A static load test device for small-diameter pipe piles suitable for fish-light complementary projects

Abstract

A kind of static load test device of small diameter pipe pile suitable for fish-light complementary project, including test pile, vertical force exerting component, counterforce component and determination component, vertical force exerting component is set between the top of test pile and counterforce component, vertical force exerting component is used to exert vertical pressure, counterforce component is used to provide counterforce, determination component is used to sink observation quantity;Counterforce component includes counterforce pile, counterforce frame, pressure plate and lifting hoist;Two counterforce piles are symmetrically set on the two sides of test pile, counterforce frame is fixedly connected in the middle of two counterforce piles and is located above water surface;Pressure plate is set at the end of vertical force exerting component away from test pile;On one side of test pile, the fixed hook of lifting hoist is fixed to counterforce frame by counterforce chain, on the other opposite side of test pile, lifting chain of lifting hoist is fixedly connected by passing through pressure plate and counterforce frame.This application not only has the advantages of small volume, light weight and easy to splice, can effectively adapt to the demand of water operation, but also can improve test precision and save cost.

Description

Technical Field

[0001] This invention relates to the field of building structure monitoring technology, and in particular to a static load testing device for small-diameter pipe piles suitable for fishery-solar hybrid projects. Background Technology

[0002] As is widely known, the solar-fishery complementary project is a project that combines floating photovoltaic power generation with fishery, that is, installing solar panels on fish ponds to achieve the dual benefits of power generation and aquaculture.

[0003] The photovoltaic structure of the fishery-solar hybrid project places extremely high demands on the pile foundation structure. To meet stability and safety requirements, it is necessary to conduct pile foundation bearing capacity tests, especially tests on the vertical compressive bearing capacity of individual piles. This test helps ensure that the pile foundation will not settle or deform when bearing the weight of the photovoltaic panels and related equipment.

[0004] In the context of solar-aquaculture complementary projects, small-diameter pipe piles with an outer diameter range of 300mm-600mm are often used as the foundation structure for photovoltaic structures because these small-diameter high-strength prestressed pipe piles have superior performance in terms of bearing capacity and deformation capacity.

[0005] However, because the pile foundation above the water surface in the solar-fishery complementary project is much higher than in other projects, and the pile foundation is erected above the water surface, it is inconvenient to carry out construction with large machinery. As a result, it is impossible to use traditional static load testing devices and methods (such as single pile vertical compressive static load devices based on anchor pile reaction devices, counterweight reaction devices, anchor pile and counterweight combined reaction devices or ground anchor reaction devices) to complete the bearing capacity test of the above-mentioned small diameter pipe piles.

[0006] Currently, the known testing equipment and methods for ultra-high pile foundations in solar-fishery complementary photovoltaic power generation systems can be used to some extent for testing the vertical compressive bearing capacity of single piles in these systems. However, they still have at least the following problems: 1. This testing equipment is only suitable for fishery-solar hybrid projects with exposed foundations, meaning that the fishponds must be drained of water before use. It is not suitable for surface operations. 2. The testing equipment uses stones and crossbeams to provide reaction force, which is essentially still a traditional counterweight reaction device. It is still characterized by its bulky structure. It is not only limited by the environment of water surface photovoltaic operations, which do not allow for the movement of large construction equipment, but also cannot meet the needs of small and medium-sized fishery-solar complementary equipment operations.

[0007] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0008] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes a static load testing device for small-diameter pipe piles suitable for solar-aquaculture complementary projects. This device not only has the advantages of small size, light weight, and easy assembly, effectively adapting to the needs of water operations, but also improves testing accuracy and saves costs.

[0009] According to the present invention, a static load testing device for small-diameter pipe piles suitable for fishery-solar hybrid projects includes a test pile, a vertical force application component, a reaction force component, and a measuring component. The vertical force application component is disposed between the top of the test pile and the reaction force component. The vertical force application component is used to apply vertical pressure, the reaction force component is used to provide reaction force, and the measuring component is used to observe settlement. The reaction assembly includes reaction piles, reaction frame, pressure plate and hoist; two reaction piles are symmetrically arranged on both sides of the test pile, and the reaction frame is fixedly connected in the middle of the two reaction piles and located above the water surface; the pressure plate is set at the end of the vertical force application assembly away from the test pile. On one side of the test pile, the fixed hook of the hoist is fixed to the reaction frame by the reaction chain. On the other side of the test pile, the hoist's lifting chain passes through the pressure plate and is fixedly connected to the reaction frame.

