Rock-soil direct shear test device

Abstract

The utility model provides a rock-soil direct shear test device, which relates to the technical field of rock-soil direct shear test devices, and comprises a test mechanism, the test mechanism comprises a lower box, the top of the lower box is provided with an upper box, the lower box is internally provided with a fixing mechanism, the fixing mechanism comprises a clamping block, the clamping block is arranged in the lower box, and the clamping block is arranged in the lower box. One end of the clamping block is fixedly connected with a connecting column, and the end, away from the clamping block, of the connecting column is fixedly connected with an extrusion piece. According to the shear box for the rock-soil direct shear test, the fixing mechanism is arranged, so that the lower box and the upper box of the shear box for the rock-soil direct shear test can be connected and disconnected more conveniently, compared with a traditional mode that the upper box and the lower box are fixed through four bolts, the fixing mode is higher in efficiency, the time for installing the shear box can be saved, and the cost is reduced. The lower box is used for filling and installing the rock-soil sample, and the strip-shaped groove is formed in the lower box, so that the pull block can be arranged in the lower box.

Description

Technical Field

[0001] The utility model relates to the technical field of rock and soil direct shear test devices, in particular to a rock and soil direct shear test device. Background Art

[0002] The full name of direct shear test is direct shear test. It is a test used in civil engineering to find the shear strength of soil. Usually, the soil sample is placed in a shear box, the upper box is fixed, and the lower box can slide in the horizontal direction. First, vertical pressure is applied, and then horizontal shear force is applied to the lower box of the shear box step by step until the sample is sheared. Generally, 4-5 samples are taken and different vertical pressures are applied to each of them to repeat the test. This test is a common method for determining the shear strength of soil because it is simple and easy to perform.

[0003] The existing geotechnical direct shear test requires that the geotechnical sample be placed in a shear box, and the connection between the upper box and the lower box is connected by four bolts. Since the geotechnical direct shear test usually needs to be performed four to five times, and the geotechnical sample needs to be replaced for each test, the upper box and the lower box need to be frequently connected and disconnected, so it is necessary to repeatedly tighten the bolts, resulting in a lot of time wasted in the disassembly and assembly of the upper box and the lower box. For this reason, we provide a geotechnical direct shear test device. Utility Model Content

[0004] The utility model aims to solve the disadvantage of inconvenient connection of a shear box used for a rock and soil direct shear test in the prior art, and provides a rock and soil direct shear test device.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a rock and soil direct shear test device, comprising: a test mechanism, the test mechanism comprises a lower box, an upper box is provided on the top of the lower box, a fixing mechanism is provided inside the lower box, the fixing mechanism comprises a clamping block, the clamping block is placed inside the lower box, one end of the clamping block is fixedly connected to a connecting column, the end of the connecting column away from the clamping block is fixedly connected to an extrusion sheet, the outer surface of the extrusion sheet is fixedly connected to a guide block, the guide block is placed in a guide groove provided in the lower box, a side surface of the extrusion sheet is provided with a spring, the two ends of the spring are respectively fixedly connected to the outer surface of the extrusion sheet and the inner wall of the lower box, the outer surface of the extrusion sheet is fixedly connected to a rectangular block, the rectangular block runs through the interior of the lower box, and the rectangular block is slidably connected to the lower box.

[0006] As a preferred embodiment, a pull block is fixedly connected to one end of the rectangular block, a strip groove matching the pull block is formed on the lower box, and a hook groove is formed on the pull block.

[0007] As a preferred embodiment, an insert block is fixedly connected to one side of the upper box, and a slot matching the insert block is formed on the lower box.

[0008] As a preferred implementation, a slot is provided on the inserting block, and a positioning block is fixedly connected to a side of the upper box close to the inserting block.

[0009] As a preferred implementation, the number of the positioning blocks is two, and the lower box is provided with positioning grooves that fit with the positioning blocks.

[0010] As a preferred embodiment, a side surface of the upper box is fixedly connected with a plug, and the number of the plug is four.

[0011] As a preferred embodiment, a cylindrical groove matching with the plug post is formed on the lower box, and a filling groove is formed on both the lower box and the upper box.

[0012] Compared with the prior art, the advantages and positive effects of the utility model are:

[0013] The utility model, by setting a fixing mechanism, makes it more convenient to connect and disconnect the lower box and the upper box of the shear box used for the geotechnical direct shear test. Compared with the traditional method of using four bolts to fix the upper box and the lower box, the fixing method is more efficient and can save the time of installing the shear box for filling and installing the geotechnical samples. The strip groove is opened on the lower box, so that the pull block can be placed in the lower box, and thus will not affect the coordinated use of the lower box with other test components. In addition, a guide block is provided, so that the upper box and the lower box can be positioned and installed, and then the plug block can smoothly enter the slot opened on the lower box. The plug column is provided, so that the connection strength between the upper box and the lower box is higher and will not be affected by the side components. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention is a stereoscopic diagram of a rock and soil direct shear test device provided by the utility model.

[0015] Figure 2 The utility model provides a schematic diagram of the disassembly of a rock and soil direct shear test device.

[0016] Figure 3 The utility model provides a schematic diagram of the disassembly of a rock and soil direct shear test device.

[0017] Figure 4 The utility model provides a schematic diagram of the installation of a pull block of a rock and soil direct shear test device.

[0018] Figure 5 The utility model provides a cross-sectional stereoscopic diagram of a fixing mechanism of a rock and soil direct shear test device.

[0019] Figure 6 This is an enlarged view of area A of a rock and soil direct shear test device provided by the utility model.

[0020] Legend:

[0021] 1. Test mechanism; 2. Fixing mechanism; 11. Lower box; 12. Upper box; 13. Insert block;

[0022] 14. Card slot; 15. Positioning block; 16. Insertion column; 17. Filling slot; 21. Card block;

[0023] 22. Connecting column; 23. Extrusion sheet; 24. Guide block; 25. Spring; 26. Rectangular block;

[0024] 27. Pull block; 28. Strip groove; 29. ​​Hook groove. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example 1

[0027] like Figure 1-Figure 6 As shown, the utility model provides a technical solution: a rock and soil direct shear test device, comprising: a test mechanism 1, the test mechanism 1 comprises a lower box 11, the top of the lower box 11 is provided with an upper box 12, the interior of the lower box 11 is provided with a fixing mechanism 2, the fixing mechanism 2 comprises a clamping block 21, the clamping block 21 is placed inside the lower box 11, one end of the clamping block 21 is fixedly connected to a connecting column 22, one end of the connecting column 22 away from the clamping block 21 is fixedly connected to an extrusion sheet 23, the outer surface of the extrusion sheet 23 is fixedly connected to a guide block 24, the guide block 2 4 is placed in the guide groove opened in the lower box 11, a spring 25 is provided on one side of the extrusion sheet 23, and the two ends of the spring 25 are respectively fixedly connected to the outer surface of the extrusion sheet 23 and the inner wall of the lower box 11, a rectangular block 26 is fixedly connected to the outer surface of the extrusion sheet 23, the rectangular block 26 runs through the interior of the lower box 11, the rectangular block 26 is slidably connected to the lower box 11, and a pull block 27 is fixedly connected to one end of the rectangular block 26, a strip groove 28 matching with the pull block 27 is opened on the lower box 11, and a hook groove 29 is opened on the pull block 27.

[0028] In this embodiment, by setting up the fixing mechanism 2, the connection between the lower box 11 and the upper box 12 can be made more convenient, thereby effectively saving the time spent on connecting and disconnecting the lower box 11 and the upper box 12, and a card block 21 is set, and the card slot 14 opened on the plug block 13 can fit with the card block 21, and then the card block 21 can be connected by card engagement with the plug block 13, so as to achieve the purpose of fixing the lower box 11 and the upper box 12, in addition, two guide blocks 24 are set, and a guide groove matching the guide block 24 is opened inside the lower box 11, so that the movement of the extrusion sheet 23 will not be affected by the spring 25, so that the card block 21 can be smoothly engaged in the card slot 14, and a spring 25 is set, and the elastic force of the spring 25 can be used to automatically reset the card block 21 after being squeezed, and in addition, the opening of the strip groove 28 can hide the pull block 27, which will not affect the connection between the lower box 11 and other test components.

[0029] Example 2

[0030] like Figure 1-Figure 6 As shown, an insert block 13 is fixedly connected to one side of the upper box 12, a slot matching the insert block 13 is provided on the lower box 11, a card slot 14 is provided on the insert block 13, a positioning block 15 is fixedly connected to one side of the upper box 12 close to the insert block 13, the number of the positioning blocks 15 is two, the lower box 11 is provided with a positioning groove matching the positioning block 15, a plug post 16 is fixedly connected to one side of the upper box 12, the number of the plug post 16 is four, the lower box 11 is provided with a cylindrical groove matching the plug post 16, and both the lower box 11 and the upper box 12 are provided with a filling groove 17.

