A rapid detection device for bearing capacity of foundation

Abstract

The utility model discloses a kind of quick detection device of foundation bearing capacity, belong to building engineering technical field, including bottom plate, the top of bottom plate is fixedly connected with two first support rods symmetrically, the side of two first support rods is fixedly connected with same V-shaped guide seat, the top direction of V-shaped guide seat is equipped with taper head rod, the outer wall of taper head rod is slidably sleeved with drop hammer for hammering taper head rod downward insertion ground, the top of two first support rods is fixedly connected with same connecting plate, the top of connecting plate is fixedly connected with second support rod;The utility model can realize the effect of automatic knocking of drop hammer by starting drive motor to work continuously, and in automatic knocking process, automatic recording knock frequency can be realized, and after reaching set knock frequency, drive motor is automatically closed, whole process operation is simple, time-saving and labor-saving, without personnel intervention operation, degree of automation is high, not only reduce working strength, and guarantee detection accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of building engineering technology, and in particular relates to a rapid testing device for foundation bearing capacity. Background Technology

[0002] Foundation bearing capacity testing is a core technical step in modern geotechnical engineering to ensure the quality and safety of foundations. Insufficient foundation bearing capacity can lead to catastrophic consequences such as shear failure and overall instability. Therefore, bearing capacity testing of treated foundations can comprehensively reflect the overall strength and deformation characteristics of the foundation under stress. Bearing capacity testing has evolved from classic static load tests (high cost and long cycle) to dynamic penetration tests (such as heavy and super-heavy dynamic penetration tests), static penetration tests, plate load tests, and various indirect estimation methods based on wave velocity and deformation modulus.

[0003] Currently, the commonly used methods for testing foundation bearing capacity are the falling weight deflectometer and the dynamic cone penetrator. The dynamic cone penetrator is a device used for rapid on-site measurement of the structural properties of unbonded pavement materials. Its advantages include speed, simplicity, and lack of site limitations, making it suitable for evaluating the bearing capacity of construction sites or existing roadbeds. However, in practical use, it requires manual operation of the drive motor via a handheld power switch, controlling its forward and reverse rotation to raise and lower the suspension rope, thus enabling the falling weight to be lifted and allowed to fall freely. This traditional method is not only time-consuming and labor-intensive, requiring operators to closely monitor the falling weight for extended periods, but also necessitates recording the number of strikes. To improve efficiency, most operators mentally count the blows, which can lead to errors and affect the accuracy of the test results. Therefore, we propose a rapid foundation bearing capacity testing device to address these problems. Summary of the Invention

[0004] In view of this, in order to solve the problems that traditional operation methods are not only time-consuming and labor-intensive, but also rely on manual recording of the number of taps, which is prone to errors and affects the test results, this utility model provides a rapid test device for foundation bearing capacity.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rapid foundation bearing capacity testing device, comprising a base plate, two first support rods symmetrically fixedly connected to the top of the base plate, a V-shaped guide seat fixedly connected to one side of the two first support rods, a conical rod being guided through the top of the V-shaped guide seat, a drop hammer for hammering the conical rod downward into the ground being slidably sleeved on the outer wall of the conical rod, a connecting plate fixedly connected to the top of the two first support rods, a second support rod fixedly connected to the top of the connecting plate, at least one pulley group being rotatably connected to the top of the second support rod through a mounting plate, each pulley group consisting of two symmetrical pulleys, and the same suspension rope being provided on the two pulleys in the same group, one end of the suspension rope being fixedly connected to a connector sleeved on the conical rod, and the connector cooperating with the drop hammer, the other end of the suspension rope being fixedly connected to a movable block, the movable block being vertically guided and slidably disposed above the base plate; It also includes a transmission assembly disposed between the two first support rods and the second support rod, for intermittently abutting the movable block; It also includes a drive assembly, located on top of the base plate, for providing power to the transmission assembly.

[0006] Furthermore, two mounting plates are symmetrically fixedly connected to the top of the second support rod. Each of the two mounting plates is provided with a pulley group. The two pulley groups respectively complete the sliding traction of the two suspension ropes. The two ends of the two suspension ropes are respectively fixedly connected to the connector and the movable block.

[0007] Furthermore, two sliding rods are symmetrically fixedly connected to the top of the base plate, and the top ends of the two sliding rods are fixedly connected to the same fixing block. The fixing block is fixedly connected above one side of the second support rod, and the movable block is slidably sleeved on the two sliding rods.

[0008] Furthermore, the transmission assembly includes two lower fixed plates fixedly connected to one side of the two first support rods, and two upper fixed plates fixedly connected to both sides of the second support rods. The two lower fixed plates are rotatably connected to the same first rotating shaft, and the two upper fixed plates are rotatably connected to the same second rotating shaft. A sprocket is fixedly sleeved on both the first and second rotating shafts, and the same chain is driven sleeved on the two sprockets. At least one pressure block is fixedly connected to the outer surface of the chain, which intermittently abuts against the movable block.

[0009] Furthermore, the drive assembly includes a drive motor fixedly connected to the top of the base plate, one end of the first rotating shaft rotatably passes through one side of one of the lower fixed plates, and synchronous pulleys are fixedly sleeved on both the through end of the first rotating shaft and the output shaft of the drive motor, and the same synchronous belt is driven on the two synchronous pulleys.

[0010] Furthermore, the two first support rods are fixedly connected to the same U-shaped plate on the side near the cone rod. An infrared transmitter is fixedly installed on the inner side of the U-shaped plate near the first support rod, and an infrared receiver corresponding to the infrared transmitter is fixedly installed on the inner side of the U-shaped plate away from the first support rod. A counting panel for use with the infrared receiver is provided on the outer side of the U-shaped plate away from the first support rod.

[0011] The embodiments of this utility model have the following beneficial effects: 1. By starting the drive motor to drive the pressure block to move continuously, the hammer can be repeatedly lifted by cooperating with the movable block. At the same time, with the automatic locking cooperation between the traditional cone head rod, connector and hammer, it can automatically fall after being lifted, thus achieving the effect of automatic repeated hammering. There is no need for the staff to remotely operate the motor repeatedly, saving time and effort and greatly reducing the workload. 2. By setting an infrared counter, a count can be completed when the hammer passes between the infrared transmitter and the infrared receiver, thus enabling automatic recording of the number of strikes without manual recording, ensuring the accuracy of the detection. 3. Through the electrical control coordination between the infrared counter and the drive motor, the drive motor can be automatically shut off after the set number of taps is completed, which further ensures the accuracy of detection, avoids excessive tapping, and also improves the automation level of the entire device.

[0012] This invention enables continuous operation by starting a drive motor, achieving automatic hammer striking. During the automatic striking process, the number of strikes is automatically recorded, and the drive motor is automatically shut off after the set number of strikes is reached. The entire process is simple to operate, saves time and effort, requires no human intervention, and has a high degree of automation. This not only reduces workload but also ensures detection accuracy.

[0013] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a first-view schematic diagram of the overall structure of a rapid detection device for foundation bearing capacity according to this utility model. Figure 2This is a second-view schematic diagram of the overall structure of a rapid detection device for foundation bearing capacity according to this utility model; Figure 3 This is a schematic diagram of the transmission structure between the hoisting rope and the drive mechanism; Figure 4 This is a schematic diagram of the connection structure between the first support rod and the second support rod.

[0015] In the diagram: 1. Base plate; 2. First support rod; 3. Connecting plate; 4. Second support rod; 5. Conical rod; 6. Drop hammer; 7. Mounting plate; 8. V-shaped guide seat; 9. Connector; 10. Drive motor; 11. Pulley; 12. Lifting rope; 13. Lower fixed plate; 14. Sliding rod; 15. Synchronous pulley; 16. Upper fixed plate; 17. Movable block; 18. First rotating shaft; 19. Fixed block; 20. Second rotating shaft; 21. Sprocket; 22. Chain; 23. Pressure block; 24. Synchronous belt; 25. U-shaped plate; 26. Infrared transmitter; 27. Counting panel; 28. Infrared receiver. Detailed Implementation

[0016] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0017] Example 1: Please refer to Figures 1-4 This embodiment provides a rapid foundation bearing capacity testing device, including a base plate 1. Two first support rods 2 are symmetrically fixed to the top of the base plate 1 via bolts. A V-shaped guide seat 8 is fixedly connected to the lower position of the two first support rods 2 on the same side. A conical rod 5 is guided through the top of the V-shaped guide seat 8 for foundation insertion testing. A drop hammer 6 is slidably fitted onto the outer wall of the conical rod 5 for hammering the conical rod 5 downwards into the ground. The bottom end of the conical rod 5 is a 60° conical head with a cone diameter of 20mm. A guide rod is integrally formed at the top of the conical head, comprising multiple guide sections of different diameters (this is prior art and will not be described in detail here). A hammer disc is fixedly welded to the outer wall of the guide rod. The drop hammer 6 slides downwards on the guide rod, striking the hammer disc to move the entire conical rod 5 downwards and insert it into the ground. A drop hammer 6 of a certain weight (usually 8kg) is dropped freely from a certain height (usually 575mm). After multiple blows, the penetration depth of the cone rod 5 is directly read, thus completing the rapid detection of the compaction degree and bearing capacity of the foundation.

[0018] The top ends of the two first support rods 2 are fixedly connected to the same connecting plate 3. The top of the connecting plate 3 is fixedly connected to the second support rod 4. The top ends of the second support rod 4 are symmetrically fixedly connected to two mounting plates 7. Each mounting plate 7 is equipped with a pulley group, and each pulley group consists of two symmetrical pulleys 11. The two pulleys 11 in the same group are equipped with the same suspension rope 12. The pulleys 11 can provide a sliding traction effect on the suspension rope 12. One end of the two suspension ropes 12 is fixedly connected to the same connector 9. The connector 9 is sleeved on the conical rod 5. The connector 9 is equipped with a locking device that automatically engages with the drop hammer 6. (The locking device is an elastic locking device, which is also a prior art in this field and will not be described in detail here.) When connector 9 aligns with drop hammer 6, it automatically engages and positions itself. As the hoisting rope 12 lifts connector 9, it drives drop hammer 6 to move upwards synchronously on the conical rod 5. When connector 9 passes through the transition section, the diameter of the upper part of the conical rod 5 gradually decreases, causing connector 9 to automatically disengage from drop hammer 6. At this point, drop hammer 6 slides downwards on the conical rod 5, achieving a striking effect. Subsequently, connector 9 moves downwards again, simultaneously pulling the hoisting rope 12. The guide rope on the conical rod 5 guides connector 9 downwards, enabling it to re-engage and position itself with drop hammer 6.

[0019] Two sliding rods 14 are symmetrically fixedly connected to the top of the base plate 1. The top of each sliding rod 14 is fixedly connected to the same fixing block 19, which is fixedly connected above one side of the second support rod 4. The same movable block 17 is slidably fitted onto each of the two sliding rods 14, and the other ends of both suspension ropes 12 pass through the fixing block 19 and are fixedly connected to the top of the movable block 17. The movable block 17 can guide the sliding of the two sliding rods 14 up and down, and simultaneously guide the movement of the suspension ropes 12, thereby improving the overall stability of the movement.

[0020] Each of the two first support rods 2 has a lower fixing plate 13 fixedly connected to the side away from the V-shaped guide seat 8. The two lower fixing plates 13 are rotatably connected to the same first rotating shaft 18. Each of the second support rods 4 has an upper fixing plate 16 fixedly connected to the side away from each other. The two upper fixing plates 16 are rotatably connected to the same second rotating shaft 20. A sprocket 21 is fixedly sleeved on both the first rotating shaft 18 and the second rotating shaft 20. The same chain 22 is driven and sleeved on the two sprockets 21. At least one pressure block 23 is fixedly connected to the outer surface of the chain 22, which intermittently abuts against the top of the movable block 17. A drive motor 10 is fixedly installed on the top of the base plate 1. One end of the first rotating shaft 18 rotatably passes through one side of one of the lower fixing plates 13. Synchronous pulleys 15 are fixedly sleeved on both the through end of the first rotating shaft 18 and the output shaft of the drive motor 10. The same synchronous belt 24 is driven and sleeved on the two synchronous pulleys 15.

[0021] During operation, the drive motor 10 is started first, which drives the first rotating shaft 18 to rotate via the synchronous belt 24. This, in turn, drives the chain 22 via the sprocket 21 for transmission and conveying, thereby moving the pressure block 23. When the pressure block 23 moves to contact the top of the movable block 17, as... Figure 1 , Figure 2 As shown, at this time, the connector 9 and the drop hammer 6 are in a locked state. When the pressure block 23 moves downward with the chain 22, it can drive the movable block 17 to move downward synchronously. Then, the suspension rope 12 can drive the connector 9 to move upward, thereby driving the drop hammer 6 to move upward. When it moves to a certain height, the connector 9 and the drop hammer 6 automatically disengage, and the drop hammer 6 automatically falls to complete the strike. At the same time, the pressure block 23 continues to drive the movable block 17 to move downward a short distance, while the connector 9 continues to move upward. When the pressure block 23 moves to the bottom of the entire chain 22 and moves in an arc, it will slowly disengage from the movable block 17. After the movable block 17 is released from the force, it will automatically fall under the weight of the connector 9 itself, and the suspension rope 12 will drive the movable block 17 to move upward on the slide bar 14 to reset. After the connector 9 falls, it will automatically lock with the drop hammer 6 again. As the chain 22 continues to convey the material, the pressure block 23 will once again contact the top of the movable block 17, thereby automatically lifting the drop hammer 6 again. With this design, there is no need for manual hand-held remote control operation of the drive motor 10 to retract and extend the line each time. The continuous operation of the drive motor 10 can achieve repeated striking of the drop hammer 6. The operator only needs to record the number of strikes, making the operation easier and more convenient for the operator.

[0022] In addition, to improve work efficiency, two pressure blocks 23 can be evenly distributed on the outer surface of the chain 22. By alternating between the two pressure blocks 23 and the movable block 17, it is not necessary to wait for a pressure block 23 to rotate a full circle before it comes into contact with the movable block 17, thereby effectively increasing the frequency of the hammer 6 striking and improving construction efficiency.

[0023] This utility model can be used in the field of construction engineering, and can also be applied to other fields.

[0024] Example 2: This example is a further improvement on the previous example: as follows Figures 1-4As shown, the two first support rods 2 are fixedly connected to the same U-shaped plate 25 on the side near the conical rod 5. An infrared transmitter 26 is fixedly installed on the inner side of the U-shaped plate 25 near the first support rod 2. An infrared receiver 28 corresponding to the infrared transmitter 26 is fixedly installed on the inner side of the U-shaped plate 25 away from the first support rod 2. A counting panel 27 for use with the infrared receiver 28 is provided on the outer side of the U-shaped plate 25 away from the first support rod 2. By setting an infrared counter, the infrared light can be blocked once when the hammer 6 moves up and down between the infrared transmitter 26 and the infrared receiver 28, thus completing the count. In other words, two counts are completed during the hammer 6's up-and-down movement to complete one strike. When counting the number of strikes, the even number displayed on the counting panel 27 can be divided by 2 to calculate the total number of strikes. Furthermore, by electrically controlling the drive motor 10, the system can be set so that the drive motor 10 automatically stops working after a certain number of strikes is reached. This not only eliminates the trouble of manual recording but also avoids errors that can affect the detection results, thereby improving the accuracy of the detection.

[0025] It should also be noted that when the hammer 6 strikes the cone-shaped rod 5 and moves downwards, the height of each strike changes, thus changing the height of the hammer 6 relative to the ground to ensure a consistent striking height each time. Because the cone-shaped rod 5 is designed to be relatively tall, and the pressure block 23 moves the movable block 17 downwards at the same height each time, the suspension rope 12 moves the connector 9 upwards to the same height each time. However, even as the cone-shaped rod 5 moves downwards and its height gradually decreases, the connector 9 will not disengage from the cone-shaped rod 5. This ensures that the hammer 6 always passes between the infrared transmitter 26 and the infrared receiver 28, thus enabling counting each time.

