CN203164062U - Multifunctional hydraulic consolidometer for geotechnical compression test - Google Patents
Multifunctional hydraulic consolidometer for geotechnical compression test Download PDFInfo
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- CN203164062U CN203164062U CN 201320089597 CN201320089597U CN203164062U CN 203164062 U CN203164062 U CN 203164062U CN 201320089597 CN201320089597 CN 201320089597 CN 201320089597 U CN201320089597 U CN 201320089597U CN 203164062 U CN203164062 U CN 203164062U
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Abstract
The utility model discloses a multifunctional hydraulic consolidometer for a geotechnical compression test. The consolidometer comprises a pressure loading device, an energy storage device and a sample test device sequentially connected end to end, wherein the energy storage device comprises a big energy storage and a small energy storage connected in series. A pressure adjusting device is arranged between the big and small energy storages. The pressure loading device, the energy storage device, the sample test device and the pressure adjusting device are independently connected with a data collecting system which is further connected to a data processing and displaying device through a data line. The consolidometer disclosed by the utility model is high in degree of automation, low in cost, small in influence by environmental influencing factor, low in noise, strong in expandability and small in occupied area, and the purposes of optimizing the industrial structure and reducing the staff number and the labor intensity with low energy consumption and high efficiency are realized.
Description
Technical field
The utility model relates to geotechnological compression test technology, specifically a kind of geotechnological compression test multifunction hydraulic consolidometer.
Background technology
Along with development of science and technology, arising of large hydropower station, dykes and dams, skyscraper all requires its basis that firm stability will be arranged.In engineering construction, soil is born different research objects according to the effect difference.When building house, bridge, road, dykes and dams at soil layer, soil is to support the load that buildings transmits, and at this moment soil is to be used as ground; When earthen structures such as build embankment, earth dam, soil is exactly to be used as building materials; In addition, as tunnel, culvert and hypogee etc., soil is as medium or environment around the buildings.
Foundation soil body in the engineering produces stress and distortion under the superstructure load action.The vertical direction distortion of ground is sedimentation.The distortion of the soil body or sedimentation are stable most important to engineering safety, are closely-related with the compression performance of soil.Soil body compressibility has comprised the content of two aspects: the one, the absolute size of compress variation, that is settling amount size, the 2nd, compression deformation over time, i.e. the problem of so-called soil solidifying.
Embankment in the road and bridge engineering also can produce compression deformation under gravity own and vehicular load effect.The sedimentation meeting of soil causes more or less influence to following aspect, as grade elevation reduce, the normal use of influence and potential safety hazards such as the minimizing of under-clearance, embankment cracking, Uneven road.Therefore, in order to ensure the safe handling of road and bridge engineering, need to determine the distortion size of foundation soil, also need to understand and estimate sedimentation development in time and the possibility that tends towards stability thereof.
Because many construction work accidents comprise the seriously sinking of building inclination, buildings, wall crazing and basis fracture etc., all are that compressibility height or the compressibility of soil is inhomogeneous, cause what the serious sedimentation of ground or non-uniform settling caused.
So consolidation test for foundation detects particularly importantly in the engineering, by its Mechanics Performance Testing to soil, is derived as the mechanics parameter that engineering design needs.
Nowadays the testing tool that soil sample is carried out consolidation test is divided into two kinds.A kind of is comparatively traditional manually the adding formula lever consolidometer that sticks together, and its advantage is not to be subjected to the influence of external condition, and shortcoming is that the instrument floor area is big, when increasing the weight of for each level of soil sample, all needs manually to remove and sticks together, adds and stick together.And the soil sample consolidation test of an exploratory hole does not wait from tens groups to up to a hundred groups, the soil sample of an exploration area will over thousands of group of sample, experiment work will drop into great amount of manpower and consolidation device, and lever consolidometer floor area is bigger, great restriction is caused in the space in laboratory, and the duration can cause when not being in a hurry a large amount of personnel, equipment, space idle, has increased business burden.And another kind is comparatively advanced vapour-pressure type consolidometer, its advantage is to take up an area of little, it is slightly low to work, general 3-4 people can finish a consolidation test, its principle is to use air pump to link to each other with cylinder to exert pressure for the force bearing plate of soil sample below, and the pressure by every grade of pressure regulator valve control, realized semi-automation.But its shortcoming is:
The top pressure of 1 air pump is limited, and testing apparatus can't be done high-potting.
