AU2019392985B2 - Sample preparation mould for shear test of rock mass discontinuities - Google Patents
Sample preparation mould for shear test of rock mass discontinuities Download PDFInfo
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- AU2019392985B2 AU2019392985B2 AU2019392985A AU2019392985A AU2019392985B2 AU 2019392985 B2 AU2019392985 B2 AU 2019392985B2 AU 2019392985 A AU2019392985 A AU 2019392985A AU 2019392985 A AU2019392985 A AU 2019392985A AU 2019392985 B2 AU2019392985 B2 AU 2019392985B2
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- 239000011435 rock Substances 0.000 title claims abstract description 48
- 238000012360 testing method Methods 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims description 61
- 238000013461 design Methods 0.000 abstract description 3
- 238000011160 research Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000008602 contraction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A sample making die for a rock body structural surface shear test. In order to process shear test samples of rock body structural surfaces of different sizes and shapes so as to meet the research needs of shear characteristics of the rock body structural surfaces, the sample making die comprises a die body of a semi-open space surrounded by a front vertical plate (1), a rear vertical plate (2), a left side plate (3), a right side plate (4) and a bottom plate (5). The left side plate (3) and the right side plate (4) are both L-shaped. The left side plate (3) comprises a left side vertical plate (31) and a left side bottom plate (32). The right side plate (4) comprises a right side rear vertical plate (41) and a right side vertical plate (42). The sample making die further comprises a support (6), and the support (6) is provided at a lower side of the bottom plate (5) and is used for supporting the bottom plate (5). The structural design of the sample making die for the rock body structural surface shear test may comply with the fabrication of rock body structural surface shear test samples of different sizes and shapes.
Description
The present invention belongs to the field of laboratory tests of rock mass mechanics, and particularly relates to a sample preparation mould for a shear test of rock mass discontinuities.
The discontinuities of the rock mass are formed in the development process of the geological history of the rock mass. Featuring a certain extension direction and length as well as a small thickness, they control the deformation and mechanical behavior of the rock mass. The accurate acquiring of the mechanical properties of the discontinuities is the core of evaluating the stability of engineering rock mass. The mechanical properties of the discontinuities of the rock mass mainly include normal deformation, shear deformation and shear strength. In low-stress areas, engineering rock mass instability is mainly reflected in the shear deformation failure of the rock mass along the discontinuities. Therefore, the shear strength of the discontinuities is often used as an important index for the stability evaluation of engineering rock mass.
The laboratory research of rock mass mechanics is the basis for the construction of the constitutive model and numerical simulation of engineering design for the rock mass. The laboratory direct shear test has great advantages in loading path control and normal parameter as well as shear parameter acquisition. It is the preferred test method to characterize the shear behavior of the discontinuities. The shear test of the discontinuities is a destructive and non-repeatable test, and the costs of sampling, transportation and sample preparation of natural rock mass samples with discontinuities are high. Therefore, cement mortar, high-strength gypsum, concrete and other rock materials are widely used in the existing research to make artificial rock mass samples with discontinuities. The artificial rock mass samples with discontinuities are subjected to parallel tests to achieve the purpose of studying the shear characteristics of the discontinuities of natural rock mass.
Any discussion of documents, acts, materials, devices, articles or the like which has been included in the present specification is not to be taken as an admission that any or all of these matters form part of the prior art base or were common general knowledge in the field relevant to the present disclosure as it existed before the priority date of each of the appended claims.
Throughout this specification the word "comprise", or variations such as "comprises" or
"comprising", will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps.
The present disclosure proposes a new sample preparation mould for preparing rock mass samples with discontinuities of different sizes and shapes for the shear test, so as to assist in the study of the shear characteristics of rock mass discontinuities.
The present disclosure proposes a sample preparation mould for a shear test of rock mass discontinuities. The sample preparation mould is usable to study the shear characteristics of rock mass discontinuities by preparing rock mass samples with discontinuities of different sizes and shapes for the shear test. The sample preparation mould includes a mould body with a semi-open space surrounded by a front vertical plate, a rear vertical plate, a left side plate, a right side plate and a bottom plate, where the left side plate and the right side plate are both L-shaped; the left side plate includes a left side vertical plate and a left side bottom plate; the right side plate includes a right side rear vertical plate and a right side vertical plate; the sample preparation mould further includes a support; the support is provided under the bottom plate to prop up the bottom plate.
