WO2021143229A1 - 测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统 - Google Patents

测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统 Download PDF

Info

Publication number
WO2021143229A1
WO2021143229A1 PCT/CN2020/121324 CN2020121324W WO2021143229A1 WO 2021143229 A1 WO2021143229 A1 WO 2021143229A1 CN 2020121324 W CN2020121324 W CN 2020121324W WO 2021143229 A1 WO2021143229 A1 WO 2021143229A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
triaxial
rock
pressure
ultra
Prior art date
Application number
PCT/CN2020/121324
Other languages
English (en)
French (fr)
Inventor
叶为民
崔林勇
王琼
季裕恒
陈永贵
陈宝
Original Assignee
同济大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 同济大学 filed Critical 同济大学
Publication of WO2021143229A1 publication Critical patent/WO2021143229A1/zh

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
    • G01N15/082—Investigating permeability by forcing a fluid through a sample
    • G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
    • G01N15/0806—Details, e.g. sample holders, mounting samples for testing

Definitions

  • This application relates to a test system for measuring the gas permeability parameters of ultra-low permeability media under multi-field and multi-phase coupling conditions in the technical fields of civil engineering (geotechnical) and geological engineering.
  • the deep geological disposal of high-level radioactive nuclear waste is to install various barriers to seal the waste in a suitable rock mass 500-1000m below the ground surface to prevent the leakage and migration of nuclides.
  • the repository can be divided into single-barrier storage and double-barrier storage.
  • the double-barrier library uses hard rock formations as the surrounding rock, such as the Yucca Mountain in the United States and Japan, and the Beishan pre-selected repository in China.
  • high-pressure bentonite with montmorillonite as the main component is the most suitable artificial barrier buffer/backfill material, which has multiple functions such as hydraulic barrier, chemical barrier and mechanical barrier.
  • the compacted bentonite used as a buffer/backfill material will experience extremely complex heat (T)-water (H)-force (M)-chemical (C)-gas (G) Multi-field multi-phase coupling interaction process.
  • the existing test devices mainly include three types: constant volume permeation device, constant volume radial permeation tester, and isotropic stress permeation device.
  • the constant volume permeation device and the constant volume radial percolation tester both monitor the flow at the outlet end, and can only obtain the macroscopic characterization parameters (permeability) of the material.
  • isotropic stress infiltration device with the help of flexible boundary and confining pressure control system, by monitoring gas pressure, flow and other data, it is possible to qualitatively analyze the influence of gas seepage path distribution and stress level (isotropic stress state) on the gas permeability process during the infiltration process .
  • the purpose of this application is to overcome the shortcomings of the prior art and provide a test system for measuring the gas permeability parameters of ultra-low permeability media under multi-field and multi-phase coupling conditions, which can be widely used in deep geological disposal of nuclear waste, landfills, and mine tailings.
  • Gas permeation test research in the fields of processing, CO2 capture and geological storage, compressed air energy storage, shale gas extraction, etc., to quickly and accurately obtain ultra-low permeability media under coupled conditions of heat (T)-water (H)-force (M) Gas permeability parameters have important engineering significance and practical value.
  • test system for measuring gas permeability parameters of ultra-low permeability media under multi-field and multi-phase coupling conditions is characterized in that the test system includes a triaxial seepage chamber, a deformation monitoring device, a temperature sensing control device, a volume/pressure controller, and a deviator stress loading Device, gas injection device, outlet buffer container, ultra-low permeability flow monitoring device.
  • the triaxial seepage chamber is the main part of the test system, including a shell and an inner cavity;
  • the three-axis seepage chamber shell is composed of a base, a top cover and a side ring, all made of stainless steel;
  • the base and side The rings are tightly connected together by a number of horizontal bolts;
  • the joints between the base and the side ring, the top cover and the side ring are sealed with a number of O-rings;
  • the base is provided with air inlets, The vent hole and the water supply hole;
  • the top of the top cover is provided with an exhaust hole, a thermal probe hole, and a bearing shaft hole;
  • the three-axis seepage chamber is provided with a number of triaxial chamber pillars, rock and soil samples,
  • the three-axis seepage chamber can be filled with liquid;
  • the several three-axis chamber pillars are vertically connected between the base and the top cover, and are arranged equidistantly
  • the rock-soil sample is the test material to be tested and is installed between the upper metal cylinder and the lower metal cylinder; the upper metal cylinder and the lower metal cylinder
  • the cross-sectional size of is the same as the cross-sectional size of the rock and soil sample.
  • a high-strength latex film was used to wrap the upper metal cylinder, the lower metal cylinder, and the outer side of the rock and soil sample, so that the three were in close contact.
  • the upper metal cylinder and the lower metal cylinder are provided with vent holes, and the bottom end of the upper metal cylinder vent hole and the top end of the lower metal cylinder vent hole are directly connected with the rock and soil sample; the upper metal cylinder The top of the vent hole is connected to the top of the base vent hole through a duct, and the bottom end of the metal cylinder below the vent hole is connected to the top of the base air inlet;
  • the deformation monitoring device is installed in the triaxial seepage chamber and consists of several eddy current sensors, several deformation monitoring frames, and several metal patches; the several eddy current sensors are fixed on the deformation monitoring frame, They are respectively arranged around the rock and soil samples at equal intervals along the height and circumferential direction of the rock and soil samples; the several deformation monitoring stands are arranged at equal intervals along the circumferential direction of the rock and soil samples; the metal patches are respectively Adhere to the outer surface of the high-strength latex film of the rock and soil sample at equal distances along the height and circumferential direction of the rock and soil sample, face and keep a certain distance with the eddy current sensor probe; the eddy current sensor can accurately measure metal
  • the static and dynamic relative displacement changes between the patch and the end face of the probe can indirectly obtain the local absolute deformation of the rock and soil sample during the infiltration process by monitoring the relative displacement of the metal patch in real time.
  • the temperature sensing and control device is installed outside the shell of the three-axis seepage chamber, and includes a heater, a temperature controller, and a thermal probe; the heater is wrapped on the outside of the side ring of the three-axis seepage chamber and is made of stainless steel.
  • the side ring is heated to indirectly transfer heat to the liquid filled in the triaxial infiltration chamber;
  • the temperature controller is connected to the heater through a wire, and the temperature of the liquid in the triaxial infiltration chamber can be measured according to the temperature setting value and the thermal probe Automatically control the on and off of the heater power;
  • the thermal probe extends the probe into the liquid in the triaxial seepage chamber through the thermal probe hole, which can be used to measure the temperature of the liquid in the triaxial seepage chamber, and then the real-time
  • the measured temperature data is transmitted to the temperature controller;
  • the heater, the temperature controller, and the thermal probe jointly constitute a closed-loop control device, which can accurately control the temperature of the tested rock and soil sample during the penetration test.
  • the volume/pressure controller is connected to the water supply hole of the triaxial permeation chamber through a pipe; for the assembled triaxial permeation chamber, the volume/pressure controller can inject or discharge liquid into the triaxial permeation chamber when the vent is opened , When the vent is closed, pressure can be applied to the liquid in the triaxial infiltration chamber, thereby exerting confining pressure on the rock and soil sample.
  • the deviator stress loading device is composed of a beam, a load cell, a load bearing shaft, a bearing, an operating platform, a load speed controller, a vertical shaft, and a column; the two columns are vertically fixed on the operating platform to fix and support Function; the beam is fixed on the column; the vertical shaft is fixed in the middle of the beam; the load cell is fixed on the bottom end of the vertical shaft for measuring the size of the axial load; the load-bearing shaft passes through The bearing shaft hole of the top cover of the triaxial seepage chamber, the top end of which is connected with the load cell, and the bottom end connected with the top of the upper metal cylinder, which is used to transmit the bottom-up axial load; the bearing is arranged on the top cover bearing shaft On the inner wall of the hole, in contact with the side wall of the bearing shaft, the three-axis seepage chamber can rise or fall as a whole while keeping the absolute position of the bearing shaft fixed; the main part of the load speed controller is installed inside the operating platform, with the top extending The operating platform
  • the gas injection device is composed of an infinite volume controller, a booster pump, a gas buffer container, and a gas/hydraulic conversion device;
  • the infinite volume controller is connected to the hydraulic end of the gas/hydraulic conversion device through a conduit, and the volume is infinite
  • the liquid in the controller can be input to the hydraulic end of the air/hydraulic conversion device with a constant volume, pressure and rate;
  • the booster pump uses compressed air as a power source, which can pressurize the helium gas and send it into the gas buffer through the tube
  • the container the gas buffer container is connected to the booster pump through one end of the pipe, and the other end is connected to the air pressure end of the air/hydraulic conversion device through the pipe.
  • the high-pressure gas from the booster pump can be buffered and then sent to the air/hydraulic
  • the pneumatic end of the conversion device is made of high-strength stainless steel, the hydraulic end of the pneumatic/hydraulic conversion device is connected with the infinite volume controller through a pipe, the pneumatic end is connected with the gas buffer container through a pipe, and the piston is used inside to connect
  • the pneumatic end is isolated from the hydraulic end; the hydraulic pressure is input to the air/hydraulic conversion device through the infinite volume controller, and the hydraulic pressure is converted into the air pressure of constant volume, pressure and speed through the piston inside the air/hydraulic conversion device, and then the air/hydraulic pressure is transferred through the pipe.
  • the high-pressure gas in the gas pressure end of the hydraulic conversion device is input into the air inlet of the triaxial seepage chamber, so that the high-pressure gas is injected into the rock and soil sample.
  • One end of the outlet buffer container is connected to the outlet hole of the triaxial seepage chamber through a conduit, and the other end is connected to the ultra-low permeability flow monitoring device through the conduit; the gas from the outlet hole of the triaxial seepage chamber is buffered here and passes through the ultra-low permeability
  • the flow monitoring device measures the flow; the bottom of the outlet buffer container is also equipped with a safety valve and an exhaust valve, when the pressure in the outlet buffer container exceeds the upper limit pressure of the safety valve, the pressure can be automatically relieved to ensure safety; the exhaust valve is used for testing After the end, manually empty the gas in the outlet buffer container.
  • the ultra-low permeability flow monitoring device includes four gas flow meters, a single-chip computer, four relays, and four solenoid valves; the gas from the outlet end of the outlet buffer container will flow into four branch pipelines; the four gas flow rates
  • the meters are installed on the four branch pipelines to measure the gas flow of the pipeline.
  • the four gas flow meters have different ranges; the four gas flow meters are connected to the single-chip microcomputer through wires, which can output flow digital signals to the single-chip microcomputer;
  • Two solenoid valves are installed on the four branch pipelines to control the on-off of the gas on the branch pipeline; one end of the four relays is connected to the four solenoid valves through wires, and the other end is connected to the single-chip microcomputer through wires.
  • the single-chip microcomputer can complete the data reading of the four gas flow meters, and automatically select the branch pipeline where the optimal range flowmeter is located according to the actual measured flow rate. Automatically control the on and off of the power of the four relays, thereby controlling the on and off of the four solenoid valves on the four pipelines, so as to realize the flow of gas on the branch pipeline where the flowmeter is located with the optimal range and the blocking of other branch pipelines; the gas The flowmeter, single-chip microcomputer, four relays, and four solenoid valves work together to realize automatic switching of each branch pipeline and continuously and automatically monitor the gas flow of the vent hole of the triaxial seepage chamber.
  • gas/hydraulic conversion device is connected to the infinite volume controller, and the other end is connected to the gas pre-pressurization device; inside the device, the high-pressure gas sent by the pre-pressurization system is hydraulically driven by the infinite volume controller.
  • the gaseous medium is fed into the rock and soil styles in the triaxial seepage chamber by means of volume control, pressure control and rate control.
  • the deformation monitoring device can accurately measure the static and dynamic relative displacement changes between the metal patch and the end face of the probe, and then indirectly obtain the local absolute deformation of the sample during the infiltration process.
  • the eddy current sensor is a non-contact measurement with good long-term reliability and wide measurement range.
  • the deviatoric stress loading device pushes the base to move upward through the load speed controller to realize axial compression loading; the loading method can satisfy both stress control and displacement control; it can be continuously loaded and unloaded.
  • the ultra-low permeability flow monitoring device uses several flowmeters to work in parallel, which can realize automatic switching of different ranges and accurately measure the gas flow at the outlet end of the triaxial seepage chamber.
  • FIG. 1 is a schematic diagram of the overall structure of a test system for measuring gas permeability parameters of ultra-low permeability media under multi-field and multi-phase coupling conditions provided by an embodiment of the application;
  • FIG. 2 is a schematic diagram of the structure of the triaxial seepage chamber, the deformation monitoring device and the temperature sensing and control device in the test system for measuring the gas permeability parameters of the ultra-low permeability medium under the multi-field and multi-phase coupling conditions provided by an embodiment of the application;
  • FIG 3 is a schematic diagram of the structure of the deviator stress loading device and the triaxial seepage chamber in the test system for measuring the gas permeability parameters of the ultra-low permeability medium under the condition of multi-field and multi-phase coupling provided by an embodiment of the application.
  • 1 is a triaxial seepage chamber
  • 2 is a deformation monitoring device
  • 3 is a temperature sensing device
  • 4 is a volume/pressure controller
  • 5 is a deviator stress loading device
  • 6 is a gas injection device
  • 7 is an outlet buffer container
  • 8 is a super Low permeability flow monitoring device
  • 11 is the base, 12 is the top cover, 13 is the side ring, 14 is the O-ring, 15 is the triaxial chamber pillar, 16 is the rock and soil sample, 17 is the bolt, 18 is the upper cylinder, 19 is the lower cylinder ;
  • 111 is the air inlet
  • 112 is the air outlet
  • 113 is the water supply hole
  • 121 is an exhaust hole, 122 is a thermal probe hole, and 123 is a bearing shaft hole;
  • 21 is an eddy current sensor, 22 is a deformation monitoring frame, and 23 is a metal patch;
  • 31 is a heater, 32 is a temperature controller, 33 is a thermal probe;
  • 51 is a beam
  • 52 is a load cell
  • 53 is a load bearing shaft
  • 54 is a bearing
  • 55 is an operating platform
  • 56 is a load speed controller
  • 57 is a vertical axis
  • 58 is a column;
  • 61 is an infinite volume controller, 62 is a booster pump, 63 is a gas buffer container, and 64 is a gas/hydraulic conversion device;
  • 71 is a safety valve, 72 is an exhaust valve;
  • 81 is a gas flow meter
  • 82 is a single-chip microcomputer
  • 83 is a relay
  • 84 is a solenoid valve.
  • the test device described in this application includes a triaxial seepage chamber 1, a temperature sensing device 3, a volume/pressure controller 4, a gas injection device 6, an outlet buffer vessel 7, and an ultra-low permeability flow monitoring device 8.
  • the triaxial seepage chamber 1 is the main part of the test system
  • the temperature sensing and control device 3 is located outside the triaxial seepage chamber 1, and can accurately control the temperature of the tested rock and soil sample during the permeability test through indirect heating.
  • the volume/pressure controller 4 adopts an ADVDPC type controller, which is connected to the water supply hole 113 of the triaxial infiltration chamber 1 through a pipe; for the assembled triaxial infiltration chamber 1, the volume/pressure controller is when the exhaust hole 121 is opened 4 Liquid can be injected or discharged into the inner cavity of the triaxial infiltration chamber 1, when the vent 121 is closed, pressure can be applied to the liquid in the inner cavity of the triaxial infiltration chamber 1, thereby exerting confining pressure on the rock and soil sample 16.
  • the confining pressure range It is 0-20 MPa.
  • the gas injection device 6 is composed of an infinite volume controller 61, a booster pump 62, a gas buffer container 63, and a gas/hydraulic conversion device 64; the infinite volume controller 61 adopts a GDSIVC type controller, which communicates with the gas through a pipe /The hydraulic end of the hydraulic conversion device 64 is connected.
  • the liquid in the infinite volume controller 61 can be input to the hydraulic end of the air/hydraulic conversion device 64 with a constant volume, pressure and rate.
  • the working pressure range is 0-20 MPa, and the pressure control accuracy is ⁇ 0.1 kPa; the capacity has no volume limit, the volume control accuracy is ⁇ 1 mm3, and the minimum working rate can be set at 0.0001 mL/min, and the rapid filling/draining speed is as high as 72 mL/min; the booster pump 62 uses compressed air as a power source, and can pressurize helium to below 20 MPa and send it to the gas buffer container 63 through a conduit;
  • the gas buffer container 63 is connected to the booster pump 62 through one end of the pipe, and the other end is connected to the gas pressure end of the air/hydraulic conversion device 64 through the pipe.
  • the high-pressure gas sent by the booster pump 62 can be buffered and then sent into the gas.
  • the air/hydraulic conversion device 64 has a volume of 2 L, made of high-strength stainless steel, and can withstand a pressure of not less than 20 MPa; the infinite volume controller 61 inputs hydraulic pressure into the air/hydraulic conversion device 64, The inside of the conversion device 64 converts the hydraulic pressure into a constant volume, pressure and rate of air pressure through a piston, and then inputs the high-pressure gas from the gas pressure end of the gas/hydraulic conversion device 64 to the air inlet 111 of the triaxial seepage chamber 1 through a pipe, so that the high-pressure gas Pour into the rock and soil
  • the outlet buffer container 7 has a volume of 100 mL and can withstand a pressure of not less than 20 MPa. One end is connected to the outlet hole 112 of the triaxial seepage chamber 1 through a conduit, and the other end is connected to the ultra-low permeability flow monitoring device 8 through a conduit; After the gas from the outlet hole 112 of the triaxial seepage chamber 1 is buffered, the flow is measured by the ultra-low permeability flow monitoring device 8.
  • the bottom of the outlet buffer container 7 is also provided with a safety valve 71 and an exhaust valve 72.
  • the ultra-low permeability flow monitoring device 8 includes four gas flow meters 81, a single-chip computer 82, four relays 83, and four solenoid valves 84; the gas from the outlet end of the outlet buffer container 7 will flow into the four branch pipelines;
  • the four gas flow meters 81 described use MFM gas mass flow meters with different ranges, which are installed on four branch pipelines to measure the gas flow of the pipeline.
  • the ranges of the four gas flow meters are 0 ⁇ 5 mL/min.
  • the solenoid valve 84 adopts the 2W-025-06 solenoid valve, which is installed on the four branch pipelines to control the on-off of the gas on the branch pipeline; the four relays 83 adopt SRD-05VDC-SL-C relays, One end is connected to the four solenoid valves 84 through wires, and the other end is connected to the single-chip microcomputer 82 through wires.
  • the single-chip 82 can control the on and off of the power of the four relays 83, thereby controlling the on and off of the four solenoid valves 84; 82 adopts STM32F103VE type single-chip microcomputer, which can complete the data reading of four gas flow meters 81, and automatically select the branch pipeline where the optimal range flow meter is located according to the actual measured flow rate, automatically control the on and off of the power of the four relays 83, thereby controlling the four pipelines
  • the on-off of the four solenoid valves 84 realizes the flow of gas on the branch pipeline where the flowmeter is located with the optimal range and the blocking of other branch pipelines; the gas flowmeter 81, the single-chip 82, the four relays 83, and the four
  • the solenoid valve 84 works cooperatively to realize the automatic switching of each branch pipeline, and continuously and automatically monitor the gas flow of the gas outlet 112 of the triaxial seepage chamber 1.
  • the three-axis seepage chamber 1 includes a housing and an inner cavity, a temperature sensing control device 3 is installed outside the housing, and a deformation monitoring device 2 is installed in the inner cavity;
  • the housing of the triaxial seepage chamber 1 is composed of a base 11, a top cover 12 and a side ring 13, all made of stainless steel; the base 11 and the side ring 13 are tightly connected together by four horizontal bolts 17 The joints between the base 11 and the side ring 13, the top cover 12 and the side ring 13 are sealed by two O-rings 14; the base 11 is provided with an air inlet 111, an air outlet 112 and a water supply hole 113; The top of the top cover 12 is provided with an exhaust hole 121, a thermal probe hole 122, and a bearing shaft hole 123;
  • the inner cavity of the triaxial seepage chamber 1 is provided with four triaxial chamber pillars 15, a rock and soil sample 16, an upper metal cylinder 18, and a lower metal cylinder 19; the inner cavity of the triaxial seepage chamber 1 can be Filled with liquid; the four triaxial chamber pillars 15 are vertically connected between the base 11 and the top cover 12, and are arranged equidistantly along the circumferential direction of the base 11, and play the role of supporting and fixing between the base 11 and the top cover 12;
  • the rock and soil sample 16 is the test material to be tested and is installed between the upper metal cylinder 18 and the lower metal cylinder 19; the cross-sectional dimensions of the upper metal cylinder 18 and the lower metal cylinder 19 are the same as those of the rock and soil body.
  • the cross-sectional dimensions of the sample 16 are the same.
  • a high-strength latex film is used to wrap the outer side of the upper metal cylinder 18, the lower metal cylinder 19, and the rock and soil sample 16, so that the three are in close contact without separation;
  • the upper metal cylinder 18 and the lower metal cylinder 19 are provided with vent holes.
  • the bottom end of the vent hole of the upper metal cylinder 18 and the top end of the vent hole of the lower metal cylinder 19 are directly connected with the rock and soil sample 16;
  • the top end of the vent hole of the cylinder 18 is connected to the top end of the vent hole 112 of the base 11 through a pipe, and the bottom end of the vent hole of the lower metal cylinder 19 is connected to the top end of the air inlet 111 of the base 11;
  • the deformation monitoring device 2 is installed in the inner cavity of the triaxial seepage chamber 1 and consists of twelve eddy current sensors 21, four deformation monitoring racks 22, and twelve metal patches 23; the eddy current sensor 21 Using the AEC-55MS-Z-52 converter, the twelve eddy current sensors 21 are divided into four groups, and three of each group are fixed on the deformation monitoring frame 22 equidistantly along the height of the rock and soil sample 16; The deformation monitoring stands 22 are arranged equidistantly along the circumferential direction of the rock-soil sample 16, and the bottom is fixed on the base 11 of the triaxial seepage chamber 1; the twelve metal patches 23 are divided into four groups, each with three Adhere to the outer surface of the high-strength latex film at the height of the rock and soil sample 16 at equal intervals.
  • the four sets of metal patches 23 are equally spaced along the circumferential direction of the rock and soil sample 16, and the metal patches 23
  • the position is directly opposite to the probe of the eddy current sensor 21, keeping a distance of 2 to 4 mm between the two; the eddy current sensor 21 can accurately measure the static and dynamic relative displacement changes between the metal patch 23 and the end face of the probe, through real-time
  • the relative displacement of the metal patch 23 is monitored to indirectly obtain the local absolute deformation of the rock-soil sample 17 during the infiltration process (the range is ⁇ 4 mm, and the accuracy can reach 0.3-0.5 ⁇ m).
  • the temperature sensing and control device 3 is installed outside the shell of the three-axis seepage chamber 1, and includes a heater 31, a temperature controller 32, and a thermal probe 33; the heater 31 adopts a SAQ300 type constant temperature heater and is wrapped in the three-axis seepage chamber 1.
  • the outside of the side ring 13 of the seepage chamber 1 heats the side ring 13 made of stainless steel to indirectly transfer heat to the liquid filled in the cavity of the triaxial infiltration chamber 1;
  • the temperature controller 32 adopts a CHB000B type thermostat,
  • the heater 31 is connected through a wire, and the power of the heater 31 can be automatically controlled according to the temperature setting value and the liquid temperature in the inner cavity of the triaxial seepage chamber 1 measured by the thermal probe 33;
  • the thermal probe 33 adopts WRP- 130 type thermocouple, the probe is extended into the liquid in the inner cavity of the triaxial seepage chamber 1 through the thermal probe hole 122, which can be used to measure the temperature of the liquid in the inner cavity of the triaxial seepage chamber 1, and then transmit the real-time measured temperature data to Temperature controller 32;
  • the heater 31, temperature controller 32, and thermal probe 33 together form a closed-loop control device, which can accurately control the temperature and temperature control range of the tested rock and soil sample during the penetration test It is 20 ⁇ 100 °C.
  • the deviator stress loading device 5 is composed of a beam 51, a load cell 52, a bearing shaft 53, a bearing 54, an operating platform 55, a load speed controller 56, a vertical shaft 57, and a column 58;
  • the two uprights 58 are vertically fixed on the operating platform 55 to serve as fixing and supporting functions;
  • the cross beam 51 is fixed on the upright 58;
  • the vertical shaft 57 is fixed in the middle of the cross beam;
  • the load cell 52 adopts RCD -100kN load transducer, fixed at the bottom end of the vertical shaft 57, used to measure the axial load, the sensor range is 0-100 kN;
  • the load bearing shaft 53 passes through the triaxial seepage chamber 1 top cover 12 load bearing shaft Hole 123, the top end of which is connected to the load cell 52, and the bottom end of which is connected to the top end of the upper metal cylinder 18, for transmitting bottom-up axial load;
  • the bearing 54 is arranged on the inner wall of the load bearing shaft hole
  • the ultra-low permeability flow monitoring device 8 has a complete pipeline connection and is in a closed state;
  • the temperature sensing device 3 is energized to heat the heater 31, and the temperature controller 32 is used to set the liquid in the triaxial seepage chamber 1 Temperature, the temperature of the liquid in the triaxial seepage chamber 1 is measured in real time by the thermal probe 33, and the temperature controller 32 will automatically control the on and off of the heater 31 according to the real-time data collected by the thermal probe 33;
  • the eddy current sensor 21 monitors the radial deformation data of the rock and soil sample 17 during the gas permeation process, and comprehensively evaluates the gas permeability.
  • the calculation formula of the volume permeability is:

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Fluid Mechanics (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

一种测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统，包括三轴渗流室（1）、变形监测装置（2）、温度感控装置（3）、体积/压力控制器（4）、偏应力加载装置（5）、气体注入装置（6）、出口缓冲容器（7）、超低渗流量监测装置（8），试验过程中，首先对岩土体试样施加温度和三轴应力控制；利用气体注入装置（6）向岩土体试样注入高压气体，高压气体经过渗透后进入出口缓冲容器和超低渗流量监测装置（8），获得气体渗透流量；变形监测装置（2）可在试验过程中测量岩土体试样的局部绝对变形量。实现了多场多相耦合条件下超低渗介质的气体渗透的全过程监测，能够获得气体渗透特性和宏观变形特性。

Description

测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统 技术领域
本申请涉及一种在土木工程（岩土）及地质工程技术领域，用于测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统。
 背景技术
高放射性核废物深地质处置是通过设置各种屏障，将废弃物封存在距地表以下500～1000m的合适岩体中，以阻止核素的泄漏与迁移。根据围岩的不同，处置库可分为单屏障库与双屏障库。其中，双屏障库选用坚硬岩层作为围岩，如美国尤卡山、日本的处置库，以及中国北山预选处置库等。双屏障库中，以蒙脱石为主要成分的高压实膨润土是最适合的人工屏障缓冲/回填材料，它具备水力屏障、化学屏障和机械屏障等多重功能。
处置库建设与长期运营过程中，受围岩的约束与地下水的入侵影响，膨润土自身吸水膨胀，库内核废料产生衰变热，以及围岩内地下水化学成分与库内混凝土结构部分衰解产生高碱溶液等，都将影响高压实膨润土的缓冲/回填性能的发挥。此外，研究还发现，因废物罐金属壳体腐蚀、微生物降解、水辐解等作用将产生大量气体（氢气、甲烷、二氧化碳等），并将在罐体周围压实膨润土及相关低渗屏障体中不断积聚，从而产生极高的气体压力。因此，在处置库的长期运营过程中，作为缓冲/回填材料的高压实膨润土将经历热(T)-水(H)-力(M)-化(C)-气(G)极其复杂的多场多相耦合作用过程。
针对多场多相耦合条件下超低渗介质气体渗流试验，既有的试验装置主要包括三大类：恒体积渗透装置、恒定体积径向渗流试验仪、等向应力渗透装置。其中恒体积渗透装置和恒定体积径向渗流试验仪均是通过对出口端的流量进行监控，只能得到材料的宏观表征参数（渗透率）。对于等向应力渗透装置，借助柔性边界和围压控制系统，通过监测气体压力、流量等数据，可以定性分析渗透过程中气体渗流路径分布以及应力水平（等向应力状态）对气体渗透过程的影响。然而，这三类既有渗透装置都无法模拟试验中温度场、应力场等复杂条件对气体渗透的影响。因此，适用于研究热(T)-水(H)-力(M)耦合作用对多相渗流过程影响的试验装置亟待开发。
 技术问题
本申请的目的在于：克服现有技术的不足，提供测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统，可广泛应用于核废料深地质处置、垃圾填埋、矿山尾矿处理、CO2 捕获与地质封存、空气压缩储能、页岩气开采等领域的气体渗透试验研究，快速、准确获得热(T)-水(H)-力(M)耦合条件下超低渗介质气体渗透参数，具有重要工程意义和实践价值。
 技术解决方案
测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统，其特征在于，该试验系统包括三轴渗流室、变形监测装置、温度感控装置、体积/压力控制器、偏应力加载装置、气体注入装置、出口缓冲容器、超低渗流量监测装置。
所述的三轴渗流室是试验系统的主体部分，包括外壳、内腔；所述的三轴渗流室外壳由底座、顶盖和侧环组成，均由不锈钢制成；所述的底座和侧环之间通过若干个水平向螺栓紧密连接在一起；所述的底座与侧环、顶盖与侧环的接缝处采用若干条O形圈密封；所述的底座内设有进气孔、出气孔和供水孔；所述的顶盖顶部设有排气孔、热探针孔、承重轴孔；所述的三轴渗流室内腔设置有若干根三轴室支柱、岩土体试样、上方金属圆柱体、下方金属圆柱体；所述的三轴渗流室内腔可充填液体；所述的若干根三轴室支柱垂直连接于底座与顶盖之间，沿底座圆周方向等距设置，起底座与顶盖之间支撑固定作用；所述的岩土体试样为被测试验材料，安装于上方金属圆柱体和下方金属圆柱体之间；所述的上方金属圆柱体、下方金属圆柱体的横截面尺寸与岩土体试样的横截面尺寸相同，试验中使用高强度乳胶膜包裹在上方金属圆柱体、下方金属圆柱体、岩土体试样外侧，使三者之间紧密接触，不发生脱离；所述的上方金属圆柱体、下方金属圆柱体内设有通气孔，上方金属圆柱体通气孔底端、下方金属圆柱体通气孔顶端与岩土体试样直接连通；上方金属圆柱体通气孔顶端通过导管与底座出气孔顶端连接，下方金属圆柱体通气孔底端与底座进气孔顶端连接；
所述的变形监测装置安装在三轴渗流室内腔内，由若干个电涡流传感器、若干个变形监测架、若干个金属贴片组成；所述的若干个电涡流传感器固定在变形监测架上，并分别沿岩土体试样高度、圆周方向等距布设在岩土体试样周围；所述的若干个变形监测架沿岩土体试样圆周方向等距布设；所述的金属贴片分别沿岩土体试样高度、圆周方向等距粘附在岩土体试样外高强度乳胶膜外表面，与电涡流传感器探头正对并保持一定距离；所述的电涡流传感器可精确测量金属贴片与探头端面之间静态和动态的相对位移变化，通过实时监测金属贴片相对位移来间接获得渗透过程中岩土体试样的局部绝对变形量。
所述的温度感控装置安装在三轴渗流室外壳外，包括加热器、温度控制器、热探针；所述的加热器包裹在三轴渗流室侧环外侧，通过对不锈钢材料制成的侧环加热，间接将热量传导给三轴渗透室内腔充填的液体；所述的温度控制器通过导线与加热器连接，可根据温度设定值和热探针测量的三轴渗流室内腔液体温度自动控制加热器电源的通断；所述的热探针通过热探针孔将探头伸入三轴渗流室内腔液体中，可用于测量的三轴渗流室内腔液体的温度，再通过导线将实时测量温度数据传输给温度控制器；所述的加热器、温度控制器、热探针三者共同构成闭环控制装置，可精确控制被测岩土体试样在渗透试验过程中的温度。
所述的体积/压力控制器通过导管与三轴渗透室供水孔相连；对于组装好的三轴渗透室，当排气孔打开时体积/压力控制器可向三轴渗透室内腔注入或排出液体，当排气孔关闭时可向三轴渗透室内腔液体施加压力，从而对岩土体试样施加围压。
所述的偏应力加载装置由横梁、称重传感器、承重轴、轴承、操作平台、载荷速度控制器、竖轴、立柱组成；所述的两根立柱垂直固定于操作平台上，起固定和支撑作用；所述的横梁固定在立柱上；所述的竖轴固定在横梁中间；所述的称重传感器固定于竖轴底端，用于测量轴向荷载的大小；所述的承重轴穿过三轴渗流室顶盖承重轴孔，其顶端与称重传感器相连，底端与上方金属圆柱体顶端相连，用于传递自下而上的轴向荷载；所述的轴承设置在顶盖承重轴孔内壁上，与承重轴侧壁接触，可以在保持承重轴绝对位置固定的条件下，三轴渗流室整体上升或下降；所述的载荷速度控制器主体部分安装于操作平台内部，顶部伸出操作平台并与三轴渗流室的底座接触，用于抬升或降低三轴渗流室底座，从而使三轴渗流室整体上升或下降；由于顶部的承重轴绝对位置固定，三轴渗流室整体上升或下降可以实现对岩土体试样施加或卸除轴压荷载。
所述的气体注入装置由无限体积控制器、增压泵、气体缓冲容器、气/液压转换装置组成；所述的无限体积控制器与气/液压转换装置液压端之间通过导管相连，无限体积控制器内液体可以以恒定体积、压力以及速率的方式输入到气/液压转换装置液压端；所述的增压泵以压缩空气作为动力源，可以对氦气增压并通过导管送入气体缓冲容器；所述的气体缓冲容器通过导管一端与增压泵相连，另一端通过导管与气/液压转换装置气压端相连，可将增压泵送来的高压气体在此缓冲后再送入气/液压转换装置气压端；所述的气/液压转换装置由高强度不锈钢制成，气/液压转换装置液压端与无限体积控制器通过导管连接，气压端与气体缓冲容器通过导管连接，内部使用活塞将气压端与液压端隔离；通过无限体积控制器向气/液压转换装置内输入液压，在气/液压转换装置内部通过活塞将液压转换为恒定体积、压力以及速率的气压，再通过导管将气/液压转换装置气压端内高压气体输入到三轴渗流室进气孔，从而使高压气体注入到岩土体试样中。
所述的出口缓冲容器一端通过导管与三轴渗流室出气孔相连，另一端通过导管与超低渗流量监测装置相连；从三轴渗流室出气孔出来的气体在此缓冲以后，通过超低渗流量监测装置测量流量；出口缓冲容器底部还设有安全阀和排气阀，当出口缓冲容器内的压力超过安全阀上限压力时能自动泄压，保障安全；所述的排气阀用于试验结束后手动排空出口缓冲容器内的气体。
所述的超低渗流量监测装置包括四个气体流量计、单片机、四个继电器、四个电磁阀；从出口缓冲容器出口端出来的气体将会流入四条分支管道；所述的四个气体流量计分别安装于四条分支管道上，用于测量该管道气体流量，四个气体流量计量程不同；四个气体流量计与单片机之间通过导线连接，可向单片机输出流量数字信号；所述的四个电磁阀分别安装于四条分支管道上，可控制该分支管道上气体的通断；所述的四个继电器一端分别通过导线与四个电磁阀连接，另一端通过导线与单片机连接，单片机可分别控制四个继电器电源的通断，从而控制四个电磁阀的通断；所述的单片机可完成四个气体流量计数据读取，并根据实测流量自动选择最优量程流量计所在分支管路，自动控制四个继电器电源的通断，从而控制四条管路上四个电磁阀的通断，实现最优量程流量计所在分支管路上气体的流通和其他分支管路气体的阻断；所述的气体流量计、单片机、四个继电器、四个电磁阀协同工作，可以实现各分支管道自动切换，连续自动监测三轴渗流室出气孔的气体流量。
 有益效果
（1）气/液压转换装置的一端与无限体积控制器相连，另一端与气体预增压装置相连；在该装置内部，通过无限体积控制器液压驱动预增压系统送来的高压气体，可将气体介质以体积控制、压力控制以及速率控制的方式送入三轴渗流室内岩土体式样中。
（2）变形监测装置可精确测量金属贴片与探头端面之间静态和动态的相对位移变化，进而间接获取渗透过程中试样的局部绝对变形量。此外，电涡流传感器为非接触式测量，长期工作可靠性好、测量范围宽。
（3）偏应力加载装置通过载荷速度控制器推动底座向上位移实现轴压加载；加载方式可满足应力控制和位移控制两种；可连续加、卸载。
