Foundation bearing capacity testing device for concrete plant

Abstract

The invention discloses a foundation bearing capacity testing device for a concrete plant. The foundation bearing capacity testing device comprises a foundation box, an annular track, a hoisting module, a detection module, a positioning guide module and a driving module, the foundation box is an annular box body, and the annular track is also annular and is fixed on the foundation box; two driving modules are arranged on the annular track, a supporting column is arranged on each driving module, a hoisting module is arranged between the two supporting columns, and a pressure block is connected to the hoisting module; the annular track, the driving module and the hoisting module are matched to hoist the pressure block to carry out a static pressure test on an area to be tested; and the pressure block in the high altitude falls off to carry out a hammering test on the to-be-tested area. According to the device, a balancing weight does not need to be stacked above the device, and a static pressure test and a hammering test can be completed.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation bearing capacity testing, and in particular to a foundation bearing capacity testing device for a concrete plant. Background Art

[0002] In the field of construction engineering, the foundation, as the basic supporting structure of a building, has a bearing capacity that is directly related to the safety and stability of the entire building. This is especially true for buildings such as concrete plants that have heavy loads and extremely high requirements for foundation stability. Accurately testing the foundation's bearing capacity is a key link in ensuring project quality. The Standard Penetration Test (SPT) is a widely used method for testing foundation bearing capacity. It indirectly reflects the foundation's bearing capacity by driving a probe into the foundation and recording the number of blows required to reach a specific depth. During this testing process, hammering is an important means of determining the mechanical properties of the foundation. Simultaneously, static pressure testing, which measures the maximum static pressure the ground surface can withstand, further supplements and verifies the foundation's bearing capacity parameters. The combination of these two methods allows for a more comprehensive assessment of foundation conditions.

[0003] Patent publication number CN208668482U discloses a foundation bearing capacity testing device consisting primarily of a secondary beam, a loading beam, anchor blocks, a connecting chain, connectors, test piles, and jacks. The device is structured as follows: the top of the secondary beam is used to hold the pile load, which is then placed atop the loading beam. The loading beam is then placed atop the jack, which is then placed atop the test pile. Two anchor blocks are symmetrically positioned, one at each end of the loading beam. The connecting chain is connected to the anchor blocks at one end and to the steel bars of the anchor piles at the other end via a connector. However, when applying the above-mentioned existing technology to the foundation bearing capacity test of concrete plants, there are obvious defects and limitations. On the one hand, when the device is testing, a large number of counterweights need to be stacked on top of the secondary beam to achieve the loading purpose. These counterweights are usually very heavy, and not only are the handling and stacking processes cumbersome and laborious, consuming a lot of manpower, material resources and time costs, but the accuracy of the test may also be affected by improper stacking of the counterweights. On the other hand, the device can only realize the static pressure test function and cannot complete the hammer test operation that is essential in the standard penetration test. It is difficult to fully obtain the mechanical response of the concrete plant foundation under dynamic loads, and thus cannot provide complete and reliable data support for the concrete plant foundation bearing capacity assessment, and it is difficult to meet the strict requirements of concrete plants for foundation testing. Summary of the Invention

[0004] The purpose of the present invention is to provide a foundation bearing capacity testing device for a concrete plant, which solves the above-mentioned technical problems existing in the existing foundation bearing capacity testing device.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A foundation bearing capacity testing device for a concrete factory building comprises a foundation box, a circular track, a lifting module, a detection module, a positioning and guiding module and a driving module; the foundation box is an annular box body, the circular track is also annular and is fixed on the foundation box; two driving modules are arranged on the circular track, each of the driving modules is provided with a support column, a lifting module is arranged between the two support columns, and a pressure block is connected to the lifting module; the circular track, the driving module and the lifting module cooperate to lift the pressure block to perform a static pressure test on the area to be tested, and the pressure block in the air falls to perform a hammer test on the area to be tested.

[0006] Preferably, the longitudinal section of the annular track is T-shaped, and a gear ring is provided on the outer ring of the bottom of the annular track.

[0007] Preferably, the driving module includes a supporting slider and a driving assembly, the supporting slider is slidably connected to the top of the annular track, and the driving assembly is provided at the bottom of the supporting slider; the driving assembly includes a variable frequency drive motor and a gear, the variable frequency drive motor is installed at the bottom of the supporting slider, and a gear is installed at the output end of the variable frequency drive motor, and the gear is meshed with the gear ring.

