Foundation pile high strain detection device

Abstract

The utility model relates to a kind of high strain detection devices of foundation pile, belong to foundation detection equipment technical field.The high strain detection device of foundation pile includes detection hammer, guide pipe, pile top reinforcing plate and unhooker;Wherein, detection hammer is used for hammering foundation pile;Guide pipe is sleeved in the outer periphery of detection hammer, and coaxial with detection hammer, for guiding detection hammer to fall along vertical direction;Pile top reinforcing plate is welded in the bottom of guide pipe, for protecting pile top when detection hammer hammers foundation pile;Unhooker includes hook body, and the opening for hoisting detection hammer is equipped below hook body, first lifting hole for connecting lifting equipment main hook is opened in the top of hook body, second lifting hole for connecting lifting equipment auxiliary hook is opened in the side of hook body, first lifting hole is higher than second lifting hole, and second lifting hole is higher than the bottom surface of opening.The unhooker of the high strain detection device of foundation pile is only composed of hook body, opening and two lifting holes, simple structure, overcome the problem of unhooker in prior art.

Description

Technical Field

[0001] This utility model belongs to the technical field of foundation testing equipment, specifically relating to a high strain testing device for foundation piles. Background Technology

[0002] The high strain method is a testing method that uses a heavy hammer to impact the top of the pile, measures the velocity and force time history curves at the top of the pile, and uses wave theory analysis to determine the vertical bearing capacity and integrity of a single pile.

[0003] In the prior art, Chinese utility model patent CN204252175U provides a special guiding device for high strain testing of precast piles. The device includes a crossbeam, guide rail, ladder, base plate, fixed cylinder, rib plate, adjusting plate, high strain hammer, first wire rope, release device, shackle, second wire rope, rope and precast pile; however, the release device in this patent has a relatively complex structure, and when the load is too large, it may be difficult to release.

[0004] Therefore, how to provide a simple and easy-to-unhook high-strain detection device for foundation piles is a technical problem that urgently needs to be solved. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a high-strain detection device for foundation piles. The device consists of a hook body, an opening, and two lifting holes, forming a simple unhooking mechanism that overcomes the complexity of existing unhooking mechanisms.

[0006] This utility model provides a high strain detection device for foundation piles, comprising:

[0007] A test hammer is used to drive foundation piles.

[0008] The guide tube is sleeved around the outer periphery of the detection hammer and is coaxial with the detection hammer. It is used to guide the detection hammer to fall vertically.

[0009] A pile top reinforcing plate, which is welded to the bottom of the guide tube, is used to protect the pile top when the test hammer strikes the foundation pile;

[0010] The unhooking device includes a hook body with an opening at the bottom for lifting a test hammer, a first lifting hole at the top for connecting the main hook of the lifting equipment, and a second lifting hole at the side for connecting the auxiliary hook of the lifting equipment. The first lifting hole is higher than the second lifting hole, and the second lifting hole is higher than the bottom surface of the opening.

[0011] The unhooking device of this technical solution consists only of a hook body, an opening, and two lifting holes. Its simple structure overcomes the problem of complex unhooking devices in the prior art. By setting a first lifting hole (high position) and a second lifting hole (low position), mechanical unhooking is achieved by changing the position of the hook, avoiding the risk of difficulty in unhooking when the load is too large.

[0012] In some embodiments, the outer surface of the detection hammer is provided with a scale. During detection, the drop height and impact energy of the detection hammer are calculated by comparing the scale on the outer surface of the detection hammer with the guide tube.

[0013] This technical solution can directly and accurately calculate the drop hammer height and impact energy by comparing the scale with the guide tube, thereby improving the reliability of the detection data.

[0014] In some embodiments, the detection hammer includes a hammer cylinder and sealing plates at both ends of the hammer cylinder.

[0015] This technical solution enhances the strength of the hammer body through a steel pipe structure and increases the uniformity of mass distribution by filling with steel bars, making the impact force more stable.

[0016] In some embodiments, the top surface of the detection hammer is provided with a lifting lug.

[0017] This technical solution facilitates connection with a release device or lifting equipment through the design of lifting lugs.

[0018] In some embodiments, the guide tube comprises a steel tube with a diameter larger than that of the detection hammer.

[0019] In some embodiments, the guide tube includes a plurality of uprights and a retaining band, the uprights being arranged circumferentially around the same axis, and the retaining band being used to fix the uprights and form a hollow tubular structure.

[0020] This technical solution is lightweight and easy to assemble, making it suitable for various testing environments.

[0021] In some embodiments, angle steel is welded inside the guide tube to reduce the gap between the detection hammer and the guide tube.