The air compressor machine work irregularities of 2 air pumps can automatically start when air pressure is lower than limit value, can make people's psychology cause instantaneous anxiety, and has brought very big noise during air pump work, works long hours and can cause certain injury to human body under this environment.
3 gas pressure consolidation instrument leakage detection inconvenience, when finding gas leakage, need search one by one along whole pipeline with the self-control suds, caused a large amount of time lags, because test sample has strict time rule for every grade, if serious gas leakage takes place in process of the test, test can't normally be carried out, cause the soil sample mechanical property to change, the parameter distortion, design impacts to construction in later period.
It is more that 4 vapour-pressure type consolidometer are influenced by extraneous factor, and breaking down as power failure, pressure regulator valve, air compressor machine etc. all to make whole test work normally carry out or the test figure distortion, even causes great detection accident.
5 because the low restriction of air compressor machine output pressure, general vapour-pressure type consolidometer at most can be to 12 soil samples while load tests, and just need purchase many consolidometer when doing more various product, and dispose a plurality of air compressor machines, caused a large amount of noise pollutions and cost to have high input and floor area big.
Therefore, development can not be affected by the external environment, low noise and the multifunctional earth compression test that can realize the artificial intelligence applied voltage test be all test industry active demands with the multifunction hydraulic consolidometer.
The utility model content
The purpose of this utility model is to provide geotechnological compression test multifunction hydraulic consolidometer, the high and low cost of this system automation degree, the factor that is affected by the external environment is little, noise is low, extensibility is strong, floor area is little, realized optimizing the structure of production, reduce personnel amount and labour intensity, low energy consumption, high efficiency advantage purpose.
In order to reach above-mentioned purpose, the utility model provides following technical scheme: geotechnological compression test multifunction hydraulic consolidometer, comprise the pressure-loaded device of head and the tail connection successively, energy storage device, the sample testing device, described pressure-loaded device is connected to form in parallel by electric hydaulic test pump and artificial foot pump, carry the controllable pressure table on the electric hydaulic test pump, electric hydaulic test pump one end is connected with automatic switch valve, the other end is connected with water tank, artificial foot pump one end is connected by pressure line with digital display manometer and hand switch valve, and the other end is connected with water tank; Described big accumulator has a straight-through interface and a three-way interface, and straight-through interface is connected with the pressure-loaded device, and three-way interface is connected respectively on the six-way valve valve port and by connecting with manual pressure regulating valve and inserts on one of them six-way valve valve port of six-way valve; Little accumulator has two straight-through interfaces, a straight-through interface directly inserts on one of them six-way valve valve port of six-way valve, another straight-through interface links to each other with the sample testing device by always going into to press valve, also has one on the described six-way valve as the six-way valve valve port of drainage exhaust; Described sample testing device has many tests along separate routes, many simply connected consolidometer of every test branch route are composed in series, the simply connected consolidometer is fixed on the testing table by reaction frame, simply connected consolidometer bottom is the static load cylinder body, static load cylinder body circumference symmetric position is connected with monomer respectively and goes into to press valve and monomer blowdown valve, describedly go into to press valve to connect energy storage device, described blowdown valve is connected to water tank, enclose sliding contact with the dynamic load piston by sealing O in the static load cylinder body, the dynamic load piston can move up and down in the static load cylinder body, the dynamic load piston is threaded with the loading pallet of self top, place on the loading pallet and hold the sample dish, hold the sample dish one side rotatable fixed mount that is threaded, the dial gauge with data output function is clamped on the rotatable fixed mount, and the dial gauge chaining pin contacts with the displacement transiting rod; Described pressure-loaded device, energy storage device, sample testing device, regulator all are connected with data acquisition system (DAS) separately, and described data acquisition system (DAS) is connected to data by data line again and handles and display device.
Described energy storage device comprises big accumulator and the little accumulator that is cascaded, and is provided with regulator between above-mentioned two accumulators; Described regulator is divided into automatic pressure regulating device and hand-operated pressure regulation appliance, hand-operated pressure regulation appliance comprises manual pressure regulating valve, automatic pressure regulating device is made up of digital display intelligent instrument, solenoid valve and pressure transducer, the rearmounted interface of described digital display intelligent instrument is connected with pressure transducer with solenoid valve respectively, one of them six-way valve valve port of solenoid valve input port and six-way valve is connected, the solenoid valve delivery outlet is connected with the threeway short circuit, and all the other two interfaces of threeway short circuit are connected with pressure transducer respectively and are connected with little accumulator.
