CN105571889A - Piston type fixed-depth soil core sampling device and use method thereof - Google Patents
Piston type fixed-depth soil core sampling device and use method thereof Download PDFInfo
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- CN105571889A CN105571889A CN201510939909.8A CN201510939909A CN105571889A CN 105571889 A CN105571889 A CN 105571889A CN 201510939909 A CN201510939909 A CN 201510939909A CN 105571889 A CN105571889 A CN 105571889A
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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
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
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Abstract
The invention discloses a piston type fixed-depth soil core sampling device and a use method thereof, relates to a soil core sampling device and a use method thereof, and aims to solve the problems that a conventional soil sampling device difficultly excavates and takes out fixed-length undisturbed soil from a drill body and the sampling error is outstanding. The piston type fixed-depth soil core sampling device comprises a drilling shank, a push rod clamping slot, a piston push rod, a piston, a drilling bit and drilling bit saw teeth. The use method comprises the following steps: 1, clamping a clamping shank of the piston push rod to the push rod clamping slot correspondingly according to a sampling depth; 2, vertically placing the piston type fixed-depth soil core sampling device at a point position to be sampled; 3, starting the drilling bit saw teeth, and plugging the piston type fixed-depth soil core sampling device into the soil at the point to be sampled to reach the sampling depth; and 4, taking out the piston type fixed-depth soil core sampling device, putting on the ground flatly, and cutting off layer by layer with a tool, thus completing fixed-depth soil core sampling. The piston type fixed-depth soil core sampling device is mainly used for collecting soil.
Description
Technical field
The present invention relates to a kind of core sampler and using method thereof.
Background technology
One of environment and the important element task of ecological study scientific worker are engaged in soil sample, and the soil or the sediment that gather different depth accurately, are quantitatively directly connected to the precision of correlative study and the reliability of data.The auger body length of general soil sampler is fixed, thus can only the core of accurate acquisition equal length, is difficult to as required, gathers the core of different depth with a soil sampling apparatus.In addition, after core enters sampling drill body, due to the existence of negative pressure in drill body and core and drill body inwall friction force, therefore core is difficult to take out smoothly from drill body.Draw out by force and often cause the extruding to core even damaged, seriously reduce sampling quality.As can be seen here, conventional soil sampler is difficult to excavate and from drill body, takes out the original-state soil of fixed length, and sampling error is remarkable.
Summary of the invention
The present invention seeks to solve conventional soil sampler to be difficult to excavate and the original-state soil taking out fixed length from drill body, and the significant problem of sampling error, and a kind of piston type depthkeeping core sampler and using method thereof are provided.
A kind of piston type depthkeeping core sampler comprises drillstock, push rod draw-in groove, piston push rod, piston, drill bit and drill bit sawtooth, described drill bit is cylindrical stainless steel cylinder, described cylindrical stainless steel cylinder is made up of top cover and barrel, described top cover and barrel weld together, and described top cover is provided with venthole and tie rod holes; Described piston push rod is made up of card handle and connecting rod, and described connecting rod and card handle weld together, and connecting rod links together through the tie rod holes on top cover and piston; Described drillstock by drilling rod and hold up handle to form, described drilling rod and hold up handle to weld together, described drilling rod is tubular, and drilling rod and connecting rod are set in together; Described top cover and the drilling rod of drillstock link together, the drilling rod of drillstock is provided with push rod draw-in groove, described push rod draw-in groove is made up of draw-in groove and slideway, along slideway direction push card handle, piston push rod is moved up and down, rotating piston push rod makes card handle and draw-in groove be connected together, and is provided with drill bit sawtooth bottom the barrel of cylindrical stainless steel cylinder.
A using method for piston type depthkeeping core sampler, specifically completes according to the following steps:
One, set sampling depth, according to sampling depth, corresponding with push rod draw-in groove for the card handle of piston push rod draw-in groove is connected together;
Two, by the drill bit of piston type depthkeeping core sampler down, to be sampled some position is vertically placed in;
Three, start drill bit sawtooth, rotating clockwise drill bit sawtooth to cut off grass roots incision soil to setting sampling depth, utilizing drillstock to insert in the soil of point to be sampled, to reaching sampling depth by piston type depthkeeping core sampler;
Four, whole drill bit is vertically extracted after rotating counterclockwise drill bit, take out piston type depthkeeping core sampler and lie against earth's surface, piston push rod is utilized to make piston directly core be released drill bit along slideway direction push card handle, or utilize piston push rod by card push card handle, piston to be released drill bit along slideway direction, according to draw-in groove, obtain complete core sample, utilize cutter successively to cut off, obtain the core sample that thickness is 1cm, namely complete the sampling of depthkeeping core.
