A system and method for testing dynamic properties of ground soil

Abstract

The application provides a foundation soil dynamic characteristic test system and method, which comprises an assembly shell, the cross section of the assembly shell is in the shape of a V, a walking assembly is installed at the lower end of the assembly shell, two groups of symmetrically arranged placing racks are installed at the top of the assembly shell, a battery pack is installed at the inner side of the placing rack, a bearing plate is installed between the two groups of placing racks, an electric hoist is installed below the bearing plate, the electric hoist is connected with the bearing plate through a support, a hollow limiting seat is arranged below the bearing plate, a block is arranged in the hollow limiting seat, an exciter is arranged above the block and connected with the exciter through a connecting assembly, a connecting frame is installed on the block, a connecting hook is installed on the connecting frame, the assembly shell can integrate multiple devices and provide protection for the devices, so that the devices have the effects of rainproof, sunproof, moistureproof and the like, the outdoor test conditions are met, and the assembly shell is moved conveniently through the cooperation of the walking assembly and the assembly shell.

Description

Technical Field

[0001] This invention relates to the field of foundation soil dynamic property testing technology, and in particular to a foundation soil dynamic property testing system and method. Background Technology

[0002] The foundation is the basic structure of the ground, supporting the ground structure and sharing loads with the ground. It also withstands the erosion and impact of climate change and various natural disasters. The stress-strain characteristics of the foundation play a crucial role in the overall strength and stiffness of the ground structure. Foundation deformation accounts for approximately 70% to 90% of the deformation of the ground structure. The foundation soil is the soil below the foundation that bears the loads transmitted from it. Foundation soil can be roughly divided into cohesionless soil and cohesive soil. Generally speaking, when the foundation is located on cohesionless soil, the Winkler foundation model is more appropriate, especially when the foundation is relatively soft and subjected to localized (concentrated) loads. When the burial depth is large and the soil is relatively compact (such as dense sand), in addition to using the Winkler foundation model with depth-corrected subgrade coefficients, a continuous model can also be used.

[0003] With the increase in heavy vehicles and changes in the geological environment, the bearing capacity of the substructure may decrease. Therefore, before the construction of foundation soil projects, it is necessary to test the dynamic characteristics of the foundation soil. In the existing technology, the dynamic characteristics test of foundation soil is usually divided into indoor test and outdoor test. However, in order to ensure the accuracy of the data, indoor test should be combined with outdoor test.

[0004] Subsequently, when facing outdoor testing, it is necessary to dig a pit in advance for the area to be tested, and then manually install the block (test foundation) to the bottom of the pit, and then install the corresponding vibrator and sensor. Since multiple test sites need to be set up when conducting outdoor testing, after the test at the current location is completed, the equipment needs to be transferred to the next test site. The whole process is quite cumbersome, with high labor costs and high labor intensity, requiring the handling of blocks. Therefore, this invention proposes a foundation soil dynamic property testing system and method to solve the problems existing in the prior art. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide a foundation soil dynamic property testing system and method that is easy to move and solves the problems in the prior art.

[0006] To achieve the objectives of this invention, the following technical solution is provided: A foundation soil dynamic characteristic testing system includes an assembly shell with a U-shaped cross-section. A walking component is installed at the lower end of the assembly shell. Two symmetrically arranged placement racks are installed at the top inside the assembly shell. A battery pack is installed inside the placement racks. A load-bearing plate is installed between the two sets of placement racks. An electric hoist is installed below the load-bearing plate and connected to the load-bearing plate via a bracket. A hollow limiting seat is provided below the load-bearing plate, and a block is provided inside the hollow limiting seat. A vibrator is provided above the block and connected to the vibrator via a connecting component. A connecting frame is installed on the block, and a connecting hook is installed on the connecting frame. The electric hoist has its own hook, and the hook is connected to the connecting hook.

[0007] A further improvement is that the walking component includes two sets of symmetrically arranged connecting seats, each connecting seat has a groove, and both sides of the lower part of the assembly housing have extensions located in the grooves. The connecting seats are connected to the assembly housing, and a support plate is provided below the connecting seats. Both sides of the support plate are equipped with walking wheels, and multiple sets of walking wheels are evenly arranged.

[0008] A further improvement is that the connecting component includes a connecting base plate with a convex cross-section. The block is provided with a connecting groove, and the shape of the connecting groove is adapted to the shape of the connecting base plate. Above the connecting groove, a first connecting hole is provided on the block, and multiple sets of the first connecting holes are evenly provided. Between each pair of the multiple sets of the first connecting holes, a second connecting hole is provided on the block.

[0009] A further improvement is that: both the front and rear sides of the hollow limiting seat are provided with mounting grooves, and rubber rollers are installed on the mounting grooves. Multiple sets of rubber rollers are arranged from top to bottom. Both ends of the rubber roller shaft are equipped with fixing parts, and the fixing parts are connected to the hollow limiting seat through spring telescopic parts.

[0010] A further improvement is that: the top of the assembly housing is provided with an opening, and a solar panel is provided above the opening. The solar panel is connected to the assembly housing through a bracket, and the solar panel is electrically connected to the battery pack.

[0011] A further improvement is that the lower part of the hollow limiting seat is provided with an insertion port, and a support frame is inserted into the insertion port.

[0012] A further improvement is that: limit plates are installed in hollow limit seats on both sides above the block, and the distance between the limit plates on both sides is less than the width of the connecting frame.

[0013] A further improvement is that: clamps are provided on both sides of the battery pack, the clamps are in close contact with the battery pack, and the clamps are connected to the assembly housing and the placement rack by springs.

[0014] A further improvement is that ventilation openings are provided on both sides of the electric hoist's outer casing, and an exhaust fan is installed inside the ventilation opening, with the exhaust fan electrically connected to the battery pack.

[0015] A testing method for a foundation soil dynamic property testing system includes the following steps:

[0016] S1: Push the assembly housing to the outdoor testing area by traction equipment or manual pushing;

[0017] S2: The test site is selected in advance by a person in the outdoor test area, and a test pit of corresponding depth is dug at the test site;

[0018] S3: Push the assembly housing above the test pit, with the walking components located on both sides of the test pit;

[0019] S4: First, start the electric hoist to lift the block a certain distance so that it is detached from the support frame. Then, manually pull out the support frame. After that, start the electric hoist again to lower the block until the block contacts the bottom of the test pit.

[0020] S5: The hook and connecting hook of the electric hoist are separated manually, then the electric hoist is started to retract the hook. Next, the block is connected to the bottom of the test pit, and sensors in the corresponding directions are set on the block. Then the dynamic characteristics test of the foundation soil in the outdoor environment is started.

[0021] The beneficial effects of this invention are as follows: This foundation soil dynamic property testing system and method can integrate multiple devices through the set assembly shell, and provide them with protection, making it rainproof, sunproof, and moistureproof, which can fully meet the conditions of outdoor testing. At the same time, the set walking components cooperate with the assembly shell to facilitate the movement of the assembly shell, thereby reducing the labor intensity of the staff and reducing labor costs, solving the problems of high labor costs and high labor intensity in the prior art. Furthermore, by setting an electric hoist, it can better adapt to test pits of different depths, and facilitate the retrieval and lowering of the blocks. Through the cooperation of the set support frame, hollow limit seat and electric hoist, the blocks can effectively provide a supporting and limiting effect. Attached Figure Description

[0022] Figure 1 This is a front view structural diagram of the present invention.

[0023] Figure 2 This is a top view schematic diagram of the hollow limiting seat of the present invention.

[0024] Figure 3 This is a side view of the hollow limiting seat of the present invention.

[0025] Figure 4 This is a side view of the distribution of the first and second connecting holes of the present invention.

