Green light type cross-shaped quick-assembly static load reaction frame test device

Abstract

This application provides a green, lightweight, cross-shaped, quick-assembly static load reaction frame testing device, including a reaction frame, jacks, anchor pile assemblies, and a recovery clamp. The reaction frame has a cross-shaped structure, with a connecting end on the bottom center, and vertically extending first cables at each of the four ends. The jack is installed at the bottom of the connecting end, with its bottom resting on the foundation. The anchor pile assembly includes four buried anchor piles, each with a connector at its top, which connects to the bottom end of the first cable. The recovery clamp is used to lift the buried anchor piles upwards. The green, lightweight, cross-shaped, quick-assembly static load reaction frame testing device provided by this application offers a more stable counterforce for the jacks due to the cross-shaped structure of the reaction frame. The buried anchor piles, combined with the recovery clamp, enable recycling and reuse, reducing steel waste and underground obstacle problems. The overall structure eliminates the need for numerous counterweights, further reducing construction costs.

Description

Technical Field

[0001] This application belongs to the field of geotechnical engineering technology, specifically relating to a green, lightweight, cross-shaped, quick-assembly static load reaction frame test device. Background Technology

[0002] Vertical compressive static load testing is the most direct and reliable traditional method for evaluating the bearing capacity of foundations, and it is widely used in the field of engineering construction. The reaction frame, as the core equipment of this test, plays a crucial role in providing a stable and sufficient reverse force to the hydraulic jacks, ensuring that the load is applied accurately and controllably to the object under test.

[0003] Currently, the mainstream reaction frames used in engineering practice are mainly divided into two types: surcharge type and anchor pile type. However, surcharge type reaction frames require a large number of counterweights, resulting in a large workload for transportation, hoisting, and stacking operations, low construction efficiency, and stringent requirements on the bearing capacity of the test site, while also posing significant safety hazards. Although anchor pile type reaction frames do not require surcharges and provide reaction force by driving permanent concrete anchor piles into the ground, these anchor piles are often directly abandoned underground after the test, which not only wastes resources but also creates underground obstacles, violating the concept of green construction. In addition, the main beams and connecting structures of traditional reaction frames are generally quite heavy, and the assembly process is time-consuming and labor-intensive. Summary of the Invention

[0004] This application provides a green, lightweight, cross-shaped, quick-assembly static load reaction frame testing device, which aims to solve the technical problems of existing reaction frames, such as large workload, time and labor costs, and permanent waste caused by anchor pile reaction frames. Both types of reaction frames have defects.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] A green, lightweight, cross-shaped, quick-assembly static load reaction frame testing device is provided, comprising:

[0007] The reaction frame has a cross-shaped structure, with a connecting end on the bottom surface of the middle part of the reaction frame, and a first vertically extending cable at each of the four ends of the reaction frame;

[0008] A jack, with its top installed at the bottom of the docking end, the bottom of which is located on the foundation.

[0009] An anchor assembly includes four buried anchors, each anchor having a connector at its top that connects to the bottom end of a corresponding first cable; and

[0010] A retrieval clamp is used to connect with the connector to lift the buried anchor pile upwards.

[0011] In one possible implementation, the reaction frame includes:

[0012] A first crossbeam has a connecting plate in the middle, the surface of which is perpendicular to the side of the first crossbeam, and the bottom of the first crossbeam forms the mating end; and

[0013] Two second crossbeams are symmetrically arranged on both sides of the first crossbeam. The length direction of the second crossbeams is perpendicular to the length direction of the first crossbeam. The inner end of the second crossbeam is provided with a connecting plate corresponding to the connecting plate. The connecting plate and the connecting plate are connected by fasteners. The two second crossbeams cooperate with the first crossbeam to form the cross-shaped structure. The ends of the first crossbeam and the two second crossbeams are respectively provided with the first cable.

[0014] In one possible implementation, the reaction frame further includes:

[0015] A central column is installed on the upper surface of the middle part of the first crossbeam, and a force transmission block is provided at the top of the central column;

[0016] Multiple diagonal braces, each connected at both ends to the central column and either the first or second crossbeam; and

[0017] Multiple second cables are radially distributed around the axis of the central column. One end of each second cable is connected to the force transmission block, and the other end is connected to the outer end of the first or second crossbeam, so that the first or second crossbeam, the central column, and the second cables form a triangular structure.