Advantage of the present invention: the piston type depthkeeping core sampler of the present invention's design adopt piston (piston push rod and piston) and the push rod draw-in groove of band push rod with the use of mode, sampling depth is accurate, core is easy to take out, section is complete, easy to carry, and the high and quality of soil extracting efficiency can ensure.
Accompanying drawing explanation
Fig. 1 is piston type depthkeeping core sampler front view;
Fig. 2 is piston type depthkeeping core sampler rear view;
Fig. 3 is piston type depthkeeping core sampler left view;
Fig. 4 is piston type depthkeeping core sampler right view;
Fig. 5 is piston type depthkeeping core sampler vertical view;
Fig. 6 is piston type depthkeeping core sampler upward view;
Fig. 7 is piston type depthkeeping core sampler three-dimensional structure schematic diagram;
Fig. 8 is piston type depthkeeping core sampler volumetric body structural representation.
Embodiment
Embodiment one: in conjunction with Fig. 1 and 2, present embodiment is a kind of piston type depthkeeping core sampler, it comprises drillstock 1, push rod draw-in groove 2, piston push rod 3, piston 4, drill bit 5 and drill bit sawtooth 6, described drill bit 5 is cylindrical stainless steel cylinder, described cylindrical stainless steel cylinder is made up of top cover 5-2 and barrel 5-1, described top cover 5-2 and barrel 5-1 welds together, and described top cover 5-2 is provided with venthole 5-2-1 and tie rod holes 5-2-2; Described piston push rod 3 is made up of card handle 3-1 and connecting rod 3-2, and described connecting rod 3-2 and card handle 3-1 welds together, and connecting rod 3-2 links together through the tie rod holes 5-2-2 on top cover 5-2 and piston 4; Described drillstock 1 is by drilling rod 1-2 and hold up handle 1-1 to form, described drilling rod 1-2 and hold up handle 1-1 to weld together, and described drilling rod 1-2 is tubular, and drilling rod 1-2 and connecting rod 3-2 is set in together; Described top cover 5-2 and the drilling rod 1-2 of drillstock 1 links together, the drilling rod 1-2 of drillstock 1 is provided with push rod draw-in groove 2, described push rod draw-in groove 2 is made up of draw-in groove 2-1 and slideway 2-2, along slideway 2-2 direction push card handle 3-1, piston push rod 3 is moved up and down, rotating piston push rod 3 makes card handle 3-1 and draw-in groove 2-1 be connected together, bottom the barrel 5-1 of cylindrical stainless steel cylinder, be provided with drill bit sawtooth 6.
Fig. 1 is piston type depthkeeping core sampler front view; In figure, 1 is drillstock, and 2 is push rod draw-in groove, and 3 is piston push rod, and 4 is piston, and 5 is drill bit, and 6 is drill bit sawtooth, 1-1 is drillstock, and 1-2 is drilling rod, and 2-1 is draw-in groove, and 2-2 is slideway, and 3-1 is card handle, 3-2 is connecting rod, and 5-1 is barrel, and 5-2 is top cover, and 5-2-1 is venthole, and 5-2-2 is tie rod holes.
Fig. 2 is piston type depthkeeping core sampler rear view; In figure, 1 is drillstock, and 2 is push rod draw-in groove, and 3 is piston push rod, and 4 is piston, and 5 is drill bit, and 6 is drill bit sawtooth, 1-1 is drillstock, and 1-2 is drilling rod, and 2-1 is draw-in groove, and 2-2 is slideway, and 3-1 is card handle, 3-2 is connecting rod, and 5-1 is barrel, and 5-2 is top cover, and 5-2-1 is venthole, and 5-2-2 is tie rod holes.
