Static load test device of small-diameter pipe pile suitable for fishing-light complementary project

Abstract

A static load test device of a small-diameter tubular pile suitable for a fishing-light complementary project comprises a test pile, a vertical force applying assembly, a counter-force assembly and a measuring assembly, the vertical force applying assembly is arranged between the top of the test pile and the counter-force assembly and used for applying vertical pressure, the counter-force assembly is used for providing counter force, and the measuring assembly is used for measuring the counter-force. The measuring assembly is used for settlement observation; the counter-force assembly comprises a counter-force pile, a counter-force frame, a bearing plate and a lifting hoist; the two counter-force piles are symmetrically arranged on the two sides of the test pile, and the counter-force frame is fixedly connected between the two counter-force piles and located above the water surface; the bearing plate is arranged at one end, deviating from the test pile, of the vertical force applying assembly; on one side of the test pile, a fixing hook of the lifting hoist is fixed to the reaction frame through a reaction chain, and on the other opposite side of the test pile, a lifting chain of the lifting hoist penetrates through the bearing plate to be fixedly connected with the reaction frame. The device has the advantages of being small in size, light in weight and easy to splice, can effectively meet the requirements of water operation, and can improve the test precision and save the cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building structure monitoring, and particularly relates to a static load test device suitable for small-diameter pipe piles of fish-light complementary projects. BACKGROUND

[0002] It is known that a fish-light complementary project is a project combining water photovoltaic power generation with fishery, that is, solar cell panels are erected on fish ponds to achieve double benefits of power generation and breeding.

[0003] The upper photovoltaic structure of a fish-light complementary project has very high requirements for the pile foundation structure. In order to meet the stability and safety requirements, the bearing capacity test of the pile foundation, especially the vertical compression bearing capacity test of the single pile, needs to be carried out. This test helps to ensure that the pile foundation will not settle or deform when bearing the weight of the photovoltaic panel and related equipment.

[0004] In the scenario of a fish-light complementary project, small-diameter pipe piles with an outer diameter size range of generally 300mm-600mm are often used as pile foundation structures of photovoltaic structures, because such small-diameter high-strength prestressed pipe piles have superior performance in bearing capacity and deformation capacity.

[0005] However, because the pile foundation part above the water surface of a fish-light complementary project is much higher than that of other projects, and the pile foundation stands above the water surface, it is not convenient to use large machinery for construction, thereby causing the bearing capacity test of the above-mentioned small-diameter pipe piles to be unable to be completed by using traditional static load test devices and methods (for example, a single pile vertical compression static load device based on an anchor pile counterforce device, a weight counterforce device, an anchor pile and weight combined counterforce device, or a ground anchor counterforce device).

[0006] At present, a known detection tool and detection method for a fish-light complementary photovoltaic power generation super-high pile foundation can be used for the vertical compression bearing capacity test of a single pile of a fish-light complementary photovoltaic power generation super-high pile foundation to some extent. However, at least the following problems still exist:

[0007] 1. The detection tool is only suitable for a fish-light complementary project with exposed foundation, that is, the fish pond needs to be drained of water before use, and cannot adapt to water surface operation;

[0008] 2. The detection tool uses stone blocks + beams to provide counterforce, which essentially still belongs to a traditional weight counterforce device, and still has the characteristics of a heavy structure, which is limited by the environment of the water surface photovoltaic operation without large construction device activities, cannot adapt to water surface operation, and cannot meet the needs of small and medium-sized device operation in a fish-light complementary project.

[0009] The information disclosed in this Background section is only for the purpose of increasing an understanding of the general context of the present application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art. SUMMARY

[0010] The present application aims to solve at least one of the technical problems in the related art. To this end, the present application proposes a static load test device for small-diameter pipe piles in fish-light complementary projects, which not only has the advantages of small volume, light weight, and easy splicing, but also effectively meets the needs of water operations, and improves test accuracy and saves costs.

[0011] According to the static load test device for small-diameter pipe piles in fish-light complementary projects, the device comprises a test pile, a vertical force applying assembly, a counterforce assembly, and a measuring assembly. The vertical force applying assembly is arranged between the top of the test pile and the counterforce assembly. The vertical force applying assembly is used to apply vertical pressure. The counterforce assembly is used to provide counterforce. The measuring assembly is used to observe settlement.

