CN105510144B - A kind of parallel connection type rock temperature-seepage-pipe coupling model triaxial rheometer - Google Patents
A kind of parallel connection type rock temperature-seepage-pipe coupling model triaxial rheometer Download PDFInfo
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- CN105510144B CN105510144B CN201610060701.3A CN201610060701A CN105510144B CN 105510144 B CN105510144 B CN 105510144B CN 201610060701 A CN201610060701 A CN 201610060701A CN 105510144 B CN105510144 B CN 105510144B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0256—Triaxial, i.e. the forces being applied along three normal axes of the specimen
Abstract
The present invention relates to a kind of parallel connection type rock temperature-seepage-pipe coupling model triaxial rheometers, including loading frame, several triaxial cells are equipped in loading frame, the pressure head of each triaxial cell is connect with axis pressure servo-control system respectively, and each triaxial cell is connect by oil pipe with confining pressure servo-control system；Sample in each triaxial pressure room is connect by water pipe with pore pressure servo-control system；The outer wall of each triaxial cell is equipped with electric heating portion, and electric heating portion is connect with temperature control system；Axis pressure servo-control system, confining pressure servo-control system, pore pressure servo-control system and temperature control system are and acquisition and control system passes through circuit connection, stress field, seepage field and the temperature field of acquisition and control system real-time control sample, to measure Rheological Deformation of sample under the conditions of different temperature-seepage-pipe coupling models.The present invention can carry out the rheological test under the conditions of multiple groups different temperatures-seepage-pipe coupling model simultaneously.
Description
Technical field
The present invention relates to a kind of parallel connection type rock temperature-seepage-pipe coupling model triaxial rheometers, belong to underground engineering, rock
Geotechnological journey test apparatus technical field.This equipment can carry out the stream under the conditions of multiple groups different temperatures-seepage-pipe coupling model simultaneously
Become test, the research suitable for the long-term mechanical characteristic of rock soil medium under the conditions of temperature-seepage-pipe coupling model.
Background technique
In the underground storage of petroleum and liquefied natural gas, Development of Geothermal Resources, deep resource exploitation, the high geology for putting waste material
Disposition etc. is in engineering constructions, and all there is more, the coupled problem of multiphase, the complicated coupling between multiple physical field is acted on to engineering
Rock mass has very important influence steadily in the long term, is constantly subjected to the attention and concern of domestic and international researcher.Wherein, temperature
Coupled problem is in complex condition rock mass engineering project detail design, safety evaluation, stability analysis between field, seepage field and stress field
It is all had a very important significance with forecast assessment etc..
Geotechnical engineering Rheological Problems are just suggested as global problem from the 1960s, be current tackling of key scientific and technical problems and
The difficult point and hot spot of engineering practice, in the past few decades in, rheology of the vast researcher both domestic and external to geotechnical engineering
Problem has carried out a large amount of research work.Further, since geothermic gradient and the high decay put during nuke rubbish underground storage
Heat release, so that Rock And Soil is chronically under the influence of temperature-action of seepage-stress coupling.In temperature-seepage-pipe coupling model item
In the characteristic showed under part, non-linear rheological behavior and soft rock large deformation show especially prominent, and engineering rheology occurs
Duration it is long.Up to the present, ground temperature-seepage-pipe coupling model long-term rheological behavior research achievement extremely has
Limit, not yet grasps its Distortion Disciplinarian.Therefore, there is an urgent need to understand Rock And Soil in depth in temperature-action of seepage-stress coupling
Under rheological behavior.
The temperature of rock soil medium-seepage-pipe coupling model Rheological Problems was becoming domestic rock-soil mechanics research field in recent years
Hot and difficult issue, need to carry out a large amount of rheological test to grasp its Rheological Regularity.But due to rheology nonlinear characteristic and
Soft rock large deformation feature causes the period of rheological test long, and test period is at high cost, wants to the control precision and durability of instrument
Ask high, traditional rheological test device has been difficult to meet the requirement of long-term rheological test.
Application No. is 2007100535232 Chinese patents to disclose a kind of rock double linkage three axis rheogeniometer, including pressure
Force snesor, displacement sensor, Axial-running Out power cylinder piston, same axis pressure may be implemented in axial servo loading system, difference is enclosed
The triaxial rheological experiment of pressure, effectively improves test efficiency.The disadvantage is that stress loading can only be provided, and on the pressure chamber Liang Ge is
Under be arranged in series, share a set of axis pressure system, easily cause biggish frictional force, and two groups of triaxial rheological experiments must be set
Set identical axis pressure.Application No. is 2009100782332 patents to disclose " a kind of five-ganged rock uniaxle rheometer ", solution
Certainly the problem of is " test is only capable of the single test specimen such as loading every time ", and the technological means of use includes " servo loading system
Including five sets of adding carriers in parallel, every set adding carrier by upper bearing plate, lower bearing plate, precision lead screw, elevator, servo motor,
Manual modulation valve and test specimen be loaded ball seat composition ", the parallel connection type device can guarantee improve test efficiency on the basis of improve
The shortcomings that tandem type experimental rig, but still without the limitation of the simple stress loading of the traditional rheometer of breakthrough.Application No. is
201410734403 patent discloses " triaxial stress of CT real time scan, seepage flow, chemical Coupling rheological test system ", uses
Technological means be that " the triaxial pressure chamber size of invention pilot system is smaller, solves that current triaxial pressure chamber size is big to ask
Topic；And confining pressure, axis pressure and osmotic pressure are controlled using three closed loop servo metering pumps are accurate respectively ", the disadvantage is that the invention is only
Stress-seepage flow-chemical Coupling Rheological Problems are able to achieve, temperature-seepage-pipe coupling model loading form, test can not be used
As a result it can not reflect the rheological property of the rock soil medium under the conditions of different temperatures-seepage-pipe coupling model.
Summary of the invention
The purpose of the present invention is to overcome above-mentioned the deficiencies in the prior art, provide a kind of parallel connection type rock temperature-seepage flow-to answer
Couple of force closes triaxial rheometer, and multiple groups may be implemented, and coaxially three axis temperature-seepage flow-of pressure and temperature, identical confining pressure and pore pressure is not answered
Rheological test under the conditions of couple of force conjunction, the instrument versatility is good, and structure is simple, high reliablity, and can effectively accelerate to test
Speed shortens the test period, saves experimentation cost.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
A kind of parallel connection type rock temperature-seepage-pipe coupling model triaxial rheometer, including loading frame, the loading frame
Interior to be equipped with two or more triaxial cells, the pressure head of each triaxial cell connects with axis pressure servo-control system respectively
It connects, it is in parallel between each triaxial cell, and connect by oil pipe with confining pressure servo-control system；Each three axis pressure
The indoor sample of power is connect by water pipe with pore pressure servo-control system；The outer wall of each triaxial cell is equipped with electricity and adds
Hot portion, the electric heater unit are connect with temperature control system；Axis pressure servo-control system, confining pressure servo-control system,
Pore pressure servo-control system and temperature control system are and acquisition and control system is by circuit connection, and the data are adopted
Stress field, seepage field and the temperature field of collection and control system real-time control sample, to measure sample in different temperature-seepage flow-
Rheological Deformation under the conditions of stress coupling.
The pedestal of the loading frame is equipped with two or more triaxial cells, and the triaxial cell is constituted for holding
Receive the space of sample, the triaxial cell is equipped with the pressure head to apply axis pressure to the sample, and the pressure head passes through power transmission
Component is connect with the top of the loading frame.
Each triaxial cell is controlled using mutually independent axis pressure servo-control system and mutually independent temperature
System shares a confining pressure servo-control system and a pore pressure servo-control system.
Each triaxial cell is controlled using mutually independent axis pressure servo-control system and mutually independent temperature
System shares a confining pressure servo-control system and a pore pressure servo-control system, can not only save experimental rig and purchase
Cost, moreover it is possible to effectively overcome axis to press frictional force, but also when one of sample enters the tertiary creep stage, it is ensured that in addition one
The sample of a triaxial cell can also carry on test, effectively shorten the test period, save time cost.
Further, the triaxial cell is equipped with axial compressive force sensor, confining pressure pressure sensor, pore pressure pressure sensing
One or more of device, displacement sensor.
Further, each sensor is and the acquisition and control system passes through circuit connection.
Further, institute's displacement sensors are LVDT radial deformation sensor, closely coupled with the sample.
Further, pressure chamber's pressure head is equipped with to the amesdial that measures the sample axial displacement, and described thousand
Table and the acquisition and control system is divided to pass through circuit connection.
Further, the electric heating portion is Electrothermal ring, and the Electrothermal ring is wrapped in the outer of the triaxial cell
Surface.
Further, the Electrothermal ring is connect by temperature controller with the acquisition and control system.
Further, the rheometer is additionally provided with temperature sensor, the temperature sensor and data acquisition and control
System processed passes through circuit connection.
Further, the temperature sensor is set in triaxial pressure room and/or in Electrothermal ring.
If carrying out rheological test by the dry sample to identical confining pressure, hole pressure, if the axis pressure and temperature of dry sample can be with
It is identical to can also be different, axial stress-time graph, confining pressure-time graph, pore pressure-time song are recorded during test respectively
Line, temperature-time curve, axial displacement-time graph, radial displacement-time graph, and environment temperature is recorded in real time.
Compared with prior art, the present invention having the following advantages that and effect:
1, suitable for measuring rheological behavior of rock soil medium under the conditions of different temperatures-seepage-pipe coupling model, experimental system
It may be implemented to carry out multiple groups different temperatures-seepage-pipe coupling model state rheological test simultaneously.
It 2, can be with test temperature field, seepage field and the stress field of real-time control sample during testing.
3, system versatility is good, high reliablity, precision are high, and can shorten the test period, saves experimentation cost.
Detailed description of the invention
Fig. 1 is a kind of parallel connection type rock temperature-seepage-pipe coupling model triaxial rheometer structural schematic diagram.
Wherein: 1 --- loading frame；2 --- axial compressive force sensor；3 --- pressure chamber's pressure head；4 --- triaxial pressure
Room；5 --- LVDT radial deformation sensor；6 --- sample；7 --- pedestal；8 --- upper pore pressure pressure sensor；9 --- rolling
Ballscrew driving wheel；10 --- amesdial；11 --- control and data collection system；12 --- Electrothermal ring；13 --- temperature
Sensor；14 --- temperature controller；15a --- confining pressure servo loading system；15b --- pore pressure servo loading system；
15c --- axis presses servo loading system；16a --- confining pressure servo motor；16b --- pore pressure servo motor；16c --- axis pressure is watched
Take motor；17 --- confining pressure pressure sensor；18 --- lower opening pressure pressure sensor；.
Specific embodiment
According to Fig. 1, this test equipment include: dedicated triaxial cell 4, axis pressure servo-control system (passed by axial compressive force
Sensor 2, ball-screw driving wheel 9, control and data collection system 11, axis press servo loading system 15c, and axis presses servo motor
16c composition), confining pressure servo-control system (by control with data collection system 11, confining pressure servo loading system 15a, confining pressure servo
Motor 16a, confining pressure pressure sensor 17 form), pore pressure servo-control system (by upper pore pressure pressure sensor 8, control and data
Acquisition system 11, pore pressure servo loading system 15b, pore pressure servo motor 16b, lower opening pressure pressure sensor 18 form), temperature control
System processed (by control and data collection system 11, Electrothermal ring 12, temperature sensor 13, temperature controller 14 formed), control
It is constituted with the equal part of data collection system 11, the instrument connection relationship are as follows:
Loading frame 1 is connected with axial compressive force sensor 2 by circle interface, and effect is to apply and measure axial lotus
It carries；
The triaxial cell Liang Ge 4 is connected with the pedestal 7 of loading frame, and effect is sealing sample and applies to sample axial
Load；
Triaxial cell 4 is connected with sample 6, and effect is to provide the space of sample installation, and ensures axis pressure, confining pressure, hole
The application of pressure and temperature；
Triaxial cell 4 is connected with axial compressive force sensor 2 by pressure chamber's pressure head 3, axial compressive force sensor 2 and axis pressure
Servo loading system 15c is connected by cable, and servo motor 16c and axis pressure servo loading system 15c are made by cable connection
With being to provide stable axis pressure.
In addition, axial compressive force sensor 2 can also be located at the pressure head in triaxial pressure room.
Triaxial cell 4 is connected with confining pressure pressure sensor 17 by oil pipe, confining pressure pressure sensor 17 and confining pressure servo
Loading system 15a is connected by oil pipe, and confining pressure servo motor 16a and confining pressure servo loading system 15a are made by cable connection
With being to provide stable confining pressure；
Sample 6 in triaxial pressure room passes through water pipe phase with upper pore pressure pressure sensor 8 and lower opening pressure pressure sensor 18
It connects, upper pore pressure pressure sensor 8 and lower opening pressure pressure sensor 18 are connected with pore pressure servo loading system 15b by water pipe, hole
Press servo motor 16b and pore pressure servo loading system 15b by cable connection, effect is to provide stable pore pressure；
Electric heating portion is Electrothermal ring 12.Electrothermal ring 12 is wrapped in the outer surface in the middle part of triaxial cell, two temperature
Sensor 13 is respectively placed in Electrothermal ring in (one) and triaxial pressure room (one), Electrothermal ring 12, temperature sensor 13
With temperature controller 14 by cable connection, temperature needed for effect is to provide test.
Other conventional electric heating elements, such as electric heating tube, electric boiling plate, also within the scope of protection of this application.
Axis pressure servo-control system and control is connected with data collection system 11 by cable, effect be in real time record with
Axial stress during Control experiment；
Confining pressure servo-control system and control be connected with data collection system 11 by cable, effect be in real time record with
Confining pressure during Control experiment；
Pore pressure servo-control system and control be connected with data collection system 11 by cable, effect be in real time record with
Pore pressure during Control experiment；
Temperature control system and control are connected with data collection system 11 by cable, and effect is real-time record and control
Temperature during test；
Amesdial 10 is connected with pressure chamber's pressure head 3, and effect is the Axial creep displacement measured in creep process；
Amesdial 10 is connected with control with data collection system 11 by cable, and effect is in real-time record creep process
The axial displacement of sample；
LVDT radial deformation sensor 5 is closely coupled with sample 6, and effect is the radial deformation for measuring sample；
LVDT radial deformation sensor 5 is connected with control with data collection system 11 by cable, and effect is to remember in real time
Record the radial displacement of sample in creep process；
Sample 6 is connected with triaxial cell 4, LVDT radial deformation sensor 5, is the measured main body of test.
Triaxial cell: size is designed according to specimen size requirement, and domestic testing machine factory can produce；
Controller: German EDC220 series
Computer: Dell
LVDT radial deformation sensor: MTS RS series
Axial compressive force sensor: HBM Load Cell Z6
Loading frame: domestic testing machine factory can produce
Axial servo loading system: domestic testing machine factory can produce
Confining pressure, pore pressure servo loading system: domestic testing machine factory can produce
Axial servo motor: MSMD082P1 series
Confining pressure servo motor: MSMD082P1 series
Pore pressure servo motor: MSMD082P1 series
The above main component all can be from market purchasing or processing.
According to Fig. 1, test sample is put into triaxial cell 4, passes through control and 11 pairs of data collection system examinations
Sample 6 applies certain axis pressure, confining pressure, pore pressure, temperature, passes using amesdial 10, LVDT radial deformation sensor 5, axial compressive force
Sensor 2, confining pressure pressure sensor 17 and pore pressure pressure sensor 8,18, the related letter such as strain and stress during acquisition test
Breath.
Above technical scheme realizes parallel connection type rock temperature-seepage-pipe coupling model triaxial rheometer and exists to rock soil medium
The test of Rheological Deformation under the conditions of different temperature-seepage-pipe coupling models, measurement cost is low and test accuracy is high, has wide
General future in engineering applications.
