CN108709767B - Soil sampler - Google Patents
Soil sampler Download PDFInfo
- Publication number
- CN108709767B CN108709767B CN201810834253.7A CN201810834253A CN108709767B CN 108709767 B CN108709767 B CN 108709767B CN 201810834253 A CN201810834253 A CN 201810834253A CN 108709767 B CN108709767 B CN 108709767B
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- Prior art keywords
- box body
- outer box
- soil
- blade
- stay wire
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- 239000002689 soil Substances 0.000 title claims abstract description 70
- 238000005527 soil sampling Methods 0.000 claims abstract description 53
- 239000002985 plastic film Substances 0.000 claims abstract description 26
- 229920006255 plastic film Polymers 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000011160 research Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- 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
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material 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)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to an earth sampler, which is suitable for soft soil and belongs to the technical field of geotechnical engineering experimental equipment. The invention adopts the modes of blade cutting and plastic film sealing to separate the soil body in the box and the soil body outside the box, avoids the change of moisture in the soil body caused by suction, avoids the disturbance to the soil body, and can effectively improve the soil sampling effect. The device is easy to insert the soil sampler into soft soil and can avoid disturbance to weak soil in the soil sampling process. Meanwhile, the method ensures that the water in the soil body is not influenced in the soil sampling process; the soil sampling device is simple and is easy to operate by a single person.
Description
Technical Field
The invention relates to an earth sampler, which is particularly suitable for soft soil with larger natural water content, higher compressibility, lower bearing capacity and lower shear strength, and belongs to the technical field of geotechnical engineering experimental equipment.
Background
In engineering geological exploration and investigation work, in order to obtain physical and mechanical property indexes of foundation soil, at present, a means of performing an indoor geotechnical experiment after drilling and sampling is mainly adopted besides in-situ test. To obtain undisturbed soil samples that approximate natural structures, it is critical to improve sampling techniques and use advanced soil sampler.
In undisturbed soil sampling work, the quality of the sample directly influences the results of the indoor test, and further influences subsequent engineering geological evaluation and geotechnical engineering design. Due to the existence of soil sample disturbance, the real physical and mechanical characteristics of the soil body of the site cannot be accurately evaluated in the indoor test. The soil sample disturbance sources are various, and in the process of penetrating the soil sampler, the soil squeezing and friction action of the side wall of the soil sampler are important factors for causing the disturbance deformation of the soil body.
Foreign geotome research began in the 40-60 s of the 20 th century, with the main focus on undisturbed geotomes, mechanical geotomes and specialized geotomes. The spiral type and gravity hammering type are mainly adopted, so that the soil penetration resistance can be effectively reduced.
The research of the domestic soil sampler begins in the later 50 s of the 20 th century, xiong Yi, langerhans, gu Shugang, zhou Xue and the like are all researched, and the research of the domestic soil sampler is advanced to a certain extent until the 70 s of the 20 th century.
At present, the commonly adopted soil sampler is mainly a free piston thin-wall soil sampler, and a piston is utilized to seal a soil sampling pipe to form a sealed adsorption device so as to take out soil samples. In the process of taking out the soil sample, the adsorption force generated in the sealing device inevitably produces disturbance to the soil sample in the device, so that the physical and mechanical properties of the soil sample are changed, and the soil taking effect is not ideal.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the soil sampler can effectively avoid disturbance of suction force to soil samples and improve soil sampling effect.
