CN109633131A - The soft rock matric suction balancing device and matric suction measurement method of controllable temperature pressure control - Google Patents
The soft rock matric suction balancing device and matric suction measurement method of controllable temperature pressure control Download PDFInfo
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- CN109633131A CN109633131A CN201910086932.5A CN201910086932A CN109633131A CN 109633131 A CN109633131 A CN 109633131A CN 201910086932 A CN201910086932 A CN 201910086932A CN 109633131 A CN109633131 A CN 109633131A
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Abstract
The invention discloses a kind of soft rock matric suction balancing device of controllable temperature pressure control and matric suction measurement methods, the device includes pedestal, pedestal is equipped with the temperature-controlling chamber for placing soft rock sample, temperature-controlling chamber is the cylindrical pressure vessel of three-layer composite structure, the upper port of temperature-controlling chamber is equipped with round cover, the top center of round cover is embedded with force transmitting board, and force transmitting board is equipped with the compression load disk of protrusion；Force transmission mechanism includes gear and strut, the side of strut is equipped with tooth socket, and gear and tooth socket are intermeshed, and the lower end of strut is connected with the telescopic rod that can be stretched in vertical direction, the telescopic head and digital display pressure gauge of telescopic rod weld, and the pressure end of digital display pressure gauge is located at the surface of compression load disk.Precisely, test temperature can be controlled accurately and remain constant for present invention pressurization, reduced influence of the temperature change to soft rock sample matric suction equilibrium process, shortened sample equilibration time, improve test efficiency, reduce measurement error, high reliablity is at low cost.
Description
Technical field
The invention belongs to matric suction balancing device, be related to a kind of controllable temperature pressure control soft rock matric suction balancing device and
Matric suction measurement method, the equilibrium process suitable for soil―structure interaction when filter paper method measurement matric suction, for measuring
Soft rock matric suction.
Background technique
Soil―structure interaction can describe the relationship of moisture content and matric suction in the soil body, more when measuring matric suction
Using the methods of pressure plate apparatus and filter paper method, pressure plate apparatus measurement matric suction is limited in scope, and filter paper method measurement range is big.Filter
Paper method is the method for suction in measurement soil a kind of both economical and easy to operate, and this method, which is built upon filter paper, same to be had
On the basis of the soil sample of certain suction reaches the hypothesis of balance, filter paper belongs to porous media material, when filter paper directly connects with soil sample
When touching, liquid water or gaseous state water coke slurry between soil sample and filter paper can achieve balance, and moisture content when filter paper is balanced substitutes into
The matric suction of soil can be obtained in the calibration equation of its filter paper, i.e. the balance of filter paper is equivalent to the matric suction of soil.Currently, filter paper
Manual pressurizing is relied primarily in the loading procedure of method measurement matric suction, and seal process is using preservative film and adhesive tape manual sealing
Mode, but the reliability based on Manual pressurizing is not high, and the process for removing preservative film and adhesive tape easily extends weighing sample and filter
The time of paper causes the loss of moisture in sample and filter paper, causes measurement inaccurate, since these problems also exist in soft rock base
In matter suction measurement, therefore need a kind of device for being dedicated to solving the above problems.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of soft rock matric suction balancing device of controllable temperature pressure control, pressurization
Precisely, test temperature can be controlled accurately and remain constant, reduce temperature change to the shadow of soft rock sample matric suction equilibrium process
It rings, shortens sample equilibration time, improve test efficiency, reduce measurement error, high reliablity is at low cost.
It is another object of the invention to provide a kind of matric suctions of the soft rock matric suction balancing device of controllable temperature pressure control
Measurement method.
