CN109300282A - A kind of method and apparatus of the slope instability early warning based on electric-resistivity method - Google Patents
A kind of method and apparatus of the slope instability early warning based on electric-resistivity method Download PDFInfo
- Publication number
- CN109300282A CN109300282A CN201811428084.3A CN201811428084A CN109300282A CN 109300282 A CN109300282 A CN 109300282A CN 201811428084 A CN201811428084 A CN 201811428084A CN 109300282 A CN109300282 A CN 109300282A
- Authority
- CN
- China
- Prior art keywords
- slope
- moisture content
- early warning
- function
- electric current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/10—Alarms for ensuring the safety of persons responsive to calamitous events, e.g. tornados or earthquakes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Health & Medical Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Emergency Management (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The present invention relates to a kind of slope instability method for early warning and device based on electric-resistivity method, the stability that its method passes through analysis of slope, obtain the function between the function and stability factor of slope K and moisture content ω of the stability factor of slope K of side slope soil sample, Slope Stability property coefficient K distinguishes assignment and limits side slope series, it finds out and defines moisture content, then the function between moisture content substitution K and moisture content ω will be defined, it finds out and defines resistivity, it is finally found out according to Ohm's law and defines electric current, by carrying out early warning to the setting for defining electric current.Device setting provided by the invention is simple, easy, facilitates installation, not affected by environment, reusable.Present invention firstly provides slope stability is monitored using electric-resistivity method, easy to operate, high reliablity provides reliable theoretical method for the potential unstability danger of side slope, greatly reduces due to slope instability bring economic loss and casualties.
Description
Technical field
The method and apparatus for the slope instability early warning based on electric-resistivity method that the present invention relates to a kind of, belong to slope geological work
Journey field.
Background technique
Slope geological reduces, greatly since Weak face occur in tomography, many reasons such as joint in geological process, level of ground water
Under numerous external cause actions such as gas precipitation, make side slope along Weak face generate Relative sliding and lead to unstability, and be most commonly encountered be by
The slope instability caused by Atmospheric precipitation.Slope instability geological disaster takes place frequently, and not only brings huge economic damage to country
It loses, and also brings potential danger to construction.But currently, slope instability method for early warning and system are with seriously lagging behind side slope
The engineer application of matter disaster, this is primarily due to method for early warning Shortcomings.So scientificlly and effectively side slope unstability carries out in advance
Implement of police has important scientific meaning and engineering application value.
The research of side slope unstability early warning at present is broadly divided into Slope Deformation Prediction research and the research of side slope threshold value of warning.It is right
It is to utilize the data and diversification of field monitoring based on mathematical method and theoretical model is combined in the research of Slope Deformation Prediction
Information, draws out one time graph of displacement of side slope, and establishes prediction model and carry out prediction.The research of side slope threshold value of warning
On the basis of being the probe the geological conditions of side slope and hydrologic condition situations such as and further investigation, the stabilization of side slope
Property and development trend make rationally judgement and various ranks alarm.The early-warning and predicting research on landslide is summed up, and mainly includes
Following four conceptual phase: the first stage is the empirical appearance early warning stage, and second stage is qualitative, sxemiquantitative early warning stage,
Three stages were theory study and monitoring and prediction stage, and fourth stage is to go deep into theoretical method, comprehensive pre-warning stage.Slope deforming is pre-
It surveys and the research of side slope threshold value of warning is all based on investigation and the data of monitoring carry out, error is big, and process is cumbersome, and early warning is not accurate,
And early warning can not achieve real-time monitoring.Especially when level of ground water changes or the influence of Atmospheric precipitation, it is easy to cause
Slope instability generates the hazards such as landslide, huge potential danger is brought to national economy and construction, so now needing to establish
A kind of method for early warning of slope instability.
Summary of the invention
(1) technical problems to be solved
In order to solve the above problem of the prior art, the present invention provides a kind of side of slope instability early warning based on electric-resistivity method
Slope stability can be effectively predicted in method.The present invention provides a kind of prior-warning device of slope instability based on electric-resistivity method.
