CN102830023A - Variable-angle plate testing method of cylinder rock sample - Google Patents
Variable-angle plate testing method of cylinder rock sample Download PDFInfo
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- CN102830023A CN102830023A CN2012103210731A CN201210321073A CN102830023A CN 102830023 A CN102830023 A CN 102830023A CN 2012103210731 A CN2012103210731 A CN 2012103210731A CN 201210321073 A CN201210321073 A CN 201210321073A CN 102830023 A CN102830023 A CN 102830023A
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Abstract
The invention discloses a variable-angle plate testing method of a cylinder rock sample. Aiming at the condition that most of samples are cylinder rock core samples, the size is small, particularly, the samples are those soft or medium-hard rocks, and large rock samples are extremely difficult to exploit to perform a variable-angle test in actual engineering, the rock sample test piece which is machined into a cylinder is clamped in a clamping ring and placed in a variable-angle plate clamp to perform shear test by means of a pair of semicircular clamping rings. The variable-angle plate testing method has the advantages that the application range of the variable-angle plate test of the cylinder rock sample is wider and more convenient, the semicircular steel clamping rings are convenient to manufacture and easy to use and manpower and material resources are saved; the experiment results of the cylinder rock sample test piece and a square rock sample test piece are close to each other; and the variable-angle plate test result of the cylinder rock sample test piece has a certain degree of reliability.
Description
Technical field
Technical field is civil construction project, angle plate experimental technique field under the present invention, particularly a kind of right cylinder rock sample angle plate test method.
Background technology
Angle plate test method(s) is to utilize pressing machine to apply vertical load; Make test specimen produce shear failure through the special anchor clamps of a cover along a certain shear surface; Resolve normal direction compressive stress and shear stress on the shear surface through static balance condition then; Thereby draw the relation curve of normal direction compressive stress
and shear stress
, cohesion c and these two parameters of angle of internal friction
of trying to achieve rock all have great importance with fragmentation to the research rock mass is stable.Usually; The square test specimen of 5cmx5cmx5cm or 7cmx7cmx7cm is adopted in this test, but in the actual engineering, major part all is to adopt cylindric bore specimen; Diameter is generally 5～7cm; Size is less, and particularly those softer or medium hardness rocks are difficult to adopt bigger rock sample and carry out the angle test.
Summary of the invention
The purpose of this invention is to provide a kind of right cylinder rock sample angle plate test method.By a pair of semicircle snap ring, rock sample is processed into short cylinder, it is stuck in the snap ring, put into the angle board clamp and carry out the disconnected test of shearing resistance.
Concrete steps are:
(1) the rock sample of fetching, press equidirectional, identical saturation state is processed into right cylinder rock sample test specimen respectively, and the irregularity degree error of right cylinder rock sample test specimen both ends of the surface is no more than 0.05mm, the end face vertical axis, and maximum deviation is no more than 0.25 °.
(2) making a profile is square, and internal diameter is the pair of semicircular shaped snap ring.
(3) the right cylinder rock sample test specimen that step (1) is processed is put into the inclination pressing mold after in the snap ring of step (2), blocking well again; They are placed on up and down between bearing plate of testing machine respectively, and testing machine applies xial feed, and its loading velocity is 0.5～1.0MPa/s; Apply vertical force and horizontal force by press mold to the rock sample test specimen along the fixed shear face; Cut off record failing load, off-load up to the rock sample test specimen.
(4) translation-angle carries out the experiment of another piece, 12～15 of every group of quantity, and 2～3 rock sample test specimens of each angle, the angular transformation scope obtains the axial collapse load of right cylinder rock sample test specimen under different angles respectively in 50 °～70 °.
Different with square rock sample test specimen experimental technique commonly used, the present invention adopts right cylinder rock sample test specimen, has the following advantages:
(1) in the actual engineering, right cylinder rock sample test specimen makes right cylinder rock sample angle plate test application face more extensively more convenient than better collection of square rock sample test specimen and processing.
(2) semicircle steel snap ring is convenient makes, and uses simply, uses manpower and material resources sparingly.
(3) right cylinder rock sample test specimen and square rock sample test specimen result of experiment are more approaching; And the related coefficient between compressive stress of right cylinder rock sample specimen test gained
and the shear stress
is greater than 0.96; The destruction foliation is thought; The body two halves that break are symmetrical basically, so right cylinder rock sample test specimen angle plate test findings has certain degree of reliability.
Description of drawings
Fig. 1 is embodiment of the invention test synoptic diagram.
Fig. 2 tests used steel snap ring floor map for the embodiment of the invention.
Fig. 3 is a square rock sample specimen test synoptic diagram.
Mark among the figure: 1-roller bearing; 2-angle plate; 3-rock sample test specimen; The 4-bearing plate; The 5-snap ring.
Embodiment
Embodiment:
(1) the limestone of fetching from the scene, grouan and siltstone rock sample; Press equidirectional; Identical saturation state; Be processed into the right cylinder rock sample test specimen of
5cm x 5cm respectively; Microfissure is contained on limestone rock sample test specimen surface, and the grouan medium weathering is to severely-weathered, and external crack is more; The irregularity degree error of right cylinder rock sample test specimen both ends of the surface is no more than 0.05mm, the end face vertical axis, and maximum deviation is no more than 0.25 °.
(2) making a profile is square, and internal diameter is a pair of semicircular shaped steel snap ring.
(3) put into the inclination pressing mold again after in snap ring, blocking the right cylinder rock sample test specimen that processes well; They are placed on up and down between bearing plate of testing machine respectively, and testing machine applies xial feed, and its loading velocity is 1.0MPa/s; Apply vertical force and horizontal force by press mold to test specimen along the fixed shear face; Cut off record failing load, off-load up to the rock sample test specimen.
(4) translation-angle carries out the experiment of another piece, 12 of every group of quantity, and 2 rock sample test specimens of each angle, the angular transformation scope obtains the axial collapse load of right cylinder rock sample test specimen under different angles of three kinds of rocks respectively in 60 °.
Claims (1)
1. right cylinder rock sample angle plate test method is characterized in that concrete steps are:
(1) the rock sample of fetching from the scene, press equidirectional, identical saturation state is processed into right cylinder rock sample test specimen respectively, the end face vertical axis, and maximum deviation is no more than 0.25 °;
(2) making a profile is square, and internal diameter is the pair of semicircular shaped snap ring;
(3) the right cylinder rock sample test specimen that step (1) is processed is put into the inclination pressing mold after in the snap ring of step (2), blocking well again; They are placed on up and down between bearing plate of testing machine respectively, and testing machine applies xial feed, and its loading velocity is 0.5～1.0MPa/s; Apply vertical force and horizontal force by press mold to the rock sample test specimen along the fixed shear face; Cut off record failing load, off-load up to the rock sample test specimen;
(4) translation-angle carries out the experiment of another piece, 12～15 of every group of quantity, and 2～3 rock sample test specimens of each angle, the angular transformation scope obtains the axial collapse load of right cylinder rock sample test specimen under different angles respectively in 50 °～70 °.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103210731A CN102830023A (en) | 2012-09-03 | 2012-09-03 | Variable-angle plate testing method of cylinder rock sample |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103210731A CN102830023A (en) | 2012-09-03 | 2012-09-03 | Variable-angle plate testing method of cylinder rock sample |
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| CN102830023A true CN102830023A (en) | 2012-12-19 |
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| CN2012103210731A Pending CN102830023A (en) | 2012-09-03 | 2012-09-03 | Variable-angle plate testing method of cylinder rock sample |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486583A (en) * | 2016-01-25 | 2016-04-13 | 重庆交通大学 | Soil body two-dimensional fracture testing method and device |
