CN207964508U - A kind of circular pneumatic formula shear box three dimension stress direct shear apparatus - Google Patents
A kind of circular pneumatic formula shear box three dimension stress direct shear apparatus Download PDFInfo
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- CN207964508U CN207964508U CN201820032510.0U CN201820032510U CN207964508U CN 207964508 U CN207964508 U CN 207964508U CN 201820032510 U CN201820032510 U CN 201820032510U CN 207964508 U CN207964508 U CN 207964508U
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- test specimen
- shear
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- cartridge body
- lower box
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Abstract
The utility model discloses a kind of circular pneumatic formula shear box three dimension stress direct shear apparatus, including direct shear apparatus, the shear box of the direct shear apparatus includes lower box body and the upper cartridge body that is removably disposed in above lower box body, wherein, the test specimen slot for placing test specimen is offered in upper cartridge body, lower box body, it is respectively arranged with pressurized capsule in the test specimen slot of upper cartridge body, the test specimen slot of lower box body, the pressurized capsule is connect with air charging system respectively；When being inflated into pressurized capsule by air charging system, pressurized capsule expansion.The utility model, which is one kind, applying certain circumferential pressure to soil sample by circumferential compression system, to make soil sample be in the straight shear device of three-dimensional stress, shearing test is carried out using the utility model, the data measured can more realistically reflect mechanics parameter of the soil sample in practical geological environment.
Description
Technical field
The utility model is related to Geological Engineering technical fields, and in particular to a kind of measurement soil sample is anti-under the conditions of simulating confining pressure
Cut the circular pneumatic formula shear box three dimension stress direct shear apparatus of intensity.
Background technology
Most of destruction of engineering slope is caused by failure by shear, and it is Rock And Soil to accurately hold Rock And Soil strength characteristics
And the key of Analysis of Slope Stability.In the various test methods for measuring soil strength, indoor direct shear test is because of its operation letter
It is single, it is low-cost and be widely used.
Direct shear test is developed using Coulomb theories as theoretical foundation, is earliest and is most directly measured Rock And Soil
The test method of shearing strength.The shearing strength that direct shear test measures is under the conditions of different pressures, and the part of it soil body is to another
The possessed ultimate strength for resisting shearing, can be divided into Stress Control formula and strain controlling formula two when outer a part of soil body sliding
Kind, Stress Control formula is to apply constant horizontal shear to test specimen, measures its relevant shear displacement, is used for creep test, is measured
The long-term strength of soil；Strain controlling formula direct shear test is sheared by constant shear rate, its corresponding horizontal shearing stress is measured,
Conventional magnetic shear intensity for measuring soil.
The shapes and sizes of the shear box of common direct shear apparatus are fixation in laboratory at present, pass through application in shear history
Then different pressure at right angles applies horizontal shear force and is sheared, and then acquires shear strength parameter, but it does not consider that soil exists
The three-dimensional stress of underground, Gu Qisuo, which acquires parameter, can not really reflect the mechanical index of soil sample.
Invention content
The purpose of this utility model is to provide a kind of circular pneumatic formula shear box three dimension stress direct shear apparatus, to solve tradition
The problem of direct shear apparatus cannot really reflect in shearing test and effectively measure mechanics parameter of the soil sample under three-dimensional stress constraint.
In order to realize that above-mentioned task, the utility model use following technical scheme：
A kind of circular pneumatic formula shear box three dimension stress direct shear apparatus, including direct shear apparatus, the shear box packet of the direct shear apparatus
The upper cartridge body for including lower box body and being removably disposed in above lower box body, wherein offer and be used in upper cartridge body, lower box body
The test specimen slot for placing test specimen, pressurized capsule, the pressurization are respectively arranged in the test specimen slot of upper cartridge body, the test specimen slot of lower box body
Capsule is connect with air charging system respectively；When being inflated into pressurized capsule by air charging system, pressurized capsule expansion.
Further, the test specimen slot is in the straight slot of upper cartridge body, lower box body top and bottom, the straight slot
Mounting groove is offered on wall, the pressurized capsule is set in the mounting groove.
Further, the mounting groove is along the circumferential direction opened on the inner wall of the straight slot.
Further, it is provided with top plate at the top of the upper cartridge body, offers on top plate and connects with test specimen slot on upper cartridge body
Logical pressurization hole.
Further, the air charging system uses air compressor machine, and air inlet is separately installed on the upper cartridge body, lower box body
One end of valve, described two intake valves is connect with the pressurized capsule on the upper cartridge body, lower box body respectively, described two intake valves
The other end is connect by air inlet pipe with the air compressor machine respectively, and pressure gauge is equipped in air inlet pipe.
Further, the pressurized capsule includes backform, bed die and side form, wherein backform and bed die are circular ring shape
Structure, side form are tubular construction, backform, bed die outer circle be connected on the inner wall of the mounting groove, backform, bed die inner circle point
Top edge, the lower edge of the side form are not connected.
Further, the direct shear apparatus further includes mobile station, horizontal drive apparatus, level detection device and adds vertically
The bottom of pressure device, the mobile station is equipped with idler wheel, offers aqua storage tank at the top of mobile station, fixation is provided in aqua storage tank
Slot, the lower box body are removably mounted in fixing groove；
The horizontal drive apparatus is connect with the mobile station, and the level detection device is connect with upper cartridge body,
And horizontal drive apparatus, level detection device are located at the heteropleural of mobile station；The vertical pressue device is located at the upper of shear box
Side.
Further, the level detection device includes horizontal displacement meter and dynamometer, horizontal drive dress
It sets including straight line driving mechanism and handwheel.
Further, the vertical pressue device includes hydraulic device, and pressurization is provided on the output shaft of hydraulic device
The upper end of column, pressured column is equipped with vertical manometer, and the lower end of pressured column is provided with pressure transmission plate.
Further, it is located in the shear box at the top of test specimen and is provided with porous disc.
The utility model has following technical characterstic：
1. the utility model, which is one kind, applying certain circumferential pressure to soil sample by circumferential compression system, to make soil
Sample is in the straight shear device of three-dimensional stress, carries out shearing test using the utility model, the data measured can be more realistically
Reflect mechanics parameter of the soil sample in practical geological environment.
It is simple in structure, processing cost is low 2. each component is using mechanical connection in the utility model, it is easy to use, especially just
Just the maintenance and replacement for carrying out parts provide convenience to save use cost, are easy to promote and apply in production and teaching.
Description of the drawings
Fig. 1 is the overall structure diagram of the utility model；
Fig. 2 is the overlooking structure diagram of upper cartridge body part；
Fig. 3 is the axial schematic cross-sectional view of upper cartridge body part；
Figure label represents：1- air compressor machines, 2- pressure gauges, 3- air inlet pipe, 4- handwheels, 5- straight line driving mechanisms, 6- air inlets
Valve, 7-lower box bodies, 8-pressurized capsules, 81-backforms, 82-side forms, 83-bed dies, 9- pressured columns, 10- vertical manometers, 11-
Pressure transmission plate, 12-porous discs, 13-upper cartridge bodies, 14-mobile stations, 15-aqua storage tanks, 16-dynamometers, 17-horizontal displacement meters,
18-idler wheels, 19-test specimens, 20-test specimen slots, 21-mounting grooves, 22-top plates.
Specific implementation mode
The utility model provides a kind of circular pneumatic formula shear box three dimension stress direct shear apparatus, including direct shear apparatus, described
The shear box of direct shear apparatus includes lower box body 7 and the upper cartridge body 13 for being removably disposed in 7 top of lower box body, wherein upper cartridge body
13, the test specimen slot 20 for placing test specimen 19 is offered in lower box body 7, in the examination of the test specimen slot 20, lower box body 7 of upper cartridge body 13
Pressurized capsule 8 is respectively arranged in part slot 20, the pressurized capsule 8 is connect with air charging system respectively；When by air charging system to adding
When being inflated in pressure capsule 8, pressurized capsule 8 expands.
The direct shear apparatus of the utility model further includes mobile station 14, horizontal drive apparatus, level detection device and adds vertically
Pressure device, the bottom of the mobile station 14 are equipped with idler wheel 18, and the top of mobile station 14 offers aqua storage tank 15, in aqua storage tank 15
It is provided with fixing groove, the lower box body 7 is removably mounted in fixing groove；
The horizontal drive apparatus is connect with the mobile station 14, and the level detection device connects with upper cartridge body 13
It connects, and horizontal drive apparatus, level detection device are located at the heteropleural of mobile station 14；The vertical pressue device is located at shear box
Top.