The described sample face of trying to get to the heart of a matter that holds arranges groove, makes the loading pallet just put into groove; Hold the sample face inboard of trying to get to the heart of a matter and also have groove, make in the big permeable stone standing groove, cutting ring is placed on the big permeable stone center, and test sample places in the cutting ring, and is contour with cutting ring.
Described cutting ring is annular hollow structure, little permeable stone is positioned on the test sample and just contacts with cutting ring inwall hollow structure, little permeable stone top is loam cake, last tops is semisphere, the sphere centre place has through hole and runs through the top and bottom of loam cake, and this through-bore axis is consistent with the central axis of loam cake.
The crossbeam center of described reaction frame is provided with through hole, and described displacement transiting rod contacts in reaction frame crossbeam and sample loam cake and with little permeable stone.
Compared to prior art, the utlity model has following beneficial effect:
1, automaticity height adopts the digital display intelligent instrument, and sample is carried out the Loading Control of corresponding time, adopts data collector, carries out the automatic collection of test data.
2, the factor that is affected by the external environment is little, is not had a power failure and the influence of device fails, has automatically and manual two cover detection systems.
3, low noise adopts the electric hydaulic test pump to carry out system's pressurization, has realized low noise.
4, low-cost, extensibility is strong, floor area is little, a plurality of simply connected consolidometer of can connecting, input cost is little, high efficiency.
5, leakage detection is convenient, has overcome the characteristics of air lift pump leakage detection inconvenience, and leak source is visual.
6, can apply high pressure, adopt the electric hydaulic test pump, realize that basic, normal, high pressure is integrated.
Specifically, the exert pressure device is composed in parallel by high pressure manual force (forcing) pump and electronic high pressure testing pump, can independently respectively carry out voltage supply to whole pipeline; Energy storage device is made of the accumulator of the reserves that vary in size, big accumulator is connected by pressure line with the pressure-loaded device, whole pipeline is carried out pressure compensation and energy storage, and little accumulator is connected with the sample testing device by the voltage supply pipeline, and sample testing is partly carried out pressure compensation and energy storage.Regulator is divided into digital display automatically and two kinds manually, connects in the pipeline by six-way valve, and input end is connected with big accumulator, and output terminal is connected with little accumulator, for the sample testing device provides controlled, steady accumulation of energy.Data acquisition system (DAS) is made up of the displacement transducer of computer, data cable concentrator, band data-interface, and the soil pressure contracting shift value that measures is deposited in the computer by the data cable concentrator.The utility model be mainly used in saturated soil low-in-the fixed compression test of high pressure, in addition in conjunction with digitizing measuring equipment and data collector, realized the automatic collection of test figure.
High pressure line and voltage supply pipeline pass through the screwed connection of controllable high-voltage pressure regulator valve at two ends; Voltage supply pipeline port links to each other with the sample testing device, and the sample testing device is composed in parallel by many branch testing platforms, and each branch testing platform is together in series by many consolidometer.Valve and blowdown valve are pressed in the consolidometer bottom for static load cylinder body, circumference symmetric position set into respectively, enclose sliding contact with the dynamic load piston by sealing O in the static load cylinder body, the dynamic load piston is connected with the loading dish is fixed by the pressure transmission bar, the dynamic load piston can move up and down in the static load cylinder body, realization is carried out pressurization and the pressure release of sample to the sample in the sample box on the loading dish by reaction frame, and sample shows by the dial gauge total indicator reading on the micrometer gauge bar brace table (displacement transiting rod) in the decrement of different time under the loads at different levels.Consolidation test test, the series connection pipeline is divided into voltage supply pipeline and pressure relief pipe, and screwed connection goes into to press valve and blowdown valve in consolidometer respectively.
Description of drawings
Fig. 1 is the structural representation that geotechnological compression test of the present utility model is used the multifunction hydraulic consolidometer.