Fig. 3 is piston type depthkeeping core sampler left view; In figure, 1 is drillstock, and 2 is push rod draw-in groove, and 3 is piston push rod, and 4 is piston, and 5 is drill bit, 6 is drill bit sawtooth, and 1-1 is drillstock, and 1-2 is drilling rod, and 2-1 is draw-in groove, and 3-1 is card handle, 3-2 is connecting rod, and 5-1 is barrel, and 5-2 is top cover, and 5-2-1 is venthole, and 5-2-2 is tie rod holes.
Fig. 4 is piston type depthkeeping core sampler right view; In figure, 1 is drillstock, and 2 is push rod draw-in groove, and 3 is piston push rod, and 4 is piston, and 5 is drill bit, 6 is drill bit sawtooth, and 1-1 is drillstock, and 1-2 is drilling rod, and 2-1 is draw-in groove, and 3-1 is card handle, 3-2 is connecting rod, and 5-1 is barrel, and 5-2 is top cover, and 5-2-1 is venthole, and 5-2-2 is tie rod holes.
Fig. 5 is piston type depthkeeping core sampler vertical view; 6 is drill bit sawtooth, and 1-1 is drillstock, and 3-1 is card handle, and 5-1 is barrel, and 5-2-1 is venthole.
Fig. 6 is piston type depthkeeping core sampler upward view; 6 is drill bit sawtooth, and 1-1 is drillstock, and 3-1 is card handle, and 5-1 is barrel, and 5-2-1 is venthole.
Fig. 7 is piston type depthkeeping core sampler three-dimensional structure schematic diagram; In figure, 1 is drillstock, and 2 is push rod draw-in groove, and 3 is piston push rod, and 4 is piston, and 5 is drill bit, 6 is drill bit sawtooth, and 1-1 is drillstock, and 1-2 is drilling rod, and 2-1 is draw-in groove, and 3-1 is card handle, 3-2 is connecting rod, and 5-1 is barrel, and 5-2 is top cover, and 5-2-1 is venthole, and 5-2-2 is tie rod holes.
Fig. 8 is piston type depthkeeping core sampler volumetric body structural representation.
Embodiment two: in conjunction with Fig. 1 and 2, the difference of present embodiment and embodiment one is: described drill bit 5 is cylindrical stainless steel cylinder, and the cavity diameter of cylindrical stainless steel cylinder is 50mm ~ 200mm, the length of cylindrical stainless steel cylinder is 100mm ~ 1000mm.Other are identical with embodiment one.
Embodiment three: in conjunction with Fig. 1 and 2, one of present embodiment and embodiment one or two difference is: described push rod draw-in groove 2 is engraved on the drilling rod 1-2 of drillstock 1.Other are identical with embodiment one or two.
Embodiment four: in conjunction with Fig. 1 and 2, one of present embodiment and embodiment one to three difference is: described piston 4 is stainless steel disk, and the size of described stainless steel disk and the cavity diameter of cylindrical stainless steel cylinder match.Other are identical with embodiment one to three.
Embodiment five: in conjunction with Fig. 1 and 2, present embodiment with one of embodiment one to four difference is: the card handle 3-1 of described piston push rod 3 is meshed with the draw-in groove 2-1 of push rod draw-in groove 2.Other are identical with embodiment one to four.
Embodiment six: in conjunction with Fig. 1 and 2, one of present embodiment and embodiment one to five difference is: described drill bit sawtooth 6 is the serrate of tiltedly arrangement counterclockwise, put the first edge on a knife or a pair of scissors, described drill bit sawtooth 6 together with the barrel 5-1 bottom welding of cylindrical stainless steel cylinder, or is directly processed to form saw cuts as drill bit sawtooth 6 using bottom the barrel 5-1 of cylindrical stainless steel cylinder.Other are identical with embodiment one to five.
