A pile foundation static load test detachable portable reference beam

Abstract

This utility model provides a detachable portable reference beam for static load testing of pile foundations, comprising four beam plates symmetrically arranged at four corners. Anti-slip pads are fixed to the inner sides of each beam plate. Transverse sliding tracks are provided on both sides of each beam plate, within which beam segments are slidably connected. Each beam segment and beam plate has a layer of bolt holes, and the upper and lower layers of bolt holes are fixed together by bolts. Adjacent beam segments are connected by connectors. Adjustable legs are also connected to the ends of each beam segment. This utility model has the following advantages: the device is easy to assemble, disassemble, and transport; all components can be disassembled and connected; the disassembled component is small in size and light in weight, facilitating manual handling and vehicle transportation, reducing transportation difficulty and cost; it also has high adaptability, as beam segments can be spliced ​​as needed; and the length of the support legs is adjustable to adapt to different pile foundation lengths and site heights, meeting diverse testing requirements.

Description

Technical Field

[0001] This utility model is a detachable and portable reference beam for static load testing of pile foundations, belonging to the field of pile foundation testing. Background Technology

[0002] In static load tests of pile foundations, the reference beam is a key device for ensuring the accuracy of settlement measurement, and its main function is to provide a stable measurement benchmark. Traditional reference beams are mostly monolithic structures or complex, inconveniently assembled and disassembled composite structures, which have obvious drawbacks in practical applications: monolithic reference beams are bulky and difficult to transport using conventional transportation vehicles, increasing transportation costs and difficulties; the installation and disassembly process is time-consuming and labor-intensive, requiring multiple people to work together for on-site assembly and debugging, which seriously affects test efficiency; it is difficult to quickly adjust the structural dimensions to meet the needs of pile foundation tests of different specifications, and the entire beam must be replaced if some parts are damaged, resulting in low equipment reuse rate and high operating costs.

[0003] To address the aforementioned issues, several improved solutions have emerged in related fields. For example, Chinese Patent CN219568993U discloses an adjustable static load test reference beam, comprising a main beam, a main rod, a first reinforcing rod, a first threaded hole, bolts, nuts, a secondary beam, a secondary rod, a second reinforcing rod, and a second threaded hole. During operation, the secondary rod is embedded inside the main rod and its extension length can be adjusted, simultaneously adjusting the extension length of the secondary beam. Multiple main beams can also be spliced ​​together using the secondary beam. This device allows for length adjustment as needed; the retracted secondary beam reduces space requirements, facilitating transportation, and makes disassembly and assembly between multiple main beams convenient. However, this device has low disassembly and assembly efficiency, and the components are relatively heavy, increasing the burden of carrying them. Another example is Chinese Patent CN219033331U, which discloses a combined reference beam, comprising a reference beam body, two fixing cylinders, a screw, a mounting base, and a mounting sleeve. During operation, a support plate is mounted on a reference pile using screws, the screw is rotated to adjust the height of the mounting base to be horizontal, and then the beam segment is mounted on the mounting base using locking bolts. This device can adjust the level, solving the problem of some reference beams lacking this function. However, the device is large in size, inconvenient to disassemble, has low installation efficiency, and is not easy to transport.

[0004] Currently, existing technologies have not fully resolved the balance issue between ease of transportation, efficient assembly and disassembly, structural stability, and adaptability of reference beams. To address this, this invention designs a detachable and portable reference beam for pile foundation static load testing. Through a modular, detachable structure and efficient adjustment design, it balances transportation convenience, installation efficiency, and measurement accuracy, improving the equipment's reusability and demonstrating significant practical value and promising prospects for wider application. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a detachable and portable reference beam for static load testing of pile foundations.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: A detachable portable reference beam for static load testing of pile foundations includes four beam plates symmetrically arranged at four corners. Anti-slip pads are snap-fitted onto the inner sides of each beam plate. Transverse sliding tracks are provided on both sides of each beam plate, with beam segments slidably connected within these tracks. Each beam segment and beam plate has a layer of bolt holes, and the upper and lower layers of bolt holes are fixed together by bolts. Adjacent beam segments are connected by connectors. Adjustable legs are also connected to the ends of each beam segment, and circular levels are mounted on the adjustable legs. Ear plates are installed at the right-angle corners of each beam plate, and a level is mounted on the beam plate. A protective mechanism is provided on the side of the level.

