CN111855430B - Combined frame type anchored fracture rock mass compression-shear test device and application method thereof - Google Patents
Combined frame type anchored fracture rock mass compression-shear test device and application method thereof Download PDFInfo
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- CN111855430B CN111855430B CN202010922966.6A CN202010922966A CN111855430B CN 111855430 B CN111855430 B CN 111855430B CN 202010922966 A CN202010922966 A CN 202010922966A CN 111855430 B CN111855430 B CN 111855430B
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- 239000011435 rock Substances 0.000 title claims abstract description 122
- 238000012360 testing method Methods 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000010008 shearing Methods 0.000 claims abstract description 51
- 238000013461 design Methods 0.000 claims abstract description 8
- 239000010720 hydraulic oil Substances 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 239000003921 oil Substances 0.000 claims description 12
- 238000004873 anchoring Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 238000011160 research Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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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
- G01N3/04—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
- G01N3/24—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
- 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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- 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
- G01N2203/0026—Combination of several types of applied forces
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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
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- 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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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a combined frame-type pressure-shear test device for an anchored fractured rock mass and an application method thereof. The invention can realize the large-size multi-scale tensile and shearing test of the anchored fracture rock mass through the combined structure, and has important significance on theoretical research and engineering design of the anchored fracture rock mass.
Description
Technical Field
The invention relates to the problems, and provides a combined frame type anchored fracture rock mass compression-shear test device capable of carrying out large-size and multi-scale anchored fracture rock mass compression-shear tests and an application method thereof.
Background
The joints widely existing in the rock mass can have significant influence on the strength and deformation characteristics of the rock mass, and are root causes of many engineering geological disasters. As a supporting structure capable of penetrating into the inside of a rock mass, an anchor rod (cable) has become an important reinforcement means for jointed rock mass. In order to solve the difficult problem of shearing damage of an anchor rod on an engineering site and reduce a plurality of engineering disasters caused by instability of fractured rock mass, the shearing characteristics of the anchored jointed rock mass are urgently needed to be studied in depth.
The traditional shear test device is mainly used for carrying out direct shear test on a rock mass test piece with an anchored fracture, the test piece is placed in a fixed shear box, the test piece can be contained in a small size, the size of the test piece is only consistent with that of the shear box, the problem that large-size and multi-scale shear test cannot be carried out, and the influence of complex boundary conditions such as surrounding rock stress cannot be considered.
Disclosure of Invention
The invention improves the problems, namely the technical problem to be solved by the invention is that the traditional shearing test device mainly carries out direct shearing test on the anchored fracture rock mass test piece and cannot carry out large-size and multi-scale shearing test.
The specific embodiments of the invention are: the combined frame type pressure-shear test device for the anchored fracture rock mass comprises an anchored fracture rock mass test piece, an axial pressure applying system for applying pressure to the positive side of the anchored fracture rock mass test piece, a shearing force applying system for applying pressure to the lateral side of the anchored fracture rock mass test piece, and a combined frame for limiting the anchored fracture rock mass test piece, supporting the axial pressure applying system and the shearing force applying system.
Further, the shearing force application system comprises a shearing hydraulic oil cylinder fixed on the combined frame, a shearing force servo oil source for providing hydraulic oil for the shearing hydraulic oil cylinder, and a loading cushion block fixed at the end part of the shearing hydraulic oil cylinder; the axial pressure applying system comprises an axial hydraulic cylinder fixed on the combined frame, an axial pressure servo oil source for providing hydraulic oil for the hydraulic cylinder, and a loading cushion block fixed at the telescopic end of the axial hydraulic cylinder.
Further, the combined frame comprises a bottom layer combined frame, a fixed frame wrapping the periphery of the rear part of the anchored fracture rock mass test piece, a shearing loading reaction frame vertically used for fixing the shearing hydraulic cylinder and an axial pressure loading reaction frame vertically used for fixing the axial hydraulic cylinder.
Further, the bottom layer combined frame is a horizontal square frame unit combined surface positioned at the bottom of the anchored fractured rock mass test block;
The fixed frame comprises vertical square frame unit combination surfaces positioned at the rear parts and the rear sides of two sides of the anchored fracture rock mass test block and horizontal square frame unit combination surfaces positioned at the top of the anchored fracture rock mass test block, the adjacent vertical square frame unit combination surfaces are connected through bolts, the horizontal square frame unit combination surfaces are connected with the vertical square frame unit combination surfaces through bolts, and the bottom layer combination frame is fixed at the lower side of the vertical square frame unit combination surfaces;
The shear loading reaction frame and the axial pressure loading reaction frame are vertical square frame unit combination surfaces vertically fixed on the bottom layer combination frame.
Further, the top and bottom combined frames of the anchored fracture rock mass test block fixing frame and the contact surface of the anchored fracture rock mass are fixed with ball antifriction plates.
Further, the fixed frame is wrapped with a confining pressure frame, the confining pressure frame comprises a vertical confining pressure loading counterforce frame positioned at the top of the front side of the anchored fracture rock mass test block and horizontal confining pressure loading counterforce frames positioned at the front part and the left and right parts of the front side of the anchored fracture rock mass test block, and the vertical confining pressure loading counterforce frame is fixedly connected with a horizontal square frame unit combination surface of the fixed frame through a connecting bolt; the horizontal confining pressure loading counter-force frames are adjacent to each other and connected through bolts to form a U-shaped frame, the lower surface of the vertical confining pressure loading counter-force frame is fixedly provided with ball antifriction plates, hydraulic pads are fixed between two sides of the anchor fracture rock mass test piece and the confining pressure frames and between the tops and bottoms of the anchor fracture rock mass test piece and the ball antifriction plates, and the hydraulic pads are used for providing oil pressure for the hydraulic pads through a hydraulic oil source.
Further, the surface of the ball antifriction plate facing the anchored fracture rock mass is provided with rotatable balls so as to reduce friction force between the anchored fracture rock mass test piece and the bottom layer combined frame as well as between the anchored fracture rock mass test piece and the fixed frame.
Further, the vertical square frame unit combination surface, the horizontal square frame unit combination surface, the vertical confining pressure loading counter-force frame and the horizontal confining pressure loading counter-force frame are formed by combining and fixing steel square frame units, the steel square frame units are cubic box bodies with openings at one sides, bolt holes are reserved in the five surfaces of the steel square frame units, and the equivalent vertical surfaces of the steel square frame units adjacent to each other from left to right are fixed through bolts; the single bottom surfaces of the front and back adjacent steel square frames are fixedly connected through penetrating bolts.
Further, the gap rock mass test piece comprises an anchor rod and two side-by-side concrete/rock masses; the number of the anchor rods is not less than one; two side-by-side concrete/rock blocks are provided with through holes for installing anchor rods; the anchor rod is fixed in the drilling hole of the concrete/rock block through mortar or resin anchoring agent; the two sides of the anchor rod in the anchored fracture rock mass test piece do not extend out of the concrete/rock mass.
The invention also discloses an application method of the combined frame type anchored fracture rock mass compression-shear test device, which comprises the following steps of:
(1) Assembling a combined frame according to the size of the anchored fracture rock mass test piece so as to match the sizes of the two; then installing a shearing force application system, an axial pressure application system and an anchored fractured rock mass test piece;
(2) Applying horizontal pressure to the two ends of the anchored fractured rock mass test piece to a design value through an axial pressure applying system;
(3) The hydraulic oil cylinder is controlled to apply pressure to the anchored fractured rock mass test piece through a shearing force servo oil source of the shearing force application system, the loading is stopped after the shearing displacement reaches a design value, and the shearing force and the shearing deformation condition of the anchored fractured rock mass test piece in the loading process are recorded in the process;
(4) And then, the hydraulic oil cylinder of the shearing force application system is retracted, the pressure of the axial pressure application system is released, the combined frame-type anchored fracture rock mass pressure-shear test device is disassembled, a test piece is taken out, and the test is ended.
Compared with the prior art, the invention has the following beneficial effects: the invention can realize the large-size and multi-scale tensile and shearing test of the anchored fracture rock mass through the combined structure, and has important significance on theoretical research and engineering design of the anchored fracture rock mass.
Drawings
FIG. 1 is a three-dimensional schematic diagram of a combined frame-type anchored fractured rock mass compression-shear test apparatus of the present invention;
FIG. 2 is a schematic top view of a combined frame-type anchored fractured rock mass compression-shear test apparatus of the present invention;
FIG. 3 is a three-dimensional schematic view of an anchored fractured rock mass specimen according to the present invention;
FIG. 4 is a schematic diagram of a four steel block unit assembly;
FIG. 5 is a schematic view of a single bottom surface assembly of a steel block unit of the composite frame system of the present invention;
FIG. 6 is a three-dimensional schematic diagram of an embodiment of the present invention incorporating a containment pressure loading system;
FIG. 7 is a three-dimensional schematic diagram of a horizontal confining pressure loading reaction frame of a movable side of a secondary anchored fracture rock mass test piece according to an embodiment of the invention;
FIG. 8 is a schematic cross-sectional view of a movable side concrete block and surrounding structure of an anchored split rock mass specimen.
In the figure: 1. a combination frame; 11. a bottom layer combined frame; 12. a fixed frame; 13. a shear loading reaction frame; 14. an axial pressure loading counterforce frame; 111. the outer peripheral surface of the steel square frame unit; 112. the bottom surface of the steel square frame unit; 113. bolt holes; 114. a short bolt; 115. a long bolt; 21. shearing a hydraulic cylinder; 22. loading a cushion block; 23. antifriction backing plate; 41. a bolt; 42. concrete/rock; 51. and a hydraulic cushion.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
As shown in fig. 1 to 8, the combined frame-type pressure-shear test device for the anchored fracture rock mass comprises an anchored fracture rock mass test piece, an axial pressure application system for applying pressure to the positive side of the anchored fracture rock mass test piece, a shearing force application system for applying pressure to the lateral side of the anchored fracture rock mass test piece, and a combined frame for limiting the anchored fracture rock mass test piece, supporting the axial pressure application system and the shearing force application system.
In this embodiment, the shear force application system includes a shear hydraulic cylinder fixed on the combined frame, a shear force servo oil source for providing hydraulic oil for the shear hydraulic cylinder, and a loading pad fixed at the end of the shear hydraulic cylinder; the axial pressure applying system comprises an axial hydraulic cylinder fixed on the combined frame, an axial pressure servo oil source for providing hydraulic oil for the hydraulic cylinder, and a loading cushion block fixed at the telescopic end of the axial hydraulic cylinder.
In the embodiment, the combined frame comprises a bottom layer combined frame, a fixed frame wrapping the periphery of the rear part of the anchored fractured rock mass test, a shearing loading reaction frame vertically used for fixing the shearing hydraulic cylinder and an axial pressure loading reaction frame vertically used for fixing the axial hydraulic cylinder.
In the embodiment, the bottom layer combined frame is a horizontal square frame unit combined surface positioned at the bottom of the anchored fractured rock mass test block;
The fixed frame comprises vertical square frame unit combination surfaces positioned at the rear parts and the rear sides of two sides of the anchored fracture rock mass test block and horizontal square frame unit combination surfaces positioned at the top of the anchored fracture rock mass test block, the adjacent vertical square frame unit combination surfaces are connected through bolts, the horizontal square frame unit combination surfaces are connected with the vertical square frame unit combination surfaces through bolts, and the bottom layer combination frame is fixed at the lower side of the vertical square frame unit combination surfaces;
The shear loading reaction frame and the axial pressure loading reaction frame are vertical square frame unit combination surfaces vertically fixed on the bottom layer combination frame.
In the embodiment, a ball antifriction plate is fixed on the contact surface of the bottom layer combined frame and the anchored fractured rock mass of the top layer combined frame of the anchored fractured rock mass test block fixed frame.
In a second embodiment, the fixing frame is wrapped with a confining pressure frame, the confining pressure frame comprises a vertical confining pressure loading counterforce frame positioned at the top of the front side of the anchored fracture rock mass test block and horizontal confining pressure loading counterforce frames positioned at the front part and the left and right parts of the front side of the anchored fracture rock mass test block, and the vertical confining pressure loading counterforce frame is fixedly connected with a horizontal square frame unit combination surface of the fixing frame through a connecting bolt; the horizontal confining pressure loading counter-force frames are adjacent to each other and connected through bolts to form a U-shaped frame, the lower surface of the vertical confining pressure loading counter-force frame is fixedly provided with ball antifriction plates, hydraulic pads are fixed between two sides of the anchor fracture rock mass test piece and the confining pressure frames and between the tops and bottoms of the anchor fracture rock mass test piece and the ball antifriction plates, and the hydraulic pads are used for providing oil pressure for the hydraulic pads through a hydraulic oil source.
In this embodiment, the surface of the ball antifriction plate facing the rock mass with the anchor crack has rotatable balls to reduce friction between the rock mass test piece with the anchor crack and the bottom layer combined frame and the fixed frame of the rock mass test piece with the anchor crack.
In the above embodiment, the vertical square frame unit combination surface, the horizontal square frame unit combination surface, the vertical confining pressure loading reaction frame and the horizontal confining pressure loading reaction frame are formed by combining and fixing steel square frame units, the steel square frame units are cubic box bodies with openings at one sides, each of the five surfaces of the steel square frame units comprises 5 outer peripheral surfaces and a bottom surface, bolt holes are reserved in the five surfaces of the steel square frame units, and the equivalent vertical surfaces of the steel square frame units adjacent to each other from left to right are fixed through short bolts; the single bottom surfaces of the front and back adjacent steel square frames are fixedly connected through long bolts.
In the above embodiment, the interstitial rock mass test piece comprises an anchor rod and two side-by-side concrete/rock masses; the number of the anchor rods is not less than one; two side-by-side concrete/rock blocks are provided with through holes for installing anchor rods; the anchor rod is fixed in the drilling hole of the concrete/rock block through mortar or resin anchoring agent; the two sides of the anchor rod in the anchored fracture rock mass test piece do not extend out of the concrete/rock mass.
The invention also comprises an application method of the combined frame-type anchored fracture rock mass compression-shear test device, which is characterized by comprising the following steps according to the following claims:
(1) Assembling a combined frame according to the size of the anchored fracture rock mass test piece so as to match the sizes of the two; then installing a shearing force application system, an axial pressure application system and an anchored fractured rock mass test piece;
(2) Applying horizontal pressure to the two ends of the anchored fractured rock mass test piece to a design value through an axial pressure applying system;
(3) The hydraulic oil cylinder is controlled to apply pressure to the anchored fractured rock mass test piece through a shearing force servo oil source of the shearing force application system, the loading is stopped after the shearing displacement reaches a design value, and the shearing force and the shearing deformation condition of the anchored fractured rock mass test piece in the loading process are recorded in the process;
(4) And then, the hydraulic oil cylinder of the shearing force application system is retracted, the pressure of the axial pressure application system is released, the combined frame-type anchored fracture rock mass pressure-shear test device is disassembled, a test piece is taken out, and the test is ended.
Any of the above-described embodiments of the present invention disclosed herein, unless otherwise stated, if they disclose a numerical range, then the disclosed numerical range is the preferred numerical range, as will be appreciated by those of skill in the art: the preferred numerical ranges are merely those of the many possible numerical values where technical effects are more pronounced or representative. Since the numerical values are more and cannot be exhausted, only a part of the numerical values are disclosed to illustrate the technical scheme of the invention, and the numerical values listed above should not limit the protection scope of the invention.
