CN111982708A - Shearing box for simulating movement characteristics of movable fault - Google Patents
Shearing box for simulating movement characteristics of movable fault Download PDFInfo
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- CN111982708A CN111982708A CN202010835052.6A CN202010835052A CN111982708A CN 111982708 A CN111982708 A CN 111982708A CN 202010835052 A CN202010835052 A CN 202010835052A CN 111982708 A CN111982708 A CN 111982708A
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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
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01N3/04—Chucks
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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
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
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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
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Abstract
The invention discloses a shearing box for simulating the movement characteristics of a movable fault, which comprises an upper shearing box and a lower shearing box which are symmetrically arranged, wherein the upper shearing box and the lower shearing box are mutually matched and butted through a concave-convex structure. The upper shearing box is provided with a bulge, the lower shearing box is provided with a groove, a cavity between the bulge and the groove is used for placing a simulated fault filler test piece after assembly, a sawtooth-shaped plate is respectively connected to horizontal surfaces of the bulge and the groove through fixing bolts and used for simulating a fault wall surface, the fluctuation angle and the fluctuation height of sawteeth can be adjusted as required to change the roughness of a simulated fault, and an ultrasonic transducer is installed inside the lower shearing box and below the groove and used for measuring an Acoustic Emission (AE) signal in the shearing process of the movable fault. The device simple structure, the equipment is convenient, uses in a flexible way, and the leakproofness is good, and can be fine and current testing machine compatibility, has very strong suitability.
Description
Technical Field
The invention relates to the technical field of geomechanical experiments in rock mass engineering, in particular to a shear box for simulating the motion characteristic of a movable fault.
Background
The fault is a geological interface commonly existing in the earth crust and controls the inoculation and the occurrence of earthquakes, the deformation and the rupture of the earth surface, the distribution and the migration of underground fluid, the inoculation of earth surface geological disasters and the like. Especially, the moving characteristics such as deformation rate and the like of the whole new movable fault are very obvious, so that the moving fault poses an important threat to the safety of large-scale hydraulic engineering, railway engineering and nuclear power engineering structures. Therefore, the research on the motion characteristics of the active fault has important basic theoretical value for understanding the active fault inoculation earthquake process and the dynamic mechanism, and has important significance for site selection, construction design and stability evaluation of large-scale engineering.
Scholars at home and abroad study the shearing property of a soft filling structural plane (simulated fault) through a large number of indoor shearing tests, and a large rock structural plane dynamic shearing test system independently researched and developed by the geology and the geophysical institute of the Chinese academy can carry out dynamic shearing tests of simulated faults in different strain rate ranges. However, the shear box used by the predecessor in the test has the following drawbacks:
1. the traditional shear box enables filling particles simulating fault to be easily extruded out of a shear seam under the action of tangential load and normal load, so that not only is the result distorted, but also the shear box is easy to deviate from the shear direction in the sliding process.
2. The sawtooth structure that simulation fault plane roughness that current shearing box provided links to each other with shearing box is whole usually, can't dismantle the change, can not satisfy the test requirement of multiple roughness.
Therefore, in the whole test process, how to ensure that the simulated fault filling particles overflow as little as possible under the action of tangential and normal loads and carry out the shear test of the simulated fault test piece under the conditions of different roughness is a problem which is researched and solved by many students.
Disclosure of Invention
The invention aims to provide a shear box for simulating the movement characteristics of a movable fault, which solves the problems in the prior art, and has the advantages of more accurate measurement, more flexible installation and more real result.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a shear box for simulating the motion characteristics of a movable fault, which comprises an upper shear box and a lower shear box, wherein the upper shear box is connected with the lower shear box; the upper shearing box and the lower shearing box are matched and butted with each other through a concave-convex structure; the bottom of the upper shearing box is provided with a protrusion, the top of the lower shearing box is provided with a groove, the groove is in butt joint with the protrusion, a gap is reserved between the groove and the protrusion, the gap is used for placing a simulated fault filler test piece, a sawtooth plate is arranged on the bottom surface of the protrusion and on the top surface of the groove and used for simulating a fault wall surface, and an ultrasonic transducer is arranged inside the lower shearing box at the bottom of the groove.
