CN106525695B - Soil capillary porosity measuring device and measuring method thereof - Google Patents
Soil capillary porosity measuring device and measuring method thereof Download PDFInfo
- Publication number
- CN106525695B CN106525695B CN201710019519.8A CN201710019519A CN106525695B CN 106525695 B CN106525695 B CN 106525695B CN 201710019519 A CN201710019519 A CN 201710019519A CN 106525695 B CN106525695 B CN 106525695B
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- soil
- beaker
- boss
- filter paper
- ring cutter
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- 239000002689 soil Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000005520 cutting process Methods 0.000 claims abstract description 16
- 239000005337 ground glass Substances 0.000 claims abstract description 6
- 239000013013 elastic material Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 238000005303 weighing Methods 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 239000004927 clay Substances 0.000 claims description 3
- 238000003892 spreading Methods 0.000 claims description 3
- 239000005338 frosted glass Substances 0.000 claims 1
- 238000001035 drying Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
- G01N15/0893—Investigating volume, surface area, size or distribution of pores; Porosimetry by measuring weight or volume of sorbed fluid, e.g. B.E.T. method
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a soil capillary porosity measuring device and a measuring method thereof, wherein the measuring device comprises a beaker, a cutting ring and a fixing frame, the lower end of the cutting ring is sleeved on a boss at the bottom in the beaker, the fixing frame is arranged at the upper section of the lower end of the cutting ring, the fixing frame is of a circular ring structure, the outer cylindrical surface of the fixing frame is clung to the bottom of the beaker, a fixing net made of elastic materials is arranged on the upper end surface of the fixing frame, the fixing net is sleeved on the cutting ring, coarse filter paper is arranged at the bottom of the beaker, the whole bottom of the beaker is covered by the coarse filter paper, and a ground glass sheet is covered at the top of the beaker.
Description
Technical Field
The invention relates to a soil capillary porosity measuring device and a measuring method thereof, belonging to the technical field of soil test devices.
Background
The existing soil capillary porosity measurement adopts a white porcelain tray or an enamel tray to load water, a filter paper or a clean towel is paved at the bottom end of a volume weight soil sampler or a cutting ring, and a diffusion tray or a white porcelain plate below the filter paper.
Disclosure of Invention
The invention aims to solve the technical problems that: a soil capillary porosity measuring device and a measuring method thereof are provided to solve the problems in the prior art.
The technical scheme adopted by the invention is as follows: the utility model provides a soil capillary porosity measuring device, includes beaker, cutting ring and mount, and the cutting ring lower extreme cup joints on the boss of beaker inner bottom, and the bottom is provided with the mount by one section on, and the mount is the ring form structure, and its outer cylinder is hugged closely in the beaker bottom, and its up end is provided with the fixed network of elastic material preparation, and the fixed network cup joints on the cutting ring, and the beaker bottom is provided with coarse filter paper, and coarse filter paper covers the whole bottom of beaker, and the beaker top lid has the glass flake that rubs.
Preferably, the diameter of the boss is 0.5-1cm larger than the diameter of the cutting ring.
Preferably, the fixing net is provided with two layers.
Preferably, the method for measuring the porosity of the soil capillary comprises the following steps:
(1) Spreading the rough filter paper at the bottom of the inner side of the beaker and covering the boss, then adding quantitative water into the beaker, wherein the water surface is lower than the boss, and the part of the rough filter paper which is added on the boss contacts the water surface;
(2) Then the collected ring cutter sample passes through a double-layer fixed net on a fixed frame, the lower end of the ring cutter sample is arranged on a boss paved with rough filter paper, the soil in the ring cutter sample can be ensured to be contacted with the rough filter paper, and a ground glass sheet is covered;
(3) Recording test time, wherein the adopted soil is sandy soil for 4-6 hours, and the clay soil for 8-12 hours;
(4) Immediately after reaching the set time, the weight was recorded as W 1 After weighing, placing the ring cutter sample on the boss to continue water absorption, and after the weighing time is reached, carrying out next weighing and recording as W 2 Until the absolute value of the weight difference measured in two adjacent times is less than 0.2, the last weight W is used n Water and soil sample weight absorbed by the soil;
(5) And (3) calculating the porosity of the soil capillary:
in the method, in the process of the invention,is the weight of natural soil after water absorption, +.>For drying earth weight, the herb is added with>Is the volume of the ring cutter.
The invention has the beneficial effects that: compared with the prior art, the invention has the following effects:
1) The glass beaker with the special boss is fixed in volume, occupies a small area, is convenient to store and clean, and can greatly improve the experimental efficiency;
2) Quantitative water can be added according to the volume of the beaker and the height of the boss, and the water consumption is less than that of the existing device;
3) The area of the filter paper can be determined according to the diameter of the boss, so that the use amount of the filter paper is reduced;
4) The fixing frame can well ensure that the cutting ring cannot be inclined, ensure the normal running of the test and prevent the cutting ring from being knocked down in the placing process;
5) The top end of the ring cutter is parallel to the mouth of the beakers without the mouth, and the ground glass sheet is covered, so that the tightness of the space can be enhanced, and the influence of external conditions can be reduced;
6) The invention avoids the calculation of the hygroscopic water and membranous water in the prior art, and has more accurate test data and more reliable data.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic top view of the fixing net of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific examples.
Example 1: as shown in fig. 1-2, the soil capillary porosity measuring device comprises a beaker 1, a cutting ring 2 and a fixing frame 3, wherein the lower end of the cutting ring 2 is sleeved on a boss 4 at the bottom in the beaker 2, the fixing frame 3 is arranged at the upper part of the bottom, the fixing frame 3 is of a circular ring structure, the outer cylindrical surface of the fixing frame is clung to the bottom of the beaker 1, a fixing net 5 made of elastic materials is arranged on the upper end surface of the fixing frame, the fixing net 5 is sleeved on the cutting ring 2, coarse filter paper 6 is arranged at the bottom of the beaker 1, the coarse filter paper 6 covers the whole bottom of the beaker 1, and a ground glass sheet 7 is covered at the top of the beaker 1.
Preferably, the diameter of the boss 4 is 0.5-1cm larger than the diameter of the cutting ring.
Preferably, the fixing net 5 is provided with two layers, so that the ring cutter can be ensured to be placed more stably, and the test is more accurate.
The height of the boss is 1-2cm, the height of the ring cutter is plus the height of the boss=the height of the beaker (6.5-7 cm), and the top end of the ring cutter is parallel to the mouth of the beaker without a mouth;
the diameter of the beaker can be customized according to the experiment requirement, and the corresponding fixing frame can also be customized;
the fixing frame is tightly attached to the inner side wall of the beaker without a mouth, and the rubber layer 8 is attached to the periphery of the fixing frame, so that abrasion between the fixing frame and the wall of the beaker is reduced;
the diameter of the boss is 0.5 cm to 1cm larger than that of the annular cutter, and the diameter of the circular rough filter paper is larger than that of the boss and smaller than that of the beaker.
Example 2: a method for determining a soil capillary porosity determination device, the method comprising the steps of:
(1) Spreading the rough filter paper at the bottom of the inner side of the beaker and covering the boss, then adding quantitative water into the beaker, wherein the water surface is lower than the boss, and the part of the rough filter paper which is added on the boss contacts the water surface;
(2) Then the collected ring cutter sample passes through a double-layer fixed net on a fixed frame, the lower end of the ring cutter sample is arranged on a boss paved with rough filter paper, the soil in the ring cutter sample can be ensured to be contacted with the rough filter paper, and a ground glass sheet is covered;
(3) Recording test time, wherein the adopted soil is sandy soil for 4-6 hours, and the clay soil for 8-12 hours;
(4) Immediately after reaching the set time, the weight was recorded as W 1 After weighing, placing the ring cutter sample on the boss to continue water absorption, and after the weighing time is reached, carrying out next weighing and recording as W 2 Until the absolute value of the weight difference measured in two adjacent times is less than 0.2, the last weight W is used n Water and soil sample weight absorbed by the soil;
(5) And (3) calculating the porosity of the soil capillary: because the specific gravity of the water is approximately 1, the weight of the capillary water in the soil body is just equivalent to the volume of capillary pores, and the capillary porosity can be regarded as the percentage of the weight of the capillary water to the volume of the natural soil body, thus
In the method, in the process of the invention,is the weight of natural soil after water absorption, +.>For drying earth weight, the herb is added with>Is the volume of the ring cutter.
The foregoing is merely illustrative of the present invention, and the scope of the present invention is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the scope of the present invention, and therefore, the scope of the present invention shall be defined by the scope of the appended claims.
Claims (3)
1. The utility model provides a soil capillary porosity survey device which characterized in that: the device comprises a beaker (1), a ring cutter (2) and a fixing frame (3), wherein the lower end of the ring cutter (2) is sleeved on a boss (4) at the bottom in the beaker (2), the fixing frame (3) is arranged at the upper section of the bottom, the fixing frame (3) is of a circular ring structure, the outer cylindrical surface of the fixing frame is clung to the bottom of the beaker (1), a fixing net (5) made of elastic materials is arranged on the upper end surface of the fixing net, the fixing net (5) is sleeved on the ring cutter (2), coarse filter paper (6) is arranged at the bottom of the beaker (1), the coarse filter paper (6) covers the whole bottom of the beaker (1), and a frosted glass sheet (7) is covered at the top of the beaker (1); the measuring method of the soil capillary porosity measuring device comprises the following steps:
(1) Spreading the rough filter paper at the bottom of the inner side of the beaker and covering the boss, then adding quantitative water into the beaker, wherein the water surface is lower than the boss, and the part of the rough filter paper which is added on the boss contacts the water surface;
(2) Then the collected ring cutter sample passes through a double-layer fixed net on a fixed frame, the lower end of the ring cutter sample is arranged on a boss paved with rough filter paper, the soil in the ring cutter sample can be ensured to be contacted with the rough filter paper, and a ground glass sheet is covered;
(3) Recording test time, wherein the adopted soil is sandy soil for 4-6 hours, and the clay soil for 8-12 hours;
(4) Immediately after reaching the set time, the weight was recorded as W 1 After weighing, placing the ring cutter sample on the boss to continue water absorption, and after the weighing time is reached, carrying out next weighing and recording as W 2 Until the absolute value of the weight difference measured in two adjacent times is less than 0.2, the last weight W is used n Water and soil sample weight absorbed by the soil;
(5) And (3) calculating the porosity of the soil capillary: porosity of soil capillary
In which W is n Is the weight of natural soil after water absorption, W g To dry the soil, V h Is the volume of the ring cutter.
2. The soil capillary porosity measuring device according to claim 1, wherein: the diameter of the boss (4) is 0.5 cm to 1cm larger than the diameter of the cutting ring.
3. The soil capillary porosity measuring device according to claim 1, wherein: the fixed net (5) is provided with two layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710019519.8A CN106525695B (en) | 2017-01-10 | 2017-01-10 | Soil capillary porosity measuring device and measuring method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710019519.8A CN106525695B (en) | 2017-01-10 | 2017-01-10 | Soil capillary porosity measuring device and measuring method thereof |
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| Publication Number | Publication Date |
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| CN106525695A CN106525695A (en) | 2017-03-22 |
| CN106525695B true CN106525695B (en) | 2023-09-01 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595976B (en) * | 2019-08-07 | 2021-06-15 | 中国水利水电科学研究院 | Experimental device and method for rapidly measuring porosity of soil in field |
| CN111077054B (en) * | 2019-12-25 | 2022-05-27 | 北京林业大学 | Soil water permeability pore measuring device and using method thereof |
| CN111610131B (en) * | 2020-06-01 | 2021-04-13 | 浙江大学 | Soil porosity nondestructive testing device and method thereof |
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| CN106525695A (en) | 2017-03-22 |
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