CN211206497U - Unsaturated soil-water-gas two-phase flow migration experimental instrument under loading and unloading disturbance - Google Patents
Unsaturated soil-water-gas two-phase flow migration experimental instrument under loading and unloading disturbance Download PDFInfo
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- CN211206497U CN211206497U CN201921736320.8U CN201921736320U CN211206497U CN 211206497 U CN211206497 U CN 211206497U CN 201921736320 U CN201921736320 U CN 201921736320U CN 211206497 U CN211206497 U CN 211206497U
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Abstract
The utility model discloses a loading disturbance is two-phase flow migration experiment appearance of unsaturated soil aqueous vapor down, including mounting bracket and experimental box, the mah-jong bottle is installed to the side that lies in the experimental box on the horizontal plate of mounting bracket, the experimental box is open cube experimental box in top and roof, the open cube in top experimental box is layered and is filled with unsaturated soil sample, follow supreme layering pre-buried soil pressure cell down in the unsaturated soil sample, soil moisture sensor and baroceptor, be provided with the jack between the crossbeam of roof and door shape support, spoke formula pressure sensor is installed with the one end of roof contact to the jack, be provided with the water service pipe on the bottom plate, the play liquid end of mah-jong bottle passes through hose and water service pipe intercommunication, a plurality of through-holes have been seted up on curb plate and the roof. The utility model discloses utilize layering pre-compaction soil sample simulation unsaturated soil, utilize the jack to add the off-load disturbance for unsaturated soil, utilize the mahalanobis bottle simulation underground diving position to the phase is deepened to understand and is added under the off-load effect unsaturated soil aqueous vapor two-phase migration law.
Description
Technical Field
The utility model belongs to the technical field of the unsaturated soil aqueous vapor two-phase flow migration simulation under the loading and unloading disturbance, concretely relates to unsaturated soil aqueous vapor two-phase flow migration experiment appearance under the loading and unloading disturbance.
Background
In recent years, with the rapid progress of urbanization, mountainous regions are subjected to town construction in the forms of "mountain cutting and land making" and "mountain shifting and ravine filling". Taking Yanan city as an example, the completed first-stage project of Yanan new area is to smooth 30 seats of the mountain head. The seepage field and the stress field of the soil unsaturated zone can be changed in the excavation or landfill areas, and the seepage field and the stress field are important geological factors influencing the construction engineering land. The pores of unsaturated soil are filled with two fluids of water phase and gas phase, and the two fluids displace each other in the pore channels of soil to form a complex water-gas two-phase migration process, which is controlled by the coupling action of a seepage field and a stress field. When the soil body is deformed after being loaded or unloaded, the stress field of the rock and soil medium is changed, the pore structure in unsaturated soil is changed, and the hydraulic parameters are changed; the change of hydraulic parameters can cause the change of a seepage field, and further induce the change of a stress field. The 'fluid-solid coupling' effect between the seepage field and the stress field further influences the migration mechanism of the water-gas two-phase in the unsaturated soil. However, at present, no clear understanding is formed on the evolution rule of the unsaturated two phases of water and gas in the soil body under the excavation landfill loading and unloading conditions and the influence of the evolution rule on the hydrogeological conditions and the engineering geological conditions.
At present, experimental instruments for simulating and researching unsaturated soil water vapor two-phase flow migration mechanisms mainly comprise: one-dimensional and two-dimensional water-gas seepage combined measuring instruments, novel three-axis permeameters, common sand tank models and the like. The one-dimensional and two-dimensional water-gas seepage combined tester drives gas phase flow to build a water-gas two-phase flow field through water inflow seepage, and an automatic monitoring system is adopted to monitor the pressure change of gas in the soil column, so that a larger soil sample condition can be simulated, but the defect is that the effect of the seepage field on the water-gas two-phase flow is ignored; the novel triaxial permeameter can simulate the stress state and the saturation condition, can measure the water permeability coefficient and the air permeability coefficient under different stress states, has high automation degree and monitoring system sensitivity, but has the defect that the gaps in a soil sample are considered to be uniformly distributed and can not reveal the displacement process of water-gas two-phase flow; the sand tank model can simulate the influence of different rainfall intensities on unsaturated soil, can monitor the air pressure, negative pressure and water content of different burial depths, and can disclose the water-gas two-phase displacement process of the unsaturated soil, but has the defect of small load bearing capacity, and the components are mainly made of wood or angle steel and organic glass.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that not enough among the above-mentioned prior art is directed against, provide a unsaturated soil aqueous vapor two-phase flow migration experiment appearance under the disturbance of loading, its novel in design is reasonable, utilizes layering pre-compaction soil sample simulation unsaturated soil, utilizes the jack to add the disturbance of unloading for unsaturated soil, utilizes mahalanobis bottle simulation underground diving position simultaneously to the phase is deepened to understand the law of transporting of unsaturated soil aqueous vapor two-phase under the loading effect, convenient to popularize and use.
