CN2911658Y - Direct shear instrument with linear guidway - Google Patents
Direct shear instrument with linear guidway Download PDFInfo
- Publication number
- CN2911658Y CN2911658Y CN 200620049930 CN200620049930U CN2911658Y CN 2911658 Y CN2911658 Y CN 2911658Y CN 200620049930 CN200620049930 CN 200620049930 CN 200620049930 U CN200620049930 U CN 200620049930U CN 2911658 Y CN2911658 Y CN 2911658Y
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- CN
- China
- Prior art keywords
- fixed
- base
- direct shear
- box
- linear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000005096 rolling process Methods 0.000 abstract description 10
- 238000010008 shearing Methods 0.000 abstract description 8
- 238000012360 testing method Methods 0.000 abstract description 5
- 239000002689 soil Substances 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 241001212149 Cathetus Species 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
Images
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
本实用新型涉及测定土样抗剪强度的直接剪切仪。本实用新型提供的带直线导轨的直接剪切仪，包括上盒(6)和活动的下盒(10)，下盒固定在底座(2)上，而底座固定在直线导轨(12)上。由于下盒固定在直线滚动导轨上，而直线滚动导轨是一种新型的高精度低摩阻的机械元件，这样从结构上保证了剪切力测试的精度。
The utility model relates to a direct shear instrument for measuring the shear strength of soil samples. The direct shearing instrument with the linear guide provided by the utility model comprises an upper box (6) and a movable lower box (10), the lower box is fixed on the base (2), and the base is fixed on the linear guide (12). Since the lower box is fixed on the linear rolling guide rail, which is a new type of high-precision and low-friction mechanical element, the accuracy of the shear force test is guaranteed structurally.
Description
Technical field
The utility model relates to the direct shear apparatus of measuring the soil sample shearing strength.
Background technology
Direct shear test is the simplest method of measuring the shearing strength of soil, and what it was measured is that soil sample is scheduled to the shearing strength on the shear surface.The employed instrument of direct shear test is called direct shear apparatus, and by the difference of loading mode, direct shear apparatus can be divided into two kinds of strain control type and Stress Control formulas.The former promotes sample with the constant speed level to produce displacement and measure corresponding shear stress; The latter then is that classification applies horizontal shearing stress to sample, measures corresponding displacement simultaneously.
What China generally adopted at present is strain control type direct shear apparatus, the critical piece (see figure 1) of this instrument is made up of fixing last box 6 and movable following box 10, and last box is fixed, and following box is fixed on the base 2, and base 2 is placed on the steel ball 11, can slide in the horizontal direction.Sample is placed in the box up and down between two permeable stones 3.During test, apply a certain normal stress s by lever system by pressurizing piston 5 and 3 pairs of samples of permeable stone, measure its size by micrometer gauge 4, promote box 10 down by wheel shaft 1 constant speed then, sample 7 is cut until destruction on the surface level between the box up and down on the edge, and the big I of shearing force t is measured by the dynamometer that contacts with last box.Dynamometer comprises measure one's own ability ring 9 and micrometer gauge 8.
Because base 2 bottoms are equipped with ball, when shearing, following box mobile is by the scrolling realization of ball, and friction force is bigger between ball and the surface level; Therefore bring error to experiment.
Line slideway is a kind of prior art.When movement parts when holding the guiding element moving linearly, the guide rail that holds on the guiding element plays supporting and guiding, i.e. support motion spare and guarantee that movement parts under the effect of external force (weight of load and movement parts itself), carries out rectilinear motion along given direction.Guide rail has higher guiding accuracy simultaneously, and it is light steady to move.Wherein rolling linear guide is to put into suitable steel ball between slide block and guide rail, makes the sliding friction between slide block and the guide rail become rolling friction, reduces the friction of motion resistance between the two greatly, and its friction factor is between 0.002～0.005.Usually it forms (seeing Fig. 2,3) by guide rail (18), slide block (19), steel ball (20), back device (14), retainer (15), end cover (16) and baffle plate (17) etc.When guide rail and slide block are done relative motion, steel ball four raceways that just process on the guide rail is hardened and accurate grinding processes roll, enter raceway again after slide block end steel ball enters the back hole by back device (back device) again, steel ball carries out rolling movement like this again and again.The dust seal end cap is equipped with at back device two ends, can prevent effectively that dust, bits end from entering slide block inside.
Summary of the invention
The direct shear apparatus of the band line slideway that the utility model provides comprises box (6) and movable following box (10), and following box is fixed on the base (2), and base is fixed on the line slideway (12).
Further improve is that base with dynamometer also is fixed on the line slideway (13).
Above-mentioned line slideway (13) can be and the fixing same guide rail of base.
Describe its structure and beneficial effect in detail below in conjunction with embodiment of the present utility model.
Description of drawings
Fig. 1 is the structural drawing of direct shear apparatus in the prior art;
Fig. 2 is the structural drawing of prior art cathetus rolling guide;
Fig. 3 is the structural drawing of prior art cathetus rolling guide;
Fig. 4 is the structural drawing of the utility model embodiment.
Embodiment
As shown in Figure 3, the direct shear apparatus of the band line slideway that the utility model provides, by fixing last box 6 and movable following box 10, measure one's own ability ring 9 and micrometer gauge 8, pressurizing piston 5 and permeable stone 3 and wheel shaft 1 are formed.Last box is fixed, and following box is fixed on the base 2, and base is fixed on the linear rolling track 12.The base of proving ring also is fixed on the linear rolling track 13.
Because box is fixed on the linear rolling track down, and linear rolling track is the mechanical organ that a kind of novel high precision is hanged down frictional resistance, and its friction factor has guaranteed the precision of shearing force testing like this from structure between 0.002～0.005.
Claims (2)
1, the direct shear apparatus of band line slideway comprises dynamometer, last box (6) and movable following box (10), and following box is fixed on the base (2), it is characterized in that base is fixed on the line slideway (12).
2, the direct shear apparatus of band line slideway according to claim 1 is characterized in that the base of dynamometer also is fixed on the line slideway (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620049930 CN2911658Y (en) | 2006-01-25 | 2006-01-25 | Direct shear instrument with linear guidway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620049930 CN2911658Y (en) | 2006-01-25 | 2006-01-25 | Direct shear instrument with linear guidway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2911658Y true CN2911658Y (en) | 2007-06-13 |
Family
ID=38133524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620049930 Expired - Fee Related CN2911658Y (en) | 2006-01-25 | 2006-01-25 | Direct shear instrument with linear guidway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2911658Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101762431B (en) * | 2010-01-22 | 2011-05-04 | 长安大学 | Freeze-thaw cycle coarse-grained soil shearing test device |
| CN102135475A (en) * | 2010-08-04 | 2011-07-27 | 中国海洋大学 | Direct-cutting antiskid structure model tester |
| CN102980816A (en) * | 2012-12-06 | 2013-03-20 | 重庆交通大学 | Soil mass shearing rupture failure testing device and method |
| CN103630448A (en) * | 2013-07-25 | 2014-03-12 | 广西交通科学研究院 | Pavement structure interlayer interface shear strength testing device and method thereof |
-
2006
- 2006-01-25 CN CN 200620049930 patent/CN2911658Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101762431B (en) * | 2010-01-22 | 2011-05-04 | 长安大学 | Freeze-thaw cycle coarse-grained soil shearing test device |
| CN102135475A (en) * | 2010-08-04 | 2011-07-27 | 中国海洋大学 | Direct-cutting antiskid structure model tester |
| CN102980816A (en) * | 2012-12-06 | 2013-03-20 | 重庆交通大学 | Soil mass shearing rupture failure testing device and method |
| CN102980816B (en) * | 2012-12-06 | 2016-03-30 | 重庆交通大学 | Soil body shear fracture failure test device and method |
| CN103630448A (en) * | 2013-07-25 | 2014-03-12 | 广西交通科学研究院 | Pavement structure interlayer interface shear strength testing device and method thereof |
| CN103630448B (en) * | 2013-07-25 | 2015-11-18 | 广西交通科学研究院 | A kind of pavement structure interlayer interface shear strength testing apparatus and method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |