CN204269475U - Tensile Strength of Frozen Soil proving installation - Google Patents
Tensile Strength of Frozen Soil proving installation Download PDFInfo
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- CN204269475U CN204269475U CN201420725466.3U CN201420725466U CN204269475U CN 204269475 U CN204269475 U CN 204269475U CN 201420725466 U CN201420725466 U CN 201420725466U CN 204269475 U CN204269475 U CN 204269475U
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- supporting rod
- vertical supporting
- horizontal
- tensile strength
- frozen soil
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Abstract
The utility model belongs to materials mechanics experimental detection technique field, relates to Tensile Strength of Frozen Soil test unit, particularly relates to a kind of Tensile Strength of Frozen Soil proving installation.Agent structure is made up of test stand, temperature regulating device, charger, horizontal and vertical displacement measuring device and data collection and analysis device.Top board and lower platen are symmetrical structure, and tested sample is more leveled off to heart radial direction destruction under concentrated force effect.Vertical supporting rod can keep the contact good with sample, improves the accuracy of experimental result.Test unit accurately can test frozen soil test specimen under condition of different temperatures, from be loaded into sample and destroy vertical, the horizontal distortion amount of whole process and the load of correspondence.One-piece construction of the present utility model is simple, and use flexible operation, measuring accuracy is good, and experimental enviroment is friendly.
Description
Technical field
The utility model belongs to materials mechanics experimental detection technique field, relates to Tensile Strength of Frozen Soil test unit, particularly relates to a kind of Tensile Strength of Frozen Soil proving installation.
Background technology
Tensile strength is one of important indicator of Geotechnical materials strength characteristics, is also its most weak strength characteristics.In recent years, along with the fast development of national economy, during various infrastructure construction is being planned or is being built.In engineering construction, often can relate to and freeze earthen materia, its tensile strength mechanical performance index is design, checks, controls and pass judgment on the important evidence of quality.Along with the development of subway construction, construction freezing method has had tremendous development in soft clay area.In addition, freezing sinking shaft technology is also widely used in coal mining industry.In the design studying the reasons of crack emergence and fracture processing scheme, tensile strength is directly connected to the design and construction of material and building structure, therefore, just seems more and more seem important to the correct understanding of the tensile characteristics of frozen soil.
Measure Tensile strength test method to have a lot, be broadly divided into uniaxial direct tensile method and the large class of indirect method two.Direct tensile test is owing to being subject to the restrictions such as the processing difficulties of clamping condition, test specimen, more difficult realization.Indirect measurement method avoids a difficult problem for test specimen processing and uniaxial direct tensile grasping system, and test findings is comparatively stable.Therefore, the tensile strength of ground class generally adopts indirect pulling method to measure.Although the existing Experimental Standardization regulations stipulate test method of Rock And Soil tensile strength, but test unit is not described, causes and be difficult to obtain test findings accurately.
Existing Indirect Tensile Tests device has obviously shortcoming:
1, existing test unit can only carry out the tension test under specified conditions, and filler strip width should be determined according to the intensity of sample.
2, specify according to existing testing regulations, when measuring Tensile strength, do not need the horizontal distortion considering test specimen, therefore, only just the tensile property of material is evaluated from vertical deformation, seem that some is unilateral.
3, existing test unit can only carry out the test under normal temperature, can not carry out the strength test under low temperature, subzero temperature condition, can not meet the requirement of frozen soil experiment.
Utility model content
For the shortcoming that existing tensile strength measuring technology exists, seek to design a kind of strong adaptability of preparation, Tensile Strength of Frozen Soil test unit that order of accuarcy is high is necessary.The purpose of this utility model is to provide a kind of Tensile Strength of Frozen Soil proving installation, accurately testing frozen soil sample from being loaded into the load and vertical, horizontal distortion amount that destroy overall process, also can meet the diversified demand of different materials sample, improving testing efficiency.
Technical scheme of the present invention is:
A kind of Tensile Strength of Frozen Soil proving installation, be by loading guide pole, top board, upper mounting plate press strip, sample, securing member, bolt, lower platform press strip, lower platen, guide pole, horizontal displacement meter, horizontal displacement meter top board, horizontally-guided bar, horizontal support I, horizontal shift measurement bay base, bolt sliding guide groove, contact circular cone, level to web member, horizontally-guided bar, the first vertical supporting rod, pulley, the second vertical supporting rod and
Horizontal support II forms.
Described lower platen is provided with and loads guide pole and base plate bolt sliding guide groove; Lower platform press strip is secured by bolts in lower platen; Top board is provided with pilot hole; Upper mounting plate press strip is secured by bolts in top board; Horizontal shift measurement bay base is provided with guide pole; Guide pole is provided with level to web member; Level connects horizontal support I and horizontal support II respectively to web member two ends; Horizontally-guided bar is placed on horizontal support I; Horizontal displacement meter is placed on horizontal support II; One end of horizontally-guided bar is provided with horizontal displacement meter top board, and the other end connects the first vertical supporting rod by securing member; Second vertical supporting rod connects horizontal displacement meter by horizontally-guided bar; Horizontal displacement meter and horizontal displacement meter top plate contact.
Above-mentioned loading guide pole is through the pilot hole on top board.
Above-mentioned top board moves up and down along loading guide pole.
Pulley is provided with between above-mentioned horizontally-guided bar and horizontal support I; Pulley is provided with between horizontal displacement meter and horizontal support II; First vertical supporting rod and second is vertically provided with pulley between supporting rod and lower platen.
The side of above-mentioned lower platen is provided with scale.
Above-mentioned first vertical supporting rod is through the first contact circular cone, and the first contact circular cone slides along the first vertical supporting rod; Second vertical supporting rod is through the second contact circular cone, and the second contact circular cone slides along the second vertical supporting rod.
Horizontally-guided bar, horizontally-guided bar control at same level height to web member by the horizontal support I at two ends and horizontal support II by above-mentioned level, can the horizontal shift of Measurement accuracy tested sample.
Advantage of the present utility model and beneficial effect are:
1, the utility model is provided with 4 bolt sliding guide grooves on lower platen plate, in this guide groove, Matching installation has location screwing bolts, can described test fixture be fixed on pressure testing machine, in addition, base plate is provided with scale mark, facilitates sample centering to place, can avoid losing time because of centering Adjustment Tests device repeatedly, this is particularly important to the test of the strict frozen soil test specimen of temperature requirement, can ensure that the accuracy of test findings.
2, the utility model measures test piece deformation by horizontal displacement meter, especially testing level distortion, can avoid pasting the complex operation that foil gauge method is brought, the shortcoming that cost is higher because adopting, slidably conical structure is adopted to contact with test specimen, ensure that in whole process of the test, regardless of the horizontal distortion tested, vertical supporting rod all can keep good contact with test specimen, has ensured the accuracy of horizontal distortion test result.
3, horizontal direction fixed support of the present utility model all there is pulley, the friction between fixed support and horizontally-guided bar can be reduced, reduce the restriction to test piece deformation, ensure the accuracy of test result.
4, the utility model can according to test specimen size, and the height of adjustment horizontal shift measurement mechanism, guarantees that vertical supporting rod can contact well with test specimen, in addition, also vertical supporting rod be can ensure all the time in same direction clamping test pieces, horizontal distortion test result, especially cylinder specimen accurately obtained.
5, upper and lower press strip of the present utility model all has certain width, for the sample that intensity is lower, sample inside can not can be embedded as steel wire, test is caused to complete, in addition, upper and lower press strip is bolted, and therefore, can need to select the press strip of different model to test according to test.
6, the utility model is on the basis of existing experimental facilities (pressure testing machine, temperature-controlled box), can realize the tensile strength test of frozen soil, need not purchase corresponding equipment separately again, avoid the overlapping investment of resource by this device.
Accompanying drawing explanation
Fig. 1 is front view of the present utility model.
Fig. 2 is side view of the present utility model.
Fig. 3 is vertical view of the present utility model.
Embodiment
For understanding the utility model better, be further described by following instance, but not to restriction of the present utility model.
As shown in Figure 1, 2, 3, a kind of Tensile Strength of Frozen Soil proving installation, by loading guide pole 2, top board 3, upper mounting plate press strip 4, sample 5, securing member 6, bolt 7, lower platform press strip 8, lower platen 9, guide pole 10, horizontal displacement meter 11, horizontal displacement meter top board 12, horizontally-guided bar 13, transverse direction
Frame I 14, horizontal shift measurement bay base 15, bolt sliding guide groove 16, first contact circular cone 17, level are to web member 18, the vertical supporting rod 20 of horizontally-guided bar 19, first, the vertical supporting rod 22 of pulley 21, second and horizontal support II 23 composition, and lower platen 9 is provided with and loads guide pole 2 and base plate bolt sliding guide groove 16; Lower platform press strip 8 is fixed on lower platen 9 by bolt 7; Top board 3 is provided with pilot hole; Upper mounting plate press strip 4 is fixed on top board 3 by bolt 7; Horizontal shift measurement bay base 15 is provided with guide pole 10; Guide pole 10 is provided with level to web member 18; Level connects horizontal support I 14 and horizontal support II 23 respectively to web member 18 two ends; Horizontally-guided bar 19 is placed on horizontal support I 14; Horizontal displacement meter 11 is placed on horizontal support II 23; One end of horizontally-guided bar 19 is provided with horizontal displacement meter top board 12, and the other end connects the first vertical supporting rod 20 by securing member 6; Second vertical supporting rod 22 connects horizontal displacement meter 11 by horizontally-guided bar 13; Horizontal displacement meter 11 contacts with horizontal displacement meter top board 12.