Specifically, the mobile station 14 is used for and horizontal drive apparatus, level detection device coordinate, wherein level is driven
Straight line driving mechanism 5 can be used in dynamic device, and example straight line driving mechanism 5 as mentioned can be mutually matched rack-and-pinion, profit
Gear rotation is driven with handwheel 4, is moved with band carry-over bar, to promote rack that mobile station 14 is pushed to move.The horizontal drive
Dynamic device can also use various other mechanisms, such as electric telescopic rod, hydraulic telescopic rod, linear motor etc..Level detection
It includes horizontal displacement meter 17 and dynamometer 16 to device, and wherein horizontal displacement meter 17 is broken in generation shearing to record test specimen 19
The shear displacemant that two parts of test specimen 19 occur when bad, i.e. horizontal displacement between upper cartridge body 13, lower box body 7, and dynamometer 16
To record the shear stress suffered during failure by shear occurs of test specimen 19, at any time according to shearing force, shear displacemant
Variation, draw shearing force and shear displacemant graph of relation after the end of the test.The vertical pressue device includes hydraulic pressure
Device is provided with pressured column 9 on the output shaft of hydraulic device, and the upper end of pressured column 9 is equipped with vertical manometer 10, pressured column 9
Lower end be provided with pressure transmission plate 11, the top and bottom that test specimen 19 is located in the shear box are respectively arranged with porous disc
12；In experiment, pressure transmission plate 11 is contacted with the surface of porous disc 12, is applied pressure at right angle to test specimen 19 using hydraulic device, is led to
Cross the pressure at right angle suffered by the record test specimen 19 of vertical manometer 10；After the test, shearing force and 19 damage area of test specimen are utilized
The ratio between acquire shearing strength, then draw shearing strength and pressure at right angle graph of relation.
In experiment, dynamometer 16, horizontal displacement meter 17 are fixed, and are connect with upper cartridge body 13 so that the position of upper cartridge body 13
It sets and stablizes relatively；Lower box body 7 is connect with straight line driving mechanism 5, and lower box body 7 is removably attached in mobile station 14.Profit
The thrust for applying horizontal direction to mobile station 14 with straight line driving mechanism 5, since 13 position of upper cartridge body is relatively fixed, upper box
Relative motion will occur for body 13, lower box body 7 so that the test specimen 19 inside shear box is destroyed by shearing force, in this mistake
Cheng Zhong records data by level detection device, vertical pressue device.
In the present solution, test specimen 19 is positioned in the test specimen slot 20 in shear box, porous disc 12 is arranged in 19 top of test specimen.It is permeable
The effect of plate 12 is, under the action of pressure at right angle, the water in test specimen 19 will be oozed out by porous disc 12, is oozed out according to test specimen 19
Water can calculation testing piece 19 shear after water content, while moisture in test specimen 19 can also be avoided to cause shadow to test result
It rings.
As shown in Figure 1, Figure 2 and Figure 3, the shear box in this programme is made of upper cartridge body 13,7 two parts of lower box body, upper box
Offer the identical test specimen slot 20 of diameter on body 13, lower box body 7, test specimen slot 20 be through upper cartridge body 13,7 top surface of lower box body,
The cross section of the straight slot of bottom surface, straight slot is circular configuration.Upper cartridge body 13, lower box body 7 surface structure can be cuboid, such as scheme
2, shown in Fig. 3, i.e., the straight slot runs through cuboid upper and lower surface.At the trial, upper cartridge body 13 is placed on lower box body 7
Portion, and make upper cartridge body 13,20 co-axially align of test specimen slot on lower box body 7, test specimen 19 is then put into upper cartridge body 13, lower box body
In 7 straight slot.In the present solution, in order to simulate sample three-dimensional stress, to enable the data measured more realistically to reflect soil
Mechanics parameter of the sample in practical geological environment is provided with 8 structure of pressurized capsule.Pressurized capsule 8 upper cartridge body 13 test specimen slot 20, under
It is respectively set in the test specimen slot 20 of box body 7, and is connect with air charging system.When experiment, filled into pressurized capsule 8 using air charging system
Gas, pressurized capsule 8 are expanded, are squeezed test specimen 19, carry out shearing strength test to test specimen 19 in such a state, to more
In the three-dimensional stress of underground, the mechanics that the parameter finally acquired more can truly reflect soil sample refers to good simulation sample
Mark.