The technical scheme adopted by the invention is that a kind of soft rock matric suction balancing device of controllable temperature pressure control, including bottom
Seat, pedestal are equipped with the temperature-controlling chamber for placing soft rock sample, and temperature-controlling chamber is the cylindrical pressure vessel of three-layer composite structure, temperature-controlling chamber
Locular wall be followed successively by the flexible glue layer of insulating layer, temperature control layer and heat conductive silica gel material from outside to inside, is described in temperature control layer equipped with annulus
Device, circular ring shape container is interior to be filled with heat-conducting medium layer, is equipped with thermoprobe and heating sheet in heat-conducting medium layer, thermoprobe passes through
The connection of the power switch of temperature controller and heating sheet；The upper port of temperature-controlling chamber is equipped with round cover, and circular cylinder, which covers, is equipped with unidirectional row
Stomata, the edge and bottom of round cover are equipped with heat-insulated silica gel layer, and the top center of round cover is embedded with force transmitting board, power transmission
Plate is equipped with the compression load disk of protrusion；Pedestal is equipped with the support frame for being used to support force transmission mechanism, and force transmission mechanism includes gear
And strut, the side of strut are equipped with tooth socket, gear and tooth socket are intermeshed, and gear is equipped with the handle for rotate gear, branch
The lower end of bar is connected with the telescopic rod that can be stretched in vertical direction, and telescopic rod passes through support frame and is slidably connected with support frame,
Telescopic rod is equipped with bolt pin, and the telescopic head of telescopic rod and digital display pressure gauge weld, the pressure end of digital display pressure gauge be located at by
Press the surface of carrier.
Further, the temperature control layer, flexible glue layer upper end be below the upper end of insulating layer, circular cylinder is covered on temperature control layer
It is surrounded with the side wall insulation layer of the upper end of flexible glue layer, round cover.
Further, the one-way vent is made of silicone tube and silicon rubber cup, is connected to inside silicone tube and temperature-controlling chamber, silicon
The upper end of Capsule and silicone tube is rotatablely connected, and circular hole is equipped on silicon rubber cup and silicone tube, rotates silicon rubber cup, the circle on silicon rubber cup
Circular hole on hole and silicone tube, which has, is interconnected and mutually staggers two states.
Further, the diameter of the circular hole on the circular hole and silicone tube on the silicon rubber cup is 2mm.
Further, the longitudinal section of the heat-insulated silica gel layer is U shape, and force transmitting board is embedded at the interior of heat-insulated silica gel layer
Recess.
Further, the heat-conducting medium layer is the sodium acetate solution of mass concentration 15%.
Further, the temperature controller uses the digital display temperature controller of model TC-05B, and temperature controller is connected with external power supply.
Further, the thermoprobe is the cylinder of metal material, and heating sheet is the plate shape of stainless steel material, heating
Piece with a thickness of 2mm；Heating sheet is connect with external power supply, and the conducting wire of heating sheet and thermoprobe is embedded in chassis interior.
A kind of matric suction measurement method of the soft rock matric suction balancing device of controllable temperature pressure control, using above-mentioned controllable temperature
The soft rock matric suction balancing device of pressure control, specifically follows the steps below:
Step S1 weighs mass M after soft rock samples driedIt is dry, place into vacuum saturator and be saturated, filter paper will be protected
It puts with measurement filter paper and is dried in an oven；
Step S2, the soft rock sample after weighing saturation weigh the dry measurement filter paper m being cooled to room temperatureIt is dry, filter paper will be measured
It is placed on the bottom of temperature-controlling chamber, protection filter paper is placed on measurement filter paper；The soft rock sample of saturation is dried and is put into insulating box in advance
Heat sets the temperature of insulating box according to test temperature demand；
Step S3 covers round cover, the set temperature on temperature controller, heating sheet heated for controlling temperature layer is controlled, so that temperature control
Layer is identical as the temperature of insulating box；
Preheated soft rock sample is put on the indoor protection filter paper of temperature control by step S4, covers round cover, and rotation is single
Silicon rubber cup on gas vent is connected to the circular hole on silicon rubber cup with the circular hole on silicone tube, after the indoor air of temperature control is discharged,
Silicon rubber cup is continued to rotate, the circular hole on circular hole and silicone tube on silicon rubber cup is made to be staggered；Swinging handle, band moving gear rotate, tooth
Wheel drives strut to move downward, and then the telescopic rod of lower section is driven to move down, and applies pressure to compression load disk, passes through digital display
Pressure gauge judges the size of pressing force, after being loaded onto required pressure, bolt pin is inserted on telescopic rod, bolt pin blocks
Telescopic rod prevents it from continuing to move to, and maintains loading force constant；
Soft rock sample is stood balance 10-15 days by step S5, taking-up soft rock sample after balance, and is completed in 30 seconds soft
The weighing of rock sample mass M and measurement filter paper quality m, the calculating for bringing the quality of soft rock sample and measurement filter paper into moisture content are public
Formula is balanced rear soft rock sample and measures the moisture content of filter paper, and the moisture content for measuring filter paper is brought into the calibration side of measurement filter paper
Cheng Zhong obtains the matric suction of the measurement filter paper under the moisture content to get the matric suction for arriving soft rock sample under the moisture content；
Step S6 repeats step S1- step S5 according to test requirements document, draws the soil―structure interaction of soft rock sample, then
The matric suction of soft rock sample is acquired according to the practical moisture content of soft rock sample.