Embodiment seven: in conjunction with Fig. 1 and 2, a kind of using method of piston type depthkeeping core sampler, specifically completes according to the following steps:
One, set sampling depth, according to sampling depth, the card handle 3-1 draw-in groove 2-1 corresponding with push rod draw-in groove 2 of piston push rod 3 is connected together;
Two, by the drill bit 5 of piston type depthkeeping core sampler down, to be sampled some position is vertically placed in;
Three, start drill bit sawtooth 6, rotating clockwise drill bit sawtooth 6 to cut off grass roots incision soil to setting sampling depth, utilizing drillstock 1 to insert in the soil of point to be sampled, to reaching sampling depth by piston type depthkeeping core sampler;
Four, whole drill bit 5 is vertically extracted after rotating counterclockwise drill bit 5, take out piston type depthkeeping core sampler and lie against earth's surface, piston push rod 3 is utilized to make piston 4 directly core be released drill bit 5 along slideway 2-2 direction push card handle 3-1, or utilize piston push rod 3 by card push card handle 3-1, piston 4 to be released drill bit 5 along slideway 2-2 direction, according to draw-in groove 2-1, obtain complete core sample, utilize cutter successively to cut off, obtain the core sample that thickness is 1cm, namely complete the sampling of depthkeeping core.
Adopt following verification experimental verification effect of the present invention
Embodiment 1: in conjunction with Fig. 1 and 2, a kind of piston type depthkeeping core sampler, it comprises drillstock 1, push rod draw-in groove 2, piston push rod 3, piston 4, drill bit 5 and drill bit sawtooth 6, described drill bit 5 is cylindrical stainless steel cylinder, described cylindrical stainless steel cylinder is made up of top cover 5-2 and barrel 5-1, described top cover 5-2 and barrel 5-1 welds together, and described top cover 5-2 is provided with venthole 5-2-1 and tie rod holes 5-2-2; Described piston push rod 3 is made up of card handle 3-1 and connecting rod 3-2, and described connecting rod 3-2 and card handle 3-1 welds together, and connecting rod 3-2 links together through the tie rod holes 5-2-2 on top cover 5-2 and piston 4; Described drillstock 1 is by drilling rod 1-2 and hold up handle 1-1 to form, described drilling rod 1-2 and hold up handle 1-1 to weld together, and described drilling rod 1-2 is tubular, and drilling rod 1-2 and connecting rod 3-2 is set in together; Described top cover 5-2 and the drilling rod 1-2 of drillstock 1 links together, the drilling rod 1-2 of drillstock 1 is provided with push rod draw-in groove 2, described push rod draw-in groove 2 is made up of draw-in groove 2-1 and slideway 2-2, along slideway 2-2 direction push card handle 3-1, piston push rod 3 is moved up and down, rotating piston push rod 3 makes card handle 3-1 and draw-in groove 2-1 be connected together, bottom the barrel 5-1 of cylindrical stainless steel cylinder, be provided with drill bit sawtooth 6.
Drill bit 5 described in the present embodiment is cylindrical stainless steel cylinder, and the cavity diameter of cylindrical stainless steel cylinder is 100mm, and the length of cylindrical stainless steel cylinder is 800mm.
Push rod draw-in groove 2 described in the present embodiment is engraved on the drilling rod 1-2 of drillstock 1.
Piston 4 described in the present embodiment is stainless steel disk, and the size of described stainless steel disk and the cavity diameter of cylindrical stainless steel cylinder match.
The card handle 3-1 of the piston push rod 3 described in the present embodiment is meshed with the draw-in groove 2-1 of push rod draw-in groove 2.
Drill bit sawtooth 6 described in the present embodiment is the serrate of tiltedly arrangement counterclockwise, puts the first edge on a knife or a pair of scissors, is directly processed to form saw cuts as drill bit sawtooth 6 using bottom the barrel 5-1 of cylindrical stainless steel cylinder.
Embodiment 2: in conjunction with Fig. 1 and 2, a kind of using method of piston type depthkeeping core sampler, specifically completes according to the following steps:
One, setting sampling depth is 600mm, is connected together by the card handle 3-1 draw-in groove 2-1 corresponding with push rod draw-in groove 2 of piston push rod 3 according to sampling depth;
Two, by the drill bit 5 of piston type depthkeeping core sampler down, to be sampled some position is vertically placed in;
Three, start drill bit sawtooth 6, rotating clockwise drill bit sawtooth 6 to cut off grass roots incision soil to setting sampling depth, utilizing drillstock 1 to insert in the soil of point to be sampled, to reaching sampling depth by piston type depthkeeping core sampler;
Four, whole drill bit 5 is vertically extracted after rotating counterclockwise drill bit 5, take out piston type depthkeeping core sampler and lie against earth's surface, piston push rod 3 is utilized to make piston 4 directly core be released drill bit 5 along slideway 2-2 direction push card handle 3-1, or utilize piston push rod 3 by card push card handle 3-1, piston 4 to be released drill bit 5 along slideway 2-2 direction, according to draw-in groove 2-1, obtain complete core sample, utilize cutter successively to cut off, obtain the core sample that thickness is 1cm, namely complete the sampling of depthkeeping core.
