CN105758738A - Electric double-surface shear apparatus - Google Patents
Electric double-surface shear apparatus Download PDFInfo
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- CN105758738A CN105758738A CN201610256976.4A CN201610256976A CN105758738A CN 105758738 A CN105758738 A CN 105758738A CN 201610256976 A CN201610256976 A CN 201610256976A CN 105758738 A CN105758738 A CN 105758738A
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- electric cylinder
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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
- G01N3/24—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
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
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- General Physics & Mathematics (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to an electric double-surface shear apparatus.An upper shear box, a middle shear box and a lower shear box are arranged on a foundation base, a bearing plate is arranged on the upper end surface of the upper shear box, a pressurizing plate is arranged on the bearing plate, an A pull-pressure sensor is arranged on the pressurizing plate and connected with an extension bar of a perpendicular pressurizing electric cylinder, and a perpendicular displacement sensor is mounted on one balanced vertical column and is in contact with the pressurizing plate; the middle shear box is further connected with a B pull-pressure sensor which is connected with a horizontal pressurizing electric cylinder on a slide rail base, and a displacement infrared emitter is arranged on the middle shear box; a control cabinet is further arranged on the foundation base, controls travel adjustment of all electric cylinders and processes sensor date in real time; the apparatus can be used for shearing strength test of an undisturbed soil sample, a disturbed soil sample and a soft rock sample, the whole test process comprises sample installation, sample performance and sample collection after test, and sample mounting and dismounting operation is convenient.
Description
Technical field
The invention belongs to Geotechnical Engineering field, be specifically related to be applied to the electric double-sided boxshear apparatus of one of Rock And Soil.
Background technology
The shearing strength of Rock And Soil refers to the limit capacity of Rock And Soil opposing failure by shear, is one of important mechanical index of Rock And Soil.Substantial amounts of engineering practice shows, the destruction of Retaining Structures, the generation on all kinds landslide and the destruction overwhelming majority of buildings or structures ground belong to failure by shear, and the shearing strength rule therefore studying Rock And Soil all has very important theoretical and practical significance for engineering design, construction and management.The test measuring Rock And Soil Shear Strength Index is called the shearing test of Rock And Soil, and test method has indoor shearing test and in-situ shear test.Owing to laboratory test stress condition is clear, easily repeating and spend low, relatively in-situ shear test application is wider.
Current indoor shearing test both domestic and external mainly has direct shear test and triaxial compressions shearing test, and the direct shear apparatus that wherein direct shear test uses mostly is single box direct shear apparatus and tetrad is cut.Two kinds of direct shear apparatuses adopt smaller circular cutout box, and in process of the test, stress concentration phenomenon is comparatively serious, affects test result；The applying of the vertical load of instrument all adopts leverage, can occur to tilt largely after applying counterweight, causes the vertical load loss acting on sample bigger；The applying of the horizontal shear of instrument then adopts worm-and-wheel gear, horizontal shear displacement can only be controlled, namely realize strain controlling formula shearing test, it is impossible to apply constant shearing to measure the deformation rule of sample failure by shear, and sample destroys only along the single contact surface of upper and lower shear box.
Practical Project situation shows, the destruction of Retaining Structures, the generation on all kinds landslide and the destruction of buildings or structures ground are not smooth shear surfaces, it is more occur that obvious shear band destroys, it is therefore desirable to certain thickness shear band is carried out shear strength test, and also little for the research of shear band shearing strength at present, main cause is a lack of studying, with this, the two-sided cutting instrument matched.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, it is an object of the invention to provide a kind of electric double-sided boxshear apparatus, it it is a kind of integrated product that can realize Rock And Soil stress, strain controlling shearing test, be capable of being further applied load, the accurate control of shear rate, thus realizing Stress Control formula dual shear test and strain controlling formula dual shear test, have the advantages that higher stability and reliability, process of the test are evenly distributed by load.
In order to achieve the above object, the technical scheme is that
nullA kind of electric double-sided boxshear apparatus，Including sole plate 1，Sole plate 1 is provided with down cut box 4，Intermediate shear box 5 and upper shear box 7 it is followed successively by above down cut box 4，Down cut box 4 and upper shear box 7 both sides are respectively through shear box adpting flange 3、6 are connected with the balance column 16 of both sides，The upper surface of upper shear box 7 is provided with bearing plate 8，Bearing plate 8 is provided with bearing column 9，Bearing column 9 is provided above pressurization disk 10，Pressurization disk 10 is provided above A pull pressure sensor 11，The upper end of A pull pressure sensor 11 is connected with the extension bar of press perpendicular electric cylinder 13 by A ball pivot，The balance column 16 of both sides is affixed by crossbeam 14，Wherein the balance column 16 of side is provided with vertical displacement sensor 19 by vertical displacement sensor stand 18，Vertical displacement sensor 19 contacts pressurization disk 10；Be additionally provided with altitude mixture control electric cylinder bearing 22 in the outside of two balance columns 16, altitude mixture control electric cylinder bearing 22 is connected to altitude mixture control electric cylinder 20 by connecting bolt 21, and the extension bar of altitude mixture control electric cylinder 20 is connected with extension rod 34 by chain female connector 17；The two ends of crossbeam 14 are connected with extension rod 34 by clamp nut 15, intermediate shear box 5 is connected with B pull pressure sensor 26 by oscillating bearing 24, B ball pivot 25, B pull pressure sensor 26 one end is connected with the rotating shaft 29 of level pressurization electric cylinder 33, level pressurization electric cylinder 33 is arranged on slip up flange of rail seat 32 by level pressurization electric cylinder bearing 31, slide rail base 32 is arranged on sole plate 1 by horizontal slide rail 28, intermediate shear box 5 is provided with displacement infrared transmitter 23, slide rail base 32 is provided with displacement infrared receiver instrument 27；Sole plate 1 is additionally provided with switch board 2, switch board 2 controls the stroke adjustment of press perpendicular electric cylinder 13, altitude mixture control electric cylinder 20 and level pressurization electric cylinder 33, is loaded on the data collecting card of switch board 2 for gathering the real time data of vertical displacement sensor, A pull pressure sensor 11 and B pull pressure sensor 26 and processing.
It is respectively arranged with trapezoidal groove 35 between the shear box of three, described upper, middle and lower.
It is provided with tank 36 outside described down cut box.
The feature of the present invention:
1), instrument of the present invention be a kind of electric double-sided boxshear apparatus, be widely used, the strain controlling formula dual shear test of undisturbed soil sample, disturbed sample and soft rock, Stress Control formula dual shear test can be carried out.
2), the square cutouts box of instrument selection of the present invention 20cm × 20cm × 40cm test, shear box is larger in size, well improves the problem that small sample shear stress is concentrated, and the test data recorded can reflect the mechanical property of soil sample more realistically.
3), instrument of the present invention between the shear box of upper, middle and lower, be respectively provided with trapezoidal groove for installing steel ball, can effectively reduce the frictional dissipation in shear history.
4), instrument of the present invention outside down cut box, be provided with tank, the shear strength test of saturated sample can be carried out.
5), instrument of the present invention is provided with altitude mixture control electric cylinder, can promote overall to crossbeam and Vertical loading mechanism (include press perpendicular electric cylinder, ball pivot, pull pressure sensor, pressurization disk, hold column and bearing plate), and on sole plate, it is provided with horizontal slide rail, trapezoidal groove is had at down cut box, for installing steel ball, this design is easy to remove shear box entirety Vertical loading position, and convenient dress sample operates with unloading sample.
6), the pressure at right angle loading system of instrument of the present invention and horizontal shear loading system abandon original lever loading mechanism, the electric cylinder adopting service behaviour more reliable is further applied load, and it is furnished with S type pull pressure sensor, the true pressure and shearing that act on sample can be recorded.And electric cylinder pressue device compact conformation, lightweight, pollution-free, easy to maintenance, make whole instrument more succinct, it is to avoid hydraulic pressure or Pneumatic loading pipeline is complicated, be not easy to the shortcomings such as maintenance.Simultaneously electric cylinder has bigger load control scope, it is possible to realize being further applied load, the accurate control of shear rate, thus realizing Stress Control formula dual shear test and strain controlling formula dual shear test, has higher stability and reliability.
