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A kind of buried pipeline deformation pattern detection method
CN107449368B
China
- Other languages
Chinese - Inventor
商峰 黄涛 朱新民 金可礼 汪劲松 罗雄杰 冯少孔 刘亦兵 崔炜 李良庚 邓检强 陈立林 彭冬 聂鼎 范哲 陈�峰 王恒 杨璐菲 吕航 - Current Assignee
- China Institute of Water Resources and Hydropower Research
Worldwide applications
2017
CN
Application CN201710708305.1A events
2017-08-17
2017-12-08
2019-05-21
Application granted
2019-05-21
Status
Active
2037-08-17
Anticipated expiration
Description
translated from
Technical field
The present invention relates to buried pipeline detection technique fields, detect in particular to a kind of buried pipeline deformation pattern
Method.
Background technique
Buried pipeline, the basis that especially flexible buried pipeline works normally is pipeclay collective effect.The earthen backfill of pipe side is not
Closely knit, loss or loosening, deformation can all cause pipeline local stress to increase, threat tube safety.Due to the effect of self weight, pipe
Nearby soil generally contacts more close with pipe outer wall on top, but pipeline center's elevation is hereinafter, the compactness for managing the outer soil body is often inadequate,
This is the major reason for causing tube top vertical deformation to increase.Currently, the judgement of flexible conduit structure safety buried for heavy caliber
Tube top vertical deformation data are depended on, have carried out clear stipulaties to this in relevant industries technical specification.However only rely on this
One index can not reflect the real work condition of pipeline configuration, it is therefore desirable to carry out comprehensive test to pipeline, determine pipeline
Deformation pattern, provide foundation for pipeline configuration security evaluation.
Summary of the invention
The purpose of the present invention is to provide a kind of buried pipeline deformation pattern detection methods, can reflect more fully hereinafter
The real work condition and deformation pattern of pipeline configuration mention convenient for determining the deformation pattern of pipeline for pipeline configuration security evaluation
For foundation.
The embodiment of the present invention is achieved in that
A kind of buried pipeline deformation pattern detection method comprising: the buried pipeline that will be measured by laser profile scanning instrument
The coordinate of test point bring oval normal equation into and carry out data and be fitted to obtain the first fit equation.Test point is multiple, Duo Gejian
Measuring point is along the circumferentially distributed of buried pipeline and is respectively positioned on the approximately the same plane of the axial line perpendicular to buried pipeline.Oval standard side
The horizontal axis of journey corresponds to the horizontal direction of buried pipeline, and the longitudinal axis of oval normal equation corresponds to the vertical direction of buried pipeline.Along ellipse
Corresponding will test of the horizontal axis of circle normal equation is a little divided into the first test point group and the second test point group.By the first test point group band
Enter oval normal equation progress data and is fitted to obtain the second fit equation.The second test point group is brought into oval normal equation to count
According to being fitted to obtain third fit equation, and control the second fit equation and third fit equation common point and total horizontal axis.
The length of the longitudinal axis of first fit equation is 2b, and the length of the longitudinal axis of the second fit equation is 2b1, third fitting side
The length of the longitudinal axis of journey is 2b2, and the factory internal diameter of buried pipeline is D, and the length of the horizontal axis of the first fit equation is 2a1, second
The length of the horizontal axis of both fit equation and third fit equation is 2a2.If | D-2b | > | D- (b1+b2) |, with b with D and
A1 compares, and obtains the deformation pattern of buried pipeline.If | D-2b | < | D- (b1+b2) |, compared with b1 and b2 with D and a2, is obtained buried
The deformation pattern of pipeline.
The beneficial effect of the embodiment of the present invention is:
Buried pipeline deformation pattern detection method provided in an embodiment of the present invention utilizes the first fit equation, the second fitting side
The horizontal axis and the longitudinal axis of journey and third fit equation are compared with the factory internal diameter of buried pipeline, to from which further follow that underground pipe
The deformation pattern in road.By the design, it can more accurately reflect the real work condition and deformation pattern of pipeline configuration, just
In the deformation pattern for determining pipeline, foundation is provided for pipeline configuration security evaluation.
