CN102221600A - Expansion force and saturated permeation multifunctional tester - Google Patents
Expansion force and saturated permeation multifunctional tester Download PDFInfo
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Abstract
The invention belongs to the technical field of geotechnical engineering and discloses an expansion force and saturated permeation multifunctional tester. The multifunctional tester comprises a permeation-expansion chamber (1), a temperature control baking box (2), a GDS (GrADS Data Server) water pressure/volume controller (4), a data acquisition instrument (5) and a sample pressing mold (3), wherein the permeation-expansion chamber (1) is formed in the temperature control baking box (2); the GDS water pressure/volume controller (4) is arranged outside the temperature control tank (2) and is connected with the permeation-expansion chamber (1) through a conduit (7); the data acquisition instrument (5) is arranged outside the temperature control baking box (2) and is connected with the permeation-expansion chamber (1) through a data line (6); and the sample pressing mold (3) has an independent structure and is arranged outside the temperature control baking box (2). Due to the adoption of the multifunctional tester, the integration of expansion force testing and permeation coefficient testing is realized.
Description
Technical field
The invention belongs to the Geotechnical Engineering technical field, be specifically related to a kind of bulging force and saturation multifunction test instrument.
Background technology
Expansion-pressure testing apparatus mainly is the bulging force that is used to study the argillaceous mineral material, and the saturation testing equipment mainly is the saturation permeability coefficient that is used to study soil.Existing expansion-pressure testing apparatus and saturation testing equipment only can be measured sample bulging force characteristic and infiltration coefficient at ambient temperature respectively, for then powerless the material that need carry out bulging force and permeability test under the higher temperature situation.Current research hot issue for example, the buffer that adopts in the dark geological disposal of the high-level waste storehouse---high compacting bentonitic clay need be tested under high temperature, low-permeability environment in the hope of the residing actual environment of bentonitic clay is simulated.
Existing test instrument rock expansion pressure tester comprises: nut; Plain washer; Crossbeam; The pendulum post; Joint; Pressure transducer; Top board; The metal porous disc; Test specimen; The collar; Adjuster; Container.Container comprises base plate and upper grooves, and it places expansion-pressure testing apparatus bottom, holding nut, plain washer, crossbeam, pendulum post, joint; Pressure transducer, top board, metal porous disc, test specimen, the collar; Adjustment part screws in container floor bottom margin place; The pendulum post screws in container floor top place; Test specimen places container upper grooves bottom; The metal porous disc is clipped in the test specimen two ends; Top board places the metal porous disc top on top; Pressure transducer places the top board top; Joint places the pressure transducer top; Augmentor places the joint top; Crossbeam is fixed on the pendulum post by nut, and is enclosed within outside the augmentor, the horizontal shift of restriction augmentor.This instrument component is many, complicated operation, and measuring accuracy is not high, artificial image data, it is limited to apply head pressure, and temperature control is limited.(the middle friendship second highway survey and design research institute is towards Chinese people republic industry standard-highway engineering rock test rules (JTG E41-2005) .2005,8,1:21-22.)
The saturation testing equipment mainly is the device of varying head test method(s), comprising: the head pipe of belt switch, and its sidewall is provided with scale; The transparent plastic tube, its sidewall top has aperture; Permeable stone.The head pipe of belt switch connects the bottom of transparent plastic tube, and sample is placed on the transparent plastic tube bottom, and permeable stone is clipped in sample top and low side.This Instrument measuring precision is not high, artificial image data, and it is limited to apply head pressure, and temperature control is limited.(Chen Zhongyi, Zhou Jingxing, Wang Hongjin. soil mechanics [M]. Beijing: publishing house of Tsing-Hua University, 1994.42-43.)
Summary of the invention
The object of the invention provides a kind of bulging force and saturation multifunction test instrument, solved the above-mentioned deficiency of conventional expansion-pressure testing apparatus and saturation testing equipment, can be used for high-temperature, the experimental study of soil expansion power and saturation permeability coefficient under the high water head pressure control.
Technical scheme of the present invention is as follows:
The invention provides a kind of bulging force and saturation multifunction test instrument, this multifunction test instrument comprises osmotic swelling chamber, temperature control baking oven, GDS hydraulic pressure/volume controller, data collecting instrument and pressure original mold tool; The osmotic swelling chamber places in the temperature control baking oven, and GDS hydraulic pressure/volume controller places outside the temperature control baking oven, connects the osmotic swelling chamber by conduit, and data collecting instrument places outside the temperature control baking oven, is connected with the osmotic swelling chamber by data line; Pressing the original mold tool is absolute construction, places outside the temperature control baking oven.
Described GDS hydraulic pressure/volume controller claims normal pressure/volume controller again, is that a general hydraulic pressure source and body become measuring instrument.Be mainly used in commercial and teaching soil mechanics laboratory, this instrument can be used as a constant-pressure source, replaces traditional experiment chamber pressure source, as mercury slug, pressurized air, oil pump, static load device.Also can be used as individual meter, the resolution 1mm of becoming
3In addition, instrument can be programmed by control panel, pressurizes or by the timeline variation according to slope and CYCLIC LOADING mode, and control volume becomes.This means that this device also is the ideal equipment of permeability test, can realize constant flow rate or constant head.
Further, described osmotic swelling chamber comprises base, sample ring, permeable stone, O-ring seal, stainless steel piston, steel cage, force transducer and solution bottle, and base side wall is provided with the hole, and the top is provided with annular water tank, the annular water tank bottom establishes the hole and areole runs through, and permeable stone is placed at the annular water tank top; Sample ring places on the base, and the outside that supplies to place sample, fixedly permeable stone, and sample ring for annular hollow structure is provided with O-ring seal; The stainless steel piston inserts in the sample ring, and its lower end contacts with permeable stone, and the sidewall of stainless steel piston and bottom be provided with through hole, and sidewall is provided with O-ring seal; Steel cage places on the base by rotation, and sidewall is provided with the hole; Force transducer places the steel cage top by rotation, and the bottom is pressed on the stainless steel piston; The set Kong Yiduan of base side wall connects GDS hydraulic pressure/volume controller, and bubble seals again in the other end eliminating base annular water tank; Stainless steel piston and the set hole of steel cage sidewall provide seepage channel; Osmotic swelling chamber entire body does not adopt bolt.
Described sample two ends are fixed with permeable stone.
Described temperature control baking oven comprises numerical control operating plate and baking oven, and the numerical control operating plate can accurately show, regulate temperature of oven; Baking oven, its shell is made by cold-rolled steel sheet, with ceramic fiber and rock wool filling, forms reliable thermofin between shell and the inner bag; Inner bag adopts steel plate or corrosion resistant plate, and inner bag bottom stainless steel tubulose electric heater is regulated the osmotic swelling room temperature, and range of control is 0-500 ℃, and precision is ± 0.1 ℃; The numerical control operating plate is placed in baking oven chamber door left side, connects the stainless steel tubulose electric heater of baking oven bottom by lead.
Described GDS hydraulic pressure/volume controller comprises step motor, screw drives bar, piston, cylinder, pressure transducer and digital current control panel, step motor is fixedly arranged on GDS hydraulic pressure/volume controller left upper end, screw drives bar one end is connected with step motor, and the other end is connected with piston; Piston places in the cylinder; Pressure transducer places the cylinder exit, and the digital current control panel is connected with pressure transducer.
Described data collecting instrument comprises LCDs and regulates button, regulates button and connect LCDs by data line; LCDs can show test figure in the process of the test; The adjusting button can be provided with initial value, the check test parameter of test figure.
Described pressure original mold tool comprises steel cushion block, stirrup, sample ring, steel bushing and squeeze piston, and the steel cushion block supports presses original mold tool superstructure, and stirrup places on the steel cushion block; Sample ring places in the stirrup annular hollow structure; Steel bushing places on the sample ring, and squeeze piston inserts in steel bushing and the sample ring, is pressed on the sample.