(2) technical solution
In order to achieve the above object, the main technical schemes that the present invention uses include:
A method of the slope instability early warning based on electric-resistivity method comprising following steps:
The stability of S1, analysis of slope obtain the function (1) of the stability factor of slope K of side slope soil sample,
S2, the side slope soil body are sampled, and are derived soil body cohesive strength c according to triaxial compression test method, are rubbed in the soil body
Wipe angleWith the abstract function of moisture content ω are as follows: c=F1(ω),To obtain stability factor of slope K and contain
Function (2) between water rate ω；It further solves and obtains moisture content ω；
S3, according to the relationship of resistance and resistivity, derive the function obtained out between side slope electricalresistivityρ and moisture content ω
(3), it solves and obtains electricalresistivityρ；
The stability factor of slope K that S4, step S1 are obtained is greater than 1.5 and illustrates stability of slope；Set stability factor of slope K
It is three-level slope project when being 1.05~1.15；It is second level slope project when K is 1.15~1.29, when K is 1.30~1.50,
For level-one slope project；
S5, to stability factor of slope K distinguish assignment 1.05~1.15,1.15~1.29,1.30~1.50, according to function
(2) corresponding find out defines moisture content ω01, ω02, ω03, then will define moisture content ω01, ω02, ω03It is corresponding to bring function (3) into
It finds out and defines electricalresistivityρ01, ρ02, ρ03, electric current I is finally defined according to corresponding find out of Ohm's law01, I02, I03, realize by pair
Monitoring current changes to detect the variation of stability factor of slope, when electric current reaches I01When, three-level early warning is carried out, when electric current reaches
To I02When, second level early warning is carried out, when electric current reaches I03When, carry out level-one early warning.
Method as described above, it is preferable that in step sl, function (1) following formula of the stability factor of slope K
It is shown,
Wherein, c: indicating the cohesive strength of the soil body,The internal friction angle for indicating the soil body, γ: indicates the severe of the soil body, li: table
Show the arc length of the bottom surface of soil i, hi: indicate the height of soil i, bi: indicate the width of soil i, θi: the method at native bottom surface midpoint
The angle of cut of line and vertical line.
Method as described above, it is preferable that in step s 2, the function between stability factor of slope K and moisture content ω
(2) as follows,
Method as described above, it is preferable that in step s3, the function between side slope electricalresistivityρ and moisture content ω (3) out
As follows,
ρs: indicate the resistivity of pure soil, ρω: indicate the resistivity of water, ρ 'ω: indicate the density of water, ds: indicate the ratio of the soil body
Weight, ω: indicates the moisture content of the soil body, ρ ': indicating the density of the soil body.
Method as described above, it is preferable that be three-level side when setting stability factor of slope K as 1.12 in step s 4
Slope engineering；It is second level slope project when K is 1.25, is level-one slope project when K is 1.3.
Method as described above, it is preferable that in step s 5, assignment 1.1,1.2 is distinguished to stability factor of slope K,
1.3, it is found out according to function (2) and defines moisture content ω01, ω02, ω03, then will define moisture content ω01, ω02, ω03Bring letter into
Number (3), which is found out, defines electricalresistivityρ01, ρ02, ρ03, finally found out according to Ohm's law and define electric current I01, I02, I03, realize by pair
Monitoring current changes to detect the variation of stability factor of slope, when electric current reaches I01When, three-level early warning is carried out, when electric current reaches
To I02When, second level early warning is carried out, when electric current reaches I03When, carry out level-one early warning.
A kind of device of the slope stability early warning based on electric-resistivity method comprising battery, cathode electrode, anode electrode, electricity
Flowmeter and PCL controller and alarm unit, the anode of the anode electrode connection battery, the cathode electrode connection battery are born
Pole, the cathode electrode, anode electrode are inserted into the soil property of side slope to be measured, and the galvanometer is connected to positive or negative pole, are used for
The resistance of side slope to be measured is measured, the PCL controller connects the galvanometer, and the PCL controls device connection alarm unit, institute
The electric current for stating PCL controller acquisition galvanometer is higher than preset value, and starting alarm unit is alarmed.
Preferably, the anode electrode is copper electrode, and the cathode electrode is copper electrode, and the anode electrode is set as more
A, the anode electrode forms circular ring shape around cathode electrode, and the anode electrode is 8 meters at a distance from cathode electrode.