In order to solve the technical problem, the utility model discloses a technical scheme is: unsaturated soil water-gas two-phase flow migration experiment instrument under loading and unloading disturbance, its characterized in that: including mounting bracket and setting are in experimental box on the mounting bracket, the mounting bracket includes door shape support and sets up the base of door shape support bottom is located door shape support crossbeam on the base and is provided with under and be used for the installation the horizontal plate of experimental box, lies in on the horizontal plate the ma shi bottle that is used for simulating the groundwater level is installed to the side of experimental box, the experimental box be the open cube experimental box in top and with the open cube experimental box cooperation in top just follows the roof that the open cube experimental box in top direction of height removed, the open cube experimental box in top includes bottom plate, two panels and two curb plates, the open cube experimental box in top is filled with unsaturated soil sample in the layering, from supreme layering pre-buried soil pressure box that is used for testing unsaturated soil sample soil pressure value in the unsaturated soil sample down, A soil moisture sensor for testing unsaturated soil sample moisture content data and a baroceptor for testing unsaturated soil sample gas phase pressure data are provided with the jack between the crossbeam of roof and door shape support, and spoke formula pressure sensor is installed to the jack and the one end of roof contact, be provided with the water service pipe on the bottom plate, the play liquid end of ma shi bottle pass through the hose with the water service pipe intercommunication, be provided with the stagnant water clamp on the hose, set up a plurality of through-holes that are used for simulating stratum boundary condition on curb plate and the roof.
The unsaturated soil water-gas two-phase flow migration experimental instrument under loading and unloading disturbance is characterized in that: two follow supreme layering and horizontal installation down between the panel and have the bracing piece, two upper and lower surface malposition of bracing piece offer two recesses that are used for installing the soil pressure cell, and the bracing piece is installed two steel ears that are used for installing the soil pressure cell along the dislocation on two sides of length direction, and the both ends of bracing piece are provided with the screw hole, and the screw hole screw-thread fit of panel and bracing piece is passed to the screw.
The unsaturated soil water-gas two-phase flow migration experimental instrument under loading and unloading disturbance is characterized in that: and the connecting positions of the two panels and the two side plates are fixedly connected through reinforced angle steel.
The unsaturated soil water-gas two-phase flow migration experimental instrument under loading and unloading disturbance is characterized in that: the soil pressure box is characterized in that a water data collector used for receiving signals collected by the soil water sensor and an air pressure data collector used for receiving signals collected by the air pressure sensor are installed on a vertical beam of the portal-shaped support, a signal output end of the soil pressure box is connected with a signal input end of the static strain tester, a signal output end of the air pressure data collector, a signal output end of the water data collector and a signal output end of the spoke-type pressure sensor are connected with a signal input end of a control host, and the control host passes through the hydraulic pump control jack.
The unsaturated soil water-gas two-phase flow migration experimental instrument under loading and unloading disturbance is characterized in that: the output end of the control host is connected with a display.
The unsaturated soil water-gas two-phase flow migration experimental instrument under loading and unloading disturbance is characterized in that: the bottom of the unsaturated soil sample in the cubic experimental box with the open top is provided with a reverse filter layer in advance, and the height of the reverse filter layer is higher than that of the through hole at the bottommost layer of the side plate.
Compared with the prior art, the utility model has the following advantage:
1. the utility model discloses a setting is by portal frame and the mounting bracket installation experimental box that the base that sets up in portal frame bottom constitutes, sets up the jack and exerts pressure to the roof of experimental box between the crossbeam of roof and portal frame, and then realizes exerting pressure to the unsaturated soil in the experimental box, and the jack is used for testing the unsaturated soil value of exerting pressure in the experimental box with the one end installation spoke formula pressure sensor of roof contact, and is reliable and stable, convenient to popularize and use.