A first pin is provided at a connection between the left side vertical plate and the left side bottom plate of the L-shaped left side plate along a width direction of the left side vertical plate; an elongated groove with a leftward opening matching the first pin is provided at a lower part of the front vertical plate along a length direction of the front vertical plate; and the elongated groove allows the first pin to pass through and fix the left side plate and the front vertical plate by a bolt.
An inner side of the left side vertical plate is horizontally provided with a second pin and a third pin; a left end of a lower side of the bottom plate is horizontally provided with a first U-shaped fork and a second U-shaped fork with a downward opening matching the second pin and the third pin respectively; and an inner side of the first U-shaped fork and an inner side of the second U-shaped fork allow the second pin and the third pin to respectively pass through and fix the left side plate and the bottom plate by bolts.
A rear area on an upper side of the bottom plate is horizontally provided with a fourth pin and a fifth pin; an outer side of the rear vertical plate is horizontally provided with a third U-shaped fork and a fourth U-shaped fork with a rear opening matching the fourth pin and the fifth pin respectively; and an inner side of the third U-shaped fork and an inner side of the fourth U-shaped fork allow the fourth pin and the fifth pin to respectively pass through and fix the bottom plate and the rear vertical plate by bolts.
Relative positions of the elongated groove of the front vertical plate and the first pin, relative positions of the first U-shaped fork on the lower side of the bottom plate and the second pin, relative positions of the second U-shaped fork and the third pin, relative positions of the third U-shaped fork on the outer side of the rear vertical plate and the fourth pin and relative positions of the fourth U-shaped fork and the fifth pin are all adjustable, so that the sample preparation mould is able to prepare rock mass samples with discontinuities of different sizes and shapes for the shear test.
In a preferred implementation of the sample preparation mould for a shear test of rock mass discontinuities, at least one row of through bolt holes are horizontally provided on an inner side of the rear vertical plate; at least one row of semi-through bolt holes matching the through bolt holes are horizontally provided on an outer side of the right side rear vertical plate; after the outer side of the right side rear vertical plate abuts against the inner side of the rear vertical plate, bolts are allowed to pass through the through bolt holes and penetrate into the semi-through bolt holes to fix the rear vertical plate and the right side plate.
In a preferred implementation of the sample preparation mould for a shear test of rock mass discontinuities, the through bolt holes and the semi-through bolt holes each are in two rows; a number of the semi-through bolt holes in each row is less than or equal to a number of the through bolt holes in each row; and/or after the rear vertical plate is fixed to the right side plate, a left end of the right side rear vertical plate abuts against an inner side of the left side vertical plate, and a front end of the right side vertical plate is in contact with the front vertical plate.
In a preferred implementation of the sample preparation mould for a shear test of rock mass discontinuities, an inner side of the right side rear vertical plate is straight or zigzag.
In a preferred implementation of the sample preparation mould for a shear test of rock mass discontinuities, the support includes an upper end cap, a lower end cap and a telescopic rod located between the upper end cap and the lower end cap; the telescopic rod includes a first rod, a second rod nested in the first rod, a third rod nested in the second rod and a fourth rod nested in the third rod; the first rod and the second rod are connected by a first threaded fastener, and a length of the second rod extending from the first rod is adjusted by rotating the first threaded fastener; the second rod and the third rod are connected by a second threaded fastener, and a length of the third rod extending from the second rod is adjusted by rotating the second threaded fastener; the third rod and the fourth rod are connected by a third threaded fastener, and a length of the fourth rod extending from the third rod is adjusted by rotating the third threaded fastener.
In a preferred implementation of the sample preparation mould for a shear test of rock mass discontinuities, a first groove is provided on the lower side of the bottom plate, and a second groove is provided on an upper side of the left side bottom plate; the upper end cap of the support is embedded in the first groove, and the lower end cap of the support is embedded in the second groove; in this way, the support is fixed between the bottom plate and the left side bottom plate.