If the terms "first," "second," etc. are used herein to define a part, those skilled in the art will recognize that: the use of "first" and "second" is used merely to facilitate distinguishing between components and not otherwise stated, and does not have a special meaning.
Meanwhile, if the above invention discloses or relates to parts or structural members fixedly connected with each other, the fixed connection may be understood as follows unless otherwise stated: detachably fixed connection (e.g. using bolts or screws) can also be understood as: the non-detachable fixed connection (e.g. riveting, welding), of course, the mutual fixed connection may also be replaced by an integral structure (e.g. integrally formed using a casting process) (except for obviously being unable to use an integral forming process).
In addition, terms used in any of the above-described aspects of the present disclosure to express positional relationship or shape have meanings including a state or shape similar to, similar to or approaching thereto unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components, or can be manufactured by an integral forming process.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present invention and are not limiting; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (5)
1. The combined frame type pressure-shear test device for the anchored fracture rock mass is characterized by comprising an anchored fracture rock mass test piece, an axial pressure application system for applying pressure to the positive side of the anchored fracture rock mass test piece, a shearing force application system for applying pressure to the lateral side of the anchored fracture rock mass test piece, and a combined frame for limiting the anchored fracture rock mass test piece and supporting the axial pressure application system and the shearing force application system;
The shearing force application system comprises a shearing hydraulic oil cylinder fixed on the combined frame, a shearing force servo oil source for providing hydraulic oil for the shearing hydraulic oil cylinder, and a loading cushion block fixed at the end part of the shearing hydraulic oil cylinder; the axial pressure applying system comprises an axial hydraulic cylinder fixed on the combined frame, an axial pressure servo oil source for providing hydraulic oil for the hydraulic cylinder, and a loading cushion block fixed at the telescopic end of the axial hydraulic cylinder;
The combined frame comprises a bottom layer combined frame, a fixed frame wrapping the periphery of the rear part of the anchored fracture rock mass test piece, a shearing loading reaction frame vertically used for fixing the shearing hydraulic cylinder and an axial pressure loading reaction frame vertically used for fixing the axial hydraulic cylinder;
the bottom layer combined frame is a horizontal square frame unit combined surface positioned at the bottom of the anchored fractured rock mass test block;
The fixed frame comprises vertical square frame unit combination surfaces positioned at the rear parts and the rear sides of two sides of the anchored fracture rock mass test block and horizontal square frame unit combination surfaces positioned at the top of the anchored fracture rock mass test block, the adjacent vertical square frame unit combination surfaces are connected through bolts, the horizontal square frame unit combination surfaces are connected with the vertical square frame unit combination surfaces through bolts, and the bottom layer combination frame is fixed at the lower side of the vertical square frame unit combination surfaces;
The shear loading reaction frame and the axial pressure loading reaction frame are vertical square frame unit combination surfaces vertically fixed on the bottom layer combination frame;
The top and bottom combined frame of the anchored fracture rock mass test block fixing frame and the contact surface of the anchored fracture rock mass are fixed with a ball antifriction plate;
The fixing frame is wrapped with a confining pressure frame, the confining pressure frame comprises a vertical confining pressure loading counterforce frame positioned at the top of the front side of the anchored fracture rock mass test block and horizontal confining pressure loading counterforce frames positioned at the front part and the left and right parts of the front side of the anchored fracture rock mass test block, and the vertical confining pressure loading counterforce frame is fixedly connected with a horizontal square frame unit combination surface of the fixing frame through a connecting bolt; the horizontal confining pressure loading counter-force frames are adjacent to each other and connected through bolts to form a U-shaped frame, the lower surface of the vertical confining pressure loading counter-force frame is fixedly provided with ball antifriction plates, hydraulic pads are fixed between two sides of the anchor fracture rock mass test piece and the confining pressure frames and between the tops and bottoms of the anchor fracture rock mass test piece and the ball antifriction plates, and the hydraulic pads are used for providing oil pressure for the hydraulic pads through a hydraulic oil source.
