CN206557142U - Resistivity Dmt is popped one's head in - Google Patents
Resistivity Dmt is popped one's head in Download PDFInfo
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- CN206557142U CN206557142U CN201720153854.2U CN201720153854U CN206557142U CN 206557142 U CN206557142 U CN 206557142U CN 201720153854 U CN201720153854 U CN 201720153854U CN 206557142 U CN206557142 U CN 206557142U
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- resistivity
- dmt
- insulating barrier
- feeler lever
- utility
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Abstract
The utility model discloses a kind of resistivity Dmt probe, it includes being provided with insulating barrier on flat chisel gauge head and feeler lever, the feeler lever；Coaxial spaced is disposed with two ring electrodes vertically on the insulating barrier；Each ring electrode is electrically connected by a wire with receiving the input of instrument.The utility model is simple in construction, manufacture is easy to use, which solves the technical problem that current flat dilatometer does not possess the function of synchronism detection soil body resistivity.The utility model installs resistivity test system on Dmt probe top, the function of Flat Dilatometer Test synchronism detection soil layer resistivity is realized, the performance and application of instrument is extended, experimentation cost is saved, survey efficiency is improved, with stronger practicality.
Description
Technical field
The utility model is related to a kind of flat dilatometer, and the soil body can continuously be tested by belonging to one kind in Geotechnical Engineering field
The Flat Dilatometer Test device of In-situ resistance rate, and in particular to for a kind of resistivity Dmt probe.
Background technology
Flat Dilatometer Test refers to using static(al) device that by a spade probe indentation test soil layer pressurization makes flat chisel side
Circular steel membrane, which is expanded outwardly, to be tested, and is a kind of advanced in-situ testing technique, it is adaptable to general cohesive soil, silt, loose
~in close sand etc., available for Seines types and state is judged, it is determined that the Young's modulus of soil, coefficient of static earth pressure, bedding system
The mechanics index of physics such as number, the coefficient of consolidation.In the world since 1980 in geotechnical engineering investigation extensively using Dmt
Experiment, China just started the principle introduced and tested using this technology, Nan Guang geological instruments factory according to DMT in 1998, tried
The domestic DMT-W1 type flat dilatometers of work(are made, the basic function of Flat Dilatometer Test is realized.
The resistivity of soil is the basic parameter for characterizing soil body electric conductivity, is the intrinsic physical index of soil, depending on soil
Porosity, pore shape, pore water resistivity, saturation degree, water content, solid particulate components etc..In geotechnical engineering investigation and ring
Border Geotechnical Engineering field, the resistance parameter of soil layer is an important physical index.Current Flat Dilatometer Test ground at home
It is used widely in engineering investigation and environmental geotechnical field, but does not possess the function of test beds resistivity, makes it
Application is necessarily limited to.Therefore, a kind of flat dilatometer with synchronism detection soil body resistivity is invented, it can be enriched
Application function, extends it and uses scope, improves prospecting efficiency, saves experimentation cost.
The content of the invention
The problem of not possessing synchronism detection soil body resistivity for current flat dilatometer, the present invention provides a kind of be used for together
Walk the Dmt probe of test beds resistivity.The present invention installs resistivity test system, electricity on Dmt probe top
Resistance rate Design of Test System does not change the original structure and function of instrument into standalone module, realizes Flat Dilatometer Test synchronous
The function of test beds resistivity.
In order to solve the above technical problems, the utility model employs such a resistivity Dmt probe, it includes
Insulating barrier is provided with flat chisel gauge head and feeler lever, the feeler lever；Coaxial spaced is disposed with two rings vertically on the insulating barrier
Shape electrode；Each ring electrode is electrically connected by a wire with receiving the input of instrument.
In a kind of preferred embodiment of the present utility model, the insulating barrier is set on the feeler lever.
In a kind of preferred embodiment of the present utility model, in one end of the central axially extending bore of the feeler lever is provided with
Screw thread；The end of the flat chisel gauge head is provided with internal thread；The feeler lever and the flat chisel gauge head are connected by double thread pedestal
Connect；The insulating barrier is set on the double thread pedestal.
In a kind of preferred embodiment of the present utility model, it is provided with the double thread pedestal described for installing
The annular recess or limiting stand of insulating barrier；The central axially extending bore towards the feeler lever is provided with the double thread pedestal
Circular hole.
In a kind of preferred embodiment of the present utility model, the insulating barrier is ring-shaped plastics insulator；The insulation
Spaced set has two annular recess for being used to install the ring electrode vertically on layer；Each annular recess bottom
The through hole for conducting wire is provided with, the through hole leads to the center of the feeler lever axially from the bottom of the annular recess
Through hole.
In a kind of preferred embodiment of the present utility model, it is provided with the feeler lever for the spacing insulating barrier
Upper limit platform and lower limit platform；The insulating barrier be installed between the upper limit platform and the lower limit platform and with the feeler lever
It is coaxially arranged.
In a kind of preferred embodiment of the present utility model, the electrode is copper annular electrode.
In a kind of preferred embodiment of the present utility model, the insulating barrier is located at the close flat chisel of the feeler lever
One end of gauge head
In a kind of preferred embodiment of the present utility model, it is provided with the reception instrument and calculates two for handling
The single-chip microcomputer of voltage signal between the electrode.
In a kind of preferred embodiment of the present utility model, it is provided with the reception instrument for being carried to the electrode
For the power supply of constant current.
The beneficial effects of the utility model are：The utility model is simple in construction, manufacture is easy to use, realize Dmt
Test the function of synchronism detection soil layer resistivity, extend the performance and application of instrument, save experimentation cost, improve and survey
Operating efficiency is examined, with stronger practicality.Set on the feeler lever that the utility model passes through flat dilatometer in the prior art
Double-ring electrode with insulating barrier, and it is directly same that the double-ring electrode drop signal of instrument acquisition is received when being tested by working
Step calculates test soil body resistivity, so as to solve the function that current flat dilatometer does not possess synchronism detection soil body resistivity
Technical problem.The utility model installs resistivity test system on Dmt probe top；Meanwhile, the utility model also leads to
Cross and the installation that limiting stand facilitates insulating barrier is processed on feeler lever, by realizing ring-type electricity to processing annular recess on insulating barrier
The Fast Installation of pole, so that assembly work of the present utility model is shortened, and second of embodiment passes through double thread pedestal
Setting, facilitate resistivity flat dilatometer rapid processing assembling, while the need for being easy to according to different soil resistivity
Quick-replaceable ring electrode；Double-ring electrode is connected with receiving instrument by wire so that receiving instrument can be to double-ring
Electrode can directly calculate soil layer resistivity while providing constant current, so as to highly shortened Flat Dilatometer Test
Man-hour.
Brief description of the drawings
Fig. 1 is a kind of structural representation of resistivity Dmt probe of the utility model embodiment；
Fig. 2 is a kind of insulation layer structure schematic diagram of resistivity Dmt probe of the utility model embodiment；
Fig. 3 is a kind of insulation layer structure front view of resistivity Dmt probe of the utility model embodiment；
Fig. 4 is a kind of insulation layer structure left view of resistivity Dmt probe of the utility model embodiment；
Fig. 5 is the utility model embodiment a kind of insulating barrier and ring electrode mounting structure of resistivity Dmt probe
Schematic diagram；
Fig. 6 is the utility model embodiment a kind of insulating barrier and ring electrode mounting structure of resistivity Dmt probe
Sectional view；
Fig. 7 is that a kind of insulating barrier of resistivity Dmt probe of the utility model embodiment is installed with double thread pedestal
Structure sectional view
Fig. 8 is a kind of double thread base construction schematic diagram of resistivity Dmt probe of the utility model embodiment；
In figure：1- ring electrodes, 2- insulating barriers, 3- internal circuitries, 4- receives instrument, and 5- feeler levers, 6- flat chisels are surveyed
Head, 7- double thread pedestals, 2a- annular recess, 2b- through holes, the 5a- upper limits are platform, 5b- lower limit platforms.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only to explain this
Utility model, is not used to limit the utility model.
A kind of resistivity Dmt probe of the present invention, it includes being set with insulation on flat chisel gauge head 6 and feeler lever 5, feeler lever 5
Layer 2, insulating barrier 2 is located at one end of the close flat chisel gauge head 6 of feeler lever 5；Coaxial spaced is disposed with two ring electrodes on insulating barrier 2
1；Each ring electrode 1 is electrically connected to form a closed circuit by an independent wire 3 with receiving the input of instrument 4；Absolutely
Edge layer 2 is ring-shaped plastics insulator；Two annular recess 2a for being used to install ring electrode 1 are equidistantly provided with insulating barrier 2；
Each annular recess 2a is provided with the through hole 2b for conducting wire 3, and through hole 2b leads to feeler lever 5 from annular recess 2a bottom
Central axially extending bore；The upper limit platform 5a and lower limit platform 5b for spacing insulating barrier 2 are provided with feeler lever 5；Insulating barrier 2 is pacified
Loaded between upper limit platform 5a and lower limit platform 5b and coaxially arranged with feeler lever 5；Ring electrode 1 is copper annular ring electrode；
Receive the single-chip microcomputer for being provided with instrument 4 and voltage signal between two ring electrodes 1 being calculated for processing；Receive and set in instrument 4
Be equipped with the power supply for constant current to be provided ring electrode 1.It may be noted that the feeler lever 5 in the utility model is prior art
The hollow feeler lever of middle flat dilatometer.It is of the present utility model another be embodiment, it is of the present utility model for convenience
Flat dilatometer is according to quickly changing ring electrode 1 the need for different soil, the individually designed double end of the utility model
Screw base 7, while one end of the central axially extending bore of feeler lever 5 is provided with internal thread, the end of flat chisel gauge head 6 is provided with interior spiral shell
Line；Feeler lever 5 and flat chisel gauge head 6 are connected by double thread pedestal 7；Insulating barrier 2 is set on double thread pedestal 7；Double end spiral shell
The annular recess or limiting stand for installing insulating barrier 2 are provided with line pedestal 7；It is provided with and leads on double thread pedestal 7
The circular hole of the central axially extending bore of feeler lever 5.
During using the utility model, resistivity Dmt is popped one's head in insertion soil layer to be tested, the utility model is treated
In double-ring electrode insertion soil layer in after certain depth, open and receive instrument 4 and provide stabilized power source for double-ring electrode, together
When because double-ring electrode 1 is with receiving closed-loop path connect of the formation of instrument 4, so as to which using receiving, instrument 4 is synchronous, connect
The voltage between two ring electrodes is measured continuously, then by receiving the single-chip microcomputer in instrument 4, the electricity two ring electrodes
Pressure signal is received, gathered and calculated, and finally shows the resistivity value of soil layer；Test philosophy is that soil layer resistivity is by surveying
The voltage drop Δ V between two ring electrodes under constant current is tried, and the size for calculating soil layer resistance R according to Ohm's law is drawn
's.The vertical electricalresistivityρ of soil layer is represented by：
In formula：
ρ --- soil layer resistivity
R --- soil layer resistance；
S --- ring electrode area；
L --- ring electrode spacing；
Δ V --- voltage drop between two ring electrodes；
I --- current strength.
As another embodiment of the present utility model, insulating barrier of the present utility model can be used as an independent mould
Block, is cylinder, is connected installed in the top of Dmt probe and then again with feeler lever
It should be appreciated that the foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not
Be confined to this, any those skilled in the art disclosed herein technical scope in, the change that can be readily occurred in
Or replace, it should all be included within the scope of the present invention.
Claims (10)
1. a kind of resistivity Dmt probe, including flat chisel gauge head (6) and feeler lever (5), it is characterised in that：The feeler lever (5)
On be provided with insulating barrier (2)；Coaxial spaced is disposed with two ring electrodes (1) vertically on the insulating barrier (2)；It is each described
Ring electrode (1) is electrically connected by a wire (3) with receiving the input of instrument (4).
2. a kind of resistivity Dmt probe according to claim 1, it is characterised in that：Insulating barrier (2) suit
In on the feeler lever (5).
3. a kind of resistivity Dmt probe according to claim 1, it is characterised in that：The center of the feeler lever (5)
One end of axially extending bore is provided with internal thread；The end of the flat chisel gauge head (6) is provided with internal thread；The feeler lever (5) and institute
Flat chisel gauge head (6) is stated to connect by double thread pedestal (7)；The insulating barrier (2) is set in the double thread pedestal (7)
On.
4. a kind of resistivity Dmt probe according to claim 3, it is characterised in that：The double thread pedestal
(7) annular recess or limiting stand for installing the insulating barrier (2) are provided with；Set on the double thread pedestal (7)
It is equipped with the circular hole towards the central axially extending bore of the feeler lever (5).
5. popped one's head according to any described a kind of resistivity Dmt in claim 1-4, it is characterised in that：The insulating barrier
(2) it is ring-shaped plastics insulator；Spaced set has two to be used to install the ring electrode vertically on the insulating barrier (2)
(1) annular recess (2a)；Each annular recess (2a) bottom is provided with the through hole (2b) for conducting wire (3),
The through hole (2b) leads to the central axially extending bore of the feeler lever (5) from the bottom of the annular recess (2a).
6. a kind of resistivity Dmt probe according to claim 1, it is characterised in that：Set on the feeler lever (5)
There are the upper limit platform (5a) and lower limit platform (5b) for the spacing insulating barrier (2)；The insulating barrier (2) is installed on described
It is between limiting stand (5a) and the lower limit platform (5b) and coaxially arranged with the feeler lever (5).
7. a kind of resistivity Dmt probe according to claim 1, it is characterised in that：The electrode (1) is copper
Annular electrode.
8. a kind of resistivity Dmt probe according to claim 1, it is characterised in that：The insulating barrier (2) is located at
One end of the close flat chisel gauge head (6) of the feeler lever (5).
9. popped one's head according to any described a kind of resistivity Dmt in claim 1-4, it is characterised in that：The receiving instrument
The single-chip microcomputer that voltage signal between two electrodes (1) is calculated for processing is provided with table (4).
10. popped one's head according to any described a kind of resistivity Dmt in claim 1-4, it is characterised in that：It is described to receive
Be provided with the power supply for constant current to be provided the electrode (1) in instrument (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720153854.2U CN206557142U (en) | 2017-02-21 | 2017-02-21 | Resistivity Dmt is popped one's head in |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720153854.2U CN206557142U (en) | 2017-02-21 | 2017-02-21 | Resistivity Dmt is popped one's head in |
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| Publication Number | Publication Date |
|---|---|
| CN206557142U true CN206557142U (en) | 2017-10-13 |
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ID=60360072
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109030945A (en) * | 2018-06-08 | 2018-12-18 | 同济大学 | A kind of soil resistivity sensing device based on high-density electric observation |
-
2017
- 2017-02-21 CN CN201720153854.2U patent/CN206557142U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109030945A (en) * | 2018-06-08 | 2018-12-18 | 同济大学 | A kind of soil resistivity sensing device based on high-density electric observation |
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