In the sample preparation mould provided by the present invention, the L-shaped left side plate and the L-shaped right side plate form a semi-open space with the front vertical plate, the rear vertical plate and the bottom plate, and the bottom plate is propped up by a support. In some specific implementations, according to the structural design of the sample preparation mould of the present invention, relative positions of the elongated groove of the front vertical plate and the first pin, relative positions of the first U-shaped fork on the lower side of the bottom plate and the second pin, relative positions of the second U-shaped fork and the third pin, relative positions of the third U-shaped fork on the outer side of the rear vertical plate and the fourth pin and relative positions of the fourth U-shaped fork and the fifth pin are all adjustable. Further, the support is telescopic. In this way, the sample preparation mould is able to prepare rock mass samples with discontinuities of different sizes and shapes for the shear test.
FIG. 1 is a front view of a sample preparation mould according to an example of the present invention.
FIG. 2 is a left view of the sample preparation mould according to an example of the present invention.
FIG. 3 is a top view of the sample preparation mould according to an example of the present invention.
FIG. 4a is a front view of a left side plate of the sample preparation mould according to an example of the present invention.
FIG. 4b is a top view of the left side plate of the sample preparation mould according to an example of the present invention.
FIG. 5 is a front view of a front vertical plate of the sample preparation mould according to an example of the present invention.
FIG. 6a is a front view of a bottom plate of the sample preparation mould according to an example of the present invention.
FIG. 6b is a left view of the bottom plate of the sample preparation mould according to an example of the present invention.
FIG. 7a is a front view of a rear vertical plate of the sample preparation mould according to an example of the present invention.
FIG. 7b is a top view of the rear vertical plate of the sample preparation mould according to an example of the present invention.
FIG. 8a is a front view of a right side plate of the sample preparation mould according to an example of the present invention.
FIG. 8b is a top view of the right side plate of the sample preparation mould according to an example of the present invention.
FIG. 9a is a structural view of a support (in a contraction state) of the sample preparation mould according to an example of the present invention.
FIG. 9b is a structural view of the support (in an extension state) of the sample preparation mould according to an example of the present invention.
In order to make the examples, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention are clearly and completely described below with reference to the accompanying drawings. Apparently, the described examples are part rather than all of the examples. Those skilled in the art should understand that the implementations herein are merely intended to explain the technical principles of the present invention, rather than to limit the protection scope of the present invention.
FIG. 1 is a front view of a sample preparation mould according to an example of the present invention; FIG. 2 is a left view of the sample preparation mould according to an example of the present invention; FIG. 3 is a top view of the sample preparation mould according to an example of the present invention. As shown in FIGS. 1 to 3, the sample preparation mould for a shear test of rock mass discontinuities according to the present invention includes a front vertical plate 1, a rear vertical plate 2, a left side plate 3, a right side plate 4, a bottom plate 5 and a support 6. The front vertical plate 1, the rear vertical plate 2, the left side plate 3, the right side plate 4 and the bottom plate 5 surround a mould body with a semi-open space. The support 6 is provided under the bottom plate 5 to prop up the bottom plate 5. The left side plate 3 and the right side plate 4 are both L-shaped. The structures of the left side plate 3 and the right side plate 4, the connection relationships between the left side plate 3/the right side plate 4 and the front vertical plate 1, the rear vertical plate 2 and the bottom plate 5, the support 6 and the connection relationship of thereof are further described below with reference to FIGS. 4a to 9b.
FIG. 4a is a front view of a left side plate of the sample preparation mould according to an example of the present invention; FIG. 4b is a top view of the left side plate of the sample preparation mould according to an example of the present invention. As shown in FIGS. 4a and 4b, the L-shaped left side plate 3 includes a left side vertical plate 31 and a left side bottom plate 32. A first pin 33 is provided at a connection between the left side vertical plate 31 and the left side bottom plate 32 along a width direction of the left side vertical plate 31. FIG. 4b shows that the first pin 33 points forward.
