CN201051061Y - Cutting creep test instrument - Google Patents
Cutting creep test instrument Download PDFInfo
- Publication number
- CN201051061Y CN201051061Y CNU2007200320151U CN200720032015U CN201051061Y CN 201051061 Y CN201051061 Y CN 201051061Y CN U2007200320151 U CNU2007200320151 U CN U2007200320151U CN 200720032015 U CN200720032015 U CN 200720032015U CN 201051061 Y CN201051061 Y CN 201051061Y
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- pressure
- pulley blocks
- box
- shear
- horizontal
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Abstract
The utility model discloses a shearing creep apparatus, which comprises an experiment bench, and a shearing box which is constituted by a lower shearing box and an upper shearing box is arranged on the experiment bench. The top portion of the shearing box is provided with a pressure-bearing cover, a pressure sensor is arranged on the pressure-bearing cover, one side of the shearing box is connected with a pulling sensor. The pressure sensor is connected with a perpendicular pressure loading pulley block through a force transmission framework. The lower shearing box is connected with a horizontal shearing force loading pulley block through a dragline, and movable ends of the dragline which is arranged on the perpendicular pressure loading pulley block and the horizontal shearing force loading pulley block are connected with a counterweight. The design of the utility model is reasonable, and the pulley group has the advantages of practical, flexible, and simple structure, stable working performance, high accuracy, and convenient employment and operation.
Description
Technical field
The utility model relates to the device of measuring the creep properties of soil in the Geotechnical Engineering field, particularly a kind of cutting creep instrument.
Background technology
Under ideal state, soil body test specimen is to be normal stress F at vertical acting force
vWith horizontal applied force be shear stress F
hActing in conjunction destroy down F wherein
vMust be vertical acting force, the desirable failure mode of test specimen should be the parallel changing of the relative positions of a side with respect to opposite side.The flow graph of present domestic use generally adopts long lever mechanism to apply vertical and horizontal loading, yet adopt the leverage load application to have the defective of following several respects: the shear box size of (1) domestic boxshear apparatus that generally adopts is less than normal, and area is generally 30cm
2, first when soil sample is sheared from the sample edge, and circular box has formed the obvious stress concentration phenomenon in edge at the very start, in whole shear history, there is the uneven problem of shearing stress distribution in the application point place shear stress maximum near shear box all the time; (2) soil sample distortion in a single day, lever can tilt, and the direction of vertical force can tilt change applied force F in the experiment because of lever
vIncreasing, the angle of lever and horizontal direction is also increasing, F
vBe not all the time perpendicular to shear surface, but one angle arranged,, thereby caused loading error increasing yet along with the raising that experimental precision is required with vertical direction, cause test figure than large deviation, experiment showed, F
vThe angle of internal friction of gained and cohesive strength are all greater than F during out of plumb
vValue when vertical; (3) two-wayly all adopt the lever reinforcing, make equipment volume huge, because the length of lever can not be oversize, loaded value is limited, and capacity value does not reach the sample actual loading.Maximum horizontal shear stress is 300kPa, and vertical normal stress is 400kPa.If consider above-mentioned first defective, increase the sample area, as increase to 10 * 10=100cm
2If, going up afterburning machine, the maximum horizontal stress that provides is respectively 90kPa and 120kPa with vertical normal stress, is equivalent to the suffered natural stress of 6 meters soil samples of degree of depth less than.
The utility model content
The purpose of this utility model is the deficiency that exists at prior art, a kind of simple in structure, stable work in work, accuracy height is provided, uses easy to operate cutting creep instrument.
The technical solution of the utility model is: a kind of cutting creep instrument, comprise testing table 1, be positioned at testing table 1 and be provided with the shear box of forming by down cut box 2 and last shear box 3, the top of described shear box is provided with pressure cap 4, pressure cap 4 is provided with pressure transducer 5, one side of last shear box 3 is connected with pulling force sensor 10, it is characterized in that: described pressure transducer 5 loads pulley blocks 8 by power transmission framework 6 and pressure at right angle and is connected; Down cut box 2 loads pulley blocks 7 by traction rope and horizontal shear and is connected; Being arranged on pressure at right angle loading pulley blocks 8 is connected with counterweight 9 with the movable end that horizontal shear loads the traction rope on the pulley blocks 7.
The utility model compared with prior art has the following advantages: the utility model changes the leverage of traditional instrument into pulley blocks, in order to enlarge pressure at right angle and horizontal shear, the dirigibility of pulley blocks is good, when horizontal or vertical if desired load is very big, can two pulley blocks and usefulness, the also pulley blocks of replaceable wide range, thus satisfy the needs of actual engineering, pulley blocks simple in structure is beneficial to maintenance and renewal to instrument; The utility model volume reduces, structure is simpler, working stability, accuracy height.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
The utility model will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, the utility model comprises testing table 1, is positioned at testing table 1 and is provided with the shear box of being made up of down cut box 2 and last shear box 3, and the top of described shear box is provided with pressure cap 4, pressure cap 4 is provided with pressure transducer 5, and a side of last shear box 3 is connected with pulling force sensor 10; Described pressure transducer 5 loads pulley blocks 8 by power transmission framework 6 and pressure at right angle and is connected; Down cut box 2 loads pulley blocks 7 by traction rope and horizontal shear and is connected; Being arranged on pressure at right angle loading pulley blocks 8 is connected with counterweight 9 with the movable end that horizontal shear loads the traction rope on the pulley blocks 7.