The technical scheme adopted by the invention for solving the technical problems is as follows: the soil sampler comprises an external box body with an opening structure at the bottom end, wherein the external box body is rectangular, a cutting edge is arranged on the bottom end surface of the external box body along the four circumferential directions of the external box body, an external sleeve is fixedly connected to the upper surface of a top plate of the external box body, the external sleeve is perpendicular to the top plate of the external box body, a soil sampling box is sleeved in the external box body, the outer wall of the soil sampling box is in sliding fit with the inner wall of the external box body, the upper end and the lower end of the soil sampling box are both in an opening structure, and a push plate capable of closing the opening at the top end is arranged on the top end surface of the soil sampling box; one side of the push plate, which faces the top plate of the outer box body, is provided with a push rod, the push rod passes through the top plate of the outer box body and is sleeved on the inner wall of the outer sleeve, and the top end of the push rod extends out of the outer sleeve;
when the soil taking box moves to a dead point relative to a top plate of the outer box body, a slot is formed in the inner wall of the outer box body at the bottom end surface position of the soil taking box, the slot is horizontally arranged along the peripheral direction of the outer box body, a blade is arranged in the slot of one side wall, the blade is parallel to the side wall of the outer box body, the cutting direction of the blade is horizontally arranged towards the inside of the outer box body, one end of the blade is fixedly connected with a first pull wire, the other end of the blade is fixedly connected with a second pull wire, and the first pull wire and the second pull wire are arranged in parallel in the side wall of the outer box body and are perpendicular to the length direction of the blade; a plastic film is fixedly arranged between the first pull wire and the second pull wire on one side of the back of the blade, a cavity structure for accommodating the plastic film is arranged in the side wall of the outer box body, and the bottom end opening of the soil taking box can be completely closed by the specification and the size of the unfolded plastic film; the first stay wire and the second stay wire are arranged along the slot of the outer box body on the side of the blade edge of the blade, and penetrate through the side wall of the outer box body at the end of the slot until extending out from the top plate of the outer box body; by pulling the first and second pull lines, the blade and the plastic film can be horizontally moved along the slot on the inner wall of the outer box body.
Further is: and after the first pull wire and the second pull wire extend out of the top plate of the external box body at one side of the blade edge, the first pull wire and the second pull wire are fixedly connected through a cross rod.
Further is: on the back side of the blade, the first and second wires pass through the side wall of the outer box body until extending out from the top plate of the outer box body.
Further is: after the first stay wire and the second stay wire extend out of the top plate of the external box body on one side of the back of the blade, the end part of the first stay wire is connected with a first limiting block, and the end part of the second stay wire is connected with a second limiting block.
Further is: when the soil sampling box moves to a dead point relative to the top plate of the outer box body, the outer wall of the outer box body is provided with a positioning mark at the top end corresponding position of the soil sampling box.
Further is: the bottom of push rod is fixed connection perpendicularly with the push pedal.
Further is: one end of the push rod extending out of the outer sleeve is fixedly connected with a first handle.
Further is: the top end of the outer sleeve is fixedly connected with a second handle.
Further is: an outer box body hole is formed in the top plate of the outer box body, and a push plate hole is formed in the push plate.
When the soil sampling device is applied, the cutting edge of the outer box body is downward at a proper position on the ground, the outer box body is pressed into soil through the external sleeve to apply force until the soil sampling box is full of soil, at the moment, the soil sampling box moves to a dead point relative to the top plate of the outer box body, and the dead point refers to that the soil sampling box does not generate relative movement relative to the top plate of the outer box body. Then, the first pull wire and the second pull wire are pulled to enable the blade and the plastic film to horizontally move along the grooves on the inner wall of the outer box body; under the action of the first pull wire and the second pull wire, the blade is driven to cut the soil body. Simultaneously, the first pull wire and the second pull wire drive the plastic film, and the soil body in the soil taking box is separated from the external soil body through the plastic film. The outer box body is lifted upwards, so that the soil taking in the first step is completed.
After the first soil sampling is completed, the plastic film can be manually cut along the peripheral direction of the soil sampling box through the second blade, and then the flat plate is pushed by pushing the push rod, so that the soil sampling can be performed by pushing the soil sampling box out of the external box body, and the whole soil sampling process is completed.
