CN208420550U - A kind of device for realizing rock tensile shear testing using universal testing machine - Google Patents
A kind of device for realizing rock tensile shear testing using universal testing machine Download PDFInfo
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- CN208420550U CN208420550U CN201821039102.4U CN201821039102U CN208420550U CN 208420550 U CN208420550 U CN 208420550U CN 201821039102 U CN201821039102 U CN 201821039102U CN 208420550 U CN208420550 U CN 208420550U
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- pedestal
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Abstract
A kind of device for realizing rock tensile shear testing using universal testing machine, including clamp assemblies, charging assembly and movable cushion block, specimen holder component includes inverted T-shape pedestal, first base fixing screws, second base fixing screws, third pedestal fixing screws, 4th pedestal fixing screws baffle, upper cover, fixed plate and first, second, third is oriented to fixed bolt, charging assembly includes cylinder-shaped link and trapezoidal loading head wide at the top and narrow at the bottom, movable cushion block is placed in 90 ° of Angle Positions of inverted T shaped chassis left side, upper cover is opened there are three screwing through hole, first, second, third guiding fixed bolt passes through screwing through hole and connect with fixed plate.The device accurately measures the intensity and deformation under the conditions of rock material drawing is cut by universal test function.
Description
Technical field
The utility model relates to a kind of universal testing machines to realize rock tensile shear testing device, be suitable under the conditions of tension-shear tests
The deformation failure characteristic research of rock, belongs to rock mechanics and engineering technical field.
Background technique
Tensile shear destruction is a kind of rock often occurred in crag Geological Engineering, rock slope engineering and rock tunnel engineering
Stone unstability type.The destruction of rock tensile shear is the bursting form under a kind of particular stress status condition, is belonged to while by vertical
In the normal direction tensile stress and the combined rupture mode for the shear stress effect for being parallel to the plane of fracture of the plane of fracture.Such as: draw scissors-type crag
Under by Dangerous Rock Body gravity itself, generation drawing breaks bad；Deep cavern excavation makes abutment wall normal direction crustal stress off-load and tangential
Crustal stress concentrate, when off-load strongly when may occur draw break it is bad；The excavation off-load of rock side slope can lead to top slopes
Tension Stress Zone is generated, which is typically in i.e. tension and composite stress state is cut in the drawing cut.Therefore, study of rocks is drawn
It cuts mechanical characteristic and is of great significance to rock mass engineering project design and construction and estimation of stability with control.
The purpose of this utility model be to provide in a kind of test it is contemplated that rock sample size, crack length, width with
And inclination angle, crackle and point of load application relative position, interaction etc. influences rock sample stress destruction between free face length and rock sample
Many factors experimental rig；The destructive test of the rock sample under different stress with precrack may be implemented, use
In the experimental rig of simulation rock sample tension fail in shear.
As the important means for obtaining Rock Shear Strength Parameter, rock compression-shear test (including indoor and in-situ test) is
It is widely used in geotechnical engineering.But due to technical difficulty, the development of rock tensile shear testing is less, and grinding for mechanical characteristic is cut in drawing
Study carefully also few compared with compression shear mechanical characteristic more.Common practice is mole coulomb criterion of strength fitting a straight line for obtaining compression-shear test
The negative semiaxis of normal stress axis is extended to, as criterion of strength of the rock under tension-shear tests, and this processing is a lack of test number
According to support.
To obtain the rock direct shearing mechanical property under the conditions of normal direction tensile stress, means few in number at present are main
Have: 1) a whole set of special SERVO CONTROL rock tensile shear testing system of manufacture；2) manufacture is using pedestal-reaction frame as primary structure, liquid
Pressure jack is that system is cut in the rock drawing of loading method.But the first testing equipment cost is sufficiently expensive, although second of cost
It is moderate, but due to the deficiency of control system (such as hydraulic jack keeps the ineffective of steady load), test accuracy can not
Guarantee.The purpose of this utility model is the shortage and deficiency for existing rock tensile shear testing equipment, and providing one kind can be omnipotent
The rock tensile shear testing device used on testing machine, for obtain rock draw the mechanical characteristic for cutting under combined load provide conveniently, it is low
Honest and clean, the guaranteed research technique of accuracy.
Summary of the invention
Rock tensile shear testing is realized using universal testing machine in view of the shortcomings of the prior art, the utility model provides a kind of
Device to carry out rock tensile shear testing in conjunction with universal testing machine.