[0007] Furthermore, the adjustable support leg includes an upper support leg section and a lower support leg section. A second ear plate is welded and fixed to the top of the upper support leg section. The second ear plate is slidably connected to the beam section, and the second ear plate is fixed to the bolt hole on the beam section by bolts.

[0008] Furthermore, a vertical slide rail is provided at the bottom of the upper section of the support leg, and the lower section of the support leg is vertically slidably connected in the vertical slide rail. Both the upper and lower sections of the support leg have a layer of bolt holes on their outer surfaces, and the two layers of bolt holes are fixed together by bolts. A spiral base is welded to the bottom of the lower section of the support leg.

[0009] Furthermore, the circular level is hinged to the side of the upper section of the support leg.

[0010] Furthermore, a snap-fit ​​groove is provided on the beam plate, and the level is snapped and fixed in the snap-fit ​​groove.

[0011] Furthermore, the beam plate is provided with a locking block, and the anti-slip pad is provided with a locking groove, which is matched and engaged with the locking block.

[0012] Furthermore, the protective mechanism includes a threaded groove 1 provided on the upper and lower sides of the snap-fit ​​groove and a groove provided on the left and right sides of the snap-fit ​​groove. A threaded groove 2 is provided on one side of the groove. A connecting plate is movably connected to one side of the groove via a shaft. A cover plate is movably connected to the other end of the connecting plate. A fixing member is provided on the other end of the cover plate. The fixing member is adapted to both the threaded groove 1 and the threaded groove 2.

[0013] Furthermore, the fixing component includes a support rod and two rotating rods, with the two rotating rods located on opposite sides of the support rod. A spherical mounting groove is provided on each side of both the support rod and the rotating rods, and a movable ball is movably installed within the spherical mounting groove. The two movable balls are connected and fixed together by a connecting rod. A notch that mates with the connecting rod is installed at the opening of the spherical mounting groove. A screw head is fixedly installed at the end of the rotating rod away from the support rod, and the screw head is compatible with both threaded groove one and threaded groove two.

[0014] The beneficial effects of this utility model are: This device can be easily disassembled and transported. All components can be disassembled and connected. After disassembly, it is small in size and light in weight, making it easy to handle manually or transport by vehicle, thus reducing transportation difficulty and cost.

[0015] This device is highly adaptable, with beam segments that can be spliced ​​as needed and adjustable support leg lengths to accommodate different pile foundation lengths and site heights, meeting diverse testing requirements.

[0016] This device is stable and reliable. The anti-slip pad increases friction, the spiral base enhances support stability, and the level ensures the reference beam is level, thus improving the accuracy of test data.

[0017] This device has low maintenance costs, its components are independently detachable, and damaged parts can be replaced individually without the need for complete scrapping, thus saving on equipment maintenance costs.

[0018] By adjusting the design of the support legs, the connection position between the upper and lower sections of the support legs can be adjusted according to the usage scenario, thereby adjusting to different heights to adapt to different usage needs.

[0019] Through the design of the protective mechanism, in order to protect the level instrument during the disassembly and transportation of the device, the cover plate and connecting plate located in the groove can be pulled out. The 90-degree rotation of the connecting plate realizes the rotation fulcrum of the cover plate. The rotation of the cover plate realizes the shielding and protection of the level instrument. Subsequently, the connection and fixation of the fastener and the beam plate can be realized by threading the fastener with the threaded grooves on the upper and lower sides of the level instrument.

[0020] By designing the fastener, when connecting with the first threaded groove, the fastener is bent into a U-shaped structure. That is, the rotating rods on both sides are bent into a vertical support rod state through the movable ball and connecting rod. Then, the threaded heads at the ends of the rotating rods on both sides are matched with the first two threaded grooves. Then, the rotating rods on both sides are rotated, and the rotating rods drive the threaded heads to spirally drill into the first two threaded grooves.

[0021] The notch design allows the connecting rod to have room to rotate, so that it can still rotate even after being bent at ninety degrees. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of a detachable portable reference beam for static load testing of pile foundations according to this utility model; Figure 2 This is a schematic diagram of the beam-slab structure of a detachable portable reference beam for static load testing of pile foundations according to this utility model; Figure 3 This is a schematic diagram of the protective mechanism of a detachable portable reference beam for static load testing of pile foundations according to this utility model. Figure 4 This is a schematic diagram of the circular level of a detachable portable reference beam for static load testing of pile foundations according to this utility model. Figure 5 This is a schematic diagram of the fixing structure of a detachable portable reference beam for static load testing of pile foundations according to this utility model; Figure 6 This is a partial structural diagram of the fixing component of a detachable portable reference beam for static load testing of pile foundations according to this utility model; Figure 7 This is a schematic diagram of the support rod structure of a detachable portable reference beam for static load testing of pile foundations according to this utility model; Figure 8 This is a schematic diagram of the movable ball and connecting rod connection structure of a detachable portable reference beam for static load testing of pile foundations according to this utility model.

