CN206161435U - Triaxial compression experiment device - Google Patents
Triaxial compression experiment device Download PDFInfo
- Publication number
- CN206161435U CN206161435U CN201621223663.0U CN201621223663U CN206161435U CN 206161435 U CN206161435 U CN 206161435U CN 201621223663 U CN201621223663 U CN 201621223663U CN 206161435 U CN206161435 U CN 206161435U
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- China
- Prior art keywords
- pressure
- sample
- balancing gate
- gate pit
- push rod
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a triaxial compression experiment device, vertical pneumatic cylinder (7) that are connected with the tube -shape of last sample cap (6) up end in its pressure chamber, the through -hole that extruder pressure roof board (1) middle part was seted up is worn to the pneumatic cylinder, and sliding seal is connected between the lateral surface of pneumatic cylinder and the through -hole inner wall, be equipped with piston (8) in the pneumatic cylinder, it has hydraulic oil to be located in the pneumatic cylinder to fill between piston (8) and the last sample cap (6), the up end of piston (8) is connected with loading piston rod (9) that are located vertical direction, and loading piston rod (9) upper end is connected with the advancing mechanism who vertically exerts pressure to loading piston rod (9), the up end department that lies in sample cap (6) in the pneumatic cylinder is equipped with and is used for measuring these pressure sensor (13) of locating hydraulic oil pressure. The utility model discloses the atress condition and the deviation actual stress condition between of minimize soil body sample in the experiment can be reached, the assurance is provided for the accuracy of triaxial compression experiment result.
Description
Technical field
The utility model is related to soil deformation, strength characteristics field of test instrument, more particularly to a kind of triaxial compression test
Device.
Background technology
Triaxial tests instrument is the earthwork test Instrument for testing soil deformation, strength characteristics, and triaxial compression test is to survey
A kind of method of fixed soil shearing strength.Triaxial apparatus is by balancing gate pit, axial loading system, applying ambient pressure system, hole
Water pressure measurement system etc. is constituted.Its basic functional principle is：Sample is fixed with by sample cap in pressure room, by pressure
Simulating the confined pressure load that the soil body is subject to, sample cap upper end is fixedly connected with loading and lives indoor addition liquid (predominantly water) confined pressure
Stopper rod, loading piston rod passes balancing gate pit's top board and is slidably matched with balancing gate pit's top board and is connected, and sets at the top of loading piston rod
There is tension-compression sensor, vertical load is simulated by axial loading system and is applied along the pressure for loading piston rod direction to tension-compression sensor
Power carries out the shearing strength test of the soil body.By sensor and pressure table record respectively to pressure size in test, by constantly adding
Pressure, most at last the soil body is damaged by pressure, by calculating the shearing strength for finally measuring the soil body.
In experiment, because sample cap and loading piston rod are fixed rigid connections (general employing is threadedly coupled),
Therefore it is more direct when loading force is transmitted to sample, easily cause sample and be subject to larger pressure in moment, this and nature
Earth stress typically relatively continues in boundary, slow situation is less consistent；In addition also easily because axial loading system and loading are lived
The disturbance of stopper rod causes sample inside the non-longitudinal vibrations stress that should not occur in experiment occur；Further, since loading piston rod
With certain cross-sectional area, therefore the pressure that sample cap is carried on sample upper surface when determining experiment original state is
It is no consistent with the confined pressure of sample, it is also desirable to be determined by necessary calculating, inconvenience is caused to experimenter.
How to the greatest extent disadvantages mentioned above will necessarily cause the deviation between soil body sample stressing conditions and soil body actual loading situation,
Amount reduces deviation therebetween, is the problem that engineers and technicians need research；Other traditional triaxial tests instrument
It is difficult to accurately measure the accurate dimension that soil body sample is compressed, even if relative complex structure can be also required to accurate measurement
To realize.
Utility model content
The purpose of this utility model is to overcome above-mentioned problems of the prior art, there is provided a kind of triaxial compression test dress
Put, reach the deviation reduced as far as possible between soil body sample stressing conditions in an experiment and actual loading situation, and by phase
The accurate dimension that measurement soil body sample is compressed is realized to simple structure.