The utility model is realized in this way: a kind of device for realizing rock tensile shear testing using universal testing machine, it is special
Sign is, including clamp assemblies, charging assembly and movable cushion block, the clamp assemblies include inverted T-shape pedestal, baffle, upper cover,
Fixed plate and the first, second, third guiding fixed bolt, in addition subsidiary the first, second, third, fourth pedestal fixed screw, bottom
It seat, baffle and is integrated with upper cover in groove type, upper cover is equipped with three screw holes, and the first, second, third guiding fixed bolt hangs down
Directly simultaneously parallel with baffle with upper cover in pedestal, each be oriented on fixed bolt is respectively provided with nut, the first, second, third fixed guide
Determine stud to be connected across the screw hole of upper cover with fixed plate, before the first, second, third, fourth pedestal fixed screw passes through pedestal
Two screw hole joint test platforms afterwards；
The charging assembly includes cylinder-shaped link and trapezoidal loading head wide at the top and narrow at the bottom, cylinder-shaped link connection ten thousand
The pressure sensor and trapezoidal loading head of energy testing machine, trapezoidal loading head are connected together mounted in universal test with cylinder-shaped link
On machine；
90 ° of Angle Positions that the movable cushion block is placed in inverted T shaped chassis left side supplement use when carrying out big specimen test.
According to the above scheme, pedestal and universal testing machine by the first, second, third, fourth pedestal fixed screw with it is omnipotent
Testing machine pedestal is connected, and position base can be adjusted according to test requirements document.
According to the above scheme, the first, second, third, fourth pedestal fixing screws are roller screw, base screw installation
The shape and cylinder screw in hole cooperate.
According to the above scheme, the first, second, third guiding fixed screw is cylinder screw, upper cover screw mounting hole
Shape and cylinder screw cooperate.
According to the above scheme, fixed plate and the first, second, third guiding fixed bolt can be according in the sizes of rock sample
Lower parallel adjusting.
According to the above scheme, pedestal, baffle and upper cover are a rigidly connected integrated member.
According to the above scheme, movable cushion block is as supplementary device, it can be achieved that the rock tensile shear testing of sizes.
Compared with prior art, the utility model have the utility model has the advantages that
(1) realize that characteristic research is cut in the drawing of a variety of different size rock samples: present apparatus maximum can be used for having a size of 200mm
The tensile shear testing of × 200mm × 200mm (length × width × height) rock sample.
(2) present apparatus may be implemented to carry out load test to the rock sample of different precracks, can obtain different cracks
Stress, the displacement data of lower rock sample tensile shear testing process.Present apparatus pedestal may be implemented to crackle side in rock sample not
It is loaded, is can be obtained under the loading environment away from crackle different location with position, load destroys the influence of situation to rock sample.This dress
It sets guiding screw pole and fixed plate controls rock sample height, the fixed mode of nut can carry out load test to the rock sample of different height,
Different rock sample height in adequacy test；The free face of present apparatus movable cushion block analog rock mass stress destruction, and probe into and face sky
Influence of the face length to rock mass damage form.
(3) easy to operate: cube specimen to be installed in device, according to the loading method of common experiment of machanics, by lotus
Load is applied on device, so that it may realize the tensile shear testing of test specimen.
(4) by means of universal testing machine, intensity and deformation under the conditions of rock material drawing is cut can accurately be measured.Fixture
Installation and removal are convenient, and test process is easily operated.Therefore, existing rock tensile shear testing equipment, this tensile shear testing dress are compared
It sets simpler and more practical.
(5) rock sample is realized in the mechanical test for drawing condition of cutting, to analyze the change in rock mass under tension-shear tests state
Shape destructive characteristics provide effective research method.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of clamp assemblies.
Fig. 2 is clamp assemblies structural profile illustration.
Fig. 3 is the structural schematic diagram of charging assembly.
Fig. 4 is charging assembly structural profile illustration.
Fig. 5 is the structural schematic diagram of movable cushion block.
Fig. 6 is to draw to cut device overall structure diagram
Fig. 7 is to draw to cut device overall structure main view.
Fig. 8 is to draw to cut device overall structure rearview.