2. The utility model can realize the acquisition of the water-gas two-phase flow migration data in the depth direction of the unsaturated soil sample by filling the unsaturated soil sample in the cubic experimental box with the open top layer by layer and installing a layer of sensor group after filling a layer of unsaturated soil sample, wherein the sensor group comprises a plurality of soil pressure boxes, a plurality of soil moisture sensors and a plurality of air pressure sensors, a plurality of support rods are horizontally arranged between the two panels, threaded holes are arranged at the two ends of the support rods, screws penetrate through the panels and are in threaded fit with the threaded holes of the support rods, two grooves are arranged on the upper surface and the lower surface of each support rod in a staggered manner, two steel lugs are arranged on the two side surfaces of each support rod along the length direction in a staggered manner, a soil pressure cell is arranged in each groove, a soil pressure cell is arranged on each steel lug, and a data line of each soil pressure cell penetrates through the panel to be connected with a static strain tester; horizontally placing a soil moisture sensor in the unsaturated soil sample, wherein a data line of the soil moisture sensor penetrates out of a panel to be connected with a moisture data collector; horizontally placing an air pressure sensor in the unsaturated soil sample, wherein a data line of the air pressure sensor penetrates out of a panel to be connected with an air pressure data acquisition unit; the data acquisition is reliable, and the use effect is good.
3. The utility model discloses a set up the water service pipe on the bottom plate, the play liquid end of mah-jong bottle passes through hose and water service pipe intercommunication, is provided with the stagnant water on the hose and presss from both sides, sets up a plurality of through-holes that are used for simulating stratum boundary condition on curb plate and the roof, simulates two-phase flow migration law of the actual stratum loading and unloading disturbance lower soil body to supply actual construction reference.
To sum up, the utility model relates to a novel reasonable utilizes layering pre-compaction soil sample simulation unsaturated soil, utilizes the jack to add the off-load disturbance for unsaturated soil, utilizes the mahalanobis bottle simulation underground water level simultaneously to the phase is deepened to understand and is added under the off-load effect unsaturated soil aqueous vapor two-phase flow migration law, convenient to popularize and use.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic view of the structural connection of the present invention.
Fig. 2 is the installation relationship diagram of the installation rack and the experimental box of the present invention.
Fig. 3 is the installation relationship schematic diagram of the soil moisture sensor, the air pressure sensor and the support rod in the experimental box.
Fig. 4 is a schematic structural view of the support rod of the present invention.
Fig. 5 is a schematic block diagram of the circuit of the present invention.
Description of reference numerals:
1-a base; 2, horizontal plate; 3-a portal support;
4-1-side plate; 4-2-panels; 4-3-top plate;
4-reinforcing angle steel; 5, a jack; 6-spoke pressure sensor;
7-static strain gauge; 8-air pressure data acquisition unit; 9-water data collector;
10-mahalanobis bottle; 11-a support bar; 12-steel ear;
13-a groove; 14-a threaded hole; 15-soil pressure cell;
16-a soil moisture sensor; 17-a barometric sensor; 18-a hydraulic pump;
19-control host; 20-display.
Detailed Description
As shown in FIGS. 1 to 5, the unsaturated soil water-gas two-phase flow migration experiment instrument under loading disturbance of the present invention comprises a mounting rack and an experiment box arranged on the mounting rack, wherein the mounting rack comprises a door-shaped support 3 and a base 1 arranged at the bottom of the door-shaped support 3, a horizontal plate 2 for installing the experiment box is arranged on the base 1 and is positioned under the cross beam of the door-shaped support 3, a Ma's bottle 10 for simulating an underground diving place is arranged beside the experiment box on the horizontal plate 2, the experiment box is a cubic experiment box with an open top and a top plate 4-3 which is matched with the cubic experiment box with the open top and moves along the height direction of the cubic experiment box with the open top, the cubic experiment box with the open top comprises a bottom plate, two panels 4-2 and two side plates 4-1, the testing device is characterized in that unsaturated soil samples are filled in the cubic testing box with the open top in a layered mode, a soil pressure box 15 used for testing the soil pressure value of the unsaturated soil samples, a soil moisture sensor 16 used for testing the water content data of the unsaturated soil samples and an air pressure sensor 17 used for testing the gas phase pressure data of the unsaturated soil samples are pre-buried in the unsaturated soil samples from bottom to top in a layered mode, a jack 5 is arranged between the top plate 4-3 and the cross beam of the portal support 3, a spoke type pressure sensor 6 is installed at one end, in contact with the top plate 4-3, of the jack 5, a water service pipe is arranged on the bottom plate, the liquid outlet end of the March's flask 10 is communicated with the water service pipe through a hose, a water stop clamp is arranged on the hose, and a plurality of through holes used for simulating the stratum boundary conditions are formed in.
