CN108415092A - A kind of deep-well geoelectric survey electrode assembly and preparation method and application - Google Patents
A kind of deep-well geoelectric survey electrode assembly and preparation method and application Download PDFInfo
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Abstract
The invention discloses a kind of deep-well geoelectric survey electrode assembly and preparation method and application, device includes stereotype cylinder (1), right cylinder pipe (2), lifting rope (3) and measures line (4)；The stereotype cylinder (1) is rolled into tubular by stereotype and is placed on right cylinder pipe (2) outside contact surface equipped with electroconductive binder, bonding forms main cylinder, and the upper and lower ends of right cylinder pipe (2) are shorter than stereotype cylinder (1) upper and lower ends；Stereotype joining place is on one side to infolding welding section (5)；Welding measures line (4) in the welding section (5)；The high L in side and the proportionate relationship of bottom edge perimeter S of stereotype cylinder (1) be：The lifting rope (3) is set to main cylinder axle center, and lower end is divided into three or more ends and is fixed on main cylinder top.Preparation method is simple, can shield the environmental disturbances of earth's surface so that observation data reliability increases, and also simplifies occupation of land and the device maintenance work of earth's surface.Suitable for physical quantity observations such as long-term ground electricity；Performance is stablized, permanent durable, greatly reduces the regular maintenance cost of traditional electrode.
Description
Technical field
The present invention relates to frame for movement technical field more particularly to a kind of deep-well geoelectric survey electrode assembly and preparation methods
And application.
Background technology
Earthquake electric observation technology be a kind of measurement method more mature in current earthquake monitoring and forecasting, the object of observation
Reason amount is that ball medium apparent resistivity and natural potential difference change with time.The observation procedure used is powered for four-electrode method
Power supply by power pole to underground for direct current, measure supply current intensity and measure the potential difference of interpolar artificial electric field, then count
Calculate apparent resistivity.Commonly observation electrode assembly was that stereotype or solid nonpolarizing electrode carry out earth's surface and bury in the past, that is, was digged pit
1.5-2 meters of embedded unpolarizable electrodes or tiling stereotype electrode, but this operation processing is dry by earth surface planting object and ground surface environment
That disturbs is affected.Currently, earthquake electricity observation because developed by urban construction, ground surface environment interference, especially earth's surface
The interference of free electron is increasingly severe, and the reliability for observing data substantially reduces, at the same there is also electric leakage, it is pareira hit, easily by
The problems such as electromagnetic interference, power supply are difficult and need to often demarcate.
In earthquake geoelectric survey, influence accuracy of observation because being known as two major classes, one kind is to survey area and the environment on periphery is dry
Influence is disturbed, one kind is the influence of apparatus system.It is when the selectively electricity observation station, as possible far from dry to avoid environmental disturbances
Source is disturbed, therefore the most observation station is all built in suburb or mountain area.But with the sprawling of urban construction, survey area periphery economy
Development, most earth's surfaces the interference that is subject to of the electricity observation station be on the rise, most notably subway and stray electrical current is dry
It disturbs so that the discreteness for observing data becomes larger, and the manifestation of dishonesty such as amplitude of diurnal variation and annual variation amplitude distortion occurs in observation curve, even
So that normal signal can not be differentiated among being submerged in interference.The drastically decline of the observation quality of data causes some stations to have to
It moves or stops surveying.Apparatus system influences many because being known as of accuracy of observation, and important is the effect of leakage of observation circuit and observations
Data wander and variation caused by system is unstable.This requires the quality of the line of observation and electrode is good, ensure observation device system
The stability of system does not generate electric leakage etc..For these disturbing factors, ground electrician author has done many researchs in terms of different,
Also certain effect is achieved.We research and the experimental results showed that the ground connection of electrode assembly has different seek with geoelectric survey
Normal substantial connection.Current method is to improve supply current to increase the measurement of potential difference, but this can not infinitely increase, no
To then harm be brought to surrounding enviroment and crowd.
Deep-well electricity observation be the current new observed pattern for solving problem above, but existing electrode is with cannot be satisfied deep-well
The technology requirement of electricity observation.
Invention content
The object of the present invention is to provide a kind of deep-well geoelectric survey electrode assemblies, and preparation method is simple, can shield
The environmental disturbances of earth's surface so that observation data reliability increases, and also simplifies occupation of land and the device maintenance work of earth's surface.It is suitable for
The physical quantity observations such as long-term ground electricity；Performance is stablized, permanent durable, greatly reduces the regular maintenance cost of traditional electrode.
The purpose of the present invention is what is be achieved through the following technical solutions：
A kind of deep-well geoelectric survey electrode assembly, including stereotype cylinder 1, right cylinder pipe 2, lifting rope 3 and measurement line 4；
The stereotype cylinder 1 is rolled into tubular by stereotype and is placed on 2 outside contact surface of right cylinder pipe equipped with electroconductive binder, bonds shape
At main cylinder, the upper and lower ends of right cylinder pipe 2 are shorter than 1 upper and lower ends of stereotype cylinder；Stereotype joining place is on one side to infolding welding section 5；
Welding measures line 4 in the welding section 5；
The high L in side and the proportionate relationship of bottom edge perimeter S of stereotype cylinder 1 be：
The lifting rope 3 is set to main cylinder axle center, and lower end is divided into three or more ends and is fixed on main cylinder top.
The welding section 5 is evenly distributed with four pads 41 from the bottom to top, and a master is respectively welded in two of which pad 41
With two core wires for measuring line 4, another primary two core wires for measuring line 4 are respectively welded in another two pad 41.
After the completion of the welding of measurement line 4 epoxy resin protective layer is smeared on 41 surface of pad and periphery.
The width T of the welding section 5 is 8-10 centimetres.
The upper and lower ends of the right cylinder pipe 2 are shorter than at least 1 centimetre of 1 upper and lower ends of stereotype cylinder.
A kind of preparation method of deep-well geoelectric survey electrode assembly, including：
Step A：The measurement request of according to deep-well electricity observation calculates the contact area in lead electrode and soil, that is, lead
The lateral area M of plate cylinder 1；
Step B：According to the lateral area M of stereotype cylinder 1, the high L in side and bottom edge perimeter S of stereotype cylinder 1 are calculated, and is met：
Step C：Select thickness for 3~5 centimetres of metallic lead plate material, impurity content is less than 3%；Rectangle stereotype is cut out,
Height is L, and length S+T, T are 8~10 centimetres；
Step D：Line 4 is measured in the vertical uniform welding of one 2.5~4 centimeters of short side inner distance edge of rectangle stereotype；
Step E：The stereotype that welding is measured to one side of line 4 carries out doubling, and the stereotype width of doubling is 8~10 centimetres；
Step F：Electroconductive binder is uniformly smeared on the inside of stereotype, electroconductive binder thickness is no more than 0.5 centimetre, then will
It is outer at stereotype cylinder 1, overall structure main cylinder that stereotype winding is placed on right cylinder pipe 2；And the upper and lower ends of right cylinder pipe 2 are shorter than stereotype cylinder
At least 1 centimetre of 1 upper and lower ends；
Step G：Apart from 3~4 centimeters of main cylinder top edge, 3 or 4 lacing holes 31 are uniformly circumferentially opened, lifting rope 3 is taken to set
In main cylinder axle center, 3 lower end of lifting rope is divided into 3 or 4, and end is fixed in lacing hole 31.
The step D includes：4 pads 41 vertically are uniformly arranged, two of which pad 41 is respectively welded one
Another primary two core wires for measuring line 4 are respectively welded in primary two core wires for measuring line 4, another two pad 41.
The step D includes：It measures 41 surface of pad and periphery after the completion of line 4 welds and smears epoxy resin protection
Layer, the thickness of protective layer are the 1/2~1/3 of solder thickness, and 41 periphery extension size of pad is 0.3~0.5 centimetre.
A kind of deep-well geoelectric survey method is measured using above-mentioned deep-well geoelectric survey electrode assembly.
As seen from the above technical solution provided by the invention, a kind of deep-well geoelectric survey provided in an embodiment of the present invention
Electrode assembly, preparation method is simple, can shield the environmental disturbances of earth's surface so that observation data reliability increases, also simple
Occupation of land and the device maintenance work of earth's surface are changed.Deep-well earthquake electricity observe its electrode buried depth after can shorten observation pole span, this
By the thorny problem that electricity observation takes up a large area with greatly suppressing environmental disturbances and earth's surface, observation efficiency significantly improves.It is applicable in
In physical quantity observations such as long-term ground electricity；Performance is stablized, permanent durable, greatly reduces the regular maintenance cost of traditional electrode.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the structural schematic diagram for the deep-well geoelectric survey electrode assembly that the embodiment of the present invention one provides；
Fig. 2 is the welding section structural schematic diagram for the deep-well geoelectric survey electrode assembly that the embodiment of the present invention one provides；
Fig. 3 is the setting area positional structure schematic diagram for the deep-well geoelectric survey electrode assembly that the embodiment of the present invention one provides；
Fig. 4 is the structural schematic diagram of the application for the deep-well geoelectric survey electrode assembly that the embodiment of the present invention three provides；
Fig. 5 is the schematic diagram of the application for the deep-well geoelectric survey electrode assembly that the embodiment of the present invention three provides.
Specific implementation mode
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on this
The embodiment of invention, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, belongs to protection scope of the present invention.
The embodiment of the present invention is described in further detail below in conjunction with attached drawing.
Embodiment one
As shown in Figure 1, a kind of deep-well geoelectric survey electrode assembly, including stereotype cylinder 1, right cylinder pipe 2, lifting rope 3 and measurement line
4；The stereotype cylinder 1 is rolled into tubular by stereotype and is placed on 2 outside contact surface of right cylinder pipe equipped with electroconductive binder, and bonding forms main cylinder
Body, right cylinder pipe 2 uses plastic tube, such as polyvinylchloride pipe.Electroconductive binder, abbreviation conducting resinl are that one kind can effectively glue
Connect a variety of materials, and the adhesive of conductive energy.Specifically, conducting resinl can use filled-type, i.e., led by addition
Conductive fillers keep glue conductive, different by the type of conducting particles, can be divided into silver system conducting resinl, gold system conducting resinl, copper
It is conducting resinl and charcoal system conducting resinl.What is be most widely used is silver system conducting resinl.And glue can use epoxy resin, phenolic aldehyde tree
Fat, polyurethane etc..It is epoxy resin silver system conducting resinl that this example, which can be selected most widely used,.
The upper and lower ends of right cylinder pipe 2 are shorter than 1 upper and lower ends of stereotype cylinder；It is not indicated in figure, above and below the right cylinder pipe 2
Both ends are shorter than at least 1 centimetre of 1 upper and lower ends of stereotype cylinder.Right cylinder pipe 2 mainly plays support and connect, and increases Deep-well electrode
Itself from weight and ensure 1 shape of stereotype cylinder；The upper and lower ends of right cylinder pipe 2, which are shorter than 1 upper and lower ends of stereotype cylinder, can make electricity
The function part i.e. stereotype cylinder 1 of pole are well contacted with soil.
Stereotype joining place is on one side to infolding welding section 5；The effect of welding section 5 of infolding is to prevent pad 41 and measurement line 4
It contacts soil and generates further oxidation and corrosivity, influence measurement result.In this example, the width T of the welding section 5 is
8-10 centimetres.Welding measures line 4 in the welding section 5.In specific this example, the welding section 5 is evenly distributed with four from the bottom to top
A pad 41 can specifically measure line 4 and be generally two core wires in four pads 41 of height center area uniform design,
In two pads 41 primary two core wires for measuring line 4 are respectively welded, another master is respectively welded in another two pad 41
With two core wires for measuring line 4.Namely " master one is standby ", four pads 41 include two spare points.The size of pad 41
It is proportional, such as 41 a diameter of 2 centimetres of pad with the thickness of line 4 is measured, the diameter that welding measures line 4 is about 0.8 li
Rice.After the completion of the welding of measurement line 4 epoxy resin protective layer is smeared on 41 surface of pad and periphery.The thickness of protective layer
It is the 1/2~1/3 of solder thickness, 41 periphery extension size of pad is 0.3~0.5 centimetre, and protective layer effect is to ensure this dress
Prevent pad 41 from leaking electricity and being aoxidized while setting good conduction stability again.
5 infolding of welding section, makes its pad 41 be not directly contacted with air and soil, not will produce thus electrode electric leakage and
Oxidation, the stability enhancing of electrode.Welding temperature is also to influence the key factor of protective layer simultaneously, it can so that protective layer is permanent
It does not fall off, also ensures the stabilization of electrode, and permanent durable.
The high L in side and the proportionate relationship of bottom edge perimeter S of stereotype cylinder 1 be：Namely golden section
Than, this ratio it was proved that stability is high, ensure Deep-well electrode 1 shape of stereotype cylinder and contact surface stablize it is constant
Shape.
In this example, the lifting rope 3 is set to main cylinder axle center, and lower end is divided into three or more ends and is fixed on main cylinder
Portion.Specifically apart from 3~4 centimeters of main cylinder top edge, 3 or 4 lacing holes 31 are uniformly circumferentially opened, lifting rope 3 is taken to be set to master
Cylinder axle center, 3 lower end of lifting rope are divided into 3 or 4, and end is fixed in lacing hole 31.It is to take 3 or 4 root long degree identical in practice
Connecting rope, one end are individually fixed in lacing hole 31, and the other end converges at main cylinder axle center, and 3 lower end of connection lifting rope ensures to hang
Rope 3 is set to main cylinder axle center.It is 4 connecting ropes in this example, 4 lacing holes 31, usual 3 connecting ropes, 3 lacing holes 31 are
It can.Certainly, 4 designs are to have prevented 1 disconnected, main cylinder disequilibrium.Specifically, in this example, main cylinder one week
It is even to make a call to 4 lacing holes 31, with the fixed main cylinder of the lifting rope 3 of corrosion resistance perforation, it is embedded in underground, the lifting rope 3 in 2 meters of earth's surface
Carry out protection against rodents insect bite processing.
Embodiment two
A kind of preparation method of deep-well geoelectric survey electrode assembly, it is with particularly preparing the deep-well described in embodiment one electric
Measuring electrode device, including：
Step A：The measurement request of according to deep-well electricity observation calculates the contact area M in lead electrode and soil, that is,
The lateral area M of stereotype cylinder 1；
In the art, method there are many contacts area in stereotype cylinder 1 and soil is calculated, belongs to known technology, no
It repeats one by one again, the method used in this example is calculated according to formula (1)：
In formula：
R, ground resistance does grounding, and ground resistance R≤30 according in nation-building standard to aerial cable requirement
Ω, therefore, electric observation overhead transmission line deep buried electrode needs to meet ground resistance requirement in earthquake construction specification；This formula is applicable in
It is embedded in electrode in uniform soil, if having underground water or sandstone etc. in the wellhole of deep buried electrode, segmentation is needed to calculate
Ground resistance selects maximum value to meet the requirements, for calculating；
ρ, soil earth resistivity, can by when the station advanced exploration of ground radio station obtained by the practical measurement of four-electrode method；It is for this patent
The constant known；
L, the length of stereotype cylinder 1；As shown in Figure 3；For ease of calculation.It can select L=1m or 1.5m；
D, 1 diameter of stereotype cylinder；As shown in Figure 3；
H, distance of the ground to 1 midpoint of stereotype cylinder；Namely electrode buried depth depth, as shown in Figure 3；It can pass through when starting
Calculate gained；It is known constant for this patent；
The value that d can be found out with formula above takes the value of minimum d, then contact area minimum will meet：
Contact area M=π × d × L.
Meanwhile according to the thickness of 1 stereotype of stereotype cylinder, then, and 1 mass of stereotype cylinder：
The thickness of the density of thickness × lead of G=M × stereotype, stereotype is generally 3~5 centimetres；
Minimum 1 mass G of stereotype cylinder can be calculatedmin。
Meanwhile the contact area M of lead electrode and soil will also meet formula (2)：
G, the weight (or quality) of stereotype cylinder 1；
F, the buoyancy in slurry mixture of the stereotype cylinder 1 in deep-well drilling；
F, stereotype cylinder 1 is conducted oneself with dignity falling bodies frictional force with slurry mixture during decline in deep-well drilling；
F+f ≈ mud densities × g × h in single slurry mixture.G is gravity acceleration parameter, and h is stereotype cylinder 1
Dead weight falling bodies depth.Here deep-well geoelectric survey electrode assembly is actually being built in application, first has to be drilled with embedded electrode
Deep-well, deep-well drilling depth and bore diameter are selected according to the specification and construction requirements of electrode assembly, belong to well known technology, no
It repeats again.After boreholes drilling depth is more than design-calculated depth, extreme position will be fallen under electrode using dead weight falling bodies principle
It no longer falls, depth at this time is the dead weight falling bodies depth h of stereotype cylinder 1, is then fixed.In actually drilling, mostly
Area is since the buried depth of underground water is very shallow, and there are mud in drilling, and as depth increases, and the density of mud is also increasing,
Gravel etc. is sometimes also mixed, can be segmented and be calculated, is averaged, segmentation is more, as a result more accurate.
Here mass G is calculatedminAfterwards, the quality G calculated further according to formula (1)min, take the larger of formula (1) and (2)
Value, then calculate the contact area M of stereotype cylinder 1 and soil：
M=G/ (density of thickness × lead of stereotype), the thickness of stereotype is generally 3~5 centimetres；
Subsequent design requirement can be met.
Step B：According to the lateral area M of stereotype cylinder 1, the high L in side and bottom edge perimeter S of stereotype cylinder 1 are calculated, and is met：Namely golden section, this ratio ensure the lead of Deep-well electrode it was proved that stability is high
Stablizing for 1 shape of plate cylinder and contact surface is indeformable.
Step C：It selects thickness for 3~5 centimetres of metallic lead plate material, is used during being calculated in specific selecting step A
Thickness, it is desirable that impurity content be less than 3%, have better conductivity；Rectangle stereotype is cut out, is highly L, length S+T, T 8
~10 centimetres.
Step D：Line 4 is measured in the vertical uniform welding of one 2.5~4 centimeters of short side inner distance edge of rectangle stereotype；
Specifically, being vertically uniformly arranged 4 pads 41, primary two cores for measuring line 4 are respectively welded in two of which pad 41
Another primary two core wires for measuring line 4 are respectively welded in line, another two pad 41.This region is exactly welding section 5, also
It is that the welding section 5 is evenly distributed with four pads 41 from the bottom to top, it specifically can be in four welderings of height center area uniform design
Contact 41 measures line 4 and is generally two core wires, and primary two core wires for measuring line 4 are respectively welded in two of which pad 41, separately
Another primary two core wires for measuring line 4 are respectively welded in two pads 41.Namely " master one is standby ", four pads 41 wrap
Containing two spare points.The size of pad 41 and the thickness for measuring line 4 are proportional, such as 41 a diameter of 2 centimetres of pads,
The diameter that welding measures line 4 is about 0.8 centimetre.
In addition, measuring 41 surface of pad and periphery after the completion of line 4 welds smears epoxy resin protective layer, the thickness of protective layer
Degree is the 1/2~1/3 of solder thickness, and 41 periphery extension size of pad is 0.3~0.5 centimetre.Protective layer effect is to ensure this
Prevent pad 41 from leaking electricity and being aoxidized while device good conduction stability again.
Step E：The stereotype that welding is measured to one side of line 4 carries out doubling, forms welding section 5, the stereotype width T of doubling
It is 8~10 centimetres；The effect of welding section 5 of infolding is to prevent pad 41 and measure the contact soil of line 4 and generate further oxygen
Change and corrosivity, influence measurement result.5 infolding of welding section makes its pad 41 be not directly contacted with air and soil, thus not
It will produce electrode electric leakage and oxidation, the stability enhancing of electrode.Welding temperature is also to influence the key factor of protective layer simultaneously, it
Can protective layer not fallen off for a long time, also ensure the stabilization of electrode, and permanent durable.
Step F：Electroconductive binder is uniformly smeared on the inside of stereotype, electroconductive binder thickness is no more than 0.5 centimetre, then will
It is outer at stereotype cylinder 1, overall structure main cylinder that stereotype winding is placed on right cylinder pipe 2；And the upper and lower ends of right cylinder pipe 2 are shorter than stereotype cylinder
At least 1 centimetre of 1 upper and lower ends；The upper and lower ends of right cylinder pipe 2 are shorter than the function part that 1 upper and lower ends of stereotype cylinder can make electrode
Namely stereotype cylinder 1 is well contacted with soil.
Step G：Apart from 3~4 centimeters of main cylinder top edge, 3 or 4 lacing holes 31 are uniformly circumferentially opened, lifting rope 3 is taken to set
In main cylinder axle center, 3 lower end of lifting rope is divided into 3 or 4, and end is fixed in lacing hole 31.It is 4 connecting ropes in this example, 4 are worn
Cord hole 31, usual 3 connecting ropes, 3 lacing holes 31.Certainly, 4 designs are to have prevented 1 to break, and main cylinder loses
Balance.Specifically, in this example, uniformly 4 lacing holes 31 are made a call within one week in main cylinder, with the fixed master of the perforation of lifting rope 3 of corrosion resistance
Cylinder is embedded in underground, and the lifting rope 3 in 2 meters of earth's surface will carry out protection against rodents insect bite processing.
Embodiment three
A kind of deep-well geoelectric survey method, using the deep-well described in embodiment one electrical measurement during deep-well geoelectric survey
Amount electrode assembly measures.Its measurement method has no difference with existing mode, and feature is to apply described in embodiment one
Deep-well geoelectric survey electrode assembly.
In use, deep-well geoelectric survey electrode assembly is carried out dead weight falling bodies using the own wt of lifting rope 3 and main cylinder
Lifting rope 3 is fixed in buried depth underground after reaching fixed position.And this deep-well geoelectric survey electrode can be concatenated according to measurement request to be made
With being specifically shown in Fig. 4.Dead weight falling bodies effect be ensure electrode conduct oneself with dignity falling bodies to buried depth position, and steadily in the long term, it is indeformable not move
Position.
The deep-well for being drilled with embedded electrode, deep-well drilling depth and bore diameter are first had to according to the specification of electrode assembly and is built
If it is required that selection, belongs to well known technology, repeats no more.After boreholes drilling depth is more than design-calculated depth, dead weight is utilized
Falling bodies principle will fall on extreme position under deep-well geoelectric survey electrode assembly and no longer fall, and depth at this time is conducted oneself with dignity for stereotype cylinder 1
Falling bodies depth h, is then fixed.In actually drilling, most area exists since the buried depth of underground water is very shallow in drilling
Mud, and as depth increases, the density of mud is also increasing, sometimes also mixes gravel etc., can be segmented into
Row calculates, and is averaged, and segmentation is more, as a result more accurate.
Freely falling body is defined as not by any resistance, only the object that lands under the effect of gravity.Such as make in terrestrial gravitation
The object to fall by stationary state under.Overhead near earth surface is considered as constant gravitational field.If do not considered
Atmospheric drag, the movement of falling object in the area is uniformly accelrated rectilinear motion.Its acceleration is constantly equal to gravity acceleration g.
Although the gravitation and object of the earth square are inversely proportional to earth center distance, the radius of the earth is passed through much larger than freely falling body
The distance crossed, so gravitation is considered as constant in Near Ground, the acceleration of freely falling body is a constant constant.
It is the uniformly accelrated rectilinear motion that initial velocity is zero.
The calculation formula of the instantaneous velocity of freely falling body is v=gt, and the calculation formula of displacement is △ s=(1/2) * gt2,
In, △ s are distance increments, and g is acceleration of gravity (for g=9.8m/s2), and t is the time of object fall.
Usual aerial freely falling body is known as falling bodies of conducting oneself with dignity, with the increase of dead weight falling speed, air pair
The resistance of falling bodies also gradually increases.Air drag F suffered by the object that vertical air fallsAir dragWith the density p of airAir, object
Effective cross section product W, whereabouts rate vUnderIt is square directly proportional, the size of resistance is represented by FAir drag=C × ρAir×W×
vUnder×vUnder, wherein C is resistance coefficient, generally between 0.2~0.5, ρ=1.2kg/m3, object fall will be through after a period of time will
Up at the uniform velocity, this is known as ultimate rate.Deep-well electricity observation electrode embedded using dead weight falling bodies principle, the power that electrode is subject to
For gravity itself, by air drag during whereabouts, and the frictional force with the generations such as underground water, soil and rock
Deng, and resistance and frictional force change during object fall with speed, the size of depth.Due to being a change with joint efforts
Amount, therefore the distance of fall for falling bodies of conducting oneself with dignity is a complicated function, needs to be calculated with calculus pattern function.And it is different
Underground medium, damped coefficient and calculation formula needs adjust.This belongs to the well known technology of this field, need not be described in detail.
In addition, deep-well electricity observation in the electrode depth of burying and observation pole span not only to consider ground interference effect, also want
Consider the observation quality of underground.Common method is that three-dimensional finite element numeric value analysis calculates, i.e., if earth resistivity is surveyed zoning
It is divided into arbitrary N blocks region, each piece of Region Medium resistivity is ρi, i=1,2 ..., N, earth resistivity ρaIt is each Region Medium
The function of resistivity：
△ ρ in most casesi/ρi<<1, therefore above formula is subjected to Taylor's Taylor series expansions, ignore second order and high-order
, the opposite variation of earth resistivity can be expressed as the weighted sum of the opposite variation of each Region Medium resistivity：
B in formulaiIt is referred to as influencing coefficient
Meet condition：
First we assume that measurement pole span is certain, calculating different electrode depth observation influences coefficient curve, it is further assumed that electricity
Profound degree is certain, and calculating different observation pole span observation influences coefficient curve, and then selection influences the best Observational depth of coefficient
Laying pole span in being built as ground electricity observation with observation pole span and the electrode depth of burying.Such as result of calculation shown in fig. 5, most
Selectively electricity observes circuit polar distance of supplying power AB=300m afterwards, measures pole span MN=100m, electrode buried depth depth H=100m.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art is in the technical scope of present disclosure, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (9)
1. a kind of deep-well geoelectric survey electrode assembly, which is characterized in that including stereotype cylinder (1), right cylinder pipe (2), lifting rope (3) and survey
Measure line (4)；
The stereotype cylinder (1) is rolled into tubular by stereotype and is placed on right cylinder pipe (2) outside contact surface equipped with electroconductive binder, bonds shape
At main cylinder, the upper and lower ends of right cylinder pipe (2) are shorter than stereotype cylinder (1) upper and lower ends；Stereotype joining place is welded to infolding on one side
Area (5)；Welding measures line (4) in the welding section (5)；
The high L in side and the proportionate relationship of bottom edge perimeter S of stereotype cylinder (1) be：
The lifting rope (3) is set to main cylinder axle center, and lower end is divided into three or more ends and is fixed on main cylinder top.
2. deep-well geoelectric survey electrode assembly according to claim 1, which is characterized in that the welding section (5) is under
Primary two core wires for measuring line (4) are respectively welded in supreme uniformly distributed four pads (41), two of which pad (41), separately
Another primary two core wires for measuring line (4) are respectively welded in two pads (41).
3. deep-well geoelectric survey electrode assembly according to claim 2, which is characterized in that measurement line (4) welding
After the completion epoxy resin protective layer is smeared on pad (41) surface and periphery.
4. deep-well geoelectric survey electrode assembly according to claim 1,2 or 3, which is characterized in that the welding section (5)
Width T be 8-10 centimetres.
5. deep-well geoelectric survey electrode assembly according to claim 1,2 or 3, which is characterized in that the right cylinder pipe (2)
Upper and lower ends be shorter than at least 1 centimetre of stereotype cylinder (1) upper and lower ends.
6. a kind of preparation method of deep-well geoelectric survey electrode assembly, which is characterized in that including：
Step A：The measurement request of according to deep-well electricity observation calculates the contact area in lead electrode and soil, that is, stereotype cylinder
(1) lateral area M；
Step B：According to the lateral area M of stereotype cylinder (1), the high L in side and bottom edge perimeter S of stereotype cylinder (1) are calculated, and is met：
Step C：Select thickness for 3~5 centimetres of metallic lead plate material, impurity content is less than 3%；Rectangle stereotype is cut out, height
For L, length S+T, T are 8~10 centimetres；
Step D：Line (4) is measured in the vertical uniform welding of one 2.5~4 centimeters of short side inner distance edge of rectangle stereotype；
Step E：The stereotype that welding is measured to one side of line (4) carries out doubling, and the stereotype width of doubling is 8~10 centimetres；
Step F：Electroconductive binder is uniformly smeared on the inside of stereotype, electroconductive binder thickness is no more than 0.5 centimetre, then by stereotype
Winding is placed on right cylinder pipe (2) outside at stereotype cylinder (1), is integrally formed main cylinder；And the upper and lower ends of right cylinder pipe (2) are shorter than stereotype
At least 1 centimetre of (1) upper and lower ends of cylinder；
Step G：Apart from 3~4 centimeters of main cylinder top edge, 3 or 4 lacing holes (31) are uniformly circumferentially opened, lifting rope (3) is taken to set
In main cylinder axle center, lifting rope (3) lower end is divided into 3 or 4, and end is fixed in lacing hole (31).
7. the preparation method of deep-well geoelectric survey electrode assembly according to claim 6, which is characterized in that the step
D includes：Vertical be uniformly arranged 4 pads (41), a primary line (4) that measures is respectively welded in two of which pad (41)
Another primary two core wires for measuring line (4) are respectively welded in two core wires, another two pad (41).
8. the preparation method of deep-well geoelectric survey electrode assembly according to claim 7, which is characterized in that the step
D includes：It measures pad (41) surface and periphery after the completion of line (4) welds and smears epoxy resin protective layer, the thickness of protective layer
It is the 1/2~1/3 of solder thickness, pad (41) periphery extension size is 0.3~0.5 centimetre.
9. a kind of deep-well geoelectric survey method, which is characterized in that deep using any one described in claim 1,2,3,4 or 5
Well geoelectric survey electrode assembly measures.
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| CN111724662A (en) * | 2020-07-14 | 2020-09-29 | 云南电网有限责任公司电力科学研究院 | Soil environment electric leakage simulation system and method |
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