Publisher's Synopsis
Excerpt from Retaining-Walls for Earth: Including the Theory of Earth-Pressure as Developed From the Ellipse of Stress; With an Appendix Presenting the Theory of Prof. Weyrauch
The first edition of this work was based upon the theory advanced by Prof. Weyrauch in 1878, but owing to the length Of the demonstrations used by him, it was thought advisable to present different and shorter demonstrations in this edition. To show that the new demonstrations give identical results with those Obtained by Prof. Weyrauch, his demonstrations have been given in an appendix as they appeared in the first edition.
The new demonstrations are based upon the theory first advanced by Prof. Rankine in 1858. Those readers who are familiar with Rankine's Ellipse of Stress can omit pages 27 to 35, inclusive, in following the demonstrations.
An attempt has been made to present the theory in a shape easily followed by those who have only a knowledge of algebra, geometry, and trigonometry; whenever cal culns has been resorted to, the work has been simplified as much as possible. For convenience in practice, the forma las have been arranged in a condensed Shape in Part I, and are followed by numerous examples illustrating their application.
The values of various coefficients have been computed and tabulated and will be found to very materially decrease the labor of substitution in the formulas.
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