CN114112476B - Device and method for partitioned sampling of root system soil mechanics test - Google Patents
Device and method for partitioned sampling of root system soil mechanics test Download PDFInfo
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- CN114112476B CN114112476B CN202111442575.5A CN202111442575A CN114112476B CN 114112476 B CN114112476 B CN 114112476B CN 202111442575 A CN202111442575 A CN 202111442575A CN 114112476 B CN114112476 B CN 114112476B
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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
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
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- 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
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/108—Rainwater harvesting
Abstract
The invention discloses a device for sampling in a partition manner for testing root soil mechanics, which comprises a sampling device, wherein the sampling device comprises a bolt and a frame cylinder; the bottom of the sampling device is provided with a water collecting tank which is used for collecting redundant water for plant growth; the periphery of the inner part of the water collecting tank is connected with a frame cylinder through threads; the upper end of the water collecting tank is provided with a base; assembling a sampling device, filling soil, compacting according to the required compactness, planting plants to be researched, performing maintenance management, and determining the growth period required by research; 1. when an indoor test is carried out, the device does not need outdoor sampling, and the plant is planted indoors, so that the research on the force system of the root soil complex is facilitated; 2. the test device adopts a detachable sampling device, and is convenient to install and detach; 3. the device is internally provided with a plurality of areas, and when the test is performed, the partition sampling can be realized by disassembling the sequence and the number of the organic glass plates, and meanwhile, the spalling damage of the original soil sample is avoided.
Description
Technical Field
The invention relates to the technical field of soil sampling, in particular to a device and a method for sampling soil in a partition manner in a root system soil mechanics test.
Background
In the research of slope stability, the vegetation system is found to be beneficial to conservation of water sources, water and soil conservation and help to improve ecological environment, rainwater can be effectively intercepted when sudden heavy rain occurs, and plant root systems have good reinforcement and anchoring effects on the slope. In the field of geotechnical engineering, in the indoor test for researching a root soil complex, scientific researchers mainly conduct direct shear test, triaxial compression test, lateral limit compression test, single root and group root tensile test and the like to research the mechanical properties of the root soil complex.
Indoor tests need to be carried out outdoor soil sample site selection, and the soil taking sites often have the conditions of mixed filling soil and uneven growth of plant root systems, so that the mechanical properties of the root soil complex cannot be accurately researched. Meanwhile, the existing plant sampling device is simple in structure, the scientific research needs cannot be met, firstly, the integral type is large in occupied area, space is wasted when the device is not used, secondly, the box body is made of non-transparent materials, growth of plant root systems cannot be directly observed and known, thirdly, the existing planting box is only satisfactory for vegetation planting functions and is not used for root soil compound physical testing, and because the root soil compound physical testing sample is easy to spall and destroy when being taken, the complete undisturbed soil sample cannot be cut out for scientific research and test.
Chinese patent application CN 108901457A discloses a novel detachable flowerpot, and the flowerpot passes through the curb plate that the buckle links to each other and bottom plate is constituteed, and the buckle is installed on the bottom plate. The following problems still remain: 1) Each side surface of the patent consists of a complete plate, so that regional sampling cannot be met, and soil spalling damage can be caused when soil samples are taken; 2) This patent flowerpot passes through the buckle to be connected, if the soil sample is more, can lead to the steadiness of flowerpot relatively poor.
Disclosure of Invention
The invention solves the problems that the soil sample can not be accurately acquired and the soil sample can not be completely acquired.
In order to achieve the above purpose, the present invention provides the following technical solutions: the device for sampling the root soil mechanics test in a partition way comprises a sampling device, wherein the sampling device comprises a bolt and a frame cylinder;
the bottom of the sampling device is provided with a water collecting tank which is used for collecting redundant water for plant growth; the periphery of the inner part of the water collecting tank is connected with a frame cylinder through threads;
the upper end of the water collecting tank is provided with a base; assembling a sampling device, filling soil, compacting according to the required compactness, planting plants to be researched, performing maintenance management, and determining the growth period required by research;
the frame column is divided into 4 frame corner columns and 4 frame side columns; organic glass plates are inserted between the frame cylinders, and the upper layer of the organic glass plates are connected with the lower layer of the organic glass plates by transverse connecting pieces;
four corners of the transverse connecting piece are provided with 4 frame corner column holes, and the transverse connecting piece is arranged in the middle of the frame column; transparent plastic paper is adhered on the inner wall of the organic glass plate;
a bolt is used for fixing the transverse connecting piece and the frame corner post of the frame cylinder;
when the plant grows to a growth period required by research, determining a sampling area of a sampling device, sampling root soil, and firstly taking an upper soil sample; dividing the area into six areas I, II, III, I, II and III, firstly removing organic glass plates on the front side, the rear side and the left side of the area I, removing floating soil and plant roots and leaves on the surface of soil, sampling in the area I according to the mechanical property of the soil of a test root system, removing the organic glass plates on the front side and the rear side of the area II after the soil sample is taken, and sampling; removing the organic glass plates at the front, rear and right sides of the region III, and sampling; after the upper soil sampling is completed, removing the transverse connecting piece, leveling surface layer floating soil, and then taking a lower soil sample; areas I, II and III of areas IV, V and VI pay attention to prevent spalling and damage of soil samples when the organic glass plates and the transverse connecting pieces are removed, so that soil sampling is realized.
Preferably, the base is provided with the wash port, base four corners department runs through and sets up first screw hole the base long limit department runs through and sets up 2 first screw holes, sets up long banding third V-arrangement recess between the adjacent first screw hole, and third V-arrangement recess size is identical with the size that organic glass board bottom set up.
Preferably, the frame column is provided with a long first V-shaped groove on the side surface, the size of the first V-shaped groove is identical to the size of two sides of the organic glass plate, the first V-shaped grooves of the frame corner columns are mutually vertical, the first V-shaped grooves of the frame side columns are mutually parallel, and the middle part of the frame corner column is provided with a pair of vertical second bolt holes; the frame corner post is inserted to the first screw holes at four corners of the base in a screw mode and is prolonged to serve as a base support, and the frame corner post is inserted to the first screw holes at the long side of the base in a screw mode.
Preferably, vaseline is smeared on the inner wall of the organic glass plate, and transparent plastic paper is closely adhered to the inner wall of the box body, so that model soil can be prevented from adhering to the inner wall of the box body, and the plate is convenient to detach and clean a soil sample; meanwhile, rubber materials are closely adhered to the positions, so that the sealing and seepage preventing effects are achieved.
Preferably, the transverse connecting piece is in a shape like a Chinese character 'hui', the four corners of the transverse connecting piece are penetrated and provided with corner post holes with diameters slightly larger than those of the frames, the middle parts of the four corners along the height direction are provided with a pair of mutually perpendicular bolt holes, the long sides of the transverse connecting piece are respectively penetrated and provided with 2 frame side post holes, the upper surface and the lower surface between the adjacent frame corner post holes or frame side post holes are respectively provided with a strip-shaped and a second V-shaped groove, and the size of the second V-shaped groove is identical with the size of the cross section of the top or the bottom of the organic glass plate; the transverse connecting piece is placed in the middle of the frame cylinder and used for improving the rigidity and stability of the sampling device.
Preferably, a pair of bolt holes along the height direction of the cross connecting member and a pair of mutually perpendicular second bolt holes of the frame corner post, by which the frame cylinder and the cross connecting member are fixed.
Compared with the prior art, the invention has the following beneficial effects:
1. when an indoor test is carried out, the device does not need outdoor sampling, and the plant is planted indoors, so that the research on the force system of the root soil complex is facilitated; 2. the detachable sampling device is adopted in the test device, so that the device is simple and convenient to mount and detach, and the space utilization rate in a laboratory can be greatly improved by the aid of the detachable sampling device after the test is finished; 3. the device is internally provided with a plurality of areas, and when the test is performed, the partition sampling can be realized by disassembling the sequence and the number of the organic glass plates, and meanwhile, the spalling damage of the original soil sample is avoided.
Drawings
FIG. 1 is a schematic diagram of an overall structure of a sampling device according to an embodiment of the present invention;
FIG. 2 is a front view of a sampling device according to an embodiment of the present invention;
FIG. 3 is a side view of a sampling device according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a structure of an organic glass plate of a sampling device according to an embodiment of the present invention, wherein a1 is a schematic diagram of a structure of an upper organic glass plate; a2 is a schematic diagram of the structure of the lower organic glass plate;
FIG. 5 is a schematic diagram of a frame cylinder structure of a sampling device according to an embodiment of the present invention, wherein b1 is a schematic diagram of a corner column structure; b2 is a schematic side column structure;
FIG. 6 is a top view of a cross-connector of a sampling device according to an embodiment of the present invention;
FIG. 7 is a top view of a base of a sampling device according to an embodiment of the present invention;
FIG. 8 is a diagram showing the effect of a water collection tank of a sampling device according to an embodiment of the present invention;
fig. 9 is a schematic view of a soil sample region of a sampling device according to an embodiment of the present invention.
In the figure: 1. a water collection tank; 2. a base; 3. a frame cylinder; 4. a plexiglass plate; 5. a transverse connector; 6. transparent plastic paper; 7. a drain hole; 8. a first V-shaped groove; 9. a second V-shaped groove; 10. threads on the frame cylinder; 11. a bolt; 12. a third V-shaped groove; 13. a base support; 14. a threaded hole; 15. a frame corner post hole; 16. a first bolt hole; 17. a second bolt hole; 18. and a frame side column hole.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-9, the present invention provides a technical solution: a testing method of a device for sampling in a partition manner for testing root soil mechanics comprises the following steps:
step 1: assembling a sampling device, filling soil, compacting according to the required compactness, planting plants to be researched, performing maintenance management, and determining the growth period required by research;
step 2: when the plants grow to the growth period required for research, soil sampling is performed: when the plant grows to a growth period required by research, determining a sampling area of a sampling device, sampling root soil, and firstly taking an upper soil sample; dividing the area into six areas I, II, III, I, II and III, firstly removing the organic glass plates 4 on the front side, the rear side and the left side of the area I, removing floating soil and plant roots and leaves on the surface of soil, sampling in the area I according to the mechanical property of the soil of the test root system, removing the organic glass plates 4 on the front side and the rear side of the area II after the soil sample is taken, and sampling; removing the organic glass plates 4 on the front, rear and right sides of the region III, and sampling; after the upper soil sampling is completed, removing the transverse connecting piece 5, leveling surface layer floating soil, and then taking a lower soil sample; areas I, II and III of areas IV, V and VI pay attention to prevent the spalling and the damage of soil samples when the organic glass plate 4 and the transverse connecting piece 5 are removed, so that the soil sampling is realized.
Step 3: and after the sampling is completed, performing an indoor test of the mechanical property of the root soil.
Step 4: after the test is completed, the device is cleaned, wiped and retracted.
Further, the indoor test for testing the mechanical properties of the root soil comprises a penetration test, a lateral limit compression test, a triaxial compression test and a direct shear test:
(1) penetration test: phi 61.8X10 mm was used with a volume of 120cm 3 Sampling according to the specification in the corresponding area;
(2) lateral limit compression test: phi 79.8X10 mm was used with a volume of 100cm 3 Sampling according to the specification in the corresponding area;
(3) triaxial compression experiment: cutting a soil column with a size slightly larger than a specified size (diameter 39.1mm and height 80 mm) in a corresponding area according to a standard by using a soil cutter;
(4) direct shear test:phi 61.8X10 mm was used with a volume of 60cm 3 Is sampled according to the specification in the corresponding area.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The device for sampling the soil mechanics test of the root system in a partition way is characterized by comprising a sampling device, wherein the sampling device comprises a bolt (11) and a frame cylinder (3);
the bottom of the sampling device is provided with a water collection tank (1), and the water collection tank (1) is used for collecting redundant water for plant growth; the periphery of the inner part of the water collecting tank (1) is connected with a frame cylinder (3) through threads;
the upper end of the water collection tank (1) is provided with a base (2); assembling a sampling device, filling soil, compacting according to the required compactness, planting plants to be researched, performing maintenance management, and determining the growth period required by research;
the frame column (3) is divided into 4 frame corner columns and 4 frame side columns; an organic glass plate (4) is inserted between the frame cylinders (3), and the organic glass plates (4) on the upper layer and the lower layer are connected by a transverse connecting piece (5);
four corners of the transverse connecting piece (5) are provided with 4 frame corner column holes (15), and the transverse connecting piece (5) is arranged in the middle of the frame column (3); transparent plastic paper (6) is adhered on the inner wall of the organic glass plate (4);
the bolts (11) are used for fixing the transverse connecting piece (5) and the frame corner posts of the frame cylinder (3);
when the plant grows to a growth period required by research, determining a sampling area of a sampling device, sampling root soil, and firstly taking an upper soil sample; dividing the area into six areas I, II, III, I, II and III, firstly removing organic glass plates (4) on the front side, the rear side and the left side of the area I, removing floating soil and plant roots and leaves on the surface of soil, sampling in the area I according to the mechanical property of the soil of the test root system, and removing the organic glass plates (4) on the front side and the rear side of the area II after the soil sample is taken; removing the organic glass plates (4) on the front side, the rear side and the right side of the area III, and sampling; after the upper soil sampling is completed, removing the transverse connecting piece (5), leveling surface layer floating soil, and then taking a lower soil sample; areas I, II and III of areas IV, V and VI pay attention to prevent spalling and damage of soil samples when the organic glass plate (4) and the transverse connecting piece (5) are removed, and soil sampling is achieved.
2. The device for partitioned sampling for root soil mechanics testing according to claim 1, wherein the base (2) is provided with a drain hole (7), the four corners of the base (2) are provided with first threaded holes (14) in a penetrating manner, the long sides of the base (2) are provided with 2 first threaded holes (14) in a penetrating manner, a long-strip-shaped third V-shaped groove (12) is arranged between the adjacent first threaded holes (14), and the size of the third V-shaped groove (12) is identical with the size arranged at the bottom of the organic glass plate (4).
3. The device for partitioned sampling for root soil mechanics test according to claim 1, wherein the frame column (3) is provided with a long first V-shaped groove (8) on the side surface, the size of the first V-shaped groove (8) is matched with the size of two sides of the organic glass plate, the first V-shaped grooves (8) of the frame corner columns are mutually perpendicular, the first V-shaped grooves (8) of the frame corner columns are mutually parallel, and the middle part of the frame corner column is provided with a pair of vertical second bolt holes (17); the frame corner posts are inserted into the first threaded holes (14) at four corners of the base (2) in a screwed mode and extend to serve as base supports (13), and the frame corner posts are inserted into the first threaded holes (14) at the long sides of the base (2) in a screwed mode.
4. The device for sampling the soil in a partition manner for testing the soil mechanics of the root system according to claim 1, wherein the organic glass plate (4) is coated with vaseline on the inner wall, and the transparent plastic paper (6) is closely adhered to the inner wall of the box body, so that the model soil can be prevented from adhering to the inner wall of the box body, and the plate is convenient to detach and clean the soil sample; meanwhile, rubber materials are closely adhered to the positions, so that the sealing and seepage preventing effects are achieved.
5. The device for partitioned sampling for root soil mechanics test according to claim 1, wherein the transverse connecting piece (5) is in a shape of a Chinese character 'hui', the four corners of the transverse connecting piece are provided with a plurality of through holes (15) with diameters slightly larger than those of the frame corner posts, the middle parts of the four corners along the height direction are provided with a pair of mutually perpendicular bolt holes (16), the long sides of the transverse connecting piece (5) are respectively provided with 2 frame side post holes (18) in a penetrating way, the upper surface and the lower surface between the adjacent frame corner post holes (15) or frame side post holes (18) are respectively provided with a strip-shaped second V-shaped groove (9), and the size of the second V-shaped groove (9) is consistent with the size of the cross section of the top or the bottom of the organic glass plate; the transverse connecting piece (5) is arranged in the middle of the frame cylinder (3) and used for improving the rigidity and the stability of the sampling device.
6. The apparatus for zonal sampling for root soil mechanics testing according to claim 1, wherein: a pair of bolt holes (16) along the height direction of the transverse connecting piece (5) and a pair of mutually perpendicular second bolt holes (17) of the frame corner post are used for fixing the frame cylinder (3) and the transverse connecting piece (5) through the bolts (11).
7. The method for testing the device for sampling the soil in a partition for testing the soil mechanics of a root system according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
step 1: assembling a sampling device, filling soil, compacting according to the required compactness, planting plants to be researched, performing maintenance management, and determining the growth period required by research;
step 2: when the plant grows to a growth period required by research, sampling soil;
step 3: after sampling is completed, performing an indoor test of mechanical properties of root soil;
step 4: after the test is completed, the device is cleaned, wiped and retracted.
8. The method for testing the device for sampling the soil in a partition for testing soil mechanics of a root system according to claim 7, wherein: the indoor test for testing the mechanical properties of the root soil comprises a penetration test, a lateral limit compression test, a triaxial compression test and a direct shear test:
(1) penetration test: phi 61.8X10 mm was used with a volume of 120cm 3 Sampling according to the specification in the corresponding area;
(2) lateral limit compression test: phi 79.8X10 mm was used with a volume of 100cm 3 Sampling according to the specification in the corresponding area;
(3) triaxial compression experiment: cutting soil columns with the size larger than a specified size according to the specification in the corresponding area by using a soil cutter, wherein the specified size is as follows: the diameter is 39.1mm, and the height is 80mm;
(4) direct shear test: phi 61.8X10 mm was used with a volume of 60cm 3 Is sampled according to the specification in the corresponding area.
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| CN114112476B true CN114112476B (en) | 2023-08-11 |
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2021
- 2021-11-30 CN CN202111442575.5A patent/CN114112476B/en active Active
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| WO2016196734A1 (en) * | 2015-06-03 | 2016-12-08 | Ramesh Chandra Gupta | Test device for determining three-dimensional consolidation properties of soils |
| CN105910873A (en) * | 2016-07-07 | 2016-08-31 | 河海大学 | Preparation method of undisturbed sample for laboratory test of mechanical properties of reinforced plant soil |
| CN107192650A (en) * | 2017-04-14 | 2017-09-22 | 广西交通科学研究院有限公司 | Seal with wax the method for taking undisturbed soil permeability test soil sample |
| CN110018097A (en) * | 2019-03-27 | 2019-07-16 | 哈尔滨工业大学（深圳） | The two-way seepage through soil mass experimental rig and test method of the detachable sample preparation sampling of multilayer |
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