The situation that triaxial cell is two is listed in the present embodiment, when triaxial cell is greater than two, rheometer
Theory of constitution it is identical as this embodiment, all within the scope of protection of this application.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
A variety of modifications of embodiment will be readily apparent to those skilled in the art, it is as defined herein general
Principle can be realized in other embodiments without departing from the spirit or scope of the present invention, not be described in detail
Part, be the prior art, herein without repeating.Therefore, the present invention is not intended to be limited to these implementations shown in this article
Example, and it is to fit to the widest scope consistent with principles disclosed herein and feature.
Claims (4)
1. a kind of parallel connection type rock temperature-seepage-pipe coupling model triaxial rheometer, including loading frame, in the loading frame
Equipped with two or more triaxial cells, the triaxial cell is equipped with the pressure head to apply axis pressure to sample, and pressure head passes through
Force transferring part is connect with the top of the loading frame；The pressure head of each triaxial cell presses SERVO CONTROL system with axis respectively
System connects, in parallel between each triaxial cell, and is connect by oil pipe with confining pressure servo-control system；Each described three
The indoor sample of axis pressure is connect by water pipe with pore pressure servo-control system；The outer wall of each triaxial cell is equipped with
Electric heating portion, the electric heating portion are connect with temperature control system；The axis presses servo-control system, confining pressure SERVO CONTROL system
System, pore pressure servo-control system, temperature control system are and acquisition and control system is by circuit connection, and the data are adopted
Stress field, seepage field and the temperature field of collection and control system real-time control sample, to measure sample in different temperature-seepage flow-
Rheological Deformation under the conditions of stress coupling；
Each triaxial cell presses servo-control system and mutually independent temperature control system using mutually independent axis,
Share a confining pressure servo-control system and a pore pressure servo-control system；
The electric heating portion is Electrothermal ring, and the Electrothermal ring is wrapped in the outer surface of the triaxial cell；
The Electrothermal ring is connect by temperature controller with the acquisition and control system；
The rheometer is additionally provided with temperature sensor, and the temperature sensor and the acquisition and control system pass through circuit
Connection；The temperature sensor is set in triaxial pressure room and/or in Electrothermal ring；
If carrying out rheological test by the dry sample to identical confining pressure, hole pressure, if the axis pressure and temperature of dry sample can be identical
It can also be different, record axial stress-time graph, confining pressure-time graph, pore pressure-time graph, temperature during test respectively
Degree-time graph, axial displacement-time graph, radial displacement-time graph, and environment temperature is recorded in real time；
The triaxial cell is equipped with axial compressive force sensor, confining pressure pressure sensor, pore pressure pressure sensor, displacement sensor
One or more of.
2. a kind of parallel connection type rock temperature-seepage-pipe coupling model triaxial rheometer according to claim 1, feature exist
In: each sensor is and the acquisition and control system passes through circuit connection.
3. a kind of parallel connection type rock temperature-seepage-pipe coupling model triaxial rheometer according to claim 1, feature exist
In: institute's displacement sensors are LVDT radial deformation sensor, closely coupled with the sample.
4. one of -3 a kind of parallel connection type rock temperature-seepage-pipe coupling model triaxial rheometer according to claim 1,
Be characterized in that: pressure chamber's pressure head is equipped with the amesdial to measure the sample axial displacement, the amesdial and institute
It states acquisition and control system and passes through circuit connection.
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| CN201610060701.3A CN105510144B (en) | 2016-01-28 | 2016-01-28 | A kind of parallel connection type rock temperature-seepage-pipe coupling model triaxial rheometer |
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| CN201610060701.3A CN105510144B (en) | 2016-01-28 | 2016-01-28 | A kind of parallel connection type rock temperature-seepage-pipe coupling model triaxial rheometer |
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| CN106680105B (en) * | 2016-12-20 | 2019-11-01 | 安徽理工大学 | A kind of true triaxial rock test rig resistant to high temperature |
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| CN112859946B (en) * | 2021-01-15 | 2022-06-17 | 四川大学 | Pressure overall control system for calibration platform and control method thereof |
| CN112903470B (en) * | 2021-01-18 | 2022-03-25 | 东北大学 | High-temperature seepage coupling experimental device and method based on hard rock true triaxial system |
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