[0024] In the diagram, 1. Beam plate; 2. Anti-slip mat; 3. Beam segment; 4. Connector; 5. Upper section of support leg; 6. Lower section of support leg; 7. Spiral base; 8. Circular level; 9. Rotating rod; 10. Screw head; 11. Level instrument; 12. Ear plate; 13. Snap-fit ​​groove; 14. Threaded groove one; 15. Groove; 16. Threaded groove two; 17. Connecting plate; 18. Cover plate; 19. Fixing component; 20. Support rod; 21. Spherical mounting groove; 22. Notch; 23. Movable ball; 24. Connecting rod; 25. Connecting seat. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-8 This utility model provides a detachable portable reference beam technology solution for static load testing of pile foundations, including four beam plates 1, which are symmetrically arranged at the four corners. Anti-slip pads 2 are fixedly engaged on the inner side of each beam plate 1 to prevent slippage during the test and ensure the stability of the measurement reference. Transverse sliding tracks are provided on both sides of each beam plate 1, and beam segments 3 are slidably connected within these tracks. Both beam segments 3 and beam plates 1 have a layer of bolt holes, and the upper and lower layers of bolt holes are fixed together by bolts. Adjacent beam segments 3 are connected by connectors 4. The ends of beam segments 3 are also connected to adjusting legs. A circular level 8 is installed on the adjusting legs. An ear plate 12 is installed at the right-angle corner of the beam plate 1. A level 11 is installed on the beam plate 1 for real-time monitoring and adjustment of the levelness of the reference beam, thereby improving the accuracy of pile foundation settlement measurement. A snap-fit ​​groove 13 is provided on the beam plate 1, and the level 11 is snapped and fixed in the snap-fit ​​groove 13. A protective mechanism is provided on the side of the level 11.

[0027] See Figure 1 The adjustable support leg includes an upper support leg section 5 and a lower support leg section 6. A second ear plate 12 is welded and fixed to the top of the upper support leg section 5. The second ear plate 12 is slidably connected to the beam section 3. The second ear plate 12 is fixed to the bolt holes on the beam section 3 by bolts. A vertical slide rail is formed at the bottom of the upper support leg section 5. The lower support leg section 6 is vertically slidably connected in the vertical slide rail. Both the upper support leg section 5 and the lower support leg section 6 have a layer of bolt holes on their outer surfaces. The two layers of bolt holes are fixed together by bolts. The bottom of section 6 is welded and fixed with a spiral base 7, which can be screwed into the ground to enhance support stability and enable the reference beam to quickly reach a horizontal and stable state. The circular level 8 is hinged to the side of the upper section 5 of the support leg to ensure that the support leg does not shift and can keep the support leg in a vertical state. The adjustable support leg can adapt to different site heights, and each component is detachable, which is convenient for storage, transportation and individual replacement and maintenance of components, and improves the reusability of the equipment. The side of the circular level 8 is also provided with two sets of fixing parts 19, and the side of the upper section 5 of the support leg is provided with two sets of threaded grooves 14 that cooperate with the fixing parts 19.

