A hammer impact device for foundation bearing capacity testing

Abstract

This utility model discloses a hammer impact device for testing the bearing capacity of foundations, including a frame, a penetration rod, hydraulic outriggers, and horizontal bubble tubes. The frame is equipped with a hammer head and a guide tube, the guide tube being used to insert the penetration rod. The hydraulic outriggers are located at the lower ends of the frame's support legs and can be adjusted independently. Two horizontal bubble tubes are perpendicularly arranged on the same plane to assist in testing the levelness of the frame's plane, with the penetration rod perpendicular to this plane. This utility model, by setting hydraulic outriggers at the lower ends of the frame's support legs and arranging two horizontal bubble tubes perpendicularly to each other on a plane perpendicular to the penetration rod on the frame, can adjust the plane containing the two horizontal bubble tubes to be level by adjusting the hydraulic outriggers until the bubbles in the two horizontal bubble tubes are centered, thereby allowing the penetration rod to strike vertically downwards, thus achieving a vertical impact test.

Description

Technical Field

[0001] This utility model relates to the field of foundation testing technology, specifically to a hammer impact device for testing the bearing capacity of foundations. Background Technology

[0002] Foundation bearing capacity testing is a crucial step in ensuring the structural safety of hydraulic engineering projects. This test primarily assesses the bearing capacity of soil or rock as the foundation of a building. Traditional foundation bearing capacity testing often employs the penetration test method, where a heavy hammer is manually driven down onto a test rod, and the bearing capacity is assessed by recording the number of impacts and the insertion height of the test rod. However, manual testing is cumbersome, time-consuming, and labor-intensive.

[0003] Currently, foundation testing vehicles are commonly used for testing. These vehicles use a chassis to replace manual support and a motor-driven unit to lift a heavy hammer to strike a test rod. After testing, the vehicle can be moved to other monitoring points via wheels. Existing foundation testing vehicles can perform penetration tests. During testing, the heavy hammer is typically lifted to a fixed position before being lowered to ensure even impact. Therefore, it is necessary to ensure the hammer strikes vertically downwards. However, the test foundation is often not perfectly level. When the chassis tilts, the hammer lowers the test rod along the tilt direction, and the test rod penetrates the foundation at an angle. The penetration height recorded by the staff at this point cannot accurately reflect the penetration depth, leading to errors in the test results and making it difficult to accurately assess the foundation's bearing capacity.

[0004] Therefore, the existing method of using a ground testing vehicle for penetration testing has the problem that the vehicle frame is difficult to level, and when the ground is uneven, the frame tilts, making it difficult for the hammer to fall vertically, thus affecting the penetration depth test results of the test rod. Utility Model Content

[0005] The purpose of this utility model is to provide a hammer impact device for foundation bearing capacity testing, so as to solve the technical problem in the prior art that the hammer is difficult to fall vertically after the frame is tilted due to the difficulty in leveling the frame and the ground being uneven, thus affecting the test rod penetration depth test results.

[0006] To solve the above-mentioned technical problems, this utility model specifically provides the following technical solution:

[0007] A hammer-driven device for testing the bearing capacity of foundations, comprising:

[0008] A frame on which a hammer and a guide tube are mounted. The hammer is suspended on the frame by a winch. The guide tube is vertically installed inside the frame and located directly below the hammer. The guide tube is used to insert a penetration rod.

[0009] Hydraulic outriggers: The frame has three or four legs, and a hydraulic outrigger is installed at the lower end of each leg. The hydraulic outriggers can be adjusted independently to adjust the height of the legs.

[0010] Two horizontal bubble tubes are horizontally installed on the frame. The two horizontal bubble tubes are installed perpendicular to each other on the same plane to detect the flatness of the frame. The penetrating rod is perpendicular to the plane.

[0011] Furthermore, by adjusting the height of the hydraulic outriggers, the bubble positions of the two horizontal bubble tubes are centered, thereby leveling the frame and enabling vertical hammer impact detection.

