Condition assessment of the buried utility service infrastructure

Tu, Hao; Rogers, C. D. F.; Metje, Nicole; Chapman, David; Muggleton, J.M.; Foo, K.Y.; Wang, P; Pennock, S.R.; Atkins, P.R.; Swingler, S.G.; Parker, John C.; Costello, Seósamh B.; Burrow, Michael; Anspach, JH; Armitage, R; Cohn, AG; Goddard, K.F.; Lewin, P.L.; Orlando, Giovanni; Redfern, M.A.; Royal, Alexander; Saul, Adrian J.

doi:10.1016/j.tust.2011.10.011

Cited by 156 publications

(124 citation statements)

References 53 publications

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“…These variables are age, diameter and depth (Davies et al, 2001;Saegrov, 2006;Niño et al, 2012). Nevertheless, multivariate analyses are stronger because they allow detecting a global relationship and influence of several factors (Hao et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

Physical characteristics of pipes as indicators of structural state for decision-making considerations in sewer asset management

2016

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Sewer deterioration is a problem that affects many cities of the world. This affects the structural state of the sewer systems, as well as its hydraulic capacity and the service level. As a consequence, the sewer system stakeholders are working on the development of a proactive sewer management to make decision in time and avoid public emergencies. Therefore, the objective of this work was to predict the variable state using a clustering algorithm (k-means) in Bogotá's sewer pipes based on its physical characteristics. Among the most representative results was to find a relationship between pipes' characteristics and their structural state (chi-squared). Furthermore, the slope and ground level variables were the most related ones to the state of the pipes. The detected relationships are linear and can be used to make management decisions when pipes are clustered and the clusters are mapped on a principal component plane.Keywords: k-means, sewer asset management, cluster analysis, principal components analysis (PCA), proactive sewer management, sewer pipes, structural pipes state, Bogota's sewer system. RESUMENEl deterioro de los sistemas de alcantarillado es un problema que afecta a las ciudades, no solo en su estado estructural sino también en su capacidad hidráulica y nivel de servicio. En consecuencia, los encargados del sistema de alcantarillado están trabajando en el desarrollo de una gestión proactiva para tomar decisiones a tiempo y evitar emergencias públicas. Es por esto que el objetivo de este trabajo fue predecir la condición de las tuberías en la ciudad de Bogotá utilizando algoritmos tipo cluster (k -means), para discriminar las tuberías que tienen buena condición estructural de las que no. Entre los resultados más sobresalientes se encontró una relación entre las características estructurales de las tuberías y su estado (prueba Chi -cuadrado) siendo la pendiente y la profundidad las variables más relacionadas con el estado de las tuberías. Adicionalmente, estas relaciones encontradas resultaron lineales al agrupar las tuberías en un plano de componentes principales.Palabras clave: k-means, gestión de sistemas de alcantarillado, cluster, análisis de componentes principales (ACP), gestión proactiva de alcantarillados, tuberías de alcantarillado, condición estructural de tuberías de alcantarillado, sistema de alcantarillado de Bogotá.

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Section: Resultsmentioning

confidence: 99%

Physical characteristics of pipes as indicators of structural state for decision-making considerations in sewer asset management

2016

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“…Overview of NDE techniques Every NDE technique has strengths and weaknesses: there are several excellent reviews on such techniques and their specific capabilities (Costello et al, 2007;Dingus et al, 2002;Dorn et al, 1996;Hao et al, 2012;Jackson et al, 1992;Liu and Kleiner, 2013;Prinsloo et al, 2011;Thomson et al, 2009); key features of these reviews are summarised in Table 1. All of these papers review the literature regarding NDE and explain the operation of each technique.…”

Section: Assessing Condition In the Fieldmentioning

confidence: 99%

“…The Engineering and Physical Sciences Research Council (EPSRC)-funded UK research programmes Mapping the Underworld and, more recently, Assessing the Underworld, have been working to determine what underground assets can be successfully inspected without being exposed. While progress on identifying the location of a buried asset has been made, no methods of NDE have shown the ability to detect the defects discussed here either above ground or by using point assets, such as valves or hydrants, as access points (Hao et al, 2012).…”

Section: What Is the Required Resolution Of The Nde Technique(s)?mentioning

confidence: 99%

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What does NDE need to achieve for cast iron pipe networks?

Rainer

Capell

Clay-Michael³

et al. 2017

Infrastructure Asset Management

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Grey cast iron water pipe networks have been installed around the world, often 100-180 years ago. Cohorts (which can be defined by age, size, casting technology and geographical location, to specify but a few groups) degrade at different rates due to environmental and in-service issues, which can lead to a significant loss in mechanical performance. Hence, the management of these assets can be extremely problematic in terms of identifying priorities. The current paper considers the causes of such degradation, the consequences for defining accurate and up-to-date condition assessment protocols and hence the type and urgency of rehabilitation strategies. It follows that understanding the integrity/life expectancy of water networks requires non-destructive evaluation (NDE) of largediameter cast iron trunk mains, with particular reference to the kinds of defects that are likely to be present and the issues that make assessment difficult. From this, recommendations are outlined for asset managers required to specify NDE protocols, based on an understanding of the nature of the material and conditions in the field.

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“…For a comprehensive review of the current state of-the-art technologies for condition assessment of underground water and sewage pipelines, the reader is referred to Costello et al [23] and Hao et al [24].…”

Section: Field Surveymentioning

confidence: 99%

Failure Analysis of a Water Supply Pumping Pipeline System

Pozos‐Estrada

Sánchez-Huerta

Breña-Naranjo

et al. 2016

Water

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This paper describes the most important results of a theoretical, experimental and in situ investigation developed in connection with a water supply pumping pipeline failure. This incident occurred after power failure of the pumping system that caused the burst of a prestressed concrete cylinder pipe (PCCP). Subsequently, numerous hydraulic transient simulations for different scenarios and various air pockets combinations were carried out in order to fully validate the diagnostic. As a result, it was determined that small air pocket volumes located along the pipeline profile were recognized as the direct cause of the PCCP rupture. Further, a detail survey of the pipeline was performed using a combination of non-destructive technologies in order to determine if immediate intervention was required to replace PCC pipes. In addition, a hydraulic model was employed to analyze the behavior of air pockets located at high points of the pipeline.

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Condition assessment of the buried utility service infrastructure

Cited by 156 publications

References 53 publications

Physical characteristics of pipes as indicators of structural state for decision-making considerations in sewer asset management

Physical characteristics of pipes as indicators of structural state for decision-making considerations in sewer asset management

What does NDE need to achieve for cast iron pipe networks?

Failure Analysis of a Water Supply Pumping Pipeline System

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