（4）超低渗流量监测装置采用若干个流量计并联工作方式可以实现不同量程自动切换，精确测量三轴渗流室出口端的气体流量。
 附图说明
图1为本申请实施例提供的测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统的整体结构示意图；
图2为本申请实施例提供的测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统中三轴渗流室、变形监测装置和温度感控装置的结构示意图；
图3为本申请实施例提供的测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统中偏应力加载装置及三轴渗流室的结构示意图。
附图标记说明：
1为三轴渗流室、2为变形监测装置、3为温度感控装置、4为体积/压力控制器、5为偏应力加载装置、6为气体注入装置、7为出口缓冲容器、8为超低渗流量监测装置；
11为底座、12为顶盖、13为侧环、14为O型圈、15为三轴室支柱、16为岩土体试样、17为螺栓、18为上方圆柱体、19为下方圆柱体；
111为进气孔、112为出气孔、113为供水孔；
121为排气孔、122为热探针孔、123为承重轴孔；
21为电涡流传感器、22为变形监测架、23为金属贴片；
31为加热器、32为温度控制器、33为热探针；
51为横梁、52为称重传感器、53为承重轴、54为轴承、55为操作平台、56为载荷速度控制器、57为竖轴、58为立柱；
61为无限体积控制器、62为增压泵、63为气体缓冲容器、64为气/液压转换装置；
71为安全阀、72为排气阀；
81为气体流量计、82为单片机、83为继电器、84为电磁阀。
 本发明的最佳实施方式
下面将结合具体实施例及其附图对本申请提供的技术方案作进一步说明，结合下面说明，本申请的优点和特征将更加清楚。
如图1所示，本申请所述的试验装置，包括三轴渗流室1、温度感控装置3、体积/压力控制器4、气体注入装置6、出口缓冲容器7、超低渗流量监测装置8。
所述的三轴渗流室1是试验系统的主体部分；
所述的温度感控装置3位于三轴渗流室1外侧，可通过间接加热方式精确控制被测岩土体试样在渗透试验过程中的温度。
所述的体积/压力控制器4采用ADVDPC型控制器，通过导管与三轴渗透室1供水孔113相连；对于组装好的三轴渗透室1，当排气孔121打开时体积/压力控制器4可向三轴渗透室1内腔注入或排出液体，当排气孔121关闭时可向三轴渗透室1内腔液体施加压力，从而对岩土体试样16施加围压，围压范围为0～20 MPa。
所述的气体注入装置6由无限体积控制器61、增压泵62、气体缓冲容器63、气/液压转换装置64组成；所述的无限体积控制器61 采用GDSIVC型控制器，通过导管与气/液压转换装置64液压端相连，无限体积控制器61内液体可以以恒定体积、压力以及速率的方式输入到气/液压转换装置64液压端，工作压力范围为0～20 MPa，压力控制精度为±0.1 kPa；容量无体积限制，体积控制精度为±1 mm3，工作速率最低可设置在0.0001 mL/min，而快速填充/排水速度高达72 mL/min；所述的增压泵62以压缩空气作为动力源，可以把氦气增压到20 MPa以下并通过导管送入气体缓冲容器63；所述的气体缓冲容器63通过导管一端与增压泵62相连，另一端通过导管与气/液压转换装置64气压端相连，可将增压泵62送来的高压气体在此缓冲后再送入气/液压转换装置64气压端；所述的气/液压转换装置64液压端与无限体积控制器61通过导管连接，气压端与气体缓冲容器63通过导管连接，内部使用活塞将气压端与液压端隔离，气/液压转换装置64的容积为2 L，由高强度不锈钢制成，能够承受不小于20 MPa的压力；通过无限体积控制器61向气/液压转换装置64内输入液压，在气/液压转换装置64内部通过活塞将液压转换为恒定体积、压力以及速率的气压，再通过导管将气/液压转换装置64气压端内高压气体输入到三轴渗流室1进气孔111，从而使高压气体注入到岩土体试样16中。
所述的出口缓冲容器7的容积为100 mL，能够承受不小于20 MPa的压力，一端通过导管与三轴渗流室1出气孔112相连，另一端通过导管与超低渗流量监测装置8相连；从三轴渗流室1出气孔112出来的气体在此缓冲以后，通过超低渗流量监测装置8测量流量；出口缓冲容器7底部还设有安全阀71和排气阀72，当出口缓冲容器7内的压力超过安全阀71上限10 MPa时能自动泄压，保障安全；所述的排气阀72用于试验结束后手动排空出口缓冲容器7内的气体。
所述的超低渗流量监测装置8包括四个气体流量计81、单片机82、四个继电器83、四个电磁阀84；从出口缓冲容器7出口端出来的气体将会流入四条分支管道；所述的四个气体流量计81采用不同量程的MFM型气体质量流量计，分别安装于四条分支管道上，用于测量该管道气体流量，四个气体流量计量程分别为0～5 mL/min、0～100 mL/min、0～1000 mL/min和0～2000 mL/min；四个气体流量计81与单片机82之间通过导线连接，可向单片机82输出流量数字信号；所述的四个电磁阀84采用2W-025-06型电磁阀，分别安装于四条分支管道上，可控制该分支管道上气体的通断；所述的四个继电器83采用SRD-05VDC-SL-C型继电器，一端分别通过导线与四个电磁阀84连接，另一端通过导线与单片机82连接，单片机82可分别控制四个继电器83电源的通断，从而控制四个电磁阀84的通断；所述的单片机82采用STM32F103VE型单片机，可完成四个气体流量计81数据读取，并根据实测流量自动选择最优量程流量计所在分支管路，自动控制四个继电器83电源的通断，从而控制四条管路上四个电磁阀84的通断，实现最优量程流量计所在分支管路上气体的流通和其他分支管路气体的阻断；所述的气体流量计81、单片机82、四个继电器83、四个电磁阀84协同工作，可以实现各分支管道自动切换，连续自动监测三轴渗流室1出气孔112的气体流量。
如图2所示，所述的三轴渗流室1包括外壳、内腔，外壳外安装有温度感控装置3，内腔内安装有变形监测装置2；
所述的三轴渗流室1外壳由底座11、顶盖12和侧环13组成，均由不锈钢制成；所述的底座11和侧环13之间通过四个水平向螺栓17紧密连接在一起；所述的底座11与侧环13、顶盖12与侧环13的接缝处通过两条O形圈14密封；所述的底座11内设有进气孔111、出气孔112和供水孔113；所述的顶盖12顶部设有排气孔121、热探针孔122、承重轴孔123；
所述的三轴渗流室1内腔设置有四根三轴室支柱15、岩土体试样16、上方金属圆柱体18、下方金属圆柱体19；所述的三轴渗流室1内腔可充填液体；所述的四根三轴室支柱15垂直连接于底座11与顶盖12之间，沿底座11圆周方向等距设置，起底座11与顶盖12之间支撑固定作用；所述的岩土体试样16为被测试验材料，安装于上方金属圆柱体18和下方金属圆柱体19之间；所述的上方金属圆柱体18、下方金属圆柱体19的横截面尺寸与岩土体试样16的横截面尺寸相同，试验中使用高强度乳胶膜包裹在上方金属圆柱体18、下方金属圆柱体19、岩土体试样16外侧，使三者之间紧密接触，不发生脱离；所述的上方金属圆柱体18、下方金属圆柱体19内设有通气孔，上方金属圆柱体18通气孔底端、下方金属圆柱体19通气孔顶端与岩土体试样16直接连通；上方金属圆柱体18通气孔顶端通过导管与底座11出气孔112顶端连接，下方金属圆柱体19通气孔底端与底座11进气孔111顶端连接；
所述的变形监测装置2安装在三轴渗流室1内腔内，由十二个电涡流传感器21、四个变形监测架22、十二个金属贴片23组成；所述的电涡流传感器21采用AEC-55MS-Z-52型变换器，十二个电涡流传感器21分为四组，每组三个沿岩土体试样16高度等距固定在变形监测架22上；所述的四个变形监测架22沿岩土体试样16圆周方向等距布设，其底部固定在三轴渗流室1底座11上；所述的十二个金属贴片23分为四组，每组三个沿岩土体试样16高度等距粘附在岩土体试样16外高强度乳胶膜外表面，四组金属贴片23沿岩土体试样16圆周方向等距布设，金属贴片23位置与电涡流传感器21探头正对，两者之间保持2～4 mm距离；所述的电涡流传感器21可精确测量金属贴片23与探头端面之间静态和动态的相对位移变化，通过实时监测金属贴片23相对位移来间接获得渗透过程中岩土体试样17的局部绝对变形量（量程为±4 mm，其精度可达到0.3～0.5 μm）。
所述的温度感控装置3安装在三轴渗流室1外壳外，包括加热器31、温度控制器32、热探针33；所述的加热器31采用SAQ300型恒温加热器，包裹在三轴渗流室1侧环13外侧，通过对不锈钢材料制成的侧环13加热，间接将热量传导给三轴渗透室1内腔充填的液体；所述的温度控制器32采用CHB000B型温控器，通过导线与加热器31连接，可根据温度设定值和热探针33测量的三轴渗流室1内腔液体温度自动控制加热器31电源的通断；所述的热探针33采用WRP-130型热电偶，通过热探针孔122将探头伸入三轴渗流室1内腔液体中，可用于测量的三轴渗流室1内腔液体的温度，再通过导线将实时测量温度数据传输给温度控制器32；所述的加热器31、温度控制器32、热探针33三者共同构成闭环控制装置，可精确控制被测岩土体试样在渗透试验过程中的温度，温控范围为20～100 ℃。
如图3所示，所述的偏应力加载装置5由横梁51、称重传感器52、承重轴53、轴承54、操作平台55、载荷速度控制器56、竖轴57、立柱58组成；所述的两根立柱58垂直固定于操作平台上55，起固定和支撑作用；所述的横梁51固定在立柱58上；所述的竖轴57固定在横梁中间；所述的称重传感器52采用RCD-100kN型荷重变换器，固定于竖轴57底端，用于测量轴向荷载的大小，传感器量程为0～100 kN；所述的承重轴53穿过三轴渗流室1顶盖12承重轴孔123，其顶端与称重传感器52相连，底端与上方金属圆柱体18顶端相连，用于传递自下而上的轴向荷载；所述的轴承54设置在顶盖12承重轴孔123内壁上，与承重轴53侧壁接触，可以在保持承重轴53绝对位置固定的条件下，三轴渗流室1整体上升或下降；所述的载荷速度控制器56采用EM SERVO CONTROLLER KO-470型控制器，主体部分安装于操作平台55内部，顶部伸出操作平台55并与三轴渗流室1的底座11接触，用于抬升或降低三轴渗流室1底座11，从而使三轴渗流室1整体上升或下降；由于顶部的承重轴53绝对位置固定，三轴渗流室1整体上升或下降可以实现对岩土体试样17施加或卸除轴压荷载，轴向荷载范围为0～100kN，载荷速度范围为0.01～100 kN/min。
 
