Rock-soil tensile test device

Abstract

The utility model discloses a rock-soil tensile test device. The testing device comprises a base and a top plate, a disc-shaped rock-soil test piece is arranged between the base and the top plate, and filler strips used for assisting an experiment are arranged on the upper side and the lower side of the disc-shaped rock-soil test piece. The positioning assembly is arranged on the base and is used for positioning the disc-shaped rock-soil test piece; the supporting and pushing assembly is arranged on the pressing machine and is used for supporting and pushing the two groups of filler strips. According to the rock-soil tensile test device disclosed by the utility model, in the process of testing the tensile property of rock-soil by using a disc splitting method, the tensile test of a disc-shaped rock-soil test piece is completed through the mutual matching of the supporting and pushing assembly and the lifting assembly, and in the whole test process, the tensile property of the disc-shaped rock-soil test piece is improved through the auxiliary action of the lifting assembly and the supporting and pushing assembly. The filler strips on the upper side and the lower side do not need to be installed, fixed and subsequently disassembled, and efficient tensile test operation on rock soil is facilitated.

Description

Technical Field

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

[0002] The tensile strength of rock is one of the main mechanical property indicators of rock, and it is also one of the main control parameters of rock mechanics, engineering structure design and stability analysis. At present, there are two main experimental methods for measuring the tensile strength of rock: indirect tensile method and direct tensile method. The direct tensile method is not widely used because of its cumbersome operation and strict requirements on test equipment and sample processing. Therefore, in most cases, people still use the indirect tensile method for measurement. The indirect tensile method mainly uses the Brazilian splitting method, using a disc-shaped specimen (height-to-diameter ratio of 1:2), and applying a linear load in the diameter direction of the specimen to cause it to fail along the diameter direction of the specimen.

[0003] During the disc splitting method for tensile testing of rock and soil, in order to keep the two sets of pads on both sides of the disc-shaped rock and soil specimen and prevent the test process from shifting, the upper pads need to be fixed. The fixing and subsequent removal of the pads affect the rhythm of the entire test and reduce the effect of the test. Utility Model Content

[0004] In order to solve the above technical problems, the utility model discloses a rock and soil tensile testing device for disc splitting method test. During the tensile test of the disc-shaped rock and soil specimen, the device does not need to install and fix the pads on the upper and lower sides and the subsequent disassembly, which is convenient for efficient tensile test operation of rock and soil.

[0005] In order to achieve the above technical purpose, the utility model provides a rock and soil tensile test device, including a base and a top plate, a disc-shaped rock and soil specimen is arranged between the base and the top plate, and pads for assisting the experiment are arranged on the upper and lower sides of the disc-shaped rock and soil specimen; the test device also includes a positioning component arranged on the base for positioning the disc-shaped rock and soil specimen, a lifting component arranged under the top plate for assisting the lifting and positioning of the upper pad, and a supporting and pushing component arranged on the press for supporting and pushing the two groups of pads;

[0006] The support and pushing assembly includes a first V-shaped block fixed above the base for supporting the lower pad, a second V-shaped block installed below the top plate for pushing the upper pad during the lifting process, and a first cylinder arranged on the top plate, wherein the piston end of the first cylinder vertically extends to the bottom of the top plate and is connected to the second V-shaped block;

[0007] The lifting components are provided in two groups, and the two groups of lifting components are arranged at the two ends of the disc-shaped geotechnical specimen; each group of lifting components includes a V-shaped support plate and a slide plate, and the slide plate is slidably connected to the bottom of the top plate through a sliding component, and the V-shaped support plate is connected to the slide plate through two groups of elastic components.

[0008] The better technical solution of the utility model is as follows: the positioning components are provided in two groups, and the two groups of positioning components are symmetrically arranged on both sides of the disc-shaped geotechnical specimen, each group of positioning components includes a support frame fixed on a base, and a second cylinder for pushing the side plate is installed on the support frame, and a side plate for positioning against the outer side of the disc-shaped geotechnical specimen is provided at the end of the second cylinder adjacent to the disc-shaped geotechnical specimen.

