A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Probabilistic Lifecycle Cost Analysis of Levees against Backward Erosion
Lifecycle analysis of levees against storm surge hazards is critical for the development of cost-effective risk mitigation solutions. This paper introduces a probabilistic framework for lifecycle analysis of levees by considering the impacts of storm surge hazard on the backward erosion of levees. Soil backward erosion can be described by the following damage states: first, the seepage front reaches the landside due to the difference in the hydraulic head. Second, the blanket soil layer in the landside ruptures due to uplift pressures. At this stage, water starts to flow out. Third, a water path is created and develops a piping channel between waterside and landside of the levee. Finally, the configuration of the levee starts changing, leading to the collapse of the levee, and breach. Existing lifecycle analysis frameworks neglect impacts of residual damage because of untreated damages from prior storm surges or incomplete repairs. This may lead to underestimation of probabilities of transitioning to more severe states of internal erosion under future hazards. This study addresses this gap via a comprehensive lifecycle analysis framework that incorporates the effects of multiple occurrences of storm surge hazards and incomplete repair actions. This methodology is subsequently utilized to evaluate the impact of repair time durations of a single levee that is susceptible to backward erosion. Results point to the significance of the dependencies among backward erosion damage states as well as the repair times for the lifecycle cost of levees against backward erosion.
Probabilistic Lifecycle Cost Analysis of Levees against Backward Erosion
Lifecycle analysis of levees against storm surge hazards is critical for the development of cost-effective risk mitigation solutions. This paper introduces a probabilistic framework for lifecycle analysis of levees by considering the impacts of storm surge hazard on the backward erosion of levees. Soil backward erosion can be described by the following damage states: first, the seepage front reaches the landside due to the difference in the hydraulic head. Second, the blanket soil layer in the landside ruptures due to uplift pressures. At this stage, water starts to flow out. Third, a water path is created and develops a piping channel between waterside and landside of the levee. Finally, the configuration of the levee starts changing, leading to the collapse of the levee, and breach. Existing lifecycle analysis frameworks neglect impacts of residual damage because of untreated damages from prior storm surges or incomplete repairs. This may lead to underestimation of probabilities of transitioning to more severe states of internal erosion under future hazards. This study addresses this gap via a comprehensive lifecycle analysis framework that incorporates the effects of multiple occurrences of storm surge hazards and incomplete repair actions. This methodology is subsequently utilized to evaluate the impact of repair time durations of a single levee that is susceptible to backward erosion. Results point to the significance of the dependencies among backward erosion damage states as well as the repair times for the lifecycle cost of levees against backward erosion.
Probabilistic Lifecycle Cost Analysis of Levees against Backward Erosion
Rahimi, Mehrzad (author) / Dehghani, Nariman L. (author) / Shafieezadeh, Abdollah (author)
International Conference on Sustainable Infrastructure 2019 ; 2019 ; Los Angeles, California
2019-11-04
Conference paper
Electronic Resource
English
Prediction of the Hydraulic Gradient for Backward Erosion Piping in River Levees
| Springer Verlag | 2024
Kinetic Energy Method for Predicting Initiation of Backward Erosion in Earthen Dams and Levees
| Online Contents | 2014
Probabilistic Design of Flood Levees
| NTIS | 1983