[0012] The counterforce assembly comprises counterforce piles, a counterforce frame, a pressure bearing plate, and a lifting hoist. Two counterforce piles are symmetrically arranged on both sides of the test pile. The counterforce frame is fixedly connected to the middle of the two counterforce piles and located above the water surface. The pressure bearing plate is arranged at the end of the vertical force applying assembly away from the test pile.

[0013] On one side of the test pile, the fixed hook of the lifting hoist is fixed to the counterforce frame through a counterforce chain. On the other side of the test pile, the lifting chain of the lifting hoist is fixedly connected to the counterforce frame through the pressure bearing plate.

[0014] According to some embodiments of the present application, the counterforce frame comprises first counterforce frame structures and second counterforce frame structures. The inner sides of the two first counterforce frame structures are fixedly connected through the two second counterforce frame structures and collectively surround the outer periphery of the test pile.

[0015] The two ends of each first counterforce frame structure are respectively fixedly connected to the corresponding counterforce pile through an integrated hoop A. The first counterforce frame structure is docked with the integrated hoop A through a connection end portion a having a first hollow slot.

[0016] According to some embodiments of the present application, the middle of the two counterforce piles is further fixedly connected with a workbench, and the workbench is located above the counterforce frame.

[0017] The two ends of the workbench are respectively fixedly connected to the corresponding counterforce pile through an integrated hoop B. The workbench is docked with the integrated hoop B through a connection end portion b having a second hollow slot.

[0018] According to some embodiments of the present application, the vertical force applying assembly comprises a jack, the bottom end of the jack is placed on the pile top of the test pile, and the pressure bearing plate is placed on the top end of the jack.

[0019] According to some embodiments of the present application, the jack is a hydraulic jack configured with a full-automatic hydraulic electric pump, a cushion plate is placed between the hydraulic jack and the test pile, and the full-automatic hydraulic electric pump is placed on the workbench.

[0020] According to some embodiments of the present application, the measuring assembly comprises a reference beam, a reference beam support, and displacement sensors, the bottom of the reference beam support is embedded in the soil layer under the water surface, the reference beam is fixed on the top of the reference beam support and above the test pile, and the displacement sensors are installed on the bottom of the reference beam and face the pile top of the test pile.

[0021] According to some embodiments of the present application, the displacement sensor is a capacitive grating micrometer displacement sensor, and the capacitive grating micrometer displacement sensor is magnetically attracted and fixed on the reference beam.

[0022] According to some embodiments of the present application, the test pile is configured as a pipe pile with an outer diameter of 300-600 mm.

[0023] With the above technical solution, the static load test device for small-diameter pipe piles suitable for fish-light complementary projects can utilize the counterforce assembly with the counterforce pile, the counterforce support, the pressure bearing plate, the lifting hoist, and the counterforce chain to transfer the counterforce, so as to realize the small size and easy splicing of the static load test device, facilitate the operation on the water surface, meet the needs of the small-diameter pipe pile in the single pile vertical compression static load test, and realize the low-cost accurate test based on the modular counterforce structure and the effective counterforce process.

[0024] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0025] The present application will be further described below in conjunction with the drawings and embodiments.

[0026] Figure 1 Structure schematic diagram of some embodiments of the static load test device for small-diameter pipe piles suitable for fish-light complementary projects of the present application.

[0027] Figure 2 Structure schematic diagram of some embodiments of the counterforce support in the static load test device of the present application.

[0028] Figure 3 Structure schematic diagram of some embodiments of the integrated hoop A / integrated hoop B in the static load test device of the present application.

[0029] Meaning of reference signs in the drawings:

[0030] 1-test pile;

[0031] 2-vertical force applying assembly;

[0032] 21-jack; 211-hydraulic jack; 2111-pad plate; 212-full-automatic hydraulic electric pump; 2121-workbench; 2121-1-integrated hoop B; 2121-2-second hollow groove;

[0033] 3-counterforce assembly;

[0034] 31-counterforce pile;

[0035] 32-counterforce frame; 321-first counterforce frame structure; 321-1-first hollow groove; 3211-integrated hoop A; 322-second counterforce frame structure;

[0036] 33-pressure bearing plate;

[0037] 34-lifting hoist; 341-fixed hook; 342-lifting chain;

[0038] 35-counterforce chain;

[0039] 4-measuring assembly;

[0040] 41-reference beam;

[0041] 42-reference beam support;

[0042] 43-displacement sensor. DETAILED DESCRIPTION

[0043] Embodiments of the present application are described in detail below with reference to examples shown in the attached drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0044] A photovoltaic power generation pile foundation detection tool and a detection method in the related art, wherein the detection tool comprises a test pile, a cushion block, a counterweight, a jack, a detector, a counterforce beam, a clamp and a high-strength bolt, the test pile is a cylindrical concrete pile, the cushion block is a cuboid concrete cushion block, the counterweight is a concrete block or an iron block, the jack is a hydraulic jack, the detector is an RS-JYB type static load test system, the counterforce beam comprises an I-beam and a connecting plate, and the clamp comprises a hoop plate, a connecting lug plate, a supporting plate, a reinforcing rib plate and a bolt hole.

[0045] The detection machine is used, and concrete pads are symmetrically placed on the left and right sides of the test pile, the counterforce beam is placed on the pads, counterweights are placed on the left and right sections of the counterforce beam, two clamps are symmetrically arranged on the left and right side walls of the test pile below the counterforce beam and are fastened with high-strength bolts, a jack is arranged between the supporting plate and the counterforce beam, the two jacks are symmetrically arranged on the supporting plates of the two clamps, the detector is arranged on the steel beam, and the jacks are connected to the detector through the sensor. First, the jacks are used to apply a jacking force to the counterforce beam, and at the same time, the clamps are used to apply pressure to the test pile to perform a static load test, and the detector is used to read data.

[0046] It can be seen that the above device still uses stone blocks + cross beams to provide counterforce, so that the device is heavy and cannot adapt to the operation requirements of small and medium-sized devices in fish-light complementary projects and the static load test requirements of small-diameter pipe piles in fish-light complementary projects (must meet water surface operation requirements).

[0047] It can be seen from the above use process that the applicable environment can only be a fish-light complementary project with exposed foundation (i.e., the water in the fish pond has been drained), and the device cannot adapt to water surface operation.

[0048] Therefore, the embodiment of the present application aims to provide a static load test device for small-diameter pipe piles in fish-light complementary projects, which is a lightweight and modular static load test device designed for water surface and small-diameter pipe piles. The counterforce pile, counterforce frame, pressure bearing plate, lifting hoist and counterforce chain are used as the counterforce device, which has small volume, light weight and is easy to splice, and can effectively adapt to the requirements of water surface operation, thereby solving the above problems.

[0049] The static load test device for small-diameter pipe piles in fish-light complementary projects will be described in detail below. Figures 1-3 The static load test device for small-diameter pipe piles in fish-light complementary projects will be described in detail below.

[0050] Please refer to Figure 1 The static load test device for small-diameter pipe piles in fish-light complementary projects provided by the embodiment of the present application comprises a test pile 1, a vertical force applying assembly 2, a counterforce assembly 3 and a measuring assembly 4. The vertical force applying assembly 2 is arranged between the top of the test pile 1 and the counterforce assembly 3, and is used to apply vertical pressure. The counterforce assembly 3 is used to provide counterforce. The measuring assembly 4 is used to measure the settlement.

[0051] Unlike the cylindrical concrete pile of the prior art, the test pile 1 in the embodiment of the present application is configured as a pipe pile with an outer diameter size of 300mm-600mm, which is specially arranged according to the small-diameter pipe pile used in fish-light complementary projects. During construction, the test pile 1 and the counterforce pile 31 can be driven into the soil by a piling boat and stand on the water surface.

[0052] Also refer toFigure 1 The counterforce assembly 3 of the embodiment of the present application can include counterforce piles 31, a counterforce frame 32, a pressure bearing plate 33, a hoisting hoist 34 and a counterforce chain 35; two counterforce piles 31 are symmetrically arranged on both sides of the test pile 1, the counterforce frame 32 is fixedly connected in the middle of the two counterforce piles 31 and above the water surface; the pressure bearing plate 33 is arranged at the end of the vertical force applying assembly 2 away from the test pile 1; on one side of the test pile 1, the fixed hook 341 of the hoisting hoist 34 is fixed to the counterforce frame 32 through the counterforce chain 35, and on the other opposite side of the test pile 1, the hoisting chain 342 of the hoisting hoist 34 is fixedly connected with the counterforce frame 32 through the pressure bearing plate 33.

[0053] In specific implementation, the hoisting hoist 34 can adopt a manual hoist; further, the iron chain of the manual hoist can be used as the hoisting chain 342 to be connected with the counterforce frame 32 through a steel hook; the iron hook of the manual hoist can be used as the fixed hook 341 to be connected with one end of the counterforce chain 35, and the other end of the counterforce chain 35 can be connected with the counterforce frame 32 through a steel hook.

[0054] In specific implementation, the counterforce chain 35 can adopt a steel chain or a steel cable.

[0055] In specific implementation, the pressure bearing plate 33 can adopt a circular pressure bearing steel plate. Further, a guide groove can be arranged at the upper part of the pressure bearing steel plate for the hoisting chain 342 to pass through, and a cover plate can be arranged above the middle part of the guide groove to limit the displacement of the hoisting chain 342, so that the guide groove can finally facilitate the fixed and stable movement of the hoisting chain 342.

[0056] In use, the guide groove of the pressure bearing steel plate is linked with the hoisting hoist 34 in a loading manner, the tension of the counterforce chain 35 is adjusted by the hoisting hoist 34 to ensure that the counterforce chain 35 is vertical, and then the hydraulic jack 211 is used to realize accurate loading, so that the test accuracy can be further improved.

[0057] It should be emphasized that in the present embodiment, the counterforce structure is the pressure bearing plate 33 + the hoisting hoist 34 and the counterforce chain 35 + the counterforce frame 32 + the counterforce pile 31, and in particular, the counterforce pile 31 can be directly provided by the horizontal static load test pile 1 (i.e. three test piles are initially constructed, one in the middle is used as the test pile 1, and the other two on both sides are directly used as the counterforce piles 31), which not only further saves the cost, but also realizes small size, easy splicing and more convenient operation on the water surface, and solves the problem that the existing static load test device cannot be used due to too much pile length exposed on the water surface.

[0058] Continuing to refer to Figure 2In the embodiment of the present application, the counterforce frame 32 can include a first counterforce frame structure 321 and a second counterforce frame structure 322, the inner sides of the two first counterforce frame structures 321 are fixedly connected by the two second counterforce frame structures 322 and collectively surround the outer periphery of the test pile 1; the two ends of each first counterforce frame structure 321 are respectively fixedly connected to the corresponding counterforce pile 31 through an integral hoop A3211, and the first counterforce frame structure 321 is connected to the integral hoop A3211 through a connection end portion a with a first hollow slot 321-1.

[0059] In specific implementation, the counterforce frame 32 with the first hollow slot 321-1 becomes an adjustable counterforce frame 32, which facilitates the adjustment of the bolt mounting positions of the two ends of the first counterforce frame structure 321, for adapting to different pile spacings and pile diameters.

[0060] In specific implementation, the counterforce chain 35 and the hoisting chain 342 of the hoisting hoist 34 can be respectively connected to the two second counterforce frame structures 322.

[0061] In specific implementation, the integral hoop A3211 is installed and fixed on the counterforce pile 31, and the counterforce frame 32 is further fixed on the integral hoop A3211 through bolts. More specifically, the two first counterforce frame structures 321 and the two second counterforce frame structures 322 can be connected through bolts, and the first counterforce frame structure 321 is fixed on the corresponding integral hoop A3211 through bolts.

[0062] Referring to Figure 3 The structure of the integral hoop A3211 can be designed with a steel double-sided protruding screw hole, which is quickly fixed with the counterforce pile 31 to form a rigid connection. The integral hoop A3211 is a whole structure with a central axis, which is fixed on the counterforce pile 31 by rotating around the central axis. Compared with the split structure assembled by two halves in the prior art, the integral hoop A3211 is faster and more stable to install.