[0018] In one possible implementation, the bottom surface of the first crossbeam gradually slopes downward from both ends toward the middle;

[0019] The bottom surface of the second crossbeam gradually slopes towards the inner end of the second crossbeam from top to bottom.

[0020] In one possible implementation, the bottom of the jack abuts against a pad.

[0021] In one possible implementation, the sum of the thicknesses of the connecting plate and the mating plate is equal to the thickness of the second crossbeam.

[0022] In one possible implementation, one side of the docking plate is connected to the connecting plate, and a reinforcing plate is provided between the other side of the docking plate and the side of the first crossbeam.

[0023] In one possible implementation, the ends of the first crossbeam and the second crossbeam are respectively provided with a plurality of connecting holes at intervals, the connecting holes being vertically connected, and the first cable selectively passing through one of the plurality of connecting holes.

[0024] In one possible implementation, the first cable is a screw rod, and a first threaded sleeve is fitted around its outer periphery. The threaded sleeve abuts against the top of the first crossbeam or the second crossbeam, and the threaded sleeve is screwed to the first cable.

[0025] The buried anchor pile has a receiving space, and the connector has a limiting hole communicating with the receiving space; the lower end of the first cable is fitted with a second threaded sleeve, the second threaded sleeve is located in the receiving space, and the top of the second threaded sleeve abuts against the bottom end of the limiting hole.

[0026] In one possible implementation, the plurality of second cables are divided into four groups, each group including two second cables, with the bottom ends of the two second cables in the same group respectively located on both sides of the end of the first crossbeam or the second crossbeam.

[0027] The green, lightweight, cross-shaped, quick-assembly static load reaction frame testing device provided in this application, compared with existing technologies, constructs a stable upper force-bearing structure through a cross-shaped reaction frame. The reaction frame is rigidly connected to buried anchor piles using first cables at its four ends. A jack is installed at the central joint of the reaction frame. When a load is applied to the foundation, the reaction frame transmits the reaction force to the buried anchor piles through the first cables. The test load is balanced by the frictional resistance and end resistance between the anchor piles and the soil, achieving precise and controllable load application. The cross-shaped structure of the reaction frame provides more uniform stress and greater stability than the traditional straight main beam, providing a more stable reaction force for the jacks. The buried anchor piles, combined with a recovery clamp, enable recycling and reuse, reducing resource waste and underground obstacle problems. The four first cables at the ends of the reaction frame and the anchor piles form a multi-point force-bearing system with a clear load transfer path, ensuring precise and controllable load application and improving the reliability of test data. The overall structure does not require a large number of counterweights, reducing the requirements for site bearing capacity, and is suitable for test scenarios with various geological conditions. The lightweight structural design facilitates transportation and hoisting, further reducing construction costs. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A schematic diagram of the structure of the green, lightweight, cross-shaped, quick-assembly static load reaction frame test device provided in the embodiments of this application;

[0030] Figure 2 This is a schematic diagram of the assembly of the first cable, the first crossbeam, and the anchor pile assembly used in the embodiments of this application;

[0031] Figure 3 This is an assembly diagram of the first and second crossbeams used in the embodiments of this application;

[0032] Figure 4 This is a top view of the first crossbeam used in the embodiments of this application;

[0033] Figure 5 This is a top view of the second crossbeam used in the embodiments of this application;

[0034] Figure 6 This is a front view of the second crossbeam used in the embodiments of this application;

[0035] Figure 7 This is an exploded view of the assembly of the buried anchor piles and connectors used in the embodiments of this application;

[0036] Figure 8 This is a side view of the retrieval gripper used in the embodiments of this application;

[0037] Figure 9 This is a front view of the retrieval gripper used in the embodiments of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Reaction frame; 11. First cable; 111. First threaded sleeve; 112. Second threaded sleeve; 12. First crossbeam; 121. Connecting plate; 13. Second crossbeam; 14. Fastener; 15. Central column; 151. Force transmission block; 16. Diagonal brace; 17. Second cable;