It should be noted that, the experiment box is installed by arranging the installation frame consisting of the portal bracket 3 and the base 1 arranged at the bottom of the portal bracket 3, the jack 5 is arranged between the top plate 4-3 and the cross beam of the portal bracket 3 to press the top plate 4-3 of the experiment box, so that the unsaturated soil in the experiment box is pressed, and the spoke type pressure sensor 6 is arranged at one end of the jack 5, which is in contact with the top plate 4-3, for testing the pressure value of the unsaturated soil in the experiment box, so that the experiment box is stable and reliable; unsaturated soil samples are filled in a cubic experimental box with an opening at the top in a layered mode, a sensor group is installed after the unsaturated soil samples are filled, and acquisition of water-gas two-phase flow migration data in the depth direction of the unsaturated soil samples can be achieved, wherein the sensor group comprises a plurality of soil pressure boxes 15, a plurality of soil moisture sensors 16 and a plurality of air pressure sensors 17, a plurality of support rods 11 are horizontally installed between two panels 4-2, threaded holes 14 are formed in two ends of each support rod 11, screws penetrate through the panels 4-2 to be in threaded fit with the threaded holes 14 of the support rods 11, two grooves 13 are formed in the upper surface and the lower surface of each support rod 11 in a staggered mode, two steel lugs 12 are installed on two side faces of each support rod 11 in the length direction in a staggered mode, one soil pressure box 15 is installed in each groove 13, and one soil pressure box 15 is installed on each steel lug 12, the data line of the soil pressure cell 15 penetrates through the panel 4-2 to be connected with the static strain tester 7; horizontally placing the soil moisture sensor 16 in the unsaturated soil sample, and connecting a data line of the soil moisture sensor 16 with the moisture data collector 9 after penetrating out of the panel 4-2; horizontally placing an air pressure sensor 17 in the unsaturated soil sample, wherein a data line of the air pressure sensor 17 penetrates through the panel 4-2 to be connected with an air pressure data acquisition unit 8; the data acquisition is reliable; a water pipe is arranged on the bottom plate, the liquid outlet end of the Malpighian bottle 10 is communicated with the water pipe through a hose, a water stop clamp is arranged on the hose, a plurality of through holes used for simulating stratum boundary conditions are formed in the side plate 4-1 and the top plate 4-3, and the two-phase flow migration rule of a soil body under actual stratum loading and unloading disturbance is simulated so as to be used for reference of actual construction.
The number of the preferred jacks 5 is two, the two jacks 5 are symmetrically arranged on the top plate 4-3 to ensure the stable pressure application of the unsaturated soil sample, and the spoke type pressure sensor 6 preferably adopts a TF04 spoke type pressure sensor.
In this embodiment, the support rod 11 is horizontally installed between the two panels 4-2 from bottom to top in a layered manner, two grooves 13 for installing the soil pressure cell 15 are formed in the upper surface and the lower surface of the support rod 11 in a staggered manner, two steel lugs 12 for installing the soil pressure cell 15 are installed in the support rod 11 in a staggered manner along two side surfaces of the length direction, threaded holes 14 are formed in two ends of the support rod 11, and screws penetrate through the panels 4-2 and are in threaded fit with the threaded holes 14 of the support rod 11.
It should be noted that, the two grooves 13 and the two steel lugs 12 are both installation bases for the soil pressure cell 15, and the soil pressure values in four directions on one support rod 11 are obtained.
In the embodiment, the connecting positions of the two panels 4-2 and the two side plates 4-1 are fixedly connected through reinforcing angle steel 4-4.
In this embodiment, a vertical beam of the portal support 3 is provided with a moisture data collector 9 for receiving signals collected by the soil moisture sensor 16 and an air pressure data collector 8 for receiving signals collected by the air pressure sensor 17, a signal output end of the soil pressure cell 15 is connected with a signal input end of the static strain tester 7, a signal output end of the air pressure data collector 8, a signal output end of the moisture data collector 9 and a signal output end of the spoke type pressure sensor 6 are connected with a signal input end of the control host 19, and the control host 19 controls the jack 5 through the hydraulic pump 18.
In this embodiment, the output end of the control host 19 is connected to a display 20.
