Abstract
Silt and tidal land have very low bearing strength, and they are generally very thick. Hence, the time necessary for completion of settlement of a constructed building is very long. If it is not possible to adopt deep foundation methods such as pile driving, other methods, such as soil-substitution or heavily rammed gravel bedding on the foundation can be adopted to form a better surface soil to sustain the constructed building. According to the related principles and formulas of fluid mechanics, soil mechanics, and elasticity mechanics, the author’s have found the optimum thickness of rammed gravel bedding, with better economic and social benefits.
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