7), the vertical load of instrument of the present invention puts on sample by bearing plate, bearing column, pressurization disk, it is ensured that sample load in process of the test is uniformly distributed.
8), instrument of the present invention adopt shear box adpting flange connect upper and lower shear box and column respectively, make upper and lower shear box in shear history reach good fixed effect, it is thus achieved that shear strength parameter more accurately.
9), each parts of instrument of the present invention all adopt mechanical connection, the particularly convenient maintenance carrying out parts and replacing, for save use cost provide convenience.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is upper shear box 7 structural representation of the present invention.
Fig. 3 is intermediate shear box 5 structural representation of the present invention.
Fig. 4 is down cut box 4 structural representation of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention done detailed narration.
A kind of electric double-sided boxshear apparatus, including sole plate 1 for keeping the stability of whole instrument host, sole plate 1 is provided with down cut box 4, is mainly used in fixing tested sample lower end；Intermediate shear box 5 and upper shear box 7 it is followed successively by above down cut box 4, down cut box 4 and upper shear box 7 both sides are connected with the balance column 16 of both sides respectively through shear box adpting flange 3,6, the upper surface of upper shear box 7 is provided with bearing plate 8, for upper vertical pressure is applied to tested sample；Being provided with bearing column 9 on bearing plate 8, for effectively transmitting uniform pressure at right angle, bearing column 9 is provided above pressurization disk 10, is used for applying pressure at right angle, has uniform pressure distribution function；Pressurization disk 10 is provided above A pull pressure sensor 11, for measuring vertical pressure, the upper end of A pull pressure sensor 11 is connected with the extension bar of press perpendicular electric cylinder 13 by A ball pivot, and the balance column 16 of both sides is affixed by crossbeam 14, and crossbeam 14 plays the steady function of whole instrument；Altitude mixture control electric cylinder bearing 22 it is additionally provided with in the outside of two balance columns 16, altitude mixture control electric cylinder bearing 22 is connected to altitude mixture control electric cylinder 20 by connecting bolt 21, acting primarily as the effect of lifting bearing plate, the extension bar of altitude mixture control electric cylinder 20 is connected with extension rod 34 by chain female connector 17；The two ends of crossbeam 14 are connected with extension rod 34 by clamp nut 15, intermediate shear box 5 is connected with B pull pressure sensor 26 by oscillating bearing 24, B ball pivot 25, B pull pressure sensor 26 is used for measuring horizontal pressure, B pull pressure sensor 26 one end is connected with the rotating shaft 29 of level pressurization electric cylinder 33, rotating shaft 29, for support level pressurization electric cylinder 33, and there is the coaxial regulatory function of level；30 is fastening bolt, level pressurization electric cylinder 33 is arranged on slip up flange of rail seat 32 by level pressurization electric cylinder bearing 31, level pressurization electric cylinder bearing 31, connect for level pressurization electric cylinder and slide rail base, and can along slide rail base horizontal adjustment, level pressurization electric cylinder bearing 31 and slide rail base 32 connect by fastening bolt 30, slide rail base 32 is arranged on sole plate 1 by horizontal slide rail 28, intermediate shear box 5 is provided with displacement infrared transmitter 23 for launching infrared signal, slide rail base 32 is provided with displacement infrared receiver instrument 27, for receiving the infrared signal that displacement infrared transmitter 23 sends；Sole plate 1 is additionally provided with switch board 2, switch board 2 controls the stroke adjustment of press perpendicular electric cylinder 13, altitude mixture control electric cylinder 20 and level pressurization electric cylinder 33, is loaded on the data collecting card of switch board 2 for gathering the real time data of vertical displacement sensor, A pull pressure sensor 11 and B pull pressure sensor 26 and processing.