[0022] This technical solution can limit the lateral swing of the detection hammer and improve the verticality and stability of the hammer strike.

[0023] In some embodiments, the angle steel has four sections, which are uniformly and symmetrically welded inside the guide tube.

[0024] This technical solution enables the testing hammer to be subjected to uniform force, avoids uneven wear or jamming, ensures smooth descent, and improves testing reliability.

[0025] In some embodiments, the pile top reinforcement plate includes a grid-shaped steel plate and a flat steel plate fixed to the top surface of the grid-shaped steel plate.

[0026] This technical solution enhances impact resistance through a grid-like structure and disperses impact force with flat steel plates, effectively protecting the pile top and extending the service life of the pile.

[0027] In some embodiments, the opening surface of the hook is smooth.

[0028] This technical solution can reduce frictional resistance, making unhooking smoother and avoiding jamming or unexpected delays in unhooking.

[0029] Based on the above solution, the high-strain detection device for foundation piles in this embodiment of the present invention consists only of a hook body, an opening, and two lifting holes, resulting in a simple structure that overcomes the complexity of existing hook release devices. By setting a first lifting hole (high position) and a second lifting hole (low position), mechanical release is achieved by changing the position of the hook, avoiding the risk of difficulty in release when the load is too heavy. The pile top reinforcing plate is welded to the bottom of the guide tube, directly protecting the pile top and reducing damage to the pile head from the impact of the detection hammer. The guide tube and the detection hammer are coaxially sleeved to ensure the hammering direction is perpendicular, improving the accuracy of the detection data. In summary, the high-strain detection device for foundation piles in this embodiment simplifies the structure of the hook release device (containing only a hook body, an opening, and high and low lifting holes), and uses a main hook and an auxiliary hook to achieve mechanical release, solving the problem of complexity and difficulty in release when the load is too heavy in existing hook release devices, thus improving reliability. The coaxial design of the guide tube and the detection hammer ensures the verticality of the hammering, while the pile top reinforcing plate welded to the bottom of the guide tube directly protects the pile head, reducing impact damage. The overall device has a simple structure and is easy to unhook, balancing detection accuracy with pile protection, effectively optimizing the operability and safety of high strain method testing. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0031] Figure 1 This is a schematic diagram of the structure of the high strain detection device for foundation piles of this utility model;

[0032] Figure 2 This is a schematic diagram of the structure of the detection hammer in an embodiment of this utility model;

[0033] Figure 3 This is a side view of the guide tube in an embodiment of the present invention;

[0034] Figure 4 This is a top view of the guide tube in an embodiment of this utility model;

[0035] Figure 5 This is a schematic diagram of the pile top reinforcing plate in an embodiment of this utility model;

[0036] Figure 6 This is a schematic diagram of the structure of the unhooking device in an embodiment of this utility model.

[0037] In the picture:

[0038] 1. Testing hammer; 2. Guide tube; 3. Pile top reinforcing plate; 4. Unhooking device; 5. Foundation pile;

[0039] 101. Lifting lug; 102. Hammer cylinder; 103. Sealing plate;

[0040] 201. Angle steel;

[0041] 301. Grid-shaped steel plate; 302. Flat steel plate;

[0042] 401. Hook body; 402. Opening; 403. First lifting hole; 404. Second lifting hole. Detailed Implementation

[0043] The technical solutions in the embodiments of this utility model 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 utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0044] In the description of this utility model, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0045] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0046] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] First, it should be noted that the high strain testing device for foundation piles in this utility model can be made using waste materials from the construction site, thereby avoiding the inconvenience of transporting the testing device during offshore construction and saving testing costs.

[0048] like Figures 1-6 As shown, in one embodiment of the high-strain detection device for foundation piles of this utility model, the high-strain detection device for foundation piles includes a detection hammer 1, a guide tube 2, a pile top reinforcing plate 3, and a release device 4; wherein, the detection hammer 1 is used to hammer the foundation pile 5; the guide tube 2 is sleeved on the outer periphery of the detection hammer 1 and is coaxial with the detection hammer 1, used to guide the detection hammer 1 to fall vertically; the pile top reinforcing plate 3 is welded to the bottom of the guide tube 2, used to protect the pile top when the detection hammer 1 hammers the foundation pile 5; as shown Figure 6 As shown, the unhooking device 4 includes a hook body 401. The hook body 401 has an opening 402 at its bottom for lifting the detection hammer 1. The top of the hook body 401 has a first lifting hole 403 for connecting the main hook of the lifting equipment. The side of the hook body 401 has a second lifting hole 404 for connecting the auxiliary hook of the lifting equipment. The first lifting hole 403 is higher than the second lifting hole 404, and the second lifting hole 404 is higher than the bottom surface of the opening 402.