The present invention has realized bentonite inflated power of high compacting and the saturation permeability coefficient experimental study under high temperature, the high water head pressure control.Specifically comprise high water head pressure, the saturated bulging force test under the saturation test under the different temperatures control, the different temperatures control.Soil expansion power and Penetration Signature under the situation of different temperatures and high water head pressure are studied, in the hope of obtaining soil body osmotic coefficient and the bulging force Changing Pattern when high water head pressure, the different temperatures.
The present invention compares with prior art, has following advantage and beneficial effect:
(1) test instrument of the present invention has realized that bulging force is tested and infiltration coefficient is test integrated.
(2) test instrument of the present invention has been realized high temperature, high water head pressure control.
(3) test instrument of the present invention has been realized digitizing measurement and automatic data collection, and data precision is higher.
(4) test instrument test method of the present invention is easy.
(5) test instrument of the present invention, the cycle of designing and developing and manufacturing is short.
Description of drawings
Fig. 1 is bulging force of the present invention and saturation multifunction test instrument (remove and press the original mold tool) synoptic diagram.
Fig. 2 is an osmotic swelling of the present invention chamber synoptic diagram.
Fig. 3 is that the present invention presses original mold tool synoptic diagram.
Fig. 4 is GDS hydraulic pressure of the present invention/volume controller synoptic diagram.
Fig. 5 is a data collecting instrument synoptic diagram of the present invention.
Fig. 6 is a temperature control baking oven synoptic diagram of the present invention.
Fig. 7 represents that 20 ℃ and 40 ℃ high mausoleums bentonitic bulging forces of son are with the hydration time variation diagram.
Fig. 8 represents under the different temperatures the bentonitic infiltration coefficient of high mausoleum variation diagram in time.
Reference numeral:
Osmotic swelling chamber 1: base 11, sample ring 12, permeable stone 13, O-ring seal 14, stainless steel piston 15, steel cage 16, force transducer 17 and solution bottle 18.
Press original mold tool 3: steel cushion block 31, stirrup 32, sample ring 12, steel bushing 33 and squeeze piston 34.
GDS hydraulic pressure/volume controller 4: step motor 41, screw drives bar 42, piston 43, cylinder 44, pressure transducer 45 and digital current control panel 46.
Data collecting instrument 5: LCDs 51, regulate button 52;
Temperature control baking oven 2: numerical control operating plate 21, baking oven 22.
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawing illustrated embodiment.
Fig. 1 is the structure of bulging force of the present invention and saturation multifunction test instrument (remove and press the original mold tool).As shown in the figure, comprising: osmotic swelling chamber 1, temperature control baking oven 2, GDS hydraulic pressure/volume controller 4 and data collecting instrument 5.Osmotic swelling chamber 1 places in the temperature control baking oven 2, by the temperature of temperature control baking oven control osmotic swelling chambers 12; GDS hydraulic pressure/volume controller 4 places outside the temperature control baking oven 2, connects osmotic swelling chamber 1 by conduit 7, the water injection pressure and the water injection rate of control, monitoring osmotic swelling chamber 1; Data collecting instrument 5 places outside the temperature control baking oven 2, by data line 6 and osmotic swelling chamber 1 linkage record test figure.Pressing original mold tool 3 is absolute construction, places outside the temperature control baking oven 2.
Fig. 2 is the structure of osmotic swelling of the present invention chamber.As shown in the figure, osmotic swelling chamber 1, maximum outside diameter 130mm, height 183mm, its entire body adopts wearing quality stainless steel good and that rigidity is big to make, and comprising: base 11, sample ring 12, permeable stone 13, O-ring seal 14, stainless steel piston 15, steel cage 16, force transducer 17 and solution bottle 18; Base 11, its sidewall is provided with the hole, and the top is provided with annular water tank, and the annular water tank bottom establishes the hole and areole runs through, and permeable stone 13 is placed at the annular water tank top; Sample ring 12 places on the base 11, and its annular hollow structure supplies to insert sample 19, fixedly permeable stone 13, and sidewall is provided with O-ring seal 14; Stainless steel piston 15 inserts in the sample ring 12, and its lower end contacts with permeable stone 13, and sidewall and bottom are provided with through hole, sidewall placement O-ring seal 14; Steel cage 16 places on the sample ring 12 by rotation, 12 horizontal shifts of restriction sample ring, and its sidewall is provided with the hole; Force transducer 17 screws in steel cage 16 tops, and its bottom contacts with stainless steel piston 15, measures the sample bulging force; Solution bottle 18, it is connected with steel cage 16 areoles by conduit, for depositing deionized water; Sample 19, it respectively puts a permeable stone 13 up and down.The set Kong Yiduan of base 11 sidewalls connects GDS hydraulic pressure/volume controller 4, and bubble seals again in the other end eliminating base annular water tank.The hole of the correspondence that is provided with on stainless steel piston 15 and steel cage 16 sidewalls provides seepage channel.Osmotic swelling chamber 1 keeps working properly under 1.5MPa hydraulic pressure.
Fig. 3 presses the structure of original mold tool for the present invention, place outside the temperature control baking oven, as shown in the figure, its entire body adopts wearing quality stainless steel good and that rigidity is big to make, comprise steel cushion block 31, stirrup 32, sample ring 12, steel bushing 33 and squeeze piston 34: steel cushion block 31, it supports stirrup 32, sample ring 12, steel bushing 33 and squeeze piston 34, and can make the sample bottom surface smooth; Stirrup 32, it places on the steel cushion block 31, fixedly the position of sample ring 12; Sample ring 12, it places in stirrup 32 annular hollow structures; Steel bushing 33, it places on the sample ring 12, for inserting Powdered sample 35; Squeeze piston 34, it inserts in steel bushing 33 and the sample ring 12, is pressed on the Powdered sample 35.
Fig. 4 is the structure of GDS hydraulic pressure of the present invention/volume controller.As shown in the figure, comprising: step motor 41, screw drives bar 42, piston 43, cylinder 44, pressure transducer 45 and digital current control panel 46; Step motor 41, it is fixedly arranged on GDS hydraulic pressure/volume controller left upper end, can change by calculating the step number measurement volumes; Screw drives bar 42, the one end is connected with step motor 41, and the other end is connected with piston 43, transmits pressure; Piston 43, it places in the cylinder 44; Cylinder 44, it provides the horizontal shift passage for piston 43, deposits deionized water; Step motor 41 and screw drives bar 42 driven plunger 43 direct pressurized water; Pressure transducer 45, it places cylinder 44 exits, measures the water pressure of cylinder 44; Digital current control panel 46, it is connected by data line with pressure transducer 45, by closed-loop path regulating and controlling water pressure, can show current pressure value, body variate and the value of setting, can import goal pressure, target volume.It is 0-3MPa that GDS hydraulic controller 4 can apply hydraulic pressure, precision ± 1kPa.Can accurately write down simultaneously test water filling volume, precision ± 1mm
3In addition, when pressure and volume surpassed range, GDS hydraulic pressure/volume controller 4 had automatic protection functions.
Fig. 5 is the structure of data collecting instrument of the present invention.As shown in the figure, comprise LCDs 51, show test figure; Regulate button 52, it can be provided with initial value, check and correction parameter; Regulate button 52 and connect LCDs 51 by data line; Data collecting instrument has possessed the characteristics of real-time collection, storage automatically, instant playback, immediate feedback.
Fig. 6 is the structure of temperature control baking oven of the present invention.As shown in the figure, it comprises: numerical control operating plate 21, the temperature that it can show, regulate baking oven 22; Baking oven 22, its shell is made by cold-rolled steel sheet, with ceramic fiber and rock wool filling, forms reliable thermofin between shell and the inner bag; Inner bag adopts steel plate or corrosion resistant plate, inner bag bottom stainless steel tubulose electric heater, and its scalable osmotic swelling room temperature, range of control is 50-300 ℃, precision is ± 1 ℃; Numerical control operating plate 21 is placed in baking oven 22 chamber doors left side, connects the stainless steel tubulose electric heater of baking oven bottom by lead.
The using method of this test instrument:
At first suppress sample, under the fixed situation of sample dry density, taking by weighing the soil of deciding quality is 25mm to obtain radius, highly is the sample of 10mm; Steel cushion block 31 is placed on the pressing machine, and stirrup 32 places on the steel cushion block 31, fixedly the position of sample ring 12; Sample ring 12 places in the stirrup annular hollow structure; Steel bushing 33 places on the sample ring 12; Powdered sample 19 is poured in the hollow structure of steel bushing 33 and sample ring 12; Squeeze piston 34 inserts in steel bushing 33 and the sample ring 12, is pressed on the Powdered sample 19.The controlled pressure machine carries out classification compacting in 24 hours to Powdered sample 19; The sample 19 that compacting is good fully contacts with sample ring 12; According to shown in Figure 2, the order of osmotic swelling chamber 1 according to base 11, sample ring 12, sample 19, permeable stone 13, O-ring seal 14, stainless steel piston 15, steel cage 16, solution bottle 18 assembled successively; According to shown in Figure 1, osmotic swelling chamber 1 is placed in the temperature control baking oven 2, be connected with GDS hydraulic pressure/volume controller 4 by conduit 7, be connected with data collecting instrument 5 by data line 6, begin test.
During on-test, the temperature of temperature control baking oven 2 is made as 40 ℃, GDS hydraulic pressure/volume controller 4 is set the head pressure of initial 10KPa, and by the base 11 one ends injection deionized water of conduit 7 to osmotic swelling chamber 1, base 11 other ends are opened, wait to get rid of that bubble seals again in the base annular water tank, GDS hydraulic pressure/volume controller 4 keeps constant head pressure.Sample 19 in the sample ring 12 is met deionized water and is begun to expand, extruding stainless steel piston 15, bulging force is passed to force transducer 17, force transducer 17 measures the vertical bulging force of sample to be changed, data collecting instrument 5 record delta datas, when treating in the vertical bulging force of sample 6 hours no change, then reach steady state (SS); At this moment, the sample state that reached capacity.Subsequently, GDS hydraulic pressure/volume controller 4 changes and is made as the 1MPa head pressure, and keeps constant, writes down the water filling volume change simultaneously, by certain hour at interval in seepage flow cross the average water injection rate of sample transversal section water, according to the Darcy's law calculation permeability coefficient.The calculation permeability coefficient changing value is during less than 10-13, and seepage flow reaches steady state (SS); Then, temperature control baking oven 2 is regulated temperature step by step by 40 ℃-50 ℃-60 ℃-50 ℃-20 ℃, carries out infiltration coefficient and measures, treat under each grade temperature that infiltration coefficient is stable after, determine the corresponding saturation permeability coefficient of temperature at the corresponding levels, apply the next stage temperature again.Determine the Changing Pattern of sample saturation permeability coefficient under different temperatures at last.
Then, by pressing original mold tool 3 by above-mentioned compacting sample step, compacting same sample 19 is positioned over sample 19 in bulging force and the saturation multifunction test instrument by above-mentioned assembling sequence, begins test.
During on-test, the temperature of temperature control baking oven 2 is made as 20 ℃, GDS hydraulic pressure/volume controller 4 is set the head pressure of initial 10KPa, and by the base 11 one ends injection deionized water of conduit 7 to osmotic swelling chamber 1, base 11 other ends are opened, wait to get rid of that bubble seals again in the base annular water tank, GDS hydraulic pressure/volume controller 4 keeps constant head pressure.Force transducer 17 measures the vertical bulging force of samples to be changed, and data collecting instrument 5 record delta datas when treating in the vertical bulging force of sample 6 hours no change, then reach steady state (SS); Subsequently, at 40 ℃ of bulging force delta datas, obtain the Changing Pattern of sample bulging force under the different temperatures path by control sample.