[0012] As a preferred embodiment of this utility model, the frame includes a support frame and a base. The lower end of the base is provided with a traveling wheel. The hydraulic outrigger is fixed to the side of the base. The cylinder rod of the hydraulic outrigger faces downward. The lower end of the hydraulic outrigger is provided with a support plate. The level is provided on the upper surface of the base.

[0013] The base has a through-hole section, allowing the insertion rod to fall to the ground and strike.

[0014] In a preferred embodiment of this utility model, the conduit is disposed at the lower center of the support frame, the hammer has an opening at the center, the hammer is sleeved on the conduit through the opening, and the penetrating rod is hollow inside and sleeved on the lower end of the conduit.

[0015] The winch is mounted on the top of the support frame, and the connecting cable of the winch passes through the middle of the support frame and connects to the upper end of the hammer.

[0016] As a preferred embodiment of this utility model, a telescopic frame is provided at the lower middle part of the support frame, the telescopic frame can pass through the through hole in the middle of the base, a reset plate is provided at the lower end of the telescopic frame, the reset plate has a sleeve hole in the center, a striking seat is provided at the upper end of the penetrating rod, and the lower end of the penetrating rod is provided in the sleeve hole.

[0017] The diameter of the sleeve hole is larger than the diameter of the penetrating test rod but smaller than the diameter of the striking seat. The reset plate can fall with the telescopic frame so that the penetrating rod can fall to the ground, or rise with the telescopic frame to lift the striking seat and pull out the penetrating rod to reset.

[0018] As a preferred embodiment of this utility model, the telescopic frame is provided with a plurality of telescopic hydraulic rods, the rod body of the telescopic hydraulic rod is fixed to the periphery of the guide tube, the telescopic rod head of the telescopic hydraulic rod is set downward, and the reset plate is set on the telescopic rod head of the plurality of telescopic hydraulic rods.

[0019] As a preferred embodiment of this utility model, a scale is provided at the lower end of the catheter.

[0020] Compared with the prior art, this utility model has the following advantages:

[0021] This invention features hydraulic outriggers at the lower end of the support legs of the frame, and two horizontal bubble tubes on the plane perpendicular to the penetration rod on the frame. The two horizontal bubble tubes are perpendicular to each other. By adjusting the hydraulic outriggers until the bubbles in the two horizontal bubble tubes are centered, the plane containing the two horizontal bubble tubes can be adjusted to be horizontal, thereby enabling the penetration rod to drop vertically downwards and thus achieving a vertical impact test. Attached Figure Description

[0022] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0023] Figure 1 A schematic diagram of the structure of a hammering device for testing the bearing capacity of engineering foundations is provided for embodiments of this utility model;

[0024] Figure 2 This invention provides a schematic diagram of the internal structure of a hammering device for testing the bearing capacity of engineering foundations, as shown in the embodiments of the present invention.

[0025] Figure 3 A schematic diagram of the upper surface structure of the base is provided for an embodiment of this utility model.

[0026] The labels in the diagram represent the following:

[0027] 1-Frame; 2-Penetrating rod; 3-Hydraulic outrigger; 4-Horizontal bubble tube; 5-Telescopic frame;

[0028] 11-Hammerhead; 12-Conduit; 13-Support frame; 14-Base; 15-Walking wheel; 21-Strike seat; 31-Support plate; 51-Reset plate; 52-Telescopic hydraulic rod;

[0029] 121 - Scale. Detailed Implementation

[0030] 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.

[0031] like Figure 1 and 3 As shown, this utility model provides a hammering device for testing the bearing capacity of foundations, comprising:

[0032] The frame 1 is equipped with a hammer 11 and a guide tube 12. The hammer 11 is suspended on the frame 1 by a winch. The guide tube 12 is vertically installed inside the frame 1 and located directly below the hammer 11. The guide tube 12 is used to insert the penetration rod 2.

[0033] Hydraulic outrigger 3: The frame 1 has three or four outriggers, and each outrigger is equipped with a hydraulic outrigger 3 at the lower end. The hydraulic outrigger 3 can be adjusted independently to adjust the height of the outrigger.

[0034] Two horizontal bubble tubes 4 are installed horizontally on the frame 1. The two horizontal bubble tubes 4 are installed perpendicular to each other on the same plane to detect the levelness of the plane of the frame 1. The penetration rod 2 is perpendicular to the plane.

[0035] Furthermore, by adjusting the height of the hydraulic outriggers 3, the positions of the bubbles in the two horizontal bubble tubes 4 are centered, so that the frame 1 can be leveled to achieve vertical hammer impact detection.

[0036] In this embodiment, a hammer head 11 and a guide tube 12 are installed on the frame 1. The guide tube 12 is used to insert the penetration rod 2. The frame 1 has three or four legs, and each leg is equipped with a hydraulic support leg 3 at its lower end. The hydraulic support leg 3 can be independently adjusted to adjust the height of the support leg. Two horizontal bubble tubes 4 are also installed on the frame 1. The two horizontal bubble tubes 4 are installed perpendicularly to each other on the same plane, and the penetration rod 2 is perpendicular to the plane. By adjusting the height of the hydraulic support leg 3, the bubble positions of the two horizontal bubble tubes 4 are centered. The centered bubble of the horizontal bubble tube 4 indicates that the straight line where the horizontal bubble tube 4 is located is on the horizontal plane. When the bubbles of the two horizontal bubble tubes 4 are both centered, it can be determined that the plane where the two horizontal bubble tubes 4 are located is horizontal. The penetration rod 2 is perpendicular to the plane, thereby determining that the penetration rod 2 is vertically downward, thus realizing the vertical hammer test.

[0037] Compared to the existing method of using a ground-based testing vehicle for penetration testing, this embodiment sets up three or four hydraulic support legs 3 and two horizontal bubble tubes 4 on the frame 1. The penetration rod 2 is perpendicular to the plane where the two horizontal bubble tubes 4 are located. By adjusting the height of the hydraulic support legs 3, the bubbles in the two horizontal bubble tubes 4 are centered, and the plane where the two horizontal bubble tubes 4 are located can be adjusted to be horizontal. At this time, the penetration rod 2 can be vertically downward, thereby completing the vertical hammer test.

[0038] Currently, when conducting ground testing, it is usually necessary to conduct multiple tests at different locations of the foundation in order to assess the load-bearing capacity of the entire foundation. Therefore, the following preferred embodiments are proposed.

[0039] like Figures 1 to 3 As shown, the frame 1 includes a support frame 13 and a base 14. The lower end of the base 14 is provided with a traveling wheel 15. The hydraulic outrigger 3 is fixed to the side of the base 14. The cylinder rod of the hydraulic outrigger 3 faces downward. The lower end of the hydraulic outrigger 3 is provided with a support plate 31. The level 4 is provided on the upper surface of the base 14.

[0040] The base 14 has a through-hole in the middle so that the penetrating rod 2 can fall to the ground to strike.

[0041] Specifically, the frame 1 can be moved by the wheels 15. After moving to the test point, the hydraulic outriggers 3 are extended and leveled, and the wheels 15 are raised to prevent slippage.

[0042] To increase test stability, the lower end of the hydraulic outrigger 3 in this embodiment is provided with a support plate 31 with a large area. The support plate 31 can be further reinforced to the ground using existing fixing methods, such as pre-drilling holes in the support plate 31 and fixing it with insert rods.

[0043] To achieve the hammering of the penetration rod 2, the following preferred embodiments are proposed.

[0044] like Figure 1 and 2 As shown, the conduit 12 is located at the lower center of the support frame 13, and the hammer 11 has an opening at the center. The hammer 11 is sleeved on the conduit 12 through the opening, penetrates the hollow interior of the rod 2, and is sleeved on the lower end of the conduit 12.

