Foundation hardness detection device

Abstract

The application relates to the technical field of foundation hardness detection, and discloses a foundation hardness detection device, which comprises a support, fixed angle bases are arranged at the top corners of the support, a second rotating rod is rotationally connected between the fixed angle bases, a connecting block is threadedly connected to each second rotating rod, a first rotating rod is inserted into one connecting block, a fourth hydraulic telescopic rod is rotationally connected to the middle of the first rotating rod, a driving plate is fixedly connected to the bottom of the fourth hydraulic telescopic rod, and a plurality of second springs are fixedly connected to the bottom of the driving plate. In the process of lifting the lifting column, the pressure identifier is contacted, identification of the ground pressure is performed at any time, a distance scale is arranged on the side of the pressure identifier, the lifting height of the ground soil in the test area is read out when each pressure plate is lifted, and whether the earth surface in the area is backfilled flat or inclined is judged.

Description

A foundation hardness testing device Technical Field

[0001] This invention relates to the field of foundation hardness testing technology, specifically to a foundation hardness testing device. Background Technology

[0002] A foundation pit is a pit excavated at the foundation design location according to the foundation elevation and foundation plan dimensions.

[0003] During civil engineering construction, earth and rock fill is used to fill foundations or other areas. After the filling is completed, the foundation needs to be tested to determine if its load-bearing capacity is the same as that of the roadbed. This is to prevent differences in bearing capacity between the fill and the roadbed from causing height differences that could affect the stability of the roadbed. Current foundation strength testing typically involves driving a probe into the foundation and recording the number of hammer blows required to drive the probe to a certain depth. However, this method usually requires manual operation of holding the probe and lifting the hammer, which is inconvenient and prone to causing injury to workers if errors occur. Therefore, current foundation testing is complex and cannot be conveniently and efficiently performed. Furthermore, the pressure load test is conducted separately, making it difficult to intuitively judge the degree of pressure and resulting in small fluctuations in the pressure load parameters that are hard to distinguish. To address these issues, we propose a foundation hardness testing device. Summary of the Invention

[0004] The purpose of this invention is to provide a foundation hardness testing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a foundation hardness testing device, comprising a support frame, wherein fixed corner seats are fixedly installed at the top corners of the support frame, a second rotating rod is rotatably connected between a pair of fixed corner seats, a connecting block is threaded onto each of the second rotating rods, a first rotating rod is inserted through one of the connecting blocks, a fourth hydraulic telescopic rod is rotatably connected to the middle of the first rotating rod, a drive plate is fixedly connected to the bottom of the fourth hydraulic telescopic rod, a plurality of second springs are fixedly connected to the bottom of the drive plate, a pressure plate is suspended from the bottom of the plurality of second springs, a plurality of lifting columns are fixedly installed on the top of the drive plate, and a plurality of pressure markers are fixedly installed on the top of the drive plate, with each pressure marker corresponding to a lifting column; a plurality of rheostats are fixedly installed around the fourth hydraulic telescopic rod near the lifting columns, the rheostats and the lifting columns are slidably engaged, and the drive plate... Each corner is equipped with a protective cover. An electromagnet is fixedly installed at the top of the protective cover. A first spring is suspended from the bottom of the electromagnet. A magnetic block is suspended from the bottom of the first spring. A stop block is fixedly connected to the bottom of the magnetic block. A sliding rod is fixedly installed in the middle of the bottom of the electromagnet. A hitting ball is slidably connected to the sliding rod. The hitting ball and the stop block are fixedly connected. The bottom of the stop block is rounded. Electric push rods are installed around the drive plate. The movable rod of the electric push rod extends into the interior of the drive plate and is fixedly connected to a wedge at one end. The wedge and the bottom of the stop block fit together. First hydraulic telescopic rods are fixedly installed around the bottom of the bracket. A bow bridge is installed on the top of the bracket. A camera probe is fixedly installed in the middle of the bow bridge. A balancer for testing the ground level is fixedly installed on the top of the fourth hydraulic telescopic rod. When the stator of the balancer is in the middle, the movable rods of the multiple first hydraulic telescopic rods are at the same height.

