A counterweight device for static load detection of pile foundation

Abstract

The present disclosure relates to the technical field of pile foundation static load detection, and an embodiment of the present disclosure provides a counterweight device for pile foundation static load detection, which comprises a top sleeve and a ring-shaped support seat, the top sleeve is arranged on the ring-shaped support seat, a spliced plate is arranged on the ring-shaped support seat, a support counterweight assembly is arranged between the spliced plate and the ring-shaped support seat, a butt joint fixing assembly is arranged between the spliced plate and the top sleeve, the support counterweight assembly comprises a plurality of positioning sleeves, the positioning sleeves are fixed around the surface of the ring-shaped support seat, a telescopic rod is vertically connected in the positioning sleeve, a load bearing frame is arranged at the output end of the telescopic rod, one end of the load bearing frame is fixedly connected with the bottom of the spliced plate, and a pair of sockets are arranged on the surface of the load bearing frame. Through the above technical scheme, the technical problem of poor stability and inconvenient installation and use of the conventional counterweight device for pile foundation static load detection in the prior art is solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of static load testing of pile foundations, and more specifically, to a counterweight device for static load testing of pile foundations. Background Technology

[0002] In the field of pile foundation quality testing in building engineering, static load testing is the core method for determining the bearing capacity of pile foundations. It requires applying vertical loads to the pile foundation using a counterweight device to simulate actual stress conditions and verify whether the pile foundation meets design requirements. The stability and ease of installation of the counterweight device directly determine the safety and efficiency of the testing process—if the counterweight becomes unstable or installation takes too long, it may not only lead to deviations in the test data but also pose a risk of equipment overturning. However, traditional counterweight devices used for static load testing of pile foundations generally suffer from poor stability and inconvenience in installation and use, severely hindering the smooth progress of testing work.

[0003] Traditional counterweight devices often use a combination of stacked concrete counterweight blocks or steel weights. Concrete counterweight blocks are heavy and require cranes to lift them one by one when stacking. Furthermore, there is no dedicated fixing structure between the blocks, and they are stacked only by their own weight. This makes them prone to shifting or tilting due to uneven ground or wind, resulting in extremely poor stability. Although some devices use steel weights, the buckles between the weights are loose and they are prone to falling off under load and vibration, posing a safety hazard. Therefore, developing a stable and easy-to-install counterweight device for static load testing of pile foundations has become an urgent need for the industry to improve testing efficiency and safety. Utility Model Content

[0004] To overcome the above-mentioned defects, the embodiments of this disclosure provide a counterweight device for static load testing of pile foundations, which solves the technical problems of poor stability and inconvenience in installation and use of traditional counterweight devices for static load testing of pile foundations in the prior art.

[0005] According to one aspect, at least one embodiment of this disclosure provides a counterweight device for static load testing of pile foundations, comprising: A top sleeve and an annular support base, wherein the top sleeve is disposed on the annular support base; A plurality of splicing plates and a supporting counterweight assembly, wherein the splicing plates are disposed on the annular support base and the supporting counterweight assembly is disposed between the splicing plates and the annular support base; A docking and fixing component is disposed between the splicing plate and the top sleeve; The supporting counterweight assembly includes several positioning sleeves, each of which is fixed around the surface of the annular support base. A telescopic rod is vertically inserted into each positioning sleeve, and a load-bearing frame is provided at the output end of the telescopic rod. One end of the load-bearing frame is fixedly connected to the bottom of the splicing plate, and a pair of slots are provided on the surface of the load-bearing frame.

[0006] As a further technical solution, a counterweight frame is inserted into the socket, a positioning post is provided on the counterweight frame, a counterweight block is fitted onto the positioning post, and a docking frame is fixedly connected to the outside of the telescopic rod, with several docking frames fitting together with each other.

[0007] As a further technical solution, a sleeve is fitted between adjacent docking frames, and a stud is horizontally inserted into the sleeve and docking frame, with a nut screwed onto one end of the stud.

[0008] According to another aspect, in at least one embodiment of the present invention, the docking and fixing assembly includes a plurality of protrusions, the protrusions are arranged around the side surface of the top sleeve, and a pair of connecting blocks are provided on the surface of the splicing plate, a bolt is inserted into the connecting block, and one end of the bolt is connected to the protrusion by thread screwing.

[0009] As a further technical solution, a fixing sleeve and a docking sleeve are respectively provided at both ends of the outer surface of the splicing plate. A plug rod is horizontally and movably connected inside the fixing sleeve, and the plug rod is inserted into the docking sleeve on another adjacent splicing plate.