[0045] The winch is located at the top of the support frame 13, and the connecting cable of the winch passes through the middle of the support frame 13 and connects to the upper end of the hammer 11.

[0046] Specifically, during the test, the winch can lift the hammer 11 along the guide tube 12. After releasing it, the hammer 11 can strike the penetrating rod 2 at the lower end of the guide tube 12, thereby realizing the hammer impact test.

[0047] In this embodiment, both the hammer head 11 and the penetration rod 2 are sleeved on the guide tube 12. When the entire frame 1 is leveled, the penetration rod 2 is vertically downward. The guide tube 12 only serves to limit the hammer head 11 and the penetration rod 2 to avoid the influence of external factors such as wind on the penetration rod 2. Correspondingly, after the hammer head 11 falls vertically, most of the impact force can be directly applied to the penetration rod 2. The impact of the impact on the guide tube 12 and the stability of the entire frame 1 is very small.

[0048] After leveling by adjusting the hydraulic outriggers 3 at different test points, the height of the center of the frame 1 from the ground is often different. In order to ensure that the penetration rod 2 can touch the ground after leveling before starting the impact test, and to be able to retrieve and lift the penetration rod 2 after the impact test is completed, the following preferred embodiments are proposed.

[0049] like Figure 1 and 2 As shown, a telescopic frame 5 is provided at the lower middle part of the support frame 13. The telescopic frame 5 can pass through the through hole in the middle of the base 14. A reset plate 51 is provided at the lower end of the telescopic frame 5. The reset plate 51 has a sleeve hole in the center. A striking seat 21 is provided at the upper end of the penetrating rod 2. The lower end of the penetrating rod 2 is located in the sleeve hole.

[0050] The diameter of the sleeve hole is larger than the diameter of the rod body of the penetrating rod 2, but smaller than the diameter of the striking seat 23. The reset plate 51 can fall with the telescopic frame 5 so that the penetrating rod 2 can fall to the ground, or rise with the telescopic frame 5 to lift the striking seat 21 to pull out and reset the penetrating rod 2.

[0051] Specifically, after leveling, the reset plate 51 is lowered by the telescopic frame 5. At this time, the insertion rod 2 can fall with the reset plate 51 under the action of gravity until it touches the ground. After the test, the reset plate 51 is raised and adjusted by the telescopic frame 3. The reset plate 51 can be raised to strike the seat 21 to pull out the insertion rod 2. The reset plate 51 is raised further to lift the insertion rod 2 off the ground and reset it.

[0052] After the reset plate 51 falls to the ground and the penetration rod 2 touches the ground, it needs to continue falling to reserve some height for the penetration rod 2 to fall. Under normal circumstances, the reset plate 51 can be directly lowered to the ground.

[0053] To achieve the lifting and lowering adjustment of the reset plate 51, the following preferred embodiments are proposed.

[0054] like Figure 1 and 2 As shown, the telescopic frame 5 is equipped with several telescopic hydraulic rods 52. The rod body of the telescopic hydraulic rod 52 is fixed to the periphery of the guide tube 12. The telescopic rod head of the telescopic hydraulic rod 52 is set downward. The reset plate 51 is set on the telescopic rod head of the several telescopic hydraulic rods 52.

[0055] Specifically, the reset plate 31 can be raised and lowered by the telescopic hydraulic rod 52.

[0056] Since the penetration rod 2 needs to be lowered to different heights to reach the ground after leveling, the relative position of the penetration rod 2 and the guide tube 12 also changes. Therefore, in order to visually observe the height of the penetration rod 2 after being hit, the following preferred embodiment is proposed.

[0057] like Figure 2 As shown, a scale 121 is provided at the lower end of the conduit 12.

[0058] Specifically, the relative position of the upper surface of the striking seat 21 is observed through the scale 121 at the lower end of the conduit 12, thereby recording the positional change information of the penetration rod 2.

