CN103423596B - A kind of drainpipe detecting and appraisal procedure applying handheld video and closed circuit TV - Google Patents

Abstract

Translated fromChinese

一种应用手持视频和闭路电视的排水管道检测及评估方法，应用手持视频进行初步检测，利用手持视频的检测数据，计算获取管道变形程度、管道断裂/坍塌程度、管道接口错位程度、管道突出接口/穿管程度和管道阻塞程度，根据计算结果，按照标准进行分类，根据分类结果，执行相应操作，本发明能够有效地提高我国城市排水管道检测和评价的效率，减少排水管道清洗和闭路电视检测的工作量，节省人力物力，同时能够有效地检测出状况严重的管道缺陷，预防事故的发生，保障城市排水管网的安全运行。

A drainage pipeline detection and evaluation method using handheld video and closed-circuit television. The handheld video is used for preliminary detection, and the detection data of the handheld video is used to calculate and obtain the degree of deformation of the pipeline, the degree of fracture/collapse of the pipeline, the degree of misalignment of the pipeline interface, and the protruding interface of the pipeline /Pipe penetration and pipeline blockage, according to the calculation results, classify according to the standard, and perform corresponding operations according to the classification results. The present invention can effectively improve the efficiency of my country's urban drainage pipeline detection and evaluation, and reduce drainage pipeline cleaning and closed-circuit television detection. The workload can save manpower and material resources, and at the same time, it can effectively detect serious pipeline defects, prevent accidents, and ensure the safe operation of urban drainage network.

Description

Translated fromChinese

一种应用手持视频和闭路电视的排水管道检测及评估方法A Drainage Pipeline Detection and Evaluation Method Using Handheld Video and CCTV

技术领域technical field

本发明涉及一种排水管道的缺陷检测和状况评估方法，特别涉及一种应用手持视频和闭路电视的排水管道检测及评估方法。The invention relates to a defect detection and condition evaluation method of a drainage pipeline, in particular to a drainage pipeline detection and evaluation method using a handheld video and a closed-circuit television.

背景技术Background technique

近年来随着我国城镇化进程的加快，城市排水管网建设发展迅速，但与之配套的管道定期检测和维护的管理体系却发展滞后，直到某些城市管道已发生严重缺陷并造成严重损失和事故，其重要性才引起了关注。闭路电视(Closed Circuit Television,CCTV)是一种被国内外广泛接受的排水管道检测技术，它能够详实地记录大多数管道缺陷的状态，精准地锁定缺陷所在位置，但要求检测前清除管道内部障碍物及降低水位，CCTV检测效率低，操作和结果分析过程复杂，对人员素质要求高，而目前我国城市并不具备保证管道在检测前清洗的能力，也不能保证足够的人力物力投入管道的检测和评价，因此该技术在我国进行大范围推广的难度较大。手持视频(QuickView○R,QV)是一种操作更为简便快捷的视频检测方式，它由摄像头，可调节长度的操作杆和控制单元组成，摄像头可在检查井中透过管口拍摄管道状况视频，不要求降低水位，但缺点是无法对缺陷进行定位，缺陷检测不细致。手持视频已经在我国部分城市得到了应用，但目前国内外尚未建立针对手持视频的评价方法，因此大多数检测是依靠有经验的操作工人进行现场判断，没有进一步的统计和深入的评价分析，造成了检测资源和检测结果的浪费。In recent years, with the acceleration of urbanization in our country, the construction of urban drainage pipe network has developed rapidly, but the management system for regular inspection and maintenance of the matching pipes has lagged behind, until some urban pipes have serious defects and caused serious losses and Accidents, the importance of which attracted attention. Closed Circuit Television (CCTV) is a drainage pipeline inspection technology widely accepted at home and abroad. It can record the status of most pipeline defects in detail and accurately lock the location of the defects, but requires the internal obstacles of the pipeline to be removed before detection. The detection efficiency of CCTV is low, the operation and result analysis process is complicated, and the quality requirements of personnel are high. At present, cities in our country do not have the ability to ensure that pipelines are cleaned before detection, nor can they guarantee enough manpower and material resources to invest in pipeline detection. Therefore, it is difficult to promote this technology on a large scale in my country. Handheld video (QuickView○R, QV) is a video detection method that is easier and faster to operate. It consists of a camera, an adjustable length joystick and a control unit. The camera can shoot a video of the pipeline condition through the nozzle in the inspection well , It is not required to lower the water level, but the disadvantage is that the defect cannot be located, and the defect detection is not meticulous. Handheld video has been applied in some cities in my country, but at present, there is no evaluation method for handheld video at home and abroad, so most of the detection is based on experienced operators to make on-site judgments, without further statistics and in-depth evaluation and analysis, resulting in It reduces the waste of detection resources and detection results.

我国近期发布的《城镇排水管道检测与评估技术规程》规定，以结构性状况为目的的排水管道检查周期为5～10年，以功能性状况为目的的检查周期为1a～2a，检查之后均要求进行评价。但由于上述的原因，目前我国排水管道检测和评价效率普遍偏低，无法达到该规程的要求。my country's recently issued "Technical Regulations for the Inspection and Evaluation of Urban Drainage Pipelines" stipulates that the inspection cycle of drainage pipes for structural conditions is 5 to 10 years, and the inspection cycle for functional conditions is 1a to 2a. Request a review. However, due to the above reasons, the detection and evaluation efficiency of drainage pipelines in my country is generally low at present, and cannot meet the requirements of the regulations.

发明内容Contents of the invention

为了克服上述现有技术的缺点，本发明的目的在于提供一种应用手持视频和闭路电视的排水管道检测及评估方法，可提高我国排水管道检测和评价的效率。In order to overcome the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a drainage pipeline detection and evaluation method using handheld video and closed-circuit television, which can improve the efficiency of drainage pipeline detection and evaluation in my country.

为了实现上述目的，本发明采用的技术方案是：In order to achieve the above object, the technical scheme adopted in the present invention is:

一种应用手持视频和闭路电视的排水管道检测及评估方法，包括如下步骤：A drainage pipeline detection and evaluation method using handheld video and closed-circuit television, comprising the following steps:

步骤一，应用手持视频进行初步检测；Step 1, use handheld video for preliminary detection;

步骤二，利用手持视频的检测数据，进行如下计算：Step 2, using the detection data of the handheld video, perform the following calculation:

(1)管道变形率获取管道变形程度；(1) Pipe deformation rate Obtain the deformation degree of the pipeline;

(2)管道断裂率/坍塌率获取管道断裂/坍塌程度；(2) Pipeline fracture rate/collapse rate Obtain the degree of pipeline fracture/collapse;

(3)管道接口错位率获取管道接口错位程度；(3) Dislocation rate of pipeline interface Obtain the misalignment degree of the pipeline interface;

(4)管道接口突出率获取管道突出接口/穿管程度；(4) Protrusion rate of pipeline interface Obtain the pipe protruding interface/pipe penetration degree;

(5)该管道阻塞率获取管道阻塞程度；(5) The pipeline blockage rate Obtain the degree of pipeline blockage;

其中，d_o为排水管道的原始直径，d_min为管道在垂直方向或水平方向上变形后的最小直径；θ_B为断裂/坍塌部分的圆弧所在管道圆周对应的角度；g为接口错位距离，t为污水管道的壁厚；L_I为支管在干管中突出的长度，d为干管的直径；A_CL为阻塞物所占的横截面积，A为污水管道原有的横截面积；Among them, d_o is the original diameter of the drainage pipe, d_min is the minimum diameter of the pipe after deformation in the vertical or horizontal direction; θ_B is the angle corresponding to the pipe circumference where the arc of the fractured/collapsed part is located; g is the dislocation distance of the interface , t is the wall thickness of the sewage pipe; L_I is the protruding length of the branch pipe in the main pipe, d is the diameter of the main pipe; A_CL is the cross-sectional area occupied by the obstruction, and A is the original cross-sectional area of the sewage pipe ;

步骤三，根据计算结果，按照如下标准进行分类：Step 3, according to the calculation results, classify according to the following criteria:

(1)如果η_D<10，则判断为类型1，如果10≤η_D<50，则判断为类型2，如果η_D≥50，则判断为类型3；(1) If η_D < 10, it is judged as type 1; if 10≤η_D <50, it is judged as type 2; if η_D ≥ 50, it is judged as type 3;

(2)如果10≤η_B<50，则判断为类型2，如果η_B≥50，则判断为类型3；(2) If 10≤η_B <50, it is judged as type 2, and if η_B ≥50, it is judged as type 3;

(3)如果η_DJ<50，则判断为类型1，如果50≤η_DJ<150，则判断为类型2，如果η_DJ≥150，则判断为类型3；(3) If η_DJ <50, it is judged as type 1, if 50≤η_DJ <150, it is judged as type 2, if η_DJ ≥ 150, it is judged as type 3;

(4)如果η_I<10，则判断为类型1，如果10≤η_I<80，则判断为类型2，如果η_I≥80，则判断为类型3；(4) If η_I < 10, it is judged as Type 1, if 10≤η_I <80, it is judged as Type 2, and if η_I ≥ 80, it is judged as Type 3;

(5)如果η_CL<20，则判断为类型1，如果20≤η_CL<50，则判断为类型2，如果η_CL≥50，则判断为类型3；(5) If η_CL <20, it is judged as type 1; if 20≤η_CL <50, it is judged as type 2; if η_CL ≥ 50, it is judged as type 3;

步骤四，根据分类结果，执行如下操作：Step 4, according to the classification result, perform the following operations:

(1)类型1：不做处理，仅在24个月内使用手持视频再次检测；(1) Type 1: no treatment, only retesting with handheld video within 24 months;

(2)类型2：使用CCTV做详细检测，根据结果判断是否需要修复处理；(2) Type 2: Use CCTV for detailed inspection, and judge whether repairing is required based on the results;

(3)类型3：直接进行修复处理。(3) Type 3: Perform repair processing directly.

利用手持视频进行支管暗接/错接的检测：如果雨水支管接入污水干管或者未名污水管接入干管，则判断为类型2；如果污水支管接入雨水干管，则判断为类型3。Use hand-held video to detect the dark/wrong connection of branch pipes: if the rainwater branch pipe is connected to the sewage main pipe or the unnamed sewage pipe is connected to the main pipe, it will be judged as type 2; if the sewage branch pipe is connected to the rainwater main pipe, it will be judged as type 2 3.

利用手持视频进行地下水内渗程度检测：如果排水管道有滴水现象，则判断为类型1；如果地下水形成水流进入排水管道，则判断为类型2；如果地下水形成水柱或喷涌进入排水管道，则判断为类型3。Use handheld video to detect the degree of groundwater infiltration: if there is dripping in the drainage pipe, it is judged as type 1; if the groundwater forms a flow into the drainage pipe, it is judged as type 2; if the groundwater forms a water column or gushes into the drainage pipe, it is judged as type 2 Type 3.

与现有技术相比，本发明首先采用手持视频对排水管道内部情况进行初步检测判断，然后根据判断类型选择是否再需要进行CCTV检测，该发明能够有效地提高我国城市排水管道检测和评价的效率，减少排水管道清洗和闭路电视检测的工作量，节省人力物力，同时能够有效地检测出状况严重的管道缺陷，预防事故的发生，保障城市排水管网的安全运行。Compared with the prior art, the present invention first uses handheld video to conduct preliminary detection and judgment on the internal conditions of the drainage pipe, and then selects whether to perform CCTV detection according to the judgment type. This invention can effectively improve the efficiency of detection and evaluation of urban drainage pipes in my country , reduce the workload of drainage pipeline cleaning and CCTV detection, save manpower and material resources, and at the same time, it can effectively detect serious pipeline defects, prevent accidents, and ensure the safe operation of urban drainage network.

附图说明Description of drawings

附图是本发明方法示意图。Accompanying drawing is a schematic diagram of the method of the present invention.

具体实施方式Detailed ways

下面结合附图和实施例详细说明本发明的实施方式。The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

如附图所示，本发明的总体思路是：应用QV作为管道检测的第一步，建立基于QV检测的管道状况评估方法，将管道分为3类。类型1是呈现明显良好状况的管道，这类管道没必要使用CCTV重复检查，只需在24个月之内使用QV再次检测即可。类型3是管道已出现非常严重的缺陷，这类管道急需的是相应的修复措施，也可以省略CCTV检查。类型2是介于以上两类之间的管道，这类管道状况模糊，无法根据QV视频做出判断，需要使用CCTV详查，例如观察到管道接口处不平整但看不清错位的程度，或者由于拍摄光线问题无法看清内部。As shown in the accompanying drawings, the general idea of the present invention is: use QV as the first step of pipeline detection, establish a pipeline condition assessment method based on QV detection, and divide pipelines into three categories. Type 1 is a pipeline that is clearly in good condition. This type of pipeline does not need to be re-inspected by CCTV, but only needs to be re-inspected by QV within 24 months. Type 3 is that the pipeline has very serious defects. This kind of pipeline urgently needs corresponding repair measures, and CCTV inspection can also be omitted. Type 2 is a pipe between the above two types. The condition of this kind of pipe is vague and cannot be judged based on the QV video. CCTV needs to be used for detailed inspection. Couldn't see the interior clearly due to lighting issues.

在QV检测缺陷的评估方法中尽量减少缺陷的种类，如删除大多发生在细节处而QV很难检测到的缺陷，合并对管道状况产生相似影响的缺陷。最终本发明的评估方法包括7种缺陷：变形(Deformation)、坍塌/断裂(Break/Collapse)、接口错位(Displaced Joint)、突出管口/穿管(Intruding Connections)、支管暗接/错接(Unauthorized/Misconnected Branch)、堵塞(Clogging)、地下水内渗(Groundwater infiltration)。针对每一种缺陷分别定义了相应的特征量来度量其缺损程度。In the evaluation method of QV detection defects, the types of defects should be reduced as much as possible, such as deleting defects that mostly occur in details but difficult for QV to detect, and merging defects that have similar effects on pipeline conditions. Finally, the evaluation method of the present invention includes 7 kinds of defects: deformation (Deformation), collapse/fracture (Break/Collapse), interface dislocation (Displaced Joint), protruding nozzle/pipe (Intruding Connections), branch pipe dark connection/wrong connection ( Unauthorized/Misconnected Branch), Clogging (Clogging), Groundwater infiltration (Groundwater infiltration). For each defect, the corresponding feature quantity is defined to measure its defect degree.

考虑到QV的检测目的是对管道进行快速的分类，而不是准确地检测出管道出现的缺陷的个数。因此规定管道的类型等于发生在该管中最严重缺陷的等级。Considering that the detection purpose of QV is to quickly classify the pipeline, rather than to accurately detect the number of defects in the pipeline. The type of pipe is therefore specified to be equal to the class of the most serious defect occurring in that pipe.

缺陷定义及分级方法如下：The definition and grading method of defects are as follows:

1)变形(Deformation)1) Deformation

定义：最初的管道截面发生了明显的改变。柔性管道如波纹管、塑料管、树脂管比较容易发生变形，但通常没有丧失结构的完整性。Definition: A significant change in the original pipe cross-section. Flexible piping such as bellows, plastic, and resin tubing is relatively susceptible to deformation, but usually without loss of structural integrity.

分级：管道变形严重程度用变形率衡量：Classification: The severity of pipeline deformation is measured by deformation rate:

${\mathrm{<span><span>\&eta;</span>\&eta;</span>}}_{\mathrm{<span><span>D</span>D.</span>}}<span><span>=</span>=</span>\frac{{\mathrm{<span><span>d</span>d</span>}}_{\mathrm{<span><span>o</span>o</span>}}<span><span>-</span>-</span>{\mathrm{<span><span>d</span>d</span>}}_{\mathrm{<span><span>min</span>min</span>}}}{{\mathrm{<span><span>d</span>d</span>}}_{\mathrm{<span><span>o</span>o</span>}}}<span><span>\&times;</span>\&times;</span>\mathrm{<span><span>100</span>100</span>}<span><span>\%</span>\%</span>$

d_o为排水管道的原始直径，d_min为管道在垂直方向或水平方向上变形后的最小直径。d_o is the original diameter of the drainage pipe, and d_min is the minimum diameter of the pipe deformed in the vertical or horizontal direction.

变形率可由QV检测获得的影像中求出。根据变形率的大小，可将管道变形的程度进行分级，如表所示，The deformation rate can be obtained from the image obtained by QV detection. According to the deformation rate, the degree of pipe deformation can be graded, as shown in the table,

表1管道变形分级Table 1 Classification of pipeline deformation

2)断裂/坍塌(Break/Collapse)2) Break/Collapse (Break/Collapse)

定义：管道破裂部分明显的发生错位而且已经移动偏离了原来的位置，称为断裂，当截面面积损失大于50％时，管道完全丧失了结构的完整性，称为坍塌。Definition: The broken part of the pipeline is obviously dislocated and has moved away from the original position, which is called fracture. When the cross-sectional area loss is greater than 50%, the pipeline completely loses its structural integrity, which is called collapse.

分级：管道断裂/坍塌严重程度用以下物理量衡量：Grading: The severity of pipeline fracture/collapse is measured by the following physical quantities:

${\mathrm{<span><span>\&eta;</span>\&eta;</span>}}_{\mathrm{<span><span>B</span>B</span>}}<span><span>=</span>=</span>\frac{{\mathrm{<span><span>\&theta;</span>\&theta;</span>}}_{\mathrm{<span><span>B</span>B</span>}}}{\mathrm{<span><span>360</span>360</span>}}<span><span>\&times;</span>\&times;</span>\mathrm{<span><span>100</span>100</span>}<span><span>\%</span>\%</span>$

式中θ_B为断裂/坍塌部分的圆弧所在管道圆周对应的角度。In the formula, θ_B is the angle corresponding to the circumference of the pipeline where the arc of the fractured/collapsed part is located.

根据η_B，可将污水管道断裂/坍塌的严重程度分级，如表所示。According to η_B , the severity of sewer pipe break/collapse can be graded, as shown in the table.

表2管道断裂/坍塌分级Table 2 Pipeline Fracture/Collapse Classification

管道断裂是严重的结构性缺陷，一旦被检查出，应立即采取进一步措施，因此没有类型1，当发生坍塌时，管道的结构完整性完全丧失，为类型3。A pipe fracture is a serious structural defect and once detected, further action should be taken immediately, so there is no Type 1, when a collapse occurs, the structural integrity of the pipe is completely lost, there is a Type 3.

3)接口错位(Displaced Joint)3) Displaced Joint

定义：管道与相邻管道在接口处发生错位，管道不同心。Definition: The misalignment between the pipe and the adjacent pipe at the interface, and the pipe is not concentric.

分级：接口错位的严重程度可用下列物理量表示：Classification: The severity of interface dislocation can be expressed by the following physical quantities:

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

式中，g为接口错位距离，t为污水管道的壁厚。In the formula, g is the dislocation distance of the interface, and t is the wall thickness of the sewage pipe.

接口错位严重程度的分级如表所示。The classification of the severity of interface misalignment is shown in the table.

表3接口错位分级Table 3 Classification of interface misalignment

4)突出接口/穿管(Intruding Connections)4) Intruding Connections

定义：在排水干管中，支管接入口处有突出的部分，使得干管截面积减少，这种情况称作突出接口；若支管横穿过干管，不仅影响了干管的截面积，而且对管道结构有很大影响，这种情况称作穿管，穿管是最大程度的接口突出。Definition: In the main drainage pipe, there is a protruding part at the entrance of the branch pipe, which reduces the cross-sectional area of the main pipe. This situation is called a protruding interface; if the branch pipe crosses the main pipe, it not only affects the cross-sectional area of the main pipe, but also It has a great impact on the pipeline structure. This situation is called pipe penetration, and pipe penetration is the most prominent interface.

分级：突出接口用以下物理量表示，Classification: Prominent interfaces are represented by the following physical quantities,

${\mathrm{<span><span>\&eta;</span>\&eta;</span>}}_{\mathrm{<span><span>I</span>I</span>}}<span><span>=</span>=</span>\frac{{\mathrm{<span><span>L</span>L</span>}}_{\mathrm{<span><span>I</span>I</span>}}}{\mathrm{<span><span>d</span>d</span>}}<span><span>\&times;</span>\&times;</span>\mathrm{<span><span>100</span>100</span>}<span><span>\%</span>\%</span>$

式中，L_I为支管在干管中突出的长度，d为干管的直径。In the formula, L_I is the protruding length of the branch pipe in the main pipe, and d is the diameter of the main pipe.

根据η_I，将管道突出接口/穿管的缺陷程度分级，如表所示。According to η_I , grade the defect degree of pipe protruding interface/pipe penetration, as shown in the table.

表4突出接口/穿管分级Table 4 Prominent Interface/Pipe-Through Classification

5)支管暗接/错接(Unauthorized/Misconnected Branch)5) Unauthorized/Misconnected Branch

定义：支管暗接是指不明的支管接入两个检查井之间的干管，增大了干管的流量；支管错接指与物管之间的错接。Definition: Blind connection of branch pipes refers to the connection of unknown branch pipes to the main pipe between two inspection wells, which increases the flow of the main pipe; wrong connection of branch pipes refers to the wrong connection with the property pipe.

分级：支管暗接/错接的严重程度无法定量化表达，主要从暗接/错接的管道类型考虑，如表所示Grading: The severity of blind connection/misconnection of branch pipes cannot be expressed quantitatively. It is mainly considered from the type of pipelines that are connected/misconnected, as shown in the table

表5支管暗接/错接分级Table 5 Classification of dark connection/misconnection of branch pipes

6)管道阻塞(Clogging)6) Pipeline blocking (Clogging)

定义：指管道截面受阻，包括底部淤积、建筑垃圾阻塞、树根入侵、管壁附着污垢、残墙/坝根等，使过水断面面积小于原始管道。Definition: Refers to the blockage of the pipeline section, including bottom siltation, construction waste blockage, tree root invasion, dirt attached to the pipe wall, residual wall/dam root, etc., so that the cross-sectional area of the water is smaller than the original pipeline.

分级：管道阻塞可用下式量化：Grading: Pipe blockage can be quantified by the following formula:

${\mathrm{<span><span>\&eta;</span>\&eta;</span>}}_{\mathrm{<span><span>CL</span>CL</span>}}<span><span>=</span>=</span>\frac{{\mathrm{<span><span>A</span>A</span>}}_{\mathrm{<span><span>CL</span>CL</span>}}}{\mathrm{<span><span>A</span>A</span>}}<span><span>\&times;</span>\&times;</span>\mathrm{<span><span>100</span>100</span>}<span><span>\%</span>\%</span>$

式中，A_CL为阻塞物所占的横截面积，A为污水管道原有的横截面积。In the formula, A_CL is the cross-sectional area occupied by the obstruction, and A is the original cross-sectional area of the sewage pipe.

根据η_CL，可对树根突入的缺陷程度进行分级，如表所示。According to η_CL , the defect degree of tree root intrusion can be graded, as shown in the table.

表6管道阻塞分级Table 6 Classification of pipeline blockage

7)地下水内渗(Infiltration)7) Groundwater infiltration (Infiltration)

定义：地下水内渗指地下水进入排水管道内部，通过发生破坏的接口、出现孔洞的管壁或管道其他结构性的缺陷。Definition: Groundwater infiltration refers to the entry of groundwater into the drainage pipe, passing through the damaged interface, the pipe wall with holes or other structural defects in the pipe.

地下水内渗通常伴随其他缺陷发生，如破裂/坍塌等。Groundwater infiltration usually occurs along with other defects such as rupture/collapse etc.

地下水内渗的严重程度无法根据QV视频量化，分级采用文字描述如表7所示。The severity of groundwater infiltration cannot be quantified according to the QV video, and the classification is described in text, as shown in Table 7.

表7地下水内渗分级Table 7 Groundwater infiltration classification

Claims (3)

Translated fromChinese

1.一种应用手持视频和闭路电视的排水管道检测及评估方法，其特征在于，包括如下步骤：1. A drainage pipeline detection and evaluation method using hand-held video and CCTV, is characterized in that, comprises the steps:步骤一，应用手持视频进行初步检测；Step 1, use handheld video for preliminary detection;步骤二，利用手持视频的检测数据，进行如下计算：Step 2, using the detection data of the handheld video, perform the following calculation:（1）管道变形率获取管道变形程度；(1) Pipe deformation rate Obtain the deformation degree of the pipeline;（2）管道断裂率/坍塌率获取管道断裂/坍塌程度；(2) Pipeline fracture rate/collapse rate Obtain the degree of pipeline fracture/collapse;（3）管道接口错位率获取管道接口错位程度；(3) Dislocation rate of pipeline interface Obtain the misalignment degree of the pipeline interface;（4）管道接口突出率获取管道突出接口/穿管程度；(4) Protrusion rate of pipeline interface Obtain the pipe protruding interface/pipe penetration degree;（5）该管道阻塞率获取管道阻塞程度；(5) The pipeline blockage rate Obtain the degree of pipeline blockage;其中，d_o为排水管道的原始直径，d_min为管道在垂直方向或水平方向上变形后的最小直径；θ_B为断裂/坍塌部分的圆弧所在管道圆周对应的角度；g为接口错位距离，t为污水管道的壁厚；L_I为支管在干管中突出的长度，d为干管的直径；A_CL为阻塞物所占的横截面积，A为污水管道原有的横截面积；Among them, d_o is the original diameter of the drainage pipe, d_min is the minimum diameter of the pipe after deformation in the vertical or horizontal direction; θ_B is the angle corresponding to the pipe circumference where the arc of the fractured/collapsed part is located; g is the dislocation distance of the interface , t is the wall thickness of the sewage pipe; L_I is the protruding length of the branch pipe in the main pipe, d is the diameter of the main pipe; A_CL is the cross-sectional area occupied by the obstruction, and A is the original cross-sectional area of the sewage pipe ;步骤三，根据计算结果，按照如下标准进行分类：Step 3, according to the calculation results, classify according to the following criteria:（1）如果η_D＜10，则判断为类型1，如果10≤η_D＜50，则判断为类型2，如果η_D≥50，则判断为类型3；(1) If η_D < 10, it is judged as type 1, if 10≤η_D <50, it is judged as type 2, and if η_D ≥ 50, it is judged as type 3;（2）如果10≤η_B＜50，则判断为类型2，如果η_B≥50，则判断为类型3；(2) If 10≤η_B <50, it is judged as Type 2, and if η_B ≥50, it is judged as Type 3;（3）如果η_DJ＜50，则判断为类型1，如果50≤η_DJ＜150，则判断为类型2，如果η_DJ≥150，则判断为类型3；(3) If η_DJ <50, it is judged as type 1; if 50≤η_DJ <150, it is judged as type 2; if η_DJ ≥150, it is judged as type 3;（4）如果η_I＜10，则判断为类型1，如果10≤η_I＜80，则判断为类型2，如果η_I≥80，则判断为类型3；(4) If η_I <10, it is judged as Type 1, if 10≤η_I <80, it is judged as Type 2, and if η_I ≥80, it is judged as Type 3;（5）如果η_CL＜20，则判断为类型1，如果20≤η_CL＜50，则判断为类型2，如果η_CL≥50，则判断为类型3；(5) If η_CL <20, it is judged as Type 1, if 20≤η_CL <50, it is judged as Type 2, and if η_CL ≥50, it is judged as Type 3;步骤四，根据分类结果，执行如下操作：Step 4, according to the classification result, perform the following operations:（1）类型1：不做处理，仅在24个月内使用手持视频再次检测；(1) Type 1: no treatment, only retesting with handheld video within 24 months;（2）类型2：使用CCTV做详细检测，根据结果判断是否需要修复处理；(2) Type 2: Use CCTV for detailed inspection, and judge whether repairing is required based on the results;（3）类型3：直接进行修复处理。(3) Type 3: Repair processing directly.2.根据权利要求1所述应用手持视频和闭路电视的排水管道检测及评估方法，其特征在于，利用手持视频进行支管暗接/错接的检测：如果雨水支管接入污水干管或者未名污水管接入干管，则判断为类型2；如果污水支管接入雨水干管，则判断为类型3。2. According to claim 1, the drainage pipeline detection and evaluation method using handheld video and closed-circuit television, is characterized in that, utilizes handheld video to carry out the detection of branch pipe dark connection/wrong connection: if the rainwater branch pipe is connected to the main sewage pipe or unnamed If the sewage pipe is connected to the main pipe, it is judged as type 2; if the sewage branch pipe is connected to the rainwater main pipe, it is judged as type 3.3.根据权利要求1所述应用手持视频和闭路电视的排水管道检测及评估方法，其特征在于，利用手持视频进行地下水内渗程度检测：如果排水管道有滴水现象，则判断为类型1；如果地下水形成水流进入排水管道，则判断为类型2；如果地下水形成水柱或喷涌进入排水管道，则判断为类型3。3. according to claim 1 said application of hand-held video and closed-circuit television drainage pipeline detection and evaluation method, it is characterized in that, utilize hand-held video to carry out groundwater infiltration degree detection: if drainage pipeline has dripping phenomenon, then be judged as type 1; If the groundwater forms a flow and enters the drainage pipe, it is judged as type 2; if the groundwater forms a water column or gushes into the drainage pipe, it is judged as type 3.