It should be noted that the soil moisture sensor 16 preferably adopts an ECH20 soil moisture sensor, the moisture data collector 9 preferably adopts a matched EM50 data collector, the EM50 data collector collects data collected by a plurality of ECH20 soil moisture sensors and is connected to the control host 19 to read a numerical value, the air pressure sensor 17 preferably adopts a micro differential pressure sensor, the air pressure data collector 8 preferably adopts a Model264 micro differential pressure transmitter, and can measure differential pressure or gauge pressure and convert the differential pressure into a proportional electric signal to be output, so that the accuracy is high and the error is small.
In this embodiment, the bottom of the unsaturated soil sample in the cubic experimental box with the open top is provided with a reverse filter layer in advance, and the height of the reverse filter layer is higher than that of the through hole at the bottommost layer of the side plate 4-1.
It should be noted that the purpose of the height of the inverted filter layer higher than the height of the lowest through hole of the side plate 4-1 is to prevent the soil sample from flowing during the experimental pressurization process.
When the utility model is used, vaseline is smeared on the inner wall of the cubic experimental box with the open top, and the inverted filter layer is laid in the cubic experimental box with the open top, wherein the height of the inverted filter layer is higher than that of the bottommost through hole of the side plate 4-1; unsaturated soil samples are filled in layers, when each layer of unsaturated soil sample is filled, the unsaturated soil sample is pre-pressed to a specified volume, the surface of the pre-pressed unsaturated soil sample is napped, and the un-pressed unsaturated soil sample is placed into a layer of sensor group, wherein the sensor group comprises a plurality of soil pressure boxes 15, a plurality of soil moisture sensors 16 and a plurality of air pressure sensors 17;
when the soil pressure cell 15 is installed, a plurality of support rods 11 are horizontally installed between the two panels 4-2, threaded holes 14 are formed in two ends of each support rod 11, screws penetrate through the panels 4-2 to be in threaded fit with the threaded holes 14 of the support rods 11, two grooves 13 are formed in the upper surface and the lower surface of each support rod 11 in a staggered mode, two steel lugs 12 are installed on two side faces of each support rod 11 in the length direction in a staggered mode, a soil pressure cell 15 is installed in each groove 13, a soil pressure cell 15 is installed on each steel lug 12, and a data line of each soil pressure cell 15 penetrates through the panel 4-2 to be connected with the static strain tester 7;
when the soil moisture sensor 16 is installed, the soil moisture sensor 16 is horizontally placed in the unsaturated soil sample, and a data line of the soil moisture sensor 16 penetrates through the panel 4-2 to be connected with the moisture data collector 9;
when the air pressure sensor 17 is installed, the air pressure sensor 17 is horizontally placed in the unsaturated soil sample, and a data line of the air pressure sensor 17 penetrates through the panel 4-2 to be connected with the air pressure data collector 8; sealing the cubic experimental box with the top open;
the multilayer sensor groups in the cubic experimental box with the open top are numbered according to the number of layers of the sensor groups and different types of sensors in the sensor groups, and the data acquisition intervals of the sensor groups are set through the control host 19;
adding water into the Mariotte bottle 10 according to the height of the unsaturated soil water-gas two-phase flow migration experiment soil sample and the corresponding diving level design value, opening the water stop clamp until the diving level of the unsaturated soil water-gas two-phase flow migration experiment soil sample reaches the design value, closing the water stop clamp, and constructing and maintaining a diving level environment;
controlling a jack 5 to extend out to push a top plate 4-3, carrying out loading disturbance on the unsaturated soil sample, recording the actual loading value of the jack 5 to the unsaturated soil sample by using a spoke type pressure sensor 6, simultaneously collecting water-gas two-phase flow migration data under the loading disturbance of the unsaturated soil sample by using a sensor group, and finishing a loading disturbance experiment of the unsaturated soil sample when the loading value of the jack 5 to the unsaturated soil sample reaches a preset value and the preset value is stable;
controlling the jack 5 to retract, unloading and disturbing the unsaturated soil sample, recording an unloading actual value of the jack 5 to the unsaturated soil sample by using a spoke type pressure sensor 6, simultaneously acquiring water-gas two-phase flow migration data under the unloading disturbance of the unsaturated soil sample by using a sensor group, and finishing an unloading disturbance experiment of the unsaturated soil sample when the unloading value of the jack 5 to the unsaturated soil sample reaches a preset value and the preset value is stable; the loading disturbance experiment of the unsaturated soil sample is realized for a plurality of times by setting the loading preset value for a plurality of times, and the unloading disturbance experiment of the unsaturated soil sample is realized for a plurality of times by setting the unloading preset value for a plurality of times by controlling the retraction of the jack 5, and the experiment is repeated so as to deeply understand the migration rule of the water-gas two-phase flow of the unsaturated soil under the loading and unloading action, so that the use effect is good.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within the scope of protection.
