CN109461359A - A kind of aqueous geological structure forward probe method in tunnel - Google Patents
A kind of aqueous geological structure forward probe method in tunnel Download PDFInfo
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Abstract
The embodiment of the present invention discloses a kind of aqueous geological structure forward probe method in tunnel.It is related to Tunnel Engineering construction technique field, can be used in the aqueous geological structure detection theoretical research in tunnel and engineering practice, to instruct the construction in tunnel.It include: according to aqueous architectonic specific type building geological model；It lays to survey on the geological model and sets route；The different geological model conditional parameters for receiving user's input, simulate different aqueous geological structures；Route, which is set, using the survey surveys the aqueous architectonic apparent resistivity value set under different condition parameter；Apparent resistivity curve figure under the conditions of being drawn described in view according to the apparent resistivity value；Determine whether tunnel tunnel face front is aqueous according to the apparent resistivity curve figure.The present invention is suitable for carrying out tunnel tunnel face front aqueous geological structure detection forecast and its theoretical research is analyzed.
Description
Technical field
The present invention relates to the aqueous geological structure forward probe sides in Tunnel Engineering construction technique field more particularly to a kind of tunnel
Method.
Background technique
With the quickening of infrastructure construction in china process and the implementation of energy strategy, in traffic, water conservancy and hydropower, mine etc.
Field will build more major long tunnels (tunnel) engineering.It is faced with prominent (gushing) water in these engineering constructions, prominent (gushing) mud, collapses
Many high risk geological disasters such as side.Prominent discharge disaster has become the bottleneck problem of the underground engineering constructions such as tunnel construction, the palm
How source of the geological structure containing water guide of side as geological disasters such as prominent water bursts in face of son carries out it detecting becoming and urgently grind
The important problem studied carefully and solved.
Currently used geologic prediction method can be divided into geological analysis method and geophysical exploration method.Geological analysis method is one
Kind macroscopical prediction method, forecast precision are lower；And the seismic reflection class method in geophysical exploration means is to tomography, solution cavity etc.
Whether geological structure has preferable Effect on Detecting, but can not verify wherein aqueous.
For this purpose, being badly in need of carrying out theoretical research to the aqueous geological structure in tunnel, and provide a kind of suitable for the aqueous geology in tunnel
The forward probe method of construction, to instruct the construction in tunnel.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of aqueous geological structure forward probe method in tunnel, can not only fit
For in the aqueous geological structure detection theoretical research in tunnel, additionally it is possible to the engineering practice for the aqueous geological structure detection in tunnel
In, to instruct the construction in tunnel.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that
On the one hand, the embodiment of the present invention provides a kind of aqueous geological structure forward probe method in tunnel, comprising steps of
Geological model is constructed according to aqueous architectonic specific type；
It lays to survey on the geological model and sets route；
The different geological model conditional parameters for receiving user's input, simulate different aqueous geological structures；The condition
Parameter includes distance of the power supply point source to measuring electrode one end；
Route, which is set, using the survey surveys the aqueous architectonic apparent resistivity value set under different condition parameter；
Apparent resistivity curve figure under the conditions of being drawn described in view according to the apparent resistivity value；
Determine whether tunnel tunnel face front is aqueous according to the apparent resistivity curve figure.
Preferably, the aqueous architectonic specific type include: tomography, fragmented rock body water-bearing zone, crack water-bearing zone,
Crack shape solution cavity, spherical shape or elliposoidal solution cavity；
It is described according to aqueous architectonic specific type building geological model include: by tomography, fragmented rock body water-bearing zone,
Crack water-bearing zone and crack shape solution cavity, are configured to the slab construction with a thickness of 1m~4m；And/or
The spherical or elliposoidal solution cavity is configured to the sphere structure that diameter is 0.5~3m.
Preferably, on the geological model lay survey set route comprising steps of
Tunnel cavity is simulated in front of the geological model, the spatial relation of the tunnel cavity and geological model is
Vertical or inclination intersection；
It moves towards three-dimensional along tunnel and arranges that a plurality of survey line on bottom plate or abutment wall, carries out more survey line measurement in space；
Supply terminals source electrode is fixed on motionless at face, another pole opposite with source electrode is arranged infinite from face
It is fixed at a distance；
Potential difference meter is set on survey line, the measuring electrode at potential difference meter both ends is moved along survey line to acquire the number of measuring point
According to the data include the potential value of measuring point；Wherein the distance between measuring electrode is constant.
Preferably, the conditional parameter further include: aqueous architectonic type, quantity and the space bit with tunnel cavity
Set relationship；
It is described to set route survey using the survey and set the aqueous architectonic apparent resistivity value under different condition parameter and include:
Determine aqueous architectonic type, quantity and the spatial relation with tunnel cavity；
If it is determined that aqueous geological structure is individually vertical with tunnel cavity tomography, crushed zone or crack shape solution cavity；
Geological model and cloth are constructed according to aqueous architectonic type, quantity and with the spatial relation of tunnel cavity
If survey line；
Specifically include: one tunnel cavity of building is to simulate tunnel, the electricalresistivityρ of the tunnel cavity3=1 × 106 Ω
.m, single slab construction is set in tunnel cavity front vertical to simulate tomography, crushed zone or crack shape solution cavity, tunnel cavity with
The intersection location of face is set as origin, lays survey line, origin to institute on tunnel cavity bottom middle line since the origin
The distance for stating slab construction is set as d；
D value is adjusted, the apparent resistivity curve of node is obtained；
Determining apparent resistivity according to the apparent resistivity curve, no there are minimums；
Minimum if it exists, then judge whether the minimum is less than outlier threshold, and the outlier threshold is 2800 Ω .m；
If being less than the outlier threshold, it is determined that front of tunnel heading is aqueous.
Preferably, it is described using the survey set route and survey set aqueous architectonic apparent resistivity under different condition parameter
Include: after value
Determine that exceptional value present in apparent resistivity value is single or multiple；The exceptional value is fluctuation in one group of data
The biggish value of amplitude；
If the exceptional value be it is single, using data utilize the round and smooth processing technique rejecting abnormalities apparent resistivity value of data；
If multiple, then along one ERT survey line of arrangement of measuring-line；
Anomalous body is detected using the ERT survey line, the resistivity value of each anomalous body is obtained by 3-d inversion；It is described different
Geology when normal body includes the geological structure containing interfering bodies information and front of tunnel heading water content and contains only interfering bodies information
Construction；
The apparent resistivity data value after removal interference is acquired according to formula；
The apparent resistivity data value calculation formula are as follows:
ρ s removal=ρ s interferes the pure tunnel * ρ s/pure interference of ρ s；ρ s removal is the apparent resistivity data after removal interference；ρs
Interference is the apparent resistivity data containing interfering bodies information and when front of tunnel heading water content；The pure interference of ρ s is to contain only interfering bodies
Resistivity data when information；The pure tunnel ρ s refers to the apparent resistivity prospecting data due to caused by tunnel cavity merely.
The aqueous geological structure forward probe method in tunnel provided in an embodiment of the present invention, by according to aqueous architectonic
Specific type constructs geological model；It lays to survey on the geological model and sets route；Receive the different Geological Models of user's input
Type conditional parameter simulates different aqueous geological structures；The conditional parameter include power point source to measuring electrode one end away from
From；Route, which is set, using the survey surveys the aqueous architectonic apparent resistivity value set under different condition parameter；According to the view electricity
Apparent resistivity curve figure under the conditions of values of resistivity drafting view is described；It is determined in face of tunnel face according to the apparent resistivity curve figure
Whether side is aqueous, can be applied not only in the aqueous geological structure detection theoretical research in tunnel, additionally it is possible to aqueously for tunnel
In the engineering practice of matter structural exploration, to instruct the construction in tunnel.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the aqueous one embodiment flow diagram of geological structure forward probe method in tunnel of the embodiment of the present invention；
Fig. 2 is a geological model structural schematic diagram in the embodiment of the present invention；
Fig. 3 sets route for survey in figure and lays planar structure schematic diagram on the geological model；
Fig. 4 is another geological model structural schematic diagram in the embodiment of the present invention；
Fig. 5 is another geological model structural schematic diagram in the embodiment of the present invention；
Fig. 6 is another geological model structural schematic diagram in the embodiment of the present invention；
Fig. 7 is the apparent resistivity curve figure that one embodiment of the invention obtains；
Fig. 8 is the apparent resistivity curve figure that another measuring point obtains in Fig. 7；
Fig. 9 is the apparent resistivity curve figure that yet another embodiment of the invention obtains；
Figure 10 is the apparent resistivity curve figure that yet another embodiment of the invention obtains
Figure 11 is that a survey sets route arrangement schematic diagram in the embodiment of the present invention；
Figure 12 is the inversion result that ERT survey line detects interfering bodies.
Specific embodiment
The embodiment of the present invention is described in detail with reference to the accompanying drawing.
It will be appreciated that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment, shall fall within the protection scope of the present invention.
Fig. 1 is the aqueous geological structure forward probe method flow schematic diagram in tunnel of the embodiment of the present invention.Referring to Fig. 1, this hair
A kind of bright aqueous geological structure forward probe method in tunnel of embodiment, be suitable for the aqueous geological structure of tunnel tunnel face front into
Row detection forecast and its theoretical research analysis.The described method includes:
Step 101 constructs geological model according to aqueous architectonic specific type；
In the present embodiment, as an alternative embodiment, the aqueous architectonic specific type includes: tomography, is crushed
Rock mass water-bearing zone, crack water-bearing zone, crack shape solution cavity, spherical shape or elliposoidal solution cavity；
It is described according to aqueous architectonic specific type building geological model include: by tomography, fragmented rock body water-bearing zone,
Crack water-bearing zone and crack shape solution cavity, are configured to the slab construction with a thickness of 1m~4m；And/or by described spherical or ellipsoid
Shape solution cavity is configured to the sphere structure that diameter is 0.5~3m.
Step 102, laying surveys and sets route on the geological model；
Referring to shown in figure, in the present embodiment, it is to be understood that laid on geological model survey set route after just form ground electricity
Model.Specifically, it lays to survey on the geological model and sets route comprising steps of simulating tunnel chamber in front of the geological model
Body, the tunnel cavity is vertical with the spatial relation of geological model or inclination is intersected；
It moves towards three-dimensional along tunnel and arranges a plurality of survey line on bottom plate or abutment wall, carry out more survey line measurement in space (is in diagram
More survey line solid layout stractures are not provided)；
Supply terminals source electrode A is fixed on it is motionless at face, by opposite with source electrode another pole B setting from face without
It is poor fixed at a distance；
Potential difference meter is set on survey line, the measuring electrode M and N at potential difference meter both ends is moved along survey line to acquire measuring point
Data, the data include the potential value of measuring point；Wherein the distance between measuring electrode M and N is constant.
Step 103 sets route using the survey and surveys and sets aqueous architectonic apparent resistivity value under different condition parameter；
In the present embodiment, shown apparent resistivity is the parameter that resistivity method is used to reflect rock and the variation of ore electric conductivity.
It is indicated with symbol ρ s.There are the resistivity measured in the case where a variety of rocks with resistivity method in geology, are not a certain rocks
The true resistivity of stone.Its distribution (including-a little structure in addition to by the combined influence of various rock resistivities, also with rock, ore
Make factor), the concrete conditions such as electrode arrangement it is related, so it is referred to as apparent resistivity.
Step 103, the different geological model conditional parameters for receiving user's input, simulate different aqueous geological structures；
The conditional parameter includes distance of the power supply point source to measuring electrode one end.
Step 104 sets route using the survey and surveys and sets aqueous architectonic apparent resistivity value under different condition parameter.
Step 105, the apparent resistivity curve figure according to apparent resistivity value drafting view under the conditions of described；
Step 106 determines whether tunnel tunnel face front is aqueous according to the apparent resistivity curve figure.
In the present embodiment, as an alternative embodiment, the conditional parameter further include: aqueous architectonic type, number
Amount and the spatial relation with tunnel cavity；It, can be in carrying out tunnel aqueous geological structure detection experimental study or practice
Different geological models are constructed according to the type of the water-bearing structure, quantity and from the positional relationship of tunnel cavity, with true
Tunnel geology structural environment is simulated, to provide reason for detection of the complicated and diversified aqueous geological structure in tunnelling works
By research model.
It is described to set route survey using the survey and set the aqueous architectonic apparent resistivity value under different condition parameter and include:
Determine aqueous architectonic type, quantity and the spatial relation with tunnel cavity；
In the present embodiment, aqueous architectonic type, quantity and with the spatial relation in tunnel according to syntagmatic
Can there are many, in the present embodiment, choose wherein typical several aqueous architectonic detection methods and carry out analytic explanations, ginseng
See shown in Fig. 2 to 6, typical aqueous geological structure include: front of tunnel heading there are single or multiple it is vertical with tunnel cavity or
There are the tomography, crushed zone or crack shape solution cavity and spheres for inclined tomography, crushed zone or crack shape solution cavity, front of tunnel heading
Or the aqueous geological structure that ellipsoid solution cavity coexists.
If it is determined that aqueous geological structure is individually vertical with tunnel cavity tomography, crushed zone or crack shape solution cavity；
Geological model and cloth are constructed according to aqueous architectonic type, quantity and with the spatial relation of tunnel cavity
If survey line；
Referring to Fig. 2, Fig. 3, shown, specifically include: one tunnel cavity of building is to simulate tunnel, the electricity of the tunnel cavity
Resistance rate ρ3=1 × 106 Ω .m, in tunnel, single slab construction is arranged to simulate tomography, crushed zone or crack in cavity front vertical
The intersection location of shape solution cavity, tunnel cavity and face is set as origin, since the origin on tunnel cavity bottom middle line
Survey line is laid, the distance of origin to the slab construction is set as d；D value is adjusted, apparent resistivity curve (Fig. 7 and the figure of node are obtained
8 be the apparent resistivity curve figure under two groups of different parameters values in table 1)；Apparent resistivity is determined according to the apparent resistivity curve
It is no that there are minimums；Minimum if it exists, then judge whether the minimum is less than outlier threshold, and the outlier threshold is 2800
Ω.m；If being less than the outlier threshold, it is determined that front of tunnel heading is aqueous.
Table 1
For there are the operating condition of multiple tomographies vertical with tunnel cavity, crushed zone or crack shape solution cavity, determination is
The aqueous method in no front is essentially identical, the difference is that the geological model and outlier threshold of building are different, in this kind of operating condition
Under, outlier threshold is 1500 Ω .m.
For there are multiple operating conditions with the inclined tomography of tunnel cavity, crushed zone or crack shape solution cavity, the geology of building
For model as shown in figure 4, under this kind of operating condition, outlier threshold is 2500 Ω .m.
In the present embodiment, in order to verify under the operating condition of the inclined tomography of tunnel cavity, crushed zone or crack shape solution cavity, depending on
Relationship between resistivity curve amplitude size and the position of front of tunnel heading water content devises one group in detection process
With the comparative test under the operating condition of the inclined tomography of tunnel cavity, crushed zone or crack shape solution cavity, in this experiment, in tunnel
Four surveys line have been laid in water-bearing structure geological model, wherein survey line one is nearest from water content, and survey line four is farthest from water content,
The apparent resistivity value for measuring every survey line can be seen referring to shown in Fig. 9 according to the apparent resistivity curve that the apparent resistivity value is drawn
Out, the data exception response of survey line one is more apparent, and apparent resistivity curve amplitude changes greatly；The curve that survey line four measures is gradually more
Gently, it reaches unanimity substantially, data exception is accordingly unknown, and the variation of apparent resistivity curve amplitude is small；Apparent resistivity amplitude as a result,
Change it is small, then it is remote apart from water content, it is corresponding nearby.
Referring to shown in Fig. 5, as an alternative embodiment, for the geology of water-bearing cave and the building of fault combination forward probe
Model is as follows: the radius of solution cavity is 2m, the parameter of tomography are as follows: ρ 1=3000 Ω .m, lx=ly=24m, lz=2.0m, ρ 2=10
Ω .m, the ρ 1 are the resistivity of tunnel surrounding, and the ρ 2 is the resistivity of solution cavity and/or tomography, and described lx, ly and lz are disconnected
The length and width and thickness of layer model.In tunnel, cavity bottom arranges that 2 surveys line, survey line one are closer than two exsolution hole of survey line.Figure 10 is
The apparent resistivity curve figure measured observes data to this compared with the data of aforementioned single solution cavity or single tomography forward probe
The response of the two combination is more sensitive.Survey line one is abnormal more obvious than survey line two, the former is closer away from solution cavity, electric field distortion at this
It is larger；And the latter away from solution cavity farther out, electric field distortion is smaller.In addition, when tomography than solution cavity closer to face when, data are to this
The response of geology combination is almost the same with the response of single tomography, shows tomography extremely and can cover its rear (z-axis negative direction) to contain
Water anomalies over caves, this is unfavorable for the discovery of tomography rear water-bearing cave, thus, it is desirable to the removal interference in detection.
As an alternative embodiment, it is described using the survey set route and survey set aqueous geological structure under different condition parameter
Apparent resistivity value after comprise determining that exceptional value present in apparent resistivity value be it is single or multiple；The exceptional value is one
In group data, the biggish value of fluctuating range；If the exceptional value be it is single, picked using data using the round and smooth processing technique of data
Except abnormal apparent resistivity value；If multiple, then along one ERT survey line of arrangement of measuring-line；Anomalous body is visited using the ERT survey line
It surveys, the resistivity value of each anomalous body is obtained by 3-d inversion；The anomalous body includes containing before interfering bodies information and face
The geological structure of square water content and geological structure when containing only interfering bodies information；The view electricity after removal interference is acquired according to formula
Resistance rate data value；The apparent resistivity data value calculation formula are as follows: ρ s removal=ρ s interferes the pure tunnel * ρ s/pure interference of ρ s；ρ s is gone
Except for removal interference after apparent resistivity data；ρ s interference is the view electricity containing interfering bodies information and when front of tunnel heading water content
Resistance rate data；The pure interference of ρ s is resistivity data when containing only interfering bodies information；The pure tunnel ρ s refers to merely due to tunnel chamber
Apparent resistivity prospecting data caused by body.
In the present embodiment, in order to verify the validity of multiple anomalous bodies interference minimizing technology, devises and interfered containing side
Earth-electricity model (shown in Figure 11), tunnel cavity exists below tomography interfering bodies.Model parameter are as follows: ρ 1=10 Ω .m, ρ 2=
3000 Ω .m, d=10m, lx=16m, lz=1m.1., 2., 3. the distance away from face is respectively 10m, 17m, 24m to anomalous body,
Top is 3m away from tunnel floor distance, in a z-direction with a thickness of 1m, the length on the direction x is 12m, and the length on the direction y is
2m, resistivity are 800 Ω .m.The variation that tracing pattern occurs when 3 anomalous bodys exist simultaneously is complex.Using ERT the bottom of to
Plate abnormal conditions below detection, obtains bottom plate resistivity structure below by 3-d inversion, by anomalous body from inversion result
In extract, as shown in figure 12, inversion result is almost the same with actual conditions.Ratio method is recycled, it will be different from former data
Chang Tigan disturbs abnormal removal, and the data after discovery removal are coincide substantially with the data without interference, as shown in Figure 10.As a result,
The interference in tunnel water-bearing structure detection can be effectively removed through the above scheme, to guarantee the accuracy of measurement.
The present embodiment additionally provides a kind of tunnel three-dimensional total space forward probe physical experiments bench frame apparatus, shown platform
Frame includes chan frame, is formed by assembling a plurality of steel plates, and having a size of wide 2m × high 2m × long 4.5m, inner surface applies insulated paint with mould
Quasi- high resistant boundary.Shown water-bearing structure uses representative water-bearing fault, is located at immediately ahead of face, having a size of high 2.0m
× wide 2.0m × thickness 0.2m, occurrence is upright, moves towards vertical with tunnel axis.Tunnel cavity is using high-intensitive high resistivity PVC material
Material, section are semicircle, outer diameter 0.15m, length 3.2m.Arrangement of measuring-line is in tunnel floor, length 2.50m；It is selected glutinous
Soil is used as country rock material, and the electricalresistivityρ 1 of country rock is a fixed value, about 200 Ω .m；Filling of the quartz sand as water-bearing structure
Material, the resistivity of water-bearing structure are a changing values, simulate different resistivity value by the moisture content changed in water-bearing structure
Water-bearing structure.It is filled the water step by step into tomography, acquire data after water filling every time, to study in the case of different waters respectively
Whether off-note or the verifying foregoing detection method detection result for observing data are reliable.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (5)
1. a kind of aqueous geological structure forward probe method in tunnel, which is characterized in that comprising steps of
Geological model is constructed according to aqueous architectonic specific type；
It lays to survey on the geological model and sets route；
The different geological model conditional parameters for receiving user's input, simulate different aqueous geological structures；The conditional parameter
Distance including power supply point source to measuring electrode one end；
Route, which is set, using the survey surveys the aqueous architectonic apparent resistivity value set under different condition parameter；
Apparent resistivity curve figure under the conditions of being drawn described in view according to the apparent resistivity value；
Determine whether tunnel tunnel face front is aqueous according to the apparent resistivity curve figure.
2. the method according to claim 1, wherein the aqueous architectonic specific type include: tomography,
Fragmented rock body water-bearing zone, crack water-bearing zone, crack shape solution cavity, spherical shape or elliposoidal solution cavity；
Described according to aqueous architectonic specific type building geological model includes: by tomography, fragmented rock body water-bearing zone, crack
Water-bearing zone and crack shape solution cavity, are configured to the slab construction with a thickness of 1m~4m；And/or
The spherical or elliposoidal solution cavity is configured to the sphere structure that diameter is 0.5~3m.
3. setting route including walking the method according to claim 1, wherein laying and surveying on the geological model
It is rapid:
Tunnel cavity is simulated in front of the geological model, the tunnel cavity is vertical with the spatial relation of geological model
Or inclination intersection；
It moves towards three-dimensional along tunnel and arranges that a plurality of survey line on bottom plate or abutment wall, carries out more survey line measurement in space；
Supply terminals source electrode is fixed on motionless at face, another pole opposite with source electrode is arranged from face infinite point
It is fixed；
Potential difference meter is set on survey line, the measuring electrode at potential difference meter both ends is moved along survey line to acquire the data of measuring point,
The data include the potential value of measuring point；Wherein the distance between measuring electrode is constant.
4. the method according to claim 1, wherein the conditional parameter further include: aqueous architectonic kind
Class, quantity and the spatial relation with tunnel cavity；
It is described to set route survey using the survey and set the aqueous architectonic apparent resistivity value under different condition parameter and include:
Determine aqueous architectonic type, quantity and the spatial relation with tunnel cavity；
If it is determined that aqueous geological structure is individually vertical with tunnel cavity tomography, crushed zone or crack shape solution cavity；
According to aqueous architectonic type, quantity and geological model is constructed with the spatial relation of tunnel cavity and lays survey
Line；
Specifically include: one tunnel cavity of building is to simulate tunnel, the electricalresistivityρ of the tunnel cavity3=1 × 106 Ω .m,
Single slab construction is arranged to simulate tomography, crushed zone or crack shape solution cavity, tunnel cavity and area in tunnel cavity front vertical
The intersection location in face is set as origin, lays survey line on tunnel cavity bottom middle line since the origin, and origin is put down to described
The distance of hardened structure is set as d；
D value is adjusted, the apparent resistivity curve of node is obtained；
Determining apparent resistivity according to the apparent resistivity curve, no there are minimums；
Minimum if it exists, then judge whether the minimum is less than outlier threshold, and the outlier threshold is 2800 Ω .m；
If being less than the outlier threshold, it is determined that front of tunnel heading is aqueous.
5. the method according to claim 1, wherein the utilization survey, which sets route survey, sets different condition parameter
Under aqueous architectonic apparent resistivity value after include:
Determine that exceptional value present in apparent resistivity value is single or multiple；The exceptional value is fluctuating range in one group of data
Biggish value；
If the exceptional value be it is single, using data utilize the round and smooth processing technique rejecting abnormalities apparent resistivity value of data；
If multiple, then along one ERT survey line of arrangement of measuring-line；
Anomalous body is detected using the ERT survey line, the resistivity value of each anomalous body is obtained by 3-d inversion；The anomalous body
Geological structure when including the geological structure containing interfering bodies information and front of tunnel heading water content and containing only interfering bodies information；
The apparent resistivity data value after removal interference is acquired according to formula；
The apparent resistivity data value calculation formula are as follows:
ρ s removal=ρ s interferes the pure tunnel * ρ s/pure interference of ρ s；ρ s removal is the apparent resistivity data after removal interference；ρ s interference
For the apparent resistivity data containing interfering bodies information and when front of tunnel heading water content；The pure interference of ρ s is to contain only interfering bodies information
When resistivity data；The pure tunnel ρ s refers to the apparent resistivity prospecting data due to caused by tunnel cavity merely.
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| CN201811373896.2A CN109461359A (en) | 2018-11-16 | 2018-11-16 | A kind of aqueous geological structure forward probe method in tunnel |
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