CN201301456Y - Rotation prevention clamp for testing contact mechanics characteristic of cementation granules - Google Patents
Rotation prevention clamp for testing contact mechanics characteristic of cementation granules Download PDFInfo
- Publication number
- CN201301456Y CN201301456Y CNU2008201543749U CN200820154374U CN201301456Y CN 201301456 Y CN201301456 Y CN 201301456Y CN U2008201543749 U CNU2008201543749 U CN U2008201543749U CN 200820154374 U CN200820154374 U CN 200820154374U CN 201301456 Y CN201301456 Y CN 201301456Y
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- anchor clamps
- shaped anchor
- clevis tool
- horizontal part
- groove
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Abstract
The utility model discloses a rotation prevention clamp for testing the contact mechanics characteristic of cementation granules, which comprises an L-shaped clamp (1) and an N-shaped clamp (2); the L-shaped clamp (1) comprises a horizontal section (11) and a vertical section (12), and the N-shaped clamp (2) comprises a first vertical section (21), a first horizontal section (22) and a section vertical section (23); wherein, a surface of the first horizontal section (22) of the N-shaped clamp (2), which is opposite to the horizontal section (11) of the L-shaped clamp (1) is a horizontal plane, the N-shaped clamp (2) and the L-shaped clamp (1) are respectively provided with a groove (3) in which cementation granules can be put, the centers of the two grooves form a line in vertical direction, the openings of the two grooves are in opposite directions, two clamp plates (7) are respectively arranged at both front and rear sides of the L-shaped clamp (1) and the N-shaped clamp (2), and the two clamp plates (7) are fixed on a clamp through screws. The mechanical characteristic of contact points of cementation granules can be determined accurately by adopting the structure.
Description
Technical field
The utility model relates to a kind of shearing resistance, torsion resistant test device, particularly a kind of anti-rotation anchor clamps of testing cement particle contact mechanics characteristic.
Background technology
Usually run into sand foundation in Foundation Design and the underground construction.This class engineering design at present or by rule of thumb, or adopt finite element method to carry out numerical simulation.But finite element method is based on the numerical method of Continuum Mechanics, is used to analyze sand and has very big defective, and analysis result is often unreliable.Analyze this discreteness granular material of sand, a kind of more efficient methods is a discrete element method.Discrete element method is a kind of numerical simulation technology based on the discontinuous media mechanics.The crucial part of discrete element method is the contact mechanics between the particle, promptly contacts constitutive relation.Discrete element method successfully has been used for the numerical simulation of non-cement particle mechanics of materials behaviors such as dry sand.But on-the-spot topsoil and dry sand have some distinct mechanical behaviors, and this is because most of topsoil has microstructure, promptly has cement between the soil particle.Set up the cement particle contact mechanics by test, can realize the discrete element numerical simulation of topsoil, for the design of Foundation Design and underground construction provides theoretical direction.Existing test result has only been measured the mechanical characteristic of cement particle contact point when shearing merely and reversing merely, and can not measure the cement particle contact point at different normal pressure down cuts and the mechanical characteristic that reverses.
The utility model content
The technical problems to be solved in the utility model provides the shearing resistance of a kind of mensuration cement particle contact point, torsion resistant test device.
For solving the problems of the technologies described above, the anti-rotation anchor clamps of the utility model test cement particle contact mechanics characteristic comprise L shaped anchor clamps, N clevis tool, L shaped anchor clamps are made up of horizontal part and vertical component effect, N clevis tool is by first vertical component effect, first horizontal part and second vertical component effect are formed, the opposite face of first horizontal part of N clevis tool and the horizontal part of L shaped anchor clamps is a horizontal plane, one groove that can put into cement particle is set respectively on N clevis tool and the L shaped anchor clamps, the line of centres of described two grooves is a vertical direction, the opening direction of described two grooves is relative, the both sides of described L shaped anchor clamps and described N clevis tool are provided with two clamping plate respectively, described clamping plate by screw on the horizontal part of described L shaped anchor clamps.
The anti-rotation anchor clamps of another kind of test cement particle contact mechanics characteristic, comprise L shaped anchor clamps, N clevis tool, L shaped anchor clamps are made up of horizontal part and vertical component effect, N clevis tool is by first vertical component effect, first horizontal part and second vertical component effect are formed, the opposite face of first horizontal part of N clevis tool and the horizontal part of L shaped anchor clamps is a horizontal plane, one groove that can put into cement particle is set respectively on N clevis tool and the L shaped anchor clamps, the line of centres of described two grooves is a vertical direction, the opening direction of described two grooves is relative, the both sides of described L shaped anchor clamps and described N clevis tool are provided with two clamping plate respectively, clamping plate by screw on first horizontal part of N clevis tool.
As the preferred version of such scheme, second vertical component effect of N clevis tool and the horizontal part horizontal direction of L shaped anchor clamps and vertical direction all are provided with the gap; First vertical component effect of N clevis tool and the horizontal part of L shaped anchor clamps are provided with the gap in the horizontal direction.
Preferably, the horizontal part upper groove arranged outside of L shaped anchor clamps is the inclined-plane.
Preferably, first horizontal part outside of N clevis tool is provided with an arc groove, its center is on the two groove lines of centres of fixing cement particle, first vertical component effect outside of N clevis tool is provided with a shearing application of force groove, and reverses application of force groove and more than one complicated application of force groove, shear application of force groove on the horizontal plane at the opposite face place of N clevis tool and L shaped anchor clamps, reverse the end that application of force groove is located at N clevis tool first vertical component effect, complicated application of force groove is being sheared application of force groove and is being reversed between the application of force groove; Second vertical component effect outside close end of N clevis tool is provided with one and reverses application of force groove; The vertical component effect outside of L shaped anchor clamps also is provided with one and shears application of force groove, and the groove line of centres on groove on the L shaped anchor clamps and the N clevis tool is on opposite face.
After adopting such structure, the utility model can be measured the cement particle contact point at different normal pressure down cuts and the mechanical characteristic that reverses.This microcosmic contact constitutive relation for cement particle is very important.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the structure chart of the anti-rotation anchor clamps of the utility model test cement particle contact mechanics characteristic.
Fig. 2 is the structure chart of voussoir.
Fig. 3 is the structure chart of clamping plate.
Fig. 4 is that voussoir control aluminium bar rotates schematic diagram.
Fig. 5 is that shear test loads schematic diagram.
Fig. 6 loads schematic diagram under the complex stress.
Fig. 7 loads the back schematic diagram under the complex stress.
Fig. 8 is that torsion test loads schematic diagram.
Fig. 9 is that torsion test loads the back schematic diagram.
Reference numeral is as follows:
1, L shaped anchor clamps 221, vertical application of force groove
11, horizontal part 231, reverse application of force groove
12, vertical component effect 3, groove
121, shear application of force groove 4, voussoir
2, N clevis tool 5, trip bolt
21, first vertical component effect 6, opposite face
22, second horizontal part 7, clamping plate
23, second vertical component effect 71, screwed hole
211, shear application of force groove 8, aluminium bar
212, reverse application of force groove 9, horizontal load
213, complicated application of force groove 10, vertical load
The specific embodiment
As shown in Figure 1, the anti-rotation anchor clamps of test cement particle contact mechanics characteristic comprise L shaped anchor clamps 1, N clevis tool 2, L shaped anchor clamps 1 are made up of horizontal part 11 and vertical component effect 12, N clevis tool 2 is made up of first vertical component effect 21, first horizontal part 22 and second vertical component effect 23, first horizontal part 22 of N clevis tool 2 is a horizontal direction with the opposite face 6 of the horizontal part 11 of L shaped anchor clamps 1, two fixedly grooves of cement particle are set respectively on the opposite face 6 of N clevis tool 2 and L shaped anchor clamps 1, the line of centres of two grooves is a vertical direction, and the opening direction of described two grooves is relative.
As Fig. 3 and shown in Figure 6, the both sides of L shaped anchor clamps 1 and N clevis tool 2 are provided with two clamping plate 7 respectively, on each clamping plate 7 by screw on L shaped anchor clamps 1.Clamping plate 7 also can be fixed on the N clevis tool 2, and four clamping plate 7 are separately fixed at the both sides of N clevis tool 2 by screw.By respectively opening two screwed holes on L shaped anchor clamps 1 both sides, by screw clamping plate 7 are tightened then, control the rotation of two anchor clamps with this.This device can be controlled the rotation of anchor clamps in the shear test process preferably, prevents that anchor clamps from taking place to control experimental precision preferably perpendicular to the jumping of paper direction.
Draw the groove of an arch respectively at N clevis tool 2 and L shaped anchor clamps 1, the arcuate part of the groove of this arch and the arch section of groove coincide, arch voussoir 4 is put into groove, the bottom of groove 3 is close to by the arch portion branch of voussoir 4, at the top of N clevis tool 2 and the bottom of L shaped anchor clamps 1 two or three screwed holes are set respectively, voussoir 4 are withstood by the trip bolt 5 that is arranged in the screwed hole.During the cement particle test, generally together with two aluminium bar 8 gluings in axial direction, thus shearing resistance, the antitorque mechanical characteristic of test binding material.As shown in Figure 5, gluing two aluminium bars 8 are together put into two grooves 3 from the side of L shaped anchor clamps 1 and N clevis tool 2, tighten trip bolt 5 then, thereby voussoir 4 is pressed on the aluminium bar 8.When carrying out shear test, as shown in Figure 5, if do not control voussoir 4 devices that aluminium bar 8 rotates, because the requirement of machining accuracy and fitting allowance, there is certain clearance between aluminium bar 8 and the groove, the line of centres of two aluminium bars 8 will deflect, and no longer perpendicular to the opposite face 6 that is positioned at horizontal plane, will cause measuring inaccurate like this., can limit two aluminium bars 8 and deflect according to voussoir 4 devices according to the utility model, thereby improve measurement accuracy.
Second vertical component effect 3 of N clevis tool 2 all is provided with the gap with horizontal part 11 horizontal directions and the vertical direction of L shaped anchor clamps 1; First vertical component effect 1 of N clevis tool 2 is provided with the gap in the horizontal direction with the horizontal part 11 of L shaped anchor clamps 1.
First horizontal part, 22 outsides of N clevis tool 2 are provided with a vertical application of force groove 221, and its center is on the line of centres of the fixing groove of cement particle.First vertical component effect, 1 outside of N clevis tool 2 is provided with a shearing application of force groove 211, and reverses application of force groove 212 and several complicated application of force grooves 213, shear application of force groove 211 on the horizontal plane at opposite face 6 places of N clevis tool 2 and L shaped anchor clamps 1, reverse the end that application of force groove 212 is located at N clevis tool 2 first vertical component effects 21; Second vertical component effect, 23 outside close ends of N clevis tool 2 are provided with one and reverse application of force groove 231, vertical component effect 12 outsides of L shaped anchor clamps 1 also are provided with one and shear application of force groove 121, and the shearing application of force groove 121 of L shaped anchor clamps 1 and shearing application of force groove 211 lines of centres on the N clevis tool 2 are on opposite face 6.
The utility model can on twin shaft loading equipemtn (as rock twin shaft flow graph), test respectively cement particle contact point under the different normal pressures shearing, reverse the mechanical characteristic under mechanical characteristic and the complex stress.