Load guide pole 2 through the pilot hole on top board 3; Top board 3 moves up and down along loading guide pole 2; Pulley 21 is provided with between horizontally-guided bar 19 and horizontal support I 14; Pulley 21 is provided with between horizontal displacement meter 11 and horizontal support II 23; First vertical supporting rod 20 and second is vertically provided with pulley 21 between supporting rod 22 and lower platen 9; The side of lower platen 9 is provided with scale 24; First vertical supporting rod 20 contacts circular cone 17 through the first contact circular cone 17, first and slides along the first vertical supporting rod 20; Second vertical supporting rod 22 contacts circular cone 17 ' through the second contact circular cone 17 ', the second and slides along the second vertical supporting rod 22; Horizontally-guided bar 13, horizontally-guided bar 19 control at same level height to web member 18 by the horizontal support I 14 at two ends and horizontal support II 23 by level, can the horizontal shift of Measurement accuracy tested sample.
Embodiment
Lower platen 9 is provided with 4 bolt sliding guide grooves 16, and be furnished with 4 location screwing bolts, can according to the workbench size of pressure testing machine, the position of screwing bolts in bolt sliding guide groove 16, adjustment location, is anchored on lower platen 9 on pressure testing machine.
Again tested sample is placed in upper mounting plate press strip 4 middle with lower platform press strip 8, then by first vertical supporting rod 20 supporting rod vertical with second 22 points of both sides near tested sample 5, by the scale 24 of lower platen 9 side, check the position bottom the first vertical supporting rod 20 supporting rod 22 vertical with second, the position of adjustment tested sample 5, is located at lower platen 9 and hits exactly.
Pressure is reached top board 3 by the spherical indenter 1 of pressure testing machine, top board 3 moves down along loading guide pole 2, upper mounting plate press strip 4 on top board 3 touches tested sample 5, and tested sample 5 produces under upper mounting plate press strip 4 with the pressure effect of lower platform press strip 8 is out of shape.When tested sample 5 produces lateral deformation, the first vertical supporting rod 20 contacts circular cone 17 can lose contact because of lateral deformation, thus freely glides; First contact circular cone 17 contacts with tested sample 5 again, and in like manner, the second contact circular cone 17 ' on the second vertical supporting rod 22 can lose contact because of lateral deformation, thus freely glides, and the second contact circular cone 17 ' contacts with tested sample again; Ensure that in whole process of the test, the first vertical supporting rod 20 can carry out good contacting with tested sample 5 with the second vertical supporting rod 22, can ensure the accuracy of test result.
Tested sample produces lateral deformation, and the first vertical supporting rod 20 supporting rod 22 vertical with second promoting sample both sides does horizontal relative motions, the vertical supporting rod 22 of first vertical supporting rod 20, second makes horizontal displacement meter top board 12 and horizontally-guided bar 13 do relative motion by the transmission of each element, makes horizontal displacement meter 11 record the horizontal distortion amount of tested sample 5.
The vertical displacement meter that perpendicular displacement and the pressure of exerting pressure are carried by pressure testing machine and pressure transducer are measured.
Described pressure transducer, signal wire that is vertical, horizontal displacement meter 11 are connected with computer input end by A/D converter, data in data collection and transmission energy real time record process of the test, and analyzing and processing can be carried out to test findings, provide corresponding test findings.
When carrying out the test of the sample tensile strength under cryogenic conditions, needing tested sample and this device to put into temperature-controlled box, by regulating temperature-controlled box temperature, carrying out the Tensile strength test under different temperatures.
Claims (7)
1. a Tensile Strength of Frozen Soil proving installation, by loading guide pole (2), top board (3), upper mounting plate press strip (4), sample (5), securing member (6), bolt (7), lower platform press strip (8), lower platen (9), guide pole (10), horizontal displacement meter (11), horizontal displacement meter top board (12), horizontally-guided bar (13), horizontal support I (14), horizontal shift measurement bay base (15), bolt sliding guide groove (16), first contact circular cone (17), level is to web member (18), horizontally-guided bar (19), first vertical supporting rod (20), pulley (21), second vertical supporting rod (22) and horizontal support II (23) form, it is characterized in that:
Described lower platen (9) is provided with and loads guide pole (2) and base plate bolt sliding guide groove (16); Lower platform press strip (8) is fixed on lower platen (9) by bolt (7); Top board (3) is provided with pilot hole; Upper mounting plate press strip (4) is fixed on top board (3) by bolt (7); Horizontal shift measurement bay base (15) is provided with guide pole (10); Guide pole (10) is provided with level to web member (18); Level connects horizontal support I (14) and horizontal support II (23) respectively to web member (18) two ends; Horizontally-guided bar (19) is placed on horizontal support I (14); Horizontal displacement meter (11) is placed on horizontal support II (23); One end of horizontally-guided bar (19) is provided with horizontal displacement meter top board (12), and the other end connects the first vertical supporting rod (20) by securing member (6); Second vertical supporting rod (22) connects horizontal displacement meter (11) by horizontally-guided bar (13); Horizontal displacement meter (11) contacts with horizontal displacement meter top board (12).
2. Tensile Strength of Frozen Soil proving installation according to claim 1, is characterized in that: described loading guide pole (2) is through the pilot hole on top board (3).
3. Tensile Strength of Frozen Soil proving installation according to claim 1 and 2, is characterized in that: described top board (3) moves up and down along loading guide pole (2).
4. Tensile Strength of Frozen Soil proving installation according to claim 1, is characterized in that: be provided with pulley (21) between described horizontally-guided bar (19) and horizontal support I (14); Pulley (21) is provided with between horizontal displacement meter (11) and horizontal support II (23); First vertical supporting rod (20) and be provided with pulley (21) between the second vertical supporting rod (22) and lower platen (9).
5. Tensile Strength of Frozen Soil proving installation according to claim 1, is characterized in that: the side of described lower platen (9) is provided with scale (24).
6. Tensile Strength of Frozen Soil proving installation according to claim 1, is characterized in that: the described first vertical supporting rod (20) is through the first contact circular cone (17), and the first contact circular cone (17) is slided along the first vertical supporting rod (20); Second vertical supporting rod (22) is through the second contact circular cone (17 '), and the second contact circular cone (17 ') is slided along the second vertical supporting rod (22).
7. Tensile Strength of Frozen Soil proving installation according to claim 1, it is characterized in that: horizontally-guided bar (13), horizontally-guided bar (19) control at same level height to web member (18) by the horizontal support I (14) at two ends and horizontal support II (23) by described level, can the horizontal shift of Measurement accuracy tested sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420725466.3U CN204269475U (en) | 2014-11-28 | 2014-11-28 | Tensile Strength of Frozen Soil proving installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420725466.3U CN204269475U (en) | 2014-11-28 | 2014-11-28 | Tensile Strength of Frozen Soil proving installation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204269475U true CN204269475U (en) | 2015-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420725466.3U Expired - Fee Related CN204269475U (en) | 2014-11-28 | 2014-11-28 | Tensile Strength of Frozen Soil proving installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204269475U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644762A (en) * | 2016-12-23 | 2017-05-10 | 大连理工大学 | Double-sided direct shear test device for fiber concrete |
| CN109490092A (en) * | 2018-12-20 | 2019-03-19 | 四川正升环保科技有限公司 | A kind of sxemiquantitative unconfined compressive strength tester |
| CN110274830A (en) * | 2019-04-18 | 2019-09-24 | 防灾科技学院 | A kind of drift-sand Modified soil tensile characteristics test macro |
| CN110455640A (en) * | 2019-08-14 | 2019-11-15 | 北京建筑大学 | Tensile Strength of Frozen Soil test macro and test method |
-
2014
- 2014-11-28 CN CN201420725466.3U patent/CN204269475U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644762A (en) * | 2016-12-23 | 2017-05-10 | 大连理工大学 | Double-sided direct shear test device for fiber concrete |
| CN109490092A (en) * | 2018-12-20 | 2019-03-19 | 四川正升环保科技有限公司 | A kind of sxemiquantitative unconfined compressive strength tester |
| CN110274830A (en) * | 2019-04-18 | 2019-09-24 | 防灾科技学院 | A kind of drift-sand Modified soil tensile characteristics test macro |
| CN110455640A (en) * | 2019-08-14 | 2019-11-15 | 北京建筑大学 | Tensile Strength of Frozen Soil test macro and test method |
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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 |
Granted publication date: 20150415 Termination date: 20151128 |