Accession Number : AD1012945


Title :   Analysis of a Floodplain I-Wall Embedded in Horizontally Stratified Soil Layers During Flood Events Using Corps I-Wall Software Version 1.0


Descriptive Note : Technical Report


Corporate Author : U.S. Army Engineer Research and Development Center Vicksburg United States


Personal Author(s) : Ebeling,Robert M ; Fong,Moira T ; White,Barry C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1012945.pdf


Report Date : 01 Jul 2016


Pagination or Media Count : 326


Abstract : The purpose of the I-Wall Analysis R and D effort is to provide the U.S. Army Corps of Engineers (USACE) districts with essential tools in analyzing and evaluating I-Wall performance in riverine, fluvial, and coastal environments. This report summarizes an engineering methodology and its implementation in the software Corps I-Wall, Version 1.0. The program is referred to as CI-Wall. This initial version of Corps I-Wall is used for the design of new I-Walls or the analysis of existing I-Walls in floodplains (i.e., I-Walls embedded in level ground) during flood loading. Horizontally stratified soil layers are assumed for Version 1.0. Other CI-Wall software engineering analysis capabilities include: total stress and/or effective stress earth pressure calculations; Rankine, Coulomb, or logarithmic spiral based earth pressure coefficients; hydrostatic pore water pressure computed from surface water(s) and/or piezo metric surface(s) within each of the layered soil regions; pore water pressures computed from line of seepage, steady-state seepage in soil regions with different hydraulic conductivities; gap initiation and propagation using hydraulic fracturing criterion; and boundary pressures (e.g., for wave loading of coastal structures) and/or surface surcharge. Probabilistic analysis is a primary component of Corps I-Wall for new and existing I-Wall analysis. The probabilistic analysis capabilities for the design of new I-Walls results in a statistical characterization of sheet-pile tip embedment. The probabilistic analysis capabilities for analyzing existing I-Walls include the construction of a system response curve (a.k.a., fragility curve), which gives the probability of rotational instability as a function of flood elevation. Examples are provided to highlight each of these capabilities and a users manual for using the graphical user interface for CI-Wall is included.


Descriptors :   FLOOD PLAINS , flooding , flood control , soils , pressure , STRESSES , software tools , Statistical analysis


Distribution Statement : APPROVED FOR PUBLIC RELEASE