Self-Boring Pressuremeter Study of San Francisco Bay Mud

by G. Wayne Clough, (M.ASCE), Prof. of Civ. Engrg.; Stanford Univ., Stanford, Calif.,
Gordon M. Denby, (M.ASCE), Soils Engr.; Roger Lowe Assocs., Seattle, Wash.,

Serial Information: Journal of the Geotechnical Engineering Division, 1980, Vol. 106, Issue 1, Pg. 45-63

Document Type: Journal Paper


In the early 1970's a self-boring capability was added to the pressuremeter by workers in England and France in order to reduce disturbance effects during the insertion of the pressuremeter in the ground. However, during the intervening years since the introduction of the probe, the results obtained using it have been largely at odds with those determined in high quality laboratory tests. In this investigation, self-boring pressuremeter tests were performed at two sites in San Francisco Bay Mud. It was found that the details of the drilling and flushing procedures used during probe advance were very important to the quality of the results obtained. Working out the proper techniques by trial, soil parameters were obtained for San Francisco Bay Mud which were in good agreement with those from high quality consolidated undrained laboratory tests. Also pressuremeter tests performed at the site of a slurry wall supported excavation were successful in picking up the stress changes induced by the excavation.

Subject Headings: Boring | Bays | Mud | Probe instruments | Laboratory tests | Site investigation | Consolidated soils | Excavation | Europe | England | United Kingdom | France

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