ABSTRACT

This paper concerns the use of the conventional Coulomb theory of lateral earth pressure against retaining structures with some empirical modifications in the design of‚ cantilever sheet piles. The design procedure adopted basically involves the computation of the embedment depth and the maximum bending moment in the sheet pile. Design charts are developed for a wide range of soil types, water level heights and loading conditions. In order to portray the actual conditions on the sheet pile, the design factors, namely, the soil properties, height of water level, and surcharge loads are treated as random variables. Using the developed design charts and through a first-order Taylor's series expansion, the variation in the embedment depth as well as the maximum moment are evaluated and presented in a graphical form. The final design process entails the combination of the mean and variance of the design requirements based on a given probability of failure (reliability). Examples to illustrate the use of the reliability-based design method are presented.

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