[0049] In the above illustrative embodiment, the unhooking device 4 of the high strain detection device for foundation piles provided by this utility model consists only of a hook body 401, an opening 402, and two lifting holes. The structure is simple and overcomes the problem of complex unhooking devices 4 in the prior art. By setting the first lifting hole 403 (high position) and the second lifting hole 404 (low position), mechanical unhooking is achieved by changing the position of the hook, avoiding the risk of difficulty in unhooking when the load is too large. The pile top reinforcing plate 3 is welded to the bottom of the guide tube 2 to directly protect the pile top and reduce the damage to the pile head caused by the impact of the detection hammer 1. The guide tube 2 and the detection hammer 1 are coaxially sleeved to ensure that the hammering direction is perpendicular and improve the accuracy of the detection data. In summary, the high-strain pile testing device in this embodiment simplifies the structure of the unhooking device 4 (containing only the hook body 401, opening 402, and high and low lifting holes), and utilizes the main hook and auxiliary hook to achieve mechanical unhooking. This solves the problem of existing unhooking devices 4 being complex and difficult to unhook when the load is too heavy, thus improving reliability. The coaxial design of the guide tube 2 and the testing hammer 1 ensures the verticality of the hammer impact, while the pile top reinforcing plate 3 welded to the bottom of the guide tube 2 directly protects the pile head, reducing impact damage. The overall device has a simple structure, convenient unhooking, and balances testing accuracy with pile protection, effectively optimizing the operability and safety of high-strain pile testing.

[0050] In some embodiments, such as Figure 2 As shown, the outer surface of the testing hammer 1 is marked with graduations. During testing, the drop height and impact energy of the testing hammer 1 are calculated by comparing the graduations on the outer surface of the testing hammer 1 with those on the guide tube 2. By comparing the graduations with those on the guide tube 2, the drop height and impact energy can be calculated directly and accurately, improving the reliability of the test data and reducing human measurement errors.

[0051] In some embodiments, such as Figure 2As shown, the testing hammer 1 includes a hammer cylinder 102 and sealing plates 103 at both ends of the hammer cylinder 102. As an illustrative embodiment, the hammer cylinder 102 is made from scrap steel pipes from the construction site, and the sealing plates 103 are made from scrap steel plates. The hammer cylinder 102 is filled with scrap rebar ends. To prevent the rebar ends from bouncing during hammering and affecting the hammering force, cement grout is injected into the gaps between the rebar ends. The steel pipe structure enhances the strength of the hammer body, and the rebar end filling increases the uniformity of mass distribution, making the impact force more stable and improving the accuracy of the test.

[0052] In some embodiments, such as Figure 2 As shown, a reinforcing member is provided at the connection between the hammer cylinder 102 and the steel plate at the bottom of the hammer cylinder 102.

[0053] In some embodiments, such as Figure 2 As shown, the top surface of the detection hammer 1 is provided with a lifting lug 101. The lifting lug 101 facilitates connection with the unhooking device 4 or lifting equipment, improves operational convenience, and reduces installation and adjustment time.

[0054] In some embodiments, such as Figure 1 As shown, a lifting rope is threaded through the lifting lug 101, and a shackle is provided at the other end of the lifting rope. The shackle is hooked into the opening 402 of the hook body 401. When unhooking, only the auxiliary hook needs to be lifted.

[0055] In some embodiments, such as Figure 3 As shown, the guide tube 2 includes a steel tube with a diameter larger than that of the detection hammer 1.

[0056] In some embodiments, the guide tube 2 includes a plurality of uprights and a retaining band. The uprights are arranged circumferentially around the same axis, and the retaining band is used to fix the uprights and form a hollow tubular structure. When there are no suitable steel pipes available on the construction site to make the guide tube 2, the guide tube 2 is constructed by the uprights and the retaining band. The structure is lightweight and easy to assemble, suitable for different testing environments, and reduces transportation and installation costs.

[0057] In some embodiments, such as Figure 4 As shown, an angle steel 201 is welded inside the guide tube 2 to reduce the gap between the detection hammer 1 and the guide tube 2, limit the lateral swing of the detection hammer 1, and improve the verticality and stability of the hammering.

[0058] In some embodiments, such as Figure 4 As shown, there are four angle steels 201, which are evenly and symmetrically welded inside the guide tube 2. By evenly and symmetrically setting the four angle steels 201, the force on the detection hammer 1 is even, avoiding uneven wear or jamming, ensuring smooth descent, and improving detection reliability.