[0031] In this embodiment, by opening a hook groove 29 on the pull block 27, the test personnel can pull and adjust the pull block 27 with the help of auxiliary tools, so that the blocking block 21 can be indirectly driven to disengage from the plug block 13, and the positioning block 15 is provided, and the connection between the positioning block 15 and the positioning groove opened on the lower box 11 is observable. Therefore, the positioning block 15 is used to connect the lower box 11 and the upper box 12 to ensure that the plug block 13 can smoothly enter the lower box 11.

[0032] Working principle:

[0033] like Figure 1-Figure 6As shown, when the utility model is in use, the lower box 11 and the upper box 12 can be connected first, and the positioning block 15 fixedly connected to the upper box 12 can be aligned with the positioning groove provided on the lower box 11, and the plug post 16 can be aligned with the cylindrical groove provided on the lower box 11, so that the plug block 13 can be aligned with the slot provided on the lower box 11, and the upper box 12 is slowly moved close to the lower box 11, and the plug block 13 can squeeze the card block 21, so that the card block 21 slowly slides, and when the card block 21 slides, the squeezing sheet 23 is used to compress the spring 25, so that the spring 25 generates elastic force, until when the plug block 13 completely enters the interior of the lower box 11, the elastic force of the spring 25 is instantly released, and under the guidance of the guide block 24, the card block 21 is automatically reset and aligned with the opening on the plug block 13. The slots 14 are tightly engaged to ensure the stability of the connection between the lower box 11 and the upper box 12. Then, a permeable stone for the test is inserted into the filling slot 17 opened on the lower box 11, and then the rock and soil samples are inserted into the filling slots 17 opened on the lower box 11 and the upper box 12, and finally another permeable stone is inserted. At this time, the rock and soil samples are placed in the shear box and can be used in conjunction with other test components for testing. After the test is completed, when the rock and soil samples need to be taken out, an auxiliary tool can be used to hook into the hook slot 29, and the pull block 27 can be pulled to slide in the strip slot 28. At this time, the pull block 27 will use the rectangular block 26 and the extrusion sheet 23 to drive the card block 21 to slide, so that the card block 21 is separated from the plug block 13. Then, the upper box 12 can be removed, and the rock and soil samples and the permeable stone can be taken out.

[0034] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A rock and soil direct shear test device, characterized in that: include: A test mechanism (1), the test mechanism (1) comprising a lower box (11), an upper box (12) being arranged on the top of the lower box (11), a fixing mechanism (2) being arranged inside the lower box (11), the fixing mechanism (2) comprising a card block (21), the card block (21) being arranged inside the lower box (11), one end of the card block (21) being fixedly connected to a connecting column (22), one end of the connecting column (22) being away from the card block (21) being fixedly connected to an extrusion sheet (23), the outer surface of the extrusion sheet (23) being A guide block (24) is fixedly connected to the surface, and the guide block (24) is placed in a guide groove opened inside the lower box (11). A spring (25) is provided on one side of the extrusion sheet (23), and two ends of the spring (25) are respectively fixedly connected to the outer surface of the extrusion sheet (23) and the inner wall of the lower box (11). A rectangular block (26) is fixedly connected to the outer surface of the extrusion sheet (23), and the rectangular block (26) passes through the interior of the lower box (11). The rectangular block (26) is slidably connected to the lower box (11).

2. A rock and soil direct shear test device according to claim 1, characterized in that: One end of the rectangular block (26) is fixedly connected to a pull block (27); a strip groove (28) matching with the pull block (27) is provided on the lower box (11); and a hook groove (29) is provided on the pull block (27).

3. A rock and soil direct shear test device according to claim 1, characterized in that: An insert block (13) is fixedly connected to one side of the upper box (12), and a slot matching the insert block (13) is provided on the lower box (11).

4. A rock and soil direct shear test device according to claim 3, characterized in that: The inserting block (13) is provided with a card slot (14), and a positioning block (15) is fixedly connected to a side surface of the upper box (12) close to the inserting block (13).

5. A rock and soil direct shear test device according to claim 4, characterized in that: The number of the positioning blocks (15) is two, and the lower box (11) is provided with positioning grooves that fit with the positioning blocks (15).

6. A rock and soil direct shear test device according to claim 5, characterized in that: One side of the upper box (12) is fixedly connected with a plug post (16), and the number of the plug posts (16) is four.

7. A rock and soil direct shear test device according to claim 1, characterized in that: The lower box (11) is provided with a cylindrical groove matched with the plug column (16), and the lower box (11) and the upper box (12) are both provided with a filling groove (17).

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