According to employed cement particle shape and size, required maximum displacement and required hard-over when reversing during shearing, and the concrete size of each parts of the utility model is determined in the restriction of loading equipemtn.What accompanying drawing 1-9 was given is at cylindrical particle, as aluminium bar 8, and the device of design.
The torsion test operating process, cement particle is an example with aluminium bar 8:
1, as shown in Figure 1 and Figure 4, the voussoir 4 of two arches is packed into earlier in L shaped anchor clamps 1 and the N clevis tool 2, the horizontal part 11 of L shaped anchor clamps 1 is relative with the horizontal part 22 of N clevis tool 2, gluing two aluminium bars 8 are together put into groove, tighten trip bolt 5 then.
2, this device is installed to twin shaft compression-loaded equipment such as rock twin shaft flow graph by mode shown in Figure 5.Horizontal load 9 point of applications are arranged on and reverse application of force groove 212 and reverse on the application of force groove 231.In each contact point coating lubricating oil, and make each parts contact good.
3, at first apply vertical load 10 to certain certain value, and then apply horizontal load 9.Use displacement control when level loads, set loading speed as required.What measure is that the granular cementation place is not having under pressure and the different pressures respectively, the mechanics parameter of shearing and torsion failure, and pressure is a disposable stationary value that applies, shearing and torsion load are to apply according to certain rate of displacement.Application of force order can not exchanging order.
The shear test operating process, cement particle is an example with aluminium bar 8:
1, with aluminium bar 8 by Fig. 1 and mode shown in Figure 4 this device of packing into, tight a bolt.
2, this device is installed to twin shaft compression-loaded equipment such as rock twin shaft flow graph by Fig. 8 mode.Horizontal load 9 point of applications are arranged on to be sheared on application of force groove 211 and the shearing application of force groove 121.Horizontal load 9 point of applications are arranged in each contact point coating lubricating oil, and make each parts contact good.
3, at first apply vertical load 10 to certain certain value, and then apply horizontal load 9.Use displacement control when level loads, set loading speed as required.
The installation of the cement particle contact mechanics characteristic test device under the complex stress as shown in Figure 6 and Figure 7.Horizontal load 9 point of applications are arranged on complicated application of force groove 213 and shear on the application of force groove 121.Other operations are identical with the shear test operating process.
Above-mentioned design example only is used for the utility model is described, and does not constitute the restriction to the claim scope, and other substantial equivalence means that it may occur to persons skilled in the art that are all in the utility model claim scope.
Claims (5)
1. anti-rotation anchor clamps of testing cement particle contact mechanics characteristic, it is characterized in that: comprise L shaped anchor clamps (1), N clevis tool (2), L shaped anchor clamps (1) are made up of horizontal part (11) and vertical component effect (12), N clevis tool (2) is by first vertical component effect (21), first horizontal part (22) and second vertical component effect (23) are formed, first horizontal part (22) of N clevis tool (2) is a horizontal plane with the opposite face (6) of the horizontal part (11) of L shaped anchor clamps (1), one groove (3) that can put into cement particle is set respectively on N clevis tool (2) and the L shaped anchor clamps (1), the line of centres of described two grooves (3) is a vertical direction, the opening direction of described two grooves (3) is relative, the both sides, front and back of described L shaped anchor clamps (1) and described N clevis tool (2) are provided with two clamping plate (7) respectively, described two clamping plate (7) by screw on the horizontal part (11) of described L shaped anchor clamps (1).
2. anti-rotation anchor clamps of testing cement particle contact mechanics characteristic, it is characterized in that: comprise L shaped anchor clamps (1), N clevis tool (2), L shaped anchor clamps (1) are made up of horizontal part (11) and vertical component effect (12), N clevis tool (2) is by first vertical component effect (21), first horizontal part (22) and second vertical component effect (23) are formed, first horizontal part (22) of N clevis tool (2) is a horizontal plane with the opposite face (6) of the horizontal part (11) of L shaped anchor clamps (1), one groove (3) that can put into cement particle is set respectively on N clevis tool (2) and the L shaped anchor clamps (1), the line of centres of described two grooves (3) is a vertical direction, the opening direction of described two grooves (3) is relative, the both sides, front and back of described L shaped anchor clamps (1) and described N clevis tool (2) are provided with two clamping plate (7) respectively, described two clamping plate (7) by screw on first horizontal part (22) of described N clevis tool (2).