The technical solution of the utility model is：A kind of triaxial compression test device, including balancing gate pit, the balancing gate pit includes
The side wall of tubular, the upper end and lower end of side wall are connected to balancing gate pit's top board and balancing gate pit's base plate, the side wall, pressure
Ceiling plate and balancing gate pit's base plate surround the pressure chamber inner space of closing；Balancing gate pit base plate upper surface is located in the pressure room
The lower sample cap for connecting sample lower end is fixed with, the upper examination for connecting sample upper end is additionally provided with below balancing gate pit's top board
Sample cap, the upper sample cap is connected with the force application mechanism that pressure is longitudinally applied to sample, and the force application mechanism is solid including lower end
Due to the hydraulic cylinder of the tubular being vertically arranged of upper sample cap upper surface, the hydraulic cylinder passes what balancing gate pit top board middle part opened up
Connection is slidingly sealed between through hole, and the lateral surface and through-hole wall of hydraulic cylinder；Piston is provided with the hydraulic cylinder, in hydraulic cylinder
Hydraulic oil is filled between piston and upper sample cap；The upper surface of the piston is connected with the loading work positioned at vertical direction
Stopper rod, loads piston rod upper end and is connected with the propulsive mechanism that pressure is longitudinally applied to loading piston rod；Position in the hydraulic cylinder
The first pressure sensor for measuring hydraulic oil pressure at this is provided with the upper end surface of upper sample cap.
It is preferred that the propulsive mechanism includes the push rod being vertically arranged, the lower end of the push rod is upper with loading piston rod
End is fixed, and wherein the axis of push rod coincides with the axis of loading piston rod；The top half of the push rod is provided with external screw thread, under
The first length scale is provided with half part along its longitudinal direction；Rotating cylinder is arranged with the push rod, wherein rotating cylinder inner surface is provided with and pushes away
The internal thread that external screw thread on bar matches, is threadedly coupled between push rod and rotating cylinder；The upper end of the rotating cylinder and fixed mount
Upper end is hinged, and rotating cylinder can be rotatable around its axis by pin joint；The second length is circumferentially with the lower port of the rotating cylinder along it
Degree scale；The lower end of the push rod is fixed with the left end of transverse bar, and the right end of transverse bar is opened up with the longitudinal direction of fixed mount
Slide connects；The holding handle for rotating rotating cylinder is additionally provided with the rotating cylinder.
It is preferred that the lower end of the fixed mount is fixed on balancing gate pit's top board.
It is preferred that being fixedly connected by tension-compression sensor between the lower end of the push rod and the upper end of loading piston rod.
It is preferred that the loading upper cover of piston rod is provided with guide cylinder, the guide cylinder is fixed on support, and the support is consolidated
On balancing gate pit's top board.
It is preferred that the pressure chamber inner space is provided with second pressure sensor.
The beneficial effects of the utility model：In the utility model embodiment, there is provided a kind of triaxial compression test device, the dress
The upper sample cap put is provided with hydraulic cylinder and hydraulic piston, applies pressure to piston by promoting piston rod, so as to indirectly make
Upwards sample cap applies along the longitudinal power of sample hydraulic oil in hydraulic cylinder, due to transmitting pressure by liquid, therefore is applied
Power it is gently and more constant, and horizontal perturbed force will not be produced, so as to avoid prior art directly using being rigidly connected
Loading piston rod sample cap and sample applying power upwards defect；Can be at any time by the first pressure sensor in hydraulic cylinder
The pressure that force application mechanism is put on sample cap is measured, as long as and force application mechanism to be put on the pressure adjustment on upper sample cap
It is equal with the pressure of pressure indoor liquid to the pressure measured by first pressure sensor, you can to know sample in experiment initial shape
The pressure (ignoring the weight of upper sample cap) consistent with the confined pressure of sample that upper sample cap is carried on sample upper surface during state.And this
Utilization micrometer caliper designed on the push rod of utility model surveys the structure that long principle measures advance distance, can accurately survey
Measure the length that sample is longitudinally compressed at it.Therefore, the utility model can reach and reduce soil body sample in an experiment as far as possible
Stressing conditions and actual loading situation between deviation, and the vertical of measurement soil body sample is realized by relatively simple structure
To the effect of the accurate dimension for being compressed, the accuracy for triaxial compression test result provides guarantee.
