CN102323142A - Shear box device for rock indoor direct shear test - Google Patents
Shear box device for rock indoor direct shear test Download PDFInfo
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- CN102323142A CN102323142A CN201110260507A CN201110260507A CN102323142A CN 102323142 A CN102323142 A CN 102323142A CN 201110260507 A CN201110260507 A CN 201110260507A CN 201110260507 A CN201110260507 A CN 201110260507A CN 102323142 A CN102323142 A CN 102323142A
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Abstract
The invention relates to a rock indoor direct shear test technology, more concretely relates to a shear box device for a rock indoor direct shear test, and belongs to the rock mechanics technical field. The shear box device for the rock indoor direct shear test comprises an upper shear box device and a lower shear box device, a pair of in-line ball rows are provided between the upper shear box device and the lower shear box device, the pair of in-line ball rows are mutually paralleled which are inlaid in the grooves on the top of the front and back wall surfaces of the lower shear box. The shear box device changes a traditional shear box structure, because the upper shear box uses a half-headed mode during the direct shear test, the problem that the width of the shearing seam can not be controlled due to the sample sizes and processing differences is solved, the arrangement of the in-line ball rows realizes the positioning of shear plane of the rock samples and avoids the phenomenon of twist-off but not shear-off of samples. The shear box device of the invention has the advantages of simple structure, easy manufacture, convenient operation and wide application.
Description
Technical field
The present invention relates to the indoor direct shear test technology of rock, more specifically relate to the shear box device of the indoor direct shear test of a kind of rock, belong to the rock mechanics technical field.
Background technology
The indoor direct shear test of rock and structural plane adopts flat stacking usually; Rock sample is placed in the down cut box; To go up and shear lid on rock sample, between upper and lower shear box, reserve the shearing seam of certain width, on last shear box, apply normal load; On the down cut box, apply shear-type load, make rock sample generation shear failure and measure its shear resistance with this.
According to national correlation test standard, when carrying out direct shear test, the action direction of normal load and shear-type load should be through the geometric center of the predetermined shear surface of rock sample.In the indoor direct shear test of present rock, last shear box is directly to cover on the rock sample, and rock sample can produce compression deformation under the normal load effect; Can be delivered on the rock sample rather than in order to ensure normal load and to bear by shear box; Must stitch in the shearing of reserving certain width up and down between the shear box, but because rock sample processing there are differences, the height of rock sample has nothing in common with each other; Reservation when causing different specimen test is sheared the seam width and is had nothing in common with each other; Can't guarantee that shear-type load passes through the geometric center of predetermined shear surface, the phenomenon that rock sample is twisted off rather than cuts off often takes place in test, cause test failure.
Summary of the invention
To above-mentioned existing problems, the object of the present invention is to provide the shear box device of the indoor direct shear test of a kind of rock.
To achieve these goals, technical solution of the present invention is: the shear box device of the indoor direct shear test of rock comprises shear box; The down cut box; And being arranged on the reaction support on the wall of shear box limit, the described box body of going up shear box is provided with a pair of in-line arrangement ball row up and down for connecting shape between last shear box and down cut box; A pair of in-line arrangement ball row is parallel to each other, and is embedded in the groove at former and later two wall tops of down cut box.
Height≤the 1mm of described in-line arrangement ball row 4 protrusion down cut boxes 3 end faces.
Former and later two internal face length of length and down cut box of described in-line arrangement ball row are consistent.
Owing to adopted above technical scheme; Shear box device of the present invention has adopted the half-headed structure that goes up shear box and in-line arrangement ball row is set between the shear box up and down; The half-headed shear box of going up has been guaranteed that normal load acts directly on the rock sample rather than by last shear box and has been passed to rock sample; Therefore need not between the shear box up and down to reserve to shear seam; Because in-line arrangement ball row's setting is direct sliding contact between the shear box up and down, has realized the location to the rock sample shear surface; So just can guarantee the geometric center of the action direction of normal load and shear-type load, the phenomenon of having avoided sample to twist off rather than cut off through the rock sample shear surface.
The shear box device of the indoor direct shear test of rock of the present invention has changed the structure of traditional shear box; When being used for direct shear test; Because last shear box adopts no top cover mode; Solved the uncontrollable problem of shearing seam width that causes because of the specimen size processing differences, in-line arrangement ball row is provided with the location of having realized the rock sample shear surface, the phenomenon of having avoided rock sample to twist off rather than cut off.Shear box apparatus structure of the present invention is simple, is easy to make, and easy to operate, applicability is wide.