[0040] 2. Jack; 21. Pad;

[0041] 3. Anchor pile assembly; 31. Buried anchor pile; 32. Connector;

[0042] 4. Recycling clamp; 41. Main board; 411. Rotating hole; 42. Screw head. Detailed Implementation

[0043] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is actually illustrative only and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0045] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0046] It should be noted that the terms "length," "width," "height," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0047] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0048] 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 one or more of that feature. Additionally, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0049] Please refer to the following: Figures 1 to 9 The green, lightweight, cross-shaped, quick-assembly static load reaction frame testing device provided in this application is described below. The green, lightweight, cross-shaped, quick-assembly static load reaction frame testing device includes a reaction frame 1, jacks 2, anchor pile assemblies 3, and a retrieval clamp 4. The reaction frame 1 has a cross-shaped structure, with a connecting end on the bottom surface of the middle section. Each of the four ends of the reaction frame 1 has a vertically extending first cable 11. The top of the jack 2 is installed at the bottom of the connecting end, and the bottom of the jack 2 is located on the foundation. The anchor pile assembly 3 includes four buried anchor piles 31, each with a connector 32 at its top, which connects to the bottom end of the corresponding first cable 11. The retrieval clamp 4 is used to connect to the connector 32 to lift the buried anchor piles 31 upwards.

[0050] It should be noted that the buried anchor pile 31 is pre-driven and rotated into the soil surrounding the test pile via mechanical means. During the test, the jack 2 applies pressure to the test pile in the foundation, and the reaction force is transmitted to the first cable 11 through the reaction frame 1, ultimately balanced by the friction between the buried anchor pile 31 and the soil. After the test, the load is removed and the connection is loosened. The recovery clamp 4 is used to grip the connector 32 at the top of the buried anchor pile 31, and the buried anchor pile 31 is gradually rotated out of the ground. After cleaning and maintenance, it can be put into use again.

[0051] In practice, jack 2 is equipped with a synchronous loading control system to remotely control the extension and retraction of jack 2.

[0052] It should be noted that the buried anchor pile 31 is a spiral steel pipe anchor pile.

[0053] In practical implementation, this device constructs a stable upper force-bearing structure through a cross-shaped reaction frame 1. The first cable 11 at each of the four ends forms a rigid connection between the reaction frame 1 and the buried anchor pile 31. The jack 2 is installed at the middle docking end of the reaction frame 1. When a load is applied to the foundation, the reaction frame 1 transmits the reverse force to the buried anchor pile 31 through the first cable 11. The test load is balanced by the frictional resistance and end resistance between the anchor pile and the soil, so as to achieve precise and controllable application of the load. After the test, the buried anchor pile 31 is lifted and retrieved by connecting the retrieval clamp 4 to the top connector 32 of the anchor pile, thus completing the disassembly and resource recovery of the device.

[0054] The green, lightweight, cross-shaped, quick-assembly static load reaction frame test device provided in this embodiment, compared with existing technologies, features a cross-shaped reaction frame 1 that provides more uniform stress and stronger stability than the traditional straight main beam, and can provide a more stable reverse force for the jack 2. The buried anchor piles 31, in conjunction with the recovery clamp 4, enable recycling and reuse, reducing resource waste and underground obstacle problems. The four first cables 11 located at the ends of the reaction frame 1 form a multi-point force system with the anchor piles, providing a clear load transfer path, ensuring precise and controllable load application, and improving the reliability of test data. The overall structure requires no large number of counterweights, reducing the requirements for site bearing capacity, adapting to various geological conditions in test scenarios, and the lightweight structural design facilitates transportation and hoisting, further reducing construction costs.