[0063] The first counterforce frame structure 321 and the second counterforce frame structure 322 form a modular counterforce frame 32 structure, and further based on the modular counterforce frame 32 structure, the hoisting hoist 34, the counterforce chain 35 and the integral hoop A3211 are connected respectively, which constitutes a counterforce transmission path different from the prior art. The counterforce transmission path can further simplify the structure of the counterforce device and optimize the convenience of water surface operation, and better solve the problems encountered in the vertical compression static load test of small-diameter pipe piles.

[0064] Referring again to Figure 1In the embodiment of the present application, the middle of the two counterforce piles 31 can also be fixedly connected with a workbench 2121, and the workbench 2121 is located above the counterforce frame 32; the two ends of the workbench 2121 are fixedly connected to the corresponding counterforce piles 31 through one integral clamp B2121-1 respectively, and the workbench 2121 is connected with the integral clamp B2121-1 through a connection end part b with a second hollow groove 2121-2.

[0065] In specific implementation, the workbench 2121 can be a detachable square iron stand erected on the counterforce frame 32, and is mainly used for placing various auxiliary tools in the test process, such as an automatic hydraulic electric pump 212. More specifically, the second hollow groove 2121-2 and the integral clamp B2121-1 have the same structure as the first hollow groove 321-1 and the integral clamp A3211, and are connected with the counterforce piles 31 in the same way, and can also be adjusted according to the pile spacing and the pile diameter.

[0066] Also referring to Figure 1 The vertical force applying assembly 2 of the embodiment of the present application can include a jack 21, and the bottom end of the jack 21 is placed on the pile top of the test pile 1, and the pressure plate 33 is placed on the top end of the jack 21.

[0067] In the embodiment of the present application, the jack 21 is preferably a hydraulic jack 211 configured with an automatic hydraulic electric pump 212, and a pad 2111 is preferably placed between the hydraulic jack 211 and the test pile 1, and the automatic hydraulic electric pump 212 can be placed on the workbench 2121.

[0068] In specific implementation, the pad 2111 can be a circular steel plate, the size of which should be consistent with the size of the circular cross section of the counterforce pile 31, and the center of the pad 2111 needs to be on the same vertical line as the center of the test pile 1; further, the circular bottom of the hydraulic jack 211 is smaller than the size of the pad 2111, and the center of the bottom of the hydraulic jack 211 needs to be on the same vertical line as the center of the pad 21113.

[0069] Also referring to Figure 1 The measuring assembly 4 of the embodiment of the present application can include a reference beam 41, a reference beam 41 support and a displacement sensor, the bottom of the reference beam 41 support is placed below the soil layer of the water surface, the reference beam 41 is fixed to the top of the reference beam 41 support and located above the test pile 1, and a plurality of displacement sensors are installed on the bottom of the reference beam 41 and face the pile top of the test pile 1.

[0070] In the embodiment of the present application, the displacement sensor is preferably a capacitive displacement sensor 43, which can be fixed to the reference beam 41 by magnetic attraction. The capacitive displacement sensor 43 is mainly considered in view of the following advantages:

[0071] High precision and high resolution: Capacitive sensors can achieve sub-micron to nanometer level measurement accuracy, with high resolution, suitable for precision measurement requirements.

[0072] Non-contact measurement: No mechanical contact, no wear and tear, long service life, suitable for dynamic measurement.

[0073] Strong anti-interference ability: It has certain resistance to environmental factors such as oil stains and dust, and good stability.

[0074] Simple structure and small size: Light weight, suitable for space-limited application scenarios.

[0075] Fast response speed: Suitable for high-frequency dynamic measurement.

[0076] Low cost: Compared with optical sensors and other devices, capacitive sensors have higher cost performance.

[0077] The static load test device for small-diameter pipe piles suitable for fish-light complementary projects provided by the embodiment of the application can include the following steps in the process of single-pile vertical static load test:

[0078] Three test piles are constructed, one is selected as test pile 1, and the other two are selected as counterforce piles 31.