It is 600mm that the present embodiment step 4 obtains complete core height of specimen, after utilizing cutter successively to cut off, obtains the core sample that 60 parts of thickness are 1cm, therefore utilizes piston type depthkeeping core sampler to realize sampling depth accurate.
Claims (7)
1. a piston type depthkeeping core sampler, it is characterized in that it comprises drillstock (1), push rod draw-in groove (2), piston push rod (3), piston (4), drill bit (5) and drill bit sawtooth (6), described drill bit (5) is cylindrical stainless steel cylinder, described cylindrical stainless steel cylinder is made up of top cover (5-2) and barrel (5-1), described top cover (5-2) and barrel (5-1) weld together, and described top cover (5-2) is provided with venthole (5-2-1) and tie rod holes (5-2-2); Described piston push rod (3) is made up of card handle (3-1) and connecting rod (3-2), described connecting rod (3-2) and card handle (3-1) weld together, and connecting rod (3-2) links together through the tie rod holes (5-2-2) on top cover (5-2) and piston (4); Described drillstock (1) is by drilling rod (1-2) and hold up handle (1-1) to form, described drilling rod (1-2) and hold up handle (1-1) to weld together, described drilling rod (1-2) is in tubular, and drilling rod (1-2) and connecting rod (3-2) are set in together; Described top cover (5-2) links together with the drilling rod (1-2) of drillstock (1), the drilling rod (1-2) of drillstock (1) is provided with push rod draw-in groove (2), described push rod draw-in groove (2) is made up of draw-in groove (2-1) and slideway (2-2), along slideway (2-2) direction push card handle (3-1), piston push rod (3) is moved up and down, rotating piston push rod (3) makes card handle (3-1) and draw-in groove (2-1) be connected together, and is provided with drill bit sawtooth (6) in barrel (5-1) bottom of cylindrical stainless steel cylinder.
2. a kind of piston type depthkeeping core sampler according to claim 1, it is characterized in that described drill bit (5) is cylindrical stainless steel cylinder, and the cavity diameter of cylindrical stainless steel cylinder is 50mm ~ 200mm, the length of cylindrical stainless steel cylinder is 100mm ~ 1000mm.
3. a kind of piston type depthkeeping core sampler according to claim 1, is characterized in that described push rod draw-in groove (2) is engraved on the drilling rod (1-2) of drillstock (1).
4. a kind of piston type depthkeeping core sampler according to claim 1, it is characterized in that described piston (4) is stainless steel disk, and the size of described stainless steel disk and the cavity diameter of cylindrical stainless steel cylinder matches.
5. a kind of piston type depthkeeping core sampler according to claim 1, is characterized in that the card handle (3-1) of described piston push rod (3) is meshed with the draw-in groove (2-1) of push rod draw-in groove (2).
6. a kind of piston type depthkeeping core sampler according to claim 1, it is characterized in that described drill bit sawtooth (6) is the serrate of tiltedly arrangement counterclockwise, put the first edge on a knife or a pair of scissors, the barrel (5-1) of cylindrical stainless steel cylinder bottom together with barrel (5-1) bottom welding of cylindrical stainless steel cylinder, or is directly processed to form saw cuts as drill bit sawtooth (6) by described drill bit sawtooth (6).