The beneficial effects of the invention are as follows: the soil bodies in the box and outside the box are separated in the mode of blade cutting and plastic film sealing, so that the change of moisture in the soil body caused by suction is avoided, the disturbance to the soil body is avoided, and the soil sampling effect can be effectively improved. The device is easy to insert the soil sampler into soft soil and can avoid disturbance to weak soil in the soil sampling process. Meanwhile, the method ensures that the water in the soil body is not influenced in the soil sampling process; the soil sampling device is simple and is easy to operate by a single person.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is a schematic view of the connection of the blade, plastic film and pull wire in the present invention;
FIG. 4 is a schematic view of the soil sampling box according to the present invention;
FIG. 5 is a schematic view of the push plate and push rod of the present invention;
the marks in the figure: 1-first handle, 2-push rod, 3-second handle, 4-outside sleeve, 5-first acting as go-between, 6-second acting as go-between, 7-outside box body hole, 8-horizontal pole, 9-location mark, 10-outside box body, 11-first stopper, 12-second stopper, 13-soil sampling box, 14-push pedal, 15-push pedal hole, 16-blade, 17-blade, 18-plastic film.
Detailed Description
The invention will be further described with reference to the accompanying drawings and examples.
As shown in fig. 1 to 5, the invention comprises an outer box body 10 with an opening structure at the bottom end, wherein the outer box body 10 is rectangular, a cutting edge 16 is arranged on the bottom end surface of the outer box body 10 along the circumferential direction of the outer box body, an outer sleeve 4 is fixedly connected with the upper surface of a top plate of the outer box body 10, the outer sleeve 4 is perpendicular to the top plate of the outer box body 10, a soil taking box 13 is sleeved in the outer box body 10, the outer wall of the soil taking box 13 is in sliding fit with the inner wall of the outer box body 10, the upper end and the lower end of the soil taking box 13 are both in an opening structure, and a push plate 14 capable of closing the opening at the top end is arranged on the top end surface of the soil taking box 13; the push plate 14 is provided with a push rod 2 on one surface facing the top plate of the outer box body 10, the push rod 2 passes through the top plate of the outer box body 10 and is sleeved on the inner wall of the outer sleeve 4, and the top end of the push rod 2 extends out of the outer sleeve 4;
when the soil sampling box 13 moves to a dead point relative to the top plate of the outer box body 10, a slot is formed in the inner wall of the outer box body 10 at the position of the bottom end surface of the soil sampling box 13, the slot is horizontally arranged along the circumferential direction of the outer box body 10, a blade 17 is arranged in the slot of one side wall, the blade 17 is parallel to the side wall of the outer box body 10, the cutting direction of the blade 17 is horizontally arranged towards the inside of the outer box body 10, one end of the blade 17 is fixedly connected with a first stay wire 5, the other end of the blade 17 is fixedly connected with a second stay wire 6, and the first stay wire 5 and the second stay wire 6 are arranged in parallel in the side wall of the outer box body 10 and are perpendicular to the length direction of the blade 17; a plastic film 18 is fixedly arranged between the first pull wire 5 and the second pull wire 6 on one side of the back of the blade 17, a cavity structure for accommodating the plastic film 18 is arranged in the side wall of the outer box body 10, and the size of the unfolded plastic film 18 can completely close the bottom end opening of the soil sampling box 13; on the blade edge side of the blade 17, the first and second wires 5, 6 are arranged along the slot of the outer case 10 and pass through the inside of the side wall of the outer case 10 at the end of the slot until protruding from the top plate of the outer case 10; by pulling the first and second pull wires 5, 6, the blade 17 and the plastic film 18 can be moved horizontally along the slit on the inner wall of the outer case 10.
During assembly, the push plate 14 is placed into the outer box 10, and the push plate 14 can be just placed. Then, the lubricant can be smeared on the outer side of the soil sampling box 13, the soil sampling box 13 is placed into the outer box body 10, the outer side of the soil sampling box 13 is attached to the outer box body 10, and the soil sampling box 13 needs to have a certain thickness so as to ensure that the soil sampling box 13 is taken out from the outer box body 10 through the push plate 14.
In practice, the cutting edge 16 of the outer box 10 is downward at a proper position on the ground, and the outer box 10 is pressed into the soil by the application of force of the outer sleeve 4 until the soil taking box 13 is full of the soil, at this time, the soil taking box 13 moves to a dead point relative to the top plate of the outer box 10, and the dead point refers to that the soil taking box 13 does not generate relative movement relative to the top plate of the outer box 10 any more. Then, by pulling the first pull wire 5 and the second pull wire 6, the blade 17 and the plastic film 18 horizontally move along the grooves on the inner wall of the outer box body 10; under the action of the first pull wire 5 and the second pull wire 6, the blade 17 is driven to cut the soil body. Simultaneously, the first pull wire 5 and the second pull wire 6 drive the plastic film 18, and the soil body in the soil taking box 13 is separated from the external soil body through the plastic film 18. The outer casing 10 is lifted upward, thereby completing the first soil sampling.
After the first soil sampling is completed, the plastic film 18 can be manually cut along the circumferential direction of the soil sampling box 13 by the second blade, and then the flat plate 14 is pushed by pushing the push rod 2, so that the soil sampling can be performed by pushing the soil sampling box 13 out of the outer box body 10, and the whole soil sampling process is completed.
In order to facilitate the synchronous pulling of the first pull wire 5 and the second pull wire 6, the first pull wire 5 and the second pull wire 6 are fixedly connected through the cross rod 8 after extending out from the top plate of the outer box body 10 at one side of the cutting edge of the blade 17. The first pull wire 5 and the second pull wire 6 can be made of steel wires.
On the back side of the blade 17, the first pull wire 5 and the second pull wire 6 pass through the inside of the side wall of the outer case 10 until they protrude from the top plate of the outer case 10. This facilitates the loading of the plastic film 18 and, when the first soil sampling is completed, the plastic film 18 can be closely attached to the bottom of the sampling box 13 by pulling both ends of the first string 5 and both ends of the second string 6.
In order to prevent the first pull wire 5 and the second pull wire 6 from being pulled out of the outer box 10, after the first pull wire 5 and the second pull wire 6 extend out of the top plate of the outer box 10 at one side of the back of the blade 17, the end part of the first pull wire 5 is connected with a first limiting block 11, and the end part of the second pull wire 6 is connected with a second limiting block 12. The first limiting block 11 and the second limiting block 12 can be cylindrical iron blocks.
For convenient positioning, when the soil sampling box 13 moves to a dead point position relative to the top plate of the outer box body 10, the outer wall of the outer box body 10 is provided with a positioning mark 9 at the top end corresponding position of the soil sampling box 13. The outer casing 10 is pressed into the soil and when the positioning mark 9 on the outside of the outer casing 10 is reached, the application of force is stopped, indicating that the interior of the soil taking box 13 is full.
In order to conveniently and stably apply the thrust, the bottom end of the push rod 2 is fixedly connected with the push plate 14 vertically.
For convenient operation, the first handle 1 is fixedly connected with one end of the push rod 2 extending out of the outer sleeve 4. The top end of the outer sleeve 4 is fixedly connected with a second handle 3.
The top plate of the outer box body 10 is provided with an outer box body hole 7, and the push plate 14 is provided with a push plate hole 15. By arranging the outer box body holes 7 and the push plate holes 15, the air in the box can be easily discharged at the beginning and the water on the upper part of the soil body can be easily discharged.
Claims (5)
1. Geotome, its characterized in that: the soil sampling device comprises an outer box body (10) with an opening structure at the bottom end, wherein the outer box body (10) is rectangular, a cutting edge (16) is arranged on the bottom end surface of the outer box body (10) along the circumferential direction of the outer box body, an outer sleeve (4) is fixedly connected to the upper surface of a top plate of the outer box body (10), the outer sleeve (4) is perpendicular to the top plate of the outer box body (10), a soil sampling box (13) is sleeved in the outer box body (10), the outer wall of the soil sampling box (13) is in sliding fit with the inner wall of the outer box body (10), the upper end and the lower end of the soil sampling box (13) are of an opening structure, and a push plate (14) capable of sealing the opening at the top end is arranged on the top end surface of the soil sampling box (13); one surface of the push plate (14) facing the top plate of the outer box body (10) is provided with a push rod (2), the push rod (2) passes through the top plate of the outer box body (10) and is sleeved on the inner wall of the outer sleeve (4), and the top end of the push rod (2) extends out of the outer sleeve (4);
when the soil taking box (13) moves to a dead point relative to a top plate of the outer box body (10), a slot is formed in the inner wall of the outer box body (10) at the bottom end surface position of the soil taking box (13), the slot is horizontally arranged along the circumferential direction of the outer box body (10), a blade (17) is arranged in the slot of one side wall, the blade (17) is parallel to the side wall of the outer box body (10), the cutting direction of the blade (17) is horizontally arranged towards the inside of the outer box body (10), one end of the blade (17) is fixedly connected with a first stay wire (5), the other end of the blade (17) is fixedly connected with a second stay wire (6), and the first stay wire (5) and the second stay wire (6) are arranged in parallel in the side wall of the outer box body (10) and are perpendicular to the length direction of the blade (17); a plastic film (18) is fixedly arranged between the first pull wire (5) and the second pull wire (6) on one side of the back of the blade (17), a cavity structure for accommodating the plastic film (18) is arranged in the side wall of the outer box body (10), and the bottom end opening of the soil sampling box (13) can be completely closed by the specification and the size of the plastic film (18) after being unfolded; on the blade edge side of the blade (17), the first stay wire (5) and the second stay wire (6) are arranged along the slot of the outer box body (10) and pass through the side wall of the outer box body (10) at the end of the slot until extending out from the top plate of the outer box body (10); by pulling the first pull wire (5) and the second pull wire (6), the blade (17) and the plastic film (18) can horizontally move along the grooves on the inner wall of the outer box body (10); the first stay wire (5) and the second stay wire (6) are fixedly connected through a cross rod (8) after extending out from the top plate of the external box body (10) at one side of the blade (17);
the first stay wire (5) and the second stay wire (6) penetrate through the side wall of the outer box body (10) at one side of the knife back of the knife blade (17) until the first stay wire and the second stay wire extend out of the top plate of the outer box body (10);
after the first stay wire (5) and the second stay wire (6) extend out of the top plate of the external box body (10) at one side of the knife back of the knife blade (17), the end part of the first stay wire (5) is connected with a first limiting block (11), and the end part of the second stay wire (6) is connected with a second limiting block (12);
when the soil sampling box (13) moves to a dead point relative to the top plate of the outer box body (10), the outer wall of the outer box body (10) is provided with a positioning mark (9) at the position corresponding to the top end surface of the soil sampling box (13).
2. The geotome of claim 1, wherein: the bottom end of the push rod (2) is vertically and fixedly connected with the push plate (14).
3. The geotome of claim 1, wherein: one end of the push rod (2) extending out of the outer sleeve (4) is fixedly connected with a first handle (1).
4. The geotome of claim 1, wherein: the top end of the outer sleeve (4) is fixedly connected with a second handle (3).
5. The geotome of claim 1, wherein: an outer box body hole (7) is formed in the top plate of the outer box body (10), and a push plate hole (15) is formed in the push plate (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810834253.7A CN108709767B (en) | 2018-07-26 | 2018-07-26 | Soil sampler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810834253.7A CN108709767B (en) | 2018-07-26 | 2018-07-26 | Soil sampler |
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| Publication Number | Publication Date |
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| CN108709767A CN108709767A (en) | 2018-10-26 |
| CN108709767B true CN108709767B (en) | 2023-12-01 |
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| CN201810834253.7A Active CN108709767B (en) | 2018-07-26 | 2018-07-26 | Soil sampler |
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| CN114323765A (en) * | 2022-01-11 | 2022-04-12 | 北京中兴恒工程咨询有限公司 | Soil analysis sampling device |
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