本申请提供的测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统，其工作流程如下：
试验前，三轴渗流室1底座11、顶盖12、侧环13、三轴室支柱15分离，变形监测装置2未安装，体积/压力控制器4、气体注入装置6、出口缓冲容器7、超低渗流量监测装置8管路连接完整、处于关闭状态；
1）  首先将岩土体试样16、上方金属圆柱体18依次放置在下方金属圆柱体19上，外侧用高强度乳胶膜包裹好，使三者之间紧密接触，不发生脱离；再将该组合体安装到三轴渗流室1内，下方金属圆柱体19底部固定在底座上11，并保证下方金属圆柱体19通气孔底端与进气孔111顶端连接；利用导管将上方金属圆柱体18通气孔顶端与出气孔112顶端连接；
2）  将四个变形监测架22沿岩土体试样16圆周方向等距固定在三轴渗流室1底座11上；再将十二个电涡流传感器21分为四组，每组三个沿岩土体试样16高度等距固定在变形监测架22上；再将十二个金属贴片按照电涡流传感器21对应位置附在岩土体试样16外高强度乳胶膜外表面，并保证与电涡流传感器21探头之间保持2～4 mm距离；
3）  利用三轴室支柱15将底座11、顶盖12固定连接；将承重轴53从顶盖12的承重轴孔123内穿入三轴渗流室1内腔，使其底端与上方金属圆柱体18顶端相连；再将三轴渗流室1的侧环13安装到底座11与顶盖12外侧，并拧紧底座11和侧环13位置处的四个螺栓17；
4）  三轴渗流室1组装完成后，利用滑轮将其放置到操作平台55上，调整偏应力加载装置5载荷速度控制器56使其顶部伸出操作平台55的部分与三轴渗流室1底座11接触；将称重传感器52安装到承重轴53顶端，调整偏应力加载装置5竖轴57位置，使竖轴57、称重传感器52、承重轴53三者之间紧密接触；
5）  打开排气孔121，利用体积/压力控制器4向三轴渗透室1内腔注入液体；关闭排气孔121，利用体积/压力控制器4向三轴渗透室1内腔液体施加目标压力（需大于气/液压转换装置64气体注入压力），从而对岩土体试样16施加围压；同时，通过设置载荷速度控制器56对岩土体试样17施加轴向荷载；
6）  待岩土体试样17轴向、径向压力到达目标值且变形稳定后，对温度感控装置3通电使加热器31加热，利用温度控制器32设置三轴渗流室1内液体的温度，通过热探针33实时测量三轴渗流室1内液体的温度，温度控制器32将根据热探针33实时采集数据自动控制加热器31电源的通断；
7）  待三轴渗流室1内液体温度到达目标值并稳定后，启动增压泵62将氦气增压至目标压力，并把目标压力气体通过气体缓冲容器63输入到气/液压转换装置64气压端；
8）  启动无限体积控制器61将液体输入到气/液压转换装置64液压端，以液压驱动气压的方式，使气/液压转换装置64气压端内高压气体以恒定体积、压力或者速率的方式稳定输入到三轴渗流室1进气孔111，从而使高压气体注入到岩土体试样16中。
9）  高压气体在经过岩土体试样17渗透后，由出气孔112进入出口缓冲容器7，在此缓冲之后通过超低渗流量监测装置8测量气体的渗透速率，从而计算气体在岩土体试样17中的渗透系数。
10）            收集气体渗透过程中电涡流传感器21监测得到岩土体试样17径向变形数据，综合评估气体渗透性能，体渗透率的计算公式为：
Figure 68371dest_path_image001
式中，
Figure 617164dest_path_image002
为气体渗透率，用于评价气体渗透性能；μ为气体的动力粘度，为固定常数；
Figure 236364dest_path_image003
为超低渗流量监测装置8所量测的气体流量；A为岩土体试样17的横截面积；h为岩土体试样17的高度；
Figure 237818dest_path_image004
为气体注入装置6注入岩土体试样17的压力；
Figure 233456dest_path_image005
为大气压力。
上述描述仅是对本申请较佳实施例的描述，并非是对本申请范围的任何限定，任何熟悉该领域的普通技术人员根据上述揭示的技术内容做出的任何变更或修饰均应当视为等同的有效实施例，均属于本申请技术方案保护的范围。
 