Further, in the step 5, soft rock sample moisture content W after balanceSoft rockIt calculates according to the following formula:
The moisture content w of filter paper is measured after balanceFilter paperIt calculates according to the following formula:
The invention has the advantages that the soft rock matric suction balancing device of controllable temperature pressure control of the present invention, using pressurization, control
Warm and closed integrated balancing device overcomes the problem of tradition is brought by Manual pressurizing, using force transmission mechanism and digital display
Pressure gauge controls on-load pressure, so that pressure-loaded is more accurate；The indoor air of temperature control is discharged using exhaust structure, so that temperature control
Indoor soft rock sample is more bonded with filter paper, reduces the loss of moisture, shortens equilibration time, controls environment temperature using temperature-controlling chamber
Degree improves the efficiency and accuracy of the measurement of soft rock matric suction to influence caused by moisture content, reusable.
The matric suction measurement method of the soft rock matric suction balancing device of controllable temperature pressure control of the present invention, is surveyed using filter paper method
The equilibrium process of matric suction is measured, measures the matric suction of soft rock sample indirectly；Preheated soft rock sample is put into temperature-controlling chamber
On interior protection filter paper, temperature is avoided to influence it, improves pressurization, sealing and temperature control method, pressurization is accurate, accurate Control experiment
Temperature shortens sample equilibration time, improves test efficiency, reduces measurement error；Conventional method has been abandoned by preservative film, tinfoil paper
The tedious steps that paper and adhesive tape are sealed soft rock sample avoid extending the title of soft rock sample due to dismounting preservative film
It measures the time and increases measurement error, this measurement method high reliablity, cost is relatively low, easy to operate.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of balancing device of the present invention.
Fig. 2 is the perspective view of balancing device of the present invention.
Fig. 3 is the structural schematic diagram of strut of the present invention, gear.
Fig. 4 is the structural schematic diagram of compression system of the present invention.
Fig. 5 is the structural schematic diagram of the round cover of the present invention.
Fig. 6 is the structural schematic diagram of temperature-controlling chamber of the present invention.
In figure, 1. handles, 2. gears, 3. support frames, 4. force transmission mechanisms, 5. one-way vents, 51. silicone tubes, 52. silica gel
Cap, 6. heat-insulated silica gel layers, 7. force transmitting boards, 8. insulating layers, 9. flexible glue layers, 10. heating sheets, 11. bolt pins, 12. temperature control layers,
13. soft rock sample, 14. digital display pressure gauges, 15. tooth sockets, 16. temperature controllers, 17. telescopic rods, 18. thermoprobes, 19. struts, 20.
