CN204831909U - A geonet clamping device for staight scissors experiment - Google Patents
A geonet clamping device for staight scissors experiment Download PDFInfo
- Publication number
- CN204831909U CN204831909U CN201520610455.5U CN201520610455U CN204831909U CN 204831909 U CN204831909 U CN 204831909U CN 201520610455 U CN201520610455 U CN 201520610455U CN 204831909 U CN204831909 U CN 204831909U
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- China
- Prior art keywords
- geonet
- clamping device
- steel plate
- establishes
- steel sheet
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Clamps And Clips (AREA)
Abstract
Influence the problem of test result because the geonet sample is not hard up in order to solve when carrying out direct shear test, the utility model provides a geonet clamping device for staight scissors experiment adopts following technical scheme: a geonet clamping device for staight scissors experiment, includes the steel sheet, and convex cylinder is established to the steel sheet bottom, and the cylinder card is in shear box down, and the top of steel sheet is equipped with along two slots of shearing direction, establishes the steel ball on the slot, geonet tiling is at the steel sheet top, and geonet buckles downwards, and the one end that the geonet right -hand member is buckled is downwards upwards buckled again, establishes long and thin iron set in the department of buckling, and geonet establishes in the upper right corner the fixed clamp plate in right angle, establishes the bolt on the fixed clamp plate in right angle, and steel sheet and shear box down correspond establishes the screw, clamp plate, clamp plate and lower shear box bolted connection are established to the position that the geonet left end is buckled downwards. Geonet is fixed completely at the both ends quilt of cuting the direction, makes geonet difficult not hard up, and it influences the problem of test result to have solved because the geonet sample becomes flexible.
Description
Technical field
The utility model relates to and belongs to Geotechnical Engineering soil test technique field, is specifically related to a kind of geonet clamping device for direct shearing test.
Background technology
The demand of fast development to refuse landfill of economic society constantly increases, and present landfill yard is that occupation of land scale or landfill height all increase sharply, and brings hidden danger to the stable of composite pad system of refuse landfill.The stability of liner system has the shearing strength between each liner interface to determine, but due to the difference of mechanical property between various gasket material, make landfill yard easily along bottom liner interface, sliding failure occur.In liner, geonet or the boundary strength between composite earthwork drainage network and other gasket materials are the key factors determining liner system safety.
Direct shearing test is the most frequently used test method measuring boundary strength in shop experiment, direct shear test is mainly used for studying the intensity between geosynthetics, but the problem due to fixed form may cause loosening of geonet sample, thus the boundary strength obtained can not reflect actual state completely.Therefore, need to find one and can ensure that geonet is completely fixed in shear history, and meet the fixed form of geonet actual forced status in liner system, thus obtain the boundary strength parameter closer to reality, for liner system stability analysis provides foundation.
Utility model content
Affect the problem of test findings when carrying out indoor direct shear test because geonet sample loosens in order to solve, the utility model provides a kind of geonet clamping device for direct shearing test.
The utility model adopts following technical scheme: a kind of geonet clamping device for direct shearing test, comprise steel plate 1, the right cylinder 2 of protrusion is provided with bottom described steel plate 1, right cylinder 2 is stuck in the hole 4 in the middle part of down cut box 3, four sides of steel plate 1 respectively with four sides of down cut box 3 at grade, the top of steel plate 1 is provided with two grooves 5 of shear direction, and groove 5 is provided with some steel balls 6; Geonet 7 is laid in steel plate 1 top, the part that geonet about 7 end exceedes steel plate 1 bends downwards, one end that geonet 7 right-hand member bends downwards upwards bends again, an elongated iron 8 is set in bending place, geonet 7 upper right corner arranges right angle fixation clip 9, right angle fixation clip 9 top and side arrange two bolts 10 respectively, and the position of steel plate 1 and down cut box 3 correspondence arranges two screws 11 respectively; The position that geonet 7 left end bends downwards arranges pressing plate 12, and pressing plate 12 is rectangular parallelepiped, and pressing plate 12 is connected with down cut box 3 bolt.
Preferably, the dark 4mm of described groove 5, described steel ball 6 diameter is 10mm, and the steel ball quantity on two grooves is 4.
Preferably, described steel plate 1 and right angle fixation clip 9 material are that carbon content is high and the steel that hardness is large, ensure to be out of shape in a compressed state as far as possible little.
Preferably, described right angle fixation clip 9 and pressing plate and geonet 7 surface in contact are zigzag, increase the friction force between itself and geonet, make the clamping of geonet more firm.
Preferably, be wiped with lubricating oil in two grooves 5, make it more lubricate, be conducive to the slip of steel ball.
The beneficial effects of the utility model are: geonet is completely fixed at the two ends of shear direction, and geonet is not easily loosened, identical with the stress of geonet in Practical Project, solve because geonet sample loosens and affect the problem of test findings; In steel plate groove, add steel ball, can ensure that on shear box, dish is contacted by steel ball with the contact of fixing geonet steel plate, between them, friction becomes rolling friction like this, makes the stress of geonet in experimentation similar to the stress in Practical Project; Elongate rectangular iron is stuck in geonet bending place and pressing plate plays fixation jointly, ensures that geonet can not be drawn out under high-stress state, avoids occurring that force phenomenon is unloaded on border.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is further described:
Fig. 1 is the vertical view of steel plate;
Fig. 2 is the left view of steel plate;
Fig. 3 is the schematic diagram of down cut box;
Fig. 4 is the partial enlarged drawing in the geonet upper right corner;
Fig. 5 is that geonet is fixed on the front view of down cut box by clamping device;
Fig. 6 is that geonet is fixed on the vertical view of down cut box by clamping device;
Fig. 7 is the schematic diagram of direct shear apparatus.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described:
A kind of geonet clamping device for direct shearing test, comprise steel plate, the right cylinder of protrusion is provided with bottom described steel plate, right cylinder is stuck in the hole in the middle part of down cut box, four sides of steel plate respectively with four sides of down cut box at grade, the top of steel plate is provided with two grooves of shear direction, and each groove is provided with some steel balls; Geonet is laid in steel plate top, the part exceeding steel plate is held to bend about geonet downwards, one end that geonet right-hand member bends downwards upwards bends again, an elongated iron is set in bending place, the geonet upper right corner arranges right angle fixation clip, fixation clip top and side arrange two bolts respectively, and steel plate and position corresponding to down cut box arrange two screws respectively; The position that geonet left end bends downwards arranges pressing plate, pressing plate is rectangular parallelepiped, and pressing plate is connected with down cut box bolt, described ditch groove depth 4mm, described diameter of the steel ball is 10mm, steel ball quantity on each groove is 4, it is characterized in that, described steel plate and fixation clip material are that carbon content is high and the steel that hardness is large, it is characterized in that, described fixation clip and pressing plate and geonet surface in contact are zigzag, it is characterized in that, are wiped with lubricating oil in two grooves.
Claims (5)
1. the geonet clamping device for direct shearing test, it is characterized in that, comprise steel plate, the right cylinder of protrusion is provided with bottom described steel plate, described right cylinder is stuck in the hole in the middle part of down cut box, four sides of described steel plate respectively with four sides of down cut box at grade, the top of described steel plate is provided with two grooves of shear direction, and groove is provided with some steel balls; Geonet is laid in steel plate top, the part exceeding steel plate is held to bend about geonet downwards, one end that geonet right-hand member bends downwards upwards bends again, an elongated iron is set in bending place, the geonet upper right corner arranges right angle fixation clip, fixation clip top and side arrange two bolts respectively, and steel plate and position corresponding to down cut box arrange two screws respectively; The position that geonet left end bends downwards arranges pressing plate, and pressing plate is rectangular parallelepiped, and pressing plate is connected with down cut box bolt.
2. a kind of geonet clamping device for direct shearing test according to claim 1, it is characterized in that, described ditch groove depth 4mm, described diameter of the steel ball is 10mm, and the steel ball quantity on each groove is 4.
3. a kind of geonet clamping device for direct shearing test according to claim 1, is characterized in that, described steel plate and fixation clip material are that carbon content is high and the steel that hardness is large.
4. a kind of geonet clamping device for direct shearing test according to claim 1, is characterized in that, described fixation clip and pressing plate and geonet surface in contact are zigzag.
5. a kind of geonet clamping device for direct shearing test according to claim 1, is characterized in that, be wiped with lubricating oil in two grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520610455.5U CN204831909U (en) | 2015-08-14 | 2015-08-14 | A geonet clamping device for staight scissors experiment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520610455.5U CN204831909U (en) | 2015-08-14 | 2015-08-14 | A geonet clamping device for staight scissors experiment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204831909U true CN204831909U (en) | 2015-12-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520610455.5U Expired - Fee Related CN204831909U (en) | 2015-08-14 | 2015-08-14 | A geonet clamping device for staight scissors experiment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204831909U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037007A (en) * | 2017-12-25 | 2018-05-15 | 同济大学 | A kind of material grasping teeth board fixer for the experiment of geosynthetics interface shearing |
| CN111766132A (en) * | 2020-07-15 | 2020-10-13 | 华北水利水电大学 | Metal mesh tensile quality detection device and operation method thereof |
-
2015
- 2015-08-14 CN CN201520610455.5U patent/CN204831909U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037007A (en) * | 2017-12-25 | 2018-05-15 | 同济大学 | A kind of material grasping teeth board fixer for the experiment of geosynthetics interface shearing |
| CN111766132A (en) * | 2020-07-15 | 2020-10-13 | 华北水利水电大学 | Metal mesh tensile quality detection device and operation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20151202 Termination date: 20180814 |