2. The combined frame type anchoring fracture rock mass compression-shear test device according to claim 1, wherein the ball antifriction plate is provided with rotatable balls towards the surface of the anchoring fracture rock mass so as to reduce friction force between the anchoring fracture rock mass test piece and the bottom layer combined frame and between the anchoring fracture rock mass test piece and the anchoring fracture rock mass fixing frame.
3. The combined frame-type anchored fracture rock mass compression-shear test device according to claim 1, wherein the vertical frame unit combination surface, the horizontal frame unit combination surface, the vertical confining pressure loading counter-force frame and the horizontal confining pressure loading counter-force frame are formed by combining and fixing steel frame units, the steel frame units are cubic boxes with openings at one side, bolt holes are reserved in five surfaces of the steel frame units, and equivalent vertical surfaces of the steel frame units adjacent to each other at left and right are fixed through bolts; the single bottom surfaces of the front and back adjacent steel square frames are fixedly connected through penetrating bolts.
4. The composite frame-type anchored fractured rock mass compression-shear test device according to claim 1, wherein the anchored fractured rock mass test piece comprises an anchor rod and two side-by-side concrete/rock masses; the number of the anchor rods is not less than one; two side-by-side concrete/rock blocks are provided with through holes for installing anchor rods; the anchor rod is fixed in the drilling hole of the concrete/rock block through mortar or resin anchoring agent; the two sides of the anchor rod in the anchored fracture rock mass test piece do not extend out of the concrete/rock mass.
5. An application method of a combined frame type anchored fracture rock mass compression-shear test device is characterized in that the combined frame type anchored fracture rock mass compression-shear test device according to claim 1 is utilized, and the application method comprises the following steps:
(1) Assembling a combined frame according to the size of the anchored fracture rock mass test piece so as to match the sizes of the two; then installing a shearing force application system, an axial pressure application system and an anchored fractured rock mass test piece;
(2) Applying horizontal pressure to the two ends of the anchored fractured rock mass test piece to a design value through an axial pressure applying system;
(3) The hydraulic oil cylinder is controlled to apply pressure to the anchored fractured rock mass test piece through a shearing force servo oil source of the shearing force application system, the loading is stopped after the shearing displacement reaches a design value, and the shearing force and the shearing deformation condition of the anchored fractured rock mass test piece in the loading process are recorded in the process;
(4) And then, the hydraulic oil cylinder of the shearing force application system is retracted, the pressure of the axial pressure application system is released, the combined frame-type anchored fracture rock mass pressure-shear test device is disassembled, a test piece is taken out, and the test is ended.
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| CN116086979B (en) * | 2023-03-07 | 2024-07-05 | 西南交通大学 | Sliding plate type fault multi-angle stick-slip simulation device and test method |
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| CN104749049B (en) * | 2015-04-21 | 2017-11-17 | 武汉理工大学 | A kind of rock mass discontinuity shearing test method and device |
| CN105223080B (en) * | 2015-09-25 | 2017-04-19 | 山东大学 | Evaluation method for jointed rock performance and bolting and grouting effects under compression-shear condition |
| CN107179245B (en) * | 2017-07-06 | 2023-08-11 | 中国科学院武汉岩土力学研究所 | Tensile compression ring shear seepage tester and tensile compression ring shear seepage test system |
| CN110243701B (en) * | 2019-07-05 | 2022-02-01 | 山东科技大学 | Torsion shear test device and method for anchored rock mass |
| CN110261234B (en) * | 2019-07-05 | 2022-03-29 | 山东科技大学 | Fractured rock mass separation layer anchoring control simulation test device and method |
| CN110567798A (en) * | 2019-09-09 | 2019-12-13 | 桂林理工大学 | Test piece for testing tensile-shear strength of surface fractured rock mass and tensile-shear strength testing method |
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