CN105319584A - Multi-wave nondestructive testing method for defects of dike project - Google Patents
Multi-wave nondestructive testing method for defects of dike project Download PDFInfo
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- CN105319584A CN105319584A CN201510466417.1A CN201510466417A CN105319584A CN 105319584 A CN105319584 A CN 105319584A CN 201510466417 A CN201510466417 A CN 201510466417A CN 105319584 A CN105319584 A CN 105319584A
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Abstract
The invention provides a multi-wave nondestructive testing method for defects of a dike project. The method comprises the following steps that: 1, seismic waves are generated by a seismic source, the seismic waves are transmitted in a dike body medium, and vibration of measuring lines on the surface of the dike body is further caused; and 2, vibration signals generated by the vibration of a plurality of measuring points on the measuring lines are collected, vibration waveform distribution maps of the plurality of measuring points are calculated, and defect positions, defect sizes and distribution areas in the dike project are further determined. The seismic waves comprise one or more kinds of a P wave, an S wave and a surface wave. The vibration waveform distribution maps comprise one or more kinds of a P wave waveform distribution map, an S wave waveform distribution map and a surface wave waveform distribution map. By utilizing the advantage that the P waves, the S waves and surface waves generated by the seismic waves are capable of relatively accurately determining depths, horizontal positions and size ranges of defects in the dike body, defect positions and the size ranges of the defects in the dike project are comprehensively, efficiently and accurately determined.
Description
Technical field
The present invention relates to the quality testing of water conservancy and hydropower dyke building, particularly, relate to a kind of many ripples lossless detection method of dyke building defect.
Background technology
The major function of dyke is the hydraulic structure making a certain scope resist the flood infringement of certain flood control standard, is the important component part in Flood Control System.The problem such as what the 50-70 age in last century built watch out for ubiquity dyke stuffing is of low quality, through the operation of 40-60, there is the defects such as crack, cavity, the soil body are loose, weak intercalated layer, the straw bed of material, badger rat hole cave in major part dyke building levee body, having there is the deformation failures such as seepage deformation, sedimentation and deformation and embankment unstability in severe patient, directly threatens life and the property safety of the people around dyke.Therefore, in order to the casualty loss effectively preventing or alleviate dyke deformation failure to cause, the defect of Timeliness coverage dyke building is necessary.But the defect of watching out for engineering is generally inner at levee body, is difficult to directly be found, only has and could judge Problems existing in dyke building fast and accurately by comparatively advanced method.
At present, artificial visiting method, damaged method and nondestructive determination is mainly contained for dyke building defect inspection method.Artificial visiting method not only wastes time and energy but also is difficult to find the defect of levee body inside.Damaged method is as probing etc., not only there is locality but also there is destructiveness, in view of importance and the singularity of dyke building, often do not allow the structure destroying levee body when detecting it, therefore the method is difficult to hidden danger and the dangerous situation detection in dyke building error-free running period or flood season.Non-Destructive Testing is a kind of method of the inner or surface imperfection of detection architecture under the condition of not attacking material or structure, and the method can provide various physical parameter and information, can the defect place of detecting structure, again can the character of Knowing material; And temporal and spatial sampling width is large, the solid exploration linked work at selected spots with that in entire areas can be implemented; Be a kind of technology of Noninvasive, the environment of structure and geology can not be destroyed; Speed is fast, and cost is low.
For the defect situation of dyke building levee body, in the Non-Destructive Testing of levee body material, use comparatively general method to have method of seismic exploration, electrical method, underwater sound prospecting, ground penetrating radar method, elastic wave testing method, tomography, radioactivity survey method and comprehensive logging method at present, wherein method of seismic exploration is most widely used.Method of seismic exploration is by earthquake-wave-exciting, and makes it propagate with forms such as P ripple, S ripple and ground rolls in dyke, is carried out the detection of levee body defect by the physical quantity variation feature analyzing P ripple, S ripple and ground roll etc.
At present, the P ripple that the application of method of seismic exploration in dyke defects detection utilizes focus to produce mostly or S ripple propagate the change causing the time domain distribution of levee body surface measuring point vibrational image to calculate P ripple or S wave-wave speed in levee body, are determined the approximate location of levee body defect by the change of these velocities of wave.But, existing technology is not distinguished P ripple, S ripple and the ground roll difference to defective locations in levee body and size response that focus in method of seismic exploration produces, and only adopt single ripple (P ripple or S ripple) response to carry out defective locations analysis, cause the actual distribution of the testing result of defective locations and scope and defect to there is larger deviation.
Summary of the invention
For defect of the prior art, the object of this invention is to provide a kind of many ripples lossless detection method of dyke building defect, can determine more accurately the position of dyke building defect and magnitude range.
