Framework for Defining Asset Features to Monitor and Assess Earth-Retaining Structures

Abstract

Permanent earth-retaining structures (ERSs), including retaining walls, have been systematically managed, inventoried, and assessed by several government organizations, including the City of Cincinnati, Ohio; the Oregon and Pennsylvania Departments of Transportation; and the Central Federal Lands Highway Division of FHWA (for the National Park Service). For a comprehensive ERS asset management program, a careful evaluation of the structural health, criticality, and risk of ERSs is essential for proper management (preservation, rehabilitation, or replacement) of these aging assets. However, many transportation agencies struggle with the evaluation and incorporation of risk in their ERS management programs. This study addressed the development of a framework that would evaluate risk and would define its relationship to ERS condition (likelihood of failure) and ERS criticality (consequence of failure). A methodology for relating risk to routine inspection cycles for ERSs and remedial actions for those in distress is proposed.

Modelo Estratégico Do Sistema De Gestão De Pórticos De Sinalização Da Infraestruturas De Portugal, S.A.

“…A ocorrência de um evento extremo de colapso de uma estrutura terá consequências ao nível da via e da própria rede em que se insere, e consequentemente, um impacto no desempenho e objetivos da organização. O impacto de determinado ativo no desempenho e objetivos de uma organização determina a sua criticidade, ou seja, a sua importância estratégica, conforme referido por Rasdorf (2016). A segmentação da rede rodoviária da IP, de acordo com a proposta aprovada pela Instituto da Mobilidade e dos Transportes, diferencia níveis de prioridade, aos quais poderão estar associados diferentes objetivos operacionais.…”

Indicators for the Management of Earth‐Retaining Structures

“…The criticality index aims to express the strategic importance of the ERS for the network, which translates the consequence resulting from possible damage or inoperability of the structure [7]. The scale used ranges from Very Low to Very High, reflecting a consequence for the network.…”

“…The Risk Level of an Earth-Retaining Structure (ERS) is the combination of its Condition Index and Criticality Index, which provides an estimation of the level of risk that the ERS represents to the network. The Risk Level is a measure of the probability and consequence of failure or inoperability of an ERS, as proposed in [7]. The Probability of failure is represented by the Condition Index, which assesses the current state of the ERS.…”

“…Since defects or observations have different degrees of relevance to the component, following an approach proposed in [7] and [8], some of these are considered critical, which, when classified as severe (CR 5), will be representative of the Condition Rating of the component itself.…”