CN108827699B - Sampling method for obtaining large-size cylindrical undisturbed soil - Google Patents

Sampling method for obtaining large-size cylindrical undisturbed soil Download PDF

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Publication number
CN108827699B
CN108827699B CN201811017736.4A CN201811017736A CN108827699B CN 108827699 B CN108827699 B CN 108827699B CN 201811017736 A CN201811017736 A CN 201811017736A CN 108827699 B CN108827699 B CN 108827699B
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soil
sampling
fixedly connected
sample
screw thread
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CN108827699A (en
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姚志华
苏立海
李婉
史保华
谭万鹏
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Air Force Engineering University of PLA
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Air Force Engineering University of PLA
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/02Devices for withdrawing samples
    • G01N1/04Devices for withdrawing samples in the solid state, e.g. by cutting
    • G01N1/08Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit

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  • 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 discloses a sampling method for obtaining large-size cylindrical undisturbed soil, which comprises the steps of digging downwards a soil table after a certain depth when a vertical sample is taken for the undisturbed sample, leaving a vertical plane, tightly attaching a sampling tube of sampling equipment to a steel ring, gradually removing soil at the port of the sampling tube downwards, covering the upper end of the sampling tube by a wood plate, lightly beating the wood plate by a rubber hammer, and removing redundant loess at the front end cutting edge of the sampling tube; the horizontal soil sample is leveled under the ground, a soil platform is reserved, the soil digging grooves are formed in the two sides of the soil platform, when the sampling pipe advances, the supporting rod is placed to advance along with the soil platform, when the elongation of the supporting rod is large, the lower part of the front semicircular steel ring is supported by the wood plate, the level of the sampling pipe is ensured, the sampling pipe advances, and the lower part of the steel ring is supported to advance along with the soil sampling pipe. The invention has the advantages that the soil body is not damaged during sampling, and the sampling effect is good.

Description

Sampling method for obtaining large-size cylindrical undisturbed soil
Technical Field
The invention belongs to the technical field of sampling equipment, and relates to a sampling method for obtaining large-size cylindrical undisturbed soil.
Background
Undisturbed soil, also commonly referred to as undisturbed soil, is a soil sample that retains natural moisture content and natural structure; the method is used for measuring indexes such as the volume weight, the natural pore ratio, the compression coefficient, the shear strength and the like of the soil; the method for taking out the soil usually adopts a pressing-in method, a hammering method and a rotary hammering method, and one of the main tasks of engineering geological drilling is to take a rock core or undisturbed soil sample in a rock soil layer; the natural structure of the sample should be maintained during the sample collection process, and if the natural structure of the sample is destroyed, the sample is called a "disturbance sample"; disturbance samples are slightly tolerated in engineering geological surveys and are voided unless otherwise indicated; the original sample with the natural structure comprises a core sample and a soil sample, the natural structure of the core sample is not easy to break, and the soil sample is easy to disturb.
When carrying out undisturbed soil sampling, sometimes not only need carry out vertical sample, also sometimes have to carry out horizontal sample, but general sampling equipment is used for vertical sample mostly, often the sample effect is unsatisfactory when carrying out horizontal sample, can cause the appearance of disturbance appearance, influences sampling quality.
Disclosure of Invention
The invention aims to provide a sampling method for obtaining large-size cylindrical undisturbed soil, which has the advantages that soil is not damaged during sampling, and the sampling effect is good.
According to the technical scheme, when a vertical sample is taken, a soil table is shoveled out after a certain depth is excavated downwards, a vertical plane is reserved, a sampling pipe of sampling equipment is clung to a steel ring, soil at the port of the sampling pipe is gradually removed downwards, the upper end of the sampling pipe is covered by a wood plate, a rubber hammer is used for lightly beating the wood plate, the cutting edge at the front end of the sampling pipe is used for removing redundant loess, so that the original soil and the pipe wall of the sampling pipe are tightly meshed, and side wall leakage in the test process is effectively prevented; the horizontal soil sample is leveled under the ground, the soil platform is reserved, the soil digging grooves are formed in the two sides of the soil platform, so that redundant loess is removed when the sampling pipe advances, the support rod is placed to advance along with the sampling pipe, when the support rod is placed to be large in elongation, the lower part of the front semicircular steel ring is supported by the wood plate, the level of the sampling pipe is ensured, the sampling pipe advances, the lower part of the steel ring is supported to advance along with the support rod, and the horizontal soil sample can be effectively ensured not to be broken in the sampling process by adopting the measures.
Further, sampling equipment includes the base, the top fixedly connected with base bracing piece of base, the top fixedly connected with of base bracing piece places the seat, place the top fixedly connected with of seat and place the bracing piece, through steel loop fixed connection between the two place bracing pieces, the back fixedly connected with motor of base, the output fixedly connected with first belt pulley of motor, the equal fixedly connected with connecting seat in the back of placing the bracing piece, the back grafting of connecting seat has the screw thread piece, the fixed surface of screw thread piece is connected with the second belt pulley, pass through drive belt transmission connection between first belt pulley and the second belt pulley, peg graft in one side of screw thread piece has the telescopic link, the screw thread end of telescopic link runs through the screw thread piece and extends to the outside of screw thread piece, the one end fixedly connected with extrusion piece of keeping away from the screw thread piece of telescopic link, the top overlap joint of steel loop has the sampling tube, the one end fixedly connected with cutting ring of telescopic link is kept away from to the sampling tube.
Drawings
FIG. 1 is a schematic top view of the structure of the present invention;
FIG. 2 is a block diagram of a base of the present invention;
FIG. 3 is a top view of a support pole structure according to the present invention;
FIG. 4 is a cross-sectional view of a thread block structure of the present invention;
FIG. 5 is a schematic view of a vertical specimen sampling site;
fig. 6 is a schematic view of a horizontal specimen sampling site.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
The soil sampling device used in the invention is shown in fig. 1 to 4, and comprises a base 1, a stabilizing block 16 is fixedly connected to the front surface of the base 1, a friction block 17 is fixedly connected to the front surface of the stabilizing block 16, a sampling tube 14 and a cutting ring 15 are made of glass materials, a base support rod 2 is fixedly connected to the top of the base 1, two rotating shaft seats 18 are fixedly connected to one side of the base support rod 2, a rotating shaft 19 is movably connected to one side of the rotating shaft seat 18 away from the base support rod 2, a movable wheel 20 is fixedly connected to one side of the rotating shaft 19 away from the rotating shaft seat 18, a user can conveniently move the device to a proper position through the arranged base 1 and the movable wheel 20, a switch 27 can be directly opened for use after the device is fixed, the device can transversely sample, a placing seat 3 is fixedly connected to the top of the base support rod 2, the top of the placing seat 3 is fixedly connected with two placing support rods 4, the two sides of the placing support rods 4 are fixedly connected with connecting pieces 23, the top of each connecting piece 23 is lapped with a sampling fixing sleeve 24, the top of each sampling fixing sleeve 24 is spliced with a fixing bolt 25, the front of each connecting seat 8 is provided with a thread fixing groove matched with the thread of each fixing bolt 25, the position of each sampling tube 14 is limited through the arrangement of the corresponding sampling fixing sleeve 24 and each connecting piece 23, the sampling tubes 14 are prevented from moving out of the device, the sampling fixing sleeves 24 are lapped with the sampling tubes 14, the top of the base 1 is fixedly connected with a storage battery 26, the top of the placing seat 3 is fixedly provided with a switch 27, the stability of the device is improved through the gravity of the arranged storage battery 26, when the device can be transversely or vertically pressed down through the storage battery 26, the device is prevented from moving, the device is unstable, the problem that influences the sampling effect, through steel loop 5 fixed connection between two place bracing piece 4, the back fixedly connected with motor 6 of base 1, motor 6's output fixedly connected with first belt pulley 7, place the equal fixedly connected with connecting seat 8 in the back of bracing piece 4, the back grafting of connecting seat 8 has screw thread piece 9, screw thread groove 21 has been seted up in the front of screw thread piece 9, screw thread seat 22 of screw thread groove 21 inner wall's surface swing joint has the screw thread seat 22 with screw thread looks adaptation of screw thread groove 21, screw thread seat 22 and telescopic link 12 are located screw thread piece 9's fixed surface connection, make telescopic link 12 promote extrusion piece 13 through the rotation of screw thread piece 9 that sets up, impact sampling is carried out to sampling tube 14, the sample tube 14 is used to the convenience of use, also let equipment can be suitable for the sampling tube 14 of multiple different length, improve equipment's suitability, through driving belt 11 drive connection between first belt pulley 7 and the second belt pulley 10, one side grafting of screw thread piece 9 has telescopic link 12, the screw thread end of telescopic link 12 runs through screw thread piece 9 and extends to screw thread piece 9 and is kept away from screw thread piece 12, the sample tube 14 is kept away from the screw thread piece 12, the sample tube is used to the side of the telescopic link 15, the sample tube is used to the sample tube is used, the sample tube is used to the sample ring 15, the sample tube is used to be more than the sample tube is used to the sample ring 15.
Working principle: when the device is used, firstly, a soil table for placing equipment is formed on the ground, then the equipment is vertically placed on the soil table, the cutting ring 15, the friction block 17 and the soil table are lapped, then the switch 27 is opened, the first belt pulley 7 drives the second belt pulley 10 to rotate, the thread seat 22 moves up and down in the thread groove 21, then the sampling tube 14 is pressed downwards through the extrusion block 13 connected with the telescopic rod 12, the sampling tube 14 slides between the placing support rods 4, the soil body at the lower port of the glass tube is gradually removed by the cutting ring 15, the sampling can be completed after the telescopic rod 12 and the extrusion block 13 are pushed to a proper position, and when the transverse sampling is performed, the switch 27 is opened by fixing the equipment after the equipment is pushed to a proper position. This acquire equipment of cylindrical undisturbed soil of jumbo size, later through base 1 and running wheel 20 that set up, let the user can be very convenient remove the equipment suitable position, can directly open switch 27 after the fixed equipment and use, let the equipment can carry out horizontal sample, through cutting ring 15 the unnecessary loess, adopt the mode that is similar to the cutting ring sample to take a sample, improve the effect of the horizontal sample of equipment. And, acquire the cylindrical undisturbed soil's of jumbo size equipment, make telescopic link 12 promote extrusion piece 13 through the rotation of screw thread piece 9 that sets up, impact the sample to sampling tube 14, facilitate the use, also let equipment can be suitable for the sampling tube 14 of multiple different length and use, improve the suitability of equipment to through the setting of the fixed cover 24 of sample and connecting piece 23 that sets up, the position of restriction sampling tube 14 prevents that sampling tube 14 from moving out the equipment.
The soil sampling method comprises the following steps: for the undisturbed sample, when taking the vertical sample, the excavation was done down to a depth of about 3m, and a soil stand was shoveled out at the 2m position, leaving a vertical plane. The sampling tube 14 is tightly attached to the steel ring 5 (figure 5), soil at the port of the sampling tube 14 is gradually removed downwards, the upper end of the sampling tube 14 is covered by a wood plate, the wood plate is gently knocked by a rubber hammer, the cutting edge at the front end of the sampling tube 14 is used for removing excessive loess, the principle is similar to that of ring cutting sampling, and the method is adopted to enable undisturbed soil to be tightly screwed with the wall of the sampling tube 14, so that the leakage of the side wall in the test process is effectively prevented.
In the present invention, for example, the horizontal soil sample is located at 2.5m below the earth's surface (FIG. 6). Firstly, leveling at the position of 2.5m, reserving a 40cm soil table, and cutting soil grooves on two sides of the soil table so as to facilitate the sampling tube 14 to cut off excessive loess when forward. As the sampling tube 14 advances, the placement support rod 4 also advances. When the extension of the support rod 4 is large, the horizontal soil sample may be broken due to the heavy soil sample, the lower part of the front semicircular steel ring 5 is supported by a wood plate, and the level of the sampling tube 14 is ensured. The sampling tube 14 advances, and the support below the steel ring 5 advances along with the advance, so that the measure can effectively ensure that the horizontal soil sample is not broken in the sampling process.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the invention in any way, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention falls within the scope of the technical solution of the present invention.

Claims (1)

1. A sampling method for obtaining large-size cylindrical undisturbed soil is characterized by comprising the following steps of: for an undisturbed sample, when the vertical sample is taken, a soil table is shoveled out after a certain depth is excavated downwards, a vertical plane is reserved, a sampling pipe of sampling equipment is clung to a steel ring, soil at the port of the sampling pipe is gradually cut downwards, the upper end of the sampling pipe is covered by a wood plate, a rubber hammer is used for lightly beating the wood plate, and the cutting edge at the front end of the sampling pipe cuts off excessive loess, so that the undisturbed soil is tightly meshed with the pipe wall of the sampling pipe, and side wall leakage in the test process is effectively prevented; leveling a horizontal soil sample under the ground, reserving soil platforms, cutting soil grooves on two sides of the soil platforms so as to facilitate the removal of excessive loess when a sampling pipe advances, arranging a supporting rod to advance along with the sampling pipe, supporting the lower part of a front semicircular steel ring by a wood plate when the supporting rod is arranged, ensuring the level of the sampling pipe, and advancing the sampling pipe and supporting the lower part of the steel ring along with the supporting rod; sampling equipment includes the base, the top fixedly connected with base bracing piece of base, the top fixedly connected with of base bracing piece places the seat, place the top fixedly connected with of seat and place the bracing piece, through steel loop fixed connection between the two bracing pieces, the back fixedly connected with motor of base, the output fixedly connected with first belt pulley of motor, the equal fixedly connected with connecting seat in the back of placing the bracing piece, the back grafting of connecting seat has the screw thread piece, the fixed surface of screw thread piece is connected with the second belt pulley, connect through the driving belt transmission between first belt pulley and the second belt pulley, peg graft in one side of screw thread piece has the telescopic link, the screw thread end of telescopic link runs through the screw thread piece and extends to the outside of screw thread piece, the one end fixedly connected with extrusion piece of keeping away from the screw thread piece of telescopic link, the top overlap joint of steel loop has the sampling tube, the one end fixedly connected with cutting ring of telescopic link is kept away from to the sampling tube.
CN201811017736.4A 2018-09-03 2018-09-03 Sampling method for obtaining large-size cylindrical undisturbed soil Active CN108827699B (en)

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Publication number Priority date Publication date Assignee Title
CN109900535B (en) * 2019-04-12 2023-11-21 北京地矿工程建设有限责任公司 Measuring device for soil in water content test
CN112033734B (en) * 2020-09-16 2023-08-18 贵州工程应用技术学院 High-precision in-service concrete strength rapid detection equipment
CN114002008B (en) * 2021-11-24 2023-08-15 滨州学院 Sampling device for soluble organic carbon in coastal wetland soil and using method thereof

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1144020A1 (en) * 1983-11-18 1985-03-07 Институт почвоведения и фотосинтеза АН СССР Device for sampling soils and grounds
JP2002266339A (en) * 2001-03-06 2002-09-18 Koken Boring Mach Co Ltd Soil sampler
JP2006105730A (en) * 2004-10-04 2006-04-20 National Agriculture & Bio-Oriented Research Organization Device for sampling large undisturbed soil core
CN105587317A (en) * 2014-11-16 2016-05-18 西安扩力机电科技有限公司 Cylindrical sampling device for loess samples
CN105954059A (en) * 2016-06-01 2016-09-21 青岛农业大学 Convenient undisturbed soil taking device
CN106323680A (en) * 2016-08-19 2017-01-11 张福谦 Easy-sampling geological sample sampling mechanism
JP2017031573A (en) * 2015-07-29 2017-02-09 一般社団法人地盤工房 Soil sampling device
CN208705085U (en) * 2018-09-03 2019-04-05 中国人民解放军空军工程大学 A kind of equipment obtaining large scale cylinder undisturbed soil

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1144020A1 (en) * 1983-11-18 1985-03-07 Институт почвоведения и фотосинтеза АН СССР Device for sampling soils and grounds
JP2002266339A (en) * 2001-03-06 2002-09-18 Koken Boring Mach Co Ltd Soil sampler
JP2006105730A (en) * 2004-10-04 2006-04-20 National Agriculture & Bio-Oriented Research Organization Device for sampling large undisturbed soil core
CN105587317A (en) * 2014-11-16 2016-05-18 西安扩力机电科技有限公司 Cylindrical sampling device for loess samples
JP2017031573A (en) * 2015-07-29 2017-02-09 一般社団法人地盤工房 Soil sampling device
CN105954059A (en) * 2016-06-01 2016-09-21 青岛农业大学 Convenient undisturbed soil taking device
CN106323680A (en) * 2016-08-19 2017-01-11 张福谦 Easy-sampling geological sample sampling mechanism
CN208705085U (en) * 2018-09-03 2019-04-05 中国人民解放军空军工程大学 A kind of equipment obtaining large scale cylinder undisturbed soil

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