FIG. 5 is a front view of a front vertical plate of the sample preparation mould according to an example of the present invention. As shown in FIG. 5, an elongated groove 11 with a leftward opening matching the first pin 33 is provided at a lower part of the front vertical plate 1 along a length direction of the front vertical plate 1. Further, both upper and lower sides of a left end of the elongated groove 11 are sharpened, and a right end of the elongated groove 11 is semicircular. When the front vertical plate 1 and the left side plate 3 are assembled, the elongated groove 11 allows the first pin 33 to pass through and fix the left side plate 3 and the front vertical plate 1 by a bolt M. For example, after the first pin 33 passes through the elongated groove 11, the bolt M rotates on the first pin 33 to tighten the elongated groove 11, so as to fasten the left side plate 3 and the front vertical plate 1. Preferably, the first pin 33 is a cylindrical pin.
Referring to FIGS. 4a and 4b, an inner side of the left side vertical plate 31 is horizontally provided with a second pin 34 and a third pin 35. Specifically, the second pin 34 and the third pin 35 have the same structure, and are horizontally (side by side) and adjacently disposed in a lower area inside the left side vertical plate 31 along a length direction of the left side vertical plate 31 (that is, along the left side plate from back to front). Preferably, the second pin 34 and the third pin 35 are cylindrical pins.
FIG. 6a is a front view of a bottom plate of the sample preparation mould according to an example of the present invention; FIG. 6b is a left view of the bottom plate of the sample preparation mould according to an example of the present invention. As shown in FIGS. 6a and 6b, a left end of a lower side of the bottom plate 5 is horizontally provided with a first U-shaped fork 51 and a second U-shaped fork 52 with a downward opening matching the second pin 34 and the third pin 35 respectively. When the left side plate 3 and the bottom plate 5 are assembled, an inner side of the first U-shaped fork 51 and an inner side of the second U-shaped fork 52 allow the second pin 34 and the third pin 35 to respectively pass through and fix the left side plate 3 and the bottom plate 5 by bolts M. For example, the second pin 34 passes through the first U-shaped fork 51 and the third pin 35 passes through the second U-shaped fork 52. The bolts M rotate on the second pin 34 and the third pin 35 to tighten the first U-shaped fork 51 and the second U-shaped fork 52 respectively, so as to fasten the left side plate 3 and the bottom plate 5. Referring to FIGS. 6a and 6b, a rear area on an upper side of the bottom plate 5 is horizontally provided with a fourth pin 53 and a fifth pin 54.
FIG. 7a is a front view of a rear vertical plate of the sample preparation mould according to an example of the present invention; FIG. 7b is a top view of the rear vertical plate of the sample preparation mould according to an example of the present invention. As shown in FIGS. 7a and 7b, an outer side of the rear vertical plate 2 is horizontally provided with a third U-shaped fork 21 and a fourth U-shaped fork 22 with a rear opening matching the fourth pin 53 and the fifth pin 54 respectively. When the rear vertical plate 2 and the bottom plate 5 are assembled, an inner side of the third U-shaped fork 21 and an inner side of the fourth U-shaped fork 22 allow the fourth pin 53 and the fifth pin 54 to respectively pass through and fix the bottom plate 5 and the rear vertical plate 2 by bolts M. For example, the fourth pin 53 passes through the third U-shaped fork 21 and the fifth pin 54 passes through the fourth U-shaped fork 22. The bolts M rotate on the fourth pin 53 and the fifth pin 54 to tighten the third U-shaped fork 21 and the fourth U-shaped fork 22 respectively, so as to fasten the rear vertical plate 2 and the bottom plate 5. Referring to FIGS. 7a and 7b, at least one row of through bolt holes 23 are horizontally provided on an inner side of the rear vertical plate 2. In this example, there are two rows of through bolt holes 23, four through bolt holes in each row.
