CN103423596B - A kind of drainpipe detecting and appraisal procedure applying handheld video and closed circuit TV - Google Patents
A kind of drainpipe detecting and appraisal procedure applying handheld video and closed circuit TV Download PDFInfo
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- CN103423596B CN103423596B CN201310298460.2A CN201310298460A CN103423596B CN 103423596 B CN103423596 B CN 103423596B CN 201310298460 A CN201310298460 A CN 201310298460A CN 103423596 B CN103423596 B CN 103423596B
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 238000004364 calculation method Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000010865 sewage Substances 0.000 claims description 9
- 239000003673 groundwater Substances 0.000 claims description 5
- 230000008439 repair process Effects 0.000 claims description 4
- 206010023204 Joint dislocation Diseases 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000008398 formation water Substances 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 22
- 239000000463 material Substances 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract description 2
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- 238000011156 evaluation Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 235000019994 cava Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 230000007847 structural defect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
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- 230000009545 invasion Effects 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Abstract
A kind of drainpipe detecting and appraisal procedure applying handheld video and closed circuit TV, application handheld video carries out Preliminary detection, utilize the detection data of handheld video, calculate and obtain pipe deforming degree, pipeline break/degree of caving in, pipe joint degree of misalignment, pipeline gives prominence to interface/poling degree and pipeline obstruction degree, according to result of calculation, classify according to standard, according to classification results, perform corresponding operating, the present invention can improve the efficiency of China's urban discharging pipeline detecting and assessing effectively, reduce the workload of drainage pipe cleaning and closed circuit TV detection, use manpower and material resources sparingly, effectively can detect the defect of pipeline that situation is serious simultaneously, trouble-saving generation, ensure the safe operation of urban drainage pipe network.
Description
Technical field
The present invention relates to a kind of defects detection and condition evaluation method of drainage pipe, particularly a kind of drainpipe detecting and appraisal procedure applying handheld video and closed circuit TV.
Background technique
In recent years along with the quickening of China's Development of China's Urbanization, urban drainage pipe network development is rapid, but pipeline periodic detection supporting with it and the management system lagging in development of maintenance, until some urban duct major defect has occurred and caused heavy losses and accident, its significance has just caused concern.Closed circuit TV (Closed Circuit Television, CCTV) be a kind of by the drainpipe detecting technology accepted extensively both at home and abroad, it can record the state of most of defect of pipeline full and accurately, lock defect position accurately, but require detect front scavenge pipe road internal reasons and reduce water level, CCTV detection efficiency is low, operation and interpretation of result process complexity, high to personnel qualifications, and China city does not have the ability ensureing that pipeline cleans before detection at present, can not ensure that enough manpower and materials drop into the detecting and assessing of pipeline, therefore the difficulty promoted on a large scale in China of this technology is larger.Handheld video (QuickView zero R, QV) be the more simple and efficient video detection mode of a kind of operation, it is by camera, the operating stem of adjustable length and control unit composition, camera can through mouth of pipe shooting pipeline situation video in inspection shaft, not beg to surrender low water level, but shortcoming cannot position defect, defects detection is not careful.Handheld video obtains application in China urban, but the evaluating method not yet set up both at home and abroad at present for handheld video, therefore great majority detect is rely on experienced operator to carry out scene to judge, further statistics and deep evaluation analysis, does not cause the waste detecting resource and testing result.
" urban drainage pipe detection and assessment technology code " that China issues in the recent period specifies, drainage pipe proof cycle for the purpose of structural situation is 5 ~ 10 years, proof cycle for the purpose of functionality condition is 1a ~ 2a, all requires to evaluate after inspection.But due to above-mentioned, current China drainpipe detecting and assess effectiveness are generally on the low side, cannot reach the requirement of this code.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of drainpipe detecting and the appraisal procedure of applying handheld video and closed circuit TV, the efficiency of China's drainpipe detecting and evaluation can be improved.
To achieve these goals, the technical solution used in the present invention is:
Apply drainpipe detecting and the appraisal procedure of handheld video and closed circuit TV, comprise the steps:
Step one, application handheld video carries out Preliminary detection;
Step 2, utilizes the detection data of handheld video, calculates as follows:
(1) pipe deforming rate
obtain pipe deforming degree;
(2) pipeline break rate/rate of caving in
obtain pipeline break/degree of caving in;
(3) pipe joint dislocation rate
obtain pipe joint degree of misalignment;
(4) pipe joint gives prominence to rate
obtain pipeline and give prominence to interface/poling degree;
(5) this pipeline obstruction rate
obtain pipeline obstruction degree;
Wherein, d
ofor the green diameter of drainage pipe, d
minfor pipeline be out of shape in the vertical direction or the horizontal direction after minimum diameter; θ
bfor the angle that the circular arc place pipe circumference of fracture/collapsed portion is corresponding; G is interface dislocation distance, and t is the wall thickness of sewage conduct; L
ifor the length that arm is outstanding in main, d is the diameter of main; A
cLcross-section area shared by obturator, A is the original cross-section area of sewage conduct;
Step 3, according to result of calculation, classify according to following standard:
(1) if η
d<10, be then judged as Class1, if 10≤η
d<50, be then judged as type 2, if η
d>=50, be then judged as type 3;
(2) if 10≤η
b<50, be then judged as type 2, if η
b>=50, be then judged as type 3;
(3) if η
dJ<50, be then judged as Class1, if 50≤η
dJ<150, be then judged as type 2, if η
dJ>=150, be then judged as type 3;
(4) if η
i<10, be then judged as Class1, if 10≤η
i<80, be then judged as type 2, if η
i>=80, be then judged as type 3;
(5) if η
cL<20, be then judged as Class1, if 20≤η
cL<50, be then judged as type 2, if η
cL>=50, be then judged as type 3;
Step 4, according to classification results, performs and operates as follows:
(1) Class1: do not process, only used handheld video again to detect in 24 months;
(2) type 2: use CCTV to do detailed detection, judge whether to need repair process according to result;
(3) type 3: directly carry out repair process.
Handheld video is utilized to carry out the detection of arm housed joint/misconnection: if rainwater arm access trunk sewer or non-name sewage pipe access main, to be then judged as type 2; If branch sewer access Storm-water sewer, be then judged as type 3.
Handheld video is utilized to carry out oozing degree detecting in underground water: if drainage pipe has dripping phenomenon, to be then judged as Class1; If Groundwater formation current enter drainage pipe, be then judged as type 2; If Groundwater formation water column or gush and enter drainage pipe, be then judged as type 3.
Compared with prior art, first the present invention adopts handheld video to carry out Preliminary detection judgement to drainage pipe inner case, then according to judging whether type selecting needs to carry out CCTV detection again, this invention can improve the efficiency of China's urban discharging pipeline detecting and assessing effectively, reduce the workload of drainage pipe cleaning and closed circuit TV detection, use manpower and material resources sparingly, effectively can detect the defect of pipeline that situation is serious simultaneously, trouble-saving generation, ensures the safe operation of urban drainage pipe network.
Accompanying drawing explanation
Accompanying drawing is the inventive method schematic diagram.
Embodiment
Embodiments of the present invention are described in detail below in conjunction with drawings and Examples.
As shown in drawings, general thought of the present invention is: application QV, as the first step of pipe detection, sets up the pipeline situation appraisal procedure detected based on QV, pipeline is divided into 3 classes.Class1 is the pipeline presenting obvious good condition, and this kind of pipeline need not use CCTV rechecking, only need within 24 months, use QV again to detect.Type 3 is that very serious defect has appearred in pipeline, and what this kind of pipeline was badly in need of is corresponding reclamation activities, also can omit CCTV and check.Type 2 is the pipelines between above two classes, this kind of pipeline situation is fuzzy, cannot judge according to QV video, needs to use CCTV detailed survey, such as observe the out-of-flatness of pipe joint place but do not see the degree of dislocation, or cannot inside be seen clearly due to shooting light problem.
Detect the kind as far as possible reducing defect in the appraisal procedure of defect at QV, mostly occurring in the defect that details place and QV are difficult to detect as deleted, merging defect pipeline situation being produced to similar effect.Final appraisal procedure of the present invention comprises 7 kinds of defects: ooze (Groundwater infiltration) in distortion (Deformation), cave in/rupture (Break/Collapse), interface dislocation (Displaced Joint), the outstanding mouth of pipe/poling (Intruding Connections), arm housed joint/misconnection (Unauthorized/Misconnected Branch), blocking (Clogging), underground water.Corresponding characteristic quantity is respectively defined to measure its defect degree for each defect.
Consider that the testing goal of QV is classified fast to pipeline, instead of detect the number of the defect that pipeline occurs exactly.Therefore the type of regulation pipeline equals the grade that most major defect in the tube occurs.
Defect definition and grading method as follows:
1) (Deformation) is out of shape
Definition: initial pipeline section there occurs obvious change.Flexible pipe such as bellows, plastic tube, pitch tube ratio are easier to deform, but usually do not lose the integrity of structure.
Classification: pipe deforming order of severity deformation rate is weighed:
D
ofor the green diameter of drainage pipe, d
minfor pipeline be out of shape in the vertical direction or the horizontal direction after minimum diameter.
Deformation rate can be detected in the image obtained by QV and obtain.According to the size of deformation rate, the degree of pipe deforming can be carried out classification, it is as shown in the table,
The classification of table 1 pipe deforming
2) rupture/cave in (Break/Collapse)
Definition: dislocation significantly occurs pipeline breaking part and movement deviate from original position, is called fracture, when section area loss is greater than 50%, pipeline has completely lost the integrity of structure, is called and caves in.
Classification: pipeline break/following physical quantity of the order of severity of caving in is weighed:
θ in formula
bfor the angle that the circular arc place pipe circumference of fracture/collapsed portion is corresponding.
According to η
b, the classification of severity that sewage conduct can be ruptured/caves in, it is as shown in the table.
Table 2 pipeline break/classification of caving in
Pipeline break is serious structural defect, finds once tested, should take further measures immediately, so there is no Class1, and when caving in, the structural integrity of pipeline completely loses, and is type 3.
3) interface dislocation (Displaced Joint)
Definition: pipeline and adjacent channel misplace at jointing, pipeline decentraction.
Classification: the order of severity of interface dislocation can represent by following physical amount:
In formula, g is interface dislocation distance, and t is the wall thickness of sewage conduct.
It is as shown in the table in the classification of the interface dislocation order of severity.
Table 3 interface dislocation classification
4) outstanding interface/poling (Intruding Connections)
Definition: in main drain, there is outstanding part at arm access port place, and main sectional area is reduced, and this situation is called outstanding interface; If arm passes across main, not only have impact on the sectional area of main, and have a significant impact pipeline configuration, this situation is called poling, and poling is that maximum interface is given prominence to.
Classification: the outstanding following physical quantity of interface represents,
In formula, L
ifor the length that arm is outstanding in main, d is the diameter of main.
According to η
i, pipeline is given prominence to the defect level classification of interface/poling, it is as shown in the table.
Interface/poling classification given prominence to by table 4
5) arm housed joint/misconnection (Unauthorized/Misconnected Branch)
Definition: arm housed joint refers to that not clear arm accesses the main between two inspection shafts, increases the flow of main; Arm misconnection refers to the misconnection between property management.
Classification: the order of severity of arm housed joint/misconnection cannot quantification be expressed, and mainly consider from the conduit types of housed joint/misconnection, it is as shown in the table
Table 5 arm housed joint/misconnection classification
6) pipeline obstruction (Clogging)
Definition: refer to that pipeline section is obstructed, comprises bottom alluvial, constructional rubbish obstruction, tree root invasion, tube wall attachment dirt, residual wall/dam root etc., makes discharge section area be less than primitive pipeline.
Classification: pipeline obstruction can quantize with following formula:
In formula, A
cLcross-section area shared by obturator, A is the original cross-section area of sewage conduct.
According to η
cL, the defect level can charged into tree root carries out classification, and it is as shown in the table.
The classification of table 6 pipeline obstruction
7) ooze in underground water (Infiltration)
, by there are the interface destroyed, the tube wall occurring hole or other structural defects of pipeline in definition: ooze in underground water and refer to that underground water enters drainage pipe inside.
Ooze in underground water and usually occur, as broken/caving in other defect.
The order of severity of oozing in underground water cannot according to QV video quantizing, and classification adopts text description as shown in table 7.
Classification is oozed in table 7 underground water
Claims (3)
1. apply drainpipe detecting and the appraisal procedure of handheld video and closed circuit TV, it is characterized in that, comprise the steps:
Step one, application handheld video carries out Preliminary detection;
Step 2, utilizes the detection data of handheld video, calculates as follows:
(1) pipe deforming rate
obtain pipe deforming degree;
(2) pipeline break rate/rate of caving in
obtain pipeline break/degree of caving in;
(3) pipe joint dislocation rate
obtain pipe joint degree of misalignment;
(4) pipe joint gives prominence to rate
obtain pipeline and give prominence to interface/poling degree;
(5) this pipeline obstruction rate
obtain pipeline obstruction degree;
Wherein, d
ofor the green diameter of drainage pipe, d
minfor pipeline be out of shape in the vertical direction or the horizontal direction after minimum diameter; θ
bfor the angle that the circular arc place pipe circumference of fracture/collapsed portion is corresponding; G is interface dislocation distance, and t is the wall thickness of sewage conduct; L
ifor the length that arm is outstanding in main, d is the diameter of main; A
cLcross-section area shared by obturator, A is the original cross-section area of sewage conduct;
Step 3, according to result of calculation, classify according to following standard:
(1) if η
d< 10, be then judged as Class1, if 10≤η
d< 50, be then judged as type 2, if η
d>=50, be then judged as type 3;
(2) if 10≤η
b< 50, be then judged as type 2, if η
b>=50, be then judged as type 3;
(3) if η
dJ< 50, be then judged as Class1, if 50≤η
dJ< 150, be then judged as type 2, if η
dJ>=150, be then judged as type 3;
(4) if η
i< 10, be then judged as Class1, if 10≤η
i< 80, be then judged as type 2, if η
i>=80, be then judged as type 3;
(5) if η
cL< 20, be then judged as Class1, if 20≤η
cL< 50, be then judged as type 2, if η
cL>=50, be then judged as type 3;
Step 4, according to classification results, performs and operates as follows:
(1) Class1: do not process, only used handheld video again to detect in 24 months;
(2) type 2: use CCTV to do detailed detection, judge whether to need repair process according to result;
(3) type 3: directly carry out repair process.
2. apply drainpipe detecting and the appraisal procedure of handheld video and closed circuit TV according to claim 1, it is characterized in that, handheld video is utilized to carry out the detection of arm housed joint/misconnection: if rainwater arm access trunk sewer or non-name sewage pipe access main, to be then judged as type 2; If branch sewer access Storm-water sewer, be then judged as type 3.
3. apply drainpipe detecting and the appraisal procedure of handheld video and closed circuit TV according to claim 1, it is characterized in that, utilize handheld video to carry out oozing degree detecting in underground water: if drainage pipe has dripping phenomenon, to be then judged as Class1; If Groundwater formation current enter drainage pipe, be then judged as type 2; If Groundwater formation water column or gush and enter drainage pipe, be then judged as type 3.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104595728B (en) * | 2015-01-25 | 2017-11-07 | 上海市政工程设计研究总院（集团）有限公司 | The warning monitoring system and its method of work of a kind of underground piping interface seepage |
| CN107238413A (en) * | 2017-06-30 | 2017-10-10 | 合肥贺财工程项目管理有限公司 | A kind of water pipe sampled measurements and monitoring screening system |
| CN109237307B (en) * | 2018-10-12 | 2020-03-24 | 福建省高创建设工程有限公司 | Method for automatically cutting collapsed substances of underground drainage pipeline to restore tubular shape |
| CN110656696A (en) * | 2019-09-24 | 2020-01-07 | 深圳市海腾建设工程有限公司 | Detection and dredging method of drainage pipeline, pipeline robot and medium |
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