CN100456035C - Blast source based dam nondestructive detecting system - Google Patents
Blast source based dam nondestructive detecting system Download PDFInfo
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- CN100456035C CN100456035C CNB2005101371160A CN200510137116A CN100456035C CN 100456035 C CN100456035 C CN 100456035C CN B2005101371160 A CNB2005101371160 A CN B2005101371160A CN 200510137116 A CN200510137116 A CN 200510137116A CN 100456035 C CN100456035 C CN 100456035C
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- 238000012545 processing Methods 0.000 claims abstract description 5
- 238000007405 data analysis Methods 0.000 claims description 4
- 238000005422 blasting Methods 0.000 abstract description 10
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 description 9
- 238000004880 explosion Methods 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 5
- 239000002360 explosive Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000002950 deficient Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 206010061245 Internal injury Diseases 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 230000006854 communication Effects 0.000 description 1
- 238000010205 computational analysis Methods 0.000 description 1
- 238000013170 computed tomography imaging Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses a lossless detection system for big bam based on the blasting source that consists of blasting source, receiving system, data recording system and data analyzing and processing system. The receiving system includes differential resistance sensor sets, vibrating wire sensor and geophone laid on the surface of bam. The geometrical position of the blasting source is located on the geometrical center or geometrical centerline. The invention adopts the blasting with known equivalent, and the acoustics parameters of elastic wave are received by the sensor berried on the surface and the interior of bam, then acoustics parameters and waveform change are analyzed by the computer, and the disadvantages and the extent of disadvantages can be determined, and the dynamic monitor for the bam can be realized.
Description
Technical field
The present invention relates to a kind of Non-Destructive Testing and dynamic real-time safety monitoring system of concrete dam, particularly a kind of dam nondestructive detecting system based on blast source.
Background technology
" dam safety " 2003 the 2nd interim " concrete dam sound wave chromatography detection system " literary compositions disclose a kind of method that detects the concrete dam inherent vice, its method is to adopt the cumulative sound wave to impulse, and utilizes the elasticity sound wave to analyze inside concrete defective locations and scope in the variation of inside concrete propagation parameter.Its shortcoming: the one, the acoustic wave excitation energy is little, and it is limited to detect depth range; The 2nd, because big dam volume is big, boundary condition is complicated, depends merely on the surface arrangement instrument, the data of collection are few, difficult the analysis; The 3rd, real-time dynamic monitoring can't be realized in no permanent monitoring point.Existing dam also have differential resistance type sensor and vibrating string type sensor be embedded in, by its signal that emits dam is carried out static state observation, but to dam moment dynamic change detection less than.
Summary of the invention
Purpose of the present invention is exactly that a kind of dam nondestructive detecting system based on blast source will be provided, it can overcome deficiency of the prior art, explosion by known equivalent, the expection ability to work and the degree of safety under different operating modes of utilization dynamic mechanical model prediction dam realize dam is comprehensively monitored.
The object of the present invention is achieved like this: a kind of dam nondestructive detecting system based on blast source, by blast source, receiving system, digital data recording system and data analysis disposal system are formed, be provided with the geophone group that is laid on the dam surface in the receiving system, also be provided with the differential resistance type sensor group and the vibrating string type sensor group that are laid in the dam in the receiving system, receive the elastic wave data that blast source transmits by differential resistance type sensor and the vibrating string type sensor that is installed in the dam, the various parameters,acoustics that joint pick-up sensor receives carry out analyzing and processing by computing machine, dam is monitored in real time, and the geometric position of blast source is chosen on the geometric center point or geometric center lines of dam.
The present invention adopts and is settling blast source on some points on the geometric center point of dam or the geometric center lines, blast source produces appropriate seismic shock wave, in dam body, produce elastic wave and propagation in a certain direction by shock wave, elastic wave can produce reflection and refraction when running into the inherent vice place, velocity of wave takes place simultaneously, wave amplitude, travel-time, the variation of parameters,acoustics such as frequency and the distortion of waveform, by being embedded in the differential resistance type sensor group in the dam, vibrating string type sensor group and the geophone group that is arranged on the dam surface receive the parameters,acoustic of elastic wave, with computing machine these parameters,acoustics and wave form varies are analyzed and researched, determine whether have defective and indicated range in the big dam body.
The present invention has following characteristics:
One, with blast source as dam vibrational excitation signal.
People expect that the equivalent of blast source is appropriate, should produce enough Wave energies to dam, guarantee that receiving system can receive useful signal, can not produce deleterious effect to dam and accessory structure thereof again simultaneously.The present invention is according to the difformity and the design feature of dam, an explosion center is set in appropriate location at the distance dam, rationally control bursting strength and medication equivalent, the well-designed blasting method and the program of detonating, dam is produced an appropriate vibrational excitation, under the prerequisite that does not influence the dam inner structure, provide a pumping signal for detecting the dam internal injury.
Blast source can adopt the elementary errors delaying blasting, to obtain pumping signal system, continuous, can adopt the explosion of interfere type double source in case of necessity, improves the check and analysis precision.
The geometric position of blast source of the present invention is mainly considered to be chosen on the geometric center point or the some points on the geometric center lines of dam, as Fig. 2, shown in Figure 3.
Two, receiving system is made of Dynamic Signal geophone group, differential resistance type sensor group and vibrating string type sensor group.
Built dam except can the geophone of the appropriate location on dam surface, also utilizing the differential resistance type sensor and the vibrating string type sensor that are embedded in the dam body to receive the blasting vibration signal.This point is feasible technically: the natural frequency of vibration that at first is hydraulic structure is very low, and generally in 10Hz, other material dam type should be lower for concrete dam, at present the domestic low frequency high sensor that is applied to hydraulic structure of having developed; Secondly, the differential resistance type instrument is through analysis of experiments, and its Hz-KHz can reach 100Hz, can adopt the dynamic strain indicator image data of customization, though the dynamic property of vibratory string instrument is a bit weaker, can reach more than the 10Hz by improved instrument Hz-KHz, can satisfy test request.
Because the complicacy of dam structure, material and boundary condition, the waveform that receives will be very complicated, and it is vital how correctly distinguishing and to extract useful information.The present invention adopts the design of optimization blast source and optimizes transducer arrangements, such as adopting survey line to replace measuring point, arranging a plurality of measuring points or the like at regular intervals along propagation path, complicated problems is simplified, and makes the waveform character of reception be more convenient for offering an explanation.
Digital data recording system of the present invention mainly is that the simulating signal that the receiving system sensor receives is carried out processing and amplifying and is converted to digital signal, transmits and storage, comes complete operation by dynamic and intelligent acquisition module and parameters,acoustic acquisition module.
Data analysis disposal system of the present invention is responsible for the waveform of gathering is filtered extracting, the computational analysis elastic wave changes at the parameters,acoustic of communication process, feed back the dam vibration parameters, the test section is carried out acoustic CT imaging etc., come complete operation by computing machine.
Description of drawings
The present invention is described in detail below in conjunction with accompanying drawing.
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the selected principle synoptic diagram in blast source of the present invention position.
Fig. 3 is the selected principle synoptic diagram in another kind of blast source of the present invention position.
Wherein: Fig. 1 double as Figure of abstract.
Among the figure: 1, blast source, 2, the differential resistance type sensor group, 3, the vibrating string type sensor group, 4, the geophone group, 5, the dynamic and intelligent acquisition module, 6, the parameters,acoustic acquisition module, 7, the data analysis disposal system, 8, dam body.
Embodiment
Foundation and use can be implemented according to following three steps based on the dam hidden danger detection system of blast source on dam:
The first step: give dam with suitable pumping signal by the blast source of pressing the design of dam characteristics, the various parameters,acoustics of the elastic wave propagation that receives by the pick-up sensor that is installed in the dam surface, carry out the imaging of full section elastic wave CT, reach the purpose of comprehensive control defective.
Second step: receive the elastic wave that blast source transmits by differential resistance type sensor and the vibrating string type sensor that is installed in the dam, and engage the various parameters,acoustics that the pick-up sensor receives and by Computer Processing dam is monitored dynamically, accomplish real-time monitoring.
The 3rd step: be exactly on the basis of dynamic monitoring, set up dam dynamic mechanical analysis model, blast source by known energy encourages then, the dynamic mechanical that detects dam by the dynamic receiving system of installing changes and the parameters,acoustic variation, with the resistivity of detected parameters substitution dynamic mechanical model analysis with the expection of prediction dam.
Blast source method for designing and step: the blast source design that is used to encourage at first should be satisfied two conditions: 1, the vibration of explosion generation is an acceptable to the influence of dam, in the design safety allowed band; 2, the energy of explosion wants enough big, makes the sensor that is arranged on the dam can produce the reaction that can differentiate.Carry out the blast source design under this prerequisite, its step is as follows:
1, owing to each project geologic condition, engineering structure difference, at first to carry out explosion bulge test by identical geology criteria range in the dam district, determine blasting vibration security control formula and surge wave security control formula, the typical control formula is as follows: blasting vibration security control formula: v=101.3 (Q1/3/R) 1.97, v is a Particle Vibration Velocity in the formula, Q is maximum single hop explosive quantity, and R is the distance of quick-fried source to measuring point; Surge wave security control formula: P=11.47 (Q1/3/R) 0.95, P is a surge wave pressure in the formula, and G is maximum single hop explosive quantity, and R is the distance of quick-fried source to measuring point.
2, collect the design permissible value of tested dam.
3, according to security control formula and the selected maximum single hop explosive quantity Q of design permissible value and quick-fried spacing from R, to consider 2-3 times safe clearance when selected.
4, blast source has been determined like this generally speaking, if engineering structure is complicated, larger, be convenient to gather in order to make instrument, data are convenient to analyze, and should consider to adopt the design of interfere type double source or multi-source, promptly duplicate several identical quick-fried sources in quick-fried source position by above-mentioned blast source parameter, detonate by the certain hour interval delay, make dam obtain the vibration signal that certain phase differential is arranged.
In the earth rock cofferdam cut-pff wall demolition blasting construction of Three Gorges Projects second phase, Ge Zhou Ba group has carried out system monitoring to the explosion influence, and parameter is as follows: 1, blast source adopts emulsion [explosive apart from 450 meters on dam, maximum single hop explosive quantity is two maximum dynamite quantity per hole sums, i.e. 60kg; 2, allowing Particle Vibration Velocity is 5cm/s, and the permission surge wave is 1.0kg/cm
2, the actual measurement Particle Vibration Velocity is 0.02cm/s, the actual measurement surge wave is 0.3kg/cm
2
Claims (1)
1, a kind of dam nondestructive detecting system based on blast source, by blast source, receiving system, digital data recording system and data analysis disposal system are formed, be provided with the geophone group that is laid on the dam surface in the receiving system, it is characterized in that: also be provided with the differential resistance type sensor group and the vibrating string type sensor group that are laid in the dam in the receiving system, receive the elastic wave data that blast source transmits by differential resistance type sensor and the vibrating string type sensor that is installed in the dam, the various parameters,acoustics that joint pick-up sensor receives carry out analyzing and processing by computing machine, dam is monitored in real time, and the geometric position of blast source is chosen on the geometric center point or geometric center lines of dam.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005101371160A CN100456035C (en) | 2005-12-29 | 2005-12-29 | Blast source based dam nondestructive detecting system |
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| CNB2005101371160A CN100456035C (en) | 2005-12-29 | 2005-12-29 | Blast source based dam nondestructive detecting system |
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| CN1991357A CN1991357A (en) | 2007-07-04 |
| CN100456035C true CN100456035C (en) | 2009-01-28 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101526331B (en) * | 2009-04-03 | 2013-06-26 | 中国地震局工程力学研究所 | Peak deformation instrument |
| CN102506621B (en) * | 2011-10-10 | 2013-04-17 | 中国神华能源股份有限公司 | Method for determining coal mine blasting mode based on principal vibration frequency of flood-control dam system |
| CN102562163B (en) * | 2011-12-22 | 2013-06-05 | 中国神华能源股份有限公司 | Safety detection method of flood prevention dam system |
| CN102562164B (en) * | 2011-12-22 | 2013-06-05 | 中国神华能源股份有限公司 | Flood prevention dam system safety monitoring method for blasting of opencast coal mining area and monitoring system |
| CN102605745A (en) * | 2012-03-26 | 2012-07-25 | 中国神华能源股份有限公司 | Flood-control dam system aiming at open pit coal mine and constructing method of flood-control dam system |
| CN103323530A (en) * | 2013-06-18 | 2013-09-25 | 山东科技大学 | Method for detecting stability of roadway group surrounding rock by utilizing blasting operation vibration waves |
| CN103728376B (en) * | 2014-01-10 | 2016-01-13 | 武汉大学 | Based on the rock excavation explosion coverage method of discrimination of P wave impulse rise time |
| JP6791029B2 (en) * | 2017-06-12 | 2020-11-25 | 株式会社島津製作所 | Defect detection method and defect detection device |
| CN108122248B (en) * | 2018-01-15 | 2020-04-24 | 武汉大学 | Dam natural vibration frequency identification method based on video measurement |
| DE102018108544A1 (en) * | 2018-01-31 | 2019-08-01 | Bauhaus-Universität Weimar | Detection and localization of structural damage with complete waveform inversion |
| CN110297039A (en) * | 2018-03-23 | 2019-10-01 | 中铁四局集团有限公司 | The acoustic detection method of tunnel surrounding explosion lesion depths |
| CN111239259A (en) * | 2018-12-20 | 2020-06-05 | 湖南北斗微芯产业发展有限公司 | Dam leakage detection method |
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| CN1083224A (en) * | 1992-08-27 | 1994-03-02 | 廖毅 | Gas explosion seismic source and system |
| US6105430A (en) * | 1998-07-02 | 2000-08-22 | The United States Of America As Represented By The Secretary Of The Interior | Inspection of concrete structures using sonic tomography |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1083224A (en) * | 1992-08-27 | 1994-03-02 | 廖毅 | Gas explosion seismic source and system |
| US6105430A (en) * | 1998-07-02 | 2000-08-22 | The United States Of America As Represented By The Secretary Of The Interior | Inspection of concrete structures using sonic tomography |
Non-Patent Citations (6)
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| 佛子岭连拱坝动力试验及模态参数识别. 张翠然，胡晓.水利水电技术，第33卷第12期. 2002 |
| 佛子岭连拱坝动力试验及模态参数识别. 张翠然，胡晓.水利水电技术，第33卷第12期. 2002 * |
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Effective date of registration: 20090724 Address after: Hubei province Yichang City Qing Road No. 1 zip code: 443002 Co-patentee after: Gezhouba Group No.1 Engineering Co., Ltd. Patentee after: China Gezhouba Dam group Limited by Share Ltd Address before: Hubei province Yichang City Qing Road No. 1 zip code: 443002 Patentee before: China Gezhouba Group Co., Ltd. |
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