[0059] In this embodiment, the four hydraulic outriggers 3 are lowered and adjusted until the bubbles in the two horizontal bubble tubes 4 are centered. The reset plate 51 is lowered through the telescopic frame 5 until it reaches the ground. At this time, the penetrating rod 2 touches the ground. The ruler 121 is observed and the position of the striking seat 21 is recorded. Then, the impact test is started, and the change in position of the striking seat 21 is observed and recorded through the ruler 121. After the test, the reset plate 51 is raised to pull out the penetrating rod 2 and the penetrating rod 2 is raised and reset. The hydraulic outriggers 3 are retracted, and the test point is moved and adjusted through the traveling wheels 15.

[0060] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A hammer-driven device for testing the bearing capacity of foundations, characterized in that, include: A frame (1) is provided with a hammer (11) and a guide tube (12). The hammer (11) is suspended on the frame (1) by a winch. The guide tube (12) is installed vertically inside the frame (1) and located directly below the hammer (11). The guide tube (12) is used to insert a penetrating rod (2). Hydraulic outriggers (3), the frame (1) has three or four legs, and each leg is equipped with a hydraulic outrigger (3) at its lower end. The hydraulic outriggers (3) can be adjusted independently to adjust the height of the legs. Two horizontal bubble tubes (4) are horizontally installed on the frame (1). The two horizontal bubble tubes (4) are installed perpendicular to each other on the same plane to detect the plane levelness of the frame (1). The penetrating rod (2) is perpendicular to the plane. Furthermore, by adjusting the height of the hydraulic outriggers (3), the positions of the bubbles in the two horizontal bubble tubes (4) are centered, so that the frame (1) can be leveled to achieve vertical hammer impact detection.

2. The hammer-driven device for foundation bearing capacity testing according to claim 1, characterized in that, The frame (1) includes a support frame (13) and a base (14). The lower end of the base (14) is provided with a walking wheel (15). The hydraulic outrigger (3) is fixed to the side of the base (14). The cylinder rod of the hydraulic outrigger (3) faces downward. The lower end of the hydraulic outrigger (3) is provided with a support plate (31). The level (4) is provided on the upper surface of the base (14). The base (14) has a central penetration so that the penetrating rod (2) can fall to the ground and strike.

3. The hammer-operated device for foundation bearing capacity testing according to claim 2, characterized in that, The conduit (12) is located at the lower center of the support frame (13). The hammer (11) has an opening at the center and is sleeved on the conduit (12) through the opening. The penetrating rod (2) is hollow inside and is sleeved on the lower end of the conduit (12). The winch is located at the top of the support frame (13), and the connecting cable of the winch passes through the middle of the support frame (13) and connects to the upper end of the hammer (11).

4. A hammer-operated device for foundation bearing capacity testing according to claim 3, characterized in that, The lower middle part of the support frame (13) is provided with a telescopic frame (5), which can pass through the hole in the middle of the base (14). The lower end of the telescopic frame (5) is provided with a reset plate (51), which has a sleeve hole in the center. The upper end of the penetrating rod (2) is provided with a striking seat (21), and the lower end of the penetrating rod (2) is provided in the sleeve hole. The diameter of the sleeve hole is larger than the diameter of the through test rod (2) and smaller than the diameter of the striking seat (23). The reset plate (51) can fall with the telescopic frame (5) so that the through rod (2) can fall to the ground, or rise with the telescopic frame (5) to lift the striking seat (21) to pull out and reset the through rod (2).

5. A hammer-operated device for foundation bearing capacity testing according to claim 4, characterized in that, The telescopic frame (5) is provided with a number of telescopic hydraulic rods (52). The rod body of the telescopic hydraulic rod (52) is fixed to the periphery of the guide tube (12). The telescopic rod head of the telescopic hydraulic rod (52) is set downward. The reset plate (51) is set on the telescopic rod head of the number of telescopic hydraulic rods (52).

6. A hammer-operated device for foundation bearing capacity testing according to claim 1, characterized in that, A scale (121) is provided at the lower end of the catheter (12).

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