[0009] The better technical solution of the utility model is as follows: the sliding assembly of each lifting assembly includes two fixed seats fixed under the top plate, the slide plate is located between the two fixed seats of the corresponding sliding assembly, at least two guide rods are arranged between the two fixed seats, and the slide plate is slidably connected to the guide rods.

[0010] The better technical solution of the utility model: the two groups of elastic components of each lifting component are symmetrically arranged on both sides of the V-shaped support plate, and each group of elastic components includes a fixed block fixed on the corresponding side of the V-shaped support plate and a telescopic mechanism connecting the fixed block and the slide plate, the telescopic mechanism includes a sleeve fixed on the slide plate, a sliding rod slidably connected in the sleeve and a spring sleeved outside the sleeve, the end of the sliding rod is connected to the fixed block on the corresponding side, and the two ends of the spring are respectively connected to the slide plate and the fixed block.

[0011] Beneficial effects of the utility model:

[0012] The rock and soil tensile testing device of the utility model uses the disc splitting method to test the tensile properties of rock and soil. Through the cooperation of the supporting and pushing assembly and the lifting assembly, the tensile test of the disc-shaped rock and soil specimen is completed. In the whole test process, through the auxiliary role of the lifting assembly and the supporting and pushing assembly, there is no need to install and fix the pads on the upper and lower sides and the subsequent disassembly, which is convenient for efficient tensile test operation of rock and soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall appearance structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the support and push assembly of the utility model;

[0015] Figure 3 It is a schematic diagram of the structure of the lifting component, elastic component and sliding component of the utility model.

[0016] In the figure: 101-base; 102-top plate; 103-disc-shaped geotechnical specimen; 104-pad; 201-support frame; 202-side plate; 203-second cylinder; 301-first V-shaped block; 302-second V-shaped block; 303-first cylinder; 401-V-shaped support plate; 402-slide plate; 501-fixed block; 502-casing; 503-slide rod; 504-spring; 601-fixed seat; 602-guide rod. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model.

[0018] The embodiment provides a rock and soil tensile test device, such as Figures 1 to 3 As shown, it includes a press for rock and soil disc splitting method experiments, the press includes a base 101 and a top plate 102, a disc-shaped rock and soil specimen 103 is arranged between the base 101 and the top plate 102, and pads 104 for assisting experiments are respectively arranged on the upper and lower sides of the disc-shaped rock and soil specimen 103; the test device also includes a positioning component arranged on the base 101 for positioning the disc-shaped rock and soil specimen 103, a lifting component arranged under the top plate 102 for assisting in lifting and positioning the upper pad 104, and a supporting and pushing component arranged on the press for supporting and pushing two groups of pads 104, and the lifting component is provided in two groups, and the two groups of lifting components are arranged at the two ends of the disc-shaped rock and soil specimen 103.

[0019] In the process of testing the tensile properties of rock and soil using the disc splitting method, the tensile test of the disc-shaped rock and soil specimen 103 is completed through the cooperation of the support and pushing assembly and the lifting assembly. In the entire test process, through the auxiliary role of the lifting assembly and the support and pushing assembly, there is no need to install and fix the pads 104 on the upper and lower sides and subsequent disassembly, which facilitates efficient tensile test operations on rock and soil.

[0020] In the embodiment, the supporting push component, such as Figure 1 and Figure 2As shown, it includes a first V-shaped block 301 fixed on the top of the base 101 for supporting the lower pad 104 and a second V-shaped block 302 installed under the top plate 102 for pushing the upper pad 104 during the lifting process. A first cylinder 303 for pushing the second V-shaped block 302 is arranged on the top plate 102, and the second V-shaped block 302 is installed on the piston end of the first cylinder 303; after the disc-shaped geotechnical specimen 103 is positioned and placed, the second V-shaped block 302 is pushed down by the first cylinder 303. During the downward movement of the second V-shaped block 302, the second V-shaped block 302 is abutted against the upper pad 104 in the lifting state. During the abutment process, the pad on the V-shaped supporting plate 401 is synchronously lowered with the descent of the second V-shaped block 302 under the elastic connection of the elastic component and abuts and squeezes against the upper side of the disc-shaped geotechnical specimen 103, thereby completing the tensile test of the disc-shaped geotechnical specimen 103.