[0010] As a further technical solution, the frame has an overall U-shaped structure.

[0011] As a further technical solution, a push-pull block is provided on the insertion rod.

[0012] As a further technical solution, the several docking frames are connected by the sleeve to form an overall rectangular frame structure.

[0013] The beneficial effects of the embodiments disclosed herein are as follows: In this disclosure, the supporting counterweight assembly solves the problems of poor stability and low adaptability of traditional counterweight devices through flexible adjustment and stable splicing design. The telescopic rod can be finely adjusted in height to adapt to different scenarios, ensuring the load-bearing frame is horizontal; the connecting frame, sleeve frame, and studs work together to form an integral frame, distributing the force and avoiding local overload; the counterweight frame and positioning columns allow for layered stacking of counterweight blocks to meet different testing tonnage requirements, and the positioning columns prevent the counterweight blocks from sliding. This structure eliminates the need for cranes to stack the blocks one by one, reducing installation difficulty. At the same time, the frame-type support significantly improves stability, preventing the device from tilting or the counterweight from shifting during testing, ensuring accurate testing data, and providing a safe and reliable counterweight foundation for pile foundation static load testing. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0015] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure; Figure 2 This is an isometric drawing of the present disclosure; Figure 3 Appendix to this disclosure Figure 1 Enlarged view of part A in the middle; In the diagram: 1. Top sleeve; 2. Splicing plate; 3. Support counterweight assembly; 3-1. Positioning sleeve; 3-2. Telescopic rod; 3-3. Load-bearing frame; 3-4. Insert; 3-5. Counterweight frame; 3-6. Positioning column; 3-7. Counterweight block; 3-8. Connecting frame; 3-9. Sleeve frame; 3-10. Stud; 3-11. Nut; 4. Connecting and fixing assembly; 4-1. Protrusion; 4-2. Connecting block; 4-3. Bolt; 4-4. Fixing sleeve; 4-5. Connecting sleeve; 4-6. Insert rod; 5. Push-pull block; 6. Annular support seat. Detailed Implementation

[0016] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0017] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0018] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0019] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, 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 disclosure.

[0021] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] like Figures 1-3 As shown, it illustrates a counterweight device for static load testing of pile foundations according to an embodiment of this disclosure, comprising: Top sleeve 1 and annular support 6, wherein the top sleeve 1 is disposed on the annular support 6; A plurality of splicing plates 2 and a supporting counterweight assembly 3, wherein the splicing plates 2 are disposed on the annular support base 6, and the supporting counterweight assembly 3 is disposed between the splicing plates 2 and the annular support base 6; A docking and fixing component 4 is disposed between the splicing plate 2 and the top sleeve 1; The supporting counterweight assembly 3 includes several positioning sleeves 3-1, each of which is fixed around the surface of the annular support base 6. A telescopic rod 3-2 is vertically inserted into each positioning sleeve 3-1. A load-bearing frame 3-3 is provided at the output end of the telescopic rod 3-2. One end of the load-bearing frame 3-3 is fixedly connected to the bottom of the splicing plate 2. A pair of insertion slots 3-4 are provided on the surface of the load-bearing frame 3-3. A counterweight frame 3-5 is inserted into each insertion slot 3-4. A positioning post 3-6 is provided on the counterweight frame 3-5. A counterweight block 3-7 is fitted onto the positioning post 3-6. A docking frame 3-8 is fixedly connected to the outside of the telescopic rod 3-2. Several docking frames 3-8 fit together. A sleeve 3-9 is fitted between adjacent docking frames 3-8. A stud 3-10 is horizontally inserted into the sleeve 3-9 and the docking frame 3-8. A nut 3-11 is screwed onto one end of the stud 3-10.

[0023] In some examples, to achieve stable splicing support and precise installation of counterweight during static load testing of pile foundations, and to avoid tilting of the counterweight device due to unstable support or displacement of counterweight block 3-7 leading to deviations in test data, a support counterweight assembly 3 was designed. This assembly includes several positioning sleeves 3-1 fixed around the surface of the annular support base 6, evenly distributed along the annular ring, providing a vertical installation reference for the telescopic rod 3-2, ensuring that the telescopic rod 3-2 can bear force vertically, and preventing the tilting of the telescopic rod 3-2 from causing the load-bearing frame 3-3 to shift. The telescopic rod 3-2, vertically inserted into the positioning sleeve 3-1, can adjust its length by telescoping, thereby changing the height of the load-bearing frame 3-3 to adapt to the overall height requirements of the counterweight device under different testing scenarios. At the same time, it can finely adjust the length of each telescopic rod 3-2 according to the levelness of the annular support base 6, ensuring that the load-bearing frame 3-3 is always in a horizontal state, providing a flat foundation for counterweight installation.