[0010] According to some embodiments of the present invention, the reaction frame includes a first reaction frame structure and a second reaction frame structure, wherein the inner sides of the two first reaction frame structures are fixedly connected by the two second reaction frame structures and together surround the outer perimeter of the test pile; Both ends of each first reaction frame structure are fixedly connected to the corresponding reaction pile by an integrated clamp A, and the first reaction frame structure is connected to the integrated clamp A through the connecting end a with the first hollow groove.

[0011] According to some embodiments of the present invention, a workbench is fixedly connected between the two reaction piles, and the workbench is located above the reaction frame; Both ends of the workbench are fixedly connected to the corresponding reaction piles by an integrated clamp B, and the workbench is connected to the integrated clamp B through the connecting end b with the second hollow groove.

[0012] According to some embodiments of the present invention, the vertical force application assembly includes a jack, the bottom end of which is placed on the top of the test pile, and a bearing plate is placed on the top of the jack.

[0013] According to some embodiments of the present invention, the jack is a hydraulic jack equipped with a fully automatic hydraulic pump, a pad is placed between the hydraulic jack and the test pile, and the fully automatic hydraulic pump is placed on the workbench.

[0014] According to some embodiments of the present invention, the measuring component includes a reference beam, a reference beam support, and motion sensors. The bottom of the reference beam support is driven into the soil layer below the water surface. The reference beam is fixed to the top of the reference beam support and located above the test pile. Several motion sensors are installed at the bottom of the reference beam and directly opposite the top of the test pile.

[0015] According to some embodiments of the present invention, the displacement sensor is a capacitive grating micrometer displacement sensor, which is magnetically fixed to the reference beam.

[0016] According to some embodiments of the present invention, the test piles are configured as pipe piles with an outer diameter of 300mm-600mm.

[0017] With the above technical solution, the present invention provides a static load testing device for small-diameter pipe piles suitable for fishery-solar complementary projects. It can use a reaction component with reaction piles, reaction frames, bearing plates, hoists and reaction chains to transmit reaction forces, thus realizing a compact and easy-to-assemble static load testing device, which is convenient for operation on the water surface. It meets the needs of single-pile vertical compressive static load testing for small-diameter pipe piles. Furthermore, based on the modular reaction structure and effective reaction process, it achieves low-cost and accurate testing.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of some embodiments of the static load testing device for small-diameter pipe piles used in solar-aquaculture complementary projects according to the present invention.

[0021] Figure 2 This is a schematic diagram of the structure of some embodiments of the reaction frame in the static load testing device of the present invention.

[0022] Figure 3 This is a schematic diagram of the structure of some embodiments of the integrated clamp A / integrated clamp B in the static load testing device of the present invention.

[0023] Meaning of the labels in the attached diagram: 1-Test pile; 2-Vertical force application component; 21-Jack; 211-Hydraulic jack; 2111-Plate; 212-Fully automatic hydraulic pump; 2121-Workbench; 2121-1-Integrated clamp B; 2121-2-Second hollow trough; 3-Reaction force component; 31-Reaction pile; 32-Reaction frame; 321-First reaction frame structure; 321-1-First hollow groove; 3211-Integral clamp A; 322-Second reaction frame structure; 33-Pressure plate; 34-Lifting hoist; 341-Fixed hook; 342-Lifting chain; 35 - Reaction chain; 4-Measurement components; 41-Reference beam; 42-Reference beam support; 43 - Displacement sensor. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] A testing device and method for photovoltaic power generation pile foundations are disclosed in the related technology. The testing device includes a test pile, a pad block, a counterweight, a jack, a testing instrument, a reaction beam, clamps, and high-strength bolts. The test pile is a cylindrical concrete pile, the pad block is a rectangular concrete pad block, the counterweight is a concrete block or an iron block, the jack is a hydraulic jack, the testing instrument is an RS-JYB type static load testing system, the reaction beam includes an I-beam and a connecting plate, and the clamps include a clamping plate, a connecting ear plate, a support plate, a reinforcing rib plate, and bolt holes.

[0026] When using this testing equipment, concrete pads are symmetrically placed on the left and right sides of the test pile. The reaction beam is placed on the pads on both sides, and counterweights are placed on the left and right sections of the reaction beam. Two clamps are symmetrically set on the left and right side walls of the test pile below the reaction beam and fastened with high-strength bolts. Jacks are set between the support plate and the reaction beam, and two jacks are symmetrically placed on the support plates of the two clamps. The testing instrument is placed on the steel beam and the jacks and testing instrument are connected to each other through sensors. First, the jacks are used to apply a jacking force to the reaction beam. At the same time, the clamps are used to apply pressure to the test pile to perform a static load test, and the data is read by the testing instrument.