Fig. 9 is to draw to cut device overall structure left view
Figure 10 is to draw to cut device overall structure right view
Figure 11 is to draw to cut device overall structure top view
Marked in the figure: 1- pedestal, 2- first base fixing screws, 3- second base fixing screws, 4- third pedestal are fixed
Screw, the 4th pedestal fixing screws of 5-, 6- baffle, 7- upper cover, 8 first guiding fixed bolts, 9- second be oriented to fixed bolt,
10- third is oriented to fixed bolt, 11- fixed plate, 12- cylinder-shaped link, the trapezoidal loading head of 13-, 14- movable cushion block.
Specific embodiment
The technical solution of the utility model is further elaborated below by example.
Embodiment 1
It is a kind of using universal testing machine realize rock tensile shear testing device, including sample holder component, charging assembly and
Movable cushion block.
The clamp assemblies include that pedestal 1, first base fixing screws 2, second base fixing screws 3, third pedestal are solid
Determine screw 4 and the 4th pedestal fixing screws 5, baffle 6, upper cover 7, first are oriented to fixed bolt 8, second and are oriented to fixed bolt 9, the
Three guiding fixed bolts 10 and fixed plate 11,1 front and rear sides of pedestal are respectively opened up there are two screwing through hole, and first base is fixed
Screw 2, second base fixing screws 3, third pedestal fixing screws 4 and the 4th pedestal fixing screws 5 pass through screw hole and test
The connection of board seat, the upper cover 7 are opened up there are three screw hole, and the first guiding fixed bolt 8, second is oriented to fixed bolt 9, the
Three guiding fixed bolts 10 pass through screw hole and connect with fixed plate 11.Pedestal 1, baffle 6 and upper cover 7 are one rigidly connected whole
Body component.
The charging assembly includes cylinder-shaped link 12 and trapezoidal loading head 13, cylinder-shaped link 12 and trapezoidal load
First 13 be rigid connection, and cylinder-shaped link 12 and trapezoidal loading head 13 are commonly connected on universal testing machine load column.
The movable cushion block 14 is placed in 90 ° of Angle Positions of inverted T shaped chassis left side.
Utility model device has using steps are as follows:
(1) processing of prefabricated rock sample, sample must be smooth, pre-processes before test to crackle, precrack point
For different length, width and inclination angle.
(2) install charging assembly: the cylinder-shaped link 12 on charging assembly top and the load column of universal testing machine connect
It is connected together, the trapezoidal loading head 13 of charging assembly lower part is contacted with rock sample
(3) clamp assemblies are installed: unclamping 1 first base fixing screws 2, second base fixing screws 3, third on pedestal
Clamp assemblies are placed in the designated position of testing machine pedestal by pedestal fixing screws 4, the 4th pedestal fixing screws 5, install fixed spiral shell
Nail, is tightly fixed to charging assembly on testing machine pedestal.It unclamps the first guiding fixed bolt 8 above upper cover 7, second lead
It is oriented to fixed bolt 10 to fixed bolt 9, third, separates fixed plate 11 with stud.
(4) it places rock sample: the upper end position that prefabricated rock sample is placed in inverted T-shape pedestal 1 (is placed big
Movable cushion block is first placed in 90 ° of the left side Angle Position of inverted T-shape pedestal when size rock sample), fixed plate is placed on rock sample
Side is oriented to fixed bolt 9 close to the side of baffle 11, by the first guiding fixed bolt 8, second, third guiding fixed bolt 10 is worn
It crosses the screw hole of upper cover and is aligned with the flight in fixed plate 11.
(5) fixed rock sample: the first guiding fixed bolt 8, second guiding fixed bolt 9 is turned, third guiding is fixed
Stud 10 allows fixed plate 11 to be fitted tightly over above rock sample, is secured entirely on rock sample among device.
(6) it loads: after rock sample is fixed on device, starting universal testing machine, using charging assembly (12,13) to rock
Sample is loaded.
(7) change loading position: loosen 2, second fixing screws 3 of First fixing screws, third seat fixing screws 4,
4th pedestal fixing screws 5 realize the variation to rock sample side loading Position by adjusting the position of movable pedestal 1.
(8) change the length of free face: so that the rock sample of identical size is in different free faces by additional active cushion block,
It is reloaded in the identical situation of other experimental conditions.
