CN103423596A - Drainage pipeline detection and assessment method using handheld video and closed circuit television - Google Patents

Abstract

A drainage pipeline detection and assessment method using a handheld video and a closed circuit television uses the handheld video for primary detection, and by the utilization of detection data of the handheld video, a pipeline deformation degree, a pipeline break/collapse degree, a pipeline joint displacement degree, a pipeline intruding connection degree and a pipeline clogging degree are obtained through calculation. According to calculated results, classification is performed according to standards, and corresponding operation is executed according to classified results. The efficiency of urban drainage pipeline detection and assessment in China can be effectively improved, workloads of drainage pipeline cleaning and closed circuit television detection are reduced, manpower and material resources are saved, meanwhile, pipeline defects with serious conditions can be effectively detected, accidents can be prevented from happening, and safe operation of an urban drainage network can be guaranteed.

Description

A kind of drainpipe detecting and appraisal procedure of applying hand-held video and closed circuit TV

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 of applying hand-held 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 construction development rapidly, but the management system of the regularly detection of supporting pipeline and maintenance develops hysteresis with it, 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 the drainpipe detecting technology that a kind of quilt is accepted extensively both at home and abroad, it can record the state of most of defect of pipeline full and accurately, lock accurately the defect position, but require to detect front scavenge pipe road inner barrier thing and reduce water level, the CCTV detection efficiency is low, operation and interpretation of result process complexity, high to personnel qualifications, and China city does not have the ability that guarantees that pipeline cleans before detection at present, can not guarantee that enough manpower and materials drop into the detecting and assessing of pipeline, therefore the difficulty that this technology is promoted on a large scale in China is larger.Hand-held 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 form, camera can see through the mouth of pipe and take pipeline situation video in inspection shaft, do not require the reduction water level, but shortcoming is to position defect, defects detection is not careful.Hand-held video has obtained application at China's urban, but not yet set up at present the evaluating method for hand-held video both at home and abroad, therefore the great majority detection is to rely on experienced operator to carry out the scene judgement, there is no further statistics and deep evaluation analysis, caused the waste that detects resource and testing result.

" urban drainage pipe detection and assessment technology rules " regulation of China's issue in the recent period, the drainage pipe proof cycle that the structural situation of take is purpose is 5～10 years, the proof cycle that the functional situation of take is purpose is 1a～2a, after checking, all requires to be estimated.But, due to above-mentioned, China's drainpipe detecting and assess effectiveness are generally on the low side at present, can't reach the requirement of these rules.

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 appraisal procedure of applying hand-held video and closed circuit TV, can improve the efficiency of China's drainpipe detecting and evaluation.

To achieve these goals, the technical solution used in the present invention is:

A kind of drainpipe detecting and appraisal procedure of applying hand-held video and closed circuit TV, comprise the steps:

Step 1, apply hand-held video and carry out Preliminary detection;

Step 2, utilize the detection data of hand-held video, calculates as follows:

(1) pipe deforming rate Obtain the pipe deforming degree;

(2) manage the first fracture rate/rate of caving in Obtain the pipeline break/degree of caving in;

(3) pipe joint dislocation rate

Obtain the pipe joint degree of misalignment;

(4) the outstanding rate of pipe joint

Obtain the outstanding interface of pipeline/poling degree;

(5) this pipeline obstruction rate

Obtain the pipeline obstruction degree;

Wherein, d _oFor the green diameter of drainage pipe, d _minFor pipeline minimum diameter after distortion in the vertical direction or on substantially horizontal; θ _BAngle corresponding to circular arc place pipe circumference for the part that ruptures/cave in; G is interface dislocation distance, the wall thickness that t is sewage conduct; L _IFor arm outstanding length in main, the diameter that d is main; A _CLFor the shared cross-section area of obturator, A is the original cross-section area of sewage conduct;

Step 3, according to result of calculation, according to following standard, classified:

(1) if η _D<10, be judged as Class1, if 10≤η _D<50, be judged as type 2, if η _D>=50, be judged as type 3;

(2) if 10≤η _B<50, be judged as type 2, if η _B>=50, be judged as type 3;

(3) if η _DJ<50, be judged as Class1, if 50≤η _DJ<150, be judged as type 2, if η _DJ>=150, be judged as type 3;

(4) if η _I<10, be judged as Class1, if 10≤η _I<80, be judged as type 2, if η _I>=80, be judged as type 3;

(5) if η _CL<20, be judged as Class1, if 20≤η _CL<50, be judged as type 2, if η _CL>=50, be judged as type 3;

Step 4, according to classification results, carry out operation as follows:

(1) Class1: do not process, only in 24 months, use hand-held video again to detect;

(2) type 2: use CCTV to do detailed detection, according to result, judge whether to need repair process;

(3) type 3: directly carry out repair process.