Further, the anode is preferably 8-12
Device as described above, it is preferable that described device further includes temperature sensor, and the temperature sensor is connected to electricity
The anode in pond, when the temperature of the temperature sensor measurement is higher than setting value, temperature controller control automaticallys cut off the power switch.
Preferably, when the temperature of the temperature sensor measurement is higher than 270 DEG C of setting value, temperature controller control is automatically cut off
Power switch.
Preferably, the preset value that the PCL controller is set controls alarm unit respectively and issues different alarms to be multiple
The tinkle of bells carries out early warning.
Device as described above, it is preferable that described device further includes transformer, and transformer connects to power supply, and controls voltage,
It is 30V in early warning stage voltage, when wanting the side slope soil body to be reinforced, can be adjusted voltage to 100V by transformer, into
Row draining, is reinforced.
Since water is polar molecule, under directional current effect, the interstitial water in soil can keep the soil body aqueous to movable cathode
Rate reduces.Electrode multianode arrangement, accelerates drainage speed, is conducive to the reinforcing of slope soil.So using high pressure pair
Slope soil is reinforced.
(3) beneficial effect
The beneficial effects of the present invention are:
Present invention firstly provides slope stability is monitored using electric-resistivity method, easy to operate, high reliablity is that side slope is potential
Unstability danger provides reliable theoretical method, greatly reduces due to slope instability bring economic loss and casualties.
Compared with prior art, theoretical method of the present invention is simple, and equipment arrangement is simple, and feasibility is high, not affected by environment,
And electrochemical principle is utilized, and it can be corroded to avoid electrode, reach that service life is permanent, reusable effect, and work as
Reach certain voltage, can also realize the effect of stabilization by drainage, transformer can be added on the basis of this again, can both be realized pre-
It is alert, and realize the effect reinforced, when stability factor of slope is too low, it can use transformer starting high voltage and carry out slope soil
It reinforces, reaches double effects, realize that, from forecast hidden danger to the process for excluding hidden danger, to construction, relatively reliable guarantor is carried out in economy-zone
Card.
Detailed description of the invention
Fig. 1 is the schematic diagram of slope instability prior-warning device；
Fig. 2 is the electrode plane layout drawing of slope instability prior-warning device；
Fig. 3 is slope instability prior-warning device schematic diagram.
[description of symbols]
1: battery；
2: negative electrode；
3: anode electrode；
4: side slope.
Specific embodiment
When level of ground water changes or the influence of Atmospheric precipitation, the moisture content of the soil body can change, and the soil body resists
Cutting intensity index can reduce with the increase of soil moisture content.When moisture content increase to a certain extent, the shearing strength of side slope
It is not enough to maintain stability of slope, in other words the stability coefficient of side slope is too low, and leads to slope instability, generates the danger such as landslide
Disaster brings huge potential danger to national economy and construction, so the present invention establishes a kind of pre- police of slope instability
Method.
The present inventor has apparent functional relation, and soil property according to analysis, native resistance and soil's water content
The stability coefficient of side slope also has apparent functional relation with soil's water content, and then can derive the resistance value and side slope of side slope
Stability coefficient between functional relation, the stable state of side slope can be reflected by the resistance change of soil, by side slope
Stability coefficient is converted into electric signal, is monitored with computer, and then side slope unstability carries out early warning, with reference to the accompanying drawing,
By specific embodiment, the present invention is described in detail.
Embodiment 1
A kind of slope instability method for early warning based on electric-resistivity method, comprising the following steps:
1. the establishment process of early warning system
The stability of analysis of slope first, analysis method assume to slide using most simple most ancient Swedish slice, the method
Dynamic face is an arc surface, and thinks that the overall stability of the active force side slope between stick influences less, to ignore, or
It says, it is assumed that the amount of force of stick two sides is equal, contrary and act on same straight line, it is possible to not consider.
And the time of Swedish slice application is long, has accumulated engineering experience abundant, the safety coefficient typically resulted in is relatively low, i.e. error
Relatively secure context, therefore be still at present common method in engineering.The slip circle that Swedish slice assumes is different, then the K found out
Value is just different, and wherein the safety stability coefficient of slight slope is calculated the smallest K value.Stability factor of slope K and soil body adhesive aggregation
Power c, soil body internal friction angleThe factors such as Slope Shape h, l are related, derive the abstract function of stability factor of slope are as follows:
C: the cohesive strength of the soil body is indicated, unit: Kpa；Indicate the internal friction angle of the soil body, unit: degree；γ: the soil body is indicated
Severe, unit: KN/m3；li: indicate the arc length of the bottom surface of soil i, unit: m；hi: indicate the height of soil i, unit: m；
bi: indicate the width of soil i, unit: m；θi: the native normal at bottom surface midpoint and the angle of cut of vertical line, unit: degree.
After a side slope determines, Slope Shape h, l, wherein h indicates the height of side slope, unit: m；L indicates side slope
The length on bottom edge, unit: m；The type λ of soil is just it has been determined that and coefficient of stability K is exactly about variable soil body cohesive strength c, list
Position: Kpa, soil body internal friction angleFunction.
The side slope soil body is sampled, and then can derive soil body cohesive strength c, soil according to the methods of triaxial compression test
Internal angle of frictionWith the abstract function of moisture content ω are as follows: c=F1(ω),So as to derive that side slope is steady
Abstract function between qualitative COEFFICIENT K and moisture content ω are as follows:
In soil the circulation path of electric current it is general there are three types of, be respectively: native pore water circulation path, soil particle circulation path
With the circulation path being threaded to form by Tu Shui.When soil moisture content is carried out close to when being saturated, electric current generally passes through pore water
Conduction, the unsaturation soil body is along soil particle and native water corporate conductive.The resistance and soil particle of side slope, water, three kinds of electrolyte of air have
It closes, derives side slope electricalresistivityρ and moisture content further according to the relationship of resistance and resistivity according to three parallel resistance rate models
Function between ω are as follows:
ρs: indicate the resistivity of pure soil, unit: Ω m, ρω: indicate the resistivity of water, unit: Ω m, ρ 'ω: it indicates
The density of water, unit: Kg/m3, ds: it indicates the specific gravity of the soil body, ω: indicating the moisture content of the soil body, ρ ': indicating the density of the soil body, it is single
Position: Kg/m3。
It is assigned to stability factor of slope and defines limit value 1.1,1.2,1.3, it is calculated by formula (2) and defines moisture content ω01,
ω02, ω03, moisture content will be defined and bring formula (3) into, solve and define electricalresistivityρ01, ρ02, ρ03, then pass through Ohm's law solution
Out-of-bounds constant current I01, I02, I03, the monitoring of Slope Stability, the side slope based on electric-resistivity method are realized by the variation of monitoring current
Unstability early warning system, which is established, to be completed.
2. the operating mechanism of early warning system
When side slope is in state of limit equilibrium, buckling safety factor K=1.0.So if the safety system of the side slope of reality
Number K > 1.0, then side slope is able to satisfy stability requirement.But in practical projects, because influence slope stability influence factor compared with
For complexity, although some side slopes reach K > 1.0, it is also possible that coming down.This also indicates that the property of the soil body is extremely complex
, for the sake of security, safety factor of slope K value is greater than 1.0, stablizes minimum safety factor circular arc according to building slope
Sliding scale, the K value of level-one side slope are 1.30, and the K value of second level side slope is 1.20, and the K value of three-level side slope is 1.10.For
One intelligence control system is not only needed to guarantee its normal work, be can guarantee with greater need for the accuracy for guaranteeing its early warning and then
Personal safety as well as the property safety before landslide.For the sake of security with guarantee accurately early warning, K=1.25 is brought into resistance and stability of slope
In the relation function of property coefficient, calculates solution and obtain critical resistance R0.It is not higher than 36V according to human safety voltage, gives early warning
The voltage rating U of system0< 36V, in Ohm's lawUnder, obtain Limiting current I0。
Using computer programming, critical breakdown electric current I is given0If the electric current I > I measured0, then side slope is in landslide early warning
State；If I < I0, then side slope is in a safe condition.
Further, the early warning that can will also be come down according to the size for obtaining electric current I is divided into following grade, the corresponding K of electric current
Value is greater than 1.25 side slopes and is in the state that is perfectly safe, and it is pre- that the corresponding K value of electric current side slope between 1.1~1.25 is in level-one unstability
Alert state, the corresponding K value of electric current side slope between 1.0~1.1 is in second level unstability alert status, when the corresponding K value of electric current is small
Side slope is in three-level unstability alert status when 1.0, and such alert status higher grade, and slope instability is bigger, when reaching three
Side slope unstability when grade unstability alert status, in this way can the risk more accurately to landslide be classified.
3. the electrode arrangement of early warning system
A kind of device of the slope stability early warning based on electric-resistivity method, including battery, cathode electrode, anode electrode, electric current
Meter and PCL control device and alarm unit, as shown in Figure 1, anode electrode 3 connects the anode of battery 1, cathode electrode 2 connects electricity
The cathode in pond 1, cathode electrode 2, anode electrode 3 are inserted into the soil property of side slope 4 to be measured, galvanometer A be connected to battery anode or
Cathode, for measuring the resistance of side slope to be measured, PCL controller (not shown) connects the galvanometer, and PCL controls device company
Unit taking alarm, the electric current that PCL controller obtains galvanometer are higher than preset value, and starting alarm unit is alarmed.Wherein, it is adopted
Electrode is normal electrode: copper electrode, has many advantages, such as high-strength, corrosion-resistant, and each pair of electrode can effectively cover 60m2, in order to true
It is accurate to protect the data measured, is 8 meters between positive and negative electrode, using being circular layout, multiple anodes constitute annular, and center is cathode,
Its electrode plane arrangement as shown in Fig. 2, θ expression be negative,For anode.All anodes are to be arranged in parallel, under multianode arrangement
There are also the effects of electric osmose reinforcing soft soil for electrode, and soil body compression strength can be improved and make entire soil body compression strength relatively uniform,
Therefore anode should be used in periphery, cathode in intermediate arrangement the arrangement mode of annular electrode, further, anode can
8 are set as, each pair of detecting electrode configures constant voltage 30V, continuous to be powered.
It can be equipped with temperature sensor between the anode and anode electrode of battery, temperature sensor and anode electrode are connected
It connects, when temperature is more than 270 DEG C of controllable temperature, can be controlled by temperature controller and automatically cut off the power switch.
Further, device further includes transformer, and transformer is connect with battery, controls voltage, is in early warning stage voltage
Voltage can be adjusted to 100V by transformer when wanting the side slope soil body to be reinforced, be drained, reinforced by 30V.
As needed can to stability factor of slope K distinguish assignment 1.1,1.2,1.3, according to function (2) correspondence find out boundary
Determine moisture content ω01, ω02, ω03, then will define moisture content ω01, ω02, ω03It brings function (3) corresponding find out into and defines resistance
Rate ρ01, ρ02, ρ03, electric current I is finally defined according to corresponding find out of Ohm's law01, I02, I03；Using galvanometer to monitoring current
Change the preset value for obtaining the electric current setting of galvanometer by PCL controller to detect the variation of stability factor of slope, into
Row early warning, such as when electric current reaches I01When, three-level early warning is carried out, when electric current reaches I02When, second level early warning is carried out, when electric current reaches
I03When, carry out level-one early warning.
Embodiment 2
Liaoning Province's slight slope soil sample is taken, research shows that the soil sample is clay, measures the soil sample with triaxial compression test
Origin cohesion c=89.0kp, internal friction angleThe slight slope measured slight slope height be 20m, slope ratio is approximately 1:
2, severe is γ=18.0KN/m.li: indicate the arc length of the bottom surface of soil i, bi: indicate the width of soil i, θi: in native bottom surface
The normal of point and the angle of cut of vertical line, find out minimum safety factor for slopes K=3.30 by formula (1) according to Swedish slice, i.e.,
Slight slope initial factor of safety K=3.30.It is solved by the relationship of above-mentioned formula (2) stability factor of slope K and moisture content ω
Moisture content is ω=15.1% at this time.Slight slope at this time is solved by the relationship of above-mentioned formula (3) slight slope electricalresistivityρ and moisture content ω
Resistivity is the Ω m of ρ=88.3, then measuring electric current by Ohm's law is 0.00076A.
Slope stability system is taken to improve the safety stock of early warning system using the side slope prior-warning device of above-mentioned offer
Number K value is calculated for 1.3, by moisture content ω=31.4% of formula (2) the counted soil body, is obtained by formula (3) pre-
Alert resistivity is the Ω m of ρ=61.2, then the output electric current being obtained by calculation at this time should be 0.0018A.
Stability factor of slope K value is taken to be calculated for 1.25, the moisture content by formula (2) counted soil body is
36.7%, obtaining early warning resistivity by formula (3) is 57.9, then the output electric current being obtained by calculation at this time is 0.0021A.
Taking stability factor of slope K value is 1.1 to be calculated, by the moisture content 43.2% of formula (2) the counted soil body,
Obtaining early warning resistivity by formula (3) is 51.2, then the output electric current being obtained by calculation at this time is 0.0026A.
It is that comparison is safe when the device of slope stability early warning of the setting based on electric-resistivity method measures electric current less than 0.0018A.
When measuring electric current is 0.0018A, belong to level-one side slope, the preset value that PCL controller is set is right as 0.0018A
A kind of alert ring tone should be set, such as drop sound, interval time long progress early warning, explanation is level-one side slope, carries out level-one early warning.
When measuring electric current is 0.0018A~0.0021A, belong to second level side slope, the preset value that PCL controller is set is model
0.0018A~0.0021A is enclosed, a kind of alert ring tone is set, such as drips drop sound, very briefer, interval time short carry out early warning, explanation is
Second level side slope carries out second level early warning.
It is 0.0021A~0.0026A when measuring electric current, belongs to three-level side slope, the preset value that PCL controller is set is range
0.0021A~0.0026A sets another alert ring tone, and if jingle the tinkle of bells has interruption to carry out early warning, explanation is three-level side slope,
Carry out three-level early warning.
When measuring electric current is greater than 0.0026A, belong to danger grade side slope, the preset value of PCL controller setting is greater than
0.0026A sets another alert ring tone, and if jingle the tinkle of bells clank sound uninterruptedly carries out early warning, explanation is relatively danger grade, to be removed
From.
Simulated atmosphere precipitation, uniform precipitation, when slope instability, measuring moisture content at this time is 53.1%, and resistivity is
47.2 Ω m, electric current I0=0.0032A.In conclusion when moisture content reaches ω=31.4%, the Ω of ρ=61.2 m, I0=
When 0.0018A, system starts early warning, meets the requirements.
The above described is only a preferred embodiment of the present invention, being not the limitation for doing other forms to the present invention, appoint
What those skilled in the art can use the equivalence enforcement that technology contents disclosed above were changed or be modified as equivalent variations
Example.But without departing from the technical solutions of the present invention, according to the technical essence of the invention to the above embodiments
What simple modification, equivalent variations and remodeling, still falls within the protection scope of technical solution of the present invention.
Claims (10)
1. a kind of method of the slope instability early warning based on electric-resistivity method, which is characterized in that it includes the following steps:
The stability of S1, analysis of slope obtain the function (1) of the stability factor of slope K of side slope soil sample,
S2, the side slope soil body are sampled, and derive soil body cohesive strength c, soil body internal friction angle according to triaxial compression test methodWith the abstract function of moisture content ω are as follows: c=F1(ω),To obtain stability factor of slope K and moisture content
Function (2) between ω；It further solves and obtains moisture content ω；
S3, according to the relationship of resistance and resistivity, derive the function (3) obtained out between side slope electricalresistivityρ and moisture content ω, ask
Solution obtains electricalresistivityρ；
The stability factor of slope K that S4, step S1 are obtained is greater than 1.5 and illustrates stability of slope；Set stability factor of slope K as
1.05 being three-level slope project when~1.15；It is that second level slope project is when K is 1.30~1.50 when K is 1.15~1.29
Level-one slope project；
S5, to stability factor of slope K distinguish assignment 1.05~1.15,1.15~1.29,1.30~1.50, according to function (2)
It finds out and defines moisture content ω01, ω02, ω03, then will define moisture content ω01, ω02, ω03It brings function (3) into and finds out and define electricity
Resistance rate ρ01, ρ02, ρ03, finally found out according to Ohm's law and define electric current I01, I02, I03, realize and pass through the variation to monitoring current
The variation of stability factor of slope is detected, when electric current reaches I01When, three-level early warning is carried out, when electric current reaches I02When, carry out two
Grade early warning, when electric current reaches I03When, carry out level-one early warning.
2. the method as described in claim 1, which is characterized in that in step sl, the function of the stability factor of slope K
(1) shown in following formula,
Wherein, c: indicating the cohesive strength of the soil body,The internal friction angle for indicating the soil body, γ: indicates the severe of the soil body, li: indicate soil
The arc length of the bottom surface of i, hi: indicate the height of soil i, bi: indicate the width of soil i, θi: the normal at native bottom surface midpoint with
The angle of cut of vertical line.
3. the method as described in claim 1, which is characterized in that in step s 2, stability factor of slope K and moisture content ω it
Between function (2) as follows,
4. the method as described in claim 1, which is characterized in that in step s3, out between side slope electricalresistivityρ and moisture content ω
Function (3) as follows,
ρs: indicate the resistivity of pure soil, ρω: indicate the resistivity of water, ρ 'ω: indicate the density of water, ds: indicate the specific gravity of the soil body,
ω: it indicates the moisture content of the soil body, ρ ': indicating the density of the soil body.
5. the method as described in claim 1, which is characterized in that in step s 4, set stability factor of slope K as 1.12
When, it is three-level slope project；It is second level slope project when K is 1.25, is level-one slope project when K is 1.3.
6. the method as described in claim 1, which is characterized in that in step s 5, distinguish assignment to stability factor of slope K
1.1,1.2,1.3, moisture content ω is defined according to function (2) corresponding find out01, ω02, ω03, then will define moisture content ω01,
ω02, ω03It brings function (3) corresponding find out into and defines electricalresistivityρ01, ρ02, ρ03, electricity is finally defined according to corresponding find out of Ohm's law
Flow I01, I02, I03, the variation by detecting stability factor of slope to the variation of monitoring current is realized, when electric current reaches I01
When, three-level early warning is carried out, when electric current reaches I02When, second level early warning is carried out, when electric current reaches I03When, carry out level-one early warning.
7. a kind of device of the slope stability early warning based on electric-resistivity method, which is characterized in that it includes battery, cathode electrode, sun
Pole electrode, galvanometer and PCL controller and alarm unit, the anode of the anode electrode connection battery, the cathode electrode connect
Connect the cathode of battery, the cathode electrode, anode electrode are inserted into the soil property of side slope to be measured, the galvanometer be connected to anode or
Cathode, for measuring the resistance of side slope to be measured, the PCL controller connects the galvanometer, and the PCL controls device connection report
Alert unit, the electric current that the PCL controller obtains galvanometer are higher than preset value, and starting alarm unit is alarmed.
8. device as claimed in claim 7, which is characterized in that the anode electrode is copper electrode, and the cathode electrode is copper
Electrode, the anode electrode are set as multiple, and the anode electrode forms circular ring shape, the anode electrode and yin around cathode electrode
The distance of pole electrode is 8 meters.
9. device as claimed in claim 7, which is characterized in that described device further includes temperature sensor, the temperature sensing
Device is connected to the anode of battery, and when the temperature of the temperature sensor measurement is higher than setting value, temperature controller control is cut automatically
Power off switch.
10. device as claimed in claim 7, which is characterized in that described device further includes transformer, and transformer and power supply connect
It connects, controls voltage, be 30V in early warning stage voltage, it, can be by transformer by voltage tune when wanting the side slope soil body to be reinforced
100V is saved, is drained, is reinforced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811428084.3A CN109300282B (en) | 2018-11-27 | 2018-11-27 | Method and device for early warning of slope instability based on resistance method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811428084.3A CN109300282B (en) | 2018-11-27 | 2018-11-27 | Method and device for early warning of slope instability based on resistance method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109300282A true CN109300282A (en) | 2019-02-01 |
| CN109300282B CN109300282B (en) | 2020-12-25 |
Family
ID=65143277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811428084.3A Expired - Fee Related CN109300282B (en) | 2018-11-27 | 2018-11-27 | Method and device for early warning of slope instability based on resistance method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109300282B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870484A (en) * | 2019-02-27 | 2019-06-11 | 东北大学 | A kind of aqueous slope instability early warning system and method |
| CN117607398A (en) * | 2024-01-23 | 2024-02-27 | 昆明理工大学 | Prediction method for critical water content of instability of gravel soil slope |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9465022B2 (en) * | 2011-11-23 | 2016-10-11 | Tsinghua University | Method for real-time on-line monitoring of concrete freeze-thaw damage |
-
2018
- 2018-11-27 CN CN201811428084.3A patent/CN109300282B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9465022B2 (en) * | 2011-11-23 | 2016-10-11 | Tsinghua University | Method for real-time on-line monitoring of concrete freeze-thaw damage |
Non-Patent Citations (4)
| Title |
|---|
| 刘纪峰 等: "含水率对边坡土性及其稳定性的影响", 《河南科技大学学报：自然科学版》 * |
| 孙文怀 等: "《工程地质与岩土力学》", 28 February 2002, 中央广播电视大学出版社 * |
| 饶运章: "《岩土边坡稳定性分析》", 31 January 2012, 长沙：中南大学出版社 * |
| 龚晓楠 等: "粘性土的电阻计算模型", 《沈阳工业大学学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870484A (en) * | 2019-02-27 | 2019-06-11 | 东北大学 | A kind of aqueous slope instability early warning system and method |
| CN117607398A (en) * | 2024-01-23 | 2024-02-27 | 昆明理工大学 | Prediction method for critical water content of instability of gravel soil slope |
| CN117607398B (en) * | 2024-01-23 | 2024-04-12 | 昆明理工大学 | Prediction method for critical water content of instability of gravel soil slope |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109300282B (en) | 2020-12-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107919666B (en) | Regional power grid transient stability online comprehensive prejudgment method based on wide area response | |
| CN108629520B (en) | Method for evaluating running state of high-voltage transmission line in microclimate environment | |
| CN206892025U (en) | A kind of device based on electric capacity conductance principle measurement crude oil water content | |
| CN106119897A (en) | A kind of electrolyzer electric flow distribution and safety monitoring system and electrolytic aluminium equipment | |
| CN109300282A (en) | A kind of method and apparatus of the slope instability early warning based on electric-resistivity method | |
| CN102231220B (en) | Detection method of fire disaster class | |
| CN106405280B (en) | A kind of intelligent substation on-line monitoring parameter trend method for early warning | |
| CN104914144A (en) | Hydrogen concentration on-line monitoring device used for nuclear power plants | |
| CN108629118B (en) | Windproof monitoring method, device and system for transmission tower structure | |
| CN105929334A (en) | All-vanadium redox flow battery positive electrolyte state of charge measurement method | |
| CN106709149B (en) | A kind of aluminium cell three-dimensional burner hearth shape real-time predicting method neural network based and system | |
| CN105894706B (en) | A kind of forest fire prediction technique and its system | |
| CN208187477U (en) | It is a kind of for monitoring the contactless device of drainage pipeline networks flow | |
| CN104573192B (en) | Online monitoring method for equivalent icing thickness of overhead line strain tower | |
| CN108828332A (en) | A method of calculating lightning location system detection efficient | |
| CN206270487U (en) | Unmanned plane flow measuring system | |
| CN108362926A (en) | A kind of voltage class recognition methods and device | |
| CN104831317B (en) | Method for judging abnormal anode current of aluminum electrolysis cell | |
| CN206388308U (en) | A kind of automation foundation supervising device based on the Big Dipper | |
| CN207487764U (en) | A kind of equipment for fire cistern water level monitoring | |
| CN208270706U (en) | The insulation detection device and manned underwater vehicle of manned underwater vehicle | |
| CN206248166U (en) | A kind of water-level measuring post of portable type measuring level of ground water | |
| CN105806434A (en) | System for measuring flow of open channel | |
| CN105893743A (en) | Transmission line standard ice thickness calculation method based on meteorological station | |
| CN205721283U (en) | A kind of telesecurity monitoring system of transmission tower |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201225 Termination date: 20211127 |