[0006] Preferably, the balancer includes a square box fixed to the top of the fourth hydraulic telescopic rod, and a stator ball movable inside the square box, the stator ball rolling inside the square box, and the irradiation surface of the camera probe coinciding with the top of the square box.

[0007] Preferably, a fixing rod is connected to one side of the bracket, the fixing rod passes through another connecting block, a sinking plate is fixedly installed at the end of the fixing rod away from the bracket, a light sensor is slidably connected to the bottom of the sinking plate, an extension plate is fixedly connected to one side of the bottom of the sinking plate, a third hydraulic telescopic rod is connected between the extension plate and the light sensor, an adjustment block is installed at the top of each corner of the pressure plate, a motor is fixedly installed at each corner of the fourth hydraulic telescopic rod, and an arc plate is fixedly installed on the output shaft of the motor.

[0008] Preferably, the arc-shaped sheet is made of a variable-diameter spiral metal sheet, and the arc-shaped sheet is inserted into the bottom of the adjusting block by rotating the motor shaft to drive the pressure plate to rise and fall.

[0009] Preferably, mounting plates are installed at the bottom center of both sides of the bracket, and a second hydraulic telescopic rod is fixedly installed on one side of each mounting plate, with a roller assembly fixedly installed at the bottom of the second hydraulic telescopic rod.

[0010] Preferably, both the drive plate and the pressure plate are made of lightweight composite materials, and the bottom of the pressure plate has an anti-slip surface.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] This invention utilizes a drive plate installed at the bottom of the fourth hydraulic telescopic rod. As the drive plate descends, it simultaneously drives the pressure plate downwards. During the descent of the pressure plate, as it contacts the ground, it causes the lifting column to rise with a significant sliding distance. As the lifting column rises, it contacts the pressure indicator, facilitating continuous identification of the ground pressure. The identification is simple and easy to understand. Simultaneously, the pressure indicator has a distance scale on its side that allows for easy reading of the soil rise height of the test area when each pressure plate rises, aiding in the determination of whether the soil surface in that area is backfilled evenly or tilted.

[0013] After the pressure plate contacts the ground, if the pressure plate compresses the second spring to its limit, the moving distance of the lifting column increases, which in turn increases the moving distance of the sliding plate on it. The resistance of the rheostat decreases, the magnetism of the electromagnet strengthens, and the repulsive force transmitted between the electromagnet and the magnetic block increases. Therefore, during the continuous output of the fourth hydraulic telescopic rod, the downward energy stored in the magnetic block increases step by step. After the fourth hydraulic telescopic rod stops outputting at a certain time, the electric push rod retracts, the magnetic block contacts the restraint, and the electromagnet drives the ball to hit the ground to test the surface hardness of the ground. The overall operation is simple and requires no manual intervention. Attached Figure Description

[0014] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 is an enlarged structural schematic diagram of point A in Figure 1 of the present invention;

[0016] Figure 3 is a schematic diagram of the entire invention from another perspective;

[0017] Figure 4 is an enlarged structural schematic diagram of point B in Figure 3 of the present invention;

[0018] Figure 5 is an enlarged structural schematic diagram of point C in Figure 4 of the present invention;

[0019] Figure 6 is a schematic diagram of the disassembled structure of the drive plate and pressure plate of the present invention;

[0020] Figure 7 is a schematic diagram of the support structure of the present invention;

[0021] Figure 8 is a schematic diagram of the cooperation structure between the motor and the adjusting block of the present invention.

[0022] In the diagram: 1-Bracket; 2-Fixed Angle Seat; 3-First Rotating Rod; 4-Second Rotating Rod; 5-First Hydraulic Telescopic Rod; 6-Mounting Plate; 7-Second Hydraulic Telescopic Rod; 8-Roller Assembly; 9-Bow Bridge; 10-Camera Probe; 11-Balancer; 12-Sinking Plate; 13-Extension Plate; 14-Light Sensor; 15-Third Hydraulic Telescopic Rod; 16-Connecting Block; 17-Fourth Hydraulic Telescopic Rod; 18-Drive Plate; 19-Pressure Plate; 20-Rheostat; 21-Pressure Marker; 22-Protective Cover; 23-Electric Push Rod; 24-Motor; 25-Electromagnet; 26-Striking Ball; 27-Support Block; 28-Magnetic Block; 29-Wedge Block; 30-First Spring; 31-Second Spring; 32-Adjusting Block; 33-Lifting Column; 34-Arc Plate. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please refer to Figures 1-8. This invention provides a technical solution: a foundation hardness testing device, comprising a support 1. Fixed corner brackets 2 are fixedly installed at the top corners of the support 1. A second rotating rod 4 is rotatably connected between a pair of fixed corner brackets 2. A connecting block 16 is threaded onto each of the second rotating rods 4. A first rotating rod 3 is inserted through one of the connecting blocks 16. A fourth hydraulic telescopic rod 17 is rotatably connected to the middle of the first rotating rod 3. A drive plate 18 is fixedly connected to the bottom of the fourth hydraulic telescopic rod 17. A plurality of second springs 31 are fixedly connected to the bottom of the drive plate 18. A pressure plate 19 is suspended from the bottom of the plurality of second springs 31. A pressure plate 19 is fixedly mounted on the top of the drive plate 18. The device is equipped with multiple lifting columns 33. Multiple pressure markers 21 are fixedly mounted on the top of the drive plate 18. These pressure markers 21 are existing technology, similar to strain gauge pressure sensors, electronic sensors that measure pressure by measuring the strain of an elastic element. Each pressure marker 21 corresponds one-to-one with a lifting column 33. A distance test scale is also installed on the side of each pressure marker 21, and a sliding plate (shown in Figure 2, the distance test scale is marked) is installed on each lifting column 33. Personnel can observe the position of the sliding plate on the distance test scale, providing an auxiliary observation effect and a direct way to detect whether the foundation is uneven. When the device is in use… The device can be placed on the foundation using a crane. Then, the first rotating rod 3 and the second rotating rod 4 are manually rotated. The second rotating rod 4 rotates between the two fixed angle seats 2. The first rotating rod 3 and the connecting block 16 are threaded together, causing the fourth hydraulic telescopic rod 17 to move. When the fourth hydraulic telescopic rod 17 is above the foundation, the movable rod of the fourth hydraulic telescopic rod 17 is lowered manually. During the descent, the drive plate 18 is lowered. When the pressure plate 19 contacts the ground, the movable rod of the fourth hydraulic telescopic rod 17 continues to descend. When the second spring 31 is compressed, the pressure indicator 21 begins to increase. 17. The speed continues to decrease steadily until the second spring 31 is compressed to its limit. At this point, the pressure indicator 21 reads half of the total pressure. Therefore, the pressure is calculated by subtracting the spring force of the second spring 31 from the pressure indicator 21 reading to ensure accuracy. When the second spring 31 is compressed, the sliding plate is located at a certain point on the distance test scale, allowing the depth of compression of the pressure plate 19 to be known. If the parameters on each distance test scale of the multiple pressure indicators 21 on the drive plate 18 are different, the pressure plate 19 may be in a tilted state, indicating that the foundation in that area is uneven. Therefore, backfilling is required according to the construction requirements.

[0025] Furthermore, multiple rheostats 20 are fixedly installed around the fourth hydraulic telescopic rod 17 near the lifting column 33. The rheostats 20 and the lifting column 33 are slidably engaged. Protective covers 22 are installed at the top corners of the drive plate 18. Electromagnets 25 are fixedly installed inside the top of the protective covers 22. A first spring 30 is suspended from the bottom of the electromagnet 25. A magnetic block 28 is suspended from the bottom of the first spring 30. A stop block 27 is fixedly connected to the bottom of the magnetic block 28. A sliding rod is fixedly installed in the middle of the bottom of the electromagnet 25. A striking ball 26 is slidably connected to the sliding rod. The striking ball 26 and the stop block 27 are fixedly connected. When the pressure plate 19 descends and contacts the foundation, the pressure plate 19 compresses the second spring 31, and then presses... As the pressure plate 19 rises, it causes the lifting column 33 to slide upwards. The sliding plate slides on the rheostat 20. The sliding plate and the electromagnet 25 are electrically connected. The sliding plate causes the overall resistance of the rheostat 20 to decrease when the rheostat 20 is at its highest position, which increases the current supplied to the electromagnet 25. Therefore, the magnetic energy required by the electromagnet 25 is enhanced. When it is necessary to test a certain point area on the foundation, the magnetic block 28 with opposite magnetic properties is driven by the magnetic drive at the bottom of the electromagnet 25 to move downwards. When the magnetic block 28 descends, it causes the first spring 30 to be stretched, and at the same time, it causes the stop block 27 and the striking ball 26 to descend on the sliding rod, so that the striking ball 26 impacts the ground to test the hardness and strength of the compacted foundation surface.

[0026] Furthermore, the bottom of the abutment block 27 is rounded, and electric push rods 23 are installed around the drive plate 18. The movable rod of the electric push rod 23 extends into the drive plate 18, and a wedge block 29 is fixedly connected to one end of it. The wedge block 29 and the bottom of the abutment block 27 fit together. The movable rod of the electric push rod 23 initially extends out, causing the wedge block 29 and the bottom of the abutment block 27 to abut against each other. When the current supplied to the electromagnet 25 increases, the wedge block 29 limits the abutment block 27, preventing the ball 26 from directly impacting the ground. This makes the ball 26 feel powerless when hitting the ground. Because the current flowing through the electromagnet 25 increases gradually, the above problem is solved by temporarily locking the stop block 27 with the wedge block 29. When the moving rod of the electric push rod 23 retracts quickly, the magnetic block 28 will quickly drive the ball 26 to strike the ground, which is convenient for testing the strength of the ground foundation. After the ball 26 strikes the ground, the current is turned off, the first spring 30 is stretched and will return to its original position, and the ball 26 will rise to near its initial position. Since the bottom of the stop block 27 is rounded, it is convenient for the wedge block 29 to be squeezed in. Afterwards, the moving rod of the electric push rod 23 is driven to return to its original position, which can lock the stop block 27 and the ball 26.

[0027] Furthermore, first hydraulic telescopic rods 5 are fixedly installed around the bottom of the support 1, a bow bridge 9 is installed on the top of the support 1, a camera probe 10 is fixedly installed in the middle of the bow bridge 9, and a balancer 11 for testing ground levelness is fixedly installed on the top of the fourth hydraulic telescopic rod 17. The balancer 11 includes a square box fixed to the top of the fourth hydraulic telescopic rod 17 and a stator ball that moves inside the square box. The stator ball rolls inside the square box, and the irradiation surface of the camera probe 10 coincides with the top of the square box. When the stator ball of the balancer 11 is in the middle, the multiple moving rods of the first hydraulic telescopic rods 5 are at the same height. When the device is located on the foundation, the unevenness of the foundation itself may cause the entire device to tilt, thereby causing the fourth hydraulic telescopic rod 17 to tilt. The descent causes inaccurate test readings. Therefore, a leveling process is required when the device is in use. This is monitored manually in the background using a camera probe 10. If the stator ball is not in the center of the square box, the bracket 1 is tilted and leveling is required. This is done by adjusting the micro-lifting of each of the first hydraulic telescopic rods 5 inserted into the foundation. The manual monitoring continues until the stator ball is in the center of the square box. Once leveling is successful, the device can be put into use.

[0028] Specifically, a fixing rod is connected to one side of the bracket 1, and the fixing rod passes through another connecting block 16. A sinking plate 12 is fixedly installed at the end of the fixing rod away from the bracket 1. A light sensor 14 is slidably connected to the bottom of the sinking plate 12. An extension plate 13 is fixedly connected to one side of the bottom of the sinking plate 12. A third hydraulic telescopic rod 15 is connected between the extension plate 13 and the light sensor 14. Adjustment blocks 32 are installed at the top corners of the pressure plate 19. A motor 2 is fixedly installed at the corners of the fourth hydraulic telescopic rod 17. 4. The output shaft of the motor 24 is fixedly mounted with an arc-shaped plate 34. The arc-shaped plate 34 is made of a variable-diameter spiral metal sheet. Metal sheets are used because they possess a certain rigidity, ensuring long-term use and increasing the service life of this component. The arc-shaped plate 34 rotates along the motor 24 shaft and cuts into the bottom of the adjusting block 32, thereby driving the pressure plate 19 to rise and fall. During long-term use of the pressure plate 19, depending on the soil conditions (such as high humidity and slope), soil may accumulate due to the holes on the pressure plate 19 that allow the ball 26 to pass through. If the pressure plate 19 gets stuck in the aperture during the downward pressing process, the increased weight at the top of the pressure plate 19 may cause it to tilt in a certain direction. Therefore, after the pressure plate 19 has completed testing a certain area of ​​the foundation, the fourth hydraulic telescopic rod 17 should be reset, and the third hydraulic telescopic rod 15 should move continuously. As the third hydraulic telescopic rod 15 moves, it drives the light sensor 14 to move. When the light sensor 14 is in the initial position of the pressure plate 19, it illuminates the bottom of the pressure plate 19. If the pressure plate 19 tilts, the light sensor 14 will form a blocking surface as it moves, thus sending a report to the backend. After receiving the instruction, the backend will drive a motor 24 to rotate. When the motor 24 rotates, it will drive the arc plate 34 to cut into the bottom of the adjustment block 32. The arc surface of the adjustment block 32 will control the lifting distance of the adjustment block 32. If no alarm is generated when the light sensor 14 moves back and forth and emits laser, the pressure plate 19 is in a flat state and can continue to be used. After use, the clay on the pressure plate 19 can be cleaned manually.

[0029] Mounting plates 6 are installed at the bottom center of both sides of the bracket 1. A second hydraulic telescopic rod 7 is fixedly installed on one side of each mounting plate 6. A roller assembly 8 is fixedly installed at the bottom of the second hydraulic telescopic rod 7. The device can also be transported by the roller assembly 8, which facilitates the transfer and delivery of the device. When the device needs to work, the movable rod of the second hydraulic telescopic rod 7 is initially in the retracted state. If the device needs to be transported, the movable rod of the second hydraulic telescopic rod 7 can be lowered, and the movable rod of the first hydraulic telescopic rod 5 can be retracted, so that the rollers on the roller assembly 8 contact the ground.

[0030] When the device is working, it drives the second hydraulic telescopic rod 7 to rise, while the first hydraulic telescopic rod 5 descends to contact the foundation. Then, by manually rotating the first rotating rod 3 and the second rotating rod 4, the pressure plate 19 is positioned above the foundation to determine a certain location. Afterward, the fourth hydraulic telescopic rod 17 is driven to descend, causing the pressure plate 19 to descend as well. After the pressure plate 19 contacts the ground during its descent, it drives the lifting column 33 to rise. During the ascent of the lifting column 33, the sliding plate moves synchronously and contacts the pressure marker 21, recording the load force on the ground surface. During this process, the sliding plate and the rheostat 20 cooperate, causing the resistance of the rheostat 20 to decrease, the magnetism of the electromagnet 25 to increase, and the magnetic block 28 to obtain driving force. After the electric push rod 23 retracts, the magnetic block 28 drives the ball 26 to rush towards the ground surface to test the structural hardness of the ground surface. When the device is removed from the ground after the operation, the ground condition can be observed manually. The operation is simple, requires little manual intervention, and the test is relatively accurate.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A foundation hardness testing device, comprising a support (1), characterized in that: Fixed corner brackets (2) are fixedly installed at the top corners of the bracket (1). A second rotating rod (4) is rotatably connected between a pair of fixed corner brackets (2). A connecting block (16) is threaded onto each of the second rotating rods (4). A first rotating rod (3) is inserted through one of the connecting blocks (16). A fourth hydraulic telescopic rod (17) is rotatably connected to the middle of the first rotating rod (3). A drive plate (18) is fixedly connected to the bottom of the fourth hydraulic telescopic rod (17). A plurality of second springs (31) are fixedly connected to the bottom of the drive plate (18). A pressure plate (19) is suspended at the bottom of the spring (31). Multiple lifting columns (33) are fixedly installed on the top of the drive plate (18). Multiple pressure markers (21) are fixedly installed on the top of the drive plate (18), and each pressure marker (21) corresponds to a lifting column (33). Multiple rheostats (20) are fixedly installed around the fourth hydraulic telescopic rod (17) near the lifting column (33). The rheostats (20) and the lifting column (33) slide together. Protective covers (22) are installed at the top corners of the drive plate (18). An electromagnet (25) is fixedly installed at the top of the drive plate (18). A first spring (30) is suspended from the bottom of the electromagnet (25). A magnetic block (28) is suspended from the bottom of the first spring (30). A stop block (27) is fixedly connected to the bottom of the magnetic block (28). A sliding rod is fixedly installed in the middle of the bottom of the electromagnet (25). A hitting ball (26) is slidably connected to the sliding rod. The hitting ball (26) and the stop block (27) are fixedly connected. The bottom of the stop block (27) is rounded. Electric push rods (23) are installed around the drive plate (18). The movable rod extends into the drive plate (18) and is fixedly connected to a wedge (29) at one end. The wedge (29) and the bottom of the abutment (27) fit together. The bracket (1) is fixedly installed with first hydraulic telescopic rods (5) around its bottom. The bracket (1) is installed with a bow bridge (9) at its top. The bow bridge (9) is fixedly installed with a camera probe (10) in the middle. The fourth hydraulic telescopic rod (17) is fixedly installed with a balancer (11) for testing the levelness of the ground. When the stator of the balancer (11) is in the middle, the movable rods of the multiple first hydraulic telescopic rods (5) are at the same height.

2. The foundation hardness testing device according to claim 1, characterized in that: The balancer (11) includes a square box fixed to the top of the fourth hydraulic telescopic rod (17) and a stator ball moving inside the square box, the stator ball rolling inside the square box, and the irradiation surface of the camera probe (10) coinciding with the top of the square box.

3. The foundation hardness testing device according to claim 1, characterized in that: A fixed rod is connected to one side of the bracket (1), and the fixed rod passes through another connecting block (16). A sinking plate (12) is fixedly installed at the end of the fixed rod away from the bracket (1). A light sensor (14) is slidably connected to the bottom of the sinking plate (12). An extension plate (13) is fixedly connected to one side of the bottom of the sinking plate (12). A third hydraulic telescopic rod (15) is connected between the extension plate (13) and the light sensor (14). An adjustment block (32) is installed at the top of the corner of the pressure plate (19). A motor (24) is fixedly installed at the corner of the fourth hydraulic telescopic rod (17). An arc plate (34) is fixedly installed on the output shaft of the motor (24).

4. The foundation hardness testing device according to claim 3, characterized in that: The arc plate (34) is made of a variable diameter spiral metal plate, and the arc plate (34) is rotated into the bottom of the adjustment block (32) by the motor (24) shaft to drive the pressure plate (19) to rise and fall.

5. The foundation hardness testing device according to claim 1, characterized in that: Mounting plates (6) are installed at the bottom center of both sides of the bracket (1). A second hydraulic telescopic rod (7) is fixedly installed on one side of each mounting plate (6). A roller assembly (8) is fixedly installed at the bottom of the second hydraulic telescopic rod (7).

6. The foundation hardness testing device according to claim 1, characterized in that: The drive plate (18) and pressure plate (19) are both made of lightweight composite materials, and the bottom of the pressure plate (19) is an anti-slip surface.

Images