2, apply according to claim 1 drainpipe detecting and the appraisal procedure of hand-held video and closed circuit TV, it is characterized in that, utilize hand-held video to carry out the detection of arm housed joint/misconnection: if rainwater arm access trunk sewer or name sewage pipe access main not are judged as type 2; If branch sewer access rainwater main, be judged as type 3.

3, apply according to claim 1 drainpipe detecting and the appraisal procedure of hand-held video and closed circuit TV, it is characterized in that, utilize hand-held video to carry out in underground water oozing degree detecting: if drainage pipe has dripping phenomenon, to be judged as Class1; If underground water forms current and enters drainage pipe, be judged as type 2; Enter drainage pipe if underground water forms water column or gushs, be judged as type 3.

Compared with prior art, at first the present invention adopts hand-held video to carry out the Preliminary detection judgement to the drainage pipe inner case, then according to judging whether type selecting needs to carry out the CCTV detection again, this invention can improve the efficiency of China's urban discharging pipeline detecting and assessing effectively, reduce the workload that drainage pipe cleans and closed circuit TV detects, use manpower and material resources sparingly, can effectively detect the defect of pipeline that situation is serious simultaneously, trouble-saving generation, ensure the safe operation of urban drainage pipe network.

The accompanying drawing explanation

Accompanying drawing is the inventive method schematic diagram.

Embodiment

Describe embodiments of the present invention 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, and pipeline is divided into to 3 classes.Class1 is the pipeline that presents obvious good condition, and this class pipeline need not be used the CCTV rechecking, only need within 24 months, use QV again to detect and get final product.Type 3 is that very serious defect has appearred in pipeline, and what this class 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 class pipeline situation is fuzzy, can't judge according to the QV video, needs to use the CCTV detailed survey, for example observe the out-of-flatness of pipe joint place but do not see the degree of dislocation, or can't see inside clearly owing to taking the light problem.

Detect in the appraisal procedure of defect the kind of reduce injection defect as far as possible at QV, mostly occur in the details place as deleted and defect that QV is difficult to detect, merge the pipeline situation is produced to the defect of similar impact.Final appraisal procedure of the present invention comprises 7 kinds of defects: distortion Deformation) I (Break/Collapse) I interface dislocation D work SPlaCedJO work nt that caves in/rupture), the outstanding mouth of pipe/poling IntrudingConnections) arm housed joint/misconnection Unauthorized/MisconnectedBranch) stop up in (Clogging) underground water and ooze above work on of Groundwater work nf work ltra).Define respectively corresponding characteristic quantity for each defect and measured its defect degree.

The testing goal of considering QV is that pipeline is classified fast, rather than detects exactly the number of the defect of pipeline appearance.Therefore the type of regulation pipeline equals to occur in this pipe the grade of major defect.

Defect definition and grading method are as follows:

1) the upper work on of distortion Deforma)

Definition: obvious change has occurred in initial pipeline section.Flexible pipe is easier to deform as bellows, plastic tube, pitch tube ratio, but does not usually lose the integrity of structure.

Classification: the pipe deforming order of severity is weighed by deformation rate:

${\mathrm{\&eta;}}_D=\frac{d_o-d_{\min }}{d_o}\&times;100\%$

D _oFor the green diameter of drainage pipe, d _minFor pipeline minimum diameter after distortion in the vertical direction or on substantially horizontal.

Deformation rate can be detected in the image obtained and be obtained by QV.According to the size of deformation rate, the degree of pipe deforming can be carried out to classification, it is as shown in the table,

The classification of table 1 pipe deforming

2) (Break/Collapse) ruptures/caves in

Define: dislocation significantly occurs and has moved and departed from original position in the pipeline breaking part, is called fracture, and when the section area loss is greater than 50%, pipeline has completely lost the integrity of structure, is called and caves in.

Classification: the pipeline break/order of severity of caving in is weighed by following physical quantity:

${\mathrm{\&eta;}}_B=\frac{{\mathrm{\&theta;}}_B}{360}\&times;100\%$

θ in formula _BAngle corresponding to circular arc place pipe circumference for the part that ruptures/cave in.

According to η _B, the classification of severity that sewage conduct can be ruptured/caves in, it is as shown in the table.

The table 2 pipeline break/classification of caving in

Pipeline break is serious structural defect, once tested, finds, and should take further measures immediately, therefore 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, the pipeline decentraction.

Classification: the order of severity of interface dislocation can mean by following physical quantity:

${\mathrm{\&eta;}}_{\mathrm{DJ}}=\frac{g}{t}\&times;100\%$

In formula, g is interface dislocation distance, the wall thickness that t is 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, makes the main sectional area reduce, and this situation is called outstanding interface; If arm passes across main, not only affected the sectional area of main, and pipeline configuration has been had a significant impact, this situation is called poling, and poling is that maximum interface is outstanding.

Classification: give prominence to interface and mean by following physical quantity,

${\mathrm{\&eta;}}_I=\frac{L_I}{d}\&times;100\%$

In formula, L _IFor arm outstanding length in main, the diameter that d is main.

According to η _I, by the defect level classification of the outstanding interface/poling of pipeline, it is as shown in the table.

Table 4 is given prominence to interface/poling classification

5) arm housed joint/misconnection (Unauthorized/Misconnected Branch)

Definition: the arm housed joint refers to the main between not clear two inspection shafts of arm access, has increased the flow of main; The arm misconnection refer to and property management between misconnection.

Classification: the order of severity of arm housed joint/misconnection can't quantification be expressed, and mainly from the conduit types of housed joint/misconnection, considers, it is as shown in the table

Table 5 arm housed joint/misconnection classification

6) pipeline obstruction (Clogging)

Definition: be obstructed in cross section, vial road, comprises that bottom alluvial, constructional rubbish block, tree root is invaded, tube wall adheres to dirt, residual wall/dam root etc., makes discharge section area be less than primitive pipeline.

Classification: pipeline obstruction can quantize with following formula:

${\mathrm{\&eta;}}_{\mathrm{CL}}\text{=}\frac{A_{\mathrm{CL}}}{A}\&times;100\%$

In formula, A _CLFor the shared cross-section area of obturator, A is the original cross-section area of sewage conduct.

According to η _CL, the defect level that can charge into tree root carries out classification, and it is as shown in the table.

The classification of table 6 pipeline obstruction

7) ooze (Infiltration) in underground water

Definition: ooze in underground water and refer to that underground water enters drainage pipe inside, by other structural defects of the interface of failure, the tube wall that hole occurs or pipeline.

Ooze in underground water and usually follow other defect to occur, as break/cave in etc.

The order of severity of oozing in underground water can't be according to the QV video quantizing, and classification adopts text description as shown in table 7.

Ooze classification in table 7 underground water

Claims (3)

1. drainpipe detecting and an appraisal procedure of applying hand-held video and closed circuit TV, is characterized in that, comprises the steps:

Step 1, apply hand-held video and carry out Preliminary detection;

Step 2, utilize the detection data of hand-held video, calculates as follows:

(1) pipe deforming rate

Obtain the pipe deforming degree;

(2) the pipeline break rate/rate of caving in

Obtain the pipeline break/degree of caving in;

(3) pipe joint dislocation rate

Obtain the pipe joint degree of misalignment;

(4) the outstanding rate of pipe joint Obtain the outstanding interface of pipeline/poling degree;

(5) this pipeline obstruction rate

Obtain the pipeline obstruction degree;

Wherein, d _oFor the green diameter of drainage pipe, d _minFor pipeline minimum diameter after distortion in the vertical direction or on substantially horizontal; θ _BAngle corresponding to circular arc place pipe circumference for the part that ruptures/cave in; G is interface dislocation distance, the wall thickness that t is sewage conduct; L _IFor arm outstanding length in main, the diameter that d is main; A _CLFor the shared cross-section area of obturator, A is the original cross-section area of sewage conduct;

Step 3, according to result of calculation, according to following standard, classified:

(1) if η _D<10, be judged as Class1, if 10≤η _D<50, be judged as type 2, if η _D>=50, be judged as type 3;

(2) if 10≤η _B<50, be judged as type 2, if η _B>=50, be judged as type 3;

(3) if η _DJ<50, be judged as Class1, if 50≤η _DJ<150, be judged as type 2, if η _DJ>=150, be judged as type 3;

(4) if η _I<10, be judged as Class1, if 10≤η _I<80, be judged as type 2, if η _I>=80, be judged as type 3;

(5) if η _CL<20, be judged as Class1, if 20≤η _CL<50, be judged as type 2, if η _CL>=50, be judged as type 3;

Step 4, according to classification results, carry out operation as follows:

(1) Class1: do not process, only in 24 months, use hand-held video again to detect;

(2) type 2: use CCTV to do detailed detection, according to result, judge whether to need repair process;

(3) type 3: directly carry out repair process.

2. apply according to claim 1 drainpipe detecting and the appraisal procedure of hand-held video and closed circuit TV, it is characterized in that, utilize hand-held video to carry out the detection of arm housed joint/misconnection: if rainwater arm access trunk sewer or name sewage pipe access main not are judged as type 2; If branch sewer access rainwater main, be judged as type 3.

3. apply according to claim 1 drainpipe detecting and the appraisal procedure of hand-held video and closed circuit TV, it is characterized in that, utilize hand-held video to carry out in underground water oozing degree detecting: if drainage pipe has dripping phenomenon, to be judged as Class1; If underground water forms current and enters drainage pipe, be judged as type 2; Enter drainage pipe if underground water forms water column or gushs, be judged as type 3.

Images