An Introduction to Field and Laboratory Investigations for Foundations in Expansive Soils

This publication presents guidance and information for the geotechnical investigation necessary for the selection and design of foundations for heavy and light buildings constructed in expansive clay soil areas. The information in this publication is generally applicable to many types of structures such as residences, warehouses, and multistory buildings. Emphasis is given to the maintenance of an environment that encourages constant moisture conditions in the foundation soils during and following construction. Special attention must always be given to specific requirements of the structure such as limitations on allowable differential movement. The guidance and information provided in this publication can significantly reduce the risk of undesirable and severe damages to many structures for numerous expansive soil conditions. However, complete solutions for some expansive soil problems are not yet available; e.g., the depth and amount of future soil moisture - changes may be difficult to predict.