CN102353980B - Equidistant three-point seismic prospecting method for detecting deeply-buried nonmetallic pipeline - Google Patents
Equidistant three-point seismic prospecting method for detecting deeply-buried nonmetallic pipeline Download PDFInfo
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- CN102353980B CN102353980B CN 201110294418 CN201110294418A CN102353980B CN 102353980 B CN102353980 B CN 102353980B CN 201110294418 CN201110294418 CN 201110294418 CN 201110294418 A CN201110294418 A CN 201110294418A CN 102353980 B CN102353980 B CN 102353980B
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Abstract
The invention relates to an equidistant three-point seismic prospecting method for detecting a deeply-buried nonmetallic pipeline, which comprises the following steps of: firstly, arranging three equidistant measuring points in a trend perpendicular to a detected pipeline and measuring the space d between two measuring points; secondly, respectively burying a sensor on the grounds where the three measuring points are positioned, respectively knocking besides the three sensors by using a hammer and obtaining the single-trip times t1, t2 and t3 between the three measuring points and the pipeline by using a testing apparatus (such as a seismograph); thirdly, measuring to obtain the speed v of a primary seismic wave of a soil layer above the pipeline; and fourthly, calculating by using a formula to obtain the position and the buried depth of the pipeline. The equidistant three-point seismic prospecting method for detecting the deeply-buried nonmetallic pipeline which is disclosed by the invention is scientific in design, convenient in operation and easy in grasp. According to the detection method, the nonmetallic pipeline can be quickly positioned; the depth of the nonmetallic pipeline can be quickly determined; the detection difficulty is reduced; the detection efficiency and the accuracy of the detection result are improved; and the technical blank in the field of detection of the nonmetal pipelines is filled up.
Description
Technical field
The present invention relates to the detection method field, especially a kind of equidistant 3 seismic wave methods of surveying buried nonmetal pipeline.
Background technology
Because nonmetal pipe line does not possess conduction, magnetic conduction ability, therefore, the detection method of type electromagnetic induction and magnetic method: nonmetal pipe line is not all had effect such as leading pipeline detection methods such as direct-connected method, clamp method, active source inductive method, passive source search procedure, magnetic field intensity method, magnetic gradient methods.At present, survey nonmetal pipe line still take investigation as main, be aided with direct methods such as opening inspection shaft observation and survey.Large to buried depth, survey without the nonmetal pipe line of inspection shaft, be a difficult problem of pendulum in face of the Geophysical Work person, at present also not to the ability of nonmetal pipe line location, depthkeeping.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of reasonable in design, easy to operate, position that can quick and precisely detect nonmetal pipe line and equidistant 3 seismic wave methods of the degree of depth are provided.
The objective of the invention is to realize by following technological means:
A kind of equidistant 3 seismic wave methods of surveying buried nonmetal pipeline is characterized in that: may further comprise the steps:
(1) perpendicular to being detected walking of pipeline three equidistant measurement points being set upwards, measure the spacing between adjacent two measurement points, namely single-point reflection spot distance is d;
(2) on the ground of three measurement points, all bury a sensor underground, use hammer to knock on these three sensors next doors respectively, obtain three measurement points by testing tool and be respectively t to single way time of pipeline
1, t
2, t
3
(3) the primary seismic wave speed that measures pipeline top soil layer is v;
(4) position and the buried depth that utilize formula to calculate to obtain pipeline.
And the formula described in the step (4) is:
x＝(t
3 2-t
1 2)d/2(t
1 2+t
3 2-2t
2 2)；
h＝{[t
2 2(d-x)
2-t
1 2x
2)]/(t
1 2-t
2 2)}
1/2；
X wherein be pipeline to the ground subpoint to center observation station horizontal range, h is the pipeline buried depth.