Pedestal, 21. compression load disks, 22. heat-conducting medium layers, 23. circular ring shape containers, 24. temperature-controlling chamber.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
The soft rock matric suction balancing device of controllable temperature pressure control of the present invention, as shown in Figs. 1-2, including pedestal 20, pedestal 20
It is equipped with the temperature-controlling chamber 24 for placing soft rock sample 13, temperature-controlling chamber 24 is the cylindrical pressure vessel of three-layer composite structure, temperature-controlling chamber
24 locular wall is followed successively by the flexible glue layer 9 of insulating layer 8, temperature control layer 12 and heat conductive silica gel material from outside to inside, is equipped in temperature control layer 12
Circular ring shape container 23, circular ring shape container 23 is interior to be filled with heat-conducting medium layer 22, is equipped with 18 He of thermoprobe in heat-conducting medium layer 22
Heating sheet 10, thermoprobe 18 are connect by temperature controller 16 with the power switch of heating sheet 10；Thermoprobe 18 measures thermally conductive Jie
The temperature of matter layer 22, temperature controller 16 control heating sheet 10 and heat heat-conducting medium layer 22 to required temperature, so that the temperature of temperature control layer 12
Degree is controllable, and constant is required temperature, prevents influence of the variation of temperature to 13 matric suction equilibrium process of soft rock sample, is met
The matric suction measurement of soft rock sample 13 at a temperature of varying environment.
The upper port of temperature-controlling chamber 24 is equipped with round cover, and circular cylinder is covered equipped with one-way vent 5, the edge of round cover
Be equipped with heat-insulated silica gel layer 6 with bottom, the top center of round cover is embedded with force transmitting board 7, force transmitting board 7 be equipped with protrusion by
Press carrier 21；Pedestal 20 is equipped with the support frame 3 for being used to support force transmission mechanism 4, and force transmission mechanism 4 includes gear 2 and strut 19,
The side of strut 19 is equipped with tooth socket 15, and gear 2 and tooth socket 15 are intermeshed, and gear 2 is equipped with the handle for rotating gear 2
1, the lower end of strut 19 is connect with telescopic rod 17, and telescopic rod 17 passes through support frame 3 and is slidably connected with support frame 3, telescopic rod 17
Telescopic head and digital display pressure gauge 14 weld, the pressure end of digital display pressure gauge 14 is located at the surface of compression load disk 21；It is flexible
Bar 17 is equipped with bolt pin 11, and bolt pin 11 blocks the movement that telescopic rod 17 prevents it from continuing, and control telescopic rod 17 is pressed in
The size of power on bearing plate.
Telescopic rod 17 can stretch in vertical direction, for adjusting the height of 14 pressure end of digital display pressure gauge, so that this
Device can adapt to the temperature-controlling chamber 24 in different height, to measure the soft rock sample 13 of different height, enhance the device
Applicability.
Flexible glue layer 9 is made using heat conductive silica gel, and heat conductive silica gel can reduce heat loss in temperature-controlling chamber 24, and heat conductive silica gel
Deformation is big, fits closely soft rock sample 13 with temperature-controlling chamber 24 inner wall, prevents scattering and disappearing for 13 moisture of soft rock sample.
One-way vent 5 is made of silicone tube 51 and silicon rubber cup 52, is connected to inside silicone tube 51 and temperature-controlling chamber 24, silicon rubber cup
52 are rotatablely connected with the upper end of silicone tube 51, and circular hole is equipped on silicon rubber cup 52 and silicone tube 51, rotate silicon rubber cup 52, silicon rubber cup
Circular hole on 52 and the circular hole on silicone tube 51, which have, to be interconnected and mutually staggers two states, the circular hole on silicon rubber cup 52 with
The diameter of circular hole on silicone tube 51 is 2mm；Because 24 inner wall of temperature-controlling chamber is flexible glue layer 9, there is elasticity, by soft rock sample 13
When putting in, 24 inner air of temperature-controlling chamber is extruded, and rotates silicon rubber cup 52, the circle on circular hole and silicone tube 51 on silicon rubber cup 52
Hole is connected to, and the air in temperature-controlling chamber 24 avoids the moisture pair in air by the circular hole discharge on silicone tube 51 and silicon rubber cup 52
The interference of equilibrium process improves measurement accuracy；After gas discharge in temperature-controlling chamber 24, silicon rubber cup 52, silicon rubber cup 52 are continued to rotate
On circular hole can be staggered with the circular hole on silicone tube 51, close one-way vent 5.
Heat-conducting medium layer 22 is the sodium acetate solution of mass concentration 15%, and sodium acetate solution is strong electrolyte, soluble easily in water,
With good electric conductivity, using the direct sodium acetate solution of heating sheet 10, good electric conductivity is conducive to solution and is heated more evenly,
It is nontoxic under the sodium acetate solution of mass concentration 15% is economical and easily available and normal use；Excessive concentration has slight thorn to skin and eyes
Swash.
Temperature controller 16 uses the digital display temperature controller of model TC-05B, and temperature controller 16 is connected with external power supply, the temperature controller
16 have the advantages that following three points: plug and play, using simple, internal fuse, exceed set temperature range, and loudspeaker pipe instruction
Lamp flashing is reminded, and temperature-measuring range is big, and temperature control range is -9 DEG C~99 DEG C；0.1 degree of error, waterproofing design, thermoprobe 18 is certainly
By customizing, Current Temperatures, start-up temperature stop temperature number display simultaneously, very clear, facilitate management；Host, sub-power source line
Body design, it is easy to maintain.Cylinder of the thermoprobe 18 for metal material, diameter 3mm, high 20mm, temperature sensor are more uniform；Add
Backing 10 is the plate shape of stainless steel material, heating sheet 10 with a thickness of 2mm, increase the contact area with heat-conducting medium layer 22, survey
Warm probe 18 is connected on external temperature sensor, and heating sheet and temperature sensor are connected with power supply respectively；Heating sheet 10 and outer
The conducting wire of the connection of portion's power supply, heating sheet 10 and thermoprobe 18 is embedded in inside pedestal 20.
Digital display pressure gauge 14 is pointer digital displaying push-and-pull tensiometer, and detection quickly, can directly read pressurizeed size, is relied on
Spring in instrument obtains pressing force size by the moving displacement of spring using Hooke's law.
24 diameter 98mm of temperature-controlling chamber, high 100mm, inner ring wall thickness 2mm, the outer ring wall thickness 3mm of circular ring shape container 23, flexible glue layer
9 outer diameter 68mm, wall thickness 10mm, high 60mm, diameter 88mm, the high 25mm of round cover,
As shown in Figure 3-4, compression system by long 400mm, wide 200mm, high 20mm pedestal 20, long 400mm, width 200mm,
The support frame 3 of high 500mm, force transmission mechanism 4, handle 1, bolt pin 11, telescopic rod 17 and digital display pressure gauge 14 are constituted.Power transmission machine
Structure 4 is made of the strut 19 of the gear 2 of diameter 60mm and long 120mm, and 19 side of strut is equipped with tooth socket 15, gear 2 and tooth socket 15
Intermeshing.
As shown in figure 5, the upper end of temperature control layer 12, flexible glue layer 9 is lower than the upper end of insulating layer 8, circular cylinder is covered on temperature control layer
12 and flexible glue layer 9 upper end, the side wall insulation layer 8 of round cover surrounds, avoids thermal loss in course of exerting pressure, guarantee temperature control
The temperature of room 24 is constant.The longitudinal section of heat-insulated silica gel layer 6 is U shape, and force transmitting board 7 is embedded at the indent of heat-insulated silica gel layer 6
Pressure is uniformly transferred to heat-insulated silica gel layer 6, is pressed uniformly to soft rock sample 13 by place, force transmitting board 7；The outer diameter of heat-insulated silica gel layer 6
88mm, wall thickness 15mm, high 25mm, force transmitting board 7 are equipped with the compression load disk 21 of protrusion, can be not only used for bearing force transmission mechanism 4
Pressure, and conveniently lift round cover.
As shown in fig. 6, the outer diameter 98mm of insulating layer 8, wall thickness 5mm, high 100mm, insulating layer 8 is that high density rubber layer is (close
Spend 0.055~0.066g/cm3), insulating layer 8 has the function of completely cutting off heat loss, while a part as temperature-controlling chamber 24,
The temperature control layer 12 of glass material is covered, so that temperature-controlling chamber 24 is more attractive.
The matric suction measurement method of the soft rock matric suction balancing device of controllable temperature pressure control of the present invention, using above-mentioned controllable
The soft rock matric suction balancing device of temperature control pressure, specifically follows the steps below:
Step S1 will weigh mass M after the soft rock samples dried of diameter 50mm high 50mmIt is dry, place into vacuum saturator
It is saturated, protection filter paper and measurement filter paper is put and is dried in an oven, at the same time, checkout facility device various pieces
Whether completely can be used, and guarantees each section neat and tidy；
Step S2, the soft rock sample M after weighing saturationGreatly,WGreatlyIt is native for determining for maximum moisture content
Water characteristic curve maximum value；Weigh the dry measurement filter paper quality m being cooled to room temperatureIt is dry, measurement filter paper is placed on temperature-controlling chamber 24
Bottom, protection filter paper are placed on measurement filter paper；The soft rock sample of saturation is dried to be put into insulating box and is preheated, according to test temperature
The temperature of degree demand setting insulating box；
Step S3 covers round cover, the set temperature on temperature controller 16, and temperature controller 16 is measured according to thermoprobe 18
Temperature, controls 10 heated for controlling temperature layer 12 of heating sheet, and temperature control layer 12 is identical as the temperature of insulating box；
Preheated soft rock sample is put on the protection filter paper in temperature-controlling chamber 24 by step S4, covers round cover, rotation
Silicon rubber cup 52 in one-way vent 5 is connected to the circular hole on silicon rubber cup 52 with the circular hole on silicone tube 51, in temperature-controlling chamber 24
Gas discharge after, continue to rotate silicon rubber cup 52, circular hole and the circular hole on silicone tube 51 on silicon rubber cup 52 made to be staggered；Shake hand
Handle 1, band moving gear 2 rotate, and move downward the strut being stuck on gear 2 19, and then drive telescopic rod 17 below downward
Mobile, the pressure end of digital display pressure gauge 14 is pressed in vertically on compression load disk 21, is compacted soft rock sample by heat-insulated silica gel layer 6,
The pressure size loaded to compression load disk 21 is judged by digital display pressure gauge 14, after being loaded onto required pressure, by bolt pin
11 are inserted on telescopic rod 17, and bolt pin 11, which blocks telescopic rod 17, prevents it from continuing to move to, and guarantee that loading force is constant；
Soft rock sample is stood balance 10-15 days by step S5, taking-up soft rock sample after balance, and is completed in 30 seconds soft
The weighing of rock sample mass M and measurement filter paper quality m, because the time, which lengthens, can make the reduction of the moisture content of soft rock sample and filter paper,
Test result is influenced, the quality of soft rock sample and measurement filter paper is brought into the calculation formula of moisture content, rear soft rock is balanced and contains
Water rate WSoft rockWith measurement filter paper moisture content wFilter paper,
The moisture content for measuring filter paper is brought into the calibration equation of measurement filter paper, obtains the measurement filter paper under the moisture content
Matric suction is to get the calibration equation for measuring filter paper used to the matric suction of soft rock sample under the moisture content, the present embodiment
To see below formula:
LgS=5.493-0.076wf, wf≤ 47%
LgS=5.493-0.076wf, wf> 47%
Wherein, S is suction, unit kPa, wfFor the moisture content of filter paper；
Step S6 repeats step S1- step S5 according to test requirements document, and soil-water feature that soft rock sample can be obtained is bent
Line acquires the matric suction of soft rock sample according to the practical moisture content of soft rock sample.