Description of drawings:
Accompanying drawing is the shear box apparatus structure synoptic diagram of the indoor direct shear test of rock of the present invention;
Embodiment:
Below in conjunction with accompanying drawing, the present invention is further described.
See accompanying drawing.
The shear box device of the indoor direct shear test of rock comprises shear box 1, down cut box 3.Down cut box 3 is one not have the square box body of loam cake, and manufacturing materials adopts plow-steel, has gap along the box side wall of shearing motion direction one side; So that give the shear displacemant slot milling, the front and back outer wall of down cut box 3 box bodys is provided with thrust axis, applies shear-type load through thrust axis during test; Have groove at former and later two wall tops of down cut box 3 box bodys, be inlaid with in-line arrangement ball row 4 in the groove respectively, the height≤1mm of described in-line arrangement ball row 4 protrusion down cut boxes 3 end faces; In-line arrangement ball row 4 length is consistent with down cut box 3 former and later two internal face length, and a pair of in-line arrangement ball row 4 is parallel to each other, with the influence that reduces to rub to shearing motion; Last shear box 1 places on the in-line arrangement ball row 4 who is located on the down cut box 3, and last shear box 1 is the square box body of equal uncovered up and down, and empty size is identical with down cut box 3 in it; Manufacturing materials adopts plow-steel, is provided with reaction support 2 along the box side wall of shearing motion direction one side, and reaction support 2 is a bar shaped contract piece; Corresponding with the gap on being located at the down cut box; Reaction support 2 outer faces are circular-arc, to guarantee that the counter-force that applies is a linear load
The principle of work of the shear box device of the indoor direct shear test of rock of the present invention.
During test, the whole shear box device is placed in the testing machine framework, between down cut box 3 and testing machine framework, is provided with ball row; With the influence that reduces to rub to shearing motion, rock sample is positioned in shear box 1 and the down cut box 3, and 2 blocks of normal pressure plates are placed on rock sample top; Between 2 blocks of normal pressure plates, place ball row; To eliminate frictional influence, testing machine applies normal load through the normal pressure plate to rock sample, and the counter-force that applies through reaction support 2 makes shear box 1 keep motionless; Thrust axis through being arranged on the down cut box 3 applies shear-type load by predetermined scheme; Drive down cut box 3 and go up shear box 1 generation shear displacemant relatively, and the while writing-method is to displacement and shear displacemant, until rock sample generation shear failure.The relation curve of arrangement shear stress and shear displacemant and shear stress and normal direction displacement is confirmed the shear resistance of rock sample and is sheared the mechanical characteristics in each stage.
Claims (3)
1. the shear box device of the indoor direct shear test of rock; Comprise shear box (1), down cut box (3), and be arranged on reaction support (2) on the wall of shear box (1) limit; It is characterized in that: the described box body of going up shear box (1) is up and down for connecting shape; Between last shear box (1) and down cut box (3), be provided with a pair of in-line arrangement ball row (4), a pair of in-line arrangement ball row (4) is parallel to each other, and is embedded in the groove at former and later two wall tops of down cut box (3).
2. the shear box device of the indoor direct shear test of rock as claimed in claim 1 is characterized in that: described in-line arrangement ball row's (4) length is that former and later two internal face length of down cut box (3) are consistent.
