Sustainable Approach for Optimal Steel Sheet Pile Structure Assessment, Maintenance, and Rehabilitation.

摘要

The U.S. Army Corps of Engineers (USACE) has constructed a wide variety of civil works structures. Due to age and other factors, many of these structures have deteriorated to a point that they need varying levels of maintenance and repair (M&R). Steel sheet pile (SSP) structures are part of the USACE civilian projects such as lock and dam and other navigation facilities. Failure of a SSP wall or cell can significantly affect the operations of a lock and dam or general river navigation. An improved SSP inspection procedure is proposed, to couple previously developed field inspection condition index (CI) methodology with reliability assessments and to quantify the life-cycle costs and environmental impacts associated with various M&R scenarios. M&R strategies over the analysis period are determined through reliability assessment for structures with relatively low CI (structures in CI Zone 2 and Zone 3). The level of failure would then be determined by the life cycle cost analysis (LCCA) and environmental life cycle assessment (LCA) of M&R alternatives. Using these methodologies, specific USACE districts will gain improved capabilities to monitor the current conditions of SSP infrastructure and to identify the prioritized structures requiring sustainable M&R.