Predicting the Probability of Failure of Cementitious Sewer Pipes Using Stochastic Finite Element Method

Alani, Amir M.; Faramarzi, Asaad

doi:10.3390/ijerph120606641

Cited by 15 publications

(2 citation statements)

References 23 publications

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“…Furthermore, probabilistic models, for example based on stochastic finite element methods, have been developed to predict failure of sewer pipes exposed to corrosion and the Gaussian processes regression (GPR) model was found to be valuable for extension of a limited dataset to estimate the concrete corrosion rate in sewers (Alani & Faramarzi, 2015;Liu et al, 2017).…”

Section: Computational and Probabilistic Models For Sewer Deterioratimentioning

confidence: 99%

Sulfur transformations in sewer networks: effects, prediction and mitigation of impacts

Hvitved-Jacobsen¹

2020

Environmental Technologies to Treat Sulphur Pollution: Principles and Engineering

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Sulfur transformations in sewer networks are predominantly of importance because of the formation and occurrence of hydrogen sulfide. Hydrogen sulfide related to wastewater in sewers is a worldwide problem as it leads to concrete and metal corrosion, odor nuisance and human health impacts. The solution to these problems has its starting point in an understanding of the sewer network as a reactor for physical, chemical and biological sulfur processes that govern the formation of hydrogen sulfide and its control. In this respect, it becomes important to predict the interacting sulfur processes in terms of both simple empirical equations and more advanced models that are based on a conceptual understanding of the sulfur processes, the latter is of particular importance when applied to the complex constructed and functioning sewers of today. Problems related to sewer gases have been known for centuries. However, no more than about 100 years ago, based on sound scientific and technical knowledge, it was recognized that corrosion and odor problems in wastewater collection systems are closely related to anaerobic conditions and a corresponding formation of hydrogen sulfide. In brief, sulfide formation takes place by the activity of anaerobic sulfate-reducing bacteria that are mainly found in sewer biofilms from where sulfide penetrates the wastewater phase (see also Chapter 5). It is the subsequent emission of hydrogen sulfide into the sewer atmosphere that

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Section: Computational and Probabilistic Models For Sewer Deterioratimentioning

confidence: 99%

Sulfur transformations in sewer networks: effects, prediction and mitigation of impacts

Hvitved-Jacobsen¹

2020

Environmental Technologies to Treat Sulphur Pollution: Principles and Engineering

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“…e thickness-to-span ratio indicator has allowed for simple estimation of the stability of underground caves that is easy to implement in engineering practice. e drawback of this approach is that it makes no distinction regarding the rock strength and the load size, each of which has a great influence on the stability [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Constraint Embankment Construction to Prevent the Collapse of Underground Caves

Zhang

Chen

2019

Advances in Civil Engineering

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Dozens of underground karst caves were found before constructing the Changli highway. The thickness-to-span ratio of nearly half of the caves is less than 0.05, and the greatest ratio is only 0.35, far less than the value demanded by local construction specifications (0.8). The caves located at K50 + 700 and K178 + 800 are by far the only two caves that have become unstable. Only one passive measure was taken when constructing the highway, i.e., building 0.5 m thick continuous reinforced concrete slabs above the embankment; this measure did not contribute to the improvement of the stability of the underground caves. Numerical solutions based on strength reduction and analytical solutions based on the beam hypothesis are used to assess the stability of underground caves. The capacity of an underground cave to bear embankment construction is observed to be proportional to the tensile strength of the rock mass and the square of the thickness-to-span ratio of the cave roof. The tensile strength of the rock mass is ψ times lower than that of the intact rock. The value of ψ is mainly determined by the geological strength index (GSI). To prevent instability of underground caves, the embankment height should be reasonably controlled. However, local construction specifications requiring that the thickness-to-span ratio of underground cave be greater than 0.8 are conservative.

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Preventive Approach to Reduce Risk Caused by Failure of a Rainwater Drainage System: The Case Study of Corato (Southern Italy)

Apollonio

Ferrante

Piccinni

2017

Computational Science and Its Applications – ICCSA 2017

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Predicting the Probability of Failure of Cementitious Sewer Pipes Using Stochastic Finite Element Method

Cited by 15 publications

References 23 publications

Sulfur transformations in sewer networks: effects, prediction and mitigation of impacts

Sulfur transformations in sewer networks: effects, prediction and mitigation of impacts

Constraint Embankment Construction to Prevent the Collapse of Underground Caves

Preventive Approach to Reduce Risk Caused by Failure of a Rainwater Drainage System: The Case Study of Corato (Southern Italy)

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