Foundation bearing capacity detection device

Abstract

The utility model provides a foundation bearing capacity detection device which is mainly used for detecting the bearing capacity of a foundation in a drill rod detection mode. The device comprises three main components, namely a punching box, a punching rod and a punching hammer, through special structural design, energy storage and release of impact force can be realized, and consistency of impact acting force of each time is ensured, so that the detection efficiency and accuracy of the bearing capacity of the foundation are improved. According to the utility model, the energy storage cavity is arranged in the punching box, the energy is stored through the compression spring, and the energy is transmitted to the punching rod in an impact release mode, so that the drill rod and the probe rod are pushed to effectively enter soil. The acting force of each impact is the same, so that deviation caused by difference of operators in the prior art is avoided, and the stability and the reliability of a detection result are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of foundation bearing capacity measurement, specifically to a foundation bearing capacity detection device. BACKGROUND

[0002] Foundation bearing capacity detection is a very important work in building engineering, which directly affects the safety and stability of the project. The traditional foundation bearing capacity detection method usually uses drill detection technology, which calculates the bearing capacity of the foundation by applying impact force to drill into the soil. This method is widely used in engineering practice, but the traditional drill detection technology has some shortcomings, mainly in the following aspects:

[0003] Multiple people are needed to operate: traditional drill detection usually requires two or more operators to complete the operation together. During the operation, one person needs to stabilize the drill, and the other person needs to lift the weight hammer to more than 50 centimeters and release the weight hammer, which makes it free fall. This operation method not only has high labor intensity, but also has the problem of low detection efficiency due to the incoordination of the operators or uneven distribution of forces.

[0004] Impact force is uneven or uncontrollable: the impact force of traditional equipment is usually determined by the weight of the weight hammer and the free fall height, which leads to uneven impact force and uncontrollable impact force. Excessive impact force may cause the drill to tilt or damage, while insufficient impact force may cause the drill to be unable to effectively enter the soil layer, resulting in inaccurate detection results. This uncontrollable impact force may cause large differences in test results each time, which affects the reliability and accuracy of the detection.

[0005] It is difficult to operate and has safety hazards: since traditional drill detection requires a lot of force to control the weight hammer, it increases the difficulty of operation to some extent. Especially in the case of multiple people working together, it is easy to cause operational errors or incoordination, which may cause equipment damage or operator injury. When the impact force of the drill is too large, it may also cause vibration, affecting the stability and safety of the equipment during testing.

[0006] Changes in impact force affect the accuracy of detection results: since the free fall of the weight hammer is usually completed by manual operation, the impact force may change due to the physical differences of the operators, the direction of the impact, and other factors. This change not only affects the stability of the impact force, but also causes the drill to have different soil penetration depths in the soil layer, which affects the final bearing capacity measurement results.

[0007] In view of the above problems, the prior art generally has the defects of unstable impact force, difficult operation, inconsistent detection results, etc., which affects the efficiency and accuracy of the foundation bearing capacity detection. Therefore, how to improve the consistency of the impact force, simplify the operation steps and improve the operation safety has become a key problem to be solved in the foundation bearing capacity detection technology. Practical new type content

[0008] The utility model provides a kind of foundation bearing capacity detection device, to solve the problems of uneven impact force, difficult operation and unstable detection result in prior art.The device is impacted by specially designed energy storage structure, so that the impact force is consistent each time, and single-person operation can be realized, thereby improving the detection efficiency and accuracy.

[0009] Specifically, the utility model includes the following parts:

[0010] The box is used to bear and fix the detection device, and the inner cavity is provided with an energy storage cavity and a guide cavity, and is connected by a suitable method. The inner cavity is provided with an energy storage spring, which can be compressed to store energy during pressing. The bottom surface is also provided with a magnetic block for interacting with the impact rod of ferromagnetic material, to ensure the off-axis effect of the impact rod in each recovery state.