[0027] It is evident that the aforementioned device still uses stones and crossbeams to provide reaction force, making the device bulky and unable to meet the operational needs of small and medium-sized fishery-solar hybrid devices, as well as the static load test requirements of small-diameter pipe piles in fishery-solar hybrid projects (which must meet the requirements for surface operation).

[0028] As can be seen from the above usage process, its applicable environment is only for fishery-solar complementary projects with exposed foundations (i.e., the fish ponds have been drained), and it is even less suitable for water surface operations.

[0029] In view of this, the present invention aims to provide a static load testing device for small-diameter pipe piles suitable for fishery-solar hybrid projects. It is a lightweight and modular static load testing device designed for water surfaces and small-diameter pipe piles. By using reaction piles, reaction frames, bearing plates, hoists and reaction chains as reaction devices, the reaction devices are small in size, light in weight and easy to assemble, which can effectively meet the needs of water operations, thereby solving the above problems.

[0030] The following is based on Figures 1-3 The static load testing device for small-diameter pipe piles applicable to fishery-solar hybrid projects of the present invention is described in detail.

[0031] Please refer to Figure 1 The present invention provides a static load test device for small-diameter pipe piles suitable for fishery-solar complementary projects, including a test pile 1, a vertical force application component 2, a reaction force component 3, and a measuring component 4. The vertical force application component 2 is disposed between the top of the test pile 1 and the reaction force component 3. The vertical force application component 2 is used to apply vertical pressure, the reaction force component 3 is used to provide reaction force, and the measuring component 4 is used to measure settlement.

[0032] Unlike the cylindrical concrete piles of existing technologies, the test pile 1 in this embodiment of the invention is configured as a pipe pile with an outer diameter of 300mm-600mm, which is a special configuration based on the small-diameter pipe piles used in the fishery-solar hybrid project. During construction, both the test pile 1 and the reaction pile 31 can be driven into the soil and erected on the water surface using a piling vessel.

[0033] Also refer to Figure 1 The reaction component 3 of this embodiment may include a reaction pile 31, a reaction frame 32, a pressure plate 33, a hoist 34, and a reaction chain 35. Two reaction piles 31 are symmetrically arranged on both sides of the test pile 1, and the reaction frame 32 is fixedly connected to the middle of the two reaction piles 31 and located above the water surface. The pressure plate 33 is arranged at the end of the vertical force application component 2 away from the test pile 1. On one side of the test pile 1, the fixed hook 341 of the hoist 34 is fixed to the reaction frame 32 through the reaction chain 35. On the other opposite side of the test pile 1, the lifting chain 342 of the hoist 34 passes through the pressure plate 33 and is fixedly connected to the reaction frame 32.

[0034] In practice, the hoist 34 can be a manual hoist; furthermore, the iron chain on the manual hoist serves as the lifting chain 342, which passes through the pressure-bearing steel plate and can be connected to the reaction frame 32 via a steel hook; the iron hook on the manual hoist serves as the fixed hook 341, which is connected to one end of the reaction chain 35, and the other end of the reaction chain 35 can be connected to the reaction frame 32 via a steel hook.

[0035] In practice, the reaction chain 35 can be a steel chain or a steel cable.

[0036] In specific implementation, the pressure plate 33 can be a circular pressure-bearing steel plate. Furthermore, a guide groove can be provided on the upper part of the pressure-bearing steel plate for the lifting chain 342 to pass through, and a cover plate is provided in the middle part above the guide groove to restrict the displacement of the lifting chain 342. Finally, the guide groove can be used to make the direction of the lifting chain 342 fixed and stable.

[0037] In use, the guide groove of the pressure-bearing steel plate is linked with the hoist 34 for loading. The tension of the reaction chain 35 is adjusted by the hoist 34 to ensure that the reaction chain 35 is vertical. Combined with the hydraulic jack 211, precise loading is achieved, which can further improve the test accuracy.

[0038] It should be emphasized that in this embodiment, the reaction structure consists of a bearing plate 33, a hoist 34, a reaction chain 35, a reaction frame 32, and a reaction pile 31. In particular, the reaction pile 31 can be directly used as the horizontal static load test pile 1 (i.e., three test piles were initially constructed, with the middle one used as test pile 1 and the two on both sides directly used as reaction piles 31). This not only further saves costs but also achieves a compact size, easy assembly, and more convenient operation on the water surface. It solves the problem that the pile length is too long above the water surface, making it difficult to use existing static load test devices.

[0039] Continue to refer to Figure 2 In this embodiment of the invention, the reaction frame 32 may include a first reaction frame structure 321 and a second reaction frame structure 322. The inner sides of the two first reaction frame structures 321 are fixedly connected by the two second reaction frame structures 322 and are together arranged around the outer periphery of the test pile 1. Both ends of each first reaction frame structure 321 are fixedly connected to the corresponding reaction pile 31 by an integral clamp A3211, and the first reaction frame structure 321 is connected to the integral clamp A3211 through the connecting end a with a first hollow groove 321-1.

[0040] In specific implementation, the reaction frame 32 with the first hollow groove 321-1 becomes an adjustable reaction frame 32, which facilitates the adjustment of the bolt installation positions at both ends of the first reaction frame structure 321 to adapt to different pile spacing and pile diameter.

[0041] In practice, the reaction chain 35 and the lifting chain 342 of the hoist 34 can be connected to two second reaction frame structures 322 respectively.

[0042] In practice, the integrated clamp A3211 is installed and fixed on the reaction pile 31, and the reaction frame 32 is then fixed to the integrated clamp A3211 with bolts. More specifically, two first reaction frame structures 321 and two second reaction frame structures 322 can be connected by bolts, and the first reaction frame structure 321 is fixed to the corresponding integrated clamp A3211 with bolts.

[0043] Reference Figure 3 The integrated clamp A3211 can be constructed with a steel double-sided protruding screw hole design, which can be quickly fixed to the reaction pile 31 to form a rigid connection. The integrated clamp A3211 is an integral structure with a central axis, which is fixed to the reaction pile 31 by rotating around the central axis. Compared with the existing split structure assembled from two halves, the installation is faster and more stable.

[0044] The first reaction frame structure 321 and the second reaction frame structure 322 form a modular reaction frame 32 structure. Based on this modular reaction frame 32 structure, the hoist 34, the reaction chain 35 and the integrated clamp A3211 are respectively connected, forming a reaction force transmission path that is different from the technical technology. This can further simplify the structure of the reaction device and optimize the convenience of water surface operation, and better solve the problems encountered by small diameter pipe piles in the vertical compressive static load test of single piles.

[0045] Refer to Figure 1 In this embodiment of the invention, a workbench 2121 can be fixedly connected between the two reaction piles 31, and the workbench 2121 is located above the reaction frame 32; both ends of the workbench 2121 are fixedly connected to the corresponding reaction piles 31 through an integrated clamp B2121-1, and the workbench 2121 is connected to the integrated clamp B2121-1 through the connecting end b with the second hollow groove 2121-2.

[0046] In practice, the workbench 2121 can be a detachable square iron frame erected on the reaction frame 32, mainly used to place various auxiliary tools during the testing process, such as the fully automatic hydraulic pump 212. More specifically, the second hollow trough 2121-2 and the integrated clamp B2121-1 have the same structure as the first hollow trough 321-1 and the integrated clamp A3211, and are connected to the reaction pile 31 in the same way. They can also be adjusted according to the pile spacing and pile diameter.

[0047] Also refer to Figure 1 The vertical force application component 2 of this embodiment may include a jack 21, the bottom end of which is placed on the top of the test pile 1, and the bearing plate 33 is placed on the top of the jack 21.

[0048] In this embodiment of the invention, the jack 21 is preferably a hydraulic jack 211 equipped with a fully automatic hydraulic pump 212. It is best to place a pad 2111 between the hydraulic jack 211 and the test pile 1. The fully automatic hydraulic pump 212 can be placed on the workbench 2121.

[0049] In specific implementation, the pad 2111 can be a circular steel plate, the size of which should be consistent with the circular cross-section of the reaction pile 31, and the center of the pad 2111 should be on the same vertical line as the center of the test pile 1; furthermore, the circular bottom of the hydraulic jack 211 should be smaller than the size of the pad 2111, and the bottom center of the hydraulic jack 211 should be on the same vertical line as the center of the pad 2111.

[0050] Also refer to Figure 1 The measuring component 4 of this embodiment may include a reference beam 41, a reference beam support 42 and displacement sensors. The bottom of the reference beam support 42 is driven into the soil layer below the water surface. The reference beam 41 is fixed to the top of the reference beam support 42 and is located above the test pile 1. Several displacement sensors are installed at the bottom of the reference beam 41 and are directly opposite the top of the test pile 1.

[0051] In this embodiment of the invention, the displacement sensor is preferably a capacitive grating micrometer displacement sensor 43, which can be magnetically fixed to the reference beam 41. The selection of the capacitive grating micrometer displacement sensor 43 is mainly based on the following advantages: High precision and high resolution: Capacitive grating sensors can achieve measurement accuracy from submicron to nanometer level, with high resolution, making them suitable for precision measurement needs.

