CN108444636A - A kind of soil air pressure monitoring device and its monitoring method - Google Patents
A kind of soil air pressure monitoring device and its monitoring method Download PDFInfo
- Publication number
- CN108444636A CN108444636A CN201810617413.2A CN201810617413A CN108444636A CN 108444636 A CN108444636 A CN 108444636A CN 201810617413 A CN201810617413 A CN 201810617413A CN 108444636 A CN108444636 A CN 108444636A
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- China
- Prior art keywords
- air pressure
- soil
- pressure
- soil air
- test tube
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
- G01L7/18—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements using liquid as the pressure-sensitive medium, e.g. liquid-column gauges
Abstract
The invention discloses a kind of soil air pressure monitoring device and its monitoring methods,Including air pressure monitoring device ontology,Water-level control apparatus,Soil air acquires and pressure apparatus,Air pressure monitoring device ontology monitors sensing element by soil air pressure,Soil air acquires and pressure equaliser,Air pressure compensation meter composition,Pressure transmission pipe,Observe panel,By soil air pressure test tube,Atmospheric pressure test tube,Calibration gauge,Water-level control apparatus,These parts of atmospheric pressure meter form,Soil air acquisition and pressure equaliser on air pressure monitoring device ontology are connected to soil air,Water-level control apparatus and local atmosphere,Soil air pressure test tube is soil air pressure test tube,When there are when draught head with atmospheric pressure for soil air pressure,The observation liquid of soil air pressure test tube both sides can be driven to move up and down,It is poor by observing liquid level in soil air pressure test tube,Calculate the draught head of soil air pressure and air,And then calculate soil air pressure.
Description
Technical field
The present invention relates to soil air pressure monitoring technical field, specially a kind of soil air pressure monitoring device and its
Monitoring method.
Background technology
Infiltration process of the water in aeration zone is substantially displacement process of the water and air in porous media.Traditional packet gas
Band Water Transport thinks that air flow property is far longer than the mobility of water, and air can be freely accessible to and be discharged, therefore ignore packet
Air pressure change in gas band.In fact, in the mutual displacement process of water and air, the flowing of air can enter infiltration rate to water
Resistance or retardation are infiltrated in rate generation.Unsaturation band water-loading coupled action research key problem is moisture and gas in aeration zone
Move influence each other effect and mechanism problem.
Unsaturation at present has ripe monitoring device, existing protrusion with moisture (soil moisture content, soil water potential, temperature etc.)
Problem is that gaseous phase of soil (soil air pressure) changes no corresponding monitoring device, seriously hampers water-loading coupled action research
Work.
Invention content
The purpose of the present invention is to provide a kind of high certainty of measurement, while can also accurately calculate soil air by formula
A kind of soil air pressure monitoring device and its monitoring method of pressure size, to solve mentioned above in the background art ask
Topic.
To achieve the above object, the present invention provides the following technical solutions：A kind of soil air pressure monitoring device, including soil
Earth air pressure monitoring device ontology, the soil air pressure monitoring device ontology are equipped with testing tube installation casing, test
The top of pipe installation casing is equipped with observation panel, and the rear of the testing tube installation casing is equipped with water-level control apparatus, the survey
The left side side-wall outer side of test tube installation casing is equipped with atmospheric pressure meter, and the outside of the atmospheric pressure meter is equipped with calibration gauge, described
The left side bottom end of testing tube installation casing is equipped with pressure transmission pipe, one end of pressure transmission pipe and the rear bottom of testing tube installs case
The other end of end connection, pressure transmission pipe is equipped with soil air acquisition pressure equaliser, observation panel connection, and the soil is empty
The linkage section that gas acquires pressure equaliser is equipped with sealing-plug, and the bottom of the observation panel is equipped with base support, the observation
Panel passes through inspection surface equipped with soil air pressure test tube, atmospheric pressure test tube, calibration gauge, the soil air pressure test tube
It is connect with pressure transmission pipe at the top of plate, soil air pressure test tube is connect by inspection surface board bottom portion with water-level control apparatus.
Preferably, the water-level control apparatus is equipped with water level control box, and the upper right side of the water level control box is equipped with water
Level control pipe, the water level control pipe are equipped with haemostatic clamp with controller junction, and the controller is internally provided with foot pedal vacuum
The top of pump, big model syringe, the water level control box is equipped with air connecting hole close to one side edge, and air connects bore dia
For diameter 5cm, water level control box is connected to respectively at atmospheric pressure test tube, soil air pressure test tube.
