in that: The automatic servo pump (22) is installed on the surface of the test soil sample (102), and a seismic pressure gauge (24) is installed on the top surface of the automatic servo pump (22).

7. A method for testing the bearing performance of offshore photovoltaic piles, characterized in that: The offshore photovoltaic pile body bearing performance detection device according to any one of claims 1 to 6 is used for testing, and the offshore photovoltaic pile body bearing performance detection method comprises: Arranging the offshore photovoltaic pile bearing performance detection device so that the reaction arm (11) contacts the jack (21); Applying graded dimensional load to the model pile (101); Unloading the model pile (101) in stages, and reading the value of the inductance dial gauge (41) every ten to fifteen minutes after each stage of unloading, and reading the value at least twice after each stage of unloading; After all unloading is completed, the value of the inductance dial meter (41) is read at intervals of three to four hours.

8. The offshore photovoltaic pile bearing performance detection method according to claim 7, characterized in that: The offshore photovoltaic pile bearing performance detection device is deployed, including: Penetrating the model pile (101) into the test soil sample (102) in the model box (100); Installing the stable pile cap (3) on the model pile (101); Arranging the reaction mechanism and the loading mechanism, installing the jack (21) on the top of the contact top plate (32), and making the reaction arm (11) contact the jack (21); The displacement monitoring mechanism is arranged so that the inductance dial gauge (41) contacts the contact top plate (32).

9. The offshore photovoltaic pile bearing performance detection method according to claim 8, characterized in that: Arranging the reaction mechanism and the loading mechanism, installing the jack (21) on the top of the contact top plate (32), and making the reaction arm (11) contact the jack (21), including: Placing the jack (21) on top of the contact top plate (32) and aligning it with the center of the model pile (101); The automatic servo pump (22) is installed on the surface of the test soil sample (102), and the jack (21) and the automatic servo pump (22) are connected using the quick-connect oil pipe (23); Move the reaction arm (11) to the top of the model pile (101), and slowly lower it toward the jack (21); When the reaction arm (11) is lowered to a distance of three to six centimeters from the top of the jack (21), the moving speed is reduced until the reaction arm (11) contacts the jack (21).

10. The offshore photovoltaic pile bearing performance detection method according to claim 8, characterized in that: The automatic servo pump (22) is installed on the surface of the test soil sample (102), and a seismic pressure gauge (24) is installed on the top surface of the automatic servo pump (22); The model pile (101) is subjected to graded dimensional load loading, comprising: Zeroing the inductance dial meter (41); Controlling the jack (21) to lift until the anti-seismic pressure gauge (24) displays a reading, and then performing the first level loading; The dimensional load is applied in order from small to large loading levels until the model pile (101) is destroyed.

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