3. the anti-rotation anchor clamps of test cement particle contact mechanics characteristic according to claim 1 and 2 is characterized in that: second vertical component effect (23) of N clevis tool (2) all is provided with the gap with horizontal part (11) horizontal direction and the vertical direction of L shaped anchor clamps (1); First vertical component effect (21) of N clevis tool (2) is provided with the gap in the horizontal direction with the horizontal part (11) of L shaped anchor clamps (1).
4. according to the anti-rotation anchor clamps of claim 1 or 2 or 3 described test cement particle contact mechanics characteristics, it is characterized in that: horizontal part (11) upper groove (3) arranged outside of L shaped anchor clamps (1) is the inclined-plane.
5. the anti-rotation anchor clamps of test cement particle contact mechanics characteristic according to claim 4, it is characterized in that: first horizontal part (22) outside of N clevis tool (2) is provided with an arc groove (221), its center is on two grooves (3) line of centres of fixing cement particle, first vertical component effect (21) outside of N clevis tool (2) is provided with one and shears application of force groove (211), one reverses application of force groove (212) and more than one complicated application of force groove (213), described shearing application of force groove (211) is on the horizontal plane at opposite face (6) place of N clevis tool (2) and L shaped anchor clamps (1), reverse the end that application of force groove (212) is located at N clevis tool (2) first vertical component effects (21), described complicated application of force groove (213) is positioned at shearing application of force groove (211) and reverses between the application of force groove (212); Second vertical component effect (23) outside close end of N clevis tool (2) is provided with one and reverses application of force groove (231); Vertical component effect (12) outside of L shaped anchor clamps (1) also is provided with one and shears application of force groove (121), and the groove (121) on the L shaped anchor clamps (1) and groove (211) line of centres on the N clevis tool (2) are on opposite face (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201543749U CN201301456Y (en) | 2008-10-23 | 2008-10-23 | Rotation prevention clamp for testing contact mechanics characteristic of cementation granules |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201543749U CN201301456Y (en) | 2008-10-23 | 2008-10-23 | Rotation prevention clamp for testing contact mechanics characteristic of cementation granules |
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| Publication Number | Publication Date |
|---|---|
| CN201301456Y true CN201301456Y (en) | 2009-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008201543749U Expired - Fee Related CN201301456Y (en) | 2008-10-23 | 2008-10-23 | Rotation prevention clamp for testing contact mechanics characteristic of cementation granules |
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| CN (1) | CN201301456Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393093B (en) * | 2007-09-19 | 2011-04-06 | 同济大学 | Cementing granule contact anti-shearing and torsion resistant test device |
| CN106814031A (en) * | 2017-01-18 | 2017-06-09 | 浙江科技学院（浙江中德科技促进中心） | The cementing shearing of sand particle nanogel and bending strength test device and its method |
-
2008
- 2008-10-23 CN CNU2008201543749U patent/CN201301456Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393093B (en) * | 2007-09-19 | 2011-04-06 | 同济大学 | Cementing granule contact anti-shearing and torsion resistant test device |
| CN106814031A (en) * | 2017-01-18 | 2017-06-09 | 浙江科技学院（浙江中德科技促进中心） | The cementing shearing of sand particle nanogel and bending strength test device and its method |
| CN106814031B (en) * | 2017-01-18 | 2019-03-19 | 浙江科技学院（浙江中德科技促进中心） | The cementing shearing of sand particle nanogel and bending strength test device and its method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090902 Termination date: 20131023 |