Among the figure: 1, clock gauge; 2, dial framework; 3, reaction frame pillar; 4, hold the sample box; 5, loading pallet; 6, individual water intaking valve; 7, displacement transiting rod; 8, permeable stone; 9, static load cylinder body; 10, individual venting valve; 11, water inlet threeway; 12, dynamic load piston; 13, total water intaking valve; 14, little accumulator; 15, digital display intelligent instrument; 16, pressure transducer; 17, solenoid valve; 18, sample loam cake; 19, threeway short circuit; 20, cutting ring; 21,22,23,25,26,27, six-way valve valve port; 24, reaction frame is put the beams in place; 28, digital display manometer; 29, manual pressure regulating valve; 30, big accumulator; 31, hand switch valve; 32, artificial foot pump; 33, automatic switch valve; 34, controllable pressure table; 35, electric hydaulic test pump; 36, water tank; 37, data are handled and display device; 38, data collector; 39, data line; 40, earial drainage threeway; 41, the first branch line earial drainage main valve; 42, the second branch line earial drainage main valve; 43, first branch line water inlet main valve; 44, second branch line water inlet main valve; 45, total venting valve; 46, digital display manometer; 47, simply connected consolidometer; 48, worktable; 49, sealing O circle.
Embodiment
Relevant detailed description of the present utility model and technology contents, conjunction with figs. is described as follows, however accompanying drawing only provides the usefulness of reference with explanation, and the utility model is limited.
According to shown in Figure 1, geotechnological compression test multifunction hydraulic consolidometer comprises sample testing device, pressure-loaded device, energy storage device, regulator and data acquisition system (DAS).The pressure-loaded device is inserted in the pipeline with artificial foot pump 32 in parallel by electric hydaulic test pump 35 to be formed, carry controllable pressure table 34 on the electric hydaulic test pump 35, one end is connected with automatic switch valve 33, the other end is connected with water tank 36, artificial foot pump 32 1 ends and digital display manometer 46 and hand switch valve 31 are by the pressure line screwed connection, and the other end is connected with water tank 36; Big accumulator 30 has a straight-through interface and a three-way interface, straight-through interface is connected with the pressure-loaded device, energy storage device is made up of big accumulator 30 and little accumulator 14, big accumulator 30 has a straight-through interface and a three-way interface, straight-through interface is connected with the pressure-loaded device, three-way interface is connected respectively on the six-way valve valve port 25, with insert by connecting with manual pressure regulating valve 29 on the six-way valve valve port 26, little accumulator 14 has two straight-through interfaces, one is directly inserted on the six-way valve valve port 22, another with by always going into to press valve 13 series connection backs to link to each other with the sample testing device; Regulator is divided into automatic Regulation and manual voltage regulation, manual voltage regulation is made up of manual pressure regulating valve 29, automatic Regulation is made up of digital display intelligent instrument 15, solenoid valve 17 and pressure transducer 16, solenoid valve 17 1 ends are connected with six-way valve valve port 21, the other end and 19 screwed connections of threeway short circuit, threeway short circuit 19 all the other two interfaces respectively with pressure transducer 16 screwed connections, and connect together by pipeline with little accumulator 14; The sample testing device has many tests along separate routes, many simply connected consolidometer 47 of every test branch route are composed in series, simply connected consolidometer 47 is fixed on the testing table 48 by reaction frame 3 screw threads, the consolidometer bottom is static load cylinder body 9, the circumference symmetric position is connected with monomer respectively and goes into to press valve 6 and monomer blowdown valve 10, enclose 49 sliding contacts with dynamic load piston 12 by sealing O in the static load cylinder body 9, can in static load cylinder body 9, move up and down, dynamic load piston 12 is threaded with loading pallet 5, place on the loading pallet 5 and hold sample dish 4, the one side rotatable fixed mount 2 that is threaded, dial gauge 47 with data output function is clamped on the rotatable fixed mount 2, the dial gauge chaining pin contacts with displacement transiting rod 7, each is shown data line and converges on the data collector 38, sends on data processing and the display device 37 by data line again.
