CN106226341A - A kind of temperature loading system simulating underground engineering ground temperature - Google Patents
A kind of temperature loading system simulating underground engineering ground temperature Download PDFInfo
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- CN106226341A CN106226341A CN201610505648.3A CN201610505648A CN106226341A CN 106226341 A CN106226341 A CN 106226341A CN 201610505648 A CN201610505648 A CN 201610505648A CN 106226341 A CN106226341 A CN 106226341A
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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
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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Abstract
The present invention provides a kind of temperature loading system simulating underground engineering ground temperature, carries out heating and realizing temperature field simulation for large scale rock sample physical model.Including thermocouple (1), temperature controller (2), A.C. contactor (3) and at least 4 heating rods (4).Thermocouple (1) and heating rod (4) are all imbedded in rock sample physical model.Heating rod (4) is arranged and is surrounded at least 1 circle square, and each foursquare centre of form central point all with rock sample physical model that encloses overlaps.Thermocouple (1) is embedded in heating rod (4) from inside to outside and arranges on the midpoint on the 1st circle square arbitrarily limit surrounded.The temperature of the rock sample physical model that temperature controller (2) is detected with thermocouple (1) by contrast predetermined temperature, control A.C. contactor (3) connect or trip, cause heating rod (4) to the heating of rock sample physical model or to stop heating.
Description
Technical field
The present invention relates to underground engineering rock temperature simulation field, be specifically related to a kind of temperature simulating underground engineering ground temperature
Loading system.
Background technology
21 century is the century that human development utilizes the underground space, fast-developing current of economic, science and technology, the mankind
The demand developing resource, vivosphere rapidly increases, in current world wide many built, building and will be newly-built
Underground engineering, is main underground passage including the subterranean tunnel of traffic engineering construction, exploitation of mineral resources and water conservancy and hydropower is opened
The underground chamber etc. sent out, the most gradually develops to the direction of great burying.As a example by mining activity, originally mining is all at hundreds of rice
Within the degree of depth, but in recent years, a large amount of mines 1000 meters of depth below that go underground are exploited, and some mines, South Africa are even entered
Enter the mining depth of 4000 meters.
Underground the most disturbed primitive rock temperature rises along with the increase of buried depth to have scholar's research to draw, geothermic gradient is with often
100 meters 3 degrees Celsius increases.When in underground, the thousands of meters of degree of depth are carried out the activity of the broken rock such as rock drilling, explosion, rock own temperature is far away
Higher than room temperature, its mechanical characteristic also has bigger difference with under room temperature state, there is many conventional rock mechanics unaccountable existing
As, such as: rock mass subregion on a large scale ruptures, rock burst abnormal, rock mass is crisp prolongs conversion etc..
Under great burying environment, because of the existence of high-ground stress, the various stressing conditions of underground engineering are sufficiently complex, add height
The impact of ground temperature factor, the control difficulty of country rock is increased during carrying out by underground engineering.Accordingly, it is considered to High-geotemperature environment is over the ground
The impact of lower engineering has very important significance.In order to study great burying under the coupling thermal and mechanical effect in temperature field and stress field
Problem caused by engineering activity, it is necessary to simulate the High-geotemperature field in buried underground environment, this be accomplished by inventing a set of can be to rock
Stone sample physical model carries out heating and obtains the loading system in uniform, stable temperature field, simulates the ground of reality the most truly
Temperature condition.
At present, mode of heating that study of rocks thermodynamic properties is used is many to be carried out for small size rock sample, as utilized
Small size rock sample is heated by baking oven, and for example carries out small-sized rock sample by oil temperature during high-temperature triaxial test
Heating.These can not simulate the mechanical property of construction of underground structure rock mass for the mode of heating of small size rock sample, and
Existing deep underground engineering physical simulation experiment is again almost without the impact considering ground temperature.Therefore, try for large scale rock
Sample physical model carries out the method and apparatus heating and realizing temperature field simulation, there is presently no correlational study.
Summary of the invention
Carry out heating and realizing temperature field simulation in view of not yet existing for large scale rock sample physical model at present
Method and apparatus, it is an object of the invention to provide a kind of temperature loading system simulating underground engineering ground temperature.
Technical problem solved by the invention can realize by the following technical solutions: a kind of simulation underground engineering ground temperature
Temperature loading system, including thermocouple, temperature controller, A.C. contactor and at least 4 heating rods, after heating rod parallel connection with
A.C. contactor is connected, and temperature controller connects with thermocouple, and A.C. contactor is in parallel with temperature controller, A.C. contactor with
Temperature controller each connects power supply, thermocouple and heating rod and all imbeds in rock sample physical model.
Currently preferred, said temperature controller is digital display adjusting apparatus.