| CN105510154A (en) * | 2016-01-01 | 2016-04-20 | 三峡大学 | Device for measuring shearing strength index of rock-soil specimen and measuring method |
| CN105527172A (en) * | 2016-01-01 | 2016-04-27 | 三峡大学 | Apparatus and method for measuring geotechnical cylindrical sample shear strength index |
| CN105606462A (en) * | 2016-01-01 | 2016-05-25 | 三峡大学 | Device and method for measuring rock sample shear strength indexes at different schistosity angles |
| CN106769470A (en) * | 2016-12-30 | 2017-05-31 | 维沃移动通信有限公司 | A kind of survey tool for test material mechanical property parameters |
| CN107044941A (en) * | 2017-03-24 | 2017-08-15 | 中国科学院金属研究所 | A kind of single shear performance test methods for being widely used in minute sample |
| CN107966373A (en) * | 2017-11-13 | 2018-04-27 | 西安建筑科技大学 | Masonry cuts pressure device and masonry cuts pressure combined strength bination test method |
| CN110530714A (en) * | 2019-07-30 | 2019-12-03 | 广州市建筑科学研究院有限公司 | A kind of tubular pile concrete crack detection method and its device |
| CN111141621A (en) * | 2020-01-17 | 2020-05-12 | 三峡大学 | Experimental device for measuring rock shear strength of single rock sample and using method |
| CN112014199A (en) * | 2020-08-26 | 2020-12-01 | 东北大学 | Rock variable-angle shearing device and test method thereof |
Citations (2)
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| DE4424443A1 (en) * | 1993-08-09 | 1995-02-16 | Georg Fischer Giesereianlagen | Method and device for measuring properties of casting materials |
| CN201266153Y (en) * | 2008-06-24 | 2009-07-01 | 中国科学院武汉岩土力学研究所 | Angle variable board shearing device for cylindrical sample |
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2012
- 2012-09-03 CN CN2012103210731A patent/CN102830023A/en active Pending
Patent Citations (2)
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| DE4424443A1 (en) * | 1993-08-09 | 1995-02-16 | Georg Fischer Giesereianlagen | Method and device for measuring properties of casting materials |
| CN201266153Y (en) * | 2008-06-24 | 2009-07-01 | 中国科学院武汉岩土力学研究所 | Angle variable board shearing device for cylindrical sample |
Non-Patent Citations (1)
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| 黄英娣: "圆柱体岩块变角板试验结果分析", 《桂林工学院学报》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527172B (en) * | 2016-01-01 | 2018-05-11 | 三峡大学 | A kind of device and assay method for measuring ground cylinder sample Shear Strength Index |
| CN105510154A (en) * | 2016-01-01 | 2016-04-20 | 三峡大学 | Device for measuring shearing strength index of rock-soil specimen and measuring method |
| CN105527172A (en) * | 2016-01-01 | 2016-04-27 | 三峡大学 | Apparatus and method for measuring geotechnical cylindrical sample shear strength index |
| CN105606462A (en) * | 2016-01-01 | 2016-05-25 | 三峡大学 | Device and method for measuring rock sample shear strength indexes at different schistosity angles |
| CN105486583A (en) * | 2016-01-25 | 2016-04-13 | 重庆交通大学 | Soil body two-dimensional fracture testing method and device |
| CN106769470A (en) * | 2016-12-30 | 2017-05-31 | 维沃移动通信有限公司 | A kind of survey tool for test material mechanical property parameters |
| CN107044941A (en) * | 2017-03-24 | 2017-08-15 | 中国科学院金属研究所 | A kind of single shear performance test methods for being widely used in minute sample |
| CN107966373A (en) * | 2017-11-13 | 2018-04-27 | 西安建筑科技大学 | Masonry cuts pressure device and masonry cuts pressure combined strength bination test method |
| CN110530714A (en) * | 2019-07-30 | 2019-12-03 | 广州市建筑科学研究院有限公司 | A kind of tubular pile concrete crack detection method and its device |
| CN111141621A (en) * | 2020-01-17 | 2020-05-12 | 三峡大学 | Experimental device for measuring rock shear strength of single rock sample and using method |
| CN111141621B (en) * | 2020-01-17 | 2022-09-16 | 三峡大学 | Experimental device for measuring rock shear strength of single rock sample and using method |
| CN112014199A (en) * | 2020-08-26 | 2020-12-01 | 东北大学 | Rock variable-angle shearing device and test method thereof |
| CN112014199B (en) * | 2020-08-26 | 2021-09-28 | 东北大学 | Rock variable-angle shearing device and test method thereof |
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Application publication date: 20121219 |