[0079] Step 1, install counterforce frame 32:

[0080] 1) Determine the diameters of integral hoop B2121-1 and integral hoop A3211, the sizes of second counterforce frame structure 322 and pressure plate 33 according to the pile diameter;

[0081] 2) Adjust the installation position of first counterforce frame structure 321 according to the pile spacing;

[0082] Step 2, install measurement assembly 4

[0083] Install reference beam 41 and reference support 42 above the top of test pile 1;

[0084] Step 3, install vertical force applying assembly 2 and partial counterforce assembly 3

[0085] Hydraulic jack 211 is in place, and lifting sling 34 and counterforce chain 35 are installed in the vertical direction;

[0086] Step 4, install workbench 2121

[0087] Full-automatic electric hydraulic pump is in place, and vertical compression static load test is started;

[0088] Step 5, after the test is completed, remove the static load test device.

[0089] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated thereby must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0090] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0091] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrated; can be mechanically connected, or electrically connected or can communicate with each other; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0092] The above is only the preferred embodiment of the present application, and does not make any form of limitation on the present application, and any simple modification and equivalent change made to the above embodiment according to the technical essence of the present application falls within the protection scope of the present application.

Claims

1. A static load test device for small-diameter pipe piles used in fishlight complementary projects, comprising a test pile, a vertical force applying assembly, a counterforce assembly and a measuring assembly, the vertical force applying assembly being arranged between the top of the test pile and the counterforce assembly, the vertical force applying assembly being used to apply vertical pressure, the counterforce assembly being used to provide counterforce, and the measuring assembly being used to measure settlement; characterized in that the counterforce assembly comprises counterforce piles, a counterforce frame, a pressure bearing plate and a lifting hoist; two counterforce piles are symmetrically arranged on both sides of the test pile, the counterforce frame is fixedly connected to the middle of the two counterforce piles and above the water surface; and the pressure bearing plate is arranged at the end of the vertical force applying assembly away from the test pile. On one side of the test pile, the fixed hook of the lifting hoist is fixed to the counterforce frame through a counterforce chain, and on the other opposite side of the test pile, the lifting chain of the lifting hoist is fixedly connected to the counterforce frame through the pressure bearing plate. The counterforce frame comprises first counterforce frame structures and second counterforce frame structures, the inner sides of two first counterforce frame structures are fixedly connected through two second counterforce frame structures and collectively surround the outer periphery of the test pile. 2.The static load test device for small-diameter pipe piles suitable for fishlight complementary projects according to claim 1, characterized in that, The two ends of each first counterforce frame structure are respectively fixedly connected to the corresponding counterforce pile through an integral clamp A, and the first counterforce frame structure is docked with the integral clamp A through a connection end part a with a first hollow slot. The middle of the two counterforce piles is also fixedly connected with a workbench, and the workbench is above the counterforce frame. 3.The static load test device for small-diameter pipe piles suitable for fishlight complementary projects according to claim 2, characterized in that, The two ends of the workbench are respectively fixedly connected to the corresponding counterforce pile through an integral clamp B, and the workbench is docked with the integral clamp B through a connection end part b with a second hollow slot. The vertical force applying assembly comprises a jack, the bottom end of the jack is placed on the pile top of the test pile, and the pressure bearing plate is placed on the top end of the jack. 4.The static load test device for small-diameter pipe piles suitable for fishlight complementary projects according to claim 3, characterized in that, The jack is a hydraulic jack configured with a full-automatic hydraulic electric pump, a spacer is placed between the hydraulic jack and the test pile, and the full-automatic hydraulic electric pump is placed on the workbench. 5.The static load test device for small-diameter pipe piles suitable for fishlight complementary projects according to claim 4, characterized in that, The measuring assembly comprises a reference beam, a reference beam support and displacement sensors, the bottom of the reference beam support is arranged below the soil layer of the water surface, the reference beam is fixed to the top of the reference beam support and above the test pile, and a plurality of displacement sensors are installed on the bottom of the reference beam and opposite to the pile top of the test pile. 6.The static load test device for small-diameter pipe piles suitable for fishlight complementary projects according to any one of claims 1 to 5, characterized in that, The displacement sensors are capacitive gauge displacement sensors, which are magnetically attracted and fixed to the reference beam. 7.The static load test device for small-diameter pipe piles suitable for fishlight complementary projects according to claim 6, characterized in that, The test pile is configured as a pipe pile with an outer diameter size of 300mm-600mm. 8.The static load test device for small-diameter pipe piles suitable for fishlight complementary projects according to any one of claims 1 to 5, characterized in that, ​

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