By said temperature controller and above-mentioned A.C. contactor are connected, it is possible to make temperature controller according to presetting
Temperature value control A.C. contactor connect or tripping operation, it is achieved the regulation to rock sample physical model temperature field.
Currently preferred, above-mentioned heating rod is arranged and is surrounded at least 1 circle square, and the foursquare centre of form of each circle is tried with rock
The central point of sample physical model overlaps, and the foursquare length of side formula of each circle isUnit:
Rice, n represents that heating rod arranges the n-th circle square surrounded, a from inside to outsidenRepresent that n-th surrounded arranged by heating rod from inside to outside
Enclose the foursquare length of side.
Currently preferred, above-mentioned heating rod is equidistant placement in the foursquare each edge of same circle, is just being embedded in the n-th circle
The quantity of the heating rod on square position is according to formula Jn=(n+1) × 4-4 can be calculated, unit: root, and the n-th circle square is every
Heating rod quantity on bar limit is n+1 root, and n represents that heating rod arranges the n-th circle square surrounded, J from inside to outsidenRepresent by interior
The quantity of the heating rod being outwards embedded on the n-th circle square position.
Currently preferred, the power of above-mentioned heating rod is 400～1600w.
In the manner described above above-mentioned heating rod is arranged, it is possible to realize uniformly adding rock sample physical model
Heat.By above-mentioned heating rod and above-mentioned A.C. contactor are connected, it is possible to make A.C. contactor control the power supply of heating rod, make to add
Hot pin heating or stopping heating, thus realize the stability contorting to rock sample physical model temperature field.
Currently preferred, above-mentioned thermocouple temperature measurement scope is 0 DEG C～400 DEG C, and thermocouple is embedded in and heats from inside to outside
Rod is arranged on the midpoint on the 1st circle square arbitrarily limit surrounded.
Above-mentioned thermocouple is embedded in rock sample physical model, it is possible to the temperature of real-time detection rock sample physical model
Degree.By above-mentioned thermocouple is connected with said temperature controller, it is possible to make the temperature that temperature controller display thermocouple detects
Degree situation.Thermocouple is embedded in heating rod from inside to outside and arranges on the midpoint on the 1st circle square arbitrarily limit surrounded so that thermoelectricity
Occasionally can detect the temperature near the wall of tunnel excavation part hole, not affected by tunnel excavation.
There is the protective layer of 3 cm in view of the above-mentioned heating rod of outermost layer, thus above-mentioned one simulates underground engineering
It is a that the temperature loading system of ground temperature is applied to length of side an+ 0.03≤a ＜ an+1The rock sample physical model of+0.03, unit:
Rice, a represents the length of side of rock sample physical model, anRepresent that the n-th foursquare limit of circle surrounded arranged by heating rod from inside to outside
Long, an+1Represent that the (n+1)th foursquare length of side of circle surrounded arranged by heating rod from inside to outside.
A kind of temperature loading method simulating underground engineering ground temperature, including above-mentioned thermocouple, said temperature controller, above-mentioned
A.C. contactor and at least 4 above-mentioned heating rods, connect with A.C. contactor after heating rod parallel connection, temperature controller and thermocouple
Series connection, A.C. contactor is in parallel with temperature controller, and A.C. contactor and temperature controller each connect power supply, thermocouple with add
Hot pin is all imbedded in rock sample physical model, and temperature controller is detected by contrast predetermined temperature and thermocouple
The temperature of rock sample physical model, controls A.C. contactor and connects or tripping operation, cause heating rod to rock sample physical model
Heating or stopping heating.
Compared with prior art, the invention has the beneficial effects as follows: large scale subsurface rock sample physical model can be executed
Add uniformly, the temperature field of temperature-adjustable value, and temperature field can be controlled in real time make it keep stable；Owing to components and parts used are simple
It is easy to get, thus this system simple structure, easy to operate, cheap；The most also heating rod can be adjusted flexibly according to practical situation
Quantity, to adapt to the experimental study needs of different size rock sample physical model.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of temperature loading system simulating underground engineering ground temperature of the present invention.
Fig. 2 is heating rod and the thermocouple plane of a kind of temperature loading system simulating underground engineering ground temperature of the present invention
Layout drawing.
Detailed description of the invention
As it is shown in figure 1, the present invention includes thermocouple 1, temperature controller 2, A.C. contactor 3 and heating rod 4, heating rod 4
Connecting with A.C. contactor 3 after parallel connection, A.C. contactor 3 is in parallel with temperature controller 2, and temperature controller 2 is gone here and there with thermocouple 1
Connection, A.C. contactor 3 and temperature controller 2 each connect power supply, thermocouple 1 and heating rod 4 and all imbed rock sample physics mould
In type.
Wherein, temperature control system is made up of temperature controller 2, A.C. contactor 3 and heating rod 4, temperature monitoring system
It is made up of temperature controller 2 and thermocouple 1.
Embodiment 1
N=1 is substituted into formulaJn=(n+1) × 4-4 and rock sample physics
Side size range a of modeln+ 0.03≤a ＜ an+1+ 0.03 can obtain: heating rod is arranged and surrounded 1 circle square, this foursquare centre of form
Overlapping with the central point of rock sample physical model, this square length of side is 0.177 meter, buries 4 heating rods, this square altogether underground
Burying 2 heating rods in each edge underground, the present embodiment is applicable to the rock sample physics mould that side size range is 0.207～0.433 meter
Type.
Embodiment 2
As in figure 2 it is shown, n=2 is substituted into formulaJn=(n+1) × 4-4 and rock
Side size range a of stone sample physical modeln+ 0.03≤a ＜ an+1+ 0.03 can obtain: heating rod is arranged and surrounded 2 circle squares, all
2 enclose the foursquare centre of form central point all with rock sample physical model overlaps；The 1st circle square length of side is 0.177 meter, buries altogether
If 4 heating rods, this circle square each edge buries 2 heating rods underground；The 2nd circle square length of side is 0.403 meter, buries 8 altogether underground
Root heating rod, this circle square each edge buries 3 heating rods underground；The heating rod sum buried underground on all 2 circle squares is 12
Root, the present embodiment is applicable to the rock sample physical model that side size range is 0.433～0.659 meter.
Embodiment 3
N=5 is substituted into formulaJn=(n+1) × 4-4 and rock sample physics
Side size range a of modeln+ 0.03≤a ＜ an+1+ 0.03 can obtain: heating rod is arranged and surrounded 5 circle squares from inside to outside, and all 5
Enclose the foursquare centre of form central point all with rock sample physical model to overlap；The 1st circle square length of side is 0.177 meter, buries altogether
If 4 heating rods, this circle square each edge buries 2 heating rods underground；The 2nd circle square length of side is 0.403 meter, buries 8 altogether underground
Root heating rod, this circle square each edge buries 3 heating rods underground；The 3rd circle square length of side is 0.629 meter, buries 12 altogether underground
Heating rod, this circle square each edge buries 4 heating rods underground；The 4th circle square length of side is 0.856 meter, buries 16 altogether underground and adds
Hot pin, this circle square each edge buries 5 heating rods underground；The 5th circle square length of side is 1.082 meters, buries 20 heating altogether underground
Rod, this circle square each edge buries 6 heating rods underground；The heating rod sum buried underground on all 5 circle squares is 60, this reality
Execute example and be applicable to the rock sample physical model that side size range is 1.112～1.338 meters.
Native system is not limited to above-described embodiment, the part data that list as shown in the table:
Table 1 heating rod buries parameter and rock sample physical model size range tables of data underground
The rock burst physical modeling being applied under the coupling thermal and mechanical effect of temperature field and stress field due to native system, test weight
Point pays close attention to the temperature field of (i.e. rock burst scope) near tunneling hole wall, thus thermocouple 1 is embedded in that heating rod 4 surrounds the
On the midpoint on 1 circle square arbitrarily limit, thermocouple 1 so can be made to detect the temperature of (i.e. rock burst scope) near Tunnel wall,
Do not affected by tunnel excavation.
All heating rods 4 are parallel on a power line, then connect with A.C. contactor 3, and the work of heating rod 4 is by exchanging
Catalyst 3 controls；A.C. contactor 3 and temperature controller 2 are in parallel, and temperature controller 2 controls A.C. contactor 3 and connects or jump
Lock；Thermocouple 1 and temperature controller 2 are connected, and temperature controller 2 is detected within rock sample physical model by thermocouple 1
Temperature value；A.C. contactor 3 and temperature controller 2 each connect power supply.
Specific works process is:
First arranging the control temperature on temperature controller 2, the temperature value detected when thermocouple 1 reaches temperature controller
During the control temperature value that 2 preset, temperature controller 2 forces A.C. contactor 3 to trip, and heating rod 4 quits work because of power-off, no
Again rock sample physical model is heated；When the temperature of rock sample physical model declines, the temperature that thermocouple 1 detects
During the control temperature value that value is preset less than temperature controller 2, control A.C. contactor 3 is turned on by temperature controller 2, thus
Heating rod 4 starts again to heat rock sample physical model.Two above controls process and is repeated, and therefore can guarantee that rock
Temperature value within stone sample physical model is stable in the control temperature pre-set.
Above-described embodiment is presently preferred embodiments of the present invention, is not the restriction to technical solution of the present invention, is not taking off
On the premise of spirit and scope of the invention, the present invention also has various changes and modifications, and these changes and improvements are regarded as
Fall in scope of the claimed invention.
Claims (7)
1. the temperature loading system simulating underground engineering ground temperature, it is characterised in that: include thermocouple (1), temperature controller
(2), A.C. contactor (3) and at least 4 heating rods (4), connect with A.C. contactor (3) after heating rod (4) parallel connection, temperature control
Instrument processed (2) is connected with thermocouple (1), and A.C. contactor (3) is in parallel with temperature controller (2), A.C. contactor (3) and temperature control
Instrument processed (2) each connects power supply, thermocouple (1) and heating rod (4) and all imbeds in rock sample physical model.
A kind of temperature loading system simulating underground engineering ground temperature the most according to claim 1, it is characterised in that: described temperature
Degree controller (2) is digital display adjusting apparatus.
A kind of temperature loading system simulating underground engineering ground temperature the most according to claim 1, it is characterised in that add described in:
Hot pin (4) is arranged and is surrounded at least 1 circle square, and the foursquare centre of form of each circle overlaps with the central point of rock sample physical model,
The foursquare length of side formula of each circle isUnit: rice, n represents heating rod (4) from inside to outside
Arrange the n-th circle square surrounded, anRepresent that the n-th foursquare length of side of circle surrounded arranged by heating rod (4) from inside to outside.
A kind of temperature loading system simulating underground engineering ground temperature the most according to claim 3, it is characterised in that add described in:
Hot pin (4) is equidistant placement in the foursquare each edge of same circle, the heating rod (4) being embedded on the n-th circle square position
Quantity is according to formula Jn=(n+1) × 4-4 can be calculated, unit: root, heating rod (4) quantity in the n-th circle square each edge
For n+1 root, n represents that heating rod (4) arranges the n-th circle square surrounded, J from inside to outsidenRepresent and be embedded in the n-th circle from inside to outside
The quantity of the heating rod (4) on square position.
A kind of temperature loading system simulating underground engineering ground temperature the most according to claim 4, it is characterised in that add described in:
The power of hot pin (4) is 400～1600w.
A kind of temperature loading system simulating underground engineering ground temperature the most according to claim 1, it is characterised in that: described heat
Galvanic couple (1) temperature-measuring range is 0 DEG C～400 DEG C, and thermocouple (1) is embedded in heating rod (4) from inside to outside and is just arranging the 1st circle surrounded
On the midpoint on square any limit.
7. the temperature loading method simulating underground engineering ground temperature, it is characterised in that: will according to the mode described in claim 1
Thermocouple (1), temperature controller (2), A.C. contactor (3) and heating rod (4) are attached, thermocouple (1) and heating rod (4)
All in embedment rock sample physical model, temperature controller (2) is detected with thermocouple (1) by contrast predetermined temperature
The temperature of rock sample physical model, control A.C. contactor (3) and connect or trip, cause heating rod (4) to rock sample
Physical model heating or stopping heating.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107505353A (en) * | 2017-09-27 | 2017-12-22 | 江苏建筑职业技术学院 | A kind of cold area's short tunnel inlet cooling rating model and its method of testing |
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| US6071008A (en) * | 1997-01-28 | 2000-06-06 | Nagoya University | Method of measuring heat capacity of sample |
| CN2466645Y (en) * | 2001-02-09 | 2001-12-19 | 大庆油田有限责任公司 | Soil thermophysical nature measurer |
| CN101545879A (en) * | 2009-05-07 | 2009-09-30 | 天津大学 | Cable expansion factor determination instrument |
| CN202564502U (en) * | 2012-03-26 | 2012-11-28 | 安徽理士电源技术有限公司 | Heating control circuit, electric heating equipment and temperature control system |
| CN102852517A (en) * | 2012-09-07 | 2013-01-02 | 中国石油天然气集团公司 | Physical simulation method and device for formation temperature and pressure one-dimensional distribution |
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2016
- 2016-06-30 CN CN201610505648.3A patent/CN106226341B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6071008A (en) * | 1997-01-28 | 2000-06-06 | Nagoya University | Method of measuring heat capacity of sample |
| CN2466645Y (en) * | 2001-02-09 | 2001-12-19 | 大庆油田有限责任公司 | Soil thermophysical nature measurer |
| CN101545879A (en) * | 2009-05-07 | 2009-09-30 | 天津大学 | Cable expansion factor determination instrument |
| CN202564502U (en) * | 2012-03-26 | 2012-11-28 | 安徽理士电源技术有限公司 | Heating control circuit, electric heating equipment and temperature control system |
| CN102852517A (en) * | 2012-09-07 | 2013-01-02 | 中国石油天然气集团公司 | Physical simulation method and device for formation temperature and pressure one-dimensional distribution |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107505353A (en) * | 2017-09-27 | 2017-12-22 | 江苏建筑职业技术学院 | A kind of cold area's short tunnel inlet cooling rating model and its method of testing |
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