[0055] In some embodiments, see Figure 1 and Figure 3 The reaction frame 1 includes a first crossbeam 12 and two second crossbeams 13. The first crossbeam 12 has a connecting plate 121 in the middle, the surface of the connecting plate 121 is perpendicular to the side of the first crossbeam 12, and the bottom of the first crossbeam 12 forms a butt joint. The two second crossbeams 13 are symmetrically arranged on both sides of the first crossbeam 12. The length direction of the second crossbeams 13 is perpendicular to the length direction of the first crossbeam 12. The inner end of the second crossbeams 13 is provided with a butt joint plate corresponding to the connecting plate 121. The butt joint plate and the connecting plate 121 are connected by fasteners 14. The two second crossbeams 13 and the first crossbeam 12 cooperate to form a cross-shaped structure. The ends of the first crossbeam 12 and the two second crossbeams 13 are respectively provided with first cables 11.

[0056] In practice, the fastener 14 is a fastening bolt, which passes through both the connecting plate 121 and the mating plate, so that the mating plate and the connecting plate 121 are connected as a whole.

[0057] In practice, the disassembled first crossbeam 12 and second crossbeam 13 can be transported separately, reducing transportation costs and handling difficulties, and is especially suitable for construction scenarios with narrow sites or limited transportation routes.

[0058] In this embodiment, the reaction frame 1 is divided into a first crossbeam 12 and two symmetrically arranged second crossbeams 13. This modular design solves the problems of the traditional integral reaction frame 1 being bulky and difficult to transport. The docking plate and connecting plate 121 are connected by fasteners 14, which is simple and quick to operate, eliminating the need for complex splicing processes, significantly shortening assembly time, and improving construction efficiency. At the same time, the fasteners 14 ensure the rigidity and stability of the connection, preventing loosening or displacement during the test. The two second crossbeams 13 are symmetrically arranged on both sides of the first crossbeam 12, forming a standard cross-shaped force-bearing structure, making the reaction frame 1 uniformly and symmetrically stressed, and ensuring balanced load transfer, thus ensuring stable output of the reaction force during the test. The design of the connecting plate 121 and the docking plate makes the stress at the crossbeam connection more reasonable, avoiding local stress concentration, extending the service life of the device. The modular structure facilitates later maintenance and component replacement; if a single crossbeam is damaged, there is no need to replace the entire frame, reducing maintenance costs. The modular design also reduces storage space and makes reuse more convenient.

[0059] In some embodiments, see Figure 1 The reaction frame 1 also includes a central column 15, multiple diagonal braces 16, and multiple second cables 17. The central column 15 is installed on the upper surface of the middle part of the first crossbeam 12, and a force transmission block 151 is provided at the top of the central column 15; the two ends of the multiple diagonal braces 16 are respectively connected to the central column 15 and the first crossbeam 12 or the second crossbeam 13; the multiple second cables 17 are radially distributed with the axis of the central column 15 as the center, one end of the second cable 17 is connected to the force transmission block 151, and the other end is connected to the outer end of the first crossbeam 12 or the second crossbeam 13, so that the first crossbeam 12 or the second crossbeam 13, the central column 15, and the second cables 17 form a triangular structure.

[0060] The triangular structure in this embodiment exhibits high stability. The radially distributed second cables 17, together with the crossbeam and central column 15, form multiple stable triangular force-bearing units, significantly enhancing the anti-overturning and anti-deformation capabilities of the reaction frame 1. The central column 15 and force transmission block 151 make the connection of the second cables 17 more robust and the load transfer path clearer. The force at the end of the crossbeam is concentrated and transferred to the central column 15 through the second cables 17, and then distributed to the middle of the first crossbeam 12, making the entire reaction frame 1 more evenly stressed, avoiding structural damage caused by local stress concentration, and extending the service life of the device. The diagonal brace 16 connects the central column 15 and the crossbeam, further dispersing the bending stress of the crossbeam, reducing the deformation of the crossbeam, ensuring the structural integrity of the reaction frame 1 during the test, and guaranteeing the accuracy of the test data. The central column 15, diagonal brace 16, and second cables 17 are all designed with lightweight construction, which does not affect transportation and assembly efficiency.