Optionally, mounting groove 21 is offered on the straight slot inner wall, the pressurized capsule 8 is set to the mounting groove
In 21.As shown in figure 3, for the ease of pressurized capsule 8 is arranged, this programme offers mounting groove on upper cartridge body 13,7 inner wall of lower box body
21；Specifically, the mounting groove 21 is along the circumferential direction opened on the inner wall of the straight slot, and the pressurized capsule 8 is then
Around the annular balloon of the mounting groove 21 inner wall setting.After test specimen 19 is put into shear box, 19 circumference of test specimen is by described
Pressurized capsule 8 wraps up, and after being inflated in pressurized capsule 8, squeezes 19 circumference of test specimen, thus simulates the three-dimensional stress of test specimen 19
State.
Specifically, as shown in figure 3, the pressurized capsule 8 includes backform 81, bed die 83 and side form 82, wherein backform 81
Be cirque structure with bed die 83, side form 82 is tubular construction, backform 81, bed die 83 outer circle be connected to the mounting groove
On 21 inner wall, backform 81, bed die 83 inner circle be separately connected the top edge of the side form 82, lower edge.Backform 81, bed die
83, the inner wall of side form 82 and the mounting groove 21 surrounds an expandable cavity jointly, described when which inflates
Backform 81, bed die 83 and side form 82 deform, and press to 19 surface of test specimen.Backform 81, bed die 83 and the side form 82 can be adopted
It is made of rubber material.
Further optionally, the annular balloon of the pressurized capsule 8 or a swimming life-buoy shape, the annular balloon is directly attached
It on 21 inner wall of mounting groove.
As shown in figure 3, the top of the upper cartridge body 13 is provided with top plate 22, offered on top plate 22 on upper cartridge body 13
The pressurization hole that test specimen slot 20 is connected to.The pressure transmission plate 11 is a circular slab, and in experiment, pressure transmission plate 11 passes through described add
Kong Bingyu porous discs 12 are pressed to contact.
Optionally, the air charging system uses air compressor machine 1, be separately installed on the upper cartridge body 13, lower box body 7 into
One end of air valve 6, described two intake valves 6 is connect with the pressurized capsule 8 on the upper cartridge body 13, lower box body 7 respectively, described two
The other end of intake valve 6 is connect by air inlet pipe 3 with the air compressor machine 1 respectively, and pressure gauge 2 is equipped in air inlet pipe 3.Make
Used time is first turned on air compressor machine 1, then opens two intake valves 6 respectively, is filled to the pressurized capsule 8 in upper cartridge body 13, lower box body 7
Gas；The pressure in current pressurized capsule 8 can be monitored by the pressure gauge 2 in air inlet pipe 3, waits for that pressure reaches the numerical value of test requirements document
When, you can start to test.
The utility model using air compressor machine 1 to constant air pressure is applied inside shear box, to make test specimen 19 be in certain
Confining pressure under the conditions of, simulate it in true three-dimensional stress, principle is simple, and flexible structure, operability is strong, experiment
It can apply different circumferential pressures by adjusting air pressure, readily satisfying various engineerings needs according to the demand of different confining pressures in the process
It asks.And porous disc 12 is equipped in the utility model shear box, internal moisture is discharged after being pressurized convenient for soil sample, avoids and test is tied
Fruit impacts.
Claims (10)
1. a kind of circular pneumatic formula shear box three dimension stress direct shear apparatus, including direct shear apparatus, which is characterized in that the direct shear apparatus
Shear box includes lower box body (7) and the upper cartridge body (13) being removably disposed in above lower box body (7), wherein upper cartridge body
(13), the test specimen slot (20) for placing test specimen (19) is offered in lower box body (7), in the test specimen slot of upper cartridge body (13)
(20), be respectively arranged with pressurized capsule (8) in the test specimen slot (20) of lower box body (7), the pressurized capsule (8) respectively with air charging system
Connection；When by air charging system inflation into pressurized capsule (8), pressurized capsule (8) expansion.
2. circular pneumatic formula shear box three dimension stress direct shear apparatus as described in claim 1, which is characterized in that the test specimen slot
(20) it is straight slot through upper cartridge body (13), lower box body (7) top and bottom, offers mounting groove on the straight slot inner wall
(21), the pressurized capsule (8) is set in the mounting groove (21).
3. circular pneumatic formula shear box three dimension stress direct shear apparatus as claimed in claim 2, which is characterized in that the mounting groove
(21) it is along the circumferential direction opened on the inner wall of the straight slot.
