CN105758715A - Method for preventing relative tilt of upper shear box and lower shear box in direct shear test - Google Patents
Method for preventing relative tilt of upper shear box and lower shear box in direct shear test Download PDFInfo
- Publication number
- CN105758715A CN105758715A CN201610337267.9A CN201610337267A CN105758715A CN 105758715 A CN105758715 A CN 105758715A CN 201610337267 A CN201610337267 A CN 201610337267A CN 105758715 A CN105758715 A CN 105758715A
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- China
- Prior art keywords
- shear
- shear box
- box
- test
- direct
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
Abstract
The invention discloses a method for preventing relative tilt of an upper shear box and a lower shear box in a direct shear test. A fixing rack is arranged, and comprises a bearing and a fixing rod; the lower surface of the bearing is in excellent contact with the upper surface of the upper shear box; the fixing rod is fixed to a direct shear apparatus baseplate, and meanwhile the upper shear box and a cover plate are subjected to heightening treatment, so that the cover plate is in excellent contact with the inside of the upper shear box and cannot incline, and sample unsymmetrical pressure deformation in the test process can be prevented; a sample is mounted according to the test regulations; the cover plate as well as the fixing rod and the bearing is mounted, the lower surface of the adjusting bearing is in excellent contact with the upper surface of the upper shear box of a direct shear apparatus, and the fixing rod is fixed to the direct shear apparatus baseplate through a bolt in a rigid manner; when the direct shear test begins, the upper shear box and the lower shear box can only conduct relative sliding in the horizontal direction, and the vertical displacement is limited by the fixing rack, so that relative tilt of the upper shear box and the lower shear box in the direct shear test can be prevented. The method is simple to operate, can effectively prevent the problem of relative tilt of the upper shear box and the lower shear box in the direct shear test, and is beneficial to improvement of the test precision.
Description
Technical field
The invention belongs to civil engineering field, prevent the method for upper and lower shear box relative tilt in direct shear test particularly to a kind of.
Background technology
Direct shear test is a kind of common method of indoor measurement soil shear strength, and the method is efficient and convenient, and result treatment is simple, is widely used in scientific research and engineering practice.It is currently mainly used the lever direct shear apparatus shown in Fig. 1 and carries out direct shear test.Due to the defect of direct shear apparatus itself, in this type direct shear apparatus process of the test, vertical pressure Fv is perpendicular to shear surface all the time, but there is an angle a with vertical, as shown in Figure 2.And along with the increase of vertical pressure Fv, angle a also increases therewith.The shearing strength so drawn is bigger with theoretical strength value deviation.
Summary of the invention
It is an object of the invention to provide and a kind of prevent the method for upper and lower shear box relative tilt in direct shear test, to solve the problem mentioned in above-mentioned background technology, thus improving direct shear test precision, improving test reasonability.
The thinking of the present invention: by a fixed mount by between upper and lower shear box and direct shear apparatus base plate vertical fixing, owing to bearing can be freely rotatable, make the shear box can the displacement of occurred level direction；But because the restriction of fixing bar, can not there is vertical displacement in bearing, therefore vertical inclination will not occur shear box.
Concretely comprise the following steps:
(1) a kind of fixed mount is set, this fixed mount includes bearing and fixing bar, the upper surface good contact of the upper shear box of the lower surface of bearing and direct shear apparatus, fixing bar rigidly fixes with direct shear apparatus base plate bolt, upper shear box and cover plate to direct shear apparatus add high disposal simultaneously, cover plate is made to contact well in upper shear box, will not run-off the straight, it is prevented that sample biased deformation in process of the test.
(2) according to the related request of testing regulations, sample is installed.
(3) cover plate is installed, fixing bar and bearing is installed, regulates the upper surface good contact of the lower surface of bearing and the upper shear box of direct shear apparatus, fixing bar and direct shear apparatus base plate bolt are rigidly fixed.
(4) start direct shear test, upper shear box and down cut box can only relative sliding in horizontal direction, vertical displacement is limited by fixed mount, thus realizing preventing upper and lower shear box relative tilt in direct shear test.
The inventive method is simple to operate, can effectively prevent upper and lower shear box relative tilt problem in direct shear test, is conducive to improving test accuracy, and the material of used device is cheap and easy to get, with low cost, it is simple to promote.
Accompanying drawing explanation
Fig. 1 is lever direct shear apparatus schematic diagram.
Fig. 2 is upper and lower shear box relative tilt schematic diagram.
Fig. 3 is the top view of fixed mount in the embodiment of the present invention.
Fig. 4 is fixed mount scheme of installation in the embodiment of the present invention.
Labelling in figure: 1-shear；2-down cut box；The upper shear box of 3-；4-bearing；5-fixes bar；6-direct shear apparatus base plate；7-cover plate；8-sample.
Detailed description of the invention
Below in conjunction with accompanying drawing, presently preferred embodiments of the present invention is described in detail, is understood by user so that advantages and features of the invention can be more easy to, thus protection scope of the present invention being made apparent clear and definite defining.