[0061] In some embodiments, see Figures 4 to 6The bottom surface of the first crossbeam 12 gradually slopes downwards from both ends towards the middle; the bottom surface of the second crossbeam 13 gradually slopes downwards towards the inner end of the second crossbeam 13. This inclined structure brings the center of force of the crossbeam closer to the central connection end, optimizing the load transfer path and allowing the pressure applied by the jack 2 to be transferred more directly and efficiently to the first cables 11 at the four ends, thus improving load transfer efficiency. The downward slope of the bottom surfaces of the first crossbeam 12 towards the middle creates an arch-like stress distribution, enhancing the crossbeam's bending resistance, reducing deformation, and ensuring the structural stability of the reaction frame 1 during the test. The downward slope of the bottom surface of the second crossbeam 13 towards the inner end, matching the stress characteristics of the cross-shaped structure, allows the force at the ends of the second crossbeam 13 to be transferred more smoothly to the central connecting plate 121, avoiding local deformation caused by excessive stress at the ends and further ensuring the overall structural stress balance.

[0062] In practical implementation, the inclined design of the first crossbeam 12 and the second crossbeam 13 optimizes the stress distribution while reducing the amount of material used in the middle of the crossbeams, achieving a lightweight design for the reaction frame 1 and reducing transportation and hoisting costs. The inclined bottom structure reduces interference between the bottom of the first crossbeam 12 and the second crossbeam 13 and the ground or other components, facilitating the installation and commissioning of the jack 2 and other components, and improving construction convenience.

[0063] In some embodiments, see Figure 1 The bottom of the jack 2 is abutted against a pad 21. The pad 21 ensures that the load applied by the jack 2 is evenly distributed on the foundation, guaranteeing the uniformity and precision of load transfer, and improving the reliability and accuracy of the test results. For test sites with poor flatness, the pad 21 can compensate for site defects through its own flatness, making the jack 2 more stable and preventing the jack 2 from shifting or tilting during the test, thus reducing safety hazards and improving the safety of the test process. The pad 21 has a simple structure and strong versatility, and can be reused in different test scenarios without needing to be replaced or reprocessed for each test, reducing test costs.

[0064] In some embodiments, the sum of the thicknesses of the connecting plate 121 and the docking plate is equal to the thickness of the second crossbeam 13. The load-bearing surface of the reaction frame 1 remains flat, preventing localized stress concentration due to uneven thickness during load transfer, thus ensuring the overall structural stress balance. Consistent thickness ensures that the stiffness of the connection points is synchronized with the main body of the crossbeam, resulting in stronger structural integrity and more stable load-bearing capacity for the entire reaction frame 1. This effectively copes with dynamic loads during testing, preventing the connection points from becoming weak points and extending the service life of the device. The dimensions of the connecting plate 121 and the docking plate can be standardized for production, eliminating the need for complex fitting processes, reducing manufacturing costs, and improving production efficiency.

[0065] In some embodiments, one side of the mating plate is connected to the connecting plate 121, and a reinforcing plate is provided between the other side and the side of the first crossbeam 12. The reinforcing plate can effectively disperse the stress at the connection point, transfer part of the load borne by the mating plate to the side of the first crossbeam 12, avoid local stress concentration at the connection between the mating plate and the connecting plate 121, extend the service life of the connection point, and ensure that the device can maintain stable connection performance after repeated use.

[0066] In some embodiments, see Figure 1 The first crossbeam 12 and the second crossbeam 13 are each provided with multiple connecting holes at intervals. These connecting holes are vertically connected, and the first cable 11 passes through one of these holes. The device can select appropriate connecting holes for cable fixing according to the needs of the actual test scenario, significantly improving its adaptability and versatility. The flexible and adjustable connection positions allow for more uniform tensile force distribution on each buried anchor pile 31. By adjusting the cable connection points, the stress state of different anchor piles can be balanced, avoiding local overload caused by uneven stress, thus improving the overall stability and load-bearing reliability of the reaction frame 1. The vertically connected design facilitates the installation and disassembly of the first cable 11, eliminating the need for complex positioning and docking procedures, shortening assembly and disassembly time, and improving construction efficiency. The connecting holes make the cable connection more stable, avoiding stress deviation caused by cable displacement, ensuring the accuracy of load transfer during the test, improving the reliability of test data, and further expanding the application scope of the device in the field of geotechnical engineering testing.

