A method for quality acceptance of urban drainage pipeline inspection results

Abstract

The present invention discloses a method for quality acceptance of urban drainage pipeline inspection results, including the steps of preparing a self-inspection report after the inspection unit completes the initial inspection of the digital management system of the pipe network, and after the inspection unit completes the initial inspection of the digital management system of the pipe network, and passes the initial inspection, and then applying for acceptance, and conducting internal and external inspections. The present invention can standardize the acceptance procedures of drainage pipeline detection, special culvert detection, drainage pipeline detection and evaluation, drainage outlet investigation, rainwater and sewage mixed connection investigation, plot investigation and other work of urban water environment comprehensive treatment projects, unify the acceptance requirements, ensure the quality of the results, provide accurate underground pipeline status data for the planning, design, construction and other aspects of water environment comprehensive treatment projects, ensure the implementation effect of water environment comprehensive treatment work, and solve the problem that the acceptance quality of urban underground pipeline inspection results of water environment comprehensive treatment projects in the prior art is inconsistent with the on-site construction quality due to the lack of acceptance basis.

Description

Technical Field

[0001] The invention belongs to the technical field of drainage network acceptance, and in particular relates to a method for quality acceptance of urban drainage pipeline inspection results. Background Art

[0002] The low centralized sewage collection rate is the primary problem faced by the comprehensive management of urban water environment based on pipe network management. The stable and efficient operation of urban drainage systems is the prerequisite for ensuring the effectiveness of comprehensive water environment management. In the comprehensive management of urban water environment, it is necessary to sort out the drainage system of the whole river basin and investigate the current status of the drainage network. To achieve "clear situation and clear bottom line" is the basic condition for formulating technical routes and taking effective measures. The quality of the drainage pipeline inspection results is related to the effectiveness of comprehensive water environment management.

[0003] In actual work, there are problems such as insufficient depth of work by the inspection units, unclear network topology, and disconnection between design and inspection, which lead to low quality and insufficient effectiveness of the inspection results, thus affecting the progress of the project and the effectiveness of governance. In order to improve the accuracy, reliability and effectiveness of the drainage network inspection data, relevant requirements need to be put forward for the quality and acceptance of the drainage network inspection results.

[0004] At present, there is no corresponding urban drainage pipeline inspection results quality and acceptance specification to guide the acceptance work and ensure the quality of the inspection results. Therefore, in order to solve the problem of no acceptance basis for the urban underground pipeline inspection results of the comprehensive water environment management project and ensure the quality of the inspection results, a method for the quality and acceptance of urban drainage pipeline inspection results is proposed. Summary of the invention

[0005] The purpose of the present invention is to propose a method for quality acceptance of urban drainage pipeline inspection results in view of the deficiencies in the prior art. The method is used for quality inspection and acceptance of urban drainage pipeline inspection results of water environment comprehensive management projects. The method can standardize the acceptance procedures for drainage pipeline detection, special culvert detection, drainage pipe detection and evaluation, drainage outlet investigation, rainwater and sewage mixed connection investigation, plot investigation and other work of urban water environment comprehensive management projects, unify acceptance requirements, ensure the quality of results, provide accurate underground pipeline status information for planning, design, construction and other aspects of water environment comprehensive management projects, ensure the effectiveness of the implementation of water environment comprehensive management work, and solve the problem in the prior art that the acceptance quality of urban underground pipeline inspection results of water environment comprehensive management projects is inconsistent with the on-site construction quality due to the lack of acceptance basis.

[0006] The technical purpose of the present invention is achieved through the following technical solutions: A method for quality acceptance of urban drainage pipeline inspection results, comprising the following steps:

[0007] S1 completes the initial inspection of the pipeline network digital management system for the inspection unit, including: spatial position inspection, topology inspection, attribute inspection, connectivity inspection, longitudinal section inspection and collision inspection, to ensure that the pipeline attribute information is consistent with the original data and records;

[0008] S2 After the inspection unit completes the initial inspection of the digital management system of the pipe network and passes it, it shall prepare a self-inspection report;

[0009] S3 After the investigation unit provides the quality inspection and acceptance materials of the results, it shall apply for acceptance. The quality inspection and acceptance materials include: drainage pipeline detection results report, drainage relationship detection results map, and drainage pipeline detection results table;

[0010] S4 conducts internal and external inspections: requirements are put forward for the quality of inspection results and acceptance standards from seven aspects: drainage pipelines, integrated pipelines, special culverts, drainage pipe inspection and evaluation, drainage outlet investigation, rainwater and sewage mixed connection investigation, and plot investigation, including:

[0011] Drain line detection:

[0012] Take one or several independent drainage zones within the scope of the inspection project as the inspection unit, and the sampling ratio shall not be less than 5%, which is calculated by the ratio of the number of obvious pipeline points sampled to the total number of obvious pipeline points in the inspection unit;

[0013] Focus on spot checks at intersections, connections between pipelines and culverts, turning points, three-way pipeline points, and downstream ends of drainage pipelines;

[0014] The quality of drainage pipeline detection results is evaluated from nine aspects: connection relationship, cross-sectional dimensions, buried depth error, pipeline properties, missing accessories, downstream connectivity of pipelines, pipeline point measurement error, flow direction, and pipeline material.

[0015] Connection relationship: Use tracer method and endoscopic inspection to verify the connection relationship of the drainage pipeline. The error rate should not be greater than 5%. The error rate is calculated based on the ratio of the sum of the length of the wrong pipe section and all upstream pipe sections to the total length of the pipe section in the inspection unit.

[0016] Cross-sectional dimensions: Check the cross-sectional dimensions of the drainage pipelines. The error rate should not be greater than 5%. The error rate is calculated based on the ratio of the number of pipeline points with obvious errors to the total number of pipeline points sampled in the inspection unit.

[0017] Depth error: Repeated measurement method is used to check the depth error. According to the inspection results, the depth measurement error of obvious pipeline points is calculated according to the following formula.

[0018]

[0019] Where: Δd tiis the buried depth deviation of obvious pipeline points (mm); n1 is the number of inspection points of obvious pipeline points;

[0020] The mean error of the pipe bottom burial depth should not be greater than 25mm, and twice the mean error is taken as the limit error;

[0021] Pipeline nature: Check the pipeline design and completion related data, and confirm the pipeline nature through on-site inspection. The error rate should not be greater than 5%. The error rate is calculated based on the ratio of the number of pipeline points with obvious errors to the total number of pipeline points sampled and inspected in the inspection unit.

[0022] Missing attachments: Conduct on-site inspections of roads or plots within the inspection unit and open wells for confirmation. The missing rate should not be greater than 2.5%. The missing rate is calculated based on the ratio of the number of missed obvious pipeline points to the total number of sampled obvious pipeline points within the inspection unit.

[0023] Downstream connectivity of pipelines: Use tracer method, QV, CCTV detection and other methods to verify the downstream direction of the pipeline. The error rate should not be greater than 5%. The error rate is calculated based on the ratio of the number of pipeline points with obvious errors to the total number of pipeline points sampled in the inspection unit.

[0024] Pipeline point measurement error: Repeated measurement method is used to check the pipeline point measurement error. According to the inspection results, the error in the plane position measurement of the pipeline point is calculated as follows:

[0025] Where Δs i The plane position of the pipeline point is poor when it is repeatedly measured, and n is the number of points or edges of the pipeline that are repeatedly measured;

[0026] Calculate the mean error of the elevation measurement of the pipeline point according to the following formula:

[0027] Where Δh ci is the number of points or edges of the pipeline that are repeatedly measured, and n is the number of points or edges of the pipeline that are repeatedly measured;

[0028] The mean error of the plane position measurement in the geometric accuracy of pipeline point measurement should not be greater than 50mm, and the mean error of the elevation measurement should not be greater than 30mm. The double mean error is taken as the limit error.

[0029] Flow direction: On-site review, the error rate should not be greater than 5%, and the error rate is calculated based on the ratio of pipeline points with obvious errors to the total number of pipelines sampled and inspected within the inspection unit;

[0030] Pipeline material: On-site review, the error rate should not be greater than 10%, and the error rate is calculated based on the ratio of pipeline points with obvious errors to the total number of pipelines with obvious errors sampled in the inspection unit;

[0031] S5 A field inspection record sheet is generated during the field inspection, including: field inspection record of buried depth of obvious pipeline points, field inspection record of pipeline point measurement, and quality inspection record;

[0032] S6 Conduct quality inspection and acceptance evaluation on the investigation results based on the on-site inspection results;

[0033] S7 determines the conformity of each inspection item. If all inspection items are qualified, the single result will pass the acceptance. If the single result fails the acceptance, the inspection unit shall make rectifications and reapply for acceptance after the rectification passes the self-inspection;

[0034] After S8 acceptance, an inspection report shall be prepared. The contents of the inspection report shall include: basic information of the project, overview of the inspected results, sampling conditions, inspection content and methods, major existing problems and treatment suggestions.

[0035] Preferably, in step S1, the pipeline data is checked by combining program automatic inspection with human-computer interaction inspection. The suspicious areas are first searched out through program inspection to narrow the scope or accurately locate the areas. Then, the human-computer interaction inspection method is used to manually judge the correctness of the data, and key inspections are performed on important pipelines, complex pipelines, and pipeline elements and areas that are prone to misrouting or wrong rotation.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. The present invention provides a method for quality acceptance of urban drainage pipeline inspection results. It carries out inspection result acceptance by combining internal and external work, ensures the consistency of on-site acceptance and record acceptance through acceptance rules, and can accurately solve the problem of inconsistency between inspection results and on-site.

[0038] 2. The present invention provides a method for quality acceptance of urban drainage pipeline inspection results. By covering the entire process, a systematic urban drainage pipeline inspection standard is designed, so that the quality of urban drainage pipeline inspection results is effectively guaranteed, the scientificity and accuracy of the acceptance results are ensured, and the safety, sanitation and environmental protection of the urban drainage pipeline system are guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 The present invention is a flow chart of a method for quality acceptance of urban drainage pipeline inspection results. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Reference Figure 1 , Figure 1It is a flow chart of a method for quality acceptance of urban drainage pipeline inspection results of the present invention. As a preferred embodiment of the present invention, this embodiment provides a method for quality acceptance of urban drainage pipeline inspection results, including the following steps:

[0042] S1 completes the initial inspection of the pipeline network digital management system for the inspection unit, including: spatial position inspection, topology inspection, attribute inspection, connectivity inspection, longitudinal section inspection and collision inspection, to ensure that the pipeline attribute information is consistent with the original data and records;

[0043] S2 After the inspection unit completes the initial inspection of the digital management system of the pipe network and passes it, it shall prepare a self-inspection report;

[0044] S3 After the investigation unit provides the quality inspection and acceptance materials of the results, it shall apply for acceptance. The quality inspection and acceptance materials include: drainage pipeline detection results report, drainage relationship detection results map, and drainage pipeline detection results table;

[0045] S4 conducts internal and external inspections: requirements are put forward for the quality of inspection results and acceptance standards from seven aspects: drainage pipelines, integrated pipelines, special culverts, drainage pipe inspection and evaluation, drainage outlet investigation, rainwater and sewage mixed connection investigation, and plot investigation, including:

[0046] Drain line detection:

[0047] Take one or several independent drainage zones within the scope of the inspection project as the inspection unit, and the sampling ratio shall not be less than 5%, which is calculated by the ratio of the number of obvious pipeline points sampled to the total number of obvious pipeline points in the inspection unit;

[0048] Focus on spot checks at intersections, connections between pipelines and culverts, turning points, three-way pipeline points, and downstream ends of drainage pipelines;

[0049] The quality of drainage pipeline detection results is evaluated from nine aspects: connection relationship, cross-sectional dimensions, buried depth error, pipeline properties, missing accessories, downstream connectivity of pipelines, pipeline point measurement error, flow direction, and pipeline material.

[0050] Connection relationship: Use tracer method and endoscopic inspection to verify the connection relationship of the drainage pipeline. The error rate should not be greater than 5%. The error rate is calculated based on the ratio of the sum of the length of the wrong pipe section and all upstream pipe sections to the total length of the pipe section in the inspection unit.

[0051] Cross-sectional dimensions: Check the cross-sectional dimensions of the drainage pipelines. The error rate should not be greater than 5%. The error rate is calculated based on the ratio of the number of pipeline points with obvious errors to the total number of pipeline points sampled in the inspection unit.

[0052] Depth error: Repeated measurement method is used to check the depth error. According to the inspection results, the depth measurement error of obvious pipeline points is calculated according to the following formula.

[0053]

[0054] Where: Δd ti is the buried depth deviation of obvious pipeline points (mm); n1 is the number of inspection points of obvious pipeline points;

[0055] The mean error of the pipe bottom burial depth should not be greater than 25mm, and twice the mean error is taken as the limit error;

[0056] Pipeline nature: Check the pipeline design and completion related data, and confirm the pipeline nature through on-site inspection. The error rate should not be greater than 5%. The error rate is calculated based on the ratio of the number of pipeline points with obvious errors to the total number of pipeline points sampled and inspected in the inspection unit.

[0057] Missing attachments: Conduct on-site inspections of roads or plots within the inspection unit and open wells for confirmation. The missing rate should not be greater than 2.5%. The missing rate is calculated based on the ratio of the number of missed obvious pipeline points to the total number of sampled obvious pipeline points within the inspection unit.

[0058] Downstream connectivity of pipelines: Use tracer method, QV, CCTV detection and other methods to verify the downstream direction of the pipeline. The error rate should not be greater than 5%. The error rate is calculated based on the ratio of the number of pipeline points with obvious errors to the total number of pipeline points sampled in the inspection unit.

[0059] Pipeline point measurement error: Repeated measurement method is used to check the pipeline point measurement error. According to the inspection results, the error in the plane position measurement of the pipeline point is calculated as follows:

[0060] Where Δs i The plane position of the pipeline point is poor when it is repeatedly measured, and n is the number of points or edges of the pipeline that are repeatedly measured;

[0061] Calculate the mean error of the elevation measurement of the pipeline point according to the following formula:

[0062] Where Δh ci is the number of points or edges of the pipeline that are repeatedly measured, and n is the number of points or edges of the pipeline that are repeatedly measured;

[0063] The mean error of the plane position measurement in the geometric accuracy of pipeline point measurement should not be greater than 50mm, and the mean error of the elevation measurement should not be greater than 30mm. The double mean error is taken as the limit error.

[0064] Flow direction: On-site review, the error rate should not be greater than 5%, and the error rate is calculated based on the ratio of pipeline points with obvious errors to the total number of pipelines sampled and inspected within the inspection unit;

[0065] Pipeline material: On-site review, the error rate should not be greater than 10%, and the error rate is calculated based on the ratio of pipeline points with obvious errors to the total number of pipelines with obvious errors sampled in the inspection unit;

[0066] S5 A field inspection record sheet is generated during the field inspection, including: field inspection record of buried depth of obvious pipeline points, field inspection record of pipeline point measurement, and quality inspection record;

[0067] Among them, in the on-site inspection record of the buried depth of obvious pipeline points, the inspection depth is the buried depth of obvious pipeline points within the sampling inspection range obtained by repeated on-site measurements; the exploration depth is the buried depth of the corresponding point number in the investigation results, and is inspected and recorded according to the following table:

[0068] On-site inspection record form for obvious pipeline point burial depth

[0069]

[0070] In the on-site inspection record of pipeline point on-site measurement, the inspection coordinates are the coordinates of obvious pipeline points within the sampling inspection range obtained by repeated on-site measurements; the investigation coordinates are the coordinates of the corresponding pipeline points in the investigation results, and are recorded according to the following table:

[0071] Pipeline point measurement on-site inspection record form

[0072]

[0073] Quality inspection records mainly record quality problems such as connection relationship errors, cross-section size errors, pipeline nature errors, missing accessories, pipeline downstream connectivity errors, flow direction errors, pipeline material errors, etc., and record them according to the following table:

[0074] Quality inspection record sheet

[0075]

[0076] S6 Conduct quality inspection and acceptance evaluation on the investigation results based on the on-site inspection results, and evaluate and record them according to the following table;

[0077] Drainage pipeline detection quality inspection and acceptance evaluation form

[0078]

[0079] S7 determines the conformity of each inspection item. If all inspection items are qualified, the single result will pass the acceptance. If the single result fails the acceptance, the inspection unit shall make rectifications and reapply for acceptance after the rectification passes the self-inspection;

[0080] After S8 acceptance, an inspection report shall be prepared. The contents of the inspection report shall include: basic information of the project, overview of the inspected results, sampling conditions, inspection content and methods, major existing problems and treatment suggestions.

[0081] Among them, the basic information of the project includes: inspection time, inspection location, inspection method, inspection personnel, inspection hardware and software equipment, etc.

[0082] Overview of the inspected results: briefly describe the basic situation of the results production, including the source, survey area location, production unit, qualification level, production date, production method, results form, batch size, etc.

[0083] Sampling situation: including sampling basis, sampling method, sample size, etc. If it is counting sampling, the sampling plan should be listed.

[0084] Inspection content and methods: Explain the various inspection parameters and inspection methods of the results.

[0085] Main existing problems and suggestions for dealing with them: According to the inspection parameters, describe the main quality problems existing in the sample results and give examples (map number, point number, etc.) to illustrate.

[0086] After the inspection report is completed, it will serve as the basis for settling the costs of the inspection results.

[0087] In some preferred embodiments, in step S1, the pipeline data is checked by combining program automatic inspection with human-computer interaction inspection. First, suspicious areas are searched out through program inspection to narrow the scope or accurately locate, and then the human-computer interaction inspection method is used to manually judge the correctness of the data, and key inspections are performed on important pipelines, complex pipelines, and pipeline elements and areas that are prone to misdirection or wrong turn.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A method for quality acceptance of urban drainage pipeline inspection results, characterized by: The following steps are involved: S1 completes the initial inspection of the pipeline network digital management system for the inspection unit, including: spatial position inspection, topology inspection, attribute inspection, connectivity inspection, longitudinal section inspection and collision inspection, to ensure that the pipeline attribute information is consistent with the original data and records; S2 After the inspection unit completes the initial inspection of the digital management system of the pipe network and passes it, it shall prepare a self-inspection report; S3 After the investigation unit provides the quality inspection and acceptance materials of the results, it shall apply for acceptance. The quality inspection and acceptance materials include: drainage pipeline detection results report, drainage relationship detection results map, and drainage pipeline detection results table; S4 conducts internal and external inspections: requirements are put forward for the quality of inspection results and acceptance standards from seven aspects: drainage pipelines, integrated pipelines, special culverts, drainage pipe inspection and evaluation, drainage outlet investigation, rainwater and sewage mixed connection investigation, and plot investigation, including: Drain line detection: One or more independent drainage zones within the scope of the inspection project shall be taken as the inspection unit, and the sampling ratio shall not be less than 5%, which shall be calculated based on the ratio of the number of obvious pipeline points sampled to the total number of obvious pipeline points in the inspection unit; Focus on spot checks at intersections, connections between pipelines and culverts, turning points, three-way pipeline points, and downstream ends of drainage pipelines; The quality of drainage pipeline detection results is evaluated from nine aspects: connection relationship, cross-sectional dimensions, buried depth error, pipeline properties, missing accessories, downstream connectivity of pipelines, pipeline point measurement error, flow direction, and pipeline material. Connection relationship: Use tracer method and endoscopic inspection to verify the connection relationship of the drainage pipeline. The error rate should not be greater than 5%. The error rate is calculated based on the ratio of the sum of the length of the wrong pipe section and all upstream pipe sections to the total length of the pipe section in the inspection unit. Cross-sectional dimensions: Check the cross-sectional dimensions of the drainage pipelines. The error rate should not be greater than 5%. The error rate is calculated based on the ratio of the number of pipeline points with obvious errors to the total number of pipeline points sampled in the inspection unit. Depth error: Repeated measurement method is used to check the depth error. According to the inspection results, the depth measurement error of obvious pipeline points is calculated according to the following formula. ； Where: is the buried depth deviation of obvious pipeline points (mm); Check the number of points for obvious pipeline points; The mean error of the pipe bottom burial depth should not be greater than 25mm, and twice the mean error is taken as the limit error; Pipeline nature: Check the pipeline design and completion related data, and confirm the pipeline nature through on-site inspection. The error rate should not be greater than 5%. The error rate is calculated based on the ratio of the number of pipeline points with obvious errors to the total number of pipeline points sampled and inspected in the inspection unit. Missing attachments: Conduct on-site inspections of roads or plots within the inspection unit and open wells for confirmation. The missing rate should not be greater than 2.5%. The missing rate is calculated based on the ratio of the number of missed obvious pipeline points to the total number of obvious pipeline points sampled within the inspection unit. Downstream connectivity of pipelines: Use tracer method, QV, and CCTV detection methods to verify the downstream destination of the pipeline. The error rate should not be greater than 5%. The error rate is calculated based on the ratio of the number of pipeline points with obvious errors to the total number of pipeline points sampled in the inspection unit. Pipeline point measurement error: Repeated measurement method is used to check the pipeline point measurement error. According to the inspection results, the error in the plane position measurement of the pipeline point is calculated as follows: , where To repeatedly measure the plane position difference of pipeline points, To repeat the measurement of pipeline points or edges; Calculate the mean error of the elevation measurement of the pipeline point according to the following formula: , where To repeatedly measure the number of pipeline points or edges, To repeat the measurement of pipeline points or edges; The mean error of the plane position measurement in the geometric accuracy of pipeline point measurement should not be greater than 50mm, and the mean error of the elevation measurement should not be greater than 30mm. The double mean error is taken as the limit error. Flow direction: On-site review, the error rate should not be greater than 5%, and the error rate is calculated based on the ratio of pipeline points with obvious errors to the total number of pipelines sampled and inspected within the inspection unit; Pipeline material: On-site review, the error rate should not be greater than 10%, and the error rate is calculated based on the ratio of pipeline points with obvious errors to the total number of pipelines with obvious errors sampled in the inspection unit; S5 A field inspection record sheet is generated during the field inspection, including: field inspection record of buried depth of obvious pipeline points, field inspection record of pipeline point measurement, and quality inspection record; S6 Conduct quality inspection and acceptance evaluation on the investigation results based on the on-site inspection results; S7 determines the conformity of each inspection item. If all inspection items are qualified, the single result will pass the acceptance. If the single result fails the acceptance, the inspection unit shall make rectifications and reapply for acceptance after the rectification passes the self-inspection; After S8 acceptance, an inspection report shall be prepared. The contents of the inspection report shall include: project status, overview of the inspected results, sampling conditions, inspection content and methods, existing problems and treatment suggestions.

2. A method for quality acceptance of urban drainage pipeline inspection results according to claim 1, characterized in that: In step S1, the pipeline data is checked by combining program automatic inspection with human-computer interaction inspection. The suspicious areas are first searched out through program inspection to narrow the scope or accurately locate the areas. Then the human-computer interaction inspection method is used to manually judge the correctness of the data, and key inspections are carried out on important pipelines, complex pipelines, and pipeline elements and areas that are prone to misdirection or wrong rotation.

Images