It is respectively provided with trapezoidal groove 35 between the shear box of three, described upper, middle and lower, is used for installing steel ball, reduce frictional force.
Being provided with tank 36 outside described down cut box, the purpose arranging tank is for saturated loess sample is carried out shearing test, to ensure that the moisture content of sample is stable in process of the test.
The operation principle of the present invention is:
This instrument can be used for undisturbed soil sample, disturbed sample and soft rock sample are carried out shear strength testing experiment, and whole process of the test includes the collection of sample after the installation of sample, the carrying out of test and test.
Sample is installed
Another of altitude mixture control electric cylinder 20 and symmetric position place is switched on power with type electric cylinder, make it start working, now crossbeam 14 and Vertical loading mechanism (by press perpendicular electric cylinder 13, A ball pivot 12, pull pressure sensor 11, pressurization disk 10, hold column 9, bearing plate 8 forms) promoted by entirety, when rising to the maximum lift displacement that namely extreme higher position reaches set by switch board 2, left and right sides altitude mixture control electric cylinder 20 quits work.Now can start the filling work of sample, translate out Vertical loading position by down cut box 4, intermediate shear box 5 and upper shear box 7 entirety along horizontal slide rail 28, the sample cut is positioned in shear box.After treating that sample fills, shear box entirety is retracted Vertical loading position along horizontal slide rail 28, it is determined that after good position, be connected fixing with down cut box 4 and upper shear box 7 respectively by shear box adpting flange 3 and 6.It is again started up altitude mixture control electric cylinder 20 to reverse, top load maintainer begins to decline, until electric cylinder 20 quits work when bearing plate 8 contacts with upper shear box 7, column 9 and bearing plate 8 connecting bolt are held in fastening, and install vertical displacement sensor stand 18 and vertical displacement sensor 19 in position shown in Fig. 1.
Process of the test
After the oscillating bearing 24 of horizontal addload mechanism (being made up of oscillating bearing 24, ball pivot 25, pull pressure sensor 26, rotating shaft 29, fastening bolt 30, level pressurization electric cylinder bearing 31, level pressurization electric cylinder 33) being attached with the ears sheet of intermediate shear box 5 with bolt, tighten fastening bolt 30, complete whole instrument to connect, shearing test can be carried out.
After formally starting test, first start press perpendicular electric cylinder 13 and move downward, apply a certain size pressure at right angle by test requirements document, pass sequentially through ball pivot 12, pull pressure sensor 11, pressurization disk 10, hold column 9, bearing plate 8 is transferred to sample.Secondly, start level pressurization electric cylinder 33, apply a certain size horizontal shear by test requirements document or set certain shear rate, pass sequentially through pull pressure sensor 26, ball pivot 25, oscillating bearing 24 reach intermediate shear box 5, it is achieved horizontal shear.Intermediate shear box 5 (as shown in Figure 2), upper shear box 7 (as shown in Figure 3) and down cut box 4 (as shown in Figure 4) have trapezoidal groove, for placing steel ball, it is easy to intermediate shear box 5 move along guide rail under horizontal shear effect relative to upper shear box 7 and down cut box 4, and reduce frictional resistance, to eliminate the test error that friction causes as far as possible.
In whole process of the test, the data of data collecting system Real-time Collection pull pressure sensor 11 and 26, vertical displacement sensor 19 and displacement infrared receiver instrument 27, and carry out data process.
Sample collection after test
After off-test, stop level pressurization electric cylinder 33 and press perpendicular electric cylinder 13, start altitude mixture control electric cylinder 20 and promote Vertical loading mechanism, separate the ears sheet of oscillating bearing 24 and intermediate shear box 5.Down cut box 4, intermediate shear box 5 and upper shear box 7 entirety are translated out Vertical loading position along horizontal slide rail 28, being easy to artificially separate three, upper, middle and lower shear box, sample state and the collecting scissors tangent plane sample of two shear surfaces of direct vision carry out physical and mechanical parameter test analysis.