[0008] Preferably, the lifting module includes two beams, a crane, a winch and a hook module. The two beams are relatively arranged between the two support columns. A crane is movably installed between the two beams. A winch is provided on the crane. The steel rope of the winch is wound around the hook module to drive the hook module to perform lifting movements.

[0009] Preferably, the hook module includes an installation box, a support plate and a pulley, the top and bottom of the installation box are open, a support plate is provided at the bottom of the installation box, a pulley is fixed in the middle of the support plate, and a variable frequency motor is also fixed on the support plate, the output end of the variable frequency motor passes through the support plate and is connected to a screw, and a pressure block is threadedly connected to the screw; a plurality of anti-rotation rods are evenly distributed at the bottom of the support plate and around the screw, the anti-rotation rods are inserted into the anti-rotation holes at the top of the pressure block, and one end of the steel rope of the winch is fixed and wound around the pulley.

[0010] Preferably, a through hole is opened in the middle of the support plate, a bearing is arranged in the through hole, and the output end of the variable frequency motor bearing passes through the through hole through the bearing.

[0011] Preferably, a positioning and guiding module is provided under the crane, and the positioning and guiding module includes a fixed plate, and the fixed plate is suspended under the crane through a suspension rod, and mounting seats are elastically connected to the four corners of the fixed plate, and positioning holes are provided on the mounting seats, and a guide rod is slidably installed at the positioning hole, and the guide rod is clamped and moved by a clamping assembly, and the bottom end of the guide rod is inserted into the top of the pressure block.

[0012] Preferably, the clamping assembly includes a motor, a first roller, a linear drive motor and a second roller. The second roller is rotatably mounted on the top of the linear drive motor and is driven by the linear drive motor to move closer to or away from the guide rod. The first roller is mounted on the output end of the motor and is driven by the motor to rotate forward or reverse. An anti-slip layer is provided on the surface of the first roller and the second roller, and the guide rod is clamped by the first roller and the second roller.

[0013] In the present invention, the device does not need to stack counterweights on the device, and can complete static pressure tests and hammer tests, comprehensively obtaining the mechanical response of the concrete plant foundation under dynamic loads, providing complete and reliable data support for the bearing capacity assessment of the concrete plant foundation, and meeting the strict requirements of the concrete plant for foundation testing.

[0014] The force-bearing area of ​​the test device is expanded by the foundation box, which avoids the test device from affecting the ground to be tested and causing deviations in the test results.

[0015] The longitudinal section of the annular track is T-shaped, which better cooperates with the supporting slider and prevents the drive module from falling off the annular track.

[0016] When the equipment is installed, you only need to lower the hook module through the winch, and then manually move the hook module to the top of the pressure block so that the anti-rotation rod and the anti-rotation hole are inserted accordingly. Start the frequency conversion motor to drive the threaded rod to rotate. The bearing can use its huge bearing capacity to hoist the pressure block on the hook module, saving manpower, material resources and time costs.

[0017] When the pressure block needs to be released from a high altitude, the variable frequency motor is driven in reverse, the anti-rotation rod prevents the relative rotation between the support plate and the pressure block, and the threaded rod slowly rotates away from the pressure block. The pressure block is finally released instantly, and the high-altitude release of the pressure block is completed without human intervention, ensuring the safety of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the hook module structure of the present invention; Figure 3This is a schematic structural diagram of the connection relationship between the annular track and the foundation box of the present invention; Figure 4 This is a structural diagram of the lifting module of the present invention; Figure 5 This is a top view of the detection module structure of the present invention; Figure 6 This is a top view of the positioning and guiding module structure of the present invention; In the figure: 1. foundation box; 2. circular track; 3. lifting module; 4. detection module; 5. positioning and guiding module; 6. drive module; 7. support column; 8. telescopic rod; 9. pressure block; 20. gear ring; 31. crossbeam; 32. crane; 33. winch; 34. hook module; 41. ultrasonic scanner; 42. laser ranging sensor; 51. fixing plate; 52. guide rod; 53. mounting seat; 54. motor; 55. first roller; 56. linear drive motor; 58. second roller; 60. support slider; 61. drive assembly; 341. mounting box; 342. support plate; 343. pulley; 344. variable frequency motor; 345. screw; 346. anti-rotation rod; 611. variable frequency drive motor; 612. gear. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings: The technical solution of this application is mainly used for foundation testing of steel structure factories. Since heavy and high-precision equipment needs to be stacked in the factory, it is necessary to test the static pressure and bearing capacity of the ground so as to facilitate use in the later debugging of the equipment and provide a reference basis for the debugging of the equipment.