Embodiment:
(1) a kind of fixed mount is set, this fixed mount includes bearing 4 and fixing bar 5, the upper surface good contact of the upper shear box 3 of the lower surface of bearing 4 and direct shear apparatus, fixing bar 5 rigidly fixes with bolt with direct shear apparatus base plate 6, upper shear box 3 and cover plate 7 to direct shear apparatus add high disposal simultaneously, cover plate 7 is made to contact well in upper shear box 3, will not run-off the straight, it is prevented that sample 8 biased deformation in process of the test.
(2) according to the related request of testing regulations, sample 8 is installed.
(3) cover plate 7 is installed, fixing bar 5 and bearing 4 is installed, regulates the upper surface good contact of the lower surface of bearing 4 and the upper shear box 3 of direct shear apparatus, fixing bar 5 is rigidly fixed with bolt with direct shear apparatus base plate 6.
(4) start direct shear test, upper shear box 3 and down cut box 2 can only relative sliding in horizontal direction, vertical displacement is limited by fixed mount, thus realizing preventing upper and lower shear box relative tilt in direct shear test.
The concrete data that upper shear box 3 and cover plate 7 add in the present embodiment high disposal are: upper shear box 3 is increased to 45mm, and cover plate 7 carries out increasing to 35mm.
Claims (1)
1. one kind prevents the method for upper and lower shear box relative tilt in direct shear test, it is characterised in that concretely comprise the following steps:
(1) a kind of fixed mount is set, this fixed mount includes bearing and fixing bar, the upper surface good contact of the upper shear box of the lower surface of bearing and direct shear apparatus, fixing bar rigidly fixes with direct shear apparatus base plate bolt, upper shear box and cover plate to direct shear apparatus add high disposal simultaneously, cover plate is made to contact well in upper shear box, will not run-off the straight, it is prevented that sample biased deformation in process of the test；
(2) according to the related request of testing regulations, sample is installed；
(3) cover plate is installed, fixing bar and bearing is installed, regulates the upper surface good contact of the lower surface of bearing and the upper shear box of direct shear apparatus, fixing bar and direct shear apparatus base plate bolt are rigidly fixed；
(4) start direct shear test, upper shear box and down cut box can only relative sliding in horizontal direction, vertical displacement is limited by fixed mount, thus realizing preventing upper and lower shear box relative tilt in direct shear test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610337267.9A CN105758715A (en) | 2016-05-21 | 2016-05-21 | Method for preventing relative tilt of upper shear box and lower shear box in direct shear test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610337267.9A CN105758715A (en) | 2016-05-21 | 2016-05-21 | Method for preventing relative tilt of upper shear box and lower shear box in direct shear test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105758715A true CN105758715A (en) | 2016-07-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610337267.9A Pending CN105758715A (en) | 2016-05-21 | 2016-05-21 | Method for preventing relative tilt of upper shear box and lower shear box in direct shear test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105758715A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107515153A (en) * | 2017-08-31 | 2017-12-26 | 常熟市徐润机电有限公司 | The parallel locking device of upper shear box |
| CN107576580A (en) * | 2017-08-31 | 2018-01-12 | 常熟市徐润机电有限公司 | Strain controlling formula direct shear apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102207436A (en) * | 2010-07-26 | 2011-10-05 | 水利部交通运输部国家能源局南京水利科学研究院 | High performance direct shearing apparatus for large contact surfaces |
| CN202471526U (en) * | 2011-12-16 | 2012-10-03 | 暨南大学 | Shearing box device for detecting soil residual strength |
| CN104075938A (en) * | 2014-06-25 | 2014-10-01 | 成都东华卓越科技有限公司 | Anti-upwarp device for shear box |
-
2016
- 2016-05-21 CN CN201610337267.9A patent/CN105758715A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102207436A (en) * | 2010-07-26 | 2011-10-05 | 水利部交通运输部国家能源局南京水利科学研究院 | High performance direct shearing apparatus for large contact surfaces |
| CN202471526U (en) * | 2011-12-16 | 2012-10-03 | 暨南大学 | Shearing box device for detecting soil residual strength |
| CN104075938A (en) * | 2014-06-25 | 2014-10-01 | 成都东华卓越科技有限公司 | Anti-upwarp device for shear box |
Non-Patent Citations (1)
| Title |
|---|
| 董均贵 等: "防止直剪试验剪切盒倾斜的方法及初步验证", 《湖北理工学院学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107515153A (en) * | 2017-08-31 | 2017-12-26 | 常熟市徐润机电有限公司 | The parallel locking device of upper shear box |
| CN107576580A (en) * | 2017-08-31 | 2018-01-12 | 常熟市徐润机电有限公司 | Strain controlling formula direct shear apparatus |
| CN107576580B (en) * | 2017-08-31 | 2023-12-19 | 常熟市徐润机电有限公司 | Strain control type direct shear apparatus |
| CN107515153B (en) * | 2017-08-31 | 2023-12-19 | 常熟市徐润机电有限公司 | Parallel locking device for upper shearing box |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160713 |