Suction equalization device of the invention focuses on obtaining using the equilibrium process of simulation filter paper method measurement matric suction
The moisture content of the moisture content of soft rock sample and measurement filter paper after balance acquires under the moisture content according to the moisture content of measurement filter paper
The matric suction of filter paper is measured, the matric suction numerically equal with soft rock sample under the moisture content is drawn repeatedly after measurement
The soil―structure interaction of soft rock sample processed, the matric suction of soft rock sample is acquired according to the practical moisture content of soft rock sample.Pass through
The above method measures the matric suction of soft rock sample indirectly；Traditional measurement cannot accurately control the size of on-load pressure, in suction
Influence of the temperature change to suction equalization process is not considered in equilibrium process, too long so as to cause equilibration time, measurement efficiency is low；
Apparatus of the present invention can not only shorten equilibration time, moreover it is possible to control environment temperature influence caused by soft rock sample moisture content, press
Power load can be controlled accurately, improve the efficiency and accuracy of the measurement of soft rock matric suction.In actual application, Neng Goutong
The size for changing temperature-controlling chamber 24 is crossed, for placing multiple soft rock samples simultaneously, accelerates bulk testing progress, improves test efficiency.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (10)
1. a kind of soft rock matric suction balancing device of controllable temperature pressure control, which is characterized in that including pedestal (20), on pedestal (20)
Equipped with the temperature-controlling chamber (24) for placing soft rock sample, temperature-controlling chamber (24) is the cylindrical pressure vessel of three-layer composite structure, temperature-controlling chamber
(24) locular wall is followed successively by the flexible glue layer (9) of insulating layer (8), temperature control layer (12) and heat conductive silica gel material, temperature control layer from outside to inside
(12) circular ring shape container (23) are equipped in, are filled with heat-conducting medium layer (22) in circular ring shape container (23), heat-conducting medium layer (22)
Interior to be equipped with thermoprobe (18) and heating sheet (10), thermoprobe (18) is opened by temperature controller (16) and the power supply of heating sheet (10)
Connection connects；The upper port of temperature-controlling chamber (24) is equipped with round cover, and circular cylinder is covered equipped with one-way vent (5), round cover
Edge and bottom are equipped with heat-insulated silica gel layer (6), and the top center of round cover is embedded with force transmitting board (7), and force transmitting board is set on (7)
There is the compression load disk (21) of protrusion；Pedestal (20) is equipped with the support frame (3) for being used to support force transmission mechanism (4), force transmission mechanism
It (4) include gear (2) and strut (19), the side of strut (19) is equipped with tooth socket (15), and gear (2) is mutually nibbled with tooth socket (15)
It closes, gear (2) is equipped with the handle (1) for rotate gear (2), and the lower end of strut (19), which is connected with, to stretch in vertical direction
The telescopic rod (17) of contracting, telescopic rod (17) pass through support frame (3) and are slidably connected with support frame (3), and telescopic rod (17) is equipped with
Bolt pin (11), the telescopic head of telescopic rod (17) and digital display pressure gauge (14) are welded, the pressure end position of digital display pressure gauge (14)
In the surface of compression load disk (21).
2. a kind of soft rock matric suction balancing device of controllable temperature pressure control according to claim 1, which is characterized in that described
Temperature control layer (12), flexible glue layer (9) upper end be below the upper end of insulating layer (8), circular cylinder is covered on temperature control layer (12) and flexible glue
The side wall insulation layer (8) of the upper end of layer (9), round cover surrounds.
3. a kind of soft rock matric suction balancing device of controllable temperature pressure control according to claim 1, which is characterized in that described
One-way vent (5) is made of silicone tube (51) and silicon rubber cup (52), is connected to inside silicone tube (51) and temperature-controlling chamber (24), silica gel
The upper end of cap (52) and silicone tube (51) is rotatablely connected, and circular hole is equipped on silicon rubber cup (52) and silicone tube (51), rotates silica gel
Cap (52), the circular hole on circular hole and silicone tube (51) on silicon rubber cup (52), which has, is interconnected and mutually staggers two states.
4. a kind of soft rock matric suction balancing device of controllable temperature pressure control according to claim 3, which is characterized in that described
The diameter of the circular hole on circular hole and silicone tube (51) on silicon rubber cup (52) is 2mm.