Description of the drawings
Fig. 1 is structural representation of the present utility model.
Description of reference numerals：
1st, balancing gate pit's top board；2nd, side wall；3rd, balancing gate pit's base plate；4th, lower sample cap；5th, sample；6th, upper sample cap；7th, hydraulic pressure
Cylinder；8th, piston；9th, piston rod is loaded；10th, guide cylinder；11st, support；12nd, holding wire；13rd, first pressure sensor；14th, second
Pressure sensor；15th, fixed mount；16th, handle is held；17th, the second length scale；18th, push rod；19th, rotating cylinder；20th, the first length
Scale；21st, chute；22nd, transverse bar.
Specific embodiment
Below in conjunction with the accompanying drawings, a specific embodiment of the present utility model is described in detail, it is to be understood that this
The protection domain of utility model is not limited by specific embodiment.
As shown in figure 1, the utility model embodiment provides a kind of triaxial compression test device, including balancing gate pit, it is described
Balancing gate pit includes the side wall 2 of tubular, and the upper end and lower end of side wall 2 are connected to balancing gate pit's top board 1 and balancing gate pit's base plate
3, the side wall 2, balancing gate pit's top board 1 and balancing gate pit's base plate 3 surround the pressure chamber inner space of closing；Position in the pressure room
The lower sample cap 4 for connecting the lower end of sample 5 is fixed with the upper surface of balancing gate pit's base plate 3, the lower section of balancing gate pit's top board 1 is additionally provided with
For connecting the upper sample cap 6 of the upper end of sample 5, the upper sample cap 6 is connected with the force application mechanism that pressure is longitudinally applied to sample 5
Connect, the force application mechanism is fixed on the hydraulic cylinder 7 of the tubular being vertically arranged of the upper upper surface of sample cap 6, the liquid including lower end
Cylinder pressure 7 passes the through hole that the middle part of balancing gate pit's top board 1 opens up, and the company of being slidingly sealed between the lateral surface and through-hole wall of hydraulic cylinder 7
Connect；It is provided with piston 8, hydraulic cylinder 7 to be located between piston 8 and upper sample cap 6 in the hydraulic cylinder 7 and is filled with hydraulic oil；It is described
The upper surface of piston 8 is connected with the loading piston rod 9 positioned at vertical direction, and the loading upper end of piston rod 9 is vertical with to loading piston rod 9
It is connected to stressed propulsive mechanism is applied；Upper end surface in the hydraulic cylinder 7 positioned at upper sample cap 6 is provided with for measuring this
The first pressure sensor 13 of place's hydraulic oil pressure；Inside the pressure values measured by first pressure sensor 13, balancing gate pit
Confined pressure value and the data such as piston area can learn that propulsive mechanism loads on the pressure value on sample cap 6, it is concrete to calculate
As a result it is easy to draw by prior art, here is omitted.
The upper sample cap of the present embodiment is provided with hydraulic cylinder and hydraulic piston, applies to press to piston by promoting piston rod
Power, so as to indirectly make the hydraulic oil in hydraulic cylinder, upwards sample cap is applied along the longitudinal power of sample, due to being transmitted by liquid
Pressure, therefore the power for being applied is gently and more constant, and horizontal perturbed force will not be produced, it is straight so as to avoid prior art
Connect the defect using rigidly connected loading piston rod sample cap and sample applying power upwards；By the first pressure in hydraulic cylinder
Sensor can at any time measure the pressure that force application mechanism is put on sample cap, as long as and force application mechanism is put on into upper sample
It is equal with the pressure of pressure indoor liquid that pressure on cap is adjusted to the pressure measured by first pressure sensor, you can knows examination
Sample when original state is tested on the pressure that is carried on sample upper surface of sample cap is consistent with the confined pressure of sample (ignores upper sample
The weight of cap and piston cylinder, the comparison that can be done under the prior art due to both parts is light and thin, therefore can ignore it
Weight is to the pressure produced by sample upper surface).