[0052] Non-contact measurement: No mechanical contact, no wear, no friction, long service life, suitable for dynamic measurement.

[0053] Strong anti-interference ability: It has a certain resistance to environmental factors such as oil and dust, and has good stability.

[0054] Simple structure and small size: lightweight, suitable for space-constrained applications.

[0055] Fast response speed: suitable for high-frequency dynamic measurement.

[0056] Low cost: Compared to devices such as optical sensors, capacitive grating sensors offer better cost performance.

[0057] The process of conducting a single-pile vertical static load test using a static load testing device for small-diameter pipe piles suitable for solar-fishery complementary projects, provided by an embodiment of the present invention, may include the following steps: Three test piles were constructed, one of which was selected as test pile 1, and the other two were selected as reaction piles 31.

[0058] Step 1: Install reaction frame 32: 1) Determine the diameters of integrated clamp B2121-1 and integrated clamp A3211, as well as the dimensions of the second reaction frame structure 322 and the bearing plate 33, based on the pile diameter; 2) Adjust the installation position of the first reaction frame structure 321 according to the pile spacing; Step 2, Install measuring component 4 Install the reference beam 41 and the reference beam support 42 above the top of the test pile 1; Step 3, install vertical force application component 2 and partial reaction component 3. Hydraulic jack 211 is in place, and hoist 34 and reaction chain 35 are installed in the vertical direction; Step 4, Install workbench 2121 The fully automatic electric hydraulic pump was positioned and started to conduct a vertical static load test. Step 5: After the test is completed, remove the static load test device.

[0059] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0061] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0062] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any simple modifications and equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A static load testing device for small-diameter pipe piles suitable for solar-fishery complementary projects, comprising a test pile, a vertical force application component, a reaction force component, and a measuring component, wherein the vertical force application component is disposed between the top of the test pile and the reaction force component, the vertical force application component is used to apply vertical pressure, the reaction force component is used to provide reaction force, and the measuring component is used to observe settlement; characterized in that, The reaction force assembly includes a reaction pile, a reaction frame, a pressure plate, and a hoist; two reaction piles are symmetrically arranged on both sides of the test pile, and the reaction frame is fixedly connected to the middle of the two reaction piles and located above the water surface; the pressure plate is located at the end of the vertical force application assembly opposite to the test pile. On one side of the test pile, the fixed hook of the hoist is fixed to the reaction frame by a reaction chain; on the other opposite side of the test pile, the lifting chain of the hoist passes through the pressure plate and is fixedly connected to the reaction frame. The reaction frame includes a first reaction frame structure and a second reaction frame structure. The inner sides of the two first reaction frame structures are fixedly connected by the two second reaction frame structures and together surround the outer perimeter of the test pile. Both ends of each of the first reaction frame structures are fixedly connected to the corresponding reaction piles by an integrated clamp A, and the first reaction frame structure is connected to the integrated clamp A through a connecting end a with a first hollow groove. The measuring assembly includes a reference beam, a reference beam support, and motion sensors. The bottom of the reference beam support is driven into the soil layer below the water surface. The reference beam is fixed to the top of the reference beam support and is located above the test pile. Several motion sensors are installed at the bottom of the reference beam and face the top of the test pile.

2. The static load testing device for small-diameter pipe piles suitable for solar-aquaculture complementary projects according to claim 1, characterized in that, A workbench is fixedly connected between the two reaction piles, and the workbench is located above the reaction frame; Both ends of the workbench are fixedly connected to the corresponding reaction piles by an integrated clamp B, and the workbench is connected to the integrated clamp B through a connecting end b with a second hollow groove.

3. The static load testing device for small-diameter pipe piles suitable for solar-fishery complementary projects according to claim 2, characterized in that, The vertical force application assembly includes a jack, the bottom end of which is placed on the top of the test pile, and the bearing plate is placed on the top of the jack.

4. The static load testing device for small-diameter pipe piles suitable for solar-aquaculture complementary projects according to claim 3, characterized in that, The jack is a hydraulic jack equipped with a fully automatic hydraulic pump. A pad is placed between the hydraulic jack and the test pile, and the fully automatic hydraulic pump is placed on the workbench.

5. A static load testing device for small-diameter pipe piles suitable for solar-aquaculture complementary projects according to any one of claims 1 to 4, characterized in that, The displacement sensor is a capacitive grating micrometer displacement sensor, which is magnetically fixed to the reference beam.

6. A static load testing device for small-diameter pipe piles suitable for solar-aquaculture complementary projects according to any one of claims 1 to 4, characterized in that, The test piles were configured as pipe piles with an outer diameter of 300mm-600mm.

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