[0026] Figure 5 This is a front view structural diagram of the block lowering process of the present invention.

[0027] The components include: 1. Assembly shell; 2. Placement rack; 3. Battery pack; 4. Load-bearing plate; 5. Electric hoist; 6. Hollow limit seat; 7. Block; 8. Vibrator; 9. Connecting frame; 10. Connecting hook; 11. Connecting seat; 12. Support plate; 13. Walking wheel; 14. Connecting base plate; 15. Connecting groove; 16. First connecting hole; 17. Second connecting hole; 18. Mounting groove; 19. Rubber roller; 20. Fixing component; 21. Spring telescopic component; 22. Solar panel; 23. Insertion port; 24. Support frame; 25. Limiting plate; 26. Clamping plate; 27. Exhaust fan. Detailed Implementation

[0028] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0029] according to Figures 1-5 As shown in the figure, this embodiment proposes a foundation soil dynamic characteristic testing system, including an assembly shell 1. The cross-section of the assembly shell 1 is U-shaped. Specifically, most of the assembly shell 1 is in a closed state, while its lower part is in a state of communication with the outside at both ends. The assembly shell 1 itself will not affect the subsequent insertion and removal of the support frame 24. That is, the assembly shell 1 itself does not block the insertion direction and the removal direction of the support frame 24. In this way, the assembly shell 1 itself can play a protective role for its internal components. Therefore, when conducting dynamic characteristic testing of foundation soil outdoors, this system has certain advantages of rainproof, snowproof and sunproof, which makes it easier to adapt to outdoor testing.

[0030] A traveling assembly is installed at the lower end of the assembly housing 1. The traveling assembly includes two sets of symmetrically arranged connecting seats 11, which are distributed on the left and right sides below the assembly housing 1. The connecting seats 11 are provided with grooves. Furthermore, extensions are provided on both sides below the assembly housing 1. The extensions are integrally formed with the assembly housing 1 and are located in the grooves. The grooves increase the connection area between the connecting seats 11 and the assembly housing 1, thereby improving the connection stability when fixed with bolts. The connecting seats 11 are then connected to the assembly housing 1. Furthermore, a support plate 12 is provided below the connecting seats 11, and traveling wheels 13 are installed on both sides of the support plate 12. Multiple sets of traveling wheels 13 are evenly arranged. In this system, the entire assembly housing 1 is supported by multiple sets of traveling wheels 13. The traveling wheels 13 themselves have high load-bearing capacity. Therefore, under the action of the traveling wheels 13, it is convenient to adjust the assembly housing 1 to the required position, which is very convenient.

[0031] Two symmetrically arranged mounting racks 2 are installed on the top of the assembly housing 1, and a battery pack 3 is installed on the inner side of the mounting rack 2. The battery pack 3 provides power to this test system, so that the system can be used for outdoor dynamic characteristic testing without external power supply, thus meeting the requirements of outdoor foundation soil dynamic characteristic testing. Furthermore, an opening is provided on the top of the assembly housing 1 to facilitate the passage of cables. A solar panel 22 is installed above the opening and is connected to the assembly housing 1 through a bracket. The solar panel 22 is tilted and electrically connected to the battery pack 3. Thus, this system uses sustainable clean energy to supplement the battery pack 3 with power, thereby saving the power cost of this system.

[0032] A load-bearing plate 4 is installed between two sets of placement racks 2, and the load-bearing plate 4 is fixedly connected to the placement rack 2. An electric hoist 5 is installed below the load-bearing plate 4, and the electric hoist 5 is connected to the load-bearing plate 4 through a bracket. A hollow limiting seat 6 is provided below the load-bearing plate 4, and there is a certain gap between the hollow limiting seat 6 and the load-bearing plate 4. A block 7 is provided inside the hollow limiting seat 6, and a vibrator 8 is provided above the block 7. In this embodiment, a pair of vibrators 8 are provided. In addition, a variable frequency speed control motor is also included, which is connected to a... The vibrator is shaft-connected, and the block 7 is connected to the vibrator 8 via a connecting assembly. The connecting assembly includes a connecting base plate 14 with a convex cross-section. A connecting groove 15 is provided on the block 7. The front and upper ends of the connecting groove 15 are open to the outside, while its rear end and both sides are closed. The shape of the connecting groove 15 matches the shape of the connecting base plate 14. Therefore, the connection between the connecting base plate 14 and the block 7 is an insertion connection. This method is used to facilitate disassembly and replacement. Above the connecting groove 15, a first connecting hole 16 is provided on the block 7, and multiple sets of first connecting holes 16 are evenly distributed. In this embodiment, the first connecting holes 16 are evenly distributed on both sides above the connecting groove 15. Specifically, a second connecting hole 17 is provided between each pair of the multiple sets of first connecting holes 16 on the block 7. In this embodiment, the first connecting hole 16 is used to install bolts, but the bolts pass through the connecting base plate 14 and connect to the block 7 below the connecting base plate 14. This is to ensure that the connecting base plate 14 and the block are connected during testing. A gap appears between blocks 7. A bolt is installed through the second connecting hole 17. However, this bolt does not penetrate the connecting base plate 14. Instead, its lower end contacts the connecting base plate 14. The lower end of the corresponding bolt needs to be smoothed and ground. This creates a downward pressure on the connecting base plate 14, making it tightly connected to the block 7. That is, the bolt in the first connecting hole 16 is used to fix the connecting base plate 14, while the bolt in the second connecting hole 17 is used to press the connecting base plate 14 to ensure the accuracy of subsequent testing.

[0033] Secondly, a connecting frame 9 is installed on the block 7. The connecting frame 9 itself only serves a connecting function, that is, a connecting hook 10 is installed on the connecting frame 9, and the electric hoist 5 has its own hook, and the hook is connected to the connecting hook 10. The connection method is detachable. At the same time, limit plates 25 are installed in the hollow limit seats 6 on both sides of the upper part of the block 7. The distance between the two limit plates 25 is less than the width of the connecting frame 9. When the electric hoist 5 starts and lifts the block 7 upward, the limit plates 25 provide a limiting function. That is, when the connecting frame 9 contacts the limit plate 25, the block 7 is in the predetermined position. Furthermore, the lower part of the hollow limit seat 6 has an insertion port 23, and a support frame 24 is inserted into the insertion port 23, thereby connecting... After the connecting frame 9 contacts the limiting plate 25, the electric hoist 5 is in an unretracted state. The support frame 24 is manually inserted into the opening 23, and then the electric hoist 5 is started to lower the block 7 onto the support frame 24 and stop. At this time, the electric hoist 5 still has a certain traction force on the block 7, but the block 7 is still supported by the support frame 24. The support frame 24 is further subjected to a downward force, and its contact with the hollow limiting seat 6 is more compact. Under the influence of gravity and friction, the support frame 24 itself is not easy to pull out of the insertion opening 23, thus achieving a self-fixing effect of the support frame 24, further supporting the block 7, reducing the pressure on the electric hoist 5, and helping to improve the service life of the equipment.

[0034] The hollow limiting seat 6 has mounting grooves 18 on both the front and rear sides. Rubber rollers 19 are mounted on the mounting grooves 18, and multiple sets of rubber rollers 19 are arranged from top to bottom. At the same time, fixing members 20 are installed at both ends of the shaft of the rubber rollers 19. The fixing members 20 are connected to the hollow limiting seat 6 through spring telescopic members 21. In this embodiment, the spring telescopic member 21 is composed of a telescopic member and a spring. That is, the two ends of the telescopic member are connected to the fixing member 20 and the hollow limiting seat 6 respectively, and the spring is sleeved on the telescopic member. Its two ends are also connected to the fixing member 20 and the hollow limiting seat 6 respectively. Then, under the action of the rubber rollers 19 on the front and rear sides, it is convenient to produce a limiting and buffering effect on the block 7. The minimum distance between the corresponding front and rear rubber rollers 19 is consistent with the length of the block 7. In this embodiment, the block 7 is square, but in actual application, the block 7 itself can be rectangular. Then, the distance between other components of this system is changed accordingly according to the size of the block 7.

[0035] Clamping plates 26 are provided on both sides of the battery pack 3. The clamping plates 26 are in close contact with the battery pack 3 and are connected to the assembly shell 1 and the placement rack 2 by springs. The cooperation between the springs and the clamping plates 26 creates a certain clamping effect on the battery pack 3, which facilitates its positioning. Furthermore, ventilation openings are provided on both sides of the electric hoist 5 on the assembly shell 1. Exhaust fans 27 are installed in the ventilation openings and are electrically connected to the battery pack 3. The exhaust fans 27 facilitate air circulation inside the assembly shell 1, and their corresponding positions can remove the heat generated by the electric hoist 5 during operation when the air circulates. At the same time, the air passes through the bottom of the placement rack 2, which can also provide a certain cooling effect for the battery pack 3.

[0036] A test method for a foundation soil dynamic property testing system is disclosed. This test method is mainly applicable to outdoor environments and is used for testing the dynamic characteristics of natural and artificial foundations, as well as forced vibration tests in Xining. The method includes the following steps:

[0037] S1: The assembly shell 1 is pushed to the outdoor testing area by traction equipment or manual pushing. The set walking components facilitate the movement of the assembly shell 1. Since the outdoor foundation soil dynamic characteristic test is usually conducted at a location near the foundation, multiple locations are selected to improve the accuracy of the data. Therefore, by facilitating the movement of the assembly shell 1 during the test, the efficiency of the characteristic test is improved, while reducing the labor intensity of the staff.

[0038] S2: The corresponding test site is selected in advance by the operator in the outdoor test area, and a test pit of the corresponding depth is dug at the test site. According to the requirements of the foundation soil dynamic test, the test pit is dug first, and the bottom of the pit should maintain the original structure of the test soil layer, and the bottom surface of the test pit should be kept horizontal.

[0039] S3: Then push the assembly shell 1 to the top of the test pit, where the walking components are located on both sides of the test pit, and the block 7 is located above the test pit.

[0040] S4: First, start the electric hoist 5 to lift the block 7 a certain distance so that it is separated from the support frame 24. Then, manually pull out the support frame 24. After that, start the electric hoist 5 again to lower the block 7 until the block 7 contacts the bottom of the test pit.

[0041] S5: The hook and connecting hook 10 of the electric hoist 5 are separated manually, and then the electric hoist 5 is started to retract the hook. Then the block 7 is connected to the bottom of the test pit, and sensors in the corresponding direction are set on the block 7. For example, in this embodiment, a vertical vibration test is performed. Then, vertical sensors need to be set on both sides of the upper end of the block 7 before the dynamic characteristics test of the foundation soil in the outdoor environment is started. Specifically, when performing a vertical vibration test, the vertical disturbance force of the vibrator 8 should be on the same vertical line as the center of gravity of the foundation.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foundation soil dynamic property testing system, characterized in that: The assembly includes an outer casing (1) with a U-shaped cross-section. A walking assembly is installed at the lower end of the outer casing (1). Two symmetrically arranged placement racks (2) are installed at the top inside the outer casing (1). A battery pack (3) is installed on the inner side of the placement racks (2). A load-bearing plate (4) is installed between the two sets of placement racks (2). An electric hoist (5) is installed below the load-bearing plate (4). The electric hoist (5) is supported by a support. The frame is connected to the load-bearing plate (4). A hollow limiting seat (6) is provided below the load-bearing plate (4), and a block (7) is provided inside the hollow limiting seat (6). An exciter (8) is provided above the block (7) and is connected to the exciter (8) through a connecting assembly. A connecting frame (9) is installed on the block (7), and a connecting hook (10) is installed on the connecting frame (9). The electric hoist (5) has its own hook, and the hook is connected to the connecting hook (10).