[0067] In some embodiments, see Figure 1 and Figure 2 The first cable 11 is a screw rod, and a first threaded sleeve 111 is fitted on its outer periphery. The threaded sleeve abuts against the top of the first crossbeam 12 or the second crossbeam 13, and the threaded sleeve is screwed to the first cable 11. The buried anchor pile 31 has a receiving space, and the connector 32 has a limiting hole communicating with the receiving space. The lower end of the first cable 11 is fitted with a second threaded sleeve 112, which is located in the receiving space. The top of the second threaded sleeve 112 abuts against the bottom end of the limiting hole.

[0068] This embodiment employs a screw-type first cable 11 connected with a first threaded sleeve 111 and a second threaded sleeve 112, enabling adjustment of the tension between the reaction frame 1 and the buried anchor pile 31. Rotating the first threaded sleeve 111 allows for fine-tuning of the tension of the first cable 11, ensuring a tightly fitted overall force system between the upper reaction system and the lower anchoring system, thus improving the accuracy of load transfer. The first threaded sleeve 111 abuts against the top of the first crossbeam 12 or the second crossbeam 13, and the second threaded sleeve 112 abuts against the bottom of the limiting hole, effectively fixing the position of the first cable 11 and preventing loosening or displacement of the first cable 11 due to vibration or load fluctuations during the test. This ensures the stability and safety of the test process and reduces errors in the test data. The screw connection between the screw and the threaded sleeve is easy to disassemble, requiring no special tools; simply rotating the threaded sleeve completes the connection and disassembly, shortening the construction cycle and improving construction efficiency. The design of the accommodating space and limiting hole effectively protects the lower connection part of the first cable 11, preventing soil impurities and moisture from entering the connection part and causing corrosion or wear, thus extending the service life of the cable and anchor pile.

[0069] In some embodiments, see Figure 1 The multiple second cables 17 are divided into four groups, each group including two second cables 17. The bottom ends of the two second cables 17 in the same group are respectively located on both sides of the end of the first crossbeam 12 or the second crossbeam 13.

[0070] In practice, the four ends of the reaction frame 1 can be constrained by forces on both sides, which solves the problem of uneven force distribution and easy torsion at the ends of the crossbeam caused by the traditional single cable connection on one side. This ensures that the force distribution at each end of the crossbeam is balanced and symmetrical, and improves the overall stability and torsional resistance of the reaction frame 1.

[0071] In this embodiment, two second cables 17 of the same group are respectively located on both sides of the end of the crossbeam, forming a bidirectional limiting effect on the end of the first crossbeam 12 or the second crossbeam 13. This provides high safety redundancy and ensures structural stability even under heavy loads or complex geological conditions, reducing safety hazards during testing. The four groups of second cables 17, in conjunction with the central column 15, improve the force-bearing system of the reaction frame 1. The force at the end of the crossbeam is evenly transferred to the central column 15 through the two second cables 17 on both sides, and then distributed throughout the entire reaction frame 1, avoiding localized stress concentration and extending the service life of the device. The tension of the second cables 17 can be more efficiently converted into the supporting force of the reaction frame 1, improving the load-bearing capacity of the device and expanding its applicable load range.

[0072] In some embodiments, see Figures 7 to 9The retrieval clamp 4 includes a main board 41, a screw head 42, and a rotating rod. The top of the main board 41 has a rotating hole 411 extending along its own thickness. The rotating rod passes through the rotating hole 411, facilitating rotation by an employee. The top of the buried anchor pile 31 has a connecting threaded groove. The connector 32 has a threaded protrusion corresponding to the connecting threaded groove. The threaded protrusion and the connecting threaded groove are threadedly engaged, allowing the connector 32 to be installed on top of the buried anchor pile 31. When the buried anchor pile 31 needs to be retrieved, the connector 32 is removed, and the screw head 42 is screwed into the connecting threaded groove, connecting the retrieval clamp 4 to the buried anchor pile 31 as a single unit, facilitating the removal of the buried anchor pile 31.