[0021] In the embodiment, each lifting assembly includes a V-shaped support plate 401 and a slide plate 402, wherein the slide plate 402 is slidably connected to the bottom of the top plate 102 through a sliding assembly, and the V-shaped support plate 401 is connected to the slide plate 402 through two sets of elastic assemblies; Figure 2 and Figure 3 As shown, the sliding assembly includes two fixing seats 601 fixed below the top plate 102, the sliding plate 402 is located between the two fixing seats 601, at least two guide rods 602 are provided between the two fixing seats 601, and the sliding plate 402 is slidably connected to the guide rods 602. Figure 3 As shown, two groups of elastic components are symmetrically arranged on both sides of the V-shaped support plate 401, and each group of elastic components includes a fixed block 501 fixed to the corresponding side of the V-shaped support plate 401 and a telescopic mechanism connecting the fixed block 501 and the slide plate 402, the telescopic mechanism includes a sleeve 502 fixed to the slide plate 402, a slide rod 503 slidably connected in the sleeve and a spring 504 sleeved outside the sleeve 502, the end of the slide rod 503 is connected to the fixed block 501 on the corresponding side, and the two ends of the spring 504 are respectively connected to the slide plate 402 and the fixed block 501, through the sleeve 502, the slide rod 503 and the spring 504, the elastic telescopic between the V-shaped support plate 401 and the slide plate 402 is facilitated.

[0022] During the process of pressurizing the pad strips 104 and the disc-shaped geotechnical specimen 103, the lower pad strips 104 are positioned and placed on the first V-shaped block 301, and the upper pad strips 104 are then placed on the V-shaped support plates 401 of the two lifting assemblies. Through the sliding action of the fixing seat 601 and the guide rod 602, the positions of the slide plate 402 and the V-shaped support plate 401 can be adjusted, and pad strips 104 of different lengths can be lifted.

[0023] In the embodiment, two groups of positioning components are provided, such as Figure 1As shown, two groups of positioning components are symmetrically arranged on both sides of the disc-shaped geotechnical specimen 103, and each group of positioning components includes a support frame 201 fixed on the base 101, and a second cylinder 203 for pushing the side plate 202 is installed on the support frame 201. A side plate 202 for abutting against the outer side of the disc-shaped geotechnical specimen 103 is provided at the end of the second cylinder 203 adjacent to the disc-shaped geotechnical specimen 103; the side plate 202 is pushed to abut against one side of the disc-shaped geotechnical specimen 103 through the second cylinder 203 on the support frame 201, so as to position the placed disc-shaped geotechnical specimen 103.

[0024] In the process of testing the tensile properties of rock and soil using the disc splitting method, the rock and soil to be tested is processed into a disc shape and placed on a press. The bottom of the disc-shaped rock and soil specimen 103 contacts the lower pad on the first V-block 301. The second V-block 302 is pushed down by the first cylinder 303 to press the upper pad, so that the two groups of pads 104 are respectively pressed against the upper and lower sides of the disc-shaped rock and soil specimen 103. During the extrusion process, the disc-shaped rock and soil specimen 103 produces tensile damage in the radial direction to obtain its tensile strength. During the test, the pad 104 is used to convert the applied pressure into a linear load, and to make the disc-shaped rock and soil specimen 103 produce a tensile force perpendicular to the direction of the upper and lower loads, thereby completing the tensile test operation of the disc-shaped rock and soil specimen 103;