And described formula is to adopt following hexa-atomic quadratic equation group to obtain:
s
1 2=h
2+ (d-x)
2--------------------------1 formula
s
2 2=h
2+ x
2------------------------------2 formulas
s
3 2=h
2+ (d+x)
2--------------------------3 formulas
s
1=vt
1---------------------------------4 formulas
s
2=vt
2---------------------------------5 formulas
s
3=vt
3---------------------------------6 formulas
S wherein
1, s
2, s
3Be respectively each measurement point earthquake reflected wave outward journey distance.
And the testing tool described in the step (2) is seismograph or elastic wave tester or wave detector.
Advantage of the present invention and good effect are:
1, this detection method records the single-point reflection spot apart from velocity of longitudinal wave (v) and each observed quantity point seismic event first break time (t of (d), this section soil as long as move towards three measuring points of the equidistant laying of direction along vertical pipeline above nonmetal pipe line
1, t
2, t
3), to bring above-mentioned parameter into formula and calculate the particular location that can obtain nonmetal pipe line, its measurement result is very accurate.
2, this detection flow process is simple, and needs the supplementary instrument that uses seldom in the whole measuring process, so this method grasp easy to learn, easy, can shorten Measuring Time, improve and measure efficient by using this method.
3, the present invention is a kind of design science, easy to operate, equidistant 3 seismic wave methods of holding the buried nonmetal pipeline of wield detection, adopt this detection method to the quick location of nonmetal pipeline and depthkeeping, the difficulty of reduction detection, the efficient that improves detection and the accuracy of result of detection, to have filled up the technological gap of nonmetal pipeline field of detecting.
Description of drawings
Fig. 1 is schematic diagram of the present invention.
Embodiment
Be described in detail embodiments of the invention below in conjunction with accompanying drawing; Need to prove, the present embodiment is narrative, is not determinate, can not limit protection scope of the present invention with this.
A kind of equidistant 3 seismic wave methods of surveying buried nonmetal pipeline may further comprise the steps:
(1) perpendicular to being detected walking of pipeline 3 three equidistant measurement points are being set upwards, the spacing (being single-point reflection spot distance) of measuring between adjacent two measurement points is d;
(2) on the ground 1 of three measurement points, all bury a sensor 2 underground, use hammer to knock on these three sensors next doors respectively, obtain three measurement points by testing tool and be respectively t to single way time of pipeline
1, t
2, t
3, this testing tool can be seismograph or elastic wave tester or wave detector etc.;
(3) the primary seismic wave speed that measures pipeline top soil layer is v, and then each measuring point earthquake reflected wave outward journey distance is vt
1, vt
2, vt
3
(4) establishing pipeline is x to the ground subpoint to center observation station horizontal range, and the pipeline buried depth is h, sets up hexa-atomic quadratic equation group:
s
1 2=h
2+ (d-x)
2--------------------------1 formula
s
2 2=h
2+ x
2------------------------------2 formulas
s
3 2=h
2+ (d+x)
2--------------------------3 formulas
s
1=vt
1---------------------------------4 formulas
s
2=vt
2---------------------------------5 formulas
s
3=vt
3---------------------------------6 formulas
Solve:
x＝(t
3 2-t
1 2)d/2(t
1 2+t
3 2-2t
2 2)；
h＝{[t
2 2(d-x)
2-t
1 2x
2)]/(t
1 2-t
2 2)}
1/2；
With d, the t that obtains in step (1), (2) and (3)
1, t
2, t
3Calculate with the equation above the v substitution, can obtain position x and the buried depth h of pipeline.
Claims (2)
1. equidistant 3 seismic wave methods of surveying buried nonmetal pipeline is characterized in that: may further comprise the steps:
⑴ measure the spacing between adjacent two measurement points perpendicular to being detected walking of pipeline three equidistant measurement points being set upwards, and namely single-point reflection spot distance is d;
⑵ all bury a sensor underground on the ground of three measurement points, use hammer to knock on these three sensors next doors respectively, obtains three measurement points by testing tool and be respectively t to single way time of pipeline
1, t
2, t
3
⑶ the primary seismic wave speed that measure pipeline top soil layer is v;
⑷ position and the buried depth that utilize formula to calculate can to obtain pipeline, described formula is:
x=(t
3 2-t
1 2)d/2(t
1 2+t
3 2-2t
2 2)；
h={[t
2 2（d-x）
2-t
1 2x
2)]/(t
1 2-t
2 2)}
1/2；
X wherein be pipeline to the ground subpoint to center observation station horizontal range, h is the pipeline buried depth;
Above-mentioned formula is to adopt following hexa-atomic quadratic equation group to obtain:
s
1 2=h
2+ (d-x)
2-----------------------------------------1 formula
s
2 2=h
2+ x
2---------------------------------------------2 formulas
s
3 2=h
2+ (d+x)
2-----------------------------------------3 formulas
s
1=vt
1------------------------------------------------4 formulas
s
2=vt
2------------------------------------------------5 formulas
s
3=vt
3------------------------------------------------6 formulas
S wherein
1, s
2, s
3Be respectively each measurement point earthquake reflected wave outward journey distance.
2. equidistant 3 seismic wave methods of the buried nonmetal pipeline of detection according to claim 1, it is characterized in that: the testing tool described in the step ⑵ is seismograph or elastic wave tester or wave detector.
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| CN102353980B true CN102353980B (en) | 2013-04-17 |
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| CN113900139B (en) * | 2021-09-29 | 2023-05-12 | 中铁第六勘察设计院集团有限公司 | Detection system and method for determining spatial position information of underground buried pipeline |
| CN118011494B (en) * | 2024-02-20 | 2024-08-30 | 山东省特种设备检验研究院集团有限公司 | Method, device and equipment for detecting acoustic burial depth of nonmetal buried pressure pipeline |
Citations (5)
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| CN1151212A (en) * | 1994-05-25 | 1997-06-04 | 西屋电气公司 | Amorphous metal tagging system for underground structures |
| CN1431486A (en) * | 1994-12-16 | 2003-07-23 | 东京瓦斯株式会社 | Electromagnetic wave checking method for duct system |
| CN1509414A (en) * | 2001-03-15 | 2004-06-30 | 威顿技术公司 | Apparatus and method for locating subsurface objects in conductive soils induction measurements |
| CN101504283A (en) * | 2009-03-16 | 2009-08-12 | 广州市城市规划勘测设计研究院 | Detection method for pipe diameter of underground non-metal pipe |
| CN201607209U (en) * | 2008-03-03 | 2010-10-13 | 雷迪有限公司 | Detector calculating depth of embedded conductor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2878966B1 (en) * | 2004-12-07 | 2007-02-09 | Inst Francais Du Petrole | METHOD FOR DETERMINING SPECULAR INFORMATION AFTER SEISMIC IMAGERY BEFORE SOMMATION |
-
2011
- 2011-09-30 CN CN 201110294418 patent/CN102353980B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1151212A (en) * | 1994-05-25 | 1997-06-04 | 西屋电气公司 | Amorphous metal tagging system for underground structures |
| CN1431486A (en) * | 1994-12-16 | 2003-07-23 | 东京瓦斯株式会社 | Electromagnetic wave checking method for duct system |
| CN1509414A (en) * | 2001-03-15 | 2004-06-30 | 威顿技术公司 | Apparatus and method for locating subsurface objects in conductive soils induction measurements |
| CN201607209U (en) * | 2008-03-03 | 2010-10-13 | 雷迪有限公司 | Detector calculating depth of embedded conductor |
| CN101504283A (en) * | 2009-03-16 | 2009-08-12 | 广州市城市规划勘测设计研究院 | Detection method for pipe diameter of underground non-metal pipe |
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| 何维华.雷达探测仪在给水管道检漏上的应用.《给水排水》.1991,(第03期), |
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