CN214334272U - Multifunctional soil sampling device - Google Patents
Multifunctional soil sampling device Download PDFInfo
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- CN214334272U CN214334272U CN202022420603.0U CN202022420603U CN214334272U CN 214334272 U CN214334272 U CN 214334272U CN 202022420603 U CN202022420603 U CN 202022420603U CN 214334272 U CN214334272 U CN 214334272U
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- 238000005527 soil sampling Methods 0.000 title claims abstract description 53
- 239000002689 soil Substances 0.000 claims abstract description 66
- 238000012360 testing method Methods 0.000 claims abstract description 42
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 238000010008 shearing Methods 0.000 claims abstract description 11
- 239000011229 interlayer Substances 0.000 claims description 11
- 239000010410 layer Substances 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 4
- 238000011835 investigation Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012625 in-situ measurement Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model provides a multifunctional soil sampling device, which comprises a soil sampling system, a resistivity test system, a soil body strength test system, a shell and a controller; the soil sampling system comprises a soil sampling pipe; the soil sampling pipe is arranged in the shell; the resistivity testing system is provided with a plurality of annular electrodes, and the plurality of annular electrodes are arranged on the inner wall of the shell from top to bottom through an insulating plastic layer; the resistivity testing system is connected with the controller; the soil body strength testing system comprises a stepping motor, a torsion sensor and a shearing mechanism; the stepping motor is connected with the upper part of the shell, the shearing mechanism is installed on the shell, and the torsion sensor is respectively connected with the stepping motor and the controller. The utility model discloses both can carry out the sample work of soil again on the shear strength of the fast survey resistivity and the soil body on normal position soil, collect a plurality of functions in an organic whole, improve the efficiency of geological survey greatly, and practice thrift the test cost.
Description
Technical Field
The utility model belongs to the technical field of geotechnical engineering, especially, relate to a multi-functional geotome.
Background
In the geotechnical engineering detection process, soil sample collection is often required, and soil samples of different strata are further subjected to geotechnical tests to know the physical and mechanical properties of the soil samples. However, the geological conditions of all engineering areas are different, different detection projects have different requirements on soil sampling depth and soil sample size, and the quality of a soil sample is divided into I, II, III and IV grades according to the purpose of a test. Grade I soil sample: without disturbance, the soil classification, water content, density, strength and consolidation tests can be carried out; and (3) a grade II soil sample: slightly disturbing, and performing soil classification, water content and density tests; grade III soil sample: obviously disturbing, and performing soil classification and water content tests; grade IV soil sample: and (5) completely disturbing, and naming the soil as far as possible.
The resistivity of soil is a basic parameter for representing the conductivity of soil body, is an inherent physical index of soil, and depends on the porosity, pore shape, pore water resistivity, saturation, water content, solid particle components and the like of the soil. In the fields of geotechnical engineering investigation and environmental geotechnical engineering, the resistivity parameter of a soil layer is an important physical index. In the field of geotechnical engineering investigation, in order to determine the non-drainage shear strength of saturated soft clay, the non-drainage shear strength of remolded soil and the sensitivity of soil body, an in-situ cross plate shear test is generally adopted.
The soil sampler is widely applied to the fields of geotechnical engineering investigation and environmental geotechnical engineering, but the functions are single, so that the application range of the soil sampler is greatly limited.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model provides a device that fetches earth of measurable resistivity, the utility model discloses both can carry out the sample work of soil again on the shear strength of the rapid survey resistivity and the soil body on normal position soil, collect a plurality of functions in an organic whole, have the function of synchronous test soil body resistivity, soil body shear strength and fetching earth, improved the efficiency of geological survey greatly, and practice thrift the test cost.
The utility model discloses a technical scheme realizes: a multifunctional soil sampling device comprises a soil sampling system, a resistivity test system, a soil body strength test system, a shell and a controller;
the soil sampling system comprises a soil sampling pipe; the soil sampling pipe is arranged in the shell;
the resistivity testing system is provided with a plurality of annular electrodes, and the plurality of annular electrodes are arranged on the inner wall of the shell from top to bottom through an insulating plastic layer; the resistivity testing system is connected with the controller;
the soil body strength testing system comprises a stepping motor, a torsion sensor and a shearing mechanism; the stepping motor is connected with the upper part of the shell, the shearing mechanism is installed on the shell, and the torsion sensor is respectively connected with the stepping motor and the controller.
In the above scheme, the resistivity testing system includes a first annular electrode, a second annular electrode, a third annular electrode, and a fourth annular electrode; the first annular electrode, the second annular electrode, the third annular electrode and the fourth annular electrode are sequentially arranged on the inner wall of the shell from top to bottom through insulating plastic layers.
Further, the shell is provided with a hollow interlayer; a circuit and a signal processing system are arranged in the hollow interlayer; and the signal processing system is respectively connected with the resistivity testing system and the controller through lines.
Further, the signal processing system comprises an A/D signal converter, a current filter, a voltage filter and a voltage amplifier;
the first annular electrode, the fourth annular electrode, the current amplifier and the current filter are connected in series, the second annular electrode, the third annular electrode, the voltage amplifier and the voltage filter are connected in series, and the two series circuits are connected in parallel and convert current signals into digital signals through the A/D signal converter and send the digital signals to the controller.
In the above scheme, distances between adjacent ring electrodes are all equal.
In the above scheme, the shearing mechanism comprises four shearing plates; the four shear plates are oppositely arranged on the shell in pairs.
In the above scheme, the stepping motor is connected with the upper part of the shell through the extension rod.
Further, the device also comprises a hydraulic device; the hydraulic device is installed on the extension rod.
In the scheme, the upper part of the shell is provided with a drainage channel; and a ball valve is arranged in the drainage channel, one end of the drainage channel is communicated with the soil sampling pipe, and the other end of the drainage channel is communicated with the outside.
In the above scheme, the soil sampling pipe can be split left and right.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses can test the shear strength of soil resistivity and the soil body in succession in the normal position test to can realize the soil sample simultaneously, collect a plurality of functions in an organic whole, improve the efficiency of geological survey greatly, and practice thrift the test cost. And the traditional soil sampler is improved, so that the disturbance of a soil body in the soil sampling process is greatly reduced, the in-situ measurement is carried out on the resistivity of the on-site soil layer, and the resistivity measurement precision is effectively improved.
Drawings
Fig. 1 is a schematic cross-sectional view of a multifunctional soil sampling device according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an embodiment of the present invention.
Fig. 3 is a schematic view of a soil sampling pipe according to an embodiment of the present invention.
Fig. 4 is a schematic view illustrating the opening of the soil sampling pipe according to an embodiment of the present invention.
In the figure: 1. a controller; 2. a stepping motor; 3. a torque sensor; 4. a hydraulic device; 5. a line; 6. an extension pole; an A/D signal converter; 8. a drain hole; 9. a ball valve; 10. a current filter; 11. a first ring electrode; 12. a voltage filter; 13. a soil sampling pipe; 14. a second ring-shaped electrode; 15. a hollow interlayer; 16. insulating paint; 17. a current amplifier; 18. a third ring electrode; 19. a fourth annular electrode; 20. an insulating plastic layer; 21. a shear plate; 22. the outer wall of the hollow interlayer; 23. the inner wall of the hollow interlayer; 25. the interior of the soil sampling pipe; 26. a soil sampling pipe; 27. a bolt I; 28. and a bolt II.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Fig. 1 shows a preferred embodiment of the multifunctional soil sampling device, which comprises a soil sampling system, a resistivity testing system, a soil strength testing system, a housing and a controller 1.
As shown in fig. 2, the soil sampling system includes a soil sampling pipe 26; the soil sampling pipe 26 is arranged in the shell; the resistivity testing system is provided with a plurality of annular electrodes, and the annular electrodes are sequentially arranged on the inner wall of the shell through insulating plastic layers 20 at equal intervals from top to bottom; the resistivity testing system is connected with the controller 1; the soil body strength testing system comprises a stepping motor 2, a torsion sensor 3 and a shearing mechanism; the stepping motor 2 is connected with the upper part of the shell, the shearing mechanism is installed on the shell, and the torsion sensor 3 is respectively connected with the stepping motor 2 and the controller 1.
The resistivity test system comprises four copper ring electrodes: a first ring electrode 11, a second ring electrode 14, a third ring electrode 18, and a fourth ring electrode 19; the first annular electrode 11, the second annular electrode 14, the third annular electrode 18 and the fourth annular electrode 19 are sequentially arranged on the inner wall of the shell from top to bottom through the insulating plastic layer 20.
The shell is provided with a hollow interlayer 15 and comprises a hollow interlayer outer wall 22 and a hollow interlayer inner wall 23; a circuit 5 and a signal processing system are arranged in the hollow interlayer 15; the signal processing system is connected with the controller 1 through a line 5 and a resistivity testing system respectively.
The signal processing system comprises an A/D signal converter 7, a current filter 10, a voltage filter 12 and a voltage amplifier 13; the first ring electrode 11, the fourth ring electrode 19, the current amplifier 17 and the current filter 10 are connected in series, the second ring electrode 14, the third ring electrode 18, the voltage amplifier 13 and the voltage filter 12 are connected in series, and the two series circuits are connected in parallel and convert the current signal into a digital signal through the A/D signal converter 7 and send the digital signal to the controller 1.
The distances between the adjacent annular electrodes on the soil sampling pipe 26 are equal.
The shearing mechanism comprises four shearing plates 21; four shear plates 21 are arranged on the housing in pairs opposite to each other.
The stepping motor 2 is in threaded connection with the upper part of the shell through an extension rod 6.
Also comprises a hydraulic device 4; the hydraulic means 4 is mounted on an extension rod 6.
The upper part of the shell is provided with a drainage channel 8; a ball valve 9 is arranged in the drainage channel 8, one end of the drainage channel 8 is communicated with the soil sampling pipe 26, and the other end of the drainage channel is communicated with the outside. The drainage channel 8 is used for draining underground water in deep soil, the spherical valve 9 originally blocks the drainage channel 8, the underground water enters the soil sampling pipe 26, the ball body of the spherical valve 9 is flushed by the pressure of the water, the drainage channel 8 is opened, and after the water flows out of the soil sampler through the drainage channel 8, the ball body of the spherical valve 9 returns to the original position to block the outlet of the drainage channel 8.
As shown in fig. 3 and 4, the soil sampling pipe 26 can be opened in the left-right direction, and the soil sampling pipe interior 25 is used for sampling soil. Specifically, the lower part of the soil sampling pipe 26 is provided with a bolt I27 and a bolt II28 which are symmetrical, when the soil sampling pipe 26 is sent to a laboratory, the split disassembly can be carried out, the method is also favorable for the soil sample to be disturbed less, and the parameters of the soil body can be obtained better.
The utility model discloses a working process:
firstly, a soil body to be tested is punched by a deep hole drilling machine, after the soil body is punched to a measured depth, the soil body is driven into the bottom of a hole by a hydraulic device 4, and the soil body is inserted into the hole by a preset depth. And starting a power supply with constant current, inputting sine wave test current with the frequency of 65Hz and the effective value of 0-5A into the first annular electrode 11 and the fourth annular electrode 19, enabling the current to flow into the second annular electrode 14 and the third annular electrode 18 through the peripheral soil body, and forming voltage between the second annular electrode 14 and the third annular electrode 18.
The distances between adjacent annular electrodes on the soil sampling pipe 26 are all a, and insulating plastic layers 20 are arranged between the annular electrodes and on the outer sides of the annular electrodes. The voltage amplifier 13 amplifies the voltage between the second ring electrode 14 and the third ring electrode 18 and sends the amplified voltage to the voltage filter 12, and the current amplifier 17 amplifies the current signals measured by the second ring electrode 14 and the third ring electrode 18 and sends the amplified current signals to the current filter 10. The voltage filter 12 and the current filter 10 are used for filtering interference signals, only allow effective signals to pass through, and then transmit the effective signals to the a/D signal converter 7, and the a/D signal converter 7 converts the voltage and current analog signals into digital signals and transmits the digital signals to the controller 1. The controller 1 calculates and processes the obtained voltage and current data to obtain a resistivity value, and the measurement result is displayed through an LED screen.
The soil resistivity is calculated by the following formula:
ρ -resistivity of soil (Ω · m),
a-the distance (m) between the two electrodes,
u is the voltage V between the second ring electrode 14 and the third ring electrode 18,
i is the current a between the second ring electrode 14 and the third ring electrode 18.
After measuring soil resistivity, step motor 2 circular telegram drives shell and shear plate 21 clockwise rotation, and extension rod 6 also is clockwise rotation and connects, can not exert an influence to the connection between the extension rod 6 when wholly rotating. And then, reading data by a torsion sensor 3 connected with the stepping motor 2, transmitting the data to a ground controller 1, calculating the shear strength of the soil body and displaying the shear strength on an LED screen. Wherein the height of the shear plate 21 is H, and the diameter of the head of the shear plate 21 is D.
The shear strength of undisturbed soil is calculated by the following formula:
Cu＝10K'ξRy，
Cu-the shear strength (kPa) of undisturbed soil,
k' -constant (cm) related to shear plate head size-3)，
D-shear plate head diameter (cm),
h-shear plate head height (cm),
xi-shear plate head sensor calibration coefficient,
Ryreading of strain (μ) at undisturbed soil shear failureε)。
The exterior of the soil sampling tube 26 is coated with insulating paint 16 and a top thread-like design is used to connect with the upper end of the interior of the housing. The lower part of the soil sampling pipe 26 is provided with a symmetrical bolt I27 and a symmetrical bolt II28, and when the soil sampling pipe 26 is sent to a laboratory, the split disassembly can be carried out, so that the method is also favorable for the soil sample to be disturbed less, and the parameters of the soil body can be obtained better.
The utility model discloses with resistivity normal position test technique and shear strength's normal position test integration on the geotome, the utility model discloses possess the function of synchronous test soil body resistivity, soil body intensity and geotome, the utility model discloses the convenience carries out the normal position to on-the-spot soil layer resistivity and measures and effectual improvement resistivity measuring precision.
The above detailed description is only for the purpose of illustrating the practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the technical spirit of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A multifunctional soil sampling device is characterized by comprising a soil sampling system, a resistivity test system, a soil body strength test system, a shell and a controller (1);
the soil sampling system comprises a soil sampling pipe (26); the soil sampling pipe (26) is arranged in the shell;
the resistivity testing system is provided with a plurality of annular electrodes, and the annular electrodes are arranged on the inner wall of the shell from top to bottom through an insulating plastic layer (20); the resistivity testing system is connected with the controller (1);
the soil body strength testing system comprises a stepping motor (2), a torsion sensor (3) and a shearing mechanism; step motor (2) are connected with the upper portion of shell, shear the mechanism and install on the shell, torque sensor (3) are connected with step motor (2) and controller (1) respectively.
2. The multifunctional soil sampling device according to claim 1, wherein the resistivity testing system comprises a first annular electrode (11), a second annular electrode (14), a third annular electrode (18) and a fourth annular electrode (19); the first annular electrode (11), the second annular electrode (14), the third annular electrode (18) and the fourth annular electrode (19) are sequentially arranged on the inner wall of the shell from top to bottom through an insulating plastic layer (20).
3. The multifunctional soil sampling device according to claim 2, wherein the housing is provided with a hollow interlayer (15); a circuit (5) and a signal processing system are arranged in the hollow interlayer (15); the signal processing system is respectively connected with the resistivity testing system and the controller (1) through lines (5).
4. The multifunctional soil sampling device according to claim 3, wherein the signal processing system comprises an A/D signal converter (7), a current filter (10), a voltage filter (12) and a voltage amplifier (13);
the first annular electrode (11), the fourth annular electrode (19), the current amplifier (17) and the current filter (10) are connected in series, the second annular electrode (14), the third annular electrode (18), the voltage amplifier (13) and the voltage filter (12) are connected in series, and the two series circuits are connected in parallel and convert signals of current into digital signals through the A/D signal converter (7) and send the digital signals to the controller (1).
5. The multifunctional soil sampling device as claimed in claim 1, wherein the distances between adjacent ring electrodes are all equal.
6. The multi-functional earth borrowing device according to claim 1, wherein the shear mechanism comprises four shear plates (21); four shear plates (21) are arranged on the shell in a pairwise opposite manner.
7.A multifunctional soil sampling device according to claim 1, characterized in that the stepping motor (2) is connected with the upper part of the housing through an extension rod (6).
8. The multifunctional soil sampling device of claim 7, further comprising a hydraulic device (4); the hydraulic device (4) is arranged on the extension rod (6).
9. The multifunctional soil sampling device as claimed in claim 1, wherein the upper part of the outer casing is provided with a drainage channel (8); a ball valve (9) is arranged in the drainage channel (8), one end of the drainage channel (8) is communicated with the soil sampling pipe (26), and the other end of the drainage channel is communicated with the outside.
10. The multifunctional soil sampling device as claimed in claim 1, wherein the soil sampling pipe (26) can be split left and right.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022420603.0U CN214334272U (en) | 2020-10-27 | 2020-10-27 | Multifunctional soil sampling device |
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| CN202022420603.0U CN214334272U (en) | 2020-10-27 | 2020-10-27 | Multifunctional soil sampling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112268736A (en) * | 2020-10-27 | 2021-01-26 | 江苏大学 | Multifunctional soil sampling device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112268736A (en) * | 2020-10-27 | 2021-01-26 | 江苏大学 | Multifunctional soil sampling device |
| CN112268736B (en) * | 2020-10-27 | 2025-02-18 | 江苏大学 | A multifunctional soil taking device |
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