Test findings as shown in Figure 7 and Figure 8.
Fig. 7 is the compacted dry density 1.7g/cm under 20 ℃ and 40 ℃
3The bentonitic bulging force test findings of high mausoleum.Fig. 7 shows that in the bentonitic clay saturation history, vertical compressive stress increased fast in the aquation incipient stage, when reaching first peak value, fell after rise, increases once more afterwards, until stable.Vertical compressive stress after stable is bulging force.This can be interpreted as, in the aquation phase one, the aggregate imbibition, under the lateral confinement condition, vertical compressive stress increases sharply, reach peak value after, soil skeleton occurs and cave in, certain falling after rise appears in differential expansion stress, each hole reorganization stresses re-distribution in the bentonitic clay.When aquation is proceeded, the end that heavily distributes of bentonitic clay internal void, with aquation deeply, part for aquation fully bentonitic clay cause that once more to a certain degree hole expands, vertical compressive stress enters strain.
It is relevant with the head that applies to influence bentonitic expansion rate, and head pressure is 0.1Kpa, and the obvious specific head pressure of the bulging force that temperature is 40 ℃ is 0.02Kpa, and it is fast that the bulging force that temperature is 20 ℃ increases.But changing, head pressure do not influence final bulging force.Test shows, the bentonitic clay saturation testing, and obtaining bulging force in the time of 40 ℃ is 3.41MPa, is 3.02MPa and obtain bulging force 20 ℃ the time.Bentonitic influence shows as temperature to high mausoleum, and temperature raises, and bentonite inflated power increases, and expansion character increases.The reason that this phenomenon produces was discussed at the 4th chapter, because the GMZ bentonitic clay is a sodium bentonite, Effect of Electric Double Layer accounts for leading, heated up to make interparticle double layer repulsion increase, thereby caused expansion character to increase.
Fig. 8 shows that calculation permeability coefficient has just begun to reach 1MPa during the stage at head pressure, changes in time obviously; At the 900th hour, when infiltration coefficient keeps stablizing, illustrate that the water yield of inflow, outflow sample keeps stable, the infiltration coefficient 2.75 * 10 of this moment
-13M/s is 1.7g/cm
3The saturation permeability coefficient of the sub-bentonitic clay in the high mausoleum of lateral confinement in the time of 40 ℃.To same sample, apply temperature by baking oven step by step by 40-50-60-50-20 ℃ path, obtaining temperature respectively is that 50,60,50,20 ℃ of pairing saturated number system numbers that ooze are respectively 3.41 * 10
-13M/s, 4.36 * 10
-13M/s, 3.36 * 10
-13M/s, 1.55 * 10
-13M/s.Be warming up to 50 ℃ of saturation permeability coefficients that record and be cooled to 50 ℃ of saturation permeability coefficients that record much at one.Illustrate that intensification and cooling path are little to the influence of the saturation under the same temperature.
Bulging force of the present invention and saturation multifunction test instrument mainly can be realized following test:
1, in the sample saturation history, by temperature control box sample is carried out classification and regulate temperature, make sample be in the state of different temperatures,, try to achieve the Changing Pattern of the vertical bulging force of sample under the different temperatures path by the variation of vertical bulging force in the force transducer determination test process.
2, under the abundant saturated situation of sample, by the temperature control baking oven temperature is regulated in the sample classification, make sample be in the state of different temperatures,, try to achieve the Changing Pattern of sample saturation permeability coefficient under the different temperatures path by the variation of calculation permeability coefficient in the GDS controller determination test process.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art are according to announcement of the present invention, and not breaking away from the improvement that category of the present invention makes and revise all should be within protection scope of the present invention.
