CN202403981U - Creep deformation testing device - Google Patents
Creep deformation testing device Download PDFInfo
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- CN202403981U CN202403981U CN2011205157468U CN201120515746U CN202403981U CN 202403981 U CN202403981 U CN 202403981U CN 2011205157468 U CN2011205157468 U CN 2011205157468U CN 201120515746 U CN201120515746 U CN 201120515746U CN 202403981 U CN202403981 U CN 202403981U
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- pallet
- creep
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Abstract
The utility model discloses a creep deformation testing device, which comprises a testing bed. A fixing system for fixing a testing sample is arranged on the lower side of the top of the testing bed, a vernier caliper with a watch is arranged on the fixing system, and a loading device is connected with a lower portion of the fixing system. The creep deformation testing device is simple to operate, easy to achieve and low in cost, keeps constant pressure by controlling weights weight, guarantees progress of displacement measurement by using the vernier caliper with the watch, and has the advantages of being visual, simple, easy to maintain and the like.
Description
Technical field
The utility model relates to a kind of test unit, especially a kind of creep proving installation that is used for the geo-grid material performance test.
Background technology
Creep is meant that solid material is keeping under the constant condition of stress, and strain prolongs and ever-increasing phenomenon in time.Plastic yield just occurs after stress surpasses limit of elasticity usually, and that creep needs only the action time of stress is quite long, and it also can occur during less than limit of elasticity at stress.Along with the continuous development of geosynthetics, the increasingly extensive permanent work that is applied to of GSZ.GSZ in the civil engineering is owing to receive the effect of load for a long time, with producing bigger deformation, the reinforcement function of geotextile is weakened greatly and causes the buildings forfeiture stable.Therefore, under action of long-term load, bring into play its function in order to make GSZ, must their creep properties of research.In actual engineering, the soil body that adds GSZ receives the structure long-term load action, thereby must study its deformation characteristic under action of long-term load, so that predict its permanent strain, guarantees the safe operation and the construction of structure.
At present; The creep proving installation that domestic each research institute of big colleges and universities adopts all be difficult to keep constant pressure or in pressure maintaining period pressure surge too big, and precision is not high aspect the measurement of stretching displacement, in addition; Because creep test is consuming time longer, causes bigger manpower and energy dissipation easily.
The utility model content
The purpose of the utility model is for overcoming the deficiency of above-mentioned prior art; A kind of creep proving installation is provided; It is simple to operate, be easy to realize, with low cost; Utilize control counterweight weight to keep constant voltage, guarantee the progress of displacement measurement, have advantages such as directly perceived, simple and easy, easy care with band table vernier caliper.
For realizing above-mentioned purpose, the utility model adopts following technical proposals:
A kind of creep proving installation comprises test-bed, and said test-bed top downside is provided with the fixed system of fixing test sample, and fixed system is provided with band table vernier caliper, and the fixed system bottom is connected with charger.
Said test-bed adopts four foot rest structures, has crossbeam to connect between four legs.
Said fixed system comprises two groups two the relative last lower clamps that connect through some screws that are provided with up and down; On the corresponding surface that two are gone up lower clamp relatively; One of them corresponding surface is provided with some convexities, and another corresponding surface is provided with and protruding corresponding groove.
Two measuring jaws of said band table vernier caliper place respectively on the surface of two groups of anchor clamps up and down, and two measuring jaws are waled by a bungee.
Said charger comprises the pallet that links to each other with those group anchor clamps that are arranged at the bottom, and the pallet upper end is provided with hook, and pallet is hooked on the lower clamp of those group anchor clamps of bottom through hook, and counterweight is set on the pallet.
The creep method of testing of the utility model is following, and 1) produce the GSZ test sample according to designing requirement; 2) the GSZ test sample of step 1) being produced is fixed on two groups of anchor clamps through the screw on the anchor clamps, keeps the fixed system level, and makes anchor clamps vertical with GSZ; 3) band is shown two groups of chucking surfaces up and down that the vernier caliper measuring jaw places fixed system, the bungee of waling two measuring jaws makes combines closely between measuring jaw and the anchor clamps, and the initial length of record sample, the initial reading of vernier caliper; 4) below place the counterweight that satisfies testing requirements quantity on the pallet of that group anchor clamps bottom, and change pulling force through changing counterweight quantity according to test needs, treat that total system is stable after, begin to count; 5), obtain the elongation of GSZ test sample according to testing requirements time recording vernier caliper reading; 6) calculate strain according to the cross-sectional area of elongation and grid material, at last experimental data is carried out analyzing and processing, draw the creep Changing Pattern.
