|M.Sc Thesis||Department of Civil and Environmental Engineering|
|Supervisors:||Assoc. Prof. Talesnick Mark Lloyd|
|Prof. Emeritus Baker Rafael|
This research concerned the computation of sheet pile walls based on the Subgrade Reaction Method. In this study a non-linear "Subgrade Reaction Method" is proposed. This method computes the development of the pressures acting on and the sheet pile walls deflection according to an empirical load-deflection curves (p-y),(API). A satisfactory embed length into the soil insures stability of the sheet pile wall. All the approaches that analyze sheet pile walls deal with the effect of the embedded wall part. The accepted methods such as the "Continuum Mechanics" takes into consideration the final state of equilibrium without considering the effect of deflection when analyzing sheet pile wall. On the other hand, the "Subgrade Reaction Method" considers this, as important. The current study deals with unsupported steel sheet pile walls. It is assumed that the soil is loose sand and water table is deeper than the sheet pile bottom. The model that is used for the soil is a hyperbolic model. The basic parameters required are angle of the internal friction and the effective overburden pressure. The model was developed for an element embedded in the soil subjected to pressures from both sides. The model was modified with an acceptable assumption suitable to sheet pile walls which include two parts, the unsupported height and the embedded length. From an economic point of view it is possible to use a stiff, short length sheet pile wall or a flexible, long length sheet pile wall. The main question is which combination is more economical. Investigation of the behavior of steel sheet pile sections in loose sand, led to the conclusion that an intermediate wall section is the most economical.