Building foundation strength measuring device

Abstract

The utility model discloses a building foundation strength measuring device which comprises a bearing plate, the upper surface of the bearing plate is fixedly connected with a portal frame, the top of the inner wall of the portal frame is fixedly provided with a hydraulic cylinder, the piston end of the hydraulic cylinder is fixedly connected with a mounting plate, and the top of the mounting plate is provided with a circular level. And the lower surface of the mounting plate is fixedly connected with a detection rod. According to the utility model, through the arrangement of the circular level, the portal frame and the telescopic assembly, after the bearing plate is placed on the surface of a foundation, the state of bubbles in the circular level is observed while the corresponding telescopic rod is adjusted to open different inclination angles, the height of the bearing plate at the position is changed, and finally the horizontal state of the bearing plate is achieved; the hydraulic cylinder is used for applying the load, so that the condition that the soil body is not uniformly stressed due to the fact that the applied load does not pass through the center of the soil body when the force is directly applied by manpower can be avoided, eccentric loading is avoided, and the accuracy of a test result is effectively ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of building foundation strength measurement, in particular to a building foundation strength measurement device. Background Art

[0002] The foundation refers to the soil mass or rock mass that supports the foundation under a building. The soil layers serving as building foundations are divided into rock, gravel soil, sandy soil, silt, cohesive soil, and artificial fill. Foundations are of two types: natural foundations and artificial foundations (composite foundations). A natural foundation is a natural soil layer that does not require human reinforcement. An artificial foundation requires human reinforcement treatment, and common ones include stone chip cushions, sand cushions, and re-compacting of mixed lime soil backfill, etc.

[0003] The foundation refers to the part of the soil mass that is affected by the load of the superstructure. The soil mass or rock mass that bears all the loads of the building under the foundation is called the foundation. The foundation does not belong to the component of the building, but it plays a very important role in ensuring the firmness and durability of the building. And the measurement of building foundation strength refers to evaluating the ability of the foundation to resist damage under the action of the building load through a series of scientific methods and technical means. Foundation strength is an important parameter to ensure the stability and safety of buildings. It is not only related to geological conditions such as lithology and soil type, but also affected by the type of building load.

[0004] In the prior art, the bearing capacity of the foundation is often indirectly evaluated by applying pressure to the foundation layer through a detection rod and the settlement depth of the detection rod. Usually, the depth of the detection rod penetrating into the ground cannot be directly observed, and the detection rod needs to be pulled out and then the depth of the detection rod foundation pit is measured with a measuring ruler. This process is rather cumbersome. At the same time, during the test, when applying load directly to the detection rod manually, it is easy to tilt, and the applied load does not pass through the center of the soil mass, resulting in uneven stress of the soil mass, which will greatly affect the accuracy of the test results. Content of the Utility Model

[0005] The purpose of the utility model is to solve the deficiencies existing in the prior art and propose a building foundation strength measurement device.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: a building foundation strength measurement device, including a bearing plate, a gantry is fixedly connected to the upper surface of the bearing plate, a hydraulic cylinder is fixedly installed at the top of the inner wall of the gantry, a piston end of the hydraulic cylinder is fixedly connected to a mounting plate, a circular spirit level is installed on the top of the mounting plate, a detection rod is fixedly connected to the lower surface of the mounting plate, and a drilling hole matching the detection rod is formed in the side wall of the bearing plate;

[0007] Suspension rods are hinged to the four circumferences of the lower surface of the bearing plate, and positioning assemblies matching the circular spirit level are installed at the ends of the four suspension rods.

[0008] Further, the positioning component includes a bottom plate hinged to one end of the telescopic rod. One end of the lower surface of the bottom plate is fixedly connected with a rubber support seat. The other end of the lower surface of the bottom plate is provided with a slot. A conical ground spike is inserted into the inner wall of the slot, and mounting holes are symmetrically arranged at the top of the outer surface of the conical ground spike.

[0009] Further, both sides of the outer surface of the mounting plate are symmetrically and fixedly connected with connecting rods. One end of the outer surface of each of the two connecting rods is fixedly connected with a pointer, and scale lines matched with the pointer are printed on both side walls of the gantry.

[0010] Further, a U-shaped plate is sleeved and slidably connected to the top of the outer surface of the mounting plate. The circular spirit level is fixedly installed on one side of the outer surface of the U-shaped plate. One end of the U-shaped plate is fixedly connected with a metal elastic sheet, and the inner side of the metal elastic sheet abuts against the outer surface of the mounting plate.

[0011] Further, a first locking pin is threadedly connected through the side wall of the U-shaped plate, and one end of the first locking pin abuts against the outer surface of the mounting plate.

[0012] Further, the telescopic rod includes a main rod and a telescopic member slidably connected through the main rod. One end of the telescopic member is hinged to the top of the bottom plate, and a second locking pin is threadedly connected through the outer surface of the main rod.

[0013] Further, a grip is fixedly connected to the center position of the upper surface of the gantry, and the grip is in a circular ring shape.

[0014] The utility model has the following beneficial effects:

[0015] 1. When the utility model is in use, for the building foundation strength measuring device, through the arranged circular spirit level, gantry and telescopic assembly, after the bearing plate is placed on the foundation surface, by observing the state of the bubble in the circular spirit level while adjusting the corresponding telescopic rod to make it open at different angles, so as to change the height of the bearing plate at this position, and finally achieve the horizontal state of the bearing plate. And by using the hydraulic cylinder to apply the load, it can avoid the situation that when the force is directly applied manually, the applied load does not pass through the center of the soil mass, resulting in uneven stress of the soil mass and avoiding eccentric loading, effectively ensuring the accuracy of the test results;

[0016] 2. When the utility model is in use, for the building foundation strength measuring device, through the arranged telescopic rod, pointer and scale line, the scale value when the detection rod just touches the foundation surface driven by the hydraulic cylinder and the scale value when the detection rod finally penetrates into the foundation after the hydraulic cylinder applies the load are respectively recorded. The difference between the two can reflect the strength of the foundation, and there is no need to pull out the detection rod and measure it again with a measuring ruler, and the overall operation is more concise and clear. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the U-shaped plate of the present utility model;

[0019] Figure 3 It is a schematic diagram of the structure of the positioning component of the present utility model.

[0020] Legend Explanation:

[0021] 1. Bearing plate; 2. Gantry; 3. Handle; 4. Hydraulic cylinder; 5. Mounting plate; 6. Detection rod; 7. Borehole; 8. Link; 9. Pointer; 10. Scale line; 11. U-shaped plate; 12. Metal elastic sheet; 13. Circular spirit level; 14. First locking pin; 15. Telescopic rod; 16. Bottom plate; 17. Rubber support seat; 18. Conical ground spike; 19. Slot; 20. Mounting hole; 21. Second locking pin. Detailed Implementation Manner

[0022] Figures 1 to 3 As shown, it relates to a device for measuring the strength of a building foundation, including a bearing plate 1. A gantry 2 is fixedly connected to the upper surface of the bearing plate 1. A hydraulic cylinder 4 is fixedly installed at the top of the inner wall of the gantry 2. The piston end of the hydraulic cylinder 4 is fixedly connected to a mounting plate 5. A circular spirit level 13 is installed on the top of the mounting plate 5. A detection rod 6 is fixedly connected to the lower surface of the mounting plate 5. And a borehole 7 matching the detection rod 6 is formed in the side wall of the bearing plate 1. By using the hydraulic cylinder 4 as the power input, the detection rod 6 is driven to penetrate into the soil layer, and the strength of the soil layer is judged by calculating the depth of the detection rod 6 penetrating into the soil layer under a certain driving force;

[0023] Telescopic rods 15 are hinged to the periphery of the lower surface of the bearing plate 1. Positioning components matching the circular spirit level 13 are installed at the ends of the four telescopic rods 15. Specifically, the positioning component includes a bottom plate 16 hinged to one end of the telescopic rod 15. A rubber support seat 17 is fixedly connected to one end of the lower surface of the bottom plate 16. A slot 19 is formed in the other end of the lower surface of the bottom plate 16. A conical ground spike 18 is inserted into the inner wall of the slot 19. And mounting holes 20 are symmetrically formed at the top of the outer surface of the conical ground spike 18;

[0024] Among them, the telescopic rod 15 includes a main rod and a telescopic member slidably penetrating and connected inside the main rod. One end of the telescopic member is hinged to the top of the bottom plate 16. And a second locking pin 21 is threadedly connected through the outer surface of the main rod. By controlling the length of the telescopic member extending out of the main rod, the overall length of the telescopic rod 15 can be controlled. And by tightening the second locking pin 21 and pressing its end against the telescopic member, the overall length of the telescopic rod 15 can be fixed;

[0025] Based on the above operation, when the carrying plate 1 is placed on the foundation, the state of the bubble in the circular level 13 can be observed while adjusting the corresponding telescopic rod 15 to open different inclination angles, thereby changing the height of the carrying plate 1 at that position, and finally achieving a horizontal state of the carrying plate 1;

[0026] (The circular level 13 is a closed circular glass container, which contains ether liquid with a small bubble. A small circle is engraved in the center of the top cover of the container, and the center of the small circle is the zero point of the circular level. The spherical normal passing through the zero point is the axis of the circular level. When the bubble of the circular level is centered, the axis of the circular level is at the plumb bob position, that is, in a horizontal state.)

[0027] Furthermore, by inserting the conical spikes 18 and extending them under the foundation, the base plate 16 can be further fixed, so as to prevent the entire device from being unstable and shaking during the subsequent process of the hydraulic cylinder 4 applying a load to the detection rod 6, thereby ensuring the stability of the device.

[0028] Connecting rods 8 are symmetrically fixedly connected to both sides of the outer surface of the mounting plate 5, and pointers 9 are fixedly connected to one end of the outer surfaces of the two connecting rods 8, and scale lines 10 matching the pointers 9 are printed on both side walls of the gantry 2. By recording the scale value when the detection rod 6 driven by the hydraulic cylinder 4 just touches the foundation surface, and the scale value when the detection rod 6 finally extends into the foundation after the hydraulic cylinder 4 finishes applying the load, the difference between the two can reflect the strength of the foundation.

[0029] A 匚-shaped plate 11 is slidably connected to the top of the outer surface of the mounting plate 5, and a circular level 13 is fixedly installed on one side of the outer surface of the 匚-shaped plate 11. A metal spring 12 is fixedly connected to one end of the 匚-shaped plate 11, and the inner side of the metal spring 12 abuts against the outer surface of the mounting plate 5. Correspondingly, a first locking pin 14 is threadedly connected to the side wall of the 匚-shaped plate 11, and one end of the first locking pin 14 abuts against the outer surface of the mounting plate 5.

[0030] By prying the metal spring piece 12, the 匚-shaped plate 11 is mounted on the outer surface of the mounting plate 5, and then the metal spring piece 12 is loosened, and the 匚-shaped plate 11 can be preliminarily assembled on the outside of the mounting plate 5. Then, by tightening the first locking pin 14, the 匚-shaped plate 11 can be fixed on the outer surface of the mounting plate 5, so that the subsequent user can observe the circular level 13 on one side of the 匚-shaped plate.

[0031] A handle 3 is fixedly connected to the center of the upper surface of the gantry 2. The handle 3 is in a circular ring shape. By holding the handle 3, the entire device can be carried, which is convenient for users to transfer the equipment.

[0032] When using the building foundation strength measuring device, first hold the grip 3, move the bearing plate 1 to the position of the test point, and align the drill hole 7 with the test point. Subsequently, while observing the state of the bubble in the circular spirit level 13, adjust the corresponding telescopic rod 15 to open it at different inclination angles, thereby changing the height of the bearing plate 1 at that position, and finally achieving the horizontal state of the bearing plate 1 (the articulated state of the four telescopic rods 15 relative to the bearing plate 1 is similar to the articulated state of a camera tripod in the prior art. When the appropriate placement position is reached, a stable state can be achieved, and the articulation does not affect the final stability);

[0033] Subsequently, the hydraulic cylinder 4 can be activated as the power input to drive the detection rod 6 to first reach the state where the detection rod 6 just touches the ground surface. Record the scale on the scale line 10 pointed by the pointer 9 at this time. Subsequently, slowly apply the preset load value to make the detection rod 6 penetrate into the soil layer, and record the scale value when the detection rod 6 finally penetrates into the foundation after the hydraulic cylinder 4 finishes applying the load. The difference between the two can reflect the strength of the foundation.

[0034] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An apparatus for measuring the strength of a building foundation, comprising a bearing plate (1), characterized in that: The upper surface of the bearing plate (1) is fixedly connected with a gantry (2). The top of the inner wall of the gantry (2) is fixedly installed with a hydraulic cylinder (4). The piston end of the hydraulic cylinder (4) is fixedly connected with a mounting plate (5). A circular spirit level (13) is installed on the top of the mounting plate (5). The lower surface of the mounting plate (5) is fixedly connected with a detection rod (6), and a drilling hole (7) matching the detection rod (6) is formed in the side wall of the bearing plate (1). The lower surface of the bearing plate (1) is hinged with telescopic rods (15) around the perimeter. The ends of the four telescopic rods (15) are all installed with positioning components matching the circular spirit level (13). Two sides of the outer surface of the mounting plate (5) are symmetrically and fixedly connected with connecting rods (8). One ends of the outer surfaces of the two connecting rods (8) are both fixedly connected with pointers (9), and scale lines (10) matching the pointers (9) are printed on both side walls of the gantry (2).

2. The building foundation strength measuring device according to claim 1, characterized in that: The positioning component includes a bottom plate (16) hinged to one end of the telescopic rod (15). One end of the lower surface of the bottom plate (16) is fixedly connected with a rubber support seat (17). The other end of the lower surface of the bottom plate (16) is provided with a slot (19). A conical ground spike (18) is inserted into the inner wall of the slot (19), and mounting holes (20) are symmetrically formed in the top of the outer surface of the conical ground spike (18).

3. The building foundation strength measuring device according to claim 1, characterized in that: A C-shaped plate (11) is sleeved and slidably connected to the top of the outer surface of the mounting plate (5). The circular spirit level (13) is fixedly installed on one side of the outer surface of the C-shaped plate (11). One end of the C-shaped plate (11) is fixedly connected with a metal elastic sheet (12), and the inner side of the metal elastic sheet (12) abuts against the outer surface of the mounting plate (5).

4. An apparatus for measuring the strength of a building foundation according to claim 3, characterized in that: A first locking pin (14) is threadedly connected through the side wall of the C-shaped plate (11), and one end of the first locking pin (14) abuts against the outer surface of the mounting plate (5).

5. The building foundation strength measuring device according to claim 1, characterized in that: The telescopic rod (15) includes a main rod and a telescopic member slidably connected through the inside of the main rod. One end of the telescopic member is hinged to the top of the bottom plate (16), and a second locking pin (21) is threadedly connected through the outer surface of the main rod.

6. The measuring device for the strength of a building foundation according to claim 1, wherein: A handle (3) is fixedly connected to the center position of the upper surface of the gantry (2), and the handle (3) is in a circular ring shape.

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