COEFFICIENT OF LATERAL STRESS FROM OEDOMETER CELL. PROCEEDINGS OF THE ELEVENTH INTERNATIONAL CONFERENCE ON SOIL MECHANICS AND FOUNDATION ENGINEERING, SAN FRANCISCO, 12-16 AUGUST 1985

An oedometer ring specially made for the measurement of lateral stresses in a soil specimen was successfully used to establish the variation of the coefficient of earth pressure at rest with overconsolidation ratio. The ring contains a fluid-filled chamber separated from the soil specimen by a thin teflon wall. A very stiff and sensitive pressure transducer is directly connected to the chamber fluid and measures the lateral stress. The paper presents the results obtained on two onshore and two offshore Norwegian clays. These results are compared with other direct and indirect determinations of the coefficient of lateral stress, both for normally and overconsolidated clays (loading, unloading and reloading). For the covering abstract of the conference see IRRD 287689. (Author/TRRL)