Claims (7)
1. bulging force and saturation multifunction test instrument, it is characterized in that: this multifunction test instrument comprises osmotic swelling chamber (1), temperature control baking oven (2), GDS hydraulic pressure/volume controller (4), data collecting instrument (5) and presses original mold tool (3); Osmotic swelling chamber (1) places in the temperature control baking oven (2), GDS hydraulic pressure/volume controller (4) places outside the temperature control baking oven (2), connect osmotic swelling chamber (1) by conduit (7), data collecting instrument (5) places temperature control baking oven outer (2), is connected with osmotic swelling chamber (1) by data line (6); Pressing original mold tool (3) is absolute construction, places outside the temperature control baking oven (2).
2. bulging force according to claim 1 and saturation multifunction test instrument, it is characterized in that: described osmotic swelling chamber (1) comprises base (11), sample ring (12), permeable stone (13), O-ring seal (14), stainless steel piston (15), steel cage (16), force transducer (17) and solution bottle (18), base (11) sidewall is provided with the hole, the top is provided with annular water tank, the annular water tank bottom establishes the hole and areole runs through, and permeable stone (13) is placed at the annular water tank top; Sample ring (12) places on the base (11), and the outside that supplies to place sample (19), fixedly permeable stone (13), and sample ring (12) for annular hollow structure is provided with O-ring seal (14); Stainless steel piston (15) inserts in the sample ring (12), and its lower end contacts with permeable stone (13), and the sidewall and the bottom of stainless steel piston (15) be provided with through hole, and sidewall is provided with O-ring seal (14); Steel cage (16) places on the base (11) by rotation, and sidewall is provided with the hole; Force transducer (17) places steel cage (16) top by rotation, and the bottom is pressed on the stainless steel piston (15); The set Kong Yiduan of base (11) sidewall connects GDS hydraulic pressure/volume controller (4), and bubble seals again in the other end eliminating base annular water tank; Stainless steel piston (15) and the set hole of steel cage (16) sidewall provide seepage channel.
3. bulging force according to claim 2 and saturation multifunction test instrument is characterized in that: described sample (19) two ends are fixed with permeable stone (13).
4. bulging force according to claim 1 and saturation multifunction test instrument is characterized in that: described temperature control baking oven (2) comprises numerical control operating plate (21) and baking oven (22); Baking oven (22), its shell is made by cold-rolled steel sheet, with ceramic fiber and rock wool filling, forms thermofin between shell and the inner bag; Inner bag adopts steel plate or corrosion resistant plate, inner bag bottom stainless steel tubulose electric heater, and range of control is 0-500 ℃, precision is ± 0.1 ℃; Numerical control operating plate (21) is placed in baking oven (22) chamber door left side, connects the stainless steel tubulose electric heater of baking oven bottom by lead.
5. bulging force according to claim 1 and saturation multifunction test instrument, it is characterized in that: described GDS hydraulic pressure/volume controller (4) comprises step motor (41), screw drives bar (42), piston (43), cylinder (44), pressure transducer (45) and digital current control panel (46), step motor (41) is fixedly arranged on GDS hydraulic pressure/volume controller (4) left upper end, screw drives bar (42) one ends are connected with step motor (41), and the other end is connected with piston (43); Piston (43) places in the cylinder (44); Pressure transducer (45) places cylinder (44) exit, and digital current control panel (46) is connected with pressure transducer (45).
6. bulging force according to claim 1 and saturation multifunction test instrument, it is characterized in that: described data collecting instrument (5) comprises LCDs (51) and regulates button (52), regulates button (52) and connect LCDs (51) by data line.
7. bulging force according to claim 1 and saturation multifunction test instrument, it is characterized in that: described pressure original mold tool (3), comprise steel cushion block (31), stirrup (32), sample ring (12), steel bushing (33) and squeeze piston (34), steel cushion block (31) supports presses original mold tool (3) superstructure, and stirrup (32) places on the steel cushion block (31); Sample ring (12) places in stirrup (32) annular hollow structure; Steel bushing (33) places on the sample ring (12), and squeeze piston (34) inserts in steel bushing (33) and the sample ring (12), is pressed on the sample (35).
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