Multiattribute Utility Theory Deployment in Sewer Defects Assessment

Kaddoura, Khalid; Zayed, Tarek; Hawari, Alaa H.

doi:10.1061/(asce)cp.1943-5487.0000723

Cited by 25 publications

(4 citation statements)

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“…The robot crawler can travel along from manhole to manhole [20]. Generally, the screening header running total (distance of camera from MH start) [21][22][23]. Typically, during CCTV inspection, the camera moves forward down the axis of the sewer pipe at a speed of 2.0-5.0 m min -1 .…”

Section: Located In the Bangkok Metropolitan Area Dindaeng Water Environmentmentioning

confidence: 99%

“…studied deformation and surface damage to assess sewer pipe defects. Utilized in the decision-making process was the Multiattribute Utility Theory, which was based on various protocols and guidelines, including the New Zealand Pipe Inspection Manual[22].Regarding the structural condition of this research, the majority of the findings were SD defects, while the second most common defect type was JF. The next most common defects were CL, IP, CC, and CM.…”

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confidence: 98%

“…Shin et al (2016) reported on the comparison of the existing protocol, MOE (adapted from the New Zealand Pipe Inspection Manual and WRCs), and the extended protocol called SCARD. The result found crack longitudinal (19%), crack circumferential (6.3%),crack multiple (0.4%), infiltration (2.1%), joint faulty (19.2%), and surface damage (7.4%)[39].Daher et al (2018) observed that high weights of structural defects, such as crack multiple, collapsed sewer pipes, corroded reinforced concrete pipes, and defective joints[40] Kaddoura et al (2018). studied deformation and surface damage to assess sewer pipe defects.…”

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confidence: 99%

“…Kaddoura et al (2018) focused on the operational defects of settled deposit and infiltration by using the Multiattribute Utility Theory in decision-making, planning of budgets, and rehabilitation of sewer defects assessment. Infiltration is included under operational defects[22].Overall, Ratchasima Road and Nakhon Pathom Road for structural condition and Soi Pracha Songkhro Road and Soi Phophan Dindaeng Road for service condition were observed to have the most sewer pipeline defects in Dindaeng District, Thailand.Moreover, Samsen Road, Vibhavadi Rangsit Road, and Krung Kasem Road also indicated large SD severity levels. This may be due to the impact of both physical factors, such as pipe diameter, depth, and slope, and the land-use of the surrounding area, including the community types and the traffic.…”

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Inspection and Understanding of Sewer Network Condition in Dindaeng District, Bangkok, Thailand

Phyu

Khaodhiar

2021

App. Envi. Res.

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Sewer pipelines are usually operated with little maintenance after installation. After years in service, sewer pipes get old and deteriorated. The present research is the first study that attempts to inspect the condition of sewer pipelines in the Bangkok Metropolitan Area. A robot with Closed Circuit Television (CCTV) was used to capture video and images of the interior of the sewer pipelines between two manholes. The system was operated by Utility Business Alliance (UBA) Company. The condition of the sewer pipelines was visually analyzed in line with the scoring and grading system of New Zealand’s pipe inspection manual. CCTV footage was received from UBA, and each meter of the sewer pipelines was visually inspected, scored, and graded. The study area included 22 randomly selected roads around Dindaeng District. For the structural condition, surface damage was found in all of the 89 inspected pipes. Joint faulty and crack longitudinal were found in approximately 60% of the inspected sewer pipelines. Infiltration present was found in 33% of the inspected pipes, while crack circumferential and crack multiple were minimal in the study area. For the service condition, obstruction temporary, debris silty, and debris greasy were found in 15%, 11%, and 4% of the inspected sewer pipelines, respectively. The grades of the structural condition were mainly between 4 and 5, indicating that most of the sewer pipelines in the area would need rehabilitation programs. The grades of the service condition were between excellent and good. This is the first time that such a program has been conducted in Thailand. The information of the condition of the pipelines and the inspection and characterization methods should be used as a reference for maintenance programs and future assessment programs. The adjustment or development of the inspection manual should be done in collaboration with local contacts.

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Section: Located In the Bangkok Metropolitan Area Dindaeng Water Environmentmentioning

confidence: 99%

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confidence: 98%

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confidence: 99%

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confidence: 99%

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