The utility model is high 1.1 meters, 0.5 square metre of floor area.Test-bed adopts four foot rests, has crossbeam to connect between four legs, has guaranteed its intensity and stability; Fixed system comprises two groups of anchor clamps, and every group of anchor clamps are divided into two parts up and down, and convexity on two parts and groove are interlocked up and down; Increased contact area with test material; By three screws with the GSZ test sample with anchor clamps driving fit be in the same place, guaranteed the changing of the relative positions can not take place between anchor clamps and the material, guaranteed test accuracy.Those group anchor clamps of below link to each other with the pallet that adds counterweight, control constant pulling force through the counterweight quantity on the adjustment pallet, and load is stable, and it is less to fluctuate, and satisfies the creep test requirement.A fixed system and a band table vernier caliper (being accurate to 0.01mm) combine; Two measuring jaws of trip band table mark slide calliper rule place fixed system both sides up and down respectively; Band table vernier caliper is owing to vertically place, and measuring jaw comes off easily, is waled by a bungee; Prevent that measuring jaw from coming off, guaranteed that measuring jaw and stationary installation combine closely.Band table vernier caliper has guaranteed the precision of GSZ elongation.
During application, every bench teat is tested on the stand can be set up in parallel a plurality of fixed systems and charger, and can be used for test experiments simultaneously, raises the efficiency.The utility model is simple to operate, be easy to realize, with low cost, utilize control counterweight weight to keep constant voltage, guarantee the progress of displacement measurement with band table vernier caliper, have advantages such as directly perceived, simple and easy, easy care.
The beneficial effect of the utility model is,
1, the utility model is applicable to the geo-grid material that intensity is very high;
2, the utility model adopts band table vernier caliper measurement elongation, and precision is higher;
3, fixed system is prone to levelling, and it is better to cut the anchor clamps driving fit, combines closely with the test GSZ;
4, change load through counterweight, stable, energy-conservation, environmental protection;
5, the utility model principle of work is simple, easy to operate, and measuring method is various, reliable test result, and versatility is stronger, and is cheap.
Description of drawings
Fig. 1 is the described creep proving installation of a utility model synoptic diagram;
Fig. 2 is the synoptic diagram of the utility model clamp structure;
Fig. 3 is the uniaxial tension creep curve figure of GSZ under different loading environments of different size;
Fig. 4 is the uniaxial tensile strain of GSZ under the different loading environments variation diagram in time of different size;
Wherein, 1. four foot rests, 2. band table vernier caliper, 3. counterweight, 4. fixed system, 5. pallet (containing hook), 6. GSZ test sample, 7. screw, 8. bungee, 9. anchor clamps, 10. anchor clamps, 12. lower clamps on the measuring jaw, 11..
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Like Fig. 1, shown in 2, a kind of creep proving installation comprises the test-bed of four foot rests, 1 structure, has crossbeam to connect between four legs of four foot rests 1.Test-bed top downside is provided with the fixedly fixed system 4 of GSZ test sample 6, and fixed system 4 is provided with band table vernier caliper 2, and fixed system 4 bottoms are connected with charger.Fixed system 4 comprises two groups two the relative last lower clamps 11,12 that connect through screw 7 that are provided with up and down; On the corresponding surface of two relative last lower clamps; The lower surface of wherein going up anchor clamps 11 is provided with two convexities, and the upper surface of lower clamp 12 is provided with and protruding corresponding two grooves.
Two measuring jaws 10 of band table vernier caliper 2 place respectively on the surface of two groups of anchor clamps up and down, and two measuring jaws 10 are waled by a bungee 8.Charger comprises the pallet 5 that links to each other with the lower clamp of those group anchor clamps of bottom, and pallet 5 upper ends are provided with hook, and pallet 5 is hooked on the lower clamp of those group anchor clamps of bottom through hook, on the pallet 5 counterweight is set.
The croop property method of testing of geotechnique's sound of laughing grid is produced GSZ test sample 6 according to designing requirement earlier; Screw 7 on the GSZ test sample 6 usefulness proving installations is fixed on two groups of anchor clamps 9, keeps fixed system 4 levels, and make anchor clamps 9 vertical with GSZ test sample 6; Band is shown two chucking surfaces up and down that 2 two measuring jaws 10 of vernier caliper place fixed system, and the bungee 8 of waling two measuring jaws makes combines closely between measuring jaw 10 and the anchor clamps 9; Below place the counterweight 3 that satisfies testing requirements quantity on the pallet 5 of that group anchor clamps bottom, and change pulling force through changing counterweight 3 quantity according to test needs, treat that total system is stable after, begin to count; According to testing requirements time recording band table vernier caliper 2 readings, obtain the elongation of GSZ test sample 6, calculate strain according to the cross-sectional area of elongation and grid material; At last experimental data is carried out analyzing and processing, draw the creep Changing Pattern.
Adopt the utility model a kind of geo-grid material to be carried out the hierarchical loading creep test of many group leaders time; Obtained the uniaxial tension creep curve (Fig. 3) of GSZ under different loading environments of different size; It is very fast to find out that by Fig. 3 the GSZ elongation increased at the loading initial stage; Increase in time, elongation tends towards stability, and shows the tangible deceleration creep stage at last.At last obtain its strain variation rule according to the cross-sectional area of geo-grid material again, as shown in Figure 4.
Though the above-mentioned accompanying drawing that combines is described the embodiment of the utility model; But be not restriction to the utility model protection domain; One of ordinary skill in the art should be understood that; On the basis of the technical scheme of the utility model, those skilled in the art need not pay various modifications that creative work can make or distortion still in the protection domain of the utility model.
Claims (5)
1. a creep proving installation is characterized in that, comprises test-bed, and said test-bed top downside is provided with the fixed system of fixing test sample, and fixed system is provided with band table vernier caliper, and the fixed system bottom is connected with charger.
2. creep proving installation as claimed in claim 1 is characterized in that said test-bed adopts four foot rest structures, has crossbeam to connect between four legs.
3. creep proving installation as claimed in claim 1; It is characterized in that; Said fixed system comprises two groups two the relative last lower clamps that connect through some screws that are provided with up and down; On the corresponding surface that two are gone up lower clamp relatively, one of them corresponding surface is provided with some convexities, and another corresponding surface is provided with and protruding corresponding groove.
4. creep proving installation as claimed in claim 3 is characterized in that, two measuring jaws of said band table vernier caliper place respectively on the surface of two groups of anchor clamps up and down, and two measuring jaws are waled by a bungee.
5. creep proving installation as claimed in claim 4; It is characterized in that said charger comprises the pallet that links to each other with those group anchor clamps that are arranged at the bottom, the pallet upper end is provided with hook; Pallet is hooked on the lower clamp of those group anchor clamps that place the bottom through hook, and counterweight is set on the pallet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205157468U CN202403981U (en) | 2011-12-12 | 2011-12-12 | Creep deformation testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205157468U CN202403981U (en) | 2011-12-12 | 2011-12-12 | Creep deformation testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202403981U true CN202403981U (en) | 2012-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205157468U Expired - Fee Related CN202403981U (en) | 2011-12-12 | 2011-12-12 | Creep deformation testing device |
Country Status (1)
| Country | Link |
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| CN (1) | CN202403981U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589982A (en) * | 2011-12-12 | 2012-07-18 | 山东大学 | Creep test device and test method thereof |
| CN103389203A (en) * | 2013-07-19 | 2013-11-13 | 浙江吉利汽车研究院有限公司 | Testing device and testing method for stability of coat-and-hat hook |
-
2011
- 2011-12-12 CN CN2011205157468U patent/CN202403981U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589982A (en) * | 2011-12-12 | 2012-07-18 | 山东大学 | Creep test device and test method thereof |
| CN103389203A (en) * | 2013-07-19 | 2013-11-13 | 浙江吉利汽车研究院有限公司 | Testing device and testing method for stability of coat-and-hat hook |
| CN103389203B (en) * | 2013-07-19 | 2016-08-10 | 浙江吉利汽车研究院有限公司 | Hat-and-coat hook stabilizing test device 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: 20120829 Termination date: 20151212 |
|
| EXPY | Termination of patent right or utility model |