Preferably, the length and the width of the protrusion are the same as those of the groove, and the cross section of the protrusion is rectangular.
Preferably, the upper shearing box comprises a horizontal top plate bearing normal load, a protrusion which is arranged on the bottom surface of the horizontal top plate and is integrally formed with the horizontal top plate, the bottom surface of the protrusion is parallel to the top surface of the horizontal top plate, one end surface of the protrusion in the length direction is flush with the side surface of the horizontal top plate, the other end surface of the protrusion is away from the side surface of the horizontal top plate, and one end of the protrusion, which is flush with the side surface of the horizontal top plate, is provided with a positioning angle.
Preferably, the upper shear box further comprises a baffle plate, the baffle plate is provided with two threaded holes, the two threaded holes are abutted against one end of the protrusion, which is flush with the side surface of the horizontal top plate, and the baffle plate is fixed at the positioning angle through two bolts.
Preferably, four threaded holes are formed in the bottom surface of the protrusion, the sawtooth-shaped plate connected with the bottom surface of the protrusion is also provided with four threaded holes, and the sawtooth-shaped plate is mounted on the bottom surface of the protrusion through four bolts.
Preferably, the lower shear box comprises a horizontal bottom plate for bearing normal load, and a groove which is arranged on the top surface of the horizontal bottom plate and is integrally formed with the horizontal bottom plate, wherein the groove bottom surface of the groove is parallel to the bottom surface of the horizontal bottom plate, one end of the groove in the length direction penetrates through the side surface of the horizontal bottom plate, and the other end of the groove is spaced from the side surface of the horizontal bottom plate. The groove is provided with a positioning angle at one end which is flush with the side surface of the horizontal bottom plate.
Preferably, the middle part of the lower shearing box is provided with a cylindrical cavity for mounting an ultrasonic transducer, and the cylindrical cavity is communicated with the bottom surface of the groove.
Preferably, the lower shear box further comprises a cover plate, a step-shaped circular hole is formed in the middle of the cover plate, and the axis of the circular hole is collinear with the axis of the cylindrical cavity.
Preferably, four threaded holes are formed in the bottom surface of the groove, four threaded holes are also formed in the cover plate, the sawtooth-shaped plate and the cover plate are mounted on the bottom surface of the groove through four bolts, and the sawtooth-shaped plate is stacked on the cover plate; the area of the sawtooth-shaped plate is the same as the area of the bottom surface of the protrusion, which does not include the positioning angle, and the area of the sawtooth-shaped plate is the same as the area of the bottom surface of the groove slot, which does not include the positioning angle.
Preferably, the ultrasonic transducer comprises a convex cylindrical metal cushion block, a piezoelectric ceramic piece, a disc-shaped metal cushion block and a spring which are sequentially connected from top to bottom, the bottom end of the spring is connected with the cavity bottom of the cylindrical cavity, and the ultrasonic transducer further comprises a lead wire connected with an ultrasonic tester.
Compared with the prior art, the invention has the following beneficial technical effects:
1. through setting up concave-convex structure, avoid the test piece granule as far as possible to be extruded the shear box in experimental, improve the accuracy of test result, the complete test piece of reservation as far as possible.
2. After the upper shearing box and the lower shearing box are assembled through the concave-convex structure, the relative movement of the upper shearing box and the lower shearing box along the fixed direction is ensured, and the situation that the shearing box deviates from the shearing direction in the sliding process due to misoperation can be prevented.
3. The serrated plate is arranged on the shearing box to simulate a mother rock structural surface, and the roughness of the required simulated fault wall surface is adjusted through the fluctuating angle and the fluctuating height of the serrations, so that multiple sets of tests can be carried out.