Claims (3)
- null1. an electric double-sided boxshear apparatus，Including sole plate (1)，It is characterized in that，Sole plate (1) is provided with down cut box (4)，Intermediate shear box (5) and upper shear box (7) it is followed successively by above down cut box (4)，Down cut box (4) and upper shear box (7) both sides are respectively through shear box adpting flange (3、6) it is connected with the balance column (16) of both sides，The upper surface of upper shear box (7) is provided with bearing plate (8)，Bearing plate (8) is provided with bearing column (9)，Bearing column (9) is provided above pressurization disk (10)，Pressurization disk (10) is provided above A pull pressure sensor (11)，The upper end of A pull pressure sensor (11) is connected with the extension bar of press perpendicular electric cylinder (13) by A ball pivot，The balance column (16) of both sides is affixed by crossbeam (14)，Wherein the balance column (16) of side is provided with vertical displacement sensor (19) by vertical displacement sensor stand (18)，Vertical displacement sensor (19) contact pressurization disk (10)；It is additionally provided with altitude mixture control electric cylinder bearing (22) in the outside of two balance columns (16), altitude mixture control electric cylinder bearing (22) is connected to altitude mixture control electric cylinder (20) by connecting bolt (21), and the extension bar of altitude mixture control electric cylinder (20) is connected with extension rod (34) by chain female connector (17)；The two ends of crossbeam (14) are connected with extension rod (34) by clamp nut (15), intermediate shear box (5) is by oscillating bearing (24), B ball pivot (25) is connected with B pull pressure sensor (26), B pull pressure sensor (26) one end is connected with the rotating shaft (29) of level pressurization electric cylinder (33), level pressurization electric cylinder (33) is arranged in slip up flange of rail seat (32) by level pressurization electric cylinder bearing (31), slide rail base (32) is arranged on sole plate (1) by horizontal slide rail (28), intermediate shear box (5) is provided with displacement infrared transmitter (23), slide rail base (32) is provided with displacement infrared receiver instrument (27)；Sole plate (1) is additionally provided with switch board (2), switch board (2) controls the stroke adjustment of press perpendicular electric cylinder (13), altitude mixture control electric cylinder (20) and level pressurization electric cylinder (33), and the data collecting card being loaded on switch board (2) is used for gathering the real time data of vertical displacement sensor, A pull pressure sensor (11) and B pull pressure sensor (26) and processing.
- 2. the electric double-sided boxshear apparatus of one according to claim 1, it is characterised in that be respectively arranged with trapezoidal groove (35) between the shear box of three, described upper, middle and lower.
- 3. the electric double-sided boxshear apparatus of one according to claim 1, it is characterised in that described down cut box is outside equipped with tank (36).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610256976.4A CN105758738A (en) | 2016-04-22 | 2016-04-22 | Electric double-surface shear apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610256976.4A CN105758738A (en) | 2016-04-22 | 2016-04-22 | Electric double-surface shear apparatus |
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| CN105758738A true CN105758738A (en) | 2016-07-13 |
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| CN201610256976.4A Pending CN105758738A (en) | 2016-04-22 | 2016-04-22 | Electric double-surface shear apparatus |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389474A (en) * | 2017-08-02 | 2017-11-24 | 华北科技学院 | A kind of soil test direct shear apparatus |
| CN107917846A (en) * | 2017-11-01 | 2018-04-17 | 浙江大学 | Soil shear characteristic essence amount determining device and its assay method |
| CN108318354A (en) * | 2018-05-03 | 2018-07-24 | 中国科学院武汉岩土力学研究所 | Shear box, stress test method and device |
