Soil body surface stress testing device

Abstract

The utility model provides a soil body surface stress testing device which comprises a top plate located on a soil body, the lower side of the top plate is matched with an insertion pipe in a threaded mode, a plurality of pressure sensors are arranged on the lower side of the top plate, a plurality of stress sensors are arranged on the peripheral side of the insertion pipe, a pull rod is arranged in the insertion pipe in a sliding fit mode, and one end of the pull rod is elastically matched with a plurality of arc-shaped plates. A plurality of distance sensors are arranged at one end of the pull rod and correspond to the arc-shaped plates, and a plurality of horizontal rulers are arranged on the top plate. According to the utility model, the lower side of the top plate is provided with the pressure sensor, and the peripheral side of the insertion pipe is provided with the stress sensor, so that the axial and radial stress can be detected, the practicability of the device is improved, the application range of the device is expanded, and the insertion pipe is convenient to disassemble and replace; and the deformation degree of the cannula can be detected, so that the accuracy of a test result is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stress testing, in particular to a soil surface stress testing device. Background Art

[0002] When conducting soil stress testing, the test device is usually placed inside the soil. For example, the patent with announcement number CN217520620U discloses a soil stress monitoring device, including: a top plate and a bottom plate below the top plate, the bottom of the top plate is fixedly connected with a plurality of equally spaced vertical rods, and the vertical rods are movable through the bottom plate, a groove is provided at the bottom of the vertical rod, a stress sensor is installed in the groove, a threaded sleeve is fixedly inserted inside the top plate, the internal thread of the threaded sleeve is connected with a threaded rod a, and the bottom end of the threaded rod a is rotatably connected to the top of the bottom plate, one side of the top plate is fixedly connected with an outer box, a laser transmitter is installed inside the outer box, a glass plate is installed on the side of the outer box away from the top plate, a light receiving plate is fixedly connected on the other side of the top plate, and a leveling mechanism is provided at the bottom of the bottom plate. The device tests stress through multiple stress sensors, but the device can only detect axial stress and cannot detect radial stress, resulting in a small scope of application and poor practicality of the device.

[0003] To this end, the utility model provides a soil surface stress testing device. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a soil surface stress testing device to solve the problems raised in the above-mentioned background technology. The utility model can detect axial and radial stresses, improve the practicability of the device, expand the scope of application of the device, and facilitate the disassembly and replacement of the cannula; the deformation degree of the cannula can be detected, thereby improving the accuracy of the test results.

[0005] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a soil surface stress testing device, including a top plate located on the soil, a plug is threadedly fitted on the lower side of the top plate, a plurality of pressure sensors are installed on the lower side of the top plate, a plurality of stress sensors are installed on the circumferential side of the plug, a pull rod is slidably fitted in the plug, a plurality of arc plates are elastically fitted on one end of the pull rod, a plurality of distance sensors are installed on one end of the pull rod, the distance sensors correspond to the arc plates, and a plurality of level rulers are installed on the top plate.

[0006] Furthermore, a thread groove is provided in the top plate, and a thread head is fixed to one end of the insert pipe, and the thread head corresponds to the thread groove.

[0007] Furthermore, the lower side of the top plate is in contact with the soil surface, and the insert pipe is located in the soil.

[0008] Furthermore, the pressure sensor is fixed to the lower side of the top plate, and a plurality of pressure sensors are respectively located on the peripheral sides of the cannula.

[0009] Furthermore, the stress sensor is fixedly connected to the cannula.

[0010] Furthermore, a through slot is provided in the insert tube, and the pull rod is located in the through slot.

[0011] Furthermore, an elastic telescopic rod is fixed between the pull rod and the arc plate, the arc plate is located on the peripheral side of the pull rod, and a plurality of arc plates are combined to form an annular structure.

[0012] Furthermore, the top plate is provided with a plurality of mounting grooves, and the mounting grooves correspond to the level rulers.

[0013] Beneficial effects of the utility model: The utility model provides a soil surface stress testing device, comprising a top plate; a pressure sensor; a cannula; a stress sensor; a cannula; a pull rod; and an arc plate.

[0014] A pressure sensor is installed on the lower side of the top plate, and a stress sensor is installed on the circumferential side of the cannula, so as to detect axial and radial stresses, improve the practicability of the device, expand the scope of application of the device, and facilitate the disassembly and replacement of the cannula. A pull rod is installed in the cannula, and an arc plate is installed at one end of the pull rod, so as to detect the deformation degree of the cannula, thereby improving the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall assembly three-dimensional structure of a soil surface stress testing device of the utility model;

[0016] Figure 2 It is a schematic diagram of the overall assembly cross-sectional structure of a soil surface stress testing device of the utility model;

[0017] Figure 3 This is an exploded diagram of a soil surface stress testing device of the utility model;

[0018] Figure 4 for Figure 3 Schematic diagram at A in the middle;

[0019] Figure 5 It is a schematic diagram of the assembled three-dimensional structure of a top plate, a pressure sensor, a cannula, and a stress sensor in a soil surface stress testing device of the utility model;