[0028] See Figures 2-8The protective mechanism includes threaded grooves 14 on the upper and lower sides of the snap-fit ​​groove 13 and recesses 15 on the left and right sides of the snap-fit ​​groove 13. A second threaded groove 16 is provided on one side of each recess 15. A connecting plate 17 is movably connected to one side of each recess 15 via a shaft. A cover plate 18 is movably connected to the other end of the connecting plate 17. A fixing member 19 is provided at the other end of the cover plate 18. The fixing member 19 is adapted to both the first threaded groove 14 and the second threaded groove 16. Through the design of the protective mechanism, the device can be disassembled and transported safely. During the transport process, to protect the level instrument 11, the cover plate 18 and connecting plate 17 located in the groove 15 can be pulled out. The 90-degree rotation of the connecting plate 17 creates a pivot point for the cover plate 18, thus protecting the level instrument 11. Subsequently, the fixing member 19 is threaded into the threaded grooves 14 on the upper and lower sides of the level instrument 11 to secure it to the beam plate 1. The fixing member 19 includes a support rod 20 and two rotating rods 9, with the two rotating rods 9 located on the support rod 20. On both sides of the support rod 20 and the rotating rod 9, spherical mounting grooves 21 are provided on opposite sides. Movable balls 23 are movably installed within the spherical mounting grooves 21. The two movable balls 23 are connected and fixed together by a connecting rod 24. A notch 22 is installed at the opening of the spherical mounting groove 21 to mate with the connecting rod 24. The notch 22 design provides the connecting rod 24 with a space for rotation, allowing it to still rotate even after a 90-degree bend. The rotating rod 9 is located away from the support rod 20. A screw head 10 is fixedly installed at one end, and the screw head 10 is adapted to both the first thread groove 14 and the second thread groove 16. Through the design of the fixing member 19, when connected to the first thread groove 14, the fixing member 19 is bent into a U-shaped structure, that is, the rotating rods 9 on both sides are bent into a vertical support rod 20 through the movable ball 23 and the connecting rod 24. Then, the thread head 10 at the end of the rotating rods 9 on both sides is adapted to the two first thread grooves 14. Then, the rotating rods 9 on both sides are rotated, and the rotating rods 9 drive the thread head 10 to spirally drill into the two first thread grooves 14.

[0029] The circuits and electronic components, modules and controllers, or the heat dissipation holes and maintenance doors in the space of the adapted electrical equipment are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated. The content protected by this application does not involve improvements to software and methods or heat dissipation and maintenance.

[0030] In use, first select an appropriate number of beam segments 3 according to the pile foundation radius. The beam segments 3 are spliced ​​into a frame as needed by the connectors 4. The beam plate 1 is fixed to it to construct a measurement reference surface suitable for the test. The upper section 5 of the support leg is extended and retracted according to the pile foundation height to adapt to the site height. The spiral base 7 is screwed into the ground to enhance stability, offset external forces and ensure the rigidity of the frame. The anti-slip pad 2 can prevent the monitoring equipment from sliding. The level 11 is used to level the reference beam. The circular level 8 ensures that the support leg does not deviate, providing a horizontal and stable reference for displacement measurement, accurately reflecting the pile settlement and ensuring the reliability of the test data.

[0031] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A detachable and portable reference beam for static load testing of pile foundations, characterized in that, It includes four beams (1), which are symmetrically arranged at four corners. Anti-slip pads (2) are fixed to the inner side of each beam (1). Transverse slides are provided on both sides of each beam (1). Beam segments (3) are slidably connected in the transverse slides. A layer of bolt holes is provided on each beam segment (3) and each beam (1). The upper and lower layers of bolt holes are fixed by bolts. Adjacent beam segments (3) are connected by connectors (4). Adjustable legs are also connected to the ends of beam segments (3). A circular level (8) is installed on the adjustable legs. Ear plates (12) are installed at the right-angle corners of each beam (1). A level (11) is installed on each beam (1).

2. The detachable portable reference beam for static load testing of pile foundations according to claim 1, characterized in that, The adjustable support leg includes an upper support leg section (5) and a lower support leg section (6). A second ear plate (12) is welded and fixed to the top of the upper support leg section (5). The second ear plate (12) is slidably connected to the beam section (3). The second ear plate (12) is fixed to the bolt hole on the beam section (3) by bolts.

3. The detachable portable reference beam for static load testing of pile foundations according to claim 2, characterized in that, The upper section (5) of the support leg has a vertical slide rail at its bottom. The lower section (6) of the support leg is vertically slidably connected in the vertical slide rail. Both the upper section (5) and the lower section (6) of the support leg have a layer of bolt holes on their outer surfaces. The two layers of bolt holes are fixed together by bolts. The bottom of the lower section (6) of the support leg is welded and fixed with a spiral base (7).

4. The detachable portable reference beam for static load testing of pile foundations according to claim 3, characterized in that, The circular level (8) is hinged to the side of the upper section (5) of the support leg.

5. A detachable portable reference beam for static load testing of pile foundations according to claim 4, characterized in that, A snap-fit ​​groove (13) is provided on the beam plate (1), and the level (11) is snapped and fixed in the snap-fit ​​groove (13).

6. A detachable portable reference beam for static load testing of pile foundations according to claim 5, characterized in that, The beam plate (1) is provided with a locking block, and the anti-slip pad (2) is provided with a locking groove, which is matched with the locking block.

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