Preferably, the soil air acquisition pressure equaliser is equipped with balancing gate pit, and one end of the balancing gate pit is equipped with
The side of pot clay end, the balancing gate pit is equipped with air pressure compensation meter, and the air pressure compensation meter is equipped with balancing gate pit, pressure
One end of room is equipped with porous plastics head, and Liang Ge is connected between balancing gate pit, the soil air acquisition pressure equaliser and air
Pressure compensation meter is placed in 30-45 ° of angle in soil, and the soil air acquisition pressure equaliser connects with pressure transmission pipe
It connects.
Preferably, the inside both sides side wall of the testing tube installation casing is equipped with atmospheric pressure test tube, the atmospheric pressure
The side of test tube is equipped with calibration gauge, and soil air pressure test tube, the soil air pressure are equipped between the atmospheric pressure test tube
Calibration gauge is equipped with after power test tube.
Preferably, the atmospheric pressure test tube and soil air pressure test tube are internally provided with ink.
Preferably, the bottom of the observation panel is equipped with base support.
Preferably, the calculation formula that the air pressure monitoring device ontology detects soil air pressure is：
P soil=P air+Δ Z liquid levels * 9.8
In formula：P soil indicates soil air pressure, unit：Pascal；P air indicates local atmospheric pressure, unit：Paasche
Card；Δ Z liquid levels indicate that liquid level is poor.
Preferably, a kind of soil air pressure monitoring device, monitoring method include the following steps：
A, soil air is acquired into pressure apparatus first and pressure equaliser is placed in soil；
B, water-level control apparatus water filling is given, its water level is rationally controlled；
C, the air in soil is another into soil air acquisition and the balancing gate pit of pressure apparatus, balancing gate pit by pot clay end
One end is connected to pressure transmission pipe-soil air pressure test tube-water-level control apparatus, soil air pressure and atmospheric pressure in balancing gate pit
Power reaches pressure balance；
D, when occurring pressure increase in balancing gate pit, observation liquid generation liquid level in soil air pressure test tube both ends is poor, measures
The size of liquid level difference, then obtains soil air pressure by calculation formula.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) soil air pressure monitoring device is designed, different depth soil air pressure can be monitored, is water-air two phase flows
Research provides monitoring data；
(2) it uses ink as observation liquid, substantially increases pressure monitoring precision, the density ratio of mercury and ink is 13.6
: 1, the accuracy of reading of ink improves 13.6 times after replacement, and precision is increased to 98 pas by 1332.8 pas；
(3) height for increasing water-level control apparatus by controlling high-low water level, and then increases soil air pressure monitoring dress
The range set；
(4) pot clay end is the sensing element of soil air pressure monitoring device, by the clay material with fine uniform structure hole
Material is made, and the soil air acquisition and pressure equaliser that pot clay end makes can prevent moisture or foreign matter from entering, when reaching long
Between the purpose that monitors.
Description of the drawings
Fig. 1 is air pressure monitoring device body construction schematic diagram of the present invention；
Fig. 2 is air pressure monitoring device ontology side schematic view of the present invention；
Fig. 3 is soil air of the present invention acquisition and pressure apparatus structural schematic diagram；
Fig. 4 is water-level control apparatus schematic diagram of the present invention.
In figure：1, soil air pressure monitoring device ontology；2, water-level control apparatus；3, panel is observed；4, atmospheric pressure
Test tube；5, atmospheric pressure meter；6, pressure transmission pipe；7, soil air acquisition and pressure equaliser；8, calibration gauge；9, bottom branch
Frame；10, balancing gate pit；11, pot clay end；12, air pressure compensation meter；13, porous plastics head；14, air connecting hole；15, water level
Control cabinet；16, water level control pipe；17, haemostatic clamp；18, controller；19, foot pedal vacuum pumps；20, big model syringe；21, native
Earth air pressure test tube；22, testing tube installation casing.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It please refers to Fig.1 or Fig. 2, the present invention provides a kind of technical solution：A kind of soil air pressure monitoring device, including sky
Atmospheric pressure monitoring device ontology 1, water-level control apparatus 2, soil air acquisition and pressure apparatus 7, air pressure monitoring device sheet
Body 1 is equipped with testing tube installation casing 22, and testing tube installation casing 22 is internally provided with atmospheric pressure test tube 4, and atmospheric pressure is surveyed
Pipe 4 is internally provided with ink, and observation liquid is changed to ink by mercury, substantially increases pressure monitoring precision, mercury and ink it is close
Degree is than being 13.6: 1, and the accuracy of reading of ink improves 13.6 times after replacement, and precision is increased to 98 pas by 1332.8 pas, atmospheric pressure
The side of test tube 4 is equipped with calibration gauge 8, and the bottom of testing tube installation casing 9 is equipped with soil air pressure test tube 21.