FIG. 8a is a front view of a right side plate of the sample preparation mould according to an example of the present invention; FIG. 8b is a top view of the right side plate of the sample preparation mould according to an example of the present invention. As shown in
FIGS. 8a and 8b, the L-shaped right side plate 4 includes a right side rear vertical plate 41 and a right side vertical plate 42. At least one row of semi-through bolt holes 43 matching the through bolt holes 23 are horizontally provided on an outer side of the right side rear vertical plate 41. In this example, there are two rows of semi-through bolt holes 43, four semi-through bolt holes in each row. When the right side plate 4 and the rear vertical plate 2 are assembled, the outer side of the right side rear vertical plate 41 abuts against the inner side of the rear vertical plate 2. At this time, the semi-through bolt holes 43 are aligned with the through bolt holes 23. Bolts M are allowed to pass through the through bolt holes 23 and penetrate into the semi-through bolt holes 43 to fix the rear vertical plate 2 and the right side plate 4. Further, after the rear vertical plate 2 is fixed to the right side plate 4, a left end of the right side rear vertical plate 41 abuts against an inner side of the left side vertical plate 31, and a front end of the right side vertical plate 42 is in contact with the front vertical plate 1.
It should be noted that a length of the right side rear vertical plate 41 can be flexibly set, and a number of the semi-through bolt holes 43 varies with the size and shape of the right side rear vertical plate 41. For example, based on the length of the right side rear vertical plate 41 shown in FIGS. 8a and 8b, when the length of the right side rear vertical plate 41 is reduced by half, the number of the semi-through bolt holes 43 per row can be reduced by two accordingly. Such quantitative adjustment does not depart from the protection scope of the present invention. In addition, an inner side of the right side rear vertical plate 41 may be set in a straight shape, may be set in a zigzag shape, or may be set in other shapes by those skilled in the art according to actual needs.
FIG. 9a is a structural view of a support (in a contraction state) of the sample preparation mould according to an example of the present invention; FIG. 9b is a structural view of the support (in an extension state) of the sample preparation mould according to an example of the present invention. As shown in FIGS. 9a and 9b, the support 6 includes an upper end cap 61, a lower end cap 62 and a telescopic rod 63 located between the upper end cap 61 and the lower end cap 62; the telescopic rod 63 includes a first rod 631, a second rod 632 nested in the first rod 631, a third rod 633 nested in the second rod 632 and a fourth rod 634 nested in the third rod 633. The first rod 631 and the second rod 632 are connected by a first threaded fastener 64, and a length of the second rod 632 extending from the first rod 631 is adjusted by rotating the first threaded fastener 64. The second rod 632 and the third rod 633 are connected by a second threaded fastener 65, and a length of the third rod 633 extending from the second rod 632 is adjusted by rotating the second threaded fastener 65. The third rod 633 and the fourth rod 634 are connected by a third threaded fastener 66, and a length of the fourth rod 634 extending from the third rod 633 is adjusted by rotating the third threaded fastener 66. In other words, the support 6 has four telescopic sections, and a height of the bottom plate 5 can be adjusted by adjusting a height of the support 6. Specifically, as shown in FIGS. 4a, 4b, 6a and 6b, a first groove 50 is provided on the lower side of the bottom plate , and a second groove 30 is provided on an upper side of the left side bottom plate 32. The upper end cap 61 of the support 6 is embedded in the first groove 50, and the lower end cap 62 of the support 6 is embedded in the second groove 30. In this way, the support is fixed between the bottom plate 5 and the left side bottom plate 32.
Those skilled in the art should understand that relative positions of the elongated groove 11 of the front vertical plate 1 and the first pin 33, relative positions of the first U-shaped fork 51 on the lower side of the bottom plate 5 and the second pin 34, relative positions of the second U-shaped fork 52 and the third pin 35, relative positions of the third U-shaped fork 21 on the outer side of the rear vertical plate 2 and the fourth pin 53 and relative positions of the fourth U-shaped fork 22 and the fifth pin 54 are all adjustable. Further, the support 6 is telescopic. In this way, the sample preparation mould is able to prepare rock mass samples with discontinuities of different sizes and shapes for the shear test.
For example, to prepare a sawtooth rock mass sample after the sample preparation mould is assembled, the space size of the mould body is adjusted according to the size of the sample to be prepared. Meanwhile, the height of the support is adjusted. Two zigzag right side rear vertical plates 41 are used to form two sample preparation moulds. Slurry is poured into the two sample preparation moulds, then cured and finally formed into rock mass samples. The rock mass samples in the two sample preparation moulds are taken out, rotated clockwise and counterclockwise respectively along a length thereof, and merged by sawtooth surfaces thereof. The rock mass sample with the sawtooth surfaces merged is placed in a shear tester for a shear test.