[0026] However, as is well known to those skilled in the art, the working principles and wiring methods of the drive motor 10, infrared transmitter 26 and infrared receiver 28 are commonplace and are all conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model 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 solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A rapid foundation bearing capacity testing device, comprising a base plate (1), two first support rods (2) are symmetrically fixedly connected to the top of the base plate (1), a V-shaped guide seat (8) is fixedly connected to one side of the two first support rods (2), a conical rod (5) is guided through the top of the V-shaped guide seat (8), a drop hammer (6) for hammering the conical rod (5) downward into the ground is slidably sleeved on the outer wall of the conical rod (5), a connecting plate (3) is fixedly connected to the top of the two first support rods (2), a second support rod (4) is fixedly connected to the top of the connecting plate (3), at least one pulley group is rotatably connected to the top of the second support rod (4) through a mounting plate (7), each pulley group consists of two symmetrical pulleys (11), and the two pulleys (11) in the same group are provided with the same suspension rope (12), one end of the suspension rope (12) is fixedly connected to a connector (9) sleeved on the conical rod (5), and the connector (9) is used in conjunction with the drop hammer (6), characterized in that, The other end of the suspension rope (12) is fixedly connected to a movable block (17), which is vertically guided and slidably disposed above the base plate (1); It also includes a transmission assembly, located between the two first support rods (2) and the second support rod (4), for intermittently abutting the movable block (17); It also includes a drive assembly located on top of the base plate (1) for providing power to the transmission assembly.

2. The rapid testing device for foundation bearing capacity as described in claim 1, characterized in that, The top of the second support rod (4) is symmetrically fixedly connected to two mounting plates (7). Each of the two mounting plates (7) is provided with a pulley group. The two pulley groups respectively complete the sliding traction of the two suspension ropes (12). The two ends of the two suspension ropes (12) are respectively fixedly connected to the connector (9) and the movable block (17).

3. A rapid testing device for foundation bearing capacity as described in claim 1 or 2, characterized in that, The top of the base plate (1) is symmetrically fixedly connected to two slide rods (14), and the top ends of the two slide rods (14) are fixedly connected to the same fixing block (19). The fixing block (19) is fixedly connected above one side of the second support rod (4), and the movable block (17) is slidably sleeved on the two slide rods (14).

4. The rapid testing device for foundation bearing capacity as described in claim 3, characterized in that, The transmission assembly includes two lower fixing plates (13) fixedly connected to one side of the two first support rods (2), and two upper fixing plates (16) fixedly connected to both sides of the second support rod (4). The two lower fixing plates (13) are rotatably connected to the same first rotating shaft (18), and the two upper fixing plates (16) are rotatably connected to the same second rotating shaft (20). Both the first rotating shaft (18) and the second rotating shaft (20) are fixedly fitted with sprockets (21). The two sprockets (21) are driven by the same chain (22). At least one pressure block (23) that intermittently abuts against the movable block (17) is fixedly connected to the outer surface of the chain (22).

5. The rapid testing device for foundation bearing capacity as described in claim 4, characterized in that, The drive assembly includes a drive motor (10) fixedly connected to the top of the base plate (1). One end of the first rotating shaft (18) rotates through one side of a lower fixed plate (13). The through end of the first rotating shaft (18) and the output shaft of the drive motor (10) are both fixedly fitted with synchronous pulleys (15). The two synchronous pulleys (15) are fitted with the same synchronous belt (24).

6. The rapid testing device for foundation bearing capacity as described in claim 5, characterized in that, Two first support rods (2) are fixedly connected to the same U-shaped plate (25) on the side near the cone rod (5). An infrared emitter (26) is fixedly installed on the inner side of the U-shaped plate (25) near the first support rod (2). An infrared receiver (28) corresponding to the infrared emitter (26) is fixedly installed on the inner side of the U-shaped plate (25) away from the first support rod (2). A counting panel (27) for use with the infrared receiver (28) is provided on the outer side of the U-shaped plate (25) away from the first support rod (2).

Images