[0059] In some embodiments, such as Figure 5As shown, the pile top reinforcing plate 3 includes a grid-shaped steel plate 301 and a flat steel plate 302 fixed to the top surface of the grid-shaped steel plate 301. The grid-shaped structure enhances the impact resistance, while the flat steel plate 302 disperses the impact force, effectively protecting the pile top and extending the service life of the pile.

[0060] In some embodiments, the opening 402 of the hook body 401 has a smooth surface. The smooth surface of the opening 402 reduces frictional resistance, making unhooking smoother and avoiding jamming or unexpected delays in unhooking.

[0061] In some embodiments, the surface of the opening 402 of the hook body 401 is coated with lubricating oil. Applying lubricating oil further reduces friction, ensuring reliable hook release even under heavy loads, and improving detection efficiency and safety. As an illustrative embodiment, the hook release device 4 is manufactured by cutting and processing steel flange plates from the construction site. After processing, the first lifting hole 403, the second lifting hole 404, and the opening 402 are all polished smooth and coated with lubricating oil.

[0062] Through the description of several embodiments of the high strain testing device for foundation piles of this utility model, it can be seen that the embodiments of the high strain testing device for foundation piles of this utility model have at least one or more of the following advantages:

[0063] 1. The high strain detection device for foundation piles provided by this utility model consists of only a hook body 401, an opening 402 and two lifting holes. The structure is simple and overcomes the problem of complex hook release devices 4 in the prior art. By setting the first lifting hole 403 (high position) and the second lifting hole 404 (low position), mechanical release is achieved by changing the position of the hook, avoiding the risk of difficulty in releasing when the load is too large.

[0064] 2. The high strain testing device for foundation piles provided by this utility model directly protects the pile top by welding the pile top reinforcing plate 3 to the bottom of the guide tube 2, thereby reducing the damage to the pile head caused by the impact of the testing hammer 1.

[0065] 3. The high strain testing device for foundation piles provided by this utility model has the guide tube 2 and the testing hammer 1 coaxially sleeved to ensure that the hammering direction is perpendicular and improve the accuracy of the testing data.

[0066] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0067] The above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A high-strain detection device for foundation piles, characterized in that, include: A test hammer is used to drive foundation piles. The guide tube is sleeved around the outer periphery of the detection hammer and is coaxial with the detection hammer. It is used to guide the detection hammer to fall vertically. A pile top reinforcing plate, which is welded to the bottom of the guide tube, is used to protect the pile top when the test hammer strikes the foundation pile; The unhooking device includes a hook body with an opening at the bottom for lifting a test hammer, a first lifting hole at the top for connecting the main hook of the lifting equipment, and a second lifting hole at the side for connecting the auxiliary hook of the lifting equipment. The first lifting hole is higher than the second lifting hole, and the second lifting hole is higher than the bottom surface of the opening.

2. The high strain testing device for foundation piles according to claim 1, characterized in that, The outer surface of the testing hammer is marked with graduations. During testing, the height of the hammer drop and the impact energy are calculated by comparing the graduations on the outer surface of the testing hammer with those on the guide tube.

3. The high strain testing device for foundation piles according to claim 2, characterized in that, The testing hammer includes a hammer cylinder and sealing plates at both ends of the hammer cylinder.

4. The high strain testing device for foundation piles according to claim 2, characterized in that, The top surface of the testing hammer is equipped with a lifting lug.

5. The high strain testing device for foundation piles according to claim 1, characterized in that, The guide tube consists of a steel pipe with a diameter larger than that of the detection hammer.

6. The high strain testing device for foundation piles according to claim 1, characterized in that, The guide tube includes several uprights and a retaining hoop. The uprights are arranged circumferentially around the same axis, and the retaining hoop is used to fix the uprights and form a hollow tubular structure.

7. The high strain testing device for foundation piles according to claim 5 or 6, characterized in that, Angle steel is welded inside the guide tube to reduce the gap between the detection hammer and the guide tube.

8. The high strain testing device for foundation piles according to claim 7, characterized in that, Four angle steels are provided, and the four angle steels are evenly and symmetrically welded inside the guide tube.

9. The high strain testing device for foundation piles according to claim 1, characterized in that, The pile top reinforcement plate includes a grid-shaped steel plate and a flat steel plate fixed to the top surface of the grid-shaped steel plate.

10. The high strain testing device for foundation piles according to claim 1, characterized in that, The opening surface of the hook is smooth.

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