| CN109115632A (en) * | 2018-09-30 | 2019-01-01 | 河南理工大学 | The comprehensive shearing experiment device of anchoring body and its experimental method |
| CN110579397A (en) * | 2019-09-29 | 2019-12-17 | 太原理工大学 | portable restrictive double-sided shear strength test fixture and test method |
| CN111089781A (en) * | 2020-01-16 | 2020-05-01 | 中国科学院武汉岩土力学研究所 | Rock shear test equipment and direct shear test method for rock test block |
| CN113358493A (en) * | 2021-05-27 | 2021-09-07 | 西安石油大学 | Soil body shearing box, experiment system with same and method thereof |
| CN113740179A (en) * | 2021-08-27 | 2021-12-03 | 西安交通大学 | Multipurpose on-site shearing instrument and method |
| CN114235604A (en) * | 2022-02-23 | 2022-03-25 | 成都东华卓越科技有限公司 | Direct shear apparatus for soft rock |
| CN115266365A (en) * | 2022-09-28 | 2022-11-01 | 中国矿业大学(北京) | Device for simultaneously measuring stress field and real contact area in sliding process of contact surface |
| CN116046564A (en) * | 2022-11-16 | 2023-05-02 | 河海大学 | Bidirectional loading shear tester for measuring interface contact characteristics and test method |
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| JP2001201446A (en) * | 2000-01-19 | 2001-07-27 | Japan Science & Technology Corp | Small-sized automatic repeating one surface-shearing testing apparatus |
| CN201637641U (en) * | 2010-01-22 | 2010-11-17 | 长安大学 | Freezing-thawing circulated coarse-grained soil shearing test device |
| CN102680328A (en) * | 2011-12-07 | 2012-09-19 | 长安大学 | Electrical large strain control type ring shearing apparatus |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389474A (en) * | 2017-08-02 | 2017-11-24 | 华北科技学院 | A kind of soil test direct shear apparatus |
| CN107917846A (en) * | 2017-11-01 | 2018-04-17 | 浙江大学 | Soil shear characteristic essence amount determining device and its assay method |
| CN108318354A (en) * | 2018-05-03 | 2018-07-24 | 中国科学院武汉岩土力学研究所 | Shear box, stress test method and device |
| CN109115632B (en) * | 2018-09-30 | 2024-05-03 | 河南理工大学 | Anchoring body comprehensive shearing experiment device and experiment method thereof |
| CN109115632A (en) * | 2018-09-30 | 2019-01-01 | 河南理工大学 | The comprehensive shearing experiment device of anchoring body and its experimental method |
| CN110579397A (en) * | 2019-09-29 | 2019-12-17 | 太原理工大学 | portable restrictive double-sided shear strength test fixture and test method |
| CN110579397B (en) * | 2019-09-29 | 2021-10-22 | 太原理工大学 | Portable restrictive double-sided shear strength test fixture and test method |
| CN111089781A (en) * | 2020-01-16 | 2020-05-01 | 中国科学院武汉岩土力学研究所 | Rock shear test equipment and direct shear test method for rock test block |
| CN113358493A (en) * | 2021-05-27 | 2021-09-07 | 西安石油大学 | Soil body shearing box, experiment system with same and method thereof |
| CN113358493B (en) * | 2021-05-27 | 2024-06-14 | 西安石油大学 | Soil shearing box, experimental system with shearing box and method of experimental system |
| CN113740179A (en) * | 2021-08-27 | 2021-12-03 | 西安交通大学 | Multipurpose on-site shearing instrument and method |
| CN113740179B (en) * | 2021-08-27 | 2022-06-07 | 西安交通大学 | Multipurpose on-site shearing instrument and method |
| CN114235604A (en) * | 2022-02-23 | 2022-03-25 | 成都东华卓越科技有限公司 | Direct shear apparatus for soft rock |
| CN115266365A (en) * | 2022-09-28 | 2022-11-01 | 中国矿业大学(北京) | Device for simultaneously measuring stress field and real contact area in sliding process of contact surface |
| CN115266365B (en) * | 2022-09-28 | 2022-12-02 | 中国矿业大学(北京) | Device for simultaneously measuring stress field and real contact area in contact surface sliding process |
| CN116046564A (en) * | 2022-11-16 | 2023-05-02 | 河海大学 | Bidirectional loading shear tester for measuring interface contact characteristics and test method |
| CN116046564B (en) * | 2022-11-16 | 2023-08-18 | 河海大学 | Bidirectional loading shear tester for measuring interface contact characteristics and test method |
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Application publication date: 20160713 |
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