CN103969130A - Manual equal strain direct shear apparatus - Google Patents
Manual equal strain direct shear apparatus Download PDFInfo
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- CN103969130A CN103969130A CN201410139777.6A CN201410139777A CN103969130A CN 103969130 A CN103969130 A CN 103969130A CN 201410139777 A CN201410139777 A CN 201410139777A CN 103969130 A CN103969130 A CN 103969130A
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- horizontal
- shear
- cover plate
- pressure transmission
- pressure transmitting
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Abstract
A manual equal strain direct shear apparatus relates to a soil testing instrument. The manual equal strain direct shear apparatus comprises a support rack, a horizontal loading device, a vertical pressurizing device, a shear box and a horizontal shear measuring device, which are all arranged on the support rack, wherein a sliding frame is arranged at the bottom of the shear box; the sliding frame is arranged on the support rack in a sliding manner; the horizontal loading device comprises a horizontal ejector pad arranged on the support rack through a guide rail, and a hand wheel used for driving the horizontal ejector pad to move by a transmission gear set; the horizontal ejector pad is connected with the sliding frame; the vertical pressurizing device comprises a pressure transmitting cover plate placed above samples in the shear box and a pressure transmitting bolt driven by a force application mechanism to apply vertical pressure on the pressure transmitting cover plate; a hemispherical bulge is arranged at the bottom end of the pressure transmitting bolt; a spherical groove matched with the hemispherical bulge is formed in the pressure transmitting cover plate. According to the manual equal strain direct shear apparatus, as the samples in the shear box bear the pressure in the vertical direction in the testing process, the pressure transmitting effect is improved and then the testing precision is improved.
Description
Technical field
The present invention relates to a kind of earthwork test Instrument, specifically a kind of manual strain direct shear apparatus that waits.
Background technology
Deng strain direct shear apparatus, for measuring native shearing strength, conventionally adopt four soil samples, apply shearing force respectively to shear under different pressures, the shear stress while trying to achieve soil sample shear failure, then determines intensive parameter angle of internal friction according to Coulomb's law
and cohesiveness
.Direct shear apparatus applies vertical pressure by the pressure transmission screw of its vertical pressue device to the sample in shear box, between the pressure transmission screw of existing direct shear apparatus and the pressure transmission cover plate at shear box top, surface of contact is plane, along with the movement of shear box under horizontal shear effect, between pressure transmission screw and pressure transmission cover plate, contact not tight, make sample in the vertical direction pressurized inhomogeneous, affect pressure transmission effect, reduce test accuracy.
Summary of the invention
Not tight in order to contact between the pressure transmission screw that solves existing direct shear apparatus and pressure transmission cover plate, the inhomogeneous problem of sample in the vertical direction pressurized causing, the invention provides a kind of manual strain direct shear apparatus that waits.
The present invention solves the problems of the technologies described above adopted technical scheme to be: a kind of manual strain direct shear apparatus that waits, comprise support stand and be arranged on the horizontal loading system on support stand, vertical pressue device, shear box and horizontal shear measurement mechanism, the bottom of shear box is provided with slider bar, slider bar is slidably arranged on support stand, described horizontal loading system comprises the handwheel that is arranged on the horizontal pushing block on support stand and is moved by the horizontal pushing block of driving gear set drive by guide rail, horizontal pushing block is connected with slider bar, described vertical pressue device comprises the pressure transmission cover plate and the pressure transmission screw that is applied vertical pressure by force application mechanism band trend pressure transmission cover plate that are placed on sample top in shear box, the bottom of described pressure transmission screw is provided with hemispherical projections, described pressure transmission cover plate is provided with the ball recess matching with hemispherical projections.
The diameter of described hemispherical projections is 10mm, and the degree of depth of described ball recess is 4mm, and top diameter is 11mm.
Beneficial effect: the present invention by arranging corresponding hemispherical projections and ball recess between pressure transmission screw and pressure transmission cover plate, thereby can make both closely be combined together, in process of the test, both are close contact still, sample in the vertical direction pressurized is even, has improved pressure transmission effect, and then has improved the precision of test.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of pressure transmission screw of the present invention and pressure transmission cover plate.
In figure, be labeled as: 1, support stand, 2, horizontal loading system, 3, vertical pressue device, 4, shear box, 5, horizontal shear measurement mechanism, 6, pressure transmission screw, 7, pressure transmission cover plate, 8, hemispherical projections, 9, ball recess, 10, horizontal pushing block, 11, handwheel, 12, slider bar, 13, lever, 14, column, 15, handwheel second, 16, scale pan, 17, extension bar adding mechanism.
Embodiment
As depicted in figs. 1 and 2, a kind of manual strain direct shear apparatus that waits, comprise support stand 1 and be arranged on the horizontal loading system 2 on support stand 1, vertical pressue device 3, shear box 4 and horizontal shear measurement mechanism 5, the bottom of shear box 4 is provided with slider bar 12, slider bar 12 is slidably arranged on support stand 1, described horizontal loading system 2 comprises the handwheel 11 that is arranged on the horizontal pushing block 10 on support stand 1 and is moved by the horizontal pushing block 10 of driving gear set drive by guide rail, horizontal pushing block 10 is connected with slider bar 12, described vertical pressue device 3 comprises the pressure transmission cover plate 7 and the pressure transmission screw 6 that is applied vertical pressure by force application mechanism band trend pressure transmission cover plate 7 that are placed on the interior sample of shear box 4 top, the bottom of described pressure transmission screw 6 is provided with hemispherical projections 8, described pressure transmission cover plate 7 is provided with the ball recess 9 matching with hemispherical projections 8.
