Shearing device for multi-specification cubic rock samples

Abstract

The utility model discloses a shearing device for multi-specification cubic rock samples, which belongs to the technical field of rock shearing tests, and comprises a shearing device and a shearing box, the shearing box comprises an upper shearing box body and a lower shearing box body, and the upper shearing box body is buckled above the lower shearing box body; the shear box comprises an upper shear box body and a lower shear box body, the upper shear box body and the lower shear box body each comprise main body pieces located on the two sides and lengthening pieces detachably connected with the main body pieces on the two sides, each lengthening piece is of an approximate U-shaped structure, and the length of the shear box is adjusted by replacing the lengthening pieces with different lengths; and the shearing box is placed in a shearing device for a shearing test. According to the shearing device for the multi-specification cubic rock samples, the size of the shearing box can be changed according to the rock samples of different specifications, the universality and the practicability of the test are enhanced, meanwhile, laboratory resources are saved, and a more effective test device is provided for rock and soil mechanics research.

Description

TECHNICAL FIELD

[0001] The utility model relates to rock shearing test technical field especially relates to a shearing device for multi-specification cubic rock sample. BACKGROUND

[0002] In the field of geotechnical engineering, direct shear test is a commonly used method for testing the mechanical properties of rock. However, the traditional direct shear test equipment has the characteristics of insufficient representative and poor adaptability of test results. Specifically, using only standard samples for testing cannot simulate actual engineering conditions, so the strength parameters obtained by direct shear test cannot truly reflect the behavior of rock under complex conditions.

[0003] In recent years, with the continuous progress of geotechnical engineering theory and experimental technology, direct shear test research on multi-specification rock samples has gradually increased. However, different specifications of rock samples require specially customized shear boxes matching their sizes, and the preparation of a large number of shear boxes not only costs a lot, but also wastes resources. In addition, the shear box will produce out-of-plane displacement during the direct shear test, affecting the shear displacement value of the test.

[0004] In order to overcome the above problems, a shearing device for multi-specification cubic rock samples is proposed, which can not only handle different specifications of rock samples, but also effectively improve the accuracy and reliability of the test. SUMMARY

[0005] In order to solve the above problems in the prior art, the purpose of the utility model is to provide a shearing device for multi-specification cubic rock samples, which can change the size of the shear box according to different specifications of rock samples, enhance the versatility and practicality of the test, and save laboratory resources, providing a more effective test device for geotechnical mechanics research.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A shearing device for multi-specification cubic rock samples is provided, which includes a shearing device and a shear box. The shear box includes an upper shear box body and a lower shear box body. The upper shear box body is fastened above the lower shear box body.

[0008] The upper shear box body and the lower shear box body each include a main body on both sides and a lengthening piece detachably connected to the main body on both sides. The lengthening piece is approximately U-shaped in structure. By replacing lengthening pieces of different lengths, the length of the shear box can be adjusted.

[0009] The shear box is placed in the shearing device for shearing test.

[0010] Further, the contact surface of the main body and the lengthening piece is provided with a connecting slot, and the mortise and tenon connecting piece is inserted into the connecting slot to connect the lengthening piece and the main body.

[0011] Further, the shearing device comprises a base, four vertical columns are arranged on the upper portion of the base, a cavity structure for testing is formed between the vertical columns, a top plate is arranged on the upper portion of the vertical columns, and a vertical actuator is connected to the lower portion of the top plate.

[0012] Further, the shearing device comprises a base, four vertical columns are arranged on the upper portion of the base, a cavity structure for testing is formed between the vertical columns, a top plate is arranged on the upper portion of the vertical columns, and a vertical actuator is connected to the lower portion of the top plate.

[0013] Further, the shearing device comprises a base, four vertical columns are arranged on the upper portion of the base, a cavity structure for testing is formed between the vertical columns, a top plate is arranged on the upper portion of the vertical columns, and a vertical actuator is connected to the lower portion of the top plate.

[0014] Further, the shearing device comprises a base, four vertical columns are arranged on the upper portion of the base, a cavity structure for testing is formed between the vertical columns, a top plate is arranged on the upper portion of the vertical columns, and a vertical actuator is connected to the lower portion of the top plate.

[0015] Further, the shearing device further comprises a limiting plate, and the limiting plate is arranged on the front and rear sides of the shearing device and connected to the vertical columns on the two sides.

[0016] Further, the inner side surface of the limiting plate is provided with a pulley.

[0017] Compared with the prior art, the shearing device for the multi-specification cubic rock sample has the advantages that:

[0018] 1. The shearing device for the multi-specification cubic rock sample can be assembled by customizing lengthening pieces and main bodies with different lengths, so that the inner cavity size of the shearing box can be changed to match the multi-specification cubic rock sample, and the shearing device has the characteristics of simple installation and operation and saving of laboratory resources.

[0019] 2. The limiting plate arranged on the shearing device can effectively limit the out-of-plane displacement in the shearing process, thereby improving the accuracy of the shearing test.

[0020] 3. The ball on the wear-resistant plate can reduce the friction between the shearing box and the pedestal, avoid the wear of the shearing box during the test, and improve the test accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0021] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments made with reference to the accompanying drawings:

[0022] Fig. 1 It is a structural schematic diagram of the utility model;

[0023] Fig. 2 It is a structural schematic diagram of the shearing device cavity;

[0024] Fig. 3 It is a structural schematic diagram of the shearing box;

[0025] Fig. 4 It is a split diagram of the shearing box;

[0026] Fig. 5 It is a structural schematic diagram of the wear-resistant plate;

[0027] Fig. 6 It is a structural schematic diagram of the limiting plate.

[0028] In the figure: 1 - upper shearing box body, 2 - lower shearing box body, 3 - main body, 4 - lengthening piece, 5 - mortise and tenon connecting piece, 6 - base, 7 - stand column, 8 - top plate, 9 - vertical actuator, 10 - jack, 11 - horizontal actuator, 12 - pedestal, 13 - wear-resistant plate, 14 - ball, 15 - limiting plate, 16 - pulley. DETAILED DESCRIPTION

[0029] The application will be described in further detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and not to limit the utility model. In addition, it should be noted that, for the convenience of description, only the parts related to the utility model are shown in the drawings.

[0030] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and embodiments.

[0031] As Figs. 1-2 shown, the embodiment provides a shearing device for multi-specification cubic rock sample, which comprises a shearing device and a shearing box, and the shearing box can be put into the shearing device for detection.

[0032] In the embodiment, the size of the shearing box can be adjusted according to the test requirement. Specifically, as Figs. 3-4As shown, the shear box includes an upper shear box body 1 and a lower shear box body 2, the upper shear box body 1 is buckled above the lower shear box body 2. The upper shear box body 1 and the lower shear box body 2 are similar in structure, both including a main body piece 3 on both sides and a lengthening piece 4 detachably connected with the main body piece 3 on both sides, the lengthening piece 4 is approximately U-shaped structure, the lengthening piece 4 is detachably mounted between the two main body pieces 3, the length of the shear box can be adjusted by replacing the lengthening piece 4 of different length. In the embodiment, the lengthening piece 4 and the main body piece 3 are connected by mortise and tenon structure. Specifically, the contact surface of the main body piece 3 and the lengthening piece 4 is provided with a connecting slot, and a mortise and tenon connecting piece 5 is inserted into the connecting slot to connect the lengthening piece 4 and the main body piece 3. The material of the shear box in the embodiment is selected from 45# steel, the inner cavity of the shear box is consistent with the size of the cubic rock-soil sample to be tested, and the lengthening piece 4 is customized with a lengthening size according to different specifications of the cubic rock-soil sample.

[0033] The shear device includes a base 6, the upper side of the base 6 is provided with a column 7 at four corners, the column 7 forms a cavity structure for testing between the columns 7, the upper side of the column 7 is provided with a top plate 8, a vertical actuator 9 is connected below the top plate 8, the center of the vertical actuator 9 and the center of the upper surface of the upper shear box are located on the same vertical axis, and the vertical actuator 9 applies a normal pressure to the shear box. The cavity of the shear device is provided with a jack 10 and a horizontal actuator 11 respectively located on the left and right sides, the jack 10 is in contact with the side surface of the upper shear box body 1, the horizontal actuator 11 is in contact with the side surface of the lower shear box body 2, the center of the horizontal actuator 11 and the center of the side surface of the lower shear box body 2 are located on the same horizontal axis, and the horizontal actuator 11 applies a horizontal force to the lower shear box body 2 along the loading direction.

[0034] The cavity of the shear device is also provided with a pedestal 12 above the base 6, the upper end surface of the pedestal 12 is a wear-resistant plate 13, and the shear box is placed on the wear-resistant plate 13. As shown in Fig. 5 , the wear-resistant plate 13 is provided with a hole, and a ball 14 is placed in the hole, the ball 14 can roll, the ball 14 on the wear-resistant plate 13 can reduce the friction between the shear box and the pedestal 12, avoid the wear of the shear box during the test process, and improve the test accuracy.