The technical solutions of the present invention are described with reference to the preferred implementations and accompanying drawings. Those skilled in the art should easily understand that the protection scope of the present invention is apparently not limited to these specific implementations. Those skilled in the art can make equivalent changes or substitutions to related technical features without departing from the principle of the present invention, and the technical solutions after these changes or substitutions should fall within the protection scope of the present invention.
Claims (6)
1. A sample preparation mould for a shear test of rock mass discontinuities, wherein the sample preparation mould comprises a mould body with a semi-open space surrounded by a front vertical plate, a rear vertical plate, a left side plate, a right side plate and a bottom plate;
the left side plate and the right side plate are both L-shaped; the left side plate comprises a left side vertical plate and a left side bottom plate; the right side plate comprises a right side rear vertical plate and a right side vertical plate;
the sample preparation mould further comprises a support; the support is provided under the bottom plate to prop up the bottom plate;
wherein a first pin is provided at a connection between the left side vertical plate and the left side bottom plate of the L-shaped left side plate along a width direction of the left side vertical plate; an elongated groove with a leftward opening matching the first pin is provided at a lower part of the front vertical plate along a length direction of the front vertical plate;
the elongated groove allows the first pin to pass through and fix the left side plate and the front vertical plate by a bolt;
wherein an inner side of the left vertical plate is horizontally provided with a second pin and a third pin; a left end of a lower side of the bottom plate is horizontally provided with a first U-shaped fork and a second U-shaped fork with a downward opening matching the second pin and the third pin respectively;
an inner side of the first U-shaped fork and an inner side of the second U-shaped fork allow the second pin and the third pin to respectively pass through and fix the left side plate and the bottom plate by bolts;
wherein a rear area on an upper side of the bottom plate is horizontally provided with a fourth pin and a fifth pin; an outer side of the rear vertical plate is horizontally provided with a third U-shaped fork and a fourth U-shaped fork with a rear opening matching the fourth pin and the fifth pin respectively;
an inner side of the third U-shaped fork and an inner side of the fourth U-shaped fork allow the fourth pin and the fifth pin to respectively pass through and fix the bottom plate and the rear vertical plate by bolts; and wherein relative positions of the elongated groove of the front vertical plate and the first pin, relative positions of the first U-shaped fork on the lower side of the bottom plate and the second pin, relative positions of the second U-shaped fork and the third pin, relative positions of the third U-shaped fork on the outer side of the rear vertical plate and the fourth pin and relative positions of the fourth U-shaped fork and the fifth pin are all adjustable, so that the sample preparation mould is able to prepare rock mass samples with discontinuities of different sizes and shapes for the shear test.
2. The sample preparation mould for a shear test of rock mass discontinuities according to claim 1, wherein at least one row of through bolt holes are horizontally provided on an inner side of the rear vertical plate; at least one row of semi-through bolt holes matching the through bolt holes are horizontally provided on an outer side of the right side rear vertical plate;
after the outer side of the right side rear vertical plate abuts against the inner side of the rear vertical plate, bolts are allowed to pass through the through bolt holes and penetrate into the semi-through bolt holes to fix the rear vertical plate and the right side plate.
3. The sample preparation mould for a shear test of rock mass discontinuities according to claim 2, wherein the through bolt holes and the semi-through bolt holes each are in two rows; a number of the semi-through bolt holes in each row is less than or equal to a number of the through bolt holes in each row; and/or
after the rear vertical plate is fixed to the right side plate, a left end of the right side rear vertical plate abuts against an inner side of the left side vertical plate, and a front end of the right side vertical plate is in contact with the front vertical plate.
4. The sample preparation mould for a shear test of rock mass discontinuities according to claim 3, wherein an inner side of the right side rear vertical plate is straight or zigzag.