The top of testing tube installation casing 22 is equipped with observation panel 3, and the bottom of observation panel 3 is equipped with base support 9, pedestal
Holder 9 is used as supplementary observation tool, and atmospheric pressure test tube 4, soil air pressure test tube 21, calibration gauge are placed on base support 9
8, keep horizontal by 9 whole device of base support.
Referring to Fig. 4, being equipped with water-level control apparatus 2 at the rear of testing tube installation casing 22, set on water-level control apparatus 2
There are water level control box 15, the upper right side of water level control box 15 to be equipped with water level control pipe 16, water level control pipe 16 connects with controller 18
It meets place and is equipped with haemostatic clamp 17, the bottom end of water level control pipe 16 is equipped with controller 18, and controller 18 is internally provided with foot pedal vacuum pump
19, the top of big model syringe 20, water level control box 15 is equipped with air connecting hole 14, air connecting hole 14 close to one side edge
A diameter of diameter 5cm.
Referring to Fig. 3, the left side side wall of testing tube installation casing 22 is equipped with atmospheric pressure meter 5, atmospheric pressure meter 5 it is outer
Portion is equipped with scale plate 8, and scale plate 8 is 1m ranges, and pressure transmission pipe 6, pressure are equipped in the left side bottom end of testing tube installation casing 22
One end of power conducting tube 6 is connect with the left side bottom end of testing tube installs case 22, and 6 other ends of pressure transmission pipe are equipped with soil air
Acquire pressure apparatus 7, observation panel 3 connect, soil air acquire pressure apparatus 7 be equipped with balancing gate pit 10, the one of balancing gate pit 10
End is equipped with pot clay end 11, and pot clay end 11 is the sensing element of soil air pressure monitoring device ontology 1, by with fine uniform structure hole
The china clay material of gap is made, clay, 11 make soil airs acquisition and pressure equaliser can prevent moisture or foreign matter into
Enter, achievees the purpose that monitor for a long time, there are when air pressure difference between pot clay end 11 is inside and outside, air will move,
Until internal and external equilibrium, the air pressure measured at this time by local atmospheric pressure, observation liquid is soil air pressure, works as soil
When earth moisture is close to saturation, moisture passes through pot clay end, and into inside device, water membrane is formed in pot clay end tube wall.
The side of balancing gate pit 10 is equipped with air pressure compensation meter 12, and air pressure compensation meter 12 is equipped with balancing gate pit 10, pressure
One end of power room 10 is equipped with porous plastics head 13, and 10 material of balancing gate pit passes through soil air between the balancing gate pits pvc Guan Liangge 10
Pressure test tube connects, and soil air acquisition pressure apparatus 7 is placed in 30-45 ° of angle in soil, after moisture content declines, pressure
10 residual moisture of power room can enter soil quickly through pot clay end 11.
After forming water membrane in 11 tube wall of pot clay end, when soil air pressure reaches air-entry value, moisture film disappears, air
It can just enter inside device, reach balance with soil air pressure gradually, this period, the air in soil are formed in moisture film
Pressure monitoring will appear lag, and soil air pressure at this time can carry out atmospheric pressure compensating by empty atmospheric pressure compensating meter 12 to device inside,
Phenomenon after eliminating moisture film in clay tube wall and the Pressure monitoring that generates, air pressure compensation, 12 front ends are porous plastics, gap
It is big compared with pot clay end, it is placed in soil with 30-45 ° of angle, exchange rate between soil air and balancing gate pit can be accelerated, eliminated
The air pressure hysteresis of monitoring.
The calculation formula that air pressure monitoring device sheet 1 detects soil air pressure is：
P soil=P air+Δ Z liquid levels * 9.8
In formula：P soil indicates soil air pressure, unit：Pascal；P air indicates local atmospheric pressure, unit：Paasche
Card；Δ Z liquid levels indicate that liquid level is poor.
Soil air is acquired into pressure apparatus 7 first and pressure equaliser is placed in soil, gives 2 note of water-level control apparatus
Water rationally controls its water level, and air in the soil is by pot clay end 11, into soil air acquisition and the pressure of pressure apparatus 7
Power room, 10 other end of balancing gate pit are connected to pressure transmission pipe 6- soil air pressure test tube 21- water-level control apparatus 2, balancing gate pit 10
Middle soil air pressure reaches pressure balance with atmospheric pressure, and when occurring pressure increase in balancing gate pit 10, soil air pressure is surveyed
Observation liquid generation liquid level in pipe both ends is poor, measures the size of liquid level difference, then obtains soil air pressure by calculation formula, empty
Atmospheric pressure monitoring device ontology 1 can monitor different depth soil air pressure, and monitoring data are provided for water-air two phase flows research.
A kind of soil air pressure monitoring device, monitoring method include the following steps：
A, soil air is acquired into pressure apparatus 7 first and pressure equaliser is placed in soil；
B, 2 water filling of water-level control apparatus is given, its water level is rationally controlled；
C, the air in soil is by pot clay end 11, into soil air acquisition and the balancing gate pit of pressure apparatus 7, balancing gate pit
10 other ends are connected to pressure transmission pipe 6- soil air pressure test tube 21- water-level control apparatus 2, soil air pressure in balancing gate pit 10
Power reaches pressure balance with atmospheric pressure；
D, when occurring pressure increase in balancing gate pit 10, observation liquid generation liquid level in soil air pressure test tube both ends is poor, measures
The size for going out liquid level difference, then obtains soil air pressure by calculation formula.
The beneficial effects of the invention are as follows：
(1) soil air pressure monitoring device is designed, different depth soil air pressure can be monitored, is water-air two phase flows
Research provides monitoring data；
(2) it uses ink as observation liquid, substantially increases pressure monitoring precision, the density ratio of mercury and ink is 13.6
: 1, the accuracy of reading of ink improves 13.6 times after replacement, and precision is increased to 98 pas by 1332.8 pas；
(3) height for increasing water-level control apparatus by controlling high-low water level, and then increases soil air pressure monitoring dress
The range set；
(4) pot clay end is the sensing element of soil air pressure monitoring device, by the clay material with fine uniform structure hole
Material is made.The soil air acquisition and pressure equaliser that pot clay end makes can prevent moisture or foreign matter from entering, when reaching long
Between the purpose that monitors.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (9)
1. a kind of soil air pressure monitoring device, including soil air pressure monitoring device ontology (1), it is characterised in that：Institute
It states soil air pressure monitoring device ontology (1) and is equipped with testing tube installation casing (22), the top of testing tube installation casing (22)
Portion is equipped with observation panel (3), and the rear of the testing tube installation casing (22) is equipped with water-level control apparatus (2), the testing tube
The left side side-wall outer side of installation casing (22) is equipped with atmospheric pressure meter (5), and the outside of the atmospheric pressure meter (5) is equipped with calibration gauge
(8), the left side bottom end of the testing tube installation casing (22) is equipped with pressure transmission pipe (6), one end of pressure transmission pipe (6) and survey
The rear bottom end of test tube installs case (22) connects, and (6) other end of pressure transmission pipe is equipped with soil air acquisition pressure balance dress
(7), observation panel (3) connection are set, the linkage section of the soil air acquisition pressure equaliser (7) is equipped with sealing-plug, described
The bottom for observing panel (3) is equipped with base support (9), and the observation panel (3) is equipped with soil air pressure test tube (21), greatly
Atmospheric pressure test tube (4), calibration gauge (8), the soil air pressure test tube (21) is by observing panel top and pressure transmission pipe
(6) it connects, soil air pressure test tube (21) is connect by inspection surface board bottom portion with water-level control apparatus (2).
2. a kind of soil air pressure monitoring device according to claim 1, it is characterised in that：The water-level control apparatus
(2) it is equipped with water level control box (15), the upper right side of the water level control box (15) is equipped with water level control pipe (16), the water level
Control pipe (16) is equipped with haemostatic clamp (17) with controller (18) junction, and the controller (18) is internally provided with foot pedal vacuum pump
(19), the top of big model syringe (20), the water level control box (15) is equipped with air connecting hole (14) close to one side edge,
The a diameter of diameter 5cm of air connecting hole (14), water level control box (15) is respectively at atmospheric pressure test tube (4), soil air pressure
Test tube (9) is connected to.
3. a kind of soil air pressure monitoring device according to claim 1, it is characterised in that：The soil air acquisition
Pressure equaliser (7) is equipped with balancing gate pit (10), and one end of the balancing gate pit (10) is equipped with pot clay end (11), the balancing gate pit
(10) side is equipped with air pressure compensation meter (12), and the air pressure compensation meter (12) is equipped with balancing gate pit (10), pressure
One end of room (10) is equipped with porous plastics head (13), and the balancing gate pits Liang Ge are connected between (10), and the soil air acquisition pressure is flat
Weighing apparatus device (7) is placed in 30-45 ° of angle in soil with air pressure compensation meter (12), and the soil air acquisition pressure is flat
Weighing apparatus device (7) is connect with pressure transmission pipe (6).
4. a kind of soil air pressure monitoring device according to claim 1, it is characterised in that：The testing tube installs case
The inside both sides side wall of body (22) is equipped with atmospheric pressure test tube (4), and the side of the atmospheric pressure test tube (4) is equipped with calibration gauge
(8), soil air pressure test tube (21), the soil air pressure test tube (21) are equipped between the atmospheric pressure test tube (4)
It is equipped with calibration gauge (8) afterwards.
5. a kind of soil air pressure monitoring device according to claim 4, it is characterised in that：The atmospheric pressure test tube
(4) it is internally provided with ink with soil air pressure test tube (21).
6. a kind of soil air pressure monitoring device according to claim 4, it is characterised in that：The atmospheric pressure test tube
(4) be internally provided with ink.
7. a kind of soil air pressure monitoring device according to claim 1, it is characterised in that：The observation panel (3)
Bottom be equipped with base support.
8. a kind of soil air pressure monitoring device according to claim 1, it is characterised in that：The air pressure monitoring
The calculation formula that device sheet (1) detects soil air pressure is：
P soil=P air+Δ Z liquid levels * 9.8
In formula：P soil indicates soil air pressure, unit：Pascal；P air indicates local atmospheric pressure, unit：Pascal；Δ
Z liquid levels indicate that liquid level is poor.
9. realizing a kind of soil air pressure monitoring device described in claim 1, monitoring method includes the following steps：
A, soil air acquisition pressure apparatus (7) and pressure equaliser are placed in soil first；
B, water-level control apparatus (2) water filling is given, its water level is rationally controlled；
C, the air in soil is by pot clay end (11), into soil air acquisition and the balancing gate pit of pressure apparatus (7), balancing gate pit
(10) other end is connected to pressure transmission pipe (6)-soil air pressure test tube (21)-water-level control apparatus (2), in balancing gate pit (10)
Soil air pressure reaches pressure balance with atmospheric pressure；
D, when occurring pressure increase in balancing gate pit (10), observation liquid generation liquid level in soil air pressure test tube both ends is poor, measures
The size of liquid level difference, then obtains soil air pressure by calculation formula.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810617413.2A CN108444636A (en) | 2018-06-15 | 2018-06-15 | A kind of soil air pressure monitoring device and its monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810617413.2A CN108444636A (en) | 2018-06-15 | 2018-06-15 | A kind of soil air pressure monitoring device and its monitoring method |
Publications (1)
| Publication Number | Publication Date |
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| CN108444636A true CN108444636A (en) | 2018-08-24 |
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ID=63207087
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810617413.2A Pending CN108444636A (en) | 2018-06-15 | 2018-06-15 | A kind of soil air pressure monitoring device and its monitoring method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252797A (en) * | 2011-05-06 | 2011-11-23 | 西华大学 | U-shaped pipe pressure meter and pressure measurement method thereof |
| CN102564676A (en) * | 2012-02-12 | 2012-07-11 | 吉林大学 | Penetrating-stretching type pore water pressure measurement device and measurement method thereof |
| CN104020096A (en) * | 2014-06-20 | 2014-09-03 | 青岛理工大学 | Device and method for detecting pore pressure by U-shaped pipe hydraulic difference method |
| CN107219346A (en) * | 2017-06-21 | 2017-09-29 | 中国科学院南京土壤研究所 | New soil tensometer and soil water potential measuring method |
-
2018
- 2018-06-15 CN CN201810617413.2A patent/CN108444636A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252797A (en) * | 2011-05-06 | 2011-11-23 | 西华大学 | U-shaped pipe pressure meter and pressure measurement method thereof |
| CN102564676A (en) * | 2012-02-12 | 2012-07-11 | 吉林大学 | Penetrating-stretching type pore water pressure measurement device and measurement method thereof |
| CN104020096A (en) * | 2014-06-20 | 2014-09-03 | 青岛理工大学 | Device and method for detecting pore pressure by U-shaped pipe hydraulic difference method |
| CN107219346A (en) * | 2017-06-21 | 2017-09-29 | 中国科学院南京土壤研究所 | New soil tensometer and soil water potential measuring method |
Non-Patent Citations (1)
| Title |
|---|
| 刘习银: "基于非饱和渗流理论的膨胀土渠坡渗流控制措施研究", 《中国优秀说是学问论文全文数据库-工程科技Ⅱ辑》, no. 3, pages 037 - 129 * |
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