The described sample dish 4 that holds, the bottom surface is groove, can make loading pallet 5 just put into groove, holds inboard, sample dish 4 bottom surface and has groove, can make in the big permeable stone standing groove, and cutting ring is placed on the big permeable stone center, and test sample places in the cutting ring, and is contour with cutting ring.Described reaction frame 3, the crossbeam center is provided with through hole.The described test sample of making, place in the cutting ring, the cutting ring ring places on the big permeable stone, and it is annular hollow structure, and little permeable stone is positioned on the sample, can just contact with cutting ring inwall hollow structure, little permeable stone top is loam cake, and last tops is semisphere, and the sphere centre place has through hole, the top and bottom that runs through loam cake, and through hole is positioned on the central axis of loam cake.
Described displacement transiting rod 7 can contact with little permeable stone through reaction frame 3 crossbeams and sample loam cake.Described six-way valve mouth 23 is the drainage exhaust valve.Described digital display intelligent instrument 15 rearmounted interfaces are connected with pressure transducer 16 with solenoid valve 17, and solenoid valve 17 delivery outlets and sensor 16 are by the threeway screwed connection together.Can be by time in stage and the corresponding described electric hydaulic test pump 35 of force value of holding be set in the digital display intelligent instrument, the force value that can arrange by the controllable pressure table 34 that carries, the work of control electric hydaulic test pump with stop.
Operating process:
During detection, all need the sample for preparing put into and hold sample box 4, cover sample loam cake 18, displacement transiting rod 7 is passed with sample loam cake 18 tops and contacts from reaction frame 24 central small hole of putting the beams in place, rotate dial framework 2, clock gauge 1 indicator is contacted with displacement transiting rod 7 tops.
When adopting test automatically, close hand switch valve 31, open automatic switch valve 33, close six- way valve mouth 26,23, other valve port is opening.When adopting manual test, open hand switch valve 31, close automatic switch valve 33, close six- way valve mouth 21,25,23, other valve port is opening.
First kind of situation: when sample more for a long time, with total water intaking valve 13, total venting valve 45 and each branch line water inlet main valve 43,44, the total venting valve 41 of each branch line, 42, and each individual water intaking valve 6, venting valve 10 is opened, when adopting test automatically, regulating digital display intelligent instrument 15 is set pressure and corresponding voltage stabilizing time, and controllable pressure table 34, start electric hydaulic test pump 35 and be the pipeline water delivery, get rid of in the pipeline and the gas in each simply connected consolidometer 47 cylinder bodies, when no earial drainage main pipe rail is got rid of bubble in the water tank 36, close total venting valve 45, the total venting valve 41 of each branch line, 42, begin to detect, detect data and will be transferred to data collector 38 by data line 39, carry out the data storage and show by display device 37, after detection finishes, close electric hydaulic test pump 35, open total venting valve 45, the total venting valve 41 of each branch line, 42, carry out pressure release.
Second kind of situation: when sample more after a little while, with total water intaking valve 13, total venting valve 45 and branch line water inlet main valve 43, the total venting valve 41 of branch line, and need the individual water intaking valve 6 used on the branch line, venting valve 10 is opened, all the other branch line water inlet main valves 42, the total venting valve 44 of branch line, and the individual water intaking valve 6 that is not used on the branch line, venting valve 10 is closed, regulating digital display intelligent instrument 15 is set pressure and corresponding voltage stabilizing time, and controllable pressure table 34, starts electric hydaulic test pump 35 and carries out test experience.
The third situation: in testing process, when finding that certain simply connected consolidometer leaks, can be with individual water intaking valve 6, venting valve 10 is closed, and does not influence the test experience of other sample.
The 4th kind of situation: when meeting with power failure or open-air test experience, can adopt manual test experience, data are copied on paper record by the data of reaction on the clock gauge 1.
The above only is preferred embodiment of the present utility model, and non-in order to limit claim of the present utility model, other use the equivalence of patent spirit of the present utility model to change, and all should all belong to claim of the present utility model.