4. Ultrasonic transducers are arranged in the lower shearing box and on the lower portion of the groove, and can be used for measuring AE signals of test pieces of different types under different loads in real time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is an exploded view of a shear box used in the present invention to simulate the motion characteristics of an active fault;
FIG. 2(a) is a front view of a shear box used in the present invention to simulate the motion characteristics of an active fault, wherein the upper shear box is in the displacement zero position;
FIG. 2(b) is a front view of a shear box for simulating the motion characteristics of an active fault in accordance with the present invention, wherein the upper shear box is in a test preset position;
FIG. 3(a) is a top view of a shear box for simulating the motion characteristics of an active fault in accordance with the present invention, wherein the upper shear box is in a displacement zero position;
FIG. 3(b) is a top view of a shear box for simulating the motion characteristics of a moving fault according to the present invention, wherein the upper shear box is in a test preset position;
FIG. 4(a) is a cross-sectional view taken along line A-A in FIG. 3 (a);
FIG. 4(b) is a cross-sectional view taken along line A-A in FIG. 3 (b);
FIG. 5 is a left side view of a shear box for simulating the motion characteristics of an active fault in accordance with the present invention;
FIG. 6 is a bottom plan view of the upper shear box of the present invention;
FIG. 7 is a top plan view of the lower shear box of the present invention;
in the figure: 1 is the upper shear box, 2 is the lower shear box, 3 is the sawtooth plate, 4 is the baffle, 5 is fixing bolt, 6 is the apron, 7 is protruding cylindrical metal cushion, 8 is piezoceramics piece, 9 is disc metal cushion, 10 is the spring, 11 is simulation fault test piece, 12 is the arch, 13 is the recess, 14 is ultrasonic transducer, 15 is cylindrical cavity.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a shear box for simulating the motion characteristics of a movable fault so as to solve the problems in the prior art.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The shear box for simulating the motion characteristic of the active fault in the embodiment, as shown in fig. 1-7, comprises an upper shear box 1 and a lower shear box 2; the upper shearing box 1 and the lower shearing box 2 are matched and butted with each other through a concave-convex structure; the bottom of the upper shearing box 1 is provided with a bulge 12, the top of the lower shearing box 2 is provided with a groove 13, the length and width of the bulge 12 are the same as those of the groove 13, the cross section of the bulge and the groove 13 are rectangular, and the bulge and the groove are combined to form a cuboid space with three closed sides for placing a simulated fault test piece; a gap is reserved between the butt joint of the groove 13 and the protrusion 12 and used for placing a simulated fault filler test piece 11, a sawtooth plate 3 is arranged on the bottom surface of the protrusion 12 and the top surface of the groove 13 and used for simulating a fault wall surface, and the fluctuation angle and the fluctuation height of the sawtooth can be automatically adjusted according to requirements and used for setting different roughness; an ultrasonic transducer 14 is arranged in the lower shear box 2 at the bottom of the groove 13 and used for measuring an AE signal of a test piece; the middle part of the lower shearing box 2 is provided with a cylindrical cavity 15 for mounting an ultrasonic transducer 14, and the cylindrical cavity 15 is communicated with the bottom surface of the groove 13. The ultrasonic transducer 14 comprises a convex cylindrical metal cushion block 7, a piezoelectric ceramic piece 8, a disc-shaped metal cushion block 9 and a spring 10 which are sequentially connected from top to bottom, the bottom end of the spring is connected with the cavity bottom of a cylindrical cavity 15, and the ultrasonic transducer 14 further comprises a lead wire connected with an ultrasonic tester.
In the embodiment, the upper shear box 1 comprises a horizontal top plate for bearing normal load and a protrusion 12 which is arranged on the bottom surface of the horizontal top plate and is integrally formed with the horizontal top plate, the bottom surface of the protrusion 12 is parallel to the top surface of the horizontal top plate, one end surface of the protrusion 12 in the length direction is flush with the side surface of the horizontal top plate, a certain distance is reserved between the other end surface of the protrusion 12 and the side surface of the horizontal top plate, and one end of the protrusion 12, which is flush with the side surface of the horizontal top plate, is provided; go up shear box 1 still includes a baffle 4, and baffle 4 is equipped with two screw holes, and near the one end that flushes at protruding 12 and horizontal roof side surface, fix at the angle of location through two bolts 5, specifically, the vertical face at protruding 12 angle of location is equipped with two screw holes, fixes a baffle 4 at protruding 12 angle of location through two bolts 5, and the other end of baffle is near the vertical face at recess 13 angle of location for it is excessive to stop the test piece granule after cuting.
In this embodiment, four threaded holes are formed in the bottom surface of the protrusion 12, the serration plate 3 connected thereto is also provided with four threaded holes, and the serration plate 3 is mounted on the bottom surface of the protrusion 12 by four bolts 5.
In this embodiment, the lower shear box 2 includes a horizontal bottom plate for bearing normal load, and a groove 13 disposed on the top surface of the horizontal bottom plate and integrally formed with the horizontal bottom plate, wherein the bottom surface of the groove 13 is parallel to the bottom surface of the horizontal bottom plate, one end of the groove 13 along the length direction penetrates through the side surface of the horizontal bottom plate, and the other end is spaced from the side surface of the horizontal bottom plate. The recess 13 is provided with a positioning angle at the end flush with the side surface of the horizontal floor.
In this embodiment, the lower shear box 2 further comprises a cover plate 6, a step-shaped circular hole is formed in the middle of the cover plate 6, and the axis of the circular hole is collinear with the axis of the cylindrical cavity 15; four threaded holes are formed in the bottom surface of the groove 13, four threaded holes are also formed in the cover plate 6, the sawtooth-shaped plate 3 and the cover plate 6 are mounted on the bottom surface of the groove 13 through four bolts 5, and the sawtooth-shaped plate 3 is stacked on the cover plate 6; the area of the serration plate 3 is the same as the area of the bottom surface of the protrusion 12 excluding the orientation angle, and the area of the bottom surface of the groove 13 excluding the orientation angle.
The major circle diameter of the stepped circular hole is the same as the diameter of the piezoelectric ceramic piece 8 and is used for being matched with the convex cylindrical metal cushion block to position the piezoelectric ceramic piece 8, the threaded hole is arranged corresponding to the threaded hole in the horizontal bottom surface of the groove 13 and is used for being matched with the fixing bolt 5 to install the sawtooth plate 3 and the cover plate 6 on the horizontal bottom surface of the groove 13 together. Under the condition that a fault test piece is not placed, after the upper shearing box and the lower shearing box are integrated, the sawteeth of the two sawtooth-shaped plates 3 are meshed with each other, and two ends of the baffle 4 are tightly attached to the horizontal plane of the positioning angle of the protrusion 12 and the horizontal plane of the positioning angle of the groove 13 respectively. All parts of the shearing box except the piezoelectric ceramic piece 8 and the spring 10 are all made of the same low-carbon steel material.
The shear test for simulating the moving fault moving characteristic by using the shear box provided by the invention comprises the following specific steps:
firstly, coating a layer of vaseline on each contact surface of a shearing box to ensure that the sliding friction between an upper shearing box and a lower shearing box is small, and applying a normal load provided by a normal oil cylinder to the shearing surface of a simulated fault test piece 11 through an upper shearing box 1 and a sawtooth-shaped plate 3; then, a shear load provided by the tangential cylinder is applied to the upper shear box 1 and pushed out at a constant speed, thereby acting on the shear plane of the simulated fault test piece 11. The displacement length of the test piece in the shear box along the shearing direction is smaller than the thickness of the baffle 4, so that the particles are prevented from being extruded out of the shear box. The moving speed of the lower shearing box 2 is determined according to the test requirements, and the speed range can be 0.001-1000 mm/s; in the test process, test data are recorded by the force sensor and the displacement sensor, meanwhile, the ultrasonic transducer 14 measures AE signals of different types of test pieces under different load conditions, and the signals are transmitted to the ultrasonic tester through the lead; and finally, stopping the test when the lower shearing box 2 moves to a preset position, wherein the distance between the preset position and the displacement zero point is between 0 value and the thickness value of the baffle 4.