4. circular pneumatic formula shear box three dimension stress direct shear apparatus as described in claim 1, which is characterized in that the upper cartridge body
(13) it is provided with top plate (22) at the top of, is offered on top plate (22) and test specimen slot (20) is connected on upper cartridge body (13) pressurization
Hole.
5. circular pneumatic formula shear box three dimension stress direct shear apparatus as described in claim 1, which is characterized in that the inflation dress
It sets and uses air compressor machine (1), intake valve (6), described two air inlets are separately installed on the upper cartridge body (13), lower box body (7)
One end of valve (6) is connect with the pressurized capsule (8) on the upper cartridge body (13), lower box body (7) respectively, described two intake valves (6)
The other end connect respectively with the air compressor machine (1) by air inlet pipe (3), pressure gauge (2) is installed in air inlet pipe (3).
6. circular pneumatic formula shear box three dimension stress direct shear apparatus as claimed in claim 2, which is characterized in that the pressurized capsule
(8) include backform (81), bed die (83) and side form (82), wherein backform (81) and bed die (83) are cirque structure, side
Mould (82) be tubular construction, backform (81), bed die (83) outer circle be connected on the inner wall of the mounting groove (21), backform
(81), the inner circle of bed die (83) is separately connected the top edge of the side form (82), lower edge.
7. circular pneumatic formula shear box three dimension stress direct shear apparatus as described in claim 1, which is characterized in that the direct shear apparatus
Further include mobile station (14), horizontal drive apparatus, level detection device and vertical pressue device, the mobile station (14)
Bottom is equipped with idler wheel (18), offers aqua storage tank (15) at the top of mobile station (14), aqua storage tank is provided with fixing groove in (15), institute
The lower box body (7) stated is removably mounted in fixing groove；
The horizontal drive apparatus is connect with the mobile station (14), and the level detection device connects with upper cartridge body (13)
It connects, and horizontal drive apparatus, level detection device are located at the heteropleural of mobile station (14)；The vertical pressue device is located at shearing
The top of box.
8. circular pneumatic formula shear box three dimension stress direct shear apparatus as claimed in claim 7, which is characterized in that the horizontal inspection
It includes horizontal displacement meter (17) and dynamometer (16) to survey device, and the horizontal drive apparatus includes straight line driving mechanism (5)
And handwheel (4).
9. circular pneumatic formula shear box three dimension stress direct shear apparatus as claimed in claim 7, which is characterized in that it is described vertical plus
Pressure device includes hydraulic device, is provided with pressured column (9) on the output shaft of hydraulic device, and the upper end of pressured column (9) is equipped with vertical
Straight pressure gauge (10), the lower end of pressured column (9) is provided with pressure transmission plate (11).
10. circular pneumatic formula shear box three dimension stress direct shear apparatus as claimed in claim 7, which is characterized in that the shearing
It is located in box at the top of test specimen (19) and is provided with porous disc (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820032510.0U CN207964508U (en) | 2018-01-09 | 2018-01-09 | A kind of circular pneumatic formula shear box three dimension stress direct shear apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820032510.0U CN207964508U (en) | 2018-01-09 | 2018-01-09 | A kind of circular pneumatic formula shear box three dimension stress direct shear apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN207964508U true CN207964508U (en) | 2018-10-12 |
Family
ID=63732534
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820032510.0U Expired - Fee Related CN207964508U (en) | 2018-01-09 | 2018-01-09 | A kind of circular pneumatic formula shear box three dimension stress direct shear apparatus |
Country Status (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174317A (en) * | 2019-05-30 | 2019-08-27 | 水利部交通运输部国家能源局南京水利科学研究院 | Contact surface double direction shear experimental rig |
| CN112326458A (en) * | 2019-08-05 | 2021-02-05 | 张继红 | Capsule pressure shearing test method and tester |
-
2018
- 2018-01-09 CN CN201820032510.0U patent/CN207964508U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174317A (en) * | 2019-05-30 | 2019-08-27 | 水利部交通运输部国家能源局南京水利科学研究院 | Contact surface double direction shear experimental rig |
| CN112326458A (en) * | 2019-08-05 | 2021-02-05 | 张继红 | Capsule pressure shearing test method and tester |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181012 Termination date: 20190109 |
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| CF01 | Termination of patent right due to non-payment of annual fee |