7. the using method of a kind of piston type depthkeeping core sampler as claimed in claim 1, is characterized in that a kind of using method of piston type depthkeeping core sampler completes according to the following steps:
One, set sampling depth, according to sampling depth, the card handle (3-1) of piston push rod (3) is connected together with push rod draw-in groove (2) corresponding draw-in groove (2-1);
Two, by the drill bit (5) of piston type depthkeeping core sampler down, to be sampled some position is vertically placed in;
Three, drill bit sawtooth (6) is started, rotate clockwise drill bit sawtooth (6) to cut off grass roots incision soil to setting sampling depth, drillstock (1) is utilized to insert in the soil of point to be sampled, to reaching sampling depth by piston type depthkeeping core sampler;
Four, rotate counterclockwise drill bit (5) and vertically extract whole drill bit (5) afterwards, take out piston type depthkeeping core sampler and lie against earth's surface, piston push rod (3) is utilized to make piston (4) directly core be released drill bit (5) along slideway (2-2) direction push card handle (3-1), or utilize piston push rod (3) along slideway (2-2) direction, by card push card handle (3-1), piston (4) is released drill bit (5) according to draw-in groove (2-1), obtain complete core sample, cutter is utilized successively to cut off, obtain the core sample that thickness is 1cm, namely the sampling of depthkeeping core is completed.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105890921A (en) * | 2016-05-25 | 2016-08-24 | 中国地质大学（武汉） | Soil sampling device |
| CN106053182A (en) * | 2016-08-09 | 2016-10-26 | 河海大学常州校区 | Preparation device and preparation method of clay sample |
| CN106442007A (en) * | 2016-10-14 | 2017-02-22 | 杭州序列网络科技有限公司 | Excrement sampling device |
| CN106501023A (en) * | 2016-12-08 | 2017-03-15 | 广西壮族自治区农业科学院农业资源与环境研究所 | Fermenting bed padding sample collecting and bedding and padding temperature measuring wireless transmitting system |
| CN108012620A (en) * | 2017-12-27 | 2018-05-11 | 郑州国知网络技术有限公司 | Soil sampler is punched in a kind of plantation easy to flexibly move |
| CN110286024A (en) * | 2019-07-10 | 2019-09-27 | 中国有色金属工业昆明勘察设计研究院有限公司 | Freezing method produces the method for being saturated soft sand undisturbed |
| CN110895212A (en) * | 2019-11-04 | 2020-03-20 | 河北省农林科学院农业资源环境研究所 | Novel soil sampler |
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| CN113389493A (en) * | 2021-07-12 | 2021-09-14 | 中国一冶集团有限公司 | Multifunctional drill bit device of drilling and core-drilling machine and construction method |
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| CN113933100A (en) * | 2021-11-04 | 2022-01-14 | 吉林农业大学 | Different depth soil sample synchronous acquisition device for forest planting soil analysis |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106501023A (en) * | 2016-12-08 | 2017-03-15 | 广西壮族自治区农业科学院农业资源与环境研究所 | Fermenting bed padding sample collecting and bedding and padding temperature measuring wireless transmitting system |
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| CN108012620A (en) * | 2017-12-27 | 2018-05-11 | 郑州国知网络技术有限公司 | Soil sampler is punched in a kind of plantation easy to flexibly move |
| CN110286024A (en) * | 2019-07-10 | 2019-09-27 | 中国有色金属工业昆明勘察设计研究院有限公司 | Freezing method produces the method for being saturated soft sand undisturbed |
| CN110895212A (en) * | 2019-11-04 | 2020-03-20 | 河北省农林科学院农业资源环境研究所 | Novel soil sampler |
| CN111366404A (en) * | 2020-04-08 | 2020-07-03 | 河北工程大学 | Geological content drilling type sampling device for geological mapping exploitation |
| CN113389493A (en) * | 2021-07-12 | 2021-09-14 | 中国一冶集团有限公司 | Multifunctional drill bit device of drilling and core-drilling machine and construction method |
| CN113899880A (en) * | 2021-10-15 | 2022-01-07 | 滨州学院 | Coastal wetland carbon reserve measuring device and testing method |
| CN113899880B (en) * | 2021-10-15 | 2024-02-23 | 滨州学院 | Coastal wetland carbon reserve measuring device and method |
| CN113933100A (en) * | 2021-11-04 | 2022-01-14 | 吉林农业大学 | Different depth soil sample synchronous acquisition device for forest planting soil analysis |
| CN117470576A (en) * | 2023-10-22 | 2024-01-30 | 孟圪针 | Engineering supervision sampling system |
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