[0024] The load-bearing frame 3-3 at the output end of the telescopic rod 3-2 is fixedly connected to the bottom of the splicing plate 2. The weight of the splicing plate 2 and the subsequent counterweight can be transferred to the telescopic rod 3-2 through the load-bearing frame 3-3, and then transmitted to the annular support seat 6 by the telescopic rod 3-2, forming a stable force transmission path. A pair of sockets 3-4 on the surface of the load-bearing frame 3-3 provide insertion and positioning for the counterweight frame 3-5. After the counterweight frame 3-5 is inserted into the sockets 3-4, the lateral displacement of the counterweight frame 3-5 can be restricted through the sockets 3-4 to ensure that the counterweight frame 3-5 is installed firmly. The positioning post 3-6 on the counterweight frame 3-5 is used to mount the counterweight block 3-7. The positioning post 3-6 can form a vertical limit on the counterweight block 3-7 to prevent the counterweight block 3-7 from sliding horizontally during the test. At the same time, multiple counterweight blocks 3-7 can be layered and mounted on the positioning post 3-6 according to the total amount of counterweight required for the test, so as to realize the flexible stacking of counterweights and meet the static load test requirements of different tonnages.

[0025] Several connecting frames 3-8 are fixed externally to the telescopic rod 3-2. Adjacent connecting frames 3-8 are connected by sleeves 3-9, studs 3-10, and nuts 3-11. The sleeves 3-9 are fitted on the outside of the adjacent connecting frames 3-8, and the studs 3-10 are horizontally inserted into the sleeves 3-9 and connecting frames 3-8. Tightening the nuts 3-11 can tightly fix the adjacent connecting frames 3-8, so that multiple telescopic rods 3-2 form an integral load-bearing structure, avoiding excessive stress on a single telescopic rod 3-2 that could cause deformation, and enhancing the overall load-bearing stability of the support counterweight assembly 3.

[0026] During operation, the length of the telescopic rod 3-2 is adjusted according to requirements, and the fixing frame 3-8 is secured. The counterweight frame 3-5 is inserted into the socket 3-4 of the load-bearing frame 3-3, and the counterweight block 3-7 is fitted onto the positioning column 3-6. The load-bearing frame 3-3 supports the splicing plate 2, forming a stable counterweight system. The telescopic adjustment adapts to height requirements, the splicing reinforcement enhances overall stability, the layered counterweight meets the testing tonnage, and the coordinated operation of all components achieves stable splicing support and counterweight installation, ensuring the smooth conduct of static load testing of the pile foundation.

[0027] like Figures 1-3 As shown in the figure, the docking fixing component 4 in this embodiment includes a plurality of protrusions 4-1. The protrusions 4-1 are arranged around the side surface of the top sleeve 1. Each surface of the splicing plate 2 is provided with a pair of connecting blocks 4-2. Bolts 4-3 are inserted into the connecting blocks 4-2. One end of the bolts 4-3 is connected to the protrusions 4-1 by thread screwing. Fixed sleeves 4-4 and docking sleeves 4-5 are respectively provided at both ends of the outer surface of the splicing plate 2. A plug rod 4-6 is horizontally and movably connected inside the fixed sleeve 4-4. The plug rod 4-6 is inserted into the docking sleeve 4-5 on another adjacent splicing plate 2.

[0028] In some examples, to achieve precise docking and fixing of the counterweight device and the pile foundation, avoid relative displacement between the counterweight device and the pile foundation during the testing process, ensure that the static load can be fully applied to the pile foundation, improve the accuracy of the test data, and facilitate the quick assembly and disassembly of the counterweight device, a docking and fixing component 4 is designed. This component includes several protrusions 4-1 arranged around the side surface of the top sleeve 1, which correspond one-to-one with the connecting blocks 4-2 on the surface of the splicing plate 2. The protrusions 4-1 and the connecting blocks 4-2 are connected by bolts 4-3, which can tightly fix the top sleeve 1 and the splicing plate 2. The top sleeve 1 can form an integral structure with the splicing plate 2, the supporting counterweight component 3 and the annular support seat 6. The top sleeve 1 directly docks with the top of the pile foundation. The tightness of the connection by bolts 4-3 prevents gaps between the top sleeve 1 and the splicing plate 2 from causing uneven force transmission, and ensures that the pressure of the counterweight can be evenly transmitted to the pile foundation through the top sleeve 1 during static load testing.