The working principle of the present apparatus is: using the fixed rock sample one end of the chucking power of device clamp assemblies, carrying out to the other end
The line load of fixed position, makes the pressure of universal testing machine be converted into drawing shearing, and load is cut in the drawing for being achieved in rock sample.Institute
The effect for stating clamp assemblies is fixed rock sample, and the effect of the charging assembly is to convert rock for the pressure of universal testing machine
The shearing of drawing suffered by stone sample.In load test, in the identical situation of other experimental conditions, only change the length of crackle in rock sample
Degree, width, inclination angle, the rock sample of identical size will appear in test different failure mode and stress state, the length of free face
Degree variation and the variation of loading position can also generate certain influence to the collapse state of rock sample.Therefore, fragile material is filling
It carries out drawing in setting and cuts failure test, different experimental conditions is set by device, and the deformation failure result of material is different.
Claims (7)
1. a kind of device for realizing rock tensile shear testing using universal testing machine, which is characterized in that including clamp assemblies, load group
Part and movable cushion block, the clamp assemblies include inverted T-shape pedestal, baffle, upper cover, fixed plate and the first, second, third guiding
Fixed bolt, in addition incidentally the first, second, third, fourth pedestal fixed screw, pedestal, baffle and upper cover are integrated in recessed
Flute profile, upper cover are equipped with three screw holes, and the first, second, third guiding fixed bolt is simultaneously parallel with baffle with upper cover perpendicular to pedestal,
Nut is respectively provided on each guiding fixed bolt, the first, second, third guiding fixed bolt passes through the screw hole and fixed plate of upper cover
It is connected, the first, second, third, fourth pedestal fixed screw passes through two before and after pedestal screw hole joint test platforms；
The charging assembly includes cylinder-shaped link and trapezoidal loading head wide at the top and narrow at the bottom, and cylinder-shaped link connects omnipotent examination
The pressure sensor and trapezoidal loading head of machine are tested, trapezoidal loading head is connected together mounted in universal testing machine with cylinder-shaped link
On；
90 ° of Angle Positions that the movable cushion block is placed in inverted T shaped chassis left side supplement use when carrying out big specimen test.
2. as described in claim 1 using universal testing machine realize rock tensile shear testing device, which is characterized in that pedestal with
Universal testing machine is connected by the first, second, third, fourth pedestal fixed screw with universal testing machine pedestal, position base
It can be adjusted according to test requirements document.
3. the device of rock tensile shear testing is realized using universal testing machine as described in claim 1, which is characterized in that described the
One, second, third, the 4th pedestal fixing screws be roller screw, the shape of base screw mounting hole and cylinder screw cooperate.
4. the device of rock tensile shear testing is realized using universal testing machine as described in claim 1, which is characterized in that described the
One, second, third guiding fixed screw is cylinder screw, and the shape and cylinder screw of upper cover screw mounting hole cooperate.
5. the device of rock tensile shear testing is realized using universal testing machine as described in claim 1, it is characterised in that fixed plate
It can be adjusted according to the size of rock sample is parallel up and down with the first, second, third guiding fixed bolt.
6. the device of rock tensile shear testing is realized using universal testing machine as described in claim 1, it is characterised in that pedestal, gear
Plate and upper cover are a rigidly connected integrated member.
7. the device of rock tensile shear testing is realized using universal testing machine as described in claim 1, which is characterized in that activity mat
Block is as supplementary device, it can be achieved that the rock tensile shear testing of sizes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821039102.4U CN208420550U (en) | 2018-06-29 | 2018-06-29 | A kind of device for realizing rock tensile shear testing using universal testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821039102.4U CN208420550U (en) | 2018-06-29 | 2018-06-29 | A kind of device for realizing rock tensile shear testing using universal testing machine |
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| Publication Number | Publication Date |
|---|---|
| CN208420550U true CN208420550U (en) | 2019-01-22 |
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| CN201821039102.4U Expired - Fee Related CN208420550U (en) | 2018-06-29 | 2018-06-29 | A kind of device for realizing rock tensile shear testing using universal testing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346282A (en) * | 2019-07-09 | 2019-10-18 | 中南大学 | Interface bonding strength test device and test method between a kind of cement-based material |
-
2018
- 2018-06-29 CN CN201821039102.4U patent/CN208420550U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346282A (en) * | 2019-07-09 | 2019-10-18 | 中南大学 | Interface bonding strength test device and test method between a kind of cement-based material |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190122 Termination date: 20210629 |