Further, the propulsive mechanism includes the push rod 18 being vertically arranged, lower end and the loading piston of the push rod 18
The upper end of bar 9 is fixed, and wherein the axis of push rod 18 coincides with the axis of loading piston rod 9；The top half of the push rod 18
External screw thread is provided with, the first length scale 20 is provided with along its longitudinal direction on the latter half；Rotating cylinder 19 is arranged with the push rod 18, wherein
The inner surface of rotating cylinder 19 is provided with the internal thread matched with the external screw thread on push rod 18, is threadedly coupled between push rod 18 and rotating cylinder 19；
The upper end of the rotating cylinder 19 is hinged with the upper end of fixed mount 15, and rotating cylinder 19 can be rotatable around its axis by pin joint；It is described
The second length scale 17 is circumferentially with the lower port of rotating cylinder 19 along it；The lower end of the push rod 18 is consolidated with the left end of transverse bar 22
Fixed, the chute 21 that the right end of transverse bar 22 is opened up with the longitudinal direction of fixed mount 15 is slidably connected；It is additionally provided with the rotating cylinder 19
For rotating the holding handle 16 of rotating cylinder 19.Drum rotation can be made by rotating holding handle, so as in threaded function lower band
Dynamic push rod is moved downward, so as to impose downward power to loading piston rod.The structure of advance distance is measured between push rod and rotating cylinder
Design make use of micrometer caliper to survey long principle, therefore, it is possible to the distance that accurate measurement push rod is advanced, so can be accurate
Draw the length that sample is longitudinally compressed at it.
Further, the lower end of the fixed mount 15 is fixed on balancing gate pit's top board 1.
Further, guide cylinder 10 is arranged with the loading piston rod 9, the guide cylinder 10 is fixed on support 11,
The support 11 is fixed on balancing gate pit's top board 1.
Further, the pressure chamber inner space is provided with second pressure sensor 14.First pressure sensor 13 and
Two pressure sensors 14 are received by holding wire 12 and external signal and process instrumentation is electrically connected.
Further, fixed by tension-compression sensor between the upper end of the lower end of the push rod 18 and loading piston rod 9 and connected
Connect.First pressure sensor itself can measure the pressure for being carried in sample cap 6, a tension-compression sensor is further added by herein then many
One pressure measurement approach, can test out the stress on push rod top.
In sum, a kind of triaxial compression test device that the utility model embodiment is provided, the upper sample cap of the device
Hydraulic cylinder and hydraulic piston are provided with, apply pressure to piston by promoting piston rod, so as to indirectly make the liquid in hydraulic cylinder
The force feed power that upwards sample cap applies along sample longitudinal direction, due to transmitting pressure by liquid, therefore the power for being applied gently and compared with
For constant, and horizontal perturbed force will not be produced, so as to avoid prior art rigidly connected loading piston rod is directly used
The defect of sample cap and sample applying power upwards；Force application mechanism can at any time be measured by the first pressure sensor in hydraulic cylinder
The pressure on sample cap is put on, as long as and the pressure that force application mechanism is put on upper sample cap being adjusted into first pressure and being passed
Pressure measured by sensor is equal with the pressure of pressure indoor liquid, you can sample cap on knowing sample when original state is tested
The pressure being carried on sample upper surface (ignoring the weight of upper sample cap) consistent with the confined pressure of sample.And of the present utility model push away
Utilization micrometer caliper designed on bar surveys the structure that long principle measures advance distance, can accurately measure sample at it
The length that longitudinal direction is compressed.Therefore, the utility model can reach reduce as far as possible soil body sample stressing conditions in an experiment with
Deviation between actual loading situation, and the essence that the longitudinal direction of measurement soil body sample is compressed is realized by relatively simple structure
The effect of true size, the accuracy for triaxial compression test result provides guarantee.
Disclosed above is only several specific embodiments of the present utility model, but, the utility model embodiment not office
It is limited to this, the changes that any person skilled in the art can think of should all fall into protection domain of the present utility model.