[0020] In the figure: 1, top plate; 2, pressure sensor; 3, insert tube; 4, stress sensor; 5, through groove; 6, thread groove; 7, thread head; 8, mounting groove; 9, pull rod; 10, elastic telescopic rod; 11, arc plate; 12, distance sensor. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] See also Figures 1 to 5 The utility model provides a technical solution: a soil surface stress testing device, comprising a top plate 1 located on the soil, a plug 3 is threadedly fitted on the lower side of the top plate 1, a plurality of pressure sensors 2 are installed on the lower side of the top plate 1, a plurality of stress sensors 4 are installed on the circumference of the plug 3, a pull rod 9 is slidably fitted in the plug 3, a plurality of arc plates 11 are elastically fitted on one end of the pull rod 9, a plurality of distance sensors 12 are installed on one end of the pull rod 9, the distance sensors 12 correspond to the arc plates 11, and a plurality of level rulers are installed on the top plate 1.

[0023] In this embodiment, a thread groove 6 is provided in the top plate 1 , and a thread head 7 is fixed to one end of the inserting tube 3 , and the thread head 7 corresponds to the thread groove 6 .

[0024] Specifically, the insert pipe 3 can be fixed to the top plate 1 through the threaded head 7 and the threaded groove 6 to ensure that the insert pipe 3 is perpendicular to the top plate 1 , so that the stress on the soil surface can be tested through the top plate 1 and the insert pipe 3 .

[0025] When the cannula 3 is bent, the cannula 3 needs to be disassembled and replaced. The cannula 3 can be disassembled by rotating it, and then the cannula 3 can be replaced.

[0026] The lower side of the top plate 1 contacts the soil surface, the insert pipe 3 is located in the soil, the pressure sensor 2 is fixed to the lower side of the top plate 1 , a plurality of pressure sensors 2 are respectively located around the insert pipe 3 , and the stress sensor 4 is fixedly connected to the insert pipe 3 .

[0027] Specifically, when it is necessary to detect the stress on the soil surface, the insert pipe 3 is inserted into the soil so that the top plate 1 contacts the surface of the soil, so that the pressure sensor 2 and the stress sensor 4 can detect the soil stress.

[0028] A through slot 5 is provided in the insert tube 3, a pull rod 9 is located in the through slot 5, an elastic telescopic rod 10 is fixed between the pull rod 9 and an arc plate 11, the arc plate 11 is located around the pull rod 9, and a plurality of arc plates 11 are combined to form an annular structure.

[0029] Specifically, when the cannula 3 is bent, the pull rod 9 is inserted into the through groove 5 so that the arc plate 11 is compressed by the inner wall of the cannula 3. The distance sensor 12 is used to detect the distance between the arc plate 11 and the pull rod 9, so as to measure the bending degree of the cannula 3, thereby ensuring the accuracy of the stress measurement result.

[0030] A plurality of mounting grooves 8 are formed on the top plate 1, and the mounting grooves 8 correspond to the level rulers.

[0031] Specifically, a level ruler may be installed in the installation groove 8 to determine the inclination angle of the top plate 1, thereby ensuring that the top plate 1 is initially horizontal and preventing the insertion tube 3 from being inserted into the soil at an angle.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A soil surface stress testing device, comprising a top plate (1) located on the soil, characterized in that: The lower side of the top plate (1) is threadedly engaged with a plug (3), a plurality of pressure sensors (2) are installed on the lower side of the top plate (1), a plurality of stress sensors (4) are installed on the peripheral side of the plug (3), a pull rod (9) is slidably engaged in the plug (3), one end of the pull rod (9) is elastically engaged with a plurality of arc plates (11), one end of the pull rod (9) is equipped with a plurality of distance sensors (12), the distance sensors (12) correspond to the arc plates (11), and a plurality of level rulers are installed on the top plate (1).

2. A soil surface stress testing device according to claim 1, characterized in that: A thread groove (6) is provided in the top plate (1), and a thread head (7) is fixed to one end of the insert pipe (3), and the thread head (7) corresponds to the thread groove (6).

3. A soil surface stress testing device according to claim 1, characterized in that: The lower side of the top plate (1) is in contact with the surface of the soil, and the insertion pipe (3) is located in the soil.

4. A soil surface stress testing device according to claim 1, characterized in that: The pressure sensor (2) is fixed to the lower side of the top plate (1), and a plurality of pressure sensors (2) are respectively located on the peripheral side of the cannula (3).

5. The soil surface stress testing device according to claim 1, characterized in that: The stress sensor (4) is fixedly connected to the cannula (3).

6. A soil surface stress testing device according to claim 1, characterized in that: A through slot (5) is provided in the insert tube (3), and the pull rod (9) is located in the through slot (5).

7. A soil surface stress testing device according to claim 1, characterized in that: An elastic telescopic rod (10) is fixed between the pull rod (9) and the arc-shaped plate (11); the arc-shaped plate (11) is located on the peripheral side of the pull rod (9); and a plurality of arc-shaped plates (11) are combined to form an annular structure.

8. The soil surface stress testing device according to claim 1, characterized in that: The top plate (1) is provided with a plurality of mounting grooves (8), and the mounting grooves (8) correspond to the level rulers.

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