[0020] like Figures 1 to 6 The device shown here is a concrete plant foundation bearing capacity test device, comprising a foundation box 1, a circular track 2, a lifting module 3, a detection module 4, a positioning and guidance module 5, and a drive module 6. The circular track 2, drive module 6, and lifting module 3 work together to hoist a pressure block 9 for a static pressure test on the test area. The pressure block 9, suspended in the air, is then dropped to perform a hammer test on the test area.

[0021] The foundation box 1 is an annular box body, and a plurality of reinforcing ribs are arranged inside the foundation box to reduce the weight of the foundation box itself while ensuring the strength of the foundation box.

[0022] The annular track 2 is also annular and is fixed on the foundation box 1. After supporting the lifting module 3, the annular track 2 is dispersed through the foundation box without causing obvious deformation of the foundation box.

[0023] Two driving modules 6 are provided on the circular track 2, and the driving modules 6 drive the lifting module 3 to rotate above the circular track 2. Specifically, a support column 7 is provided on each driving module 6, and the lifting module 3 is provided between the two support columns 7, and the lifting module 3 is connected to the pressure block 9.

[0024] A detection module 4 is connected to one side of the lifting module 3 via a telescopic rod 8, specifically an electric push rod. During the static pressure test, the detection module scans the test area back and forth, acquiring ground subsidence data and determining the maximum static pressure limit. Because hammer tests involve high impact forces and gravity, which pose significant risks, the detection module surveys the test area, achieving unmanned ground detection.

[0025] The detection module 4 includes an ultrasonic scanner 41 and a laser ranging sensor 42. The ultrasonic scanner 41 obtains echo data through reciprocating scanning. Since the position of the laser rangefinder can be determined, a positioning reference point is set at a distance, and a triangular reference coordinate system is formed by repeatedly measuring the distance between the positioning reference point and the top measuring point of the pressure block 9, thereby obtaining the sinking depth of the pressure block 9. The position of the ultrasonic scanner 41 is adjusted according to the sinking depth and the data of the ultrasonic scanner 41 is weighted, so that the data of the ultrasonic scanner 41 is more reference-oriented.

[0026] The longitudinal section of the annular track 2 is T-shaped, and a gear ring 20 is provided on the outer ring of the bottom of the annular track 2 .

[0027] The drive module 6 includes a support slider 60 and a drive assembly 61. The support slider 60 is slidably connected to the top of the annular track 2, and the drive assembly 61 is provided at the bottom of the support slider 60. The drive assembly 61 includes a variable frequency drive motor 611 and a gear 612. The variable frequency drive motor 611 is installed at the bottom of the support slider 60. The gear 612 is installed at the output end of the variable frequency drive motor 611. The gear 612 meshes with the ring gear 20. The variable frequency drive motor 611 drives the gear 612 to mesh with the ring gear 20, thereby realizing the rotation of the lifting module 3.

[0028] In a preferred embodiment, the drive module 6 includes a support assembly and a drive assembly 61. The support assembly includes a support plate and four rotating shafts. The four rotating shafts are rotatably mounted at the bottom of the support plate. A roller is mounted at the bottom end of each rotating shaft. The four rollers are locked to the top of the annular track 2, and the bottom end surface of the support plate is in contact with the top end surface of the annular track 2. The drive assembly 61 includes a variable frequency drive motor 611 and a gear 612. The variable frequency drive motor 611 is mounted at the bottom of the support plate. A gear 612 is mounted at the output end of the variable frequency drive motor 611, and the gear 612 is lower than the roller. The gear 612 is meshed with the gear ring 20. The variable frequency drive motor 611 drives the gear 612 to mesh on the gear ring 20, thereby realizing the rotation of the lifting module 3.

[0029] The lifting module 3 comprises two crossbeams 31, a crane 32, a hoist 33, and a hook module 34. The two crossbeams 31 are positioned relative to each other between two support columns 7, facilitating the reciprocating movement of the crane 32 on the crossbeams. The crane 32 is movably mounted between the two crossbeams 31. Because this device requires precise positioning, the crane 32 and crossbeams 31 are equipped with interlocking positioning gratings to monitor the movement of the crane 2 in real time. This is especially important during impact tests, where the position of the crane 32 requires special attention.

[0030] A winch 33 is provided on the traveling crane 32 , and a steel rope of the winch 33 is connected to the hook module 34 to drive the hook module 34 to perform lifting motion.

[0031] The hook module 34 includes an installation box 341, a support plate 342 and a pulley 343. The top and bottom of the installation box 341 are open, and a support plate 342 is provided at the bottom of the installation box 341. A pulley 343 is fixed in the middle of the support plate 342, and one end of the steel rope of the winch 33 is fixed and wound around the pulley 343.