The principle and the implementation mode of the invention are explained by applying specific examples, and the description of the above examples is only used for helping understanding the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.
Claims (10)
1. A shear box for simulating the motion characteristics of an active fault, characterized by: comprises an upper shearing box (1) and a lower shearing box (2); the upper shearing box (1) and the lower shearing box (2) are matched and butted with each other through a concave-convex structure; the bottom of the upper shearing box (1) is provided with a protrusion (12), the top of the lower shearing box (2) is provided with a groove (13), a gap is reserved between the groove (13) and the protrusion (12) after butt joint, the gap is used for placing a simulated fault filler test piece (11), a sawtooth plate (3) is arranged on the bottom surface of the protrusion (12) and the top surface of the groove (13) and used for simulating a fault wall surface, and an ultrasonic transducer (14) is arranged inside the lower shearing box (2) at the bottom of the groove (13).
2. A shear box for simulating the motion characteristics of an active fault according to claim 1, characterized in that: the length and the width of the protrusion (12) are the same as those of the groove (13), and the cross section of the protrusion is rectangular.
3. A shear box for simulating the motion characteristics of an active fault according to claim 1, characterized in that: go up shear box (1) including one bear normal load horizontal roof, set up in horizontal roof bottom surface and with horizontal roof integrated into one piece protruding (12), protruding (12) bottom surface is parallel with the horizontal roof top surface, protruding (12) are along length direction's one end surface and horizontal roof side surface flush, another end surface and horizontal roof side surface leave the distance, protruding (12) set up a locating angle in the one end that flushes with the horizontal roof side surface.
4. A shear box for simulating the motion characteristics of an active fault according to claim 3, characterized in that: the upper shearing box (1) further comprises a baffle (4), the baffle (4) is provided with two threaded holes, the two threaded holes are abutted to one end, flush with the side surface of the horizontal top plate, of the bulge (12), and the baffle is fixed at the positioning angle through two bolts (5).
5. A shear box for simulating the motion characteristics of an active fault according to claim 1, characterized in that: the bottom surface of the protrusion (12) is provided with four threaded holes, the sawtooth-shaped plate (3) connected with the bottom surface of the protrusion is also provided with four threaded holes, and the sawtooth-shaped plate (3) is installed on the bottom surface of the protrusion (12) through four bolts (5).
6. A shear box for simulating the motion characteristics of an active fault according to claim 1, characterized in that: the lower shearing box (2) comprises a horizontal bottom plate bearing normal load, and a groove (13) which is arranged on the top surface of the horizontal bottom plate and is integrally formed with the horizontal bottom plate, wherein the bottom surface of the groove (13) is parallel to the bottom surface of the horizontal bottom plate, one end of the groove (13) in the length direction penetrates through the side surface of the horizontal bottom plate, the other end of the groove (13) is spaced from the side surface of the horizontal bottom plate, and one end of the groove (13) which is flush with the side surface of the horizontal bottom plate is provided with a positioning angle.
7. A shear box for simulating the motion characteristics of an active fault according to claim 6, characterized in that: the middle part of the lower shearing box (2) is provided with a cylindrical cavity (15) for installing an ultrasonic transducer (14), and the cylindrical cavity (15) is communicated with the bottom surface of the groove (13).
8. The shear box for simulating the motion characteristics of an active fault of claim 7, wherein: shear box (2) still include an apron (6) down, apron (6) middle part is equipped with the circular port of a notch cuttype, just the axis of circular port with cylindrical cavity (15) axis collineation.