[0025] In the process of pressurizing the pads 104 and the disc-shaped geotechnical specimen 103, the lower pads 104 are positioned and placed on the first V-shaped block 301, and then the upper pads 104 are placed on the V-shaped support plates 401 of the two groups of lifting components. After the two groups of pads 104 are placed, the disc-shaped geotechnical specimen 103 is placed between the two groups of pads 104 and abuts against the lower pads 104. The placed disc-shaped geotechnical specimen 103 is positioned by the positioning component. After the disc-shaped geotechnical specimen 103 is positioned and placed, the second V-shaped block 302 is pushed downward by the first cylinder 303, and the second V-shaped block 302 is pushed downward by the second V-shaped block 302. During the descending movement of 302, the second V-block 302 abuts against the upper pad 104 in the lifting state. During the abutting process, the pad 104 on the V-shaped support plate 401 descends synchronously with the descending of the second V-block 302 under the elastic connection of the elastic component and abuts and squeezes against the upper side of the disc-shaped geotechnical specimen 103, completing the tensile test of the disc-shaped geotechnical specimen 103. During the entire test, through the auxiliary action of the lifting component and the supporting and pushing component, there is no need to install and fix the pads 104 on the upper and lower sides and subsequent disassembly, which is convenient for efficient tensile test operations on geotechnical specimens.

Claims

1. A rock and soil tensile test device, comprising a base (101) and a top plate (102), a disc-shaped rock and soil specimen (103) being arranged between the base (101) and the top plate (102), and pads (104) for assisting the experiment being arranged on the upper and lower sides of the disc-shaped rock and soil specimen (103); characterized in that: The test device also includes a positioning assembly arranged on the base (101) for positioning the disc-shaped rock and soil test piece (103), a lifting assembly arranged below the top plate (102) for assisting the lifting and positioning of the upper pad strips, and a supporting and pushing assembly arranged on the press for supporting and pushing the two groups of pad strips (104); The support and pushing assembly comprises a first V-shaped block (301) fixed above the base (101) for supporting the lower pad, a second V-shaped block (302) installed below the top plate (102) for pushing the upper pad during lifting, and a first cylinder (303) arranged on the top plate (102), wherein the piston end of the first cylinder (303) extends vertically to the bottom of the top plate (102) and is connected to the second V-shaped block (302); The lifting components are provided in two groups, and the two groups of lifting components are arranged at the two ends of the disc-shaped geotechnical specimen (103); each group of lifting components includes a V-shaped supporting plate (401) and a sliding plate (402), and the sliding plate (402) is slidably connected to the bottom of the top plate (102) through a sliding component, and the V-shaped supporting plate (401) is connected to the sliding plate (402) through two groups of elastic components.

2. A rock and soil tensile test device according to claim 1, characterized in that: The positioning components are provided in two groups, and the two groups of positioning components are symmetrically arranged on both sides of the disc-shaped geotechnical specimen (103). Each group of positioning components comprises a support frame (201) fixed on the base (101), and a second cylinder (203) for pushing the side plate (202) is installed on the support frame (201). The end of the second cylinder (203) adjacent to the disc-shaped geotechnical specimen (103) is provided with a side plate (202) for abutting against the outer side of the disc-shaped geotechnical specimen (103) for positioning.

3. A rock and soil tensile test device according to claim 1 or 2, characterized in that: The sliding assembly of each lifting assembly includes two fixed seats (601) fixed below the top plate (102), the sliding plate (402) is located between the two fixed seats (601) of the corresponding sliding assembly, at least two guide rods (602) are provided between the two fixed seats (601), and the sliding plate (402) is slidably connected to the guide rods (602).

4. A rock and soil tensile test device according to claim 1 or 2, characterized in that: The two groups of elastic components of each lifting component are symmetrically arranged on both sides of the V-shaped support plate (401), and each group of elastic components includes a fixed block (501) fixed on the corresponding side of the V-shaped support plate (401) and a telescopic mechanism connecting the fixed block (501) and the slide plate (402), the telescopic mechanism includes a sleeve (502) fixed on the slide plate (402), a sliding rod (503) slidably connected in the sleeve, and a spring (504) sleeved outside the sleeve (502), the end of the sliding rod (503) is connected to the fixed block (501) on the corresponding side, and the two ends of the spring (504) are respectively connected to the slide plate and the fixed block (501).

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