[0073] As another installation method for the buried anchor pile 31, the buried anchor pile 31 has external threads on its outer circumference, and the direction of rotation of the connecting thread groove is opposite to that of the external thread. The buried anchor pile 31 is screwed into the ground and rotates in the opposite direction when retrieved, which allows for rapid retrieval of the buried anchor pile 31.

[0074] The following are specific applications of the green, lightweight, cross-shaped, quick-assembly static load reaction frame testing device provided in this application:

[0075] (1) Anchor selection: Based on the geological report and the estimated maximum test load (3000kN), the corresponding buried anchor 31 is selected.

[0076] (2) Installation: A small hydraulic rotary drilling rig equipped with a torque monitor was used. The connector 32 at the top of the buried anchor pile 31 was connected to the drill drive head. The buried anchor pile 31 was vertically aligned with the predetermined hole position, and the drill was started. Under stable downward pressure, it was rotated and driven into the soil. The final torque was recorded throughout the installation process as a preliminary verification of the anchor pile's bearing capacity. The four buried anchor piles 31 were installed sequentially.

[0077] (3) Main beam erection: Using a crane or manual labor, two prefabricated high-strength aluminum alloy I-beams (first crossbeam 12 and second crossbeam 13) are placed horizontally above the test pile in a cross shape.

[0078] Node connection: Six high-strength bolts are simultaneously inserted into aligned pin holes from the side, and cotter pins are installed at the other end of the pin shafts to prevent them from falling off. This forms a stable cross-shaped structure between the first crossbeam 12 and the second crossbeam 13.

[0079] Installation of jack 2: Place the hydraulic jack 2 at the bottom of the junction of the first crossbeam 12 and the second crossbeam 13, and install the load sensor on the jack 2.

[0080] Precision rolled threaded steel is used as the first cable 11, which passes through the reserved holes at the ends of the first crossbeam 12 and the second crossbeam 13, and the hole at the top of the buried anchor pile 31 in sequence.

[0081] The first threaded sleeve 111 and the second threaded sleeve 112 are screwed into the top of the main beam and the bottom of the buried anchor pile 31 connector 32 and tightened, so that the reaction frame 1 and the multiple buried anchor piles 31 are tensioned into an integral space truss structure.

[0082] The test load is applied to the pad 21 at the top of the test pile by the jack 2, and the reaction force is transmitted to the buried anchor pile 31 through the reaction frame 1. Finally, it is balanced by the interaction force (frictional resistance and end resistance) between the anchor pile blade and the surrounding soil.

[0083] (4) Start the synchronous loading control system and control jack 2 to apply pressure synchronously and uniformly according to the predetermined load level. Record the settlement of the pile top under each load level according to the specifications. Continue loading until the maximum test load is reached or the loading termination condition is met, and then unload in stages.

[0084] (5) After complete unloading, remove the second screw sleeve 112 and the first screw sleeve 111 in sequence, and remove the reaction frame 1 and the jack 2.

[0085] The retrieval clamp 4 is securely clamped to the connector 32 at the top of the exposed buried anchor pile 31. The hydraulic motor integrated into the retrieval clamp 4 drives the buried anchor pile 31 to rotate slowly in the opposite direction of implantation. Under the combined action of the reverse rotational force and a certain upward pulling force, the buried anchor pile 31 is gradually rotated out of the soil. The retrieval process causes minimal disturbance to the soil and allows for the complete and clean removal of the buried anchor pile 31.