2. The foundation soil dynamic property testing system according to claim 1, characterized in that: The walking assembly includes two sets of symmetrically arranged connecting seats (11). The connecting seats (11) are provided with grooves. The two sides below the assembly housing (1) are provided with extensions, and the extensions are located in the grooves. The connecting seats (11) are connected to the assembly housing (1). A support plate (12) is provided below the connecting seats (11). The two sides of the support plate (12) are equipped with walking wheels (13), and multiple sets of walking wheels (13) are evenly arranged.

3. The foundation soil dynamic property testing system according to claim 1, characterized in that: The connecting assembly includes a connecting base plate (14), the connecting base plate (14) has a convex cross section, the block (7) is provided with a connecting groove (15), and the shape of the connecting groove (15) is adapted to the shape of the connecting base plate (14). Above the connecting groove (15), a first connecting hole (16) is provided on the block (7), and multiple sets of the first connecting holes (16) are evenly provided. Between each pair of the multiple sets of the first connecting holes (16), a second connecting hole (17) is provided on the block (7).

4. The foundation soil dynamic property testing system according to claim 1, characterized in that: The hollow limiting seat (6) has mounting grooves (18) on both the front and rear sides. Rubber rollers (19) are installed on the mounting grooves (18), and multiple sets of rubber rollers (19) are arranged from top to bottom. Fixing members (20) are installed at both ends of the shaft of the rubber rollers (19), and the fixing members (20) are connected to the hollow limiting seat (6) through spring telescopic members (21).

5. The foundation soil dynamic property testing system according to claim 1, characterized in that: The top of the assembly housing (1) is provided with an opening, and a solar panel (22) is provided above the opening. The solar panel (22) is connected to the assembly housing (1) through a bracket, and the solar panel (22) is electrically connected to the battery pack (3).

6. The foundation soil dynamic property testing system according to claim 1, characterized in that: The lower part of the hollow limiting seat (6) is provided with an insertion port (23), and a support frame (24) is inserted into the insertion port (23).

7. The foundation soil dynamic property testing system according to claim 1, characterized in that: Limiting plates (25) are installed in hollow limiting seats (6) on both sides of the block (7), and the distance between the limiting plates (25) on both sides is less than the width of the connecting frame (9).

8. The foundation soil dynamic property testing system according to claim 1, characterized in that: The battery pack (3) is provided with clamps (26) on both sides. The clamps (26) are in close contact with the battery pack (3) and are connected to the assembly housing (1) and the placement rack (2) by springs.

9. The foundation soil dynamic property testing system according to claim 1, characterized in that: Both sides of the electric hoist (5) are provided with ventilation openings on the assembly shell (1), and an exhaust fan (27) is installed in the ventilation opening, and the exhaust fan (27) is electrically connected to the battery pack (3).

10. A testing method applied to the foundation soil dynamic property testing system according to claim 1, characterized in that: Includes the following steps: S1: Push the assembly housing (1) to the outdoor testing area by traction equipment or manual pushing; S2: The test site is selected in advance by a person in the outdoor test area, and a test pit of corresponding depth is dug at the test site; S3: Push the assembly housing (1) above the test pit, wherein the walking components are located on both sides of the test pit; S4: First start the electric hoist (5) to lift the block (7) a certain distance so that it is separated from the support frame (24). Then, manually pull out the support frame (24). After that, start the electric hoist (5) again to lower the block (7) until the block (7) contacts the bottom of the test pit. S5: The hook and connecting hook (10) of the electric hoist (5) are separated manually, and then the electric hoist (5) is started to retract the hook. Then the block (7) is connected to the bottom of the test pit, and sensors in the corresponding directions are set on the block (7). Then the dynamic characteristics test of the foundation soil in the outdoor environment is started.

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