[0035] The shear device also includes a limiting plate 15, the limiting plate 15 is located on the front and rear sides of the shear device and connected with the columns 7 on both sides. Specifically, the column 7 is provided with a bolt hole, and the limiting plate 15 is connected with the column 7 by a bolt. In addition, as shown in Fig. 6As shown, the inner side of the limiting plate 15 is provided with a pulley 16, and the pulleys 16 on the two limiting plates 15 are respectively in contact with the front and back surfaces of the shear box. The front and back sides of the shear box are limited through the pulleys 16, and the friction between the pulleys 16 and the shear box is small, which greatly reduces the rigidity of the limiting plate 15 on the mechanical behavior of the test process, and improves the test precision.

[0036] Test method:

[0037] S1: sampling and preparation of different specifications of cubic rock samples, specifically, preparing 100mm*100mm*100mm, 100mm*100mm*150mm and 100mm*100mm*200mm cubic rock samples with fissures;

[0038] S2: placing the wear-resistant plate 13 on the pedestal 12;

[0039] S3: selecting a lengthened piece 4 with a corresponding length according to the size of the cubic rock sample, and connecting the lengthened piece 4 with the main piece 3, placing the cubic rock sample in the lower shear box body 2, and buckling the upper shear box body 1, and placing the assembled shear box on the wear-resistant plate 13;

[0040] S4: fixing the limiting plate 15 with the column 7 using a bolt, and keeping the pulleys 16 on the two limiting plates 15 in contact with the front and back surfaces of the shear box;

[0041] S5: using the computer system matched with the shear device to control the vertical actuator 9 to apply a normal load to the assembled shear box as a whole, keeping the side limiting jack 10 in contact with the side surface of the upper shear box body 1, starting the side horizontal actuator 11 to apply a tangential load to the side surface of the lower shear box body 2, and recording the test data in real time by the computer system until the test is completed;

[0042] S6: arranging and analyzing the test data, thereby providing support for the study of the shear failure mechanism of different specifications of cubic rock samples.

[0043] Those skilled in the art should understand that the utility model range involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the utility model concept. For example, the above features are replaced with the technical features disclosed in the present application (but not limited to) having similar functions to form technical solutions.

Claims

1. A shear device for multi-specification cubic rock samples, characterized by, The application relates to a shearing device and a shearing box, wherein the shearing box comprises an upper shearing box body (1) and a lower shearing box body (2), and the upper shearing box body (1) is buckled above the lower shearing box body (2). The upper shearing box body (1) and the lower shearing box body (2) both comprise main bodies (3) at two sides and lengthening pieces (4) which are detachably connected with the main bodies (3) at the two sides, the lengthening pieces (4) are approximately U-shaped structures, and the length of the shearing box is adjusted by replacing the lengthening pieces (4) with different lengths. The shearing box is placed in the shearing device for shearing test.

2. A shear device for multi-specimen cubic rock samples according to claim 1, wherein, Connecting grooves are formed in the contact surfaces of the main bodies (3) and the lengthening pieces (4), and a mortise and tenon connector (5) is inserted into the connecting grooves to connect the lengthening pieces (4) and the main bodies (3).

3. A shear device for multi-specimen cubic rock samples according to claim 1, wherein, The shearing device comprises a base (6), four vertical columns (7) are arranged above the base (6), a cavity structure for test is formed between the vertical columns (7), a top plate (8) is arranged above the vertical columns (7), and a vertical actuator (9) is connected below the top plate (8).

4. A shear device for multi-specimen cubic rock samples according to claim 3, wherein, Jack screws (10) and horizontal actuators (11) are arranged in the cavity of the shearing device, the jack screws (10) are in contact with the side surfaces of the upper shearing box body (1), and the horizontal actuators (11) are in contact with the side surfaces of the lower shearing box body (2).

5. The apparatus for shearing multi-specimen cubic rock samples of claim 3, wherein, A pedestal (12) is arranged above the base (6) in the cavity of the shearing device, the upper end surface of the pedestal (12) is an anti-abrasion plate (13), and the shearing box is placed on the anti-abrasion plate (13).

6. A shear device for multi-specimen cubic rock samples according to claim 5, wherein, Holes are formed in the anti-abrasion plate (13), and balls (14) are arranged in the holes.

7. The apparatus for shearing multi-specimen cubic rock samples of claim 3, wherein, The shearing device further comprises limiting plates (15), and the limiting plates (15) are arranged on the front and back sides of the shearing device and connected with the vertical columns (7) at the two sides.

8. A shear device for multi-specimen cubic rock samples according to claim 7, wherein, Sliding wheels (16) are arranged on the inner side surfaces of the limiting plates (15).

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