3. the shear box device of the indoor direct shear test of rock as claimed in claim 1 is characterized in that: the height≤1mm of described in-line arrangement ball row (4) protrusion down cut box (3) end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110260507A CN102323142A (en) | 2011-09-05 | 2011-09-05 | Shear box device for rock indoor direct shear test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110260507A CN102323142A (en) | 2011-09-05 | 2011-09-05 | Shear box device for rock indoor direct shear test |
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| CN102323142A true CN102323142A (en) | 2012-01-18 |
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| CN201110260507A Pending CN102323142A (en) | 2011-09-05 | 2011-09-05 | Shear box device for rock indoor direct shear test |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944665A (en) * | 2012-11-22 | 2013-02-27 | 武汉大学 | Shear box applicable to rock joint shearing, seepage and coupling tests and test method |
| CN103323327A (en) * | 2013-06-25 | 2013-09-25 | 青岛理工大学 | Shearing box device for rock-like material |
| CN103969132A (en) * | 2014-04-23 | 2014-08-06 | 深圳市工勘岩土集团有限公司 | Visualized earthwork direct shearing device and method |
| CN104142274A (en) * | 2013-05-09 | 2014-11-12 | 深圳市工勘岩土工程有限公司 | Rock soil direct shear test apparatus and method thereof |
| CN104849150A (en) * | 2015-05-27 | 2015-08-19 | 中国矿业大学 | Shear box device having self-adaptive structural plane |
| CN105043900A (en) * | 2015-07-03 | 2015-11-11 | 合肥工业大学 | Apparatus for testing shear strength of rocks under wet-dry alternation action, and test method thereof |
| CN105334116A (en) * | 2015-10-28 | 2016-02-17 | 广东工业大学 | Solidified soil direct shear apparatus |
| CN105823693A (en) * | 2016-05-04 | 2016-08-03 | 重庆大学 | Rock mass shear test box |
| CN106525576A (en) * | 2016-11-25 | 2017-03-22 | 中国人民解放军61489部队 | Embedded concrete shear stress sensor |
| CN107884287A (en) * | 2017-11-14 | 2018-04-06 | 郑州工程技术学院 | A kind of ground direct shear test device and method |
| CN108225944A (en) * | 2018-01-22 | 2018-06-29 | 西南交通大学 | A kind of rubble railway ballast direct shear test instrument |
| CN108801806A (en) * | 2018-05-03 | 2018-11-13 | 南昌大学 | A kind of multifunctional large-scale temperature control saturation staight scissors simple shear double-purpose instrument |
| CN114397186A (en) * | 2022-01-16 | 2022-04-26 | 李成虎 | Test device for combined action of normal pressure and other loads of composite material laminated plate |
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- 2011-09-05 CN CN201110260507A patent/CN102323142A/en active Pending
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944665B (en) * | 2012-11-22 | 2015-10-21 | 武汉大学 | Be applicable to shear box and the test method of rock joint shear seepage coupling test |
| CN102944665A (en) * | 2012-11-22 | 2013-02-27 | 武汉大学 | Shear box applicable to rock joint shearing, seepage and coupling tests and test method |
| CN104142274A (en) * | 2013-05-09 | 2014-11-12 | 深圳市工勘岩土工程有限公司 | Rock soil direct shear test apparatus and method thereof |
| CN103323327A (en) * | 2013-06-25 | 2013-09-25 | 青岛理工大学 | Shearing box device for rock-like material |
| CN103969132A (en) * | 2014-04-23 | 2014-08-06 | 深圳市工勘岩土集团有限公司 | Visualized earthwork direct shearing device and method |
| CN104849150B (en) * | 2015-05-27 | 2017-07-11 | 中国矿业大学 | A kind of adaptive structure face shear box device |
| CN104849150A (en) * | 2015-05-27 | 2015-08-19 | 中国矿业大学 | Shear box device having self-adaptive structural plane |
| CN105043900A (en) * | 2015-07-03 | 2015-11-11 | 合肥工业大学 | Apparatus for testing shear strength of rocks under wet-dry alternation action, and test method thereof |
| CN105334116B (en) * | 2015-10-28 | 2018-06-19 | 广东工业大学 | A kind of solidified earth direct shear apparatus |
| CN105334116A (en) * | 2015-10-28 | 2016-02-17 | 广东工业大学 | Solidified soil direct shear apparatus |
| CN105823693A (en) * | 2016-05-04 | 2016-08-03 | 重庆大学 | Rock mass shear test box |
| CN105823693B (en) * | 2016-05-04 | 2019-01-18 | 重庆大学 | Rockmass shear test box |
| CN106525576A (en) * | 2016-11-25 | 2017-03-22 | 中国人民解放军61489部队 | Embedded concrete shear stress sensor |
| CN106525576B (en) * | 2016-11-25 | 2023-08-25 | 中国人民解放军61489部队 | Embedded concrete shear stress sensor |
| CN107884287A (en) * | 2017-11-14 | 2018-04-06 | 郑州工程技术学院 | A kind of ground direct shear test device and method |
| CN108225944A (en) * | 2018-01-22 | 2018-06-29 | 西南交通大学 | A kind of rubble railway ballast direct shear test instrument |
| CN108801806A (en) * | 2018-05-03 | 2018-11-13 | 南昌大学 | A kind of multifunctional large-scale temperature control saturation staight scissors simple shear double-purpose instrument |
| CN114397186A (en) * | 2022-01-16 | 2022-04-26 | 李成虎 | Test device for combined action of normal pressure and other loads of composite material laminated plate |
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Application publication date: 20120118 |