CN100585375C - Cutting creep instrument - Google Patents
Cutting creep instrument Download PDFInfo
- Publication number
- CN100585375C CN100585375C CN200710018038A CN200710018038A CN100585375C CN 100585375 C CN100585375 C CN 100585375C CN 200710018038 A CN200710018038 A CN 200710018038A CN 200710018038 A CN200710018038 A CN 200710018038A CN 100585375 C CN100585375 C CN 100585375C
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- shear
- pulley blocks
- shear box
- pressure
- box
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Abstract
The invention discloses a shear creep tester which comprises a testing bench, a shear box arranged on the testing bench and formed by lower and upper shear box portions, a bearing cover arranged on the top of the shear box, a pressure sensor arranged on the bearing cover, and a tension sensor connected with one side of the upper shear box portion. The pressure sensor is connected with a vertical pressure loading pulley block by a transmission frame. The lower shear box portion is connected with a horizontal shear loading pulley block by a traction rope. The moving end of the traction rope, bridging the vertical pressure loading pulley block and the horizontal shear loading pulley block, is connected with a counterweight. The invention has the advantages of reasonable design, simple, flexible and practical structure of pulley block, high test accuracy, stable performance, and convenient operation.
Description
Technical field
The present invention relates to be used in the Geotechnical Engineering field measure the device of native creep properties, 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, adopting traditional lever force mechanism, 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.
Summary of the invention
The objective of the invention is the deficiency that exists at prior art, a kind of simple in structure, stable work in work, accuracy height are provided, use easy to operate cutting creep instrument.
Technical scheme of the present invention 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 present invention compared with prior art has the following advantages:
(1) the present invention replaces the leverage of traditional instrument with pulley blocks, and in order to enlarging pressure at right angle and the horizontal shear that is applied to soil sample by counterweight, so it is simple for structure, and volume is little, working stability, test accuracy height.
(2) dirigibility of pulley blocks mechanism is good, if when needed horizontal or vertical load is very big, can two pulley blocks and usefulness, also can change the pulley blocks of wide range, thereby satisfy the needs of actual engineering.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, the present invention includes testing table 1, be positioned at testing table 1 and be provided with the shear box of being made up of 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, 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 invention 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, 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 on two different counterweights (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 |
|---|---|---|---|
| CN200710018038A CN100585375C (en) | 2007-06-13 | 2007-06-13 | Cutting creep instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710018038A CN100585375C (en) | 2007-06-13 | 2007-06-13 | Cutting creep instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101105432A CN101105432A (en) | 2008-01-16 |
| CN100585375C true CN100585375C (en) | 2010-01-27 |
Family
ID=38999429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710018038A Expired - Fee Related CN100585375C (en) | 2007-06-13 | 2007-06-13 | Cutting creep instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100585375C (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393354B (en) * | 2011-10-20 | 2014-06-25 | 上海交通大学 | Intelligent soil engineering shear rheometer |
| CN103134729B (en) * | 2013-02-18 | 2015-01-07 | 长安大学 | Stress-strain control type direct shear apparatus |
| CN104020047A (en) * | 2013-03-01 | 2014-09-03 | 中国地质科学院水文地质环境地质研究所 | Solidification and permeation combined testing device and method |
| CN104020092B (en) * | 2013-03-01 | 2017-08-29 | 中国地质科学院水文地质环境地质研究所 | One kind consolidation pore water pressure combined test device and method |
| CN104020052B (en) * | 2013-03-01 | 2018-02-23 | 中国地质科学院水文地质环境地质研究所 | A kind of mechanical booster system |
| CN104020273A (en) * | 2013-03-01 | 2014-09-03 | 中国地质科学院水文地质环境地质研究所 | Ultrahigh pressure consolidation test device and method |
| CN103439198B (en) * | 2013-09-06 | 2016-02-17 | 中国矿业大学(北京) | A kind of weak coal petrography material shear creep test device |
| CN104181033A (en) * | 2014-08-26 | 2014-12-03 | 华中科技大学 | Gravity load amplifier |
| CN105223078B (en) * | 2015-10-27 | 2017-11-21 | 哈尔滨工程大学 | A kind of protection type vibration isolator 5-linked creep testing machine |
| CN106226173B (en) * | 2016-10-12 | 2020-09-15 | 山西省交通科学研究院 | Device and method for measuring shearing deformation of soil under vacuum preloading effect |
| CN107764645B (en) * | 2017-10-09 | 2021-05-07 | 中国矿业大学 | Large-size clay high-pressure consolidation test device |
| CN108225918B (en) * | 2018-01-30 | 2024-07-09 | 清华大学 | Large crushed stone-rock contact surface rheological property tester and use method thereof |
| CN108645723A (en) * | 2018-07-27 | 2018-10-12 | 中交第公路勘察设计研究院有限公司 | Two-sided cutting creep test device |
| CN109238833A (en) * | 2018-11-09 | 2019-01-18 | 福州大学 | The mechanical creep test device system of accumbency type and application method |
| CN109297825A (en) * | 2018-11-14 | 2019-02-01 | 福州大学 | A kind of easy mechanically creep test device and its application method |
| CN112730096A (en) * | 2021-01-22 | 2021-04-30 | 四川大学 | Rock rheology test system |
| CN112730097A (en) * | 2021-01-22 | 2021-04-30 | 四川大学 | Long-duration high-precision rheological test system for simulating deep-ground complex conditions |
| CN113804428B (en) * | 2021-10-20 | 2024-04-12 | 江南造船(集团)有限责任公司 | Multi-connected creep and static stiffness testing machine |
-
2007
- 2007-06-13 CN CN200710018038A patent/CN100585375C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 一种改进的土体直剪蠕变仪及应用. 谷任国，房营光.岩石力学与工程学报，第25卷第增2期. 2006 |
| 一种改进的土体直剪蠕变仪及应用. 谷任国，房营光.岩石力学与工程学报，第25卷第增2期. 2006 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101105432A (en) | 2008-01-16 |
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Granted publication date: 20100127 Termination date: 20120613 |