[0032] A variable frequency motor 344 is fixed in the middle of the support plate 342. The output end of the variable frequency motor 344 passes through the support plate 342 and is connected to a screw 345. The variable frequency motor 344 drives the screw 345 to rotate. A pressure block 99 is threadedly connected to the screw 345. In a specific embodiment, a through hole is opened in the middle of the support plate 342. A bearing is disposed in the through hole. The output end of the bearing of the variable frequency motor 344 passes through the through hole through the bearing.

[0033] A plurality of anti-rotation rods 346 are evenly distributed around the bottom of the support plate 342 and the screw rod 345, and the anti-rotation rods 346 are inserted into the anti-rotation holes at the top of the pressure block 99. The anti-rotation rods 346 are specifically vertical rods. When it is necessary to release the pressure block 9 from high altitude, the frequency conversion motor 344 is driven in reverse, and the anti-rotation rods 346 prevent the relative rotation between the support plate 342 and the pressure block 9. The threaded rod 345 slowly rotates away from the pressure block 9, and the pressure block 9 is released instantly at the end. In a preferred embodiment, the threaded rod and the threaded hole can be replaced by a Luer lock joint. The Luer lock joint has the characteristics of single-turn quick screw connection and locking, which meets the use requirements of this device. The Luer lock joint can complete the locking work by a single-turn rotation. If conventional thread locking is used, when there are only a few turns of the thread left, the connection surface of the thread cannot support the gravity of the pressure block 9, so a special Luer lock joint is required.

[0034] A positioning and guiding module 5 is provided below the crane 32. The positioning and guiding module 5 includes a fixed plate 51, which is suspended below the crane 32 via a boom. A mounting seat 53 is connected to the four corners of the fixed plate 51 via springs. A positioning hole is provided on the mounting seat 53, and a guide rod 52 is slidably installed at the positioning hole. The guide rod 52 is clamped and moved by a clamping assembly, and the bottom end of the guide rod 52 is plugged into the top of the pressure block 9. After testing the static pressure, it is necessary to drive a probe rod with a scale into the area where the bearing capacity is tested, and then hoist the pressure block 9 from a height to drop it to impact the top of the probe rod, and hammer the probe rod downward to obtain the bearing capacity data. The insertion depth value of the probe rod after hammering can be remotely obtained through a laser ranging sensor. If the impact force needs to be adjusted, it is only necessary to control the falling height of the pressure block 9. Therefore, in this process, the guide rod needs to be at different guiding heights. The guide rod plays a guiding role when the gravity block falls, so that the gravity block can directly impact the top of the probe rod.

[0035] The clamping assembly includes a motor 54, a first roller 55, a linear drive motor 56, and a second roller 58. The second roller 58 is rotatably mounted on the top of the linear drive motor 56 and is driven by the linear drive motor 56 toward or away from the guide rod 52. The first roller 55 is mounted on the output end of the motor 54 and is driven by the motor 54 to rotate forward or reverse. Both the first roller 55 and the second roller 58 are coated with an anti-slip layer, and the first and second rollers 55 and 58 clamp the guide rod 52.

[0036] The setting of the fixing plate 51 and the mounting seat 53 ensures that the guide rod 52 has a certain buffer space when it is subjected to a sudden impact. Because this device uses a winch and a hook module to hoist the pressure block 9 as an impact block, when the pressure block 9 is hoisted to the specified height, the motor 54 drives the first roller 55 to rotate and lower the guide rod 52. During this process, the pressure block 9 may still produce slight shaking, so there is no way to accurately insert it into the corresponding hole on the pressure block 9 when it contacts it, so it is necessary to set a conical surface at the bottom end of the guide rod 52, and because the guiding insertion process is not timely, the mounting seat 53 needs to be buffered by a certain distance to ensure that the equipment can operate stably, and because the buffering needs to control the direction, it is necessary to set a positioning pin at the bottom of the mounting seat 53 so that it can only buffer in the up and down directions.

[0037] Multiple stacking areas are provided on the foundation box, in which pressure blocks 9 are placed. In order to reduce transportation costs, except for the pressure block 9 that needs to be placed at the bottom of the static pressure area, the remaining weighted load blocks are replaced by water tanks. By stacking the water tanks on the pressure blocks 9 and then filling them with water, a pressure sensor can be set on the top of the pressure block 9 to detect the total pressure. Then, a timer is used to timestamp the data detected by the pressure sensor, so that the computing terminal can obtain the corresponding relationship between pressure and foundation density.

[0038] The above embodiments are merely some illustrations of the concept and implementation of the present invention, and are not intended to limit the same. Under the concept of the present invention, technical solutions that have not been substantially changed are still within the scope of protection.

Claims

1. A concrete plant foundation bearing capacity testing device, characterized by: The invention comprises a foundation box (1), an annular track (2), a lifting module (3), a detection module (4), a positioning and guiding module (5) and a driving module (6); the foundation box (1) is an annular box body, the annular track (2) is also annular and is fixed on the foundation box (1); two driving modules (6) are arranged on the annular track (2), each of the driving modules (6) is provided with a support column (7), a lifting module (3) is arranged between the two support columns (7), and a pressure block (9) is connected to the lifting module (3); the annular track (2), the driving module (6) and the lifting module (3) cooperate to lift the pressure block (9) to perform a static pressure test on the test area, and the pressure block in the air is dropped to perform a hammer test on the test area.

2. The concrete plant foundation bearing capacity testing device according to claim 1, characterized in that: The annular track (2) has a T-shaped longitudinal section, and a gear ring (20) is provided on the outer ring of the bottom of the annular track (2).

3. The concrete building foundation bearing capacity testing device according to claim 2, characterized in that: The driving module (6) comprises a supporting slider (60) and a driving assembly (61), wherein the supporting slider (60) is slidably connected to the top of the annular track (2), and the driving assembly (61) is provided at the bottom of the supporting slider (60); the driving assembly (61) comprises a variable frequency driving motor (611) and a gear (612), wherein the variable frequency driving motor (611) is installed at the bottom of the supporting slider (60), and the gear (612) is installed at the output end of the variable frequency driving motor (611), and the gear (612) is meshed with the gear ring (20).

4. The concrete building foundation bearing capacity testing device according to claim 1, characterized in that: The lifting module (3) includes two crossbeams (31), a crane (32), a hoist (33) and a hook module (34). The two crossbeams (31) are relatively arranged between the two support columns (7). A crane (32) is movably installed between the two crossbeams (31). A hoist (33) is arranged on the crane (32). The steel rope of the hoist (33) is wound around the hook module (34) to drive the hook module (34) to perform lifting and lowering movements.

5. The concrete building foundation bearing capacity testing device according to claim 4, characterized in that: The hook module (34) includes an installation box (341), a support plate (342) and a pulley (343). The installation box (341) is open at the top and bottom. A support plate (342) is provided at the bottom of the installation box (341). A pulley (343) is fixed in the middle of the support plate (342). A variable frequency motor (344) is also fixed on the support plate (342). The output end of the variable frequency motor (344) passes through the support plate (342) and is connected to a screw (345). A pressure block (9) is threadedly connected to the screw (345). A plurality of anti-rotation rods (346) are evenly distributed at the bottom of the support plate (342) and around the screw (345). The anti-rotation rods (346) are inserted into the anti-rotation holes at the top of the pressure block (9). One end of the steel rope of the winch (33) is fixed and wound around the pulley (343).

6. The concrete building foundation bearing capacity testing device according to claim 5, characterized in that: A through hole is provided in the middle of the support plate (342), a bearing is provided in the through hole, and the output end of the bearing of the variable frequency motor (344) passes through the through hole through the bearing.

7. The concrete building foundation bearing capacity testing device according to claim 4, characterized in that: A positioning guide module (5) is provided below the crane (32), and the positioning guide module (5) includes a fixed plate (51). The fixed plate (51) is suspended below the crane (32) through a suspension rod. Mounting seats (53) are elastically connected to the four corners of the fixed plate (51). Positioning holes are provided on the mounting seats (53). A guide rod (52) is slidably installed at the positioning hole. The guide rod (52) is clamped and moved by a clamping assembly, and the bottom end of the guide rod (52) is plugged into the top of the pressure block (9).

8. The concrete building foundation bearing capacity testing device according to claim 7, characterized in that: The clamping assembly includes a motor (54), a first roller (55), a linear drive motor (56) and a second roller (58), wherein the second roller (58) is rotatably mounted on the top of the linear drive motor (56) and is driven by the linear drive motor (56) to move closer to or away from the guide rod (52), and the first roller (55) is mounted on the output end of the motor (54) and is driven by the motor (54) to rotate forward or reverse, and an anti-slip layer is provided on the surface of the first roller (55) and the second roller (58), and the first roller (55) and the second roller (58) clamp the guide rod (52).

Images