Claims (9)

  1. 测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统，其特征在于：包括三轴渗流室、变形监测装置、温度感控装置、体积/压力控制器、偏应力加载装置、气体注入装置、出口缓冲容器、超低渗流量监测装置。试验过程中，首先对岩土体试样施加温度和三轴应力控制；利用气体注入装置向岩土体试样注入高压气体，高压气体经过渗透后进入出口缓冲容器和超低渗流量监测装置，获得气体渗透流量；变形监测装置可在试验过程中测量岩土体试样的局部绝对变形量。本申请提供的方案，其有益效果在于：实现了多场多相耦合条件下超低渗介质的气体渗透的全过程监测，能够获得气体渗透特性和宏观变形特性。
  2. 根据权利要求1所述的测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统，其特征在于：所述的三轴渗流室是试验系统的主体部分，包括外壳、内腔；
    所述的三轴渗流室外壳由底座、顶盖和侧环组成，均由不锈钢制成；所述的底座和侧环之间通过若干个水平向螺栓紧密连接在一起；所述的底座与侧环、顶盖与侧环的接缝处采用若干条O形圈密封；所述的底座内设有进气孔、出气孔和供水孔；所述的顶盖顶部设有排气孔、热探针孔、承重轴孔；
    所述的三轴渗流室内腔设置有若干根三轴室支柱、岩土体试样、上方金属圆柱体、下方金属圆柱体；所述的三轴渗流室内腔可充填液体；所述的若干根三轴室支柱垂直连接于底座与顶盖之间，沿底座圆周方向等距设置，起底座与顶盖之间支撑固定作用；所述的岩土体试样为被测试验材料，安装于上方金属圆柱体和下方金属圆柱体之间；所述的上方金属圆柱体、下方金属圆柱体的横截面尺寸与岩土体试样的横截面尺寸相同；所述的上方金属圆柱体、下方金属圆柱体内设有通气孔，上方金属圆柱体通气孔底端、下方金属圆柱体通气孔顶端与岩土体试样直接连通；上方金属圆柱体通气孔顶端通过导管与底座出气孔顶端连接，下方金属圆柱体通气孔底端与底座进气孔顶端连接。
  3. 根据权利要求1所述的测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统，其特征在于：所述的变形监测装置安装在三轴渗流室内腔内，由若干个电涡流传感器、若干个变形监测架、若干个金属贴片组成；
    所述的若干个电涡流传感器固定在变形监测架上，并分别沿岩土体试样高度、圆周方向等距布设在岩土体试样周围；所述的若干个变形监测架沿岩土体试样圆周方向等距布设；所述的金属贴片分别沿岩土体试样高度、圆周方向等距粘附在岩土体试样外高强度乳胶膜外表面，与电涡流传感器探头正对并保持一定距离；所述的电涡流传感器可精确测量金属贴片与探头端面之间静态和动态的相对位移变化，通过实时监测金属贴片相对位移来间接获得渗透过程中岩土体试样的局部绝对变形量。
  4. 根据权利要求1所述的测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统，其特征在于：所述的温度感控装置安装在三轴渗流室外壳外，包括加热器、温度控制器、热探针；
    所述的加热器包裹在三轴渗流室侧环外侧，通过对不锈钢材料制成的侧环加热，间接将热量传导给三轴渗透室内腔充填的液体；所述的温度控制器通过导线与加热器连接，可根据温度设定值和热探针测量的三轴渗流室内腔液体温度自动控制加热器电源的通断；所述的热探针通过热探针孔将探头伸入三轴渗流室内腔液体中，可用于测量的三轴渗流室内腔液体的温度，再通过导线将实时测量温度数据传输给温度控制器；所述的加热器、温度控制器、热探针三者共同构成闭环控制装置，可精确控制被测岩土体试样在渗透试验过程中的温度。
  5. 根据权利要求1所述的测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统，其特征在于：所述的体积/压力控制器通过导管与三轴渗透室供水孔相连；对于组装好的三轴渗透室，当排气孔打开时体积/压力控制器可向三轴渗透室内腔注入或排出液体，当排气孔关闭时可向三轴渗透室内腔液体施加压力，从而对岩土体试样施加围压。
  6. 根据权利要求1所述的测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统，其特征在于：所述的偏应力加载装置由横梁、称重传感器、承重轴、轴承、操作平台、载荷速度控制器、竖轴、立柱组成；
    所述的两根立柱垂直固定于操作平台上，起固定和支撑作用；所述的横梁固定在立柱上；所述的竖轴固定在横梁中间；所述的称重传感器固定于竖轴底端，用于测量轴向荷载的大小；所述的承重轴穿过三轴渗流室顶盖承重轴孔，其顶端与称重传感器相连，底端与上方金属圆柱体顶端相连，用于传递自下而上的轴向荷载；所述的轴承设置在顶盖承重轴孔内壁上，与承重轴侧壁接触，可以在保持承重轴绝对位置固定的条件下，三轴渗流室整体上升或下降；所述的载荷速度控制器主体部分安装于操作平台内部，顶部伸出操作平台并与三轴渗流室的底座接触，用于抬升或降低三轴渗流室底座，从而使三轴渗流室整体上升或下降；由于顶部的承重轴绝对位置固定，三轴渗流室整体上升或下降可以实现对岩土体试样施加或卸除轴压荷载。
  7. 根据权利要求1所述的测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统，其特征在于：所述的气体注入装置由无限体积控制器、增压泵、气体缓冲容器、气/液压转换装置组成；
    所述的无限体积控制器与气/液压转换装置液压端之间通过导管相连，无限体积控制器内液体可以以恒定体积、压力以及速率的方式输入到气/液压转换装置液压端；所述的增压泵以压缩空气作为动力源，可以对氦气增压并通过导管送入气体缓冲容器；所述的气体缓冲容器通过导管一端与增压泵相连，另一端通过导管与气/液压转换装置气压端相连，可将增压泵送来的高压气体在此缓冲后再送入气/液压转换装置气压端；所述的气/液压转换装置由高强度不锈钢制成，气/液压转换装置液压端与无限体积控制器通过导管连接，气压端与气体缓冲容器通过导管连接，内部使用活塞将气压端与液压端隔离；通过无限体积控制器向气/液压转换装置内输入液压，在气/液压转换装置内部通过活塞将液压转换为恒定体积、压力以及速率的气压，再通过导管将气/液压转换装置气压端内高压气体输入到三轴渗流室进气孔，从而使高压气体注入到岩土体试样中。
  8. 根据权利要求1所述的测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统，其特征在于：所述的出口缓冲容器一端通过导管与三轴渗流室出气孔相连，另一端通过导管与超低渗流量监测装置相连；从三轴渗流室出气孔出来的气体在此缓冲以后，通过超低渗流量监测装置测量流量；出口缓冲容器底部还设有安全阀和排气阀，当出口缓冲容器内的压力超过安全阀上限压力时能自动泄压，保障安全；所述的排气阀用于试验结束后手动排空出口缓冲容器内的气体。
  9. 根据权利要求1所述的测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统，其特征在于：所述的超低渗流量监测装置包括四个气体流量计、单片机、四个继电器、四个电磁阀；
    从出口缓冲容器出口端出来的气体将会流入四条分支管道；所述的四个气体流量计分别安装于四条分支管道上，用于测量该管道气体流量，四个气体流量计量程不同；四个气体流量计与单片机之间通过导线连接，可向单片机输出流量数字信号；所述的四个电磁阀分别安装于四条分支管道上，可控制该分支管道上气体的通断；所述的四个继电器一端分别通过导线与四个电磁阀连接，另一端通过导线与单片机连接，单片机可分别控制四个继电器电源的通断，从而控制四个电磁阀的通断；所述的单片机可完成四个气体流量计数据读取，并根据实测流量自动选择最优量程流量计所在分支管路，自动控制四个继电器电源的通断，从而控制四条管路上四个电磁阀的通断，实现最优量程流量计所在分支管路上气体的流通和其他分支管路气体的阻断；所述的气体流量计、单片机、四个继电器、四个电磁阀协同工作，可以实现各分支管道自动切换，连续自动监测三轴渗流室出气孔的气体流量。
PCT/CN2020/121324 2020-01-17 2020-10-15 测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统 WO2021143229A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010053478.6A CN111122416B (zh) 2020-01-17 2020-01-17 测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统
CN202010053478.6 2020-01-17

Publications (1)

Publication Number Publication Date
WO2021143229A1 true WO2021143229A1 (zh) 2021-07-22

Family

ID=70489845

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/121324 WO2021143229A1 (zh) 2020-01-17 2020-10-15 测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统

Country Status (2)

Country Link
CN (1) CN111122416B (zh)
WO (1) WO2021143229A1 (zh)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113654968A (zh) * 2021-08-30 2021-11-16 中国矿业大学 一种低渗介质气体渗透性测试装置及其安装、测试方法
CN113899671A (zh) * 2021-09-06 2022-01-07 合肥工业大学 干湿循环下温度-应力一体化控制的柔性壁渗透试验方法
CN113959939A (zh) * 2021-10-14 2022-01-21 陕西科技大学 一种磁流变液板-液界面摩擦系数测量装置及其工作方法
CN113984614A (zh) * 2021-09-16 2022-01-28 河海大学 模拟温度-渗流-应力耦合的渗透溶蚀试验装置及方法
CN114034623A (zh) * 2021-11-22 2022-02-11 山东科技大学 一种非均布荷载作用下应力-渗流耦合演化可视化系统
CN114062143A (zh) * 2021-11-30 2022-02-18 重庆大学 高压电脉冲原位增透含气储层两相渗流试验装置
CN114112834A (zh) * 2021-11-03 2022-03-01 中国电建集团华东勘测设计研究院有限公司 一种多功能土柱固结渗透模型试验系统
CN114166643A (zh) * 2021-12-08 2022-03-11 中国科学院武汉岩土力学研究所 一种高气压卸荷致裂试验系统
CN114199739A (zh) * 2021-11-25 2022-03-18 中铁二十局集团第四工程有限公司 岩石化学腐蚀环境下co2三轴渗流测试系统及方法
CN114279936A (zh) * 2021-12-29 2022-04-05 西南石油大学 一种油气井水泥浆凝固过程中动态渗透率测试装置及方法
CN114441407A (zh) * 2022-01-14 2022-05-06 合肥综合性国家科学中心能源研究院(安徽省能源实验室) 低渗煤岩co2驱替过程动态可视化模拟试验系统与方法
CN114459960A (zh) * 2022-02-10 2022-05-10 辽宁工程技术大学 一种矿山地下水污染的多场耦合模拟试验装置及方法
CN114544461A (zh) * 2022-02-15 2022-05-27 中国矿业大学 一种超临界co2封存与损伤监测试验系统及方法
CN114778433A (zh) * 2022-04-28 2022-07-22 中国矿业大学 一种氢气存储密封层力学行为测试装置及方法
CN114965224A (zh) * 2022-06-10 2022-08-30 东北林业大学 一种多功能岩土渗透系数测定装置及测试方法
CN115372199A (zh) * 2022-10-27 2022-11-22 山东德瑞克分析仪器有限公司 一种抗血液传播病原体口罩的渗透测试装置
CN115406738A (zh) * 2022-10-13 2022-11-29 水利部交通运输部国家能源局南京水利科学研究院 一种防堵塞的微生物温控注浆加固一体化三轴试验装置
CN115561123A (zh) * 2022-09-19 2023-01-03 北京科技大学 气相氢环境下金属管材的氢渗透实验装置及实验方法
CN116430916A (zh) * 2023-06-08 2023-07-14 北京科技大学 基于渗透法精确控制小腔体气体压强集成装置及测试方法
CN117110172A (zh) * 2023-10-24 2023-11-24 中国矿业大学 一种气体渗流启动压力梯度测试装置及应用方法
CN117825261A (zh) * 2024-03-06 2024-04-05 山东大学 一种考虑空间渗流特性的石膏岩溶蚀实验系统及方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111122416B (zh) * 2020-01-17 2021-12-07 同济大学 测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统
CN112748230B (zh) * 2020-12-16 2022-03-15 中国科学院武汉岩土力学研究所 一种用于含气土样制备的溶气平衡监测系统及方法
CN113702272B (zh) * 2021-08-24 2023-01-31 上海交通大学 一种多场耦合环境中非饱和膨润土溶蚀试验系统及方法
CN114324109A (zh) * 2021-12-28 2022-04-12 临海伟星新型建材有限公司 一种内衬管气体渗透检测装置
CN114324108A (zh) * 2021-12-28 2022-04-12 临海伟星新型建材有限公司 一种内穿插管道气体渗透检测装置及操作方法
CN114659939A (zh) * 2021-12-30 2022-06-24 江苏科技大学 一种用于塑性混凝土的污染物迁移土柱装置及其试验方法
CN114441409B (zh) * 2022-01-26 2024-03-26 中国人民解放军63653部队 获取Pu(IV)在压实粘土柱中动态分配系数的方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000009988A2 (en) * 1998-08-11 2000-02-24 The Penn State Research Foundation Rapid method to experimentally measure the gas permeability of micro-perforated films
CN207379888U (zh) * 2017-11-03 2018-05-18 青岛海洋地质研究所 三轴应力条件下含水合物沉积物渗透率测量装置
CN108414418A (zh) * 2018-01-31 2018-08-17 中国矿业大学 一种三轴渗透率测试方法
CN208224038U (zh) * 2018-05-11 2018-12-11 湖北工业大学 一种用恒流量实时测岩石破坏过程中渗透率的实验装置
CN110231269A (zh) * 2019-05-31 2019-09-13 中国地质大学（武汉） 一种黏土岩的可视化真三轴加卸载渗流试验设备
CN110345904A (zh) * 2019-06-06 2019-10-18 山东科技大学 水合物分解过程中沉积物变形及渗透率测试装置及方法
CN111122416A (zh) * 2020-01-17 2020-05-08 同济大学 测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1815175A (zh) * 2006-02-07 2006-08-09 同济大学 单轴压应力下混凝土气体渗透系数测试仪及其测试方法
JPWO2011132391A1 (ja) * 2010-04-23 2013-07-18 株式会社アルバック 透湿度測定装置及び透湿度測定方法
CN104655495B (zh) * 2015-02-13 2017-05-10 太原理工大学 一种煤岩高温高压真三轴压裂渗流试验装置与试验方法
CN205826476U (zh) * 2016-05-19 2016-12-21 湖南科技大学 一种岩石渗透系数测量装置
CN109211753B (zh) * 2018-09-18 2021-02-05 辽宁工程技术大学 一种扰动作用下岩石多场、多相渗流实验装置
CN109459367B (zh) * 2018-11-23 2021-04-16 成都理工大学 一种实现多场耦合及原位干湿循环的渗透方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000009988A2 (en) * 1998-08-11 2000-02-24 The Penn State Research Foundation Rapid method to experimentally measure the gas permeability of micro-perforated films
CN207379888U (zh) * 2017-11-03 2018-05-18 青岛海洋地质研究所 三轴应力条件下含水合物沉积物渗透率测量装置
CN108414418A (zh) * 2018-01-31 2018-08-17 中国矿业大学 一种三轴渗透率测试方法
CN208224038U (zh) * 2018-05-11 2018-12-11 湖北工业大学 一种用恒流量实时测岩石破坏过程中渗透率的实验装置
CN110231269A (zh) * 2019-05-31 2019-09-13 中国地质大学（武汉） 一种黏土岩的可视化真三轴加卸载渗流试验设备
CN110345904A (zh) * 2019-06-06 2019-10-18 山东科技大学 水合物分解过程中沉积物变形及渗透率测试装置及方法
CN111122416A (zh) * 2020-01-17 2020-05-08 同济大学 测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113654968A (zh) * 2021-08-30 2021-11-16 中国矿业大学 一种低渗介质气体渗透性测试装置及其安装、测试方法
CN113899671A (zh) * 2021-09-06 2022-01-07 合肥工业大学 干湿循环下温度-应力一体化控制的柔性壁渗透试验方法
CN113899671B (zh) * 2021-09-06 2023-06-30 合肥工业大学 干湿循环下温度-应力一体化控制的柔性壁渗透试验方法
CN113984614A (zh) * 2021-09-16 2022-01-28 河海大学 模拟温度-渗流-应力耦合的渗透溶蚀试验装置及方法
CN113959939B (zh) * 2021-10-14 2024-04-09 陕西科技大学 一种磁流变液板-液界面摩擦系数测量装置及其工作方法
CN113959939A (zh) * 2021-10-14 2022-01-21 陕西科技大学 一种磁流变液板-液界面摩擦系数测量装置及其工作方法
CN114112834B (zh) * 2021-11-03 2023-11-17 中国电建集团华东勘测设计研究院有限公司 一种多功能土柱固结渗透模型试验系统
CN114112834A (zh) * 2021-11-03 2022-03-01 中国电建集团华东勘测设计研究院有限公司 一种多功能土柱固结渗透模型试验系统
CN114034623A (zh) * 2021-11-22 2022-02-11 山东科技大学 一种非均布荷载作用下应力-渗流耦合演化可视化系统
CN114199739A (zh) * 2021-11-25 2022-03-18 中铁二十局集团第四工程有限公司 岩石化学腐蚀环境下co2三轴渗流测试系统及方法
CN114199739B (zh) * 2021-11-25 2024-03-29 中铁二十局集团第四工程有限公司 岩石化学腐蚀环境下co2三轴渗流测试系统及方法
CN114062143B (zh) * 2021-11-30 2022-07-29 重庆大学 高压电脉冲原位增透含气储层两相渗流试验装置
CN114062143A (zh) * 2021-11-30 2022-02-18 重庆大学 高压电脉冲原位增透含气储层两相渗流试验装置
CN114166643A (zh) * 2021-12-08 2022-03-11 中国科学院武汉岩土力学研究所 一种高气压卸荷致裂试验系统
CN114279936A (zh) * 2021-12-29 2022-04-05 西南石油大学 一种油气井水泥浆凝固过程中动态渗透率测试装置及方法
CN114279936B (zh) * 2021-12-29 2023-09-15 西南石油大学 一种油气井水泥浆凝固过程中动态渗透率测试装置及方法
CN114441407A (zh) * 2022-01-14 2022-05-06 合肥综合性国家科学中心能源研究院(安徽省能源实验室) 低渗煤岩co2驱替过程动态可视化模拟试验系统与方法
CN114459960A (zh) * 2022-02-10 2022-05-10 辽宁工程技术大学 一种矿山地下水污染的多场耦合模拟试验装置及方法
CN114459960B (zh) * 2022-02-10 2024-05-14 辽宁工程技术大学 一种矿山地下水污染的多场耦合模拟试验装置及方法
CN114544461B (zh) * 2022-02-15 2023-11-21 中国矿业大学 一种超临界co2封存与损伤监测试验系统及方法
CN114544461A (zh) * 2022-02-15 2022-05-27 中国矿业大学 一种超临界co2封存与损伤监测试验系统及方法
CN114778433A (zh) * 2022-04-28 2022-07-22 中国矿业大学 一种氢气存储密封层力学行为测试装置及方法
CN114778433B (zh) * 2022-04-28 2023-09-22 中国矿业大学 一种氢气存储密封层力学行为测试装置及方法
CN114965224B (zh) * 2022-06-10 2023-03-03 东北林业大学 一种多功能岩土渗透系数测定装置及测试方法
CN114965224A (zh) * 2022-06-10 2022-08-30 东北林业大学 一种多功能岩土渗透系数测定装置及测试方法
CN115561123A (zh) * 2022-09-19 2023-01-03 北京科技大学 气相氢环境下金属管材的氢渗透实验装置及实验方法
CN115561123B (zh) * 2022-09-19 2024-05-14 北京科技大学 气相氢环境下金属管材的氢渗透实验装置及实验方法
CN115406738A (zh) * 2022-10-13 2022-11-29 水利部交通运输部国家能源局南京水利科学研究院 一种防堵塞的微生物温控注浆加固一体化三轴试验装置
CN115372199A (zh) * 2022-10-27 2022-11-22 山东德瑞克分析仪器有限公司 一种抗血液传播病原体口罩的渗透测试装置
CN115372199B (zh) * 2022-10-27 2023-02-07 山东德瑞克仪器股份有限公司 一种抗血液传播病原体口罩的渗透测试装置
CN116430916B (zh) * 2023-06-08 2023-09-29 北京科技大学 基于渗透法精确控制小腔体气体压强集成装置及测试方法
CN116430916A (zh) * 2023-06-08 2023-07-14 北京科技大学 基于渗透法精确控制小腔体气体压强集成装置及测试方法
CN117110172B (zh) * 2023-10-24 2024-01-19 中国矿业大学 一种气体渗流启动压力梯度测试装置及应用方法
CN117110172A (zh) * 2023-10-24 2023-11-24 中国矿业大学 一种气体渗流启动压力梯度测试装置及应用方法
CN117825261A (zh) * 2024-03-06 2024-04-05 山东大学 一种考虑空间渗流特性的石膏岩溶蚀实验系统及方法
CN117825261B (zh) * 2024-03-06 2024-05-14 山东大学 一种考虑空间渗流特性的石膏岩溶蚀实验系统及方法

Also Published As

Publication number Publication date
CN111122416B (zh) 2021-12-07
CN111122416A (zh) 2020-05-08

Similar Documents

Publication Publication Date Title
WO2021143229A1 (zh) 测量多场多相耦合条件下超低渗介质气体渗透参数的试验系统
CN103116014B (zh) 大尺度高压土体冻融过程水-热-力耦合作用试验系统
CN105717027B (zh) 一种模拟地下深部岩体环境的岩石渗透性测试设备
CN205483943U (zh) 一种模拟泥水盾构中泥浆浸入地层形成泥膜的实验装置
CN106644750A (zh) 开放系统冻融土动静三轴测试仪
CN110082274A (zh) 大型原级配粗颗粒土水平渗透变形试验仪及试验方法
CN105334142B (zh) 一种用于模拟盾构泥膜形成的实验装置
CN104777089B (zh) 多场耦合条件下路面材料渗透性测试系统
CN110865014B (zh) 基于核磁共振的耦合作用下岩石孔渗模型测试装置及方法
KR101210838B1 (ko) 물을 이용한 시료의 투과율 측정 장치 및 그 방법
WO2020259637A1 (zh) 一种深地工程原位应力场和渗流场超重力模拟系统
CN103048261B (zh) 一种研究酸性流体作用下岩石物性参数变化的装置及方法
CN206223619U (zh) 一种水泥土渗透系数测试仪
CN113702272B (zh) 一种多场耦合环境中非饱和膨润土溶蚀试验系统及方法
CN110487988A (zh) 一种气压加载型一维固结渗透联合测试装置
CN114279818B (zh) 一种双向柔性加卸环剪装置及其试验方法
CN107167387A (zh) 一种滑带土流变试验仪以及滑带土流变试验方法
KR101215468B1 (ko) 이산화탄소를 이용한 시료의 투과율 측정 장치 및 방법
CN205262912U (zh) 一种用于模拟盾构泥膜形成的实验装置
CN206208673U (zh) 考虑渗流‑应力‑化学耦合的岩土体剪切流变仪
Ye et al. A new device for measuring the supercritical CO2 permeability in porous rocks under reservoir conditions
CN205719795U (zh) 复杂地下水环境下的基坑开挖模型试验装置
CN108120644A (zh) 一种气压作用下孔道岩石试件的蠕变试验装置与方法
CN107907467A (zh) 一种施加非均布载荷的真三轴渗流实验装置
CN205720219U (zh) 潜水位和承压水头协同升降的基坑开挖模型试验装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20914228

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20914228

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 31.03.2023)

122 Ep: pct application non-entry in european phase

Ref document number: 20914228

Country of ref document: EP

Kind code of ref document: A1