Claims (6)
1. Unsaturated soil water-gas two-phase flow migration experiment instrument under loading and unloading disturbance, its characterized in that: the experimental box comprises an installation frame and an experimental box arranged on the installation frame, wherein the installation frame comprises a door-shaped support (3) and a base (1) arranged at the bottom of the door-shaped support (3), a horizontal plate (2) used for installing the experimental box is arranged under a cross beam of the door-shaped support (3) on the base (1), a March's flask (10) used for simulating an underground diving position is arranged on the horizontal plate (2) and beside the experimental box, the experimental box is a cubic experimental box with an open top and a top plate (4-3) matched with the cubic experimental box with the open top and moving along the height direction of the cubic experimental box with the open top, the cubic experimental box with the open top comprises a bottom plate, two panels (4-2) and two side plates (4-1), and unsaturated soil samples are filled in the cubic experimental box with the open top in a layered manner, soil pressure cell (15) for testing the unsaturated soil sample soil pressure value, a soil moisture sensor (16) for testing the unsaturated soil sample water content data and an air pressure sensor (17) for testing the unsaturated soil sample gas phase pressure data are pre-buried in the unsaturated soil sample from bottom to top in a layered mode, a jack (5) is arranged between a beam of a top plate (4-3) and a beam of a portal support (3), a spoke type pressure sensor (6) is installed at one end, in contact with the top plate (4-3), of the jack (5), a water service pipe is arranged on a bottom plate, the liquid outlet end of a Maltese bottle (10) is communicated with the water service pipe through a hose, a water stop clamp is arranged on the hose, and a plurality of through holes for simulating the stratum boundary condition are formed in a side plate (4-1) and the top plate (4-3).
2. The experimental instrument for migration of unsaturated soil water-gas two-phase flow under loading and unloading disturbance according to claim 1, characterized in that: two from supreme layering and horizontal installation down between panel (4-2) has bracing piece (11), two recess (13) that are used for installing soil pressure cell (15) are offered to upper and lower two surface dislocation of bracing piece (11), and dislocation is installed on two sides along length direction in bracing piece (11) two and is used for installing steel ear (12) of soil pressure cell (15), and the both ends of bracing piece (11) are provided with screw hole (14), and screw hole (14) screw-thread fit of panel (4-2) and bracing piece (11) is passed to the screw.
3. The experimental instrument for migration of unsaturated soil water-gas two-phase flow under loading and unloading disturbance according to claim 1, characterized in that: the connecting positions of the two panels (4-2) and the two side plates (4-1) are fixedly connected through reinforced angle steel (4-4).
4. The experimental instrument for migration of unsaturated soil water-gas two-phase flow under loading and unloading disturbance according to claim 1, characterized in that: install moisture data collection station (9) that are used for receiving soil moisture sensor (16) acquisition signal and atmospheric pressure data collection station (8) that are used for receiving baroceptor (17) acquisition signal on the vertical beam of door-shaped support (3), the signal output part of soil pressure cell (15) is connected with the signal input part of static strain tester (7), the signal output part of atmospheric pressure data collection station (8), the signal output part of moisture data collection station (9) and the signal output part of spoke formula pressure sensor (6) all are connected with the signal input part of main control system (19), main control system (19) are passed through hydraulic pump (18) control jack (5).
5. The experimental instrument for migration of unsaturated soil water-gas two-phase flow under loading and unloading disturbance according to claim 4, characterized in that: the output end of the control host (19) is connected with a display (20).
6. The experimental instrument for migration of unsaturated soil water-gas two-phase flow under loading and unloading disturbance according to claim 1, characterized in that: the bottom of the unsaturated soil sample in the cubic experimental box with the open top is provided with a reverse filter layer in advance, and the height of the reverse filter layer is higher than that of the through hole at the bottommost layer of the side plate (4-1).
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| CN201921736320.8U CN211206497U (en) | 2019-10-16 | 2019-10-16 | Unsaturated soil-water-gas two-phase flow migration experimental instrument under loading and unloading disturbance |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110579586A (en) * | 2019-10-16 | 2019-12-17 | 长安大学 | unsaturated soil water-gas two-phase flow migration experimental instrument and method under loading and unloading disturbance |
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| CN110579586A (en) * | 2019-10-16 | 2019-12-17 | 长安大学 | unsaturated soil water-gas two-phase flow migration experimental instrument and method under loading and unloading disturbance |
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