[0086] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A green, lightweight, cross-shaped, quick-assembly static load reaction frame testing device, characterized in that, include: The reaction frame (1) has a cross-shaped structure. The bottom surface of the middle part of the reaction frame (1) is provided with a docking end, and each of the four ends of the reaction frame (1) is provided with a first vertically extending cable (11). The top of the jack (2) is installed at the bottom of the docking end, and the bottom of the jack (2) is located on the foundation. An anchor assembly (3) includes four buried anchors (31), each buried anchor (31) having a connector (32) at its top, the connector (32) being connected to the bottom end of a corresponding first cable (11); and A recovery clamp (4) is used to connect to the buried anchor pile (31) to lift the buried anchor pile (31) upward; The reaction frame (1) includes: A first crossbeam (12) has a connecting plate (121) in the middle, the surface of the connecting plate (121) being perpendicular to the side of the first crossbeam (12), and the bottom of the first crossbeam (12) forming the mating end; and Two second crossbeams (13) are symmetrically arranged on both sides of the first crossbeam (12). The length direction of the second crossbeams (13) is perpendicular to the length direction of the first crossbeam (12). The inner end of the second crossbeams (13) is provided with a butt plate corresponding to the connecting plate (121). The butt plate and the connecting plate (121) are connected by fasteners (14). The two second crossbeams (13) cooperate with the first crossbeam (12) to form the cross-shaped structure. The ends of the first crossbeam (12) and the two second crossbeams (13) are respectively provided with the first cable (11). The reaction frame (1) also includes: A central column (15) is installed on the upper surface of the middle part of the first crossbeam (12), and a force transmission block (151) is provided on the top of the central column (15); Multiple diagonal braces (16), each end of which is connected to the central column (15) and either the first crossbeam (12) or the second crossbeam (13); and Multiple second cables (17) are radially distributed around the axis of the central column (15). One end of the second cable (17) is connected to the force transmission block (151), and the other end is connected to the outer end of the first crossbeam (12) or the second crossbeam (13), so that the first crossbeam (12) or the second crossbeam (13), the central column (15) and the second cables (17) form a triangular structure. The recovery clamp includes a main board, a screw head, and a rotating rod; the top of the main board has a rotating hole that runs through its own thickness, and the rotating rod passes through the rotating hole; the top of the buried anchor pile has a connecting threaded groove, and the connector has a threaded protrusion corresponding to the connecting threaded groove. The threaded protrusion and the connecting threaded groove are threadedly engaged, so that the connector is installed on the top of the buried anchor pile.

2. The green, lightweight, cross-shaped, quick-assembly static load reaction frame test device as described in claim 1, characterized in that, The bottom surface of the first crossbeam (12) gradually slopes downward from both ends toward the middle; The bottom surface of the second crossbeam (13) gradually slopes towards the inner end of the second crossbeam (13) from top to bottom.

3. The green, lightweight, cross-shaped, quick-assembly static load reaction frame test device as described in claim 1, characterized in that, The bottom of the jack (2) is abutted against a pad (21).

4. The green, lightweight, cross-shaped, quick-assembly static load reaction frame test device as described in claim 1, characterized in that, The sum of the thicknesses of the connecting plate (121) and the docking plate is equal to the thickness of the second crossbeam (13).

5. The green, lightweight, cross-shaped, quick-assembly static load reaction frame test device as described in claim 1, characterized in that, One side of the docking plate is connected to the connecting plate (121), and a reinforcing plate is provided between the other side and the side of the first crossbeam (12).

6. The green, lightweight, cross-shaped, quick-assembly static load reaction frame test device as described in claim 1, characterized in that, The ends of the first crossbeam (12) and the second crossbeam (13) are provided with a plurality of connecting holes at intervals. The connecting holes are connected vertically, and the first cable (11) passes through one of the plurality of connecting holes.

7. The green, lightweight, cross-shaped, quick-assembly static load reaction frame test device as described in claim 6, characterized in that, The first cable (11) is a screw rod, and a first screw sleeve (111) is provided on its outer periphery. The screw sleeve abuts against the top of the first crossbeam (12) or the second crossbeam (13), and the screw sleeve is screwed to the first cable (11). The buried anchor pile (31) has a receiving space, and the connector (32) has a limiting hole communicating with the receiving space; the lower end of the first cable (11) is fitted with a second threaded sleeve (112), the second threaded sleeve (112) is located in the receiving space, and the top of the second threaded sleeve (112) abuts against the bottom end of the limiting hole.

8. The green, lightweight, cross-shaped, quick-assembly static load reaction frame test device as described in claim 1, characterized in that, The multiple second cables (17) are divided into four groups, each group including two second cables (17), and the bottom ends of the two second cables (17) in the same group are respectively located on both sides of the end of the first crossbeam (12) or the second crossbeam (13).

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