Described shear box is square.
Described pressure at right angle loads the below that pulley blocks 8 and horizontal shear loading pulley blocks 7 and counterweight 9 all are arranged on testing table 1.
Pressure at right angle of the present utility model loads and pulley blocks mechanism is all adopted in the horizontal shear loading.Pulley blocks be by fixed pulley and running block altogether can the laborsaving device that can change the direction of power again.In actual engineering, the thickness of general major landslip can reach 30m, and the native maximum horizontal shear stress that is subjected to of estimation is that 300kPa, maximum perpendicular compressive stress are 600kPa thus.In experiment, if the soil sample area is big, is unpractical to the power that soil sample applies above-mentioned size directly, and it is also limited to adopt lever to add the range of vertical force with counterweight, along with the distortion of soil also can produce a series of errors, if adopt pulley blocks mechanism then to have good dirigibility.If when pressure at right angle of the present invention adds pulley blocks five travelling block of 8 employings and four fixed pulleys compositions, then pressure at right angle can be enlarged 10 times (disregarding friction), if will apply the vertical compressive stress of 600kPa, when area is 100cm to soil sample
2The time, required load is 6kN, and 9 need of counterweight can meet the demands when being added to 0.6kN; Horizontal shear loads pulley blocks 7 and adopts two travelling block and two fixed pulleys to form, and horizontal shearing stress can be enlarged 5 times, if will apply the horizontal shearing stress of 300kPa to soil sample, when required load was 3kN, counterweight only need be added to 0.6kN and get final product.Therefore, level and vertical load reach maximal value, and the counterweight that only adds 60kg is to be feasible fully.
Claims (3)
1. cutting creep instrument, comprise testing table (1), be positioned at testing table (1) and be provided with the shear box of forming by down cut box (2) and last shear box (3), the top of described shear box is provided with pressure cap (4), pressure cap (4) is provided with pressure transducer (5), one side of last shear box (3) is connected with pulling force sensor (10), it is characterized in that: described pressure transducer (5) loads pulley blocks (8) by power transmission framework (6) and pressure at right angle and is connected; Down cut box (2) loads pulley blocks (7) by traction rope and horizontal shear and is connected; Being arranged on pressure at right angle loading pulley blocks (8) is connected with counterweight (9) with the movable end that horizontal shear loads the traction rope on the pulley blocks (7).
2. cutting creep instrument according to claim 1 is characterized in that: described shear box is square.
3. cutting creep instrument according to claim 1 is characterized in that: described pressure at right angle loads the below that pulley blocks (8) and horizontal shear loading pulley blocks (7) and counterweight (9) all are arranged on testing table (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200320151U CN201051061Y (en) | 2007-06-13 | 2007-06-13 | Cutting creep test instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200320151U CN201051061Y (en) | 2007-06-13 | 2007-06-13 | Cutting creep test instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201051061Y true CN201051061Y (en) | 2008-04-23 |
Family
ID=39337551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200320151U Expired - Lifetime CN201051061Y (en) | 2007-06-13 | 2007-06-13 | Cutting creep test instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201051061Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699215A (en) * | 2016-01-14 | 2016-06-22 | 西北大学 | Novel soft-rock shearing rheometer |
| CN107764645A (en) * | 2017-10-09 | 2018-03-06 | 中国矿业大学 | A kind of experimental rig of large scale clay high pressure consolidation |
| CN108362579A (en) * | 2018-05-25 | 2018-08-03 | 中国电建集团成都勘测设计研究院有限公司 | Portable rock mass direct shearing test device |
| CN109238796A (en) * | 2018-07-23 | 2019-01-18 | 绍兴文理学院 | A kind of three axis sample sample preparation devices of Bidirectional-pressure |
| CN113376047A (en) * | 2021-07-05 | 2021-09-10 | 西南交通大学 | Rotary reciprocating friction testing machine |
-
2007
- 2007-06-13 CN CNU2007200320151U patent/CN201051061Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699215A (en) * | 2016-01-14 | 2016-06-22 | 西北大学 | Novel soft-rock shearing rheometer |
| CN105699215B (en) * | 2016-01-14 | 2018-12-14 | 西北大学 | A kind of soft rock shear rheology instrument |
| CN107764645A (en) * | 2017-10-09 | 2018-03-06 | 中国矿业大学 | A kind of experimental rig of large scale clay high pressure consolidation |
| CN108362579A (en) * | 2018-05-25 | 2018-08-03 | 中国电建集团成都勘测设计研究院有限公司 | Portable rock mass direct shearing test device |
| CN109238796A (en) * | 2018-07-23 | 2019-01-18 | 绍兴文理学院 | A kind of three axis sample sample preparation devices of Bidirectional-pressure |
| CN109238796B (en) * | 2018-07-23 | 2020-11-03 | 绍兴文理学院 | Two-way pressurized triaxial sample preparation device |
| CN113376047A (en) * | 2021-07-05 | 2021-09-10 | 西南交通大学 | Rotary reciprocating friction testing machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20070613 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |