CN107356668A - A kind of detection method of safety of dam body identification - Google Patents
A kind of detection method of safety of dam body identification Download PDFInfo
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- G01N29/043—Analysing solids in the interior, e.g. by shear waves
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- G—PHYSICS
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/02—Generating seismic energy
- G01V1/143—Generating seismic energy using mechanical driving means, e.g. motor driven shaft
- G01V1/147—Generating seismic energy using mechanical driving means, e.g. motor driven shaft using impact of dropping masses
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- G—PHYSICS
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
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- G01V1/20—Arrangements of receiving elements, e.g. geophone pattern
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
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Abstract
The present invention relates to reservoir safety technical field, discloses a kind of detection method of safety of dam body identification, wherein, the detection method includes：Determine the detection range of dam body；Geophysical exploration is carried out in detection range, to determine the distribution of anomalous body on dam body；Experiment is sampled to the anomalous body of dam body after flood season and analyzes the physical parameter of the sample；Distribution, type and the potential safety hazard of anomalous body are judged by above-mentioned physical prospecting result and/or physical parameter.The detection method of the present invention determines the distribution of anomalous body on dam body using the method for physical prospecting, and the then position exploration again to exception samples and to sampling test, secure authentication is carried out to dam body according to test data and exploration result.Pass through above-mentioned technical proposal, the precision and efficiency of detection can be improved, and a wide range of exploration to dam body can be avoided, reduce quantities, improve detection efficiency and the degree of accuracy, additionally it is possible to avoid and damaged because punching sampling on a large scale on dam body caused by dam body.
Description
Technical field
The present invention relates to reservoir safety technical field, in particular it relates to a kind of detection of safety of dam body identification
Method.
Background technology
China's dangerously weak reseroirs quantity is big and ratio is high.According to preliminary prospecting result, the whole nation there are about dangerously weak reseroirs three
More than ten thousand, account for the 36% of reservoir sum.The presence of a large amount of dangerously weak reseroirs, have a strong impact on its Xing Li that controls flood
The performance of benefit and the development of national economy.In recent years, Strengthening Projects of Dangerous Reservoirs increasingly mentions center
Come with the important agenda of local governments at various levels.
But because most of potential safety hazard of dangerously weak reseroirs is all more hidden, if conventionally entering
Row prospecting, it is difficult to make the identification of overall scientific to the safety of reservoir.One kind how is built technically may be used
Row, the duration is fast, quality is good, the rational surveying method of cost, for reservoir safety identify provide reliably according to
According to being a very significant and practical job.
In reservoir safety validation phase, conventional way is using inspection information, adjusts poor reservoir log
The methods of, the position of potential safety hazard for suspection be present, a small amount of drilling and test pit can only be arranged after flood season,
Its surveys can not truly reflect the potential safety hazard of dangerously weak reseroirs comprehensively, cause frequent change during construction to set
Meter scheme, not only increase construction investment, and extend the construction period, have a strong impact on the normal fortune of reservoir
OK.
The content of the invention
It is an object of the invention to provide a kind of detection method of safety of dam body identification, the detection method utilizes thing
The method of spy realizes the lossless exploration to dam body.
To achieve these goals, the present invention provides a kind of detection method of safety of dam body identification, wherein,
The detection method includes：Step 1：Determine the detection range of dam body；Step 2：In the detection range
Interior carry out geophysical exploration, to determine the distribution of anomalous body on dam body；Step 3：To dam after flood season
The anomalous body of body, which is sampled, tests and analyzes the physical parameter of the sample；Step 4：Pass through the step
The physical parameter of the two physical prospecting results obtained and/or step 3 judges that distribution, type and the safety of anomalous body are hidden
Suffer from.
Preferably, the detection range in step 1 is according to during data and the reservoir operation for establishing reservoir
Observational data, carry out comprehensive descision in conjunction with reconnaissance trip and investigation result and determine.
Preferably, the geophysical exploration in step 2 includes：Height is utilized first in the detection range
Density Seismic Imaging technology obtains the distribution situation of anomalous body in the plane；Then multi-channel Transient face is recycled
Wave technology obtains buried depth, thickness and the transverse wave speed of anomalous body.
Preferably, the application of the high density earthquake image technology includes：The institute according to determined by step 1
State detection range and first detector and the first shot point are set；In the first shot point explosive source, lead to
Cross the waveform that the first detector detects and records ripple caused by the focus；According to first detection
The distributing position of the Analysis of test results anomalous body of device in the plane.
Preferably, detected by the first detector and record the continuity of each waveform of lineups, frequency
The change of rate and amplitude energy.
Preferably, the application of the Multichannel Transient Surface Wave technology includes：According to the high density Seismic Imaging
Testing result, the second multi-channel Transient face is set in the distribution of identified anomalous body in the plane
Ripple sensing point and the second shot point；In the second shot point explosive source, pass through the second multiple tracks wink
The ripple sensing point detection of state face and the waveform for recording ripple caused by the focus；According to second multi-channel Transient
Buried depth, thickness and the transverse wave speed of the Analysis of test results anomalous body of face ripple sensing point.
Preferably, detected by the wave detector of the second Multichannel Transient Surface Wave sensing point 24 and record ground
The distributional pattern of each waveform of lineups in shake record, extract the frequency dispersion data of face ripple.
Preferably, in step 2,24 pounds of sledgehammer artificial excitation's focus are utilized.
Preferably, in step 4, by the wave character of the physical parameter of the anomalous body and lineups,
The surface wave velocity on stratum makees correlation analysis, asks for its corresponding relation, with this distribution to the anomalous body,
Type and potential safety hazard judge.
Preferably, in step 3, the physical parameter include clay content, compactness, particulate component,
Plasticity index.
Using geophysical exploration in the step of detection method of the safety of dam body identification of the present invention
Method determines the distribution of anomalous body on dam body, then determines that an abnormal position explore sampling and right again pair
Sample is tested, and secure authentication is carried out to dam body according to test data and exploration result.By upper
State technical scheme, it is possible to increase the precision and efficiency of detection, and can avoid surveying a wide range of of dam body
Visit, reduce quantities, improve detection efficiency and the degree of accuracy, additionally it is possible to avoid because big on dam body
Punch to scope sampling and damaged to caused by dam body.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing be for providing a further understanding of the present invention, and a part for constitution instruction, with
Following embodiment is used to explain the present invention together, but is not construed as limiting the invention.
In accompanying drawing：
Fig. 1 is the arrangement schematic diagram of the exploratory spot of dining hall in Buddhist temple reservoir dam slope according to embodiments of the present invention；
Fig. 2 is the high density Seismic Imaging and surface wave frequency dispersion curve of dining hall in Buddhist temple reservoir according to embodiments of the present invention
Figure；
Fig. 3 is the Multichannel Transient Surface Wave dispersion curve figure of dining hall in Buddhist temple reservoir according to embodiments of the present invention；
Fig. 4 is the Multichannel Transient Surface Wave uniform velocity profile of dining hall in Buddhist temple reservoir according to embodiments of the present invention.
Description of reference numerals
1 dam body；11 first detectors；12 first shot points；21 second Multichannel Transient Surface Waves detect
Point；22 second shot points；11 (12) first detectors and the first shot point coincidence point.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that
Embodiment described herein is merely to illustrate and explain the present invention, and is not limited to this hair
It is bright.
In the present invention, in the case where not making opposite explanation, the noun of locality used should combine specification
Suitably explain in direction in accompanying drawing and practical application.
The present invention provides a kind of detection method of safety of dam body identification, it is characterised in that the detection method bag
Include：
Step 1：Determine the detection range of dam body；
Step 2：Geophysical exploration is carried out in the detection range, to determine anomalous body on dam body
Distribution；
Step 3：Experiment is sampled to the anomalous body of dam body after flood season and analyzes the physics ginseng of the sample
Number；
Step 4：The physical prospecting result and/or the physical parameter of step 3 obtained by the step 2 judges
Distribution, type and the potential safety hazard of anomalous body.
Because the safety of reservoir dam has great influence for reservoir area downstream people life property safety.
Essentially consist in the position of the defects of dam body and other hidden danger detected for the secure authentication of dam,
And the problems such as clay cut-pff wall and filled soils, provided to optimize the design of the reinforcement of reservoir
Foundation.
But after reservoir builds up and come into operation, can be to the intensity of dam body if carrying out prospecting by boring on a large scale
Impact, therefore the invention provides a kind of method of the dam body Non-Destructive Testing to reservoir.
Technique according to the invention scheme, first, the detection range of dam body is determined in step 1.Here
Described detection range refers to the regional extent for finding and anomalous body being there may exist on dam body, possible to these
The regional extent that anomalous body be present further is detected, so as to accurately find anomalous body.
Preferably, the detection range in step 1 is according to during data and the reservoir operation for establishing reservoir
Observational data, carry out comprehensive descision in conjunction with reconnaissance trip and investigation result and determine.
Specifically, material is filled by collecting Reservoir Construction investigation result immediately and design drawing, construction time
Component and the data such as record, the observational record of reservoir runtime are rolled, in conjunction with reconnaissance trip and investigated
As a result carry out comprehensive descision, qualitative analysis reservoir safety hidden danger (such as differential settlement, collapse, make somebody a mere figurehead,
Leak paths etc.) existing for position, with this come determine detection scope.
Then, in step 2, geophysical exploration is carried out in the detection range, to determine dam body
The distribution of upper anomalous body.Geophysical exploration refers to the principle and method using physics, to the various of the earth
Physics field distribution and its change are observed, and detect dielectric structure, the material of earth body and terrestrial space
Composition, formed and developed, study relative various natural phenomenas and its changing rule.
Geophysical exploration (abbreviation physical prospecting) is generally used for geological exploration field, and the present invention innovatively will
Geophysical prospecting method is applied in the detection of the secure authentication of reservoir dam, so as to realize to the lossless of reservoir dam
Detection.While dam body accurate safety detection is realized, the infringement to dam body intensity is avoided, ensure that
The life-span of dam body.
In the detection range determined by step 1, physical prospecting is laid to the position that there may be potential safety hazard
Survey line.The spacing of exceptions area physical prospecting survey line suitably reduces, and in the selection of geophysical prospecting method, the application adopts
Geophysical prospecting method is mainly high density earthquake image technology and Multichannel Transient Surface Wave technology.
Because high density earthquake image technology is easy for construction in the wild, efficiency high, and visual results are detected,
The change of waveform can be directly observed at the scene, therefore first uses high density earthquake image technology.
Wherein, high density earthquake image technology is based on the optimum offset technology hair in seismic reflectuon seismic noise
A kind of Seismic Exploration Method that exhibition is got up.This method can both carry out seismic full-field row exploration,
It can be explored according to the requirement of detection purpose only with a kind of specific ripple as significant wave.Except routinely
Outside compressional wave, shear wave, diffracted wave used in seismic exploration, it is also possible to stronger using energy in earthquake record
Face ripple and converted wave.
Specifically, the seismic wave of Seismic Imaging Method collection is more ripples, or all-wave.With solution wave equation
Method, the various ripples named can be decomposited, but under boundary condition existing for unevenly plastid,
There can be many particular solutions.Up to the present, under the boundary condition of complexity, people can not obtain fluctuation side
The general solution of journey, i.e., the full detail of ripple can not be utilized, reach exploration with complete waves, or holographic exploration, and can only
Studied for some particular solutions, here it is more ripple concepts.Although Seismic Imaging Method is excited with receiving class
The single-point for being similar to seismic reflection method excites single-geophone receiver or single-point to excite multipoint reception, and it is anti-to be similar to earthquake again
The multi-fold hit, but be very different therewith from processing means, effect and means of interpretation.Can be with
To say, the processing of Seismic Imaging Method also make use of ripe method of seismic prospecting with explaining, conventional filtering,
The methods of convolution, inverse filtering eliminate singing can use, to reach optimization process effect.Therefore, real-time,
Intuitively, very clear the characteristics of being Seismic Imaging Method.
All-wave is included in the waveform that Seismic Imaging Method collects, it is very that all-wave seismic phase analysis, which is fully achieved,
Seldom, it but can at least affirm that the wave field distribution shown by it is relevant with underground medium distribution, its shape
State feature is corresponding with the morphological feature of known geologic body, can infer the form of unknown geologic body.
Multichannel Transient Surface Wave technology is introduced below.
In artificial earthquake exploration, after epicenter excitation, the Propagation around shot point a variety of
(predominantly bulk wave and face ripple, bulk wave include compressional wave and shear wave to elastic wave, and the horizonally-polarized wave in the ripple of face is
Love wave, vertically polarized wave are R wave).
The seismic wave that the shot point of earth's surface excites not only forms back wave and refracted wave on elastic interface,
Also there is one kind near elastic interface to fluctuate, it be by the interfering superposition of compressional wave and shear wave and
Occur wave mode conversion, from energy for they be only distributed near elastic interface, underground is situated between
Matter particle is moved by certain track, and a kind of new energy of formation is very strong and is concentrated mainly on adjacent ground surface
Fluctuation, the fluctuation turn into Rayleigh Wave.
Conventional artificial earthquake exploration in, generally take a kind of ripple and abandon other ripples, and to it is ubiquitous,
The face ripple (mainly base rank R wave) too late, that energy is most strong kept away always is taken as disturbing ripple to be pressed
System and proposition.And above-mentioned seismic wave, the bulk wave of significant wave is either taken as, is also regarded as disturbing
The face ripple of ripple, all carrier passes through the geological information of medium for they, and single seismic exploration method is pair
A kind of waste of geological information obtained by other seismic waves (especially suppresses face ripple as interference ripple
And reject).With the fast development of computer and electronic technology, Multichannel Transient Surface Wave technology is broken through
Sexual development and extensive use, understanding of the face ripple as interference ripple in seismic prospecting is changed, realizes rock
The purpose that geotechnological journey thin layer high-resolution is explored in high precision.
Preferably, the geophysical exploration in step 2 includes：Height is utilized first in the detection range
Density Seismic Imaging technology obtains the distribution situation of anomalous body in the plane；Then multi-channel Transient face is recycled
Wave technology obtains buried depth, thickness and the transverse wave speed of anomalous body.
Wherein it is preferred to the application of the high density earthquake image technology includes：According to step 1 institute really
The fixed detection range sets first detector and the first shot point；In the shot point explosive source,
The waveform of elastic wave caused by the focus is detected and recorded by the wave detector；According to the wave detector
Analysis of test results anomalous body distributing position in the plane.
Specifically, the optimal window of observation system is obtained by the amplitude of analysis waveform, frequency and morphological feature
Mouthful, results are recorded in the whole of detection range determined by step 1 further according to first detector, by dividing
Analysis and the change of wave recording determine the distributing position of anomalous body in the plane.Wherein, the first detector
Refer to the wave detector of the waveform for detecting Seismic Imaging, and the quantity of the first detector can be according to reality
Border needs to set.
Preferably in exploration place deploy the arrangement experiment of wave detector first, in order to understand each
Order and the seismic wave of reception, to determine method of work, are tried the response situation of underground purpose thing during ripple
Testing place should select in the place of existing geologic information.
Seismic Imaging Method arrangement can use the aligning method of Shallow Seismic Reflection Method, typically be arranged using 1-3 roads
Row, per pass can use the wave detector of different frequency, it is therefore an objective to observe in the case of different receives frequencies,
Road spacing may be configured as 5-10m or bigger, and purpose improves also for selecting different offset distances to contrast
Operating efficiency.Offset distance can carry out experiment determination according to the depth of detection, and investigation depth is small, and offset distance is just
It is small, on the contrary investigation depth is big, and offset distance is with regard to big, typically between 5-20m.It is very shallow sometimes for detecting
Underground purpose thing, can use very little offset distance and very little transfer point away from, there is data to show, detection ground
Treasure trove within lower 1 meter, with 0.25m points away from treasure trove shape and depth can be clearly illustrated.
First detector is typically inserted directly into soil, if in the case of being inserted on rock weir or without soil,
The soil of some compactings can be laid in detector position or with plaster fixing wave detector.
Hammering energy and stimulating frequency method can be determined by testing, for example, existing generally for depth
Underground purpose thing detection within 30m, the aluminium conjunction for being placed in ground is manually impacted using 12-20 pounds sledgehammer
The high intensity backing plate such as gold or ferroalloy, you can obtain satisfied stimulation effect, the profile of backing plate can typically adopt
With length of side 25-30cm square.
In order to reduce random disturbances noise and enhancing excitation energy, repeated in each shot point and excite, adopt
Collection superposition, excites rear shot point every time and geophone arrangement moves forward a certain distance (put away from), weight
Multiple said process is until a profile collection is completed.
As the reflection wave seismic exploration of routine, Seismic Imaging Method also needs to select optimum offset, so-called
Optimum offset refers to shot point the distance between to some wave detector, if multiple wave detectors, at this moment
Time just selects each wave detector to the distance of shot point, in order to which each wave detector obtains underground purpose
The significant wave of thing, improve the signal to noise ratio of Seismic Imaging Method.It can see from multi-wave seismic time section,
Face ripple, refracted wave, sound wave, back wave due to spread speed it is different, it is disconnected from each other on time section,
Therefore different offset distances may be selected to utilize the ripple that certain needs, using other unwanted ripples as interference
Ripple is suppressed.
Preferably, detected by the first detector and record the continuous of each wavelet waveforms of lineups
Property, the change of frequency and amplitude energy, and combine existing Information integration on this basis and analyze anomalous body and exist
The distribution of survey line position, then delineation abnormality position encryption survey grid, the accurate anomalous body that obtains are being put down again
Distribution situation on face.
Then Multichannel Transient Surface Wave technology is recycled.Preferably, the application of the Multichannel Transient Surface Wave technology
Including：According to the testing result of the high density Seismic Imaging, in identified anomalous body in the plane
Second Multichannel Transient Surface Wave sensing point and the second shot point are set in distribution；In second shot point
Explosive source, bullet caused by the focus is detected and recorded by the second Multichannel Transient Surface Wave sensing point
The waveform of property ripple；According to burying for the Analysis of test results anomalous body of the second Multichannel Transient Surface Wave sensing point
Deep, thickness and transverse wave speed.
Specifically, the second Multichannel Transient Surface Wave sensing point is 24 wave detectors arranged along line direction,
And each wave detector connects with 24 joints set on connecting line, and 24 wave detectors are set
In the front of second shot point.
After in earth's surface earthquake-wave-exciting, received along Hydrographic General Line wave detector and record bulk wave and face ripple is drawn
The ground vibration situation and ripple risen is from focus to the propagation time of each receiving point in ground.From how genuine
Shake records the distributional pattern (face wave-amplitude energy is most strong, waveform frequency is low) of each waveform lineups, extraction
The frequency dispersion data of face ripple, cutting for stratum is further finally inversed by for the stratum of stratiform, then by the data of frequency dispersion
Velocity layer interface is cut, reaches the purpose of Surface wave prospecting.
It is therefore preferred that by same in the second Multichannel Transient Surface Wave sensing point detection and recording surface ripple
Distributional pattern of each waveform of phase axle in seismogram, extract the frequency dispersion data of face ripple.Then utilize
More to transient surface wave technology, obtain the buried depth and thickness of anomalous body, and transverse wave speed.
Preferably, in step 2,24 pounds of sledgehammer artificial excitation's focus are utilized.
Above-described geophysical prospecting method need not punch etc. on dam body, therefore will not damage dam body, can be with
Constructed in the stages such as flood seasons, to determine the position of anomalous body.Then, can be right in step 3
Anomalous body is sampled analysis, to determine the safety problem present in anomalous body.
Preferably, experiment is sampled to the anomalous body of dam body after flood season and analyzes the physics ginseng of the sample
Number.Normally, after flood season, select some typical anomalous bodys explored or probing sampling, so
Laboratory soil test is carried out to sample to obtain the physical parameter of the sample afterwards.Preferably, in step 3,
The physical parameter includes clay content, compactness, particulate component, plasticity index.
Finally, step 4, it is preferable that the physical prospecting result and/or step 3 obtained by the step 2
Physical parameter judge distribution, type and the potential safety hazard of anomalous body.And specifically, it is preferable to ground, in step
In four, the physical parameter of the anomalous body and the wave character of lineups, the surface wave velocity on stratum are made into phase
The analysis of closing property, is asked for its corresponding relation, is done with this distribution, type and potential safety hazard to the anomalous body
Go out to judge.
Using the physical parameter of the anomalous body obtained in step 3, by list check analysis, it is corresponding abnormal
The continuity of the waveform of the high density Seismic Imaging of section, seismic wave tendency, the frequency range of waveform, waveform
The feature such as amplitude energy, and combine the transverse wave speed that Multichannel Transient Surface Wave prospecting obtains each layer, integrate
Judge the parameters such as the particulate component of anomalous body, clay content, compactness, infer accordingly anomalous body distribution,
Type and potential safety hazard.Finally by the flex point of the dispersion curve of Multichannel Transient Surface Wave, slope, frequency dispersion point
Each stratum of the division such as density degree boundary line and thickness, infer the buried depth and thickness of anomalous body, and according to
The velocity profile of face ripple etc. determines the distribution of anomalous body.
Below by taking the construction in the secure authentication stage of dining hall in Buddhist temple Reservoir engineering as an example, to the present invention's
Detection method is introduced.
First, according to the step of the detection method of the present invention one, the base of dining hall in Buddhist temple reservoir available data is being collected
On plinth, by reconnaissance trip and investigation, tentatively recognize that the construction quality of reservoir upstream dam slope is poor,
Water-level fluctuation position, once there is dam slope collapse accident, it is upstream dam slope to determine therefrom that detection range,
Physical prospecting survey line presses latticed arrangement.
On upstream dam slope top, may determine that by analyzing existing data, it is hidden that the position dam body has safety
Suffer from less, therefore physical prospecting survey line spacing sets larger, and in dam slope middle and lower part, survey line spacing reduces half.
At the scene in exploration process, it is found that Seismic Imaging is recorded in pile No. 0+120~0+186 of wave detector
Locate seismic waveform and obvious exception occur, as shown in Figure 2.Therefore, survey line is encrypted again in the survey line both sides,
And horizontal survey line is increased to out-of-the way position.Pass through lineups image in the Seismic Imaging record to each survey line
Continuity, the frequency of waveform, the situation of change such as energy of amplitude analyzed, accurate delineation abnormality body
Distribution in the plane.The result inferred according to high density Seismic Imaging, on having abnormal survey line
Multichannel Transient Surface Wave is laid, by the explanation to surface wave frequency dispersion curve, obtains buried depth, the thickness of anomalous body
And transverse wave speed, finally in conjunction with the existing data of collection, it is unfavorable geologic body tentatively to infer the anomalous body,
Construction quality is poor, is to cause the reason for dam slope collapses at that time.
After flood season, select some typical anomalous bodys explored or probing sampling, then sample is entered
Row laboratory soil test.Referred to by clay content, sample compactness, particulate component, the plasticity of analyzing sample
The indexs such as number, it is combined with the transverse wave speed change of the wave character and each layer of image lineups, foundation pair
It should be related to, obtain the parameter of data interpretation.
The physical parameter obtained using above-mentioned soil test, its corresponding abnormal section by list check analysis
The continuity of high density Seismic Imaging waveform, seismic wave tendency, the frequency range of waveform, the amplitude of waveform
The features such as energy, and the transverse wave speed that Multichannel Transient Surface Wave prospecting obtains each layer is combined, comprehensive descision is different
The often parameter such as the particulate component of body, clay content, compactness, infer that the type of anomalous body and safety are hidden accordingly
Suffer from grade.Finally by the flex point of Multichannel Transient Surface Wave dispersion curve, slope, frequency dispersion point density degree etc.
The boundary and thickness on each stratum are divided, infers the buried depth and thickness of anomalous body, such as Fig. 3, and according to face ripple
Uniform velocity profile determines the distribution of anomalous body, such as Fig. 4.
Upper table is to dam body drilling and the data tested and corresponding physical prospecting result solution according to step 3
Release the table of comparisons of data.
Using geophysical exploration in the step of detection method of the safety of dam body identification of the present invention
Method determines the distribution of anomalous body on dam body, then determines that an abnormal position explore sampling and right again pair
Sample is tested, and secure authentication is carried out to dam body according to test data and exploration result.By upper
State technical scheme, it is possible to increase the precision and efficiency of detection, and can avoid surveying a wide range of of dam body
Visit, reduce quantities, improve detection efficiency and the degree of accuracy, additionally it is possible to avoid because big on dam body
Punch to scope sampling and damaged to caused by dam body.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, it is still, of the invention and unlimited
Detail in above-mentioned embodiment, can be to the present invention in the range of the technology design of the present invention
Technical scheme carry out a variety of simple variants, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique described in above-mentioned embodiment is special
Sign, in the case of reconcilable, can be combined by any suitable means, in order to avoid need not
The repetition wanted, the present invention no longer separately illustrate to various combinations of possible ways.
In addition, various embodiments of the present invention can be combined randomly, as long as its
Without prejudice to the thought of the present invention, it should equally be considered as content disclosed in this invention.
Claims (10)
1. a kind of detection method of safety of dam body identification, it is characterised in that the detection method includes：
Step 1：Determine the detection range of dam body；
Step 2：Geophysical exploration is carried out in the detection range, to determine anomalous body on dam body
Distribution；
Step 3：Experiment is sampled to the anomalous body of dam body after flood season and analyzes the physics ginseng of the sample
Number；
Step 4：The physical prospecting result and/or the physical parameter of step 3 obtained by the step 2 judges
Distribution, type and the potential safety hazard of anomalous body.
2. detection method according to claim 1, it is characterised in that
Detection range in step 1 is provided according to the observation during data and the reservoir operation for establishing reservoir
Material, carry out comprehensive descision in conjunction with reconnaissance trip and investigation result and determine.
3. detection method according to claim 1, it is characterised in that the earth thing in step 2
Reason exploration includes：
First in the detection range anomalous body is obtained using high density earthquake image technology in the plane
Distribution situation；
Then Multichannel Transient Surface Wave technology is recycled to obtain buried depth, thickness and the transverse wave speed of anomalous body.
4. detection method according to claim 3, it is characterised in that the high density earthquake is reflected
As the application of technology includes：
The detection range sets first detector and the first shot point according to determined by step 1；
In the first shot point explosive source, detected by the first detector and record the focus
The waveform of caused elastic wave, then along survey line every 1 meter simultaneously move the first shot point explosive source and
First detector；
According to testing result of the first detector on same survey line, comprehensive descision simultaneously analyzes anomalous body
Distributing position in the plane.
5. detection method according to claim 4, it is characterised in that pass through first detection
Device detects and records the change of the continuity of each wavelet waveforms of lineups, frequency and amplitude energy.
6. detection method according to claim 3, it is characterised in that the Multichannel Transient Surface Wave
The application of technology includes：
According to the testing result of the high density Seismic Imaging, in point of identified anomalous body in the plane
Second Multichannel Transient Surface Wave sensing point and the second shot point are set in the range of cloth；
In the second shot point explosive source, by arranging upper 24 wave detector detection and described in recording
The waveform of elastic wave caused by focus；
According to Analysis of test results the second Multichannel Transient Surface Wave sensing point of 24 wave detectors in the arrangement
Buried depth, thickness and the transverse wave speed of anomalous body are obtained, it is then simultaneously mobile every 6 meters in abnormal ranges
Second Multichannel Transient Surface Wave sensing point and second excites single source.
7. detection method according to claim 6, it is characterised in that pass through second multiple tracks
Each waveform of lineups is in earthquake record in the detection of the wave detector of Transient Surface Wave sensing point 24 and recording surface ripple
Distributional pattern in figure, extract the frequency dispersion data of face ripple.
8. detection method according to claim 3, it is characterised in that in step 2, utilize
24 pounds of sledgehammer artificial excitation's focus.
9. detection method according to claim 3, it is characterised in that
In step 4, by the wave character of the physical parameter of the anomalous body and lineups, the face on stratum
Ripple velocity of wave makees correlation analysis, asks for its corresponding relation, with this distribution to the anomalous body, type and
Potential safety hazard judges.
10. detection method according to claim 1, it is characterised in that
In step 3, the physical parameter includes clay content, compactness, particulate component, plasticity index.
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