The diameter of described hemispherical projections 8 is 10mm, and the degree of depth of described ball recess 9 is 4mm, and top diameter is 11mm, adopts the structure of this kind of size, can make pressure transmission screw 6 and pressure transmission cover plate 7 coordinate tightr, and loading and off-load are all easy to operate.
The force application mechanism of described vertical pressue device 3 comprises the column 14 that is arranged on support stand 1 bottom, be arranged on lever 13 and handwheel second 15 on column 14, at the two ends of lever 13, be respectively equipped with scale pan 16 and extension bar adding mechanism 17, by put into the mass of Different Weight at scale pan 16, make extension bar adding mechanism 17 to the sample in shear box 4, apply the pressure of the vertical direction of different sizes.
Claims (2)
1. one kind is manually waited strain direct shear apparatus, comprise support stand (1) and be arranged on the horizontal loading system (2) on support stand (1), vertical pressue device (3), shear box (4) and horizontal shear measurement mechanism (5), the bottom of shear box (4) is provided with slider bar (12), slider bar (12) is slidably arranged on support stand (1), described horizontal loading system (2) comprises the handwheel (11) that is arranged on the horizontal pushing block (10) on support stand (1) and is driven horizontal pushing block (10) to move by driving gear set by guide rail, horizontal pushing block (10) is connected with slider bar (12), it is characterized in that: described vertical pressue device (3) comprises the pressure transmission cover plate (7) and the pressure transmission screw (6) that is applied vertical pressure by force application mechanism band trend pressure transmission cover plate (7) that are placed on the interior sample of shear box (4) top, the bottom of described pressure transmission screw (6) is provided with hemispherical projections (8), described pressure transmission cover plate (7) is provided with the ball recess (9) matching with hemispherical projections (8).
2. a kind of manual strain direct shear apparatus that waits as claimed in claim 1, is characterized in that: the diameter of described hemispherical projections (8) is 10mm, and the degree of depth of described ball recess (9) is 4mm, and top diameter is 11mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410139777.6A CN103969130B (en) | 2014-04-09 | 2014-04-09 | A kind of manually grade strains direct shear apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410139777.6A CN103969130B (en) | 2014-04-09 | 2014-04-09 | A kind of manually grade strains direct shear apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103969130A true CN103969130A (en) | 2014-08-06 |
| CN103969130B CN103969130B (en) | 2016-11-09 |
Family
ID=51238899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410139777.6A Expired - Fee Related CN103969130B (en) | 2014-04-09 | 2014-04-09 | A kind of manually grade strains direct shear apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103969130B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596867A (en) * | 2015-01-23 | 2015-05-06 | 长江三峡勘测研究院有限公司（武汉） | Novel double-wheel equal-strain direct shear apparatus |
| CN105606460A (en) * | 2015-12-22 | 2016-05-25 | 中南大学 | Contact surface equal-strain direct shear apparatus and sample preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110098182A (en) * | 2010-02-26 | 2011-09-01 | 건국대학교 산학협력단 | Direct shear test apparatus |
| CN202720162U (en) * | 2012-06-26 | 2013-02-06 | 浙江辰鑫机械设备有限公司 | Concrete test block compression-testing machine |
| CN203772658U (en) * | 2014-04-09 | 2014-08-13 | 洛阳理工学院 | Hand-operated equal-strain direct shear apparatus |
-
2014
- 2014-04-09 CN CN201410139777.6A patent/CN103969130B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110098182A (en) * | 2010-02-26 | 2011-09-01 | 건국대학교 산학협력단 | Direct shear test apparatus |
| CN202720162U (en) * | 2012-06-26 | 2013-02-06 | 浙江辰鑫机械设备有限公司 | Concrete test block compression-testing machine |
| CN203772658U (en) * | 2014-04-09 | 2014-08-13 | 洛阳理工学院 | Hand-operated equal-strain direct shear apparatus |
Non-Patent Citations (2)
| Title |
|---|
| GB/T 4934.1-2008土工试验仪器 剪切仪 第1部分：应变控制式直剪仪: "《GB/T 4934.1-2008土工试验仪器 剪切仪 第1部分：应变控制式直剪仪》", 30 September 2008 * |
| 刘建锋 等: "土的直剪试验缺陷探讨", 《四川水力发电》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596867A (en) * | 2015-01-23 | 2015-05-06 | 长江三峡勘测研究院有限公司（武汉） | Novel double-wheel equal-strain direct shear apparatus |
| CN105606460A (en) * | 2015-12-22 | 2016-05-25 | 中南大学 | Contact surface equal-strain direct shear apparatus and sample preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103969130B (en) | 2016-11-09 |
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Granted publication date: 20161109 Termination date: 20170409 |
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