Claims (4)
1. geotechnological compression test multifunction hydraulic consolidometer, it is characterized in that, the pressure-loaded device, energy storage device, the sample testing device that comprise head and the tail connection successively, described pressure-loaded device is connected to form in parallel by electric hydaulic test pump and artificial foot pump, carry the controllable pressure table on the electric hydaulic test pump, electric hydaulic test pump one end is connected with automatic switch valve, the other end is connected with water tank, artificial foot pump one end is connected by pressure line with digital display manometer and hand switch valve, and the other end is connected with water tank; Described energy storage device comprises big accumulator and the little accumulator that is cascaded, and is provided with regulator between above-mentioned two accumulators; Described regulator is divided into automatic pressure regulating device and hand-operated pressure regulation appliance, hand-operated pressure regulation appliance comprises manual pressure regulating valve, automatic pressure regulating device is made up of digital display intelligent instrument, solenoid valve and pressure transducer, the rearmounted interface of described digital display intelligent instrument is connected with pressure transducer with solenoid valve respectively, one of them six-way valve valve port of solenoid valve input port and six-way valve is connected, the solenoid valve delivery outlet is connected with the threeway short circuit, and all the other two interfaces of threeway short circuit are connected with pressure transducer respectively and are connected with little accumulator; Described big accumulator has a straight-through interface and a three-way interface, and straight-through interface is connected with the pressure-loaded device, and three-way interface is connected respectively on the six-way valve valve port and by connecting with manual pressure regulating valve and inserts on one of them six-way valve valve port of six-way valve; Little accumulator has two straight-through interfaces, a straight-through interface directly inserts on one of them six-way valve valve port of six-way valve, another straight-through interface links to each other with the sample testing device by always going into to press valve, also has one on the described six-way valve as the six-way valve valve port of drainage exhaust; Described sample testing device has many tests along separate routes, many simply connected consolidometer of every test branch route are composed in series, the simply connected consolidometer is fixed on the testing table by reaction frame, simply connected consolidometer bottom is the static load cylinder body, static load cylinder body circumference symmetric position is connected with monomer respectively and goes into to press valve and monomer blowdown valve, describedly go into to press valve to connect energy storage device, described blowdown valve is connected to water tank, enclose sliding contact with the dynamic load piston by sealing O in the static load cylinder body, the dynamic load piston can move up and down in the static load cylinder body, the dynamic load piston is threaded with the loading pallet of self top, place on the loading pallet and hold the sample dish, hold the sample dish one side rotatable fixed mount that is threaded, the dial gauge with data output function is clamped on the rotatable fixed mount, and the dial gauge chaining pin contacts with the displacement transiting rod; Described pressure-loaded device, energy storage device, sample testing device, regulator all are connected with data acquisition system (DAS) separately, and described data acquisition system (DAS) is connected to data by data line again and handles and display device.
2. geotechnological compression test multifunction hydraulic consolidometer according to claim 1 is characterized in that, the described sample face of trying to get to the heart of a matter that holds arranges groove, makes the loading pallet just put into groove; Hold the sample face inboard of trying to get to the heart of a matter and also have groove, make in the big permeable stone standing groove, cutting ring is placed on the big permeable stone center, and test sample places in the cutting ring, and is contour with cutting ring.
3. geotechnological compression test multifunction hydraulic consolidometer according to claim 2, it is characterized in that, described cutting ring is annular hollow structure, little permeable stone is positioned on the test sample and just contacts with cutting ring inwall hollow structure, little permeable stone top is loam cake, last tops is semisphere, and the sphere centre place has through hole and runs through the top and bottom of loam cake, and this through-bore axis is consistent with the central axis of loam cake.
4. geotechnological compression test multifunction hydraulic consolidometer according to claim 1 is characterized in that, the crossbeam center of described reaction frame is provided with through hole, and described displacement transiting rod contacts in reaction frame crossbeam and sample loam cake and with little permeable stone.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320089597 CN203164062U (en) | 2013-02-27 | 2013-02-27 | Multifunctional hydraulic consolidometer for geotechnical compression test |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320089597 CN203164062U (en) | 2013-02-27 | 2013-02-27 | Multifunctional hydraulic consolidometer for geotechnical compression test |
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| CN203164062U true CN203164062U (en) | 2013-08-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749035A (en) * | 2015-03-18 | 2015-07-01 | 西北大学 | Loading device and method for soil triaxial apparatus |
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2013
- 2013-02-27 CN CN 201320089597 patent/CN203164062U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749035A (en) * | 2015-03-18 | 2015-07-01 | 西北大学 | Loading device and method for soil triaxial apparatus |
| CN104749035B (en) * | 2015-03-18 | 2017-03-29 | 西北大学 | A kind of earthwork triaxial apparatus charger and loading method |
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Granted publication date: 20130828 |