[0011] The impact rod includes a drill rod, a guide block and a striking tip. The drill rod is used to penetrate the soil, and the guide block is provided with a guide cone surface on its surface to realize centering with the inner cavity guide cavity and ensure stable linear motion. The striking tip is in contact with the impact hammer, and transmits energy to the ground during impact to push the drill rod for foundation testing.

[0012] The impact hammer includes a impact sleeve hole and a resistance ring surface. This part is installed in the energy storage cavity inner cavity by sliding, and is connected with the energy storage spring at the bottom end. When the pressure generated by the pressing operation is released, the potential energy of the energy storage spring drives the impact hammer to impact downward, generates impact force, and pushes the drill rod into the soil.

[0013] Description of the working effect of each structure

[0014] The box and its inner cavity structure:

[0015] The design provides a stable working platform, and the box is provided with an energy storage cavity and a guide cavity, which can effectively store and release energy. The energy storage spring accumulates energy during pressing, and can provide uniform impact force each time it is released, to ensure the accuracy of the detection result.

[0016] The impact rod and its structure:

[0017] The structure is composed of a drill rod, a guide block and a striker. The drill rod is used to directly enter the soil, the striker is connected with the impact sleeve hole to ensure the stability and linear motion of the impact rod, and the inclination is avoided. The striker is in contact with the impact hammer, and the drill rod is pushed by transmitting the energy storage impact force, so that the effective soil penetration and accurate bearing capacity test are ensured.

[0018] The impact hammer structure comprises:

[0019] The part is slidably installed in the energy storage cavity, and is connected with the energy storage spring. The bottom surface of the impact hammer is provided with an impact sleeve hole and a ring surface. Through accurate design, the impact hammer can quickly and stably release the energy stored by the energy storage spring after the impact sleeve hole is aligned with the striker, and stable impact force is generated. This design effectively reduces the energy loss in the impact process, ensures the consistency of the impact force size each time, and improves the stability and repeatability of the test.

[0020] The utility model discloses the obtained beneficial effects are:

[0021] 1. In the utility model, through the special design of the impact rod structure, the energy is stored in the impact box pressed by the operator, and the energy is released instantaneously, so that the operator can complete the impact drill detection by single operation, can produce more uniform and stronger impact force, makes the drill rod can be more quickly, accurately and quickly into the earth, thereby improves the detection efficiency.

[0022] 2. In the utility model, the gravity of the impact hammer and the energy storage effect of the energy storage cavity are same, so that the design that the impact force size is consistent each time ensures that each link in the foundation bearing capacity detection process has high standardization, stability and repeatability, significantly improves the accuracy of test result, the reliability of equipment and the simplicity of operation, reduces the error source, effectively avoids the operation deviation of human and technology, thereby improves the overall effect and reliability of detection. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the overall structure schematic diagram of an embodiment of the utility model;

[0024] Figure 2 It is the internal structure schematic diagram of the impact box of an embodiment of the utility model;

[0025] Figure 3 It is the structure schematic diagram of the impact rod and the impact hammer of an embodiment of the utility model;

[0026] Figure 4 It is the initial state and each energy storage impact step schematic diagram of an embodiment of the utility model.

[0027] REFERENCE NUMERALS:

[0028] 100. Punch box; 110. Handrail; 120. Energy storage chamber; 130. Guide chamber; 121. Energy storage spring; 131. Centering inclined plane;

[0029] 200. Punch rod; 210. Probe rod; 220. Guide block; 230. Striking tip; 221. Guide cone surface;

[0030] 300, Magnetic block; 400, Punch hammer; 410, Punch sleeve hole; 411, Abutment ring surface. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0032] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0033] The following is in conjunction with the appendix Figures 1-4 This invention describes a foundation bearing capacity testing device provided by some embodiments of the present invention.

[0034] Punch box 100: This part is the basic component of the device, providing stable support. The inner cavity is provided with an energy storage chamber 120 and a guide chamber 130, which are fluidly connected by a suitable connection method. An energy storage spring 121 is installed in the energy storage chamber 120, which is designed to store energy during the downward pressing process.

[0035] Impact rod 200: This structure includes a probe rod 210, a guide block 220, and an impact tip 230, used for testing the bearing capacity of the foundation. The guide block 220, through its cooperation with the guide cavity 130, enables the directional transmission of impact force. The impact tip 230, through contact with the impact hammer 400, completes the energy transfer, propelling the probe rod 210 effectively into the soil.

[0036] Hammer 400: This part includes a punch hole 410 and an abutment surface 411, which is slidably installed in the inner cavity of the energy storage chamber 120 and connected to the energy storage spring 121. By releasing the energy stored in the energy storage spring 121, an instantaneous impact force is generated, which drives the probe rod 210 to perform effective probing work.

[0037] Specifically, the punch 200 includes a probe 210, a guide block 220, and a striking tip 230 connected sequentially from bottom to top. The guide block 220 is located inside the guide cavity 130, and the surface of the guide block 220 is provided with a guide cone surface 221. The inner side of the guide cavity 130 is provided with a centering inclined surface 131 arranged parallel to the surface of the guide cone surface 221. The bottom surface of the punch 400 is provided with a punching sleeve hole 410 of the same length and diameter as the striking tip 230. The bottom surface of the punch 400 is provided with an abutment surface 411 located on the outer periphery of the punching sleeve hole 410, and the abutment surface 411 is planar.

[0038] The bottom surface of the punch box 100 is provided with a sleeve hole, and the bottom end of the probe rod 210 penetrates the bottom surface of the punch box 100 through the sleeve hole. The diameter of the sleeve hole is larger than the diameter of the probe rod 210, and the diameter of the connecting opening between the energy storage cavity 120 and the guide cavity 130 is larger than the diameter of the striking tip 230.

[0039] The probe rod 210 has measuring scales on its surface, and its bottom end has an interface for adapting to different types of probes. The hammer 400 is a large-mass metal component that utilizes gravitational potential energy to enhance the probe's impact effect.

[0040] The surface of the punch box 100 is provided with a magnetic block 300 located on the bottom surface of the guide cavity 130, and the guide block 220 is a ferromagnetic material component.

[0041] In this embodiment, the operator only needs to press down on the impact box 100 to store energy through the energy storage device inside the energy storage chamber 120. When the impact force is released, the gravity of the impact hammer 400 and the elastic potential energy of the energy storage chamber 120 work together to ensure that the impact force is consistent each time, pushing the probe rod 210 accurately into the soil. The stability of the impact force ensures the accuracy of the detection results.

[0042] Working principle and usage process of this utility model:

[0043] Reference Appendix Figure 4 As shown, from left to right, the diagrams depict the initial state, the energy storage process, the centering process, and the final state of energy storage and release. These will be described in turn below:

[0044] Initial state: The energy storage spring 121 is at its initial length. Under the weight of the punch rod 200 and the hammer 400, it falls freely, causing the bottom surface of the guide block 220 to adhere to the bottom surface of the inner cavity of the guide cavity 130, and the bottom surface of the hammer 400 to adhere to the bottom surface of the inner cavity of the energy storage cavity 120. Under the magnetic attraction of the magnetic block 300, the punch rod 200 moves closer to one side of the magnetic block 300, causing the punch rod 200 to deviate from the axis of the energy storage cavity 120 and the guide cavity 130. The top of the hammer tip 230 naturally deviates from the punch sleeve hole 410 and abuts against the surface of the abutment ring 411.

[0045] Energy storage process: The operator adjusts the detection structure so that the punch rod 200 is vertically facing the detection foundation surface, and manually operates the handle 110 to press down on the punch box 100 with a downward force relative to the punch rod 200 and the punch hammer 400. The punch rod 200 and the magnetic block 300 move upward relative to each other inside the energy storage chamber 120 and the guide chamber 130. During this process, the energy storage spring 121 is compressed and stores energy.

[0046] Centering process: During the relative upward movement of the guide block 220, the guide cone surface 221 and the centering inclined surface 131 gradually approach each other until they are in contact. Under the action of the inclined surface of the centering inclined surface 131, part of the downward kinetic energy of the punch box 100 is converted into a force that pushes the guide block 220 toward the axis of the guide cavity 130, pushing the punch rod 200 to shift to the axis of the punch box 100 as a whole, and the tip of the punch 230 gradually moves toward the axis of the punch sleeve hole 410.

[0047] Energy storage and release: After the tip of the hammer 230 enters the hole 410, the elastic potential energy stored in the energy storage chamber 120 is released to push the hammer 400 to move downward instantly. At the same time, the potential energy of the energy storage spring 121 and the gravitational potential energy of the hammer 400 are released to strike the tip of the hammer 230. All potential energy is instantly converted into the kinetic energy of the rod 200, which pushes the rod 200 to perform probing work.

[0048] Finally, the downward thrust is released, and the punch box 100 is lifted, causing the punch box 100 and the punch hammer 400 to rise relative to the punch rod 200. After the guide block 220 contacts the bottom surface of the inner cavity of the guide cavity 130, the striking tip 230 completely disengages from the punch sleeve hole 410. Under the magnetic attraction of the magnetic block 300, the punch rod 200 moves closer to the magnetic block 300 and returns to its original state. All the above steps are repeated multiple times. By recording the number of hammer blows when the bottom end of the probe rod 210 is driven 30 cm into the soil and performing calculations, the bearing capacity value of the foundation is finally obtained.

[0049] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A foundation bearing capacity testing device, characterized in that, include: The device comprises a punch box (100), a punch rod (200), and a punch hammer (400). The punch box (100) has two interconnected energy storage chambers (120) and a guide chamber (130) on its inner side. The bottom end of the energy storage chamber (120) is connected to the top end of the guide chamber (130). An energy storage spring (121) is provided inside the energy storage chamber (120). The punch hammer (400) is slidably mounted inside the energy storage chamber (120) and connected to the bottom end of the energy storage spring (121). The punch rod (200) includes probe rods (210) connected sequentially from bottom to top. The guide block (220) and the striking tip (230) are provided. The guide block (220) is located inside the guide cavity (130), and the surface of the guide block (220) is provided with a guide cone surface (221). The inner side of the guide cavity (130) is provided with a centering inclined surface (131) arranged parallel to the surface of the guide cone surface (221). The bottom surface of the hammer (400) is provided with a punching sleeve hole (410) of the same length and diameter as the striking tip (230). The bottom surface of the hammer (400) is provided with an abutment surface (411) located on the outer periphery of the punching sleeve hole (410), and the abutment surface (411) is planar.

2. The foundation bearing capacity testing device according to claim 1, characterized in that, Handrails (110) are fixedly installed on the surface of the punch box (100), and the handrails (110) are symmetrically arranged on both sides of the punch box (100).

3. The foundation bearing capacity testing device according to claim 1, characterized in that, The longitudinal length of the energy storage spring (121) and the hammer (400) is greater than or equal to the longitudinal length of the energy storage chamber (120).

4. The foundation bearing capacity testing device according to claim 1, characterized in that, The bottom surface of the punch box (100) is provided with a sleeve hole, and the bottom end of the probe rod (210) passes through the sleeve hole to penetrate the bottom surface of the punch box (100). The diameter of the sleeve hole is larger than the diameter of the probe rod (210), and the diameter of the connecting opening between the energy storage chamber (120) and the guide chamber (130) is larger than the diameter of the striking tip (230).

5. The foundation bearing capacity testing device according to claim 1, characterized in that, The surface of the probe rod (210) is provided with a measuring scale, and the bottom end of the probe rod (210) is provided with an interface for adapting different types of probes.

6. The foundation bearing capacity testing device according to claim 1, characterized in that, The hammer (400) is a large-mass metal component that utilizes gravitational potential energy to enhance the probing impact effect.

7. The foundation bearing capacity testing device according to claim 1, characterized in that, The surface of the punch box (100) is provided with a magnetic block (300) located on the bottom surface of the guide cavity (130), and the guide block (220) is a ferromagnetic material component.

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