5. The sample preparation mould for a shear test of rock mass discontinuities according to any one of claims I to 4, wherein the support comprises an upper end cap, a lower end cap and a telescopic rod located between the upper end cap and the lower end cap;
the telescopic rod comprises a first rod, a second rod nested in the first rod, a third rod nested in the second rod and a fourth rod nested in the third rod; the first rod and the second rod are connected by a first threaded fastener, and a length of the second rod extending from the first rod is adjusted by rotating the first threaded fastener; the second rod and the third rod are connected by a second threaded fastener, and a length of the third rod extending from the second rod is adjusted by rotating the second threaded fastener; the third rod and the fourth rod are connected by a third threaded fastener, and a length of the fourth rod extending from the third rod is adjusted by rotating the third threaded fastener.
6. The sample preparation mould for a shear test of rock mass discontinuities according to claim 5, wherein a first groove is provided on the lower side of the bottom plate, and a second groove is provided on an upper side of the left side bottom plate; the upper end cap of the support is embedded in the first groove, and the lower end cap of the support is embedded in the second groove; in this way, the support is fixed between the bottom plate and the left side bottom plate.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811466735.8A CN109342166B (en) | 2018-12-03 | 2018-12-03 | Sample preparation die for shear test of rock mass structural surface |
| CN201811466735.8 | 2018-12-03 | ||
| PCT/CN2019/113866 WO2020114149A1 (en) | 2018-12-03 | 2019-10-29 | Sample making die for rock body structural surface shear test |
Publications (2)
| Publication Number | Publication Date |
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| AU (1) | AU2019392985B2 (en) |
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| CN109342166B (en) * | 2018-12-03 | 2023-09-05 | 中国科学院地质与地球物理研究所 | Sample preparation die for shear test of rock mass structural surface |
| CN110887747A (en) * | 2019-11-18 | 2020-03-17 | 宁波大学 | Sample manufacturing method for surface mine slope structural surface shear test based on three-dimensional reconstruction and three-dimensional carving technology |
| CN112129921A (en) * | 2020-09-21 | 2020-12-25 | 河南科技大学 | Sample preparation mold and test system for soil vibration parameter test |
| CN112362442A (en) * | 2020-11-09 | 2021-02-12 | 武汉科技大学 | Rock-like sample manufacturing mold and using method thereof |
| CN112549255B (en) * | 2020-11-25 | 2024-04-19 | 武汉科技大学 | Sample forming die for detecting refractory gunning material performance |
| CN113293808A (en) * | 2021-05-24 | 2021-08-24 | 中国电建市政建设集团有限公司 | Test device and method capable of simulating foundation pit retaining wall displacement to induce wall rear soil body deformation |
| CN113686699B (en) * | 2021-09-16 | 2022-06-10 | 中国矿业大学 | Device and method for shearing test of rock mass with different properties of rough crack surface layer |
| CN114112600B (en) * | 2021-12-13 | 2024-02-06 | 贵州大学 | Rock mass sample pouring die for manufacturing tunnel and joint model |
| CN114441335B (en) * | 2022-01-06 | 2024-06-07 | 泰山石膏(嘉兴)有限公司 | Method and device for measuring flexural strength of calcined gypsum |
| CN114878279B (en) * | 2022-06-01 | 2023-05-30 | 成都理工大学 | Rock sample manufacturing device and manufacturing method thereof |
| CN115420623B (en) * | 2022-07-29 | 2024-05-14 | 中国科学院武汉岩土力学研究所 | Rock direct shear apparatus based on size self-adaptive clamping shear box |
| CN116698544B (en) * | 2023-06-27 | 2024-02-06 | 北京科技大学 | Pouring mold and pouring method for layer-arrangement alternating test piece with variable angle and distance |
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| CN106370498A (en) * | 2016-12-05 | 2017-02-01 | 山东科技大学 | Adjustable model for preparation of rock specimen containing cracks and use method thereof |
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| Publication number | Publication date |
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| CN109342166B (en) | 2023-09-05 |
| AU2019392985A1 (en) | 2020-10-01 |
| WO2020114149A1 (en) | 2020-06-11 |
| CN109342166A (en) | 2019-02-15 |
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Free format text: THE NATURE OF THE AMENDMENT IS: AMEND THE INVENTION TITLE TO READ SAMPLE PREPARATION MOULD FOR SHEAR TEST OF ROCK MASS DISCONTINUITIES |
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