Claims (6)
1. a kind of triaxial compression test device, including balancing gate pit, the side wall (2) of the balancing gate pit including tubular, side wall (2) it is upper
End and lower end are connected to balancing gate pit's top board (1) and balancing gate pit's base plate (3), the side wall (2), balancing gate pit's top board (1)
And balancing gate pit's base plate (3) surrounds the pressure chamber inner space of closing；Balancing gate pit's base plate (3) upper surface is located in the pressure room
The lower sample cap (4) for connecting sample (5) lower end is fixed with, balancing gate pit's top board is additionally provided with for connecting sample below (1)
(5) the upper sample cap (6) of upper end, the upper sample cap (6) is connected with the force application mechanism that pressure is longitudinally applied to sample (5),
Characterized in that, the force application mechanism is fixed on the hydraulic pressure of the tubular being vertically arranged of upper sample cap (6) upper surface including lower end
Cylinder (7), the hydraulic cylinder (7) passes the through hole that balancing gate pit's top board (1) middle part opens up, and the lateral surface and through hole of hydraulic cylinder (7)
Connection is slidingly sealed between inwall；It is provided with the hydraulic cylinder (7) in piston (8), hydraulic cylinder (7) and is located at piston (8) and upper examination
Hydraulic oil is filled between sample cap (6)；The upper surface of the piston (8) is connected with the loading piston rod (9) positioned at vertical direction,
Loading piston rod (9) upper end is connected with the propulsive mechanism that pressure is longitudinally applied to loading piston rod (9)；The hydraulic cylinder (7)
The interior upper end surface positioned at upper sample cap (6) is provided with the first pressure sensor (13) for measuring hydraulic oil pressure at this.
2. a kind of triaxial compression test device as claimed in claim 1, it is characterised in that the propulsive mechanism includes vertically setting
The push rod (18) put, the lower end of the push rod (18) is fixedly connected with the upper end of loading piston rod (9), wherein the axle of push rod (18)
Line coincides with the axis of loading piston rod (9)；The top half of the push rod (18) is provided with external screw thread, along it on the latter half
Longitudinal direction is provided with the first length scale (20)；Rotating cylinder (19) is arranged with the push rod (18), wherein rotating cylinder (19) inner surface is provided with
The internal thread matched with the external screw thread on push rod (18), is threadedly coupled between push rod (18) and rotating cylinder (19)；The rotating cylinder
(19) upper end is hinged with the upper end of fixed mount (15), and rotating cylinder (19) can be rotatable around its axis by pin joint；Described turn
The second length scale (17) is circumferentially with the lower port of cylinder (19) along it；The lower end of the push rod (18) and transverse bar (22)
Left end is fixed, and the chute (21) that the right end of transverse bar (22) is opened up with the longitudinal direction of fixed mount (15) is slidably connected；Described turn
The holding handle (16) for rotating rotating cylinder (19) is additionally provided with cylinder (19).
3. a kind of triaxial compression test device as claimed in claim 2, it is characterised in that the lower end of the fixed mount (15) is consolidated
On balancing gate pit's top board (1).
4. a kind of triaxial compression test device as claimed in claim 2, it is characterised in that the lower end of the push rod (18) with plus
It is fixedly connected by tension-compression sensor between the upper end for carrying piston rod (9).
5. a kind of triaxial compression test device as claimed in claim 1, it is characterised in that cover on the loading piston rod (9)
Guide cylinder (10) is provided with, the guide cylinder (10) is fixed on support (11), and the support (11) is fixed on balancing gate pit's top board (1)
On.
6. a kind of triaxial compression test device as claimed in claim 1, it is characterised in that the pressure chamber inner space is provided with
Second pressure sensor (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621223663.0U CN206161435U (en) | 2016-11-11 | 2016-11-11 | Triaxial compression experiment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621223663.0U CN206161435U (en) | 2016-11-11 | 2016-11-11 | Triaxial compression experiment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206161435U true CN206161435U (en) | 2017-05-10 |
Family
ID=58658744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621223663.0U Expired - Fee Related CN206161435U (en) | 2016-11-11 | 2016-11-11 | Triaxial compression experiment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206161435U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL425024A1 (en) * | 2018-03-26 | 2019-10-07 | Politechnika Poznańska | Device for testing of side thrusts |
-
2016
- 2016-11-11 CN CN201621223663.0U patent/CN206161435U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL425024A1 (en) * | 2018-03-26 | 2019-10-07 | Politechnika Poznańska | Device for testing of side thrusts |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170510 Termination date: 20211111 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |