CN114112476A - Device for sampling in partition mode for root system soil mechanics test and test method - Google Patents

Device for sampling in partition mode for root system soil mechanics test and test method Download PDF

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CN114112476A
CN114112476A CN202111442575.5A CN202111442575A CN114112476A CN 114112476 A CN114112476 A CN 114112476A CN 202111442575 A CN202111442575 A CN 202111442575A CN 114112476 A CN114112476 A CN 114112476A
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sampling
soil
test
frame
organic glass
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CN114112476B (en
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佘芳涛
李超
朱记伟
王松鹤
吴征奇
陶磊
周伟踪
王立杰
邓志鹏
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Xian University of Technology
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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
    • 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

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
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  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The invention discloses a device for sampling in a partition way for root soil mechanics testing, which comprises a sampling device, a sampling device and a sampling device, wherein the sampling device comprises a bolt and a frame cylinder; a water collecting tank is arranged at the bottom of the sampling device and used for collecting the redundant moisture generated by the growth of the plants; the periphery of the inside of the water collecting tank is in threaded connection with a frame cylinder; the upper end of the water collecting tank is provided with a base; assembling the sampling device, filling soil, compacting according to the required compaction degree, planting plants to be researched, performing maintenance management, and determining the growth period required by the research; 1. when an indoor test is carried out, outdoor sampling is not needed, and the research on the mechanical system of the root-soil complex is facilitated by planting plants indoors; 2. the test device adopts a detachable sampling device, and is simple and convenient to mount and dismount; 3. the device is inside to be divided into a plurality of regions, and during the experimental sample, through order and the quantity of dismantling the organic glass board, can realize the subregion sample, avoids simultaneously that the original state soil sample of getting to take place the spalling to destroy.

Description

Device for sampling in partition mode for root system soil mechanics test and test method
Technical Field
The invention relates to the technical field of soil sampling, in particular to a device and a method for sampling in a partition mode for root soil mechanics testing.
Background
In the process of researching the stability of the side slope, the vegetation system is beneficial to conserving water sources, maintaining water and soil, helping to improve the ecological environment, effectively intercepting rainwater when sudden rainstorm occurs, and the root system of the plant can better perform the functions of reinforcement and anchoring on the slope. In the field of geotechnical engineering and indoor tests for researching root-soil composites, researchers mainly conduct direct shear tests, triaxial compression tests, lateral confinement compression tests, single root and root group tensile tests and the like to research mechanical properties of the root-soil composites.
In an indoor test, soil sample site selection needs to be carried out outdoors, and the mechanical properties of a root-soil composite body cannot be accurately researched due to the fact that miscellaneous filling soil and the root system growth of plants are uneven in a soil sampling field. Simultaneously current plant sampling device simple structure, can't satisfy the scientific research needs, one of them, with integral many, area is big, waste space when not using, its two, the box is made by non-transparent material, can't direct observation and understanding plant roots's growth, its three, current planting case only satisfies in vegetation planting function, is not used for root-soil complex body mechanics test, when taking because root-soil complex body mechanics test sample, the root-soil complex body is easy to spall and destroys, can't cut out complete original state soil sample, be used for scientific research and test.
Chinese patent application CN 108901457 a discloses a novel detachable flowerpot, which is composed of a side plate and a bottom plate connected by a buckle, wherein 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 and connects, if soil sample is when 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 collected and can not be completely obtained.
In order to achieve the purpose, the invention provides the following technical scheme: a device for sampling in a partition way for root soil mechanics testing comprises a sampling device, wherein the sampling device comprises a bolt and a frame cylinder;
a water collecting tank is arranged at the bottom of the sampling device and used for collecting the redundant moisture generated by the growth of the plants; the periphery of the inside of the water collecting tank is in threaded connection with a frame cylinder;
the upper end of the water collecting tank is provided with a base; assembling the sampling device, filling soil, compacting according to the required compaction degree, planting plants to be researched, performing maintenance management, and determining the growth period required by the 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;
the four corners of the transverse connecting piece are provided with 4 frame corner post holes, and the transverse connecting piece is arranged in the middle of the frame post; transparent plastic paper is adhered to the inner wall of the organic glass plate;
the transverse connecting piece and a frame corner column of the frame cylinder are fixed by bolts;
when the plant grows to the growth period required by the research, determining the area sampled by the sampling device, sampling root soil, and firstly sampling upper soil; dividing the area into six areas I, II, III, I, II and III, 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 soil surface, sampling in the area I according to the tested root soil mechanical property, removing the organic glass plates on the front side and the rear side of the area II after the soil sample is completely sampled, and sampling; removing the organic glass plates on the front side, the rear side and the right side of the area III, and sampling; after sampling the upper soil layer, removing the transverse connecting piece, leveling the surface layer floating soil, and then sampling the lower soil layer; areas IV, V and VI are the same as areas I, II and III, and when the organic glass plate and the transverse connecting piece are disassembled, the spalling damage of the soil sample is prevented, so that the sampling of the soil is realized.
Preferably, the base is provided with a drain hole, first threaded holes are formed in four corners of the base in a penetrating mode, 2 first threaded holes are formed in the long edge of the base in a penetrating mode, a third strip-shaped V-shaped groove is formed between every two adjacent first threaded holes, and the size of the third V-shaped groove is matched with the size of the bottom of the organic glass plate.
Preferably, the side surface of the frame column is provided with a first strip-shaped V-shaped groove, the size of the first V-shaped groove is matched with the size of two sides of the organic glass plate, the first V-shaped grooves of the frame corner columns are vertical to each other, the first V-shaped grooves of the frame side columns are parallel to each other, and the middle part of each frame corner column is provided with a pair of vertical second bolt holes; the frame corner post is spirally inserted into first threaded holes at four corners of the base and is extended to serve as a base support, and the frame side post is spirally inserted into first threaded holes at the long edge of the base.
Preferably, the inner wall of the organic glass plate is coated with vaseline and closely attached with transparent plastic paper, so that model soil can be prevented from being adhered to the inner wall of the box body, and the disassembly of the plate and the cleaning of a soil sample are facilitated; meanwhile, the rubber material is closely adhered to the position, so that the effect of sealing and seepage prevention is achieved.
Preferably, the transverse connecting piece is in a shape like a Chinese character 'hui', the four corners are provided with a through hole with a diameter slightly larger than that of a frame corner post hole, the middle parts of the four corners in the height direction are provided with a pair of mutually vertical bolt holes, the long sides of the transverse connecting piece are respectively provided with 2 frame side post holes in a through way, the upper surface and the lower surface between the adjacent frame corner post holes or frame side post holes are provided with long strips and second V-shaped grooves, and the size of each second V-shaped groove is matched 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 second bolt holes perpendicular to each other of the frame corner posts fix the frame pillar and the cross connecting member by the bolts.
Compared with the prior art, the invention has the following beneficial effects:
1. when an indoor test is carried out, outdoor sampling is not needed, and the research on the mechanical system of the root-soil complex is facilitated by planting plants indoors; 2. the testing device adopts a detachable sampling device, is simple and convenient to mount and dismount, and can greatly improve the space utilization rate in a laboratory after the test is finished; 3. the device is inside to be divided into a plurality of regions, and during the experimental sample, through order and the quantity of dismantling the organic glass board, can realize the subregion sample, avoids simultaneously that the original state soil sample of getting to take place the spalling to destroy.
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 plexiglass plate structure of a sampling device according to an embodiment of the present invention, wherein a1 is a schematic diagram of an upper plexiglass plate structure; a2 is a schematic diagram of a lower organic glass plate structure;
FIG. 5 is a schematic diagram of a frame column structure of a sampling device according to an embodiment of the present invention, wherein b1 is a schematic diagram of an angle 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 illustrating the effect of the water collection tank of the sampling device according to the embodiment of the present invention;
fig. 9 is a schematic view of a soil sample area 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. an organic glass 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. frame side post hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-9, the present invention provides a technical solution: a testing method of a device for sampling in a partition mode for root soil mechanics testing comprises the following steps:
step 1: assembling the sampling device, filling soil, compacting according to the required compaction degree, planting plants to be researched, performing maintenance management, and determining the growth period required by the research;
step 2: when the plant grows to the growth period required by the research, soil sampling is carried out: when the plant grows to the growth period required by the research, determining the area sampled by the sampling device, sampling root soil, and firstly sampling upper soil; dividing the area into six areas I, II, III, I, II and III, removing the organic glass plates 4 on the front, back and left sides of the area I, removing the floating soil and plant roots and leaves on the soil surface, sampling in the area I according to the mechanical property of the soil of the tested root system, removing the organic glass plates 4 on the front and back sides of the area II after the soil sample is completely collected, and sampling; removing the organic glass plates 4 on the front side, the rear side and the right side of the area III, and sampling; after sampling the upper soil layer, removing the transverse connecting piece 5, leveling the surface layer floating soil, and then sampling the lower soil layer; regions IV, V and VI are the same as regions I, II and III, and when the organic glass plate 4 and the transverse connecting piece 5 are removed, the spalling damage of the soil sample is prevented, so that the sampling of the soil is realized.
And step 3: after sampling, carrying out an indoor test on the mechanical property of the root soil.
And 4, step 4: after the test is finished, the device is cleaned, wiped dry and retracted.
Further, the indoor test for testing the mechanical property of the root soil comprises a penetration test, a lateral limit compression test, a triaxial compression test and a direct shearing test:
penetration test: using a diameter of 61.8X 40mm and a volume of 120cm3The cutting ring of (2) sampling in the corresponding area according to the standard;
second, side limit compression test: using a diameter of 79.8X 20mm and a volume of 100cm3The cutting ring of (2) sampling in the corresponding area according to the standard;
third, triaxial compression experiment: cutting a soil column slightly larger than a specified size (the diameter is 39.1mm, the height is 80mm) in a corresponding area according to specifications by using a soil cutting knife;
fourthly, direct shear test: using a diameter of 61.8X 20mm and a volume of 60cm3The cutting ring of (2) samples in the corresponding area according to the standard.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments 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. A device for sampling in a subarea way for root soil mechanics testing is characterized by comprising a sampling device, wherein the sampling device comprises a bolt (11) and a frame cylinder (3);
a water collecting tank (1) is arranged at the bottom of the sampling device, and the water collecting tank (1) is used for collecting the redundant moisture generated by the growth of plants; the periphery of the inside of the water collecting tank (1) is in threaded connection with a frame cylinder (3);
the upper end of the water collecting tank (1) is provided with a base (2); assembling the sampling device, filling soil, compacting according to the required compaction degree, planting plants to be researched, performing maintenance management, and determining the growth period required by the research;
the frame column (3) is divided into 4 frame corner columns and 4 frame side columns; organic glass plates (4) are inserted between the frame columns (3), and the upper layer and the lower layer of the organic glass plates (4) are connected by a transverse connecting piece (5);
the four corners of the transverse connecting piece (5) are provided with 4 frame corner post holes (15), and the transverse connecting piece (5) is arranged in the middle of the frame post (3); transparent plastic paper (6) is adhered to the inner wall of the organic glass plate (4);
the bolt (11) is used for fixing the transverse connecting piece (5) and a frame corner post of the frame column (3);
when the plant grows to the growth period required by the research, determining the area sampled by the sampling device, sampling root soil, and firstly sampling upper soil; dividing the area into six areas I, II, III, I, II and III, removing the organic glass plates (4) on the front, back and left sides of the area I, removing the floating soil and plant roots and leaves on the soil surface, sampling in the area I according to the mechanical property of the soil of the tested root system, removing the organic glass plates (4) on the front and back sides of the area II after the soil sample is completely collected, and sampling; removing the organic glass plates (4) on the front side, the rear side and the right side of the area III, and sampling; after sampling the upper soil layer, removing the transverse connecting piece (5), leveling the surface layer floating soil, and then sampling the lower soil layer; areas IV, V and VI are the same with areas I, II and III, and when the organic glass plate (4) and the transverse connecting piece (5) are disassembled, the spalling damage of the soil sample is prevented, so that the soil sampling is realized.
2. The device for sampling the root soil mechanics test subareas according to claim 1, wherein the base (2) is provided with drain holes (7), first threaded holes (14) are formed through the four corners of the base (2), 2 first threaded holes (14) are formed through the long sides of the base (2), an elongated third V-shaped groove (12) is formed between the adjacent first threaded holes (14), and the size of the third V-shaped groove (12) is matched with the size of the bottom of the organic glass plate (4).
3. The device for sampling the root soil mechanics test subareas according to claim 1, wherein the frame column (3) is provided with first elongated V-shaped grooves (8) on the side surfaces, the size of the first V-shaped grooves (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 perpendicular to each other, the first V-shaped grooves (8) of the frame side columns are parallel to each other, and the middle part of the frame corner columns is provided with a pair of perpendicular second bolt holes (17); the frame corner post is spirally inserted into first threaded holes (14) at four corners of the base (2) and is extended to serve as a base support (13), and the frame side post is spirally inserted into first threaded holes (14) at the long edges of the base (2).
4. The device for sampling the root system soil mechanics test subareas according to claim 1, wherein Vaseline is coated on the inner wall of the organic glass plate (4), and transparent plastic paper (6) is closely attached 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 disassembly of plates and the cleaning of a soil sample are facilitated; meanwhile, the rubber material is closely adhered to the position, so that the effect of sealing and seepage prevention is achieved.
5. The device for sampling the root soil mechanics test partition according to claim 1, wherein the transverse connecting member (5) is in a shape like a Chinese character 'hui', the four corners of the transverse connecting member are penetrated with bolt holes (16) with a diameter slightly larger than that of the frame corner post holes (15), the middle parts of the four corners in the height direction are processed with a pair of mutually perpendicular bolt holes, the long sides of the transverse connecting member (5) are penetrated with 2 frame corner post holes (18), the upper and lower surfaces between the adjacent frame corner post holes (15) or the frame corner post holes (18) are respectively provided with a strip and a second V-shaped groove (9), and the size of the second V-shaped groove (9) is matched with the size of the top or bottom cross section of the organic glass plate; the transverse connecting piece (5) is placed in the middle of the frame column (3) and used for improving the rigidity and stability of the sampling device.
6. The device for sampling the root system soil mechanics test subareas 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 second bolt holes (17) perpendicular to each other of the frame corner posts fix the frame column (3) and the transverse connecting piece (5) through the bolts (11).
7. The method for testing the device for sampling the root system soil mechanics test subareas according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
step 1: assembling the sampling device, filling soil, compacting according to the required compaction degree, planting plants to be researched, performing maintenance management, and determining the growth period required by the research;
step 2: when the plant grows to the growth period required by the research, soil sampling is carried out;
and step 3: after sampling is finished, carrying out an indoor test on the mechanical property of the root soil;
and 4, step 4: after the test is finished, the device is cleaned, wiped dry and retracted.
8. The method for testing the device for sampling the root system soil mechanics test subareas according to claim 7, wherein the method comprises the following steps: testing indoor test of mechanical properties of root soil is that penetration test, side limit compression test, triaxial compression test, direct shear test:
penetration test: using a diameter of 61.8X 40mm and a volume of 120cm3The cutting ring of (2) sampling in the corresponding area according to the standard;
second, side limit compression test: using a diameter of 79.8X 20mm and a volume of 100cm3The cutting ring of (2) sampling in the corresponding area according to the standard;
third, triaxial compression experiment: cutting earth pillars with sizes larger than the specified size in the corresponding area according to the specification by using an earth cutting knife, wherein the specified size is as follows: the diameter is 39.1mm, and the height is 80 mm;
fourthly, direct shear test: using a diameter of 61.8X 20mm and a volume of 60cm3The cutting ring of (2) samples in the corresponding area according to the standard.
CN202111442575.5A 2021-11-30 2021-11-30 Device and method for partitioned sampling of root system soil mechanics test Active CN114112476B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
WO2016196734A1 (en) * 2015-06-03 2016-12-08 Ramesh Chandra Gupta Test device for determining three-dimensional consolidation properties of soils
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Non-Patent Citations (1)

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Title
余冬梅;付江涛;胡夏嵩;赵丹;刘亚斌;祁兆鑫;李淑霞;: "柴达木盆地大柴旦盐湖区盐生植物根-土复合体力学强度试验研究", 盐湖研究, no. 01 *

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