In addition, the first fit equation, the second fit equation and third fit equation are the coordinate and ellipse by test point
The compressive deformation mode that normal equation progress data intend chummy, to be finally reflected buried pipeline is more accurate and reliable, can
It is more truly reflected the practical distortion mode of buried pipeline, is carried out convenient for the subsequent deformation pattern to buried pipeline further
Detection and judgement.It can reflect the real work condition and deformation pattern of pipeline configuration, more accurately, comprehensively convenient for determining
The deformation pattern of pipeline provides foundation for pipeline configuration security evaluation.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the Fitting Analysis result of the first fit equation of buried pipeline provided in an embodiment of the present invention；
Fig. 2 is the second fit equation of buried pipeline provided in an embodiment of the present invention and the Fitting Analysis of third fit equation
As a result.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
A kind of buried pipeline deformation pattern detection method provided below the embodiment of the present invention is specifically described.
Buried pipeline deformation pattern detection method provided in an embodiment of the present invention includes:
The coordinate of the test point of the buried pipeline measured by laser profile scanning instrument is brought into oval normal equation to count
According to being fitted to obtain the first fit equation.Wherein, test point is multiple, and multiple test points are along the circumferentially distributed of buried pipeline and are respectively positioned on
Perpendicular to the approximately the same plane of the axial line of buried pipeline.The horizontal axis of oval normal equation corresponds to the horizontal direction of buried pipeline,
The longitudinal axis of oval normal equation corresponds to the vertical direction of buried pipeline.
The first test point group and the second test point group are a little divided into along corresponding will test of the horizontal axis of oval normal equation.By
One test point group brings oval normal equation progress data into and is fitted to obtain the second fit equation.Bring the second test point group into oval mark
Quasi- equation carries out data and is fitted to obtain third fit equation, and controls the second fit equation and third fit equation common point and be total to
Horizontal axis.
The length of the longitudinal axis of first fit equation is 2b, and the length of the longitudinal axis of the second fit equation is 2b1, third fitting side
The length of the longitudinal axis of journey is 2b2, and the factory internal diameter of buried pipeline is D, and the length of the horizontal axis of the first fit equation is 2a1, second
The length of the horizontal axis of both fit equation and third fit equation is 2a2.
If | D-2b | > | D- (b1+b2) |, compared with b with D and a1, obtains the deformation pattern of buried pipeline.If | D-2b | < |
D- (b1+b2) |, compared with b1 and b2 with D and a2, obtains the deformation pattern of buried pipeline.
Buried pipeline deformation pattern detection method utilizes the first fit equation, the second fit equation and third fit equation
Horizontal axis and the longitudinal axis are compared with the factory internal diameter of buried pipeline, to from which further follow that the deformation pattern of buried pipeline.Pass through
The design can more accurately reflect the real work condition and deformation pattern of pipeline configuration, convenient for determining the deformation of pipeline
Mode provides foundation for pipeline configuration security evaluation.
In addition, the first fit equation, the second fit equation and third fit equation are the coordinate and ellipse by test point
The compressive deformation mode that normal equation progress data intend chummy, to be finally reflected buried pipeline is more accurate and reliable, can
It is more truly reflected the practical distortion mode of buried pipeline, is carried out convenient for the subsequent deformation pattern to buried pipeline further
Detection and judgement.It can reflect the real work condition and deformation pattern of pipeline configuration, more accurately, comprehensively convenient for determining
The deformation pattern of pipeline provides foundation for pipeline configuration security evaluation.
What the horizontal axis length of the first fit equation, the second fit equation and third fit equation three all reflected is buried pipeline
Internal diameter in the horizontal direction, what the longitudinal axis length of the first fit equation, the second fit equation and third fit equation three all reflected
It is the internal diameter of buried pipeline along the vertical direction.
Further, as | D-2b | > | D- (b1+b2) | when.
If 2b < D < 2a1, buried pipeline is conventional normal deformation.
If 2b < 2a1 < D, buried pipeline is conventional normal deformation, and is deformed related by repairing with buried pipeline.
If D < 2b < 2a1, buried pipeline is conventional normal deformation, and deformation and the factory accuracy of manufacture of buried pipeline have
It closes.
If 2a1 < D < 2b, the deformation degree of extrusion of the two sides in the horizontal direction of buried pipeline is more than conventional normal deformation
Greatly.
If 2a1 < 2b < D, the deformation degree of extrusion of the two sides in the horizontal direction of buried pipeline is more than conventional normal deformation
Greatly, and deformation is related by repairing with buried pipeline.
If D < 2a1 < 2b, the deformation degree of extrusion of the two sides in the horizontal direction of buried pipeline is more than conventional normal deformation
Greatly, and deformation is related with the factory accuracy of manufacture of buried pipeline.
Further, as | D-2b | < | D- (b1+b2) | when.
If 2b2 < 2b1 < D < 2a2, the deformation extent of the lower half portion along the vertical direction of buried pipeline is more normal than conventional
It deforms bigger.
If 2b2 < 2b1 < 2a2 < D, the deformation extent of the lower half portion along the vertical direction of buried pipeline is more normal than conventional
Deformation is bigger, and deforms related by repairing with buried pipeline.
If D < 2b2 < 2b1 < 2a2 or 2b2 < D < 2b1 < 2a2, the deformation of the lower half portion along the vertical direction of buried pipeline
Degree is bigger than conventional normal deformation, and deforms related with the factory accuracy of manufacture of buried pipeline.
If 2a2 < D < 2b2 < 2b1,2a2 < 2b2 < D < 2b1,2b2 < D < 2a2 < 2b1 or 2b2 < 2a2 < D < 2b1, buried pipeline
The deformation degree of extrusion of two sides in the horizontal direction and the deformation extent of lower half portion along the vertical direction are than conventional normal change
Shape is bigger.
If 2a2 < 2b2 < 2b1 < D or 2b2 < 2a2 < 2b1 < D, the extrusion deformation journey of the two sides of buried pipeline in the horizontal direction
Degree and the deformation extent of lower half portion along the vertical direction are bigger than conventional normal deformation, and deform with buried pipeline by repairing
It mends related.
If D < 2a2 < 2b2 < 2b1 or D < 2b2 < 2a2 < 2b1, the extrusion deformation journey of the two sides of buried pipeline in the horizontal direction
Degree and the deformation extent of lower half portion along the vertical direction are bigger than conventional normal deformation, and deform the factory with buried pipeline
The accuracy of manufacture is related.
Further, using oval normal equation carry out the horizontal axis for being more convenient for obtaining the first fit equation after data fitting and
The length of the longitudinal axis, convenient for obtaining the deformation value of buried pipeline.Carrying out data fitting using oval normal equation can be into one
Step reduces the enforcement difficulty of buried pipeline deformation extent detection method.
It should be noted that the elliptic equation that also can use in addition to oval normal equation carries out data fitting, but simultaneously
It will not influence the accuracy of result.
In view of the pipe side soil of buried pipeline is there may be uncompacted influence is backfilled, detected using elliptic equation to first
Point group and the second test point group are fitted analysis respectively, can further increase the deformation extent and deflection finally obtained
The accuracy of numerical value.
Further, the first test point group is located at the top of horizontal axis, and the second test point group is located at the lower section of horizontal axis.First by
One test point group brings elliptic equation progress data into and is fitted to obtain the second fit equation, by the central point and horizontal axis of the second fit equation
As the central point and long axis of third fit equation, then brings the second test point group into elliptic equation progress data fitting and obtain
Third fit equation.
Take the sum of half vertical pivot of the second fit equation and the length of half vertical pivot of third fit equation going out with buried pipeline
The difference of factory's diameter, to obtain the second deformation extent feature of buried pipeline, the i.e. corresponding deformation along the vertical direction of buried pipeline
Numerical quantity.
Further, the length of the longitudinal axis of first fit equation is 2b, the length of the longitudinal axis of second fit equation
Degree is 2b1, and the length of the longitudinal axis of the third fit equation is 2b2, and the factory internal diameter of the buried pipeline is D, described first
The length of the horizontal axis of fit equation is 2a1, the length of the horizontal axis of both second fit equation and described third fit equation
It is 2a2.
Take the absolute value biggish one of deformation value in the first deformation extent feature and second deformation extent feature the two
Person characterizes the deformation extent feature of buried pipeline.That is: if | D-2b | > | D- (b1+b2) |, compared with b with D and a1, obtains institute
State the deformation pattern of buried pipeline；If | D-2b | < | D- (b1+b2) |, compared with b1 and b2 with D and a2, obtains the underground pipe
The deformation pattern in road.
Buried pipeline deformation pattern detection method provided in an embodiment of the present invention can reflect pipeline configuration more fully hereinafter
Real work condition and deformation pattern, convenient for determine pipeline deformation pattern, provide foundation for pipeline configuration security evaluation.
It is illustrated below in conjunction with process of the specific embodiment to above-mentioned buried pipeline deformation pattern detection method.
Embodiment
The present embodiment provides a kind of buried pipeline deformation pattern detection methods, comprising:
1. the n detection positioned at inner wall of buried pipeline is collected using laser profile scanning instrument in the lumen of buried pipeline
The coordinate of point.The coordinate of each test point are as follows:
Wherein, xiFor the abscissa of i-th of test point；ziFor the ordinate of i-th of test point；diIt is arrived for i-th of test point
The distance of rotation center；θiFor i-th of test point by origin of rotation center and the rotation angle that horizontal axis is horizontally disposed
Degree；I and n is positive integer and i is less than or equal to n.
2. bringing the coordinate of each test point into oval normal equation Ax2+Bz2+ Cx+Dz+E=0 carries out data and is fitted to obtain
First fit equation.The a length of 2a1 of the horizontal axis of first fit equation, a length of 2b of the longitudinal axis.And the i.e. corresponding buried pipeline of a length of 2a1 of horizontal axis
Internal diameter in the horizontal direction, the long 2b of the longitudinal axis are the internal diameter of corresponding buried pipeline along the vertical direction.Then, buried pipeline is along vertical side
To deformation value w1=D-2b, wherein w1 be buried pipeline deformation value, D be buried pipeline factory internal diameter.
3. it is a little divided into the first test point group and the second test point group along corresponding will test of the horizontal axis of the first fit equation, the
One test point group is located at the top of horizontal axis, and the second test point group is located at the lower section of horizontal axis.Bring the first test point group into oval mark
Quasi- equation Ax2+Bz2+ Cx+Dz+E=0 carries out data and is fitted to obtain the second fit equation, by the central point of the second fit equation and
Central point and horizontal axis when horizontal axis is fitted as the second test point group, then bring the second test point group into oval normal equation
Ax2+Bz2+ Cx+Dz+E=0 carries out data and is fitted to obtain third fit equation.The length of the longitudinal axis of first fit equation is 2b, the
The length of the longitudinal axis of two fit equations is 2b1, and the length of the longitudinal axis of third fit equation is 2b2, the factory internal diameter of buried pipeline
For D, the length of the horizontal axis of the first fit equation is 2a1, the length of the horizontal axis of both the second fit equation and third fit equation
It is 2a2.As depicted in figs. 1 and 2.
If 4. | D-2b | > | D- (b1+b2) |, compared with b with D and a1, obtains the deformation pattern of buried pipeline.If | D-2b |
< | D- (b1+b2) |, compared with b1 and b2 with D and a2, obtains the deformation pattern of buried pipeline.Specific comparison result with it is aforementioned interior
Hold identical, details are not described herein again.
In conclusion buried pipeline deformation pattern detection method provided in an embodiment of the present invention can reflect more fully hereinafter
The real work condition and deformation pattern of pipeline configuration mention convenient for determining the deformation pattern of pipeline for pipeline configuration security evaluation
For foundation.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
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translated from Chinese
Claims (10)
Hide Dependent
translated from Chinese