[0029] The fixing sleeves 4-4 and the docking sleeves 4-5 at both ends of the outer surface of the splicing plate 2 provide a connection structure for splicing adjacent splicing plates 2. In adjacent splicing plates 2, the insertion rod 4-6 of one splicing plate 2 extends horizontally from the fixing sleeve 4-4 and is inserted into the docking sleeve 4-5 of another splicing plate 2. This enables the lateral positioning of adjacent splicing plates 2, prevents the splicing plates 2 from shifting circumferentially on the annular support 6, and ensures that multiple splicing plates 2 can form a complete annular splicing structure around the top sleeve 1, covering the periphery of the top of the pile foundation and providing sufficient space for the installation of counterweights. The cooperation between the insertion rod 4-6 and the fixing sleeves 4-4 and docking sleeves 4-5 can also help transfer the force between adjacent splicing plates 2, avoid the concentration of force on a single splicing plate 2, and enhance the overall load-bearing capacity of the splicing plates 2.

[0030] The dual fixing structure of bolt 4-3 connection and insertion positioning ensures both tight connection between top sleeve 1 and splicing plate 2 and stable splicing between splicing plates 2, enabling the docking fixing component 4 to firmly connect the counterweight device to the pile foundation. At the same time, during disassembly and assembly, it is only necessary to remove bolt 4-3 and pull out insertion rod 4-6 to separate the components, making the operation convenient.

[0031] During operation, the top sleeve 1 is fitted onto the top of the pile foundation. The splicing plate 2 is connected to the top sleeve 1 protrusion 4-1 and bolt 4-3 via connecting block 4-2. Adjacent splicing plates 2 are fixed to the fixing sleeve 4-4 and the docking sleeve 4-5 by insert rod 4-6, forming a complete docking structure. The tightening of bolt 4-3 ensures accurate force transmission, the insertion positioning prevents component displacement, and the double fixing improves docking stability. All components work together to achieve reliable docking between the counterweight device and the pile foundation, providing a precise force transmission basis for the static load testing of the pile foundation.

[0032] For example, such as Figure 1 As shown, the frame 3-9 has an overall U-shaped structure.

[0033] In some examples, the sleeve 3-9 has an overall U-shaped structure, with its opening facing the mating area of ​​the adjacent docking frame 3-8, forming a semi-enclosed embrace of the two mating docking frames 3-8 from the outside. Compared to a closed sleeve 3-9, the U-shaped structure facilitates quick insertion into adjacent docking frames 3-8, eliminating the need to insert the sleeve 3-9 through the end of the docking frame 3-8, greatly simplifying the installation process. This is especially beneficial in scenarios where multiple docking frames 3-8 are densely distributed, improving splicing and reinforcement efficiency.

[0034] For example, such as Figure 3 As shown, a push-pull block 5 is provided on the insertion rod 4-6.

[0035] In some examples, the push-pull block 5 on the insertion rod 4-6 is located outside the fixing sleeve 4-4. Its surface can be designed with anti-slip texture or have an added raised structure to provide operators with a convenient point of force application. When it is necessary to splice or disassemble adjacent splicing plates 2, the operator only needs to push or pull the push-pull block 5 to easily control the insertion or removal of the insertion rod 4-6 between the fixing sleeve 4-4 and the docking sleeve 4-5 without the need for additional tools, which significantly improves the ease of operation of the docking fixing component 4.

[0036] For example, such as Figure 1 As shown, the several docking frames 3-8 are connected by the sleeve frame 3-9 to form a rectangular frame structure.

[0037] In some examples, the connecting frame 3-8, connected by the sleeve frame 3-9, forms a rectangular frame structure. This structure allows multiple telescopic rods 3-2 to form evenly distributed force-bearing units on the annular support seat 6, uniformly transferring the counterweight weight to all areas of the annular support seat 6 and preventing excessive local stress that could cause deformation or tilting of the annular support seat 6. The regularity of the rectangular frame structure also ensures consistent spacing between the telescopic rods 3-2, making the support of the load-bearing frame 3-3 on the splicing plate 2 more balanced, preventing the splicing plate 2 from warping due to uneven stress, and ensuring the stability of the counterweight block 3-7 after installation.

[0038] In practical use: Place the annular support seat 6 in the pile foundation testing area. Adjust the length of the telescopic rod 3-2 of the support counterweight assembly 3 according to the testing requirements to keep the load-bearing frame 3-3 horizontal. Then, fit the sleeve 3-9 onto the outside of the adjacent docking frame 3-8, insert the stud 3-10 and tighten the nut 3-11 to form a stable frame for the docking frame 3-8. Insert the counterweight frame 3-5 into the insertion slot 3-4 of the load-bearing frame 3-3, and layer the counterweight blocks 3-7 on the positioning post 3-6 of the counterweight frame 3-5. Next, assemble several splicing plates 2, push the insertion rod 4-6 to extend it from the fixing sleeve 4-4 and insert it into the docking sleeve 4-5 of the adjacent splicing plate 2 to complete the annular assembly of the splicing plate 2. Finally, fit the top sleeve 1 onto the top of the pile foundation and tighten it with the bolt 4-3 in the connecting block 4-2 and the protrusion 4-1 on the side surface of the top sleeve 1 to ensure that the top sleeve 1, splicing plate 2 and annular support seat 6 form a whole. After the test is completed, remove bolt 4-3, pull out the plug rod 4-6, and remove the counterweight 3-7 and counterweight frame 3-5 in sequence to complete the disassembly of the device. Stable installation and convenient operation are achieved throughout the process.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A counterweight device for static load testing of a pile foundation, characterized in that, include: A top sleeve (1) and an annular support base (6), wherein the top sleeve (1) is disposed on the annular support base (6); A plurality of splicing plates (2) and a supporting counterweight assembly (3), wherein the splicing plates (2) are disposed on the annular support base (6) and the supporting counterweight assembly (3) is disposed between the splicing plates (2) and the annular support base (6); A docking fixing component (4) is disposed between the splicing plate (2) and the top sleeve (1); The supporting counterweight assembly (3) includes several positioning sleeves (3-1), each of which is fixed around the surface of the annular support base (6). A telescopic rod (3-2) is vertically inserted into each positioning sleeve (3-1). A load-bearing frame (3-3) is provided at the output end of the telescopic rod (3-2). One end of the load-bearing frame (3-3) is fixedly connected to the bottom of the splicing plate (2). A pair of slots (3-4) are provided on the surface of the load-bearing frame (3-3).

2. The counterweight device for static load testing of pile foundations according to claim 1, characterized in that, A counterweight frame (3-5) is inserted into the socket (3-4). A positioning post (3-6) is provided on the counterweight frame (3-5). A counterweight block (3-7) is fitted onto the positioning post (3-6). A docking frame (3-8) is fixedly connected to the outside of the telescopic rod (3-2). Several docking frames (3-8) fit together with each other.

3. A counterweight device for static load testing of pile foundations according to claim 2, characterized in that, A sleeve (3-9) is fitted between adjacent docking frames (3-8). A stud (3-10) is horizontally inserted into the sleeve (3-9) and the docking frame (3-8). A nut (3-11) is screwed to one end of the stud (3-10).

4. A counterweight device for static load testing of pile foundations according to claim 1, characterized in that, The docking fixing component (4) includes several protrusions (4-1). The protrusions (4-1) are arranged around the side surface of the top sleeve (1). Each splicing plate (2) has a pair of connecting blocks (4-2). Bolts (4-3) are inserted into the connecting blocks (4-2). One end of the bolt (4-3) is connected to the protrusion (4-1) by screwing.

5. A counterweight device for static load testing of pile foundations according to claim 4, characterized in that, The outer surface of the splicing plate (2) is provided with a fixing sleeve (4-4) and a docking sleeve (4-5) at both ends. A plug rod (4-6) is horizontally and movably connected inside the fixing sleeve (4-4). The plug rod (4-6) is inserted into the docking sleeve (4-5) on another adjacent splicing plate (2).

6. A counterweight device for static load testing of pile foundations according to claim 3, characterized in that, The frame (3-9) has an overall U-shaped structure.

7. A counterweight device for static load testing of pile foundations according to claim 5, characterized in that, A push-pull block (5) is provided on the insertion rod (4-6).

8. A counterweight device for static load testing of pile foundations according to claim 3, characterized in that, Several of the docking frames (3-8) are connected by the sleeve frame (3-9) to form a rectangular frame structure.

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