9. The shear box for simulating the motion characteristics of an active fault of claim 8, wherein: the bottom surface of the groove (13) is provided with four threaded holes, the cover plate (6) is also provided with four threaded holes, the sawtooth-shaped plate (3) and the cover plate (6) are arranged on the bottom surface of the groove (13) through four bolts (5), and the sawtooth-shaped plate (3) is stacked on the cover plate (6); the area of the sawtooth-shaped plate (3) is the same as the area of the bottom surface of the protrusion (12) without the positioning angle, and the area of the sawtooth-shaped plate is the same as the area of the bottom surface of the groove (13) without the positioning angle.
10. A shear box for simulating the motion characteristics of an active fault according to claim 1, characterized in that: ultrasonic transducer (14) include protruding cylindrical metal pad (7), piezoceramics piece (8), disc metal pad (9) and spring (10) that connect gradually from the top to the bottom, the bottom of spring with the chamber end of cylindrical cavity (15) is connected, ultrasonic transducer (14) still are including the lead wire of connecting the ultrasonic tester.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010835052.6A CN111982708B (en) | 2020-08-19 | 2020-08-19 | Shearing box for simulating movement characteristics of movable fault |
| AU2020102283A AU2020102283A4 (en) | 2020-08-19 | 2020-09-16 | Shear box for simulating motion characteristics of active fault |
| AU2021203989A AU2021203989B2 (en) | 2020-08-19 | 2021-06-16 | Shear box for simulating motion characteristics of active fault |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010835052.6A CN111982708B (en) | 2020-08-19 | 2020-08-19 | Shearing box for simulating movement characteristics of movable fault |
Publications (2)
| Publication Number | Publication Date |
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| CN111982708A true CN111982708A (en) | 2020-11-24 |
| CN111982708B CN111982708B (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010835052.6A Active CN111982708B (en) | 2020-08-19 | 2020-08-19 | Shearing box for simulating movement characteristics of movable fault |
Country Status (2)
| Country | Link |
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| CN (1) | CN111982708B (en) |
| AU (2) | AU2020102283A4 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112362479A (en) * | 2021-01-14 | 2021-02-12 | 中国科学院地质与地球物理研究所 | Experimental system and method for simulating influence of fracture stick-slip dislocation on tunnel engineering |
| CN116223248A (en) * | 2022-12-09 | 2023-06-06 | 中材科技风电叶片股份有限公司 | Tool and method for testing interfacial shear of blade root embedded metal sleeve and composite material |
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| CN112924125B (en) * | 2021-03-31 | 2024-07-23 | 北京市科学技术研究院城市安全与环境科学研究所(北京市劳动保护科学研究所) | Three-dimensional model soil box, system and method for testing vibration isolation effect of vibration isolation barrier field |
| CN113155388B (en) * | 2021-04-26 | 2023-06-20 | 常州大学 | Device for simulating vibration deformation of interlayer cavity wall of salt rock gas storage reservoir under fault action |
| CN113533102B (en) * | 2021-06-30 | 2024-08-02 | 新疆石河子职业技术学院（石河子市技工学校） | Novel fruit vegetables maturity detector |
| CN114594004A (en) * | 2021-12-17 | 2022-06-07 | 昆明理工大学 | Shearing box of improved direct shear apparatus |
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- 2020-08-19 CN CN202010835052.6A patent/CN111982708B/en active Active
- 2020-09-16 AU AU2020102283A patent/AU2020102283A4/en not_active Ceased
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| CN110411822B (en) * | 2019-07-15 | 2020-02-14 | 中国科学院地质与地球物理研究所 | Shearing box for testing cyclic shearing characteristics of rock mass structural plane |
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| US11085859B1 (en) | 2021-01-14 | 2021-08-10 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Experimental system and method for simulating effect of fault stick-slip displacement on tunnel engineering |
| CN116223248A (en) * | 2022-12-09 | 2023-06-06 | 中材科技风电叶片股份有限公司 | Tool and method for testing interfacial shear of blade root embedded metal sleeve and composite material |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2020102283A4 (en) | 2020-10-29 |
| AU2021203989B2 (en) | 2022-07-14 |
| AU2021203989A1 (en) | 2022-03-10 |
| CN111982708B (en) | 2021-06-01 |
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