Landslide Investigation and Correction

The occurrence, cause, and correction of landslides and earth movements in the San Francisco Bay region of California are described in this paper. Examples are cited of (1) a shear slide in which hydrostatic uplift on an unbalanced slope resulted in mass movement of the unconsolidated slope material; (2) a shear slide caused by the overstress of clayey material on a slope that had absorbed a water load; (3) a slide that developed along the contact between two rock formations; (4) a detrital slide caused by the seasonal saturation of soil; (5) a detrital slide resulting from a geochemical breakdown of rock cut slopes; (6) a slide of street fills founded upon soils subject to movement when saturated