5. a kind of soft rock matric suction balancing device of controllable temperature pressure control according to claim 1, which is characterized in that described
The longitudinal section of heat-insulated silica gel layer (6) is U shape, and force transmitting board (7) is embedded at the interior recess of heat-insulated silica gel layer (6).
6. a kind of soft rock matric suction balancing device of controllable temperature pressure control according to claim 1, which is characterized in that described
Heat-conducting medium layer (22) is the sodium acetate solution of mass concentration 15%.
7. a kind of soft rock matric suction balancing device of controllable temperature pressure control according to claim 1, which is characterized in that described
Temperature controller (16) uses the digital display temperature controller of model TC-05B, and temperature controller (16) is connected with external power supply.
8. a kind of soft rock matric suction balancing device of controllable temperature pressure control according to claim 1, which is characterized in that described
Thermoprobe (18) is the cylinder of metal material, and heating sheet (10) is the plate shape of stainless steel material, the thickness of heating sheet (10)
For 2mm；Heating sheet (10) is connect with external power supply, and the conducting wire of heating sheet (10) and thermoprobe (18) is embedded in pedestal (20)
Portion.
9. a kind of matric suction measurement method of the soft rock matric suction balancing device of controllable temperature pressure control, which is characterized in that use
Such as the soft rock matric suction balancing device of the described in any item controllable temperature pressure controls of claim 1-8, specifically according to the following steps into
Row:
Step S1 weighs mass M after soft rock samples driedIt is dry, place into vacuum saturator and be saturated, by protection filter paper and survey
Amount filter paper is put to be dried in an oven；
Step S2, the soft rock sample after weighing saturation weigh the dry measurement filter paper m being cooled to room temperatureIt is dry, measurement filter paper is placed on
The bottom of temperature-controlling chamber (24), protection filter paper are placed on measurement filter paper；The soft rock sample of saturation is dried and is put into insulating box in advance
Heat sets the temperature of insulating box according to test temperature demand；
Step S3 covers round cover, the set temperature on temperature controller (16), controls heating sheet (10) heated for controlling temperature layer (12),
So that temperature control layer (12) is identical as the temperature of insulating box；
Preheated soft rock sample is put on the protection filter paper in temperature-controlling chamber (24) by step S4, covers round cover, and rotation is single
Silicon rubber cup (52) on gas vent (5) is connected to the circular hole on silicon rubber cup (52) with the circular hole on silicone tube (51), discharge control
After air in greenhouse (24), silicon rubber cup (52) are continued to rotate, make the circular hole on silicon rubber cup (52) and the circle on silicone tube (51)
Hole is staggered；Swinging handle (1), band moving gear (2) rotate, and gear (2) drives strut (19) to move downward, and then drive lower section
Telescopic rod (17) moves down, and applies pressure to compression load disk (21), judges pressing force by digital display pressure gauge (14)
After being loaded onto required pressure, bolt pin (11) is inserted on telescopic rod (17) for size, and bolt pin (11) blocks telescopic rod
(17) it prevents it from continuing to move to, maintains loading force constant；
Soft rock sample is stood balance 10-15 days, takes out soft rock sample after balance, and complete soft rock examination in 30 seconds by step S5
The weighing of sample mass M and measurement filter paper quality m obtains the calculation formula that the quality of soft rock sample and measurement filter paper brings moisture content into
The moisture content for measuring filter paper, is brought into the calibration equation of measurement filter paper by the moisture content of soft rock sample and measurement filter paper after to balance
In, the matric suction of the measurement filter paper under the moisture content is obtained to get the matric suction for arriving soft rock sample under the moisture content；
Step S6 repeats step S1- step S5 according to test requirements document, draws the soil―structure interaction of soft rock sample, further according to
The practical moisture content of soft rock sample acquires the matric suction of soft rock sample.
10. a kind of matric suction of the soft rock matric suction balancing device of controllable temperature pressure control according to claim 9 measures
Method, which is characterized in that in the step 5, soft rock sample moisture content W after balanceSoft rockIt calculates according to the following formula:
The moisture content w of filter paper is measured after balanceFilter paperIt calculates according to the following formula:
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