According to many ripples lossless detection method of dyke building defect provided by the invention, comprise the following steps:
Step 1: produce seismic event by focus, seismic event at levee body Propagation, and then causes the vibration of the survey line on levee body surface;
Step 2: the vibration signal gathering multiple measuring point vibration generation on survey line calculates the distributed wave figure of multiple measuring point vibration, and then determines dyke building inherent vice position, defect volume size and distribution area.
Preferably, described seismic event to comprise in P ripple, S ripple and ground roll any one or appoints multiple;
Described vibrational waveform distribution plan to comprise in P waveform distribution plan, S waveform distribution plan and surface waveform distribution plan any one or appoints multiple;
Described P waveform distribution plan is for calculating the velocity of wave of P ripple on multiple measuring point, and then the point position information changed by P wave-wave speed, judges the depth range of defect immediately below this survey line;
Described S waveform distribution plan is for calculating the velocity of wave of S ripple on multiple measuring point, and then the point position information changed by S wave-wave speed, judges the horizontal level scope of defect immediately below this survey line;
Described surface waveform distribution plan is for calculating the ground roll frequency of ground roll on multiple measuring point, and the point position information changed by ground roll frequency, judges the magnitude range of defect immediately below this survey line.
Preferably, described survey line comprises horizontal survey line and longitudinal survey line;
Described levee body surface described horizontal survey line is evenly set in a lateral direction; The vertical direction on described levee body surface evenly arranges described longitudinal survey line;
Described measuring point is the intersection point of horizontal survey line and longitudinal survey line.
Preferably, many ripples Non-destructive Testing Data acquisition system is adopted to gather vibration signal in step 2.
Preferably, step 2 is specially: detect all surveys line on levee body surface, the vibration signal gathering multiple measuring point vibration generation on all surveys line calculates the distributed wave figure of multiple measuring point vibration, determines the defective locations of levee body inside on three dimensions and the scope of size.
Compared with prior art, the present invention has following beneficial effect:
1, the advantage that the present invention utilizes seismic event to produce P ripple, S ripple and ground roll more accurately can be determined respectively to the levee body inherent vice degree of depth, horizontal level and magnitude range, carries out comprehensive high-efficiency to dyke building inherent vice position and magnitude range and determines accurately;
2, the present invention gathers vibration signal by many ripples Non-destructive Testing Data acquisition system and calculates distributed wave figure, the distributed wave figure of S ripple and the distributed wave figure of ground roll of P ripple, simple and convenient, is easy to realize.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is side line distribution plan of the present invention;
Fig. 2 is dyke building defect many ripples lossless detection method schematic diagram in the present invention.
1 is longitudinal survey line;
2 is horizontal survey line;
3 is focus;
4 is survey line;
5 is the measuring point on survey line P-P '.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
In the present embodiment, many ripples lossless detection method of dyke building defect provided by the invention, different and the ground roll of the speed that the P ripple utilizing seismic event to produce and S ripple respond the defect of levee body inside in dyke communication process is to the Basic Physical Properties of the frequency change difference that levee body inherent vice responds, more exactly determined lossless detection method is carried out to the position of levee body inherent vice and magnitude range, comprises the following steps:
Step 1: produce seismic event by focus, seismic event at levee body Propagation, and then causes the vibration of the survey line on levee body surface;
Step 2: the vibration signal that the vibration gathering multiple measuring point on survey line produces calculates the vibrational waveform distribution plan of multiple measuring point, and then determines dyke building inherent vice position, defect volume size and distribution area.Many ripples Non-destructive Testing Data acquisition system is adopted to gather vibration signal in step 2.
Described seismic event to comprise in P ripple, S ripple and ground roll any one or appoints multiple; Described vibrational waveform distribution plan to comprise in P waveform distribution plan, S waveform distribution plan and surface waveform distribution plan any one or appoints multiple; Described P waveform distribution plan is for calculating the velocity of wave of P ripple on multiple measuring point, and then, by the point position information that P wave-wave speed changes, judge the depth range of defect immediately below this survey line, be specially, described P ripple can be measured by measuring point on the survey line on levee body surface the different characteristic of speed of levee body inherent vice response in levee body communication process, utilizes this characteristic can determine the depth range of defect below survey line.
Described S waveform distribution plan obtains the velocity of wave of S ripple on multiple measuring point for calculating, and then, by the point position information that S wave-wave speed changes, judge the horizontal level scope of defect immediately below this survey line, be specially, described S ripple can be measured by measuring point on the survey line on levee body surface the different characteristic of speed of levee body inherent vice response in levee body communication process, utilizes this characteristic can determine the scope of defect level position below survey line.Described surface waveform distribution plan is for calculating the ground roll frequency of ground roll on multiple measuring point, the point position information changed by ground roll frequency, judge the magnitude range of defect immediately below this survey line, be specially, described ground roll can be measured by measuring point on the survey line on levee body surface the different characteristic of frequency of levee body inherent vice response in levee body communication process, utilizes this characteristic can determine the scope of defect size below survey line.
Described survey line comprises horizontal survey line and longitudinal survey line; Described levee body surface described horizontal survey line is evenly set in a lateral direction; The vertical direction on described levee body surface evenly arranges described longitudinal survey line; Described measuring point is the intersection point of horizontal survey line and longitudinal survey line.
More specifically, by measuring point, as A, B, C etc. are arranged on the survey line on levee body surface, as Fig. 1 survey line P-P ', seismic event is produced by focus, the P ripple that seismic event sends, S ripple and ground roll are at levee body Propagation, survey line will vibrate from the measuring point of focus different distance, vibration signal will be transferred to many ripples Non-destructive Testing Data acquisition system, as shown in Figure 2, by the process of data processing software in data acquisition system (DAS), the vibrational waveform distribution plan of each measuring point on survey line can be obtained, as shown in Figure 2.According to the P waveform distribution plan of measuring point each on survey line, can calculate and obtain the velocity of wave of P ripple on each measuring point, the point position information changed by P wave-wave speed, can judge the depth range of defect immediately below this survey line; According to the S waveform distribution plan of measuring point each on survey line, can calculate and obtain the velocity of wave of S ripple on each measuring point, the point position information changed by S wave-wave speed, can judge the horizontal level scope of defect immediately below this survey line; According to the surface waveform distribution plan of measuring point each on survey line, can calculate and obtain the ground roll frequency of ground roll on each measuring point, the point position information changed by ground roll frequency, can judge the magnitude range of defect immediately below this survey line.On comprehensive analysis survey line, measuring point P ripple information determined depth of defect scope, S ripple information determined defect level position range and the determined defect size scope of ground roll, more accurately can determine position and the magnitude range of defect below this survey line.Repeat the step of above-mentioned a certain survey line P-P ' below defective locations and magnitude range detection, the orthogonal all surveys line (horizontal survey line and longitudinal survey line) being arranged in levee body surface are detected, levee body interior three-dimensional defective locations spatially and the scope of size can be determined.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (5)
1. many ripples lossless detection method of dyke building defect, is characterized in that, comprise the following steps:
Step 1: produce seismic event by focus, seismic event at levee body Propagation, and then causes the vibration of the survey line on levee body surface;
Step 2: the vibration signal gathering multiple measuring point vibration generation on survey line calculates the distributed wave figure of multiple measuring point vibration, and then determines dyke building inherent vice position, defect volume size and distribution area.
2. many ripples lossless detection method of dyke building defect according to claim 1, is characterized in that,
Described seismic event to comprise in P ripple, S ripple and ground roll any one or appoints multiple;
Described vibrational waveform distribution plan to comprise in P waveform distribution plan, S waveform distribution plan and surface waveform distribution plan any one or appoints multiple;
Described P waveform distribution plan is for calculating the velocity of wave of P ripple on multiple measuring point, and then the point position information changed by P wave-wave speed, judges the depth range of defect immediately below this survey line;
Described S waveform distribution plan is for calculating the velocity of wave of S ripple on multiple measuring point, and then the point position information changed by S wave-wave speed, judges the horizontal level scope of defect immediately below this survey line;
Described surface waveform distribution plan is for calculating the ground roll frequency of ground roll on multiple measuring point, and the point position information changed by ground roll frequency, judges the magnitude range of defect immediately below this survey line.
3. many ripples lossless detection method of dyke building defect according to claim 1 and 2, is characterized in that, described survey line comprises horizontal survey line and longitudinal survey line;
Described levee body surface described horizontal survey line is evenly set in a lateral direction; The vertical direction on described levee body surface evenly arranges described longitudinal survey line;
Described measuring point is the intersection point of horizontal survey line and longitudinal survey line.
4. many ripples lossless detection method of dyke building defect according to claim 1, is characterized in that, adopts many ripples Non-destructive Testing Data acquisition system to gather vibration signal in step 2.
5. many ripples lossless detection method of dyke building defect according to claim 3, it is characterized in that, step 2 is specially: detect all surveys line on levee body surface, the vibration signal gathering multiple measuring point vibration generation on all surveys line calculates the distributed wave figure of multiple measuring point vibration, determines the defective locations of levee body inside on three dimensions and the scope of size.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106525970A (en) * | 2016-11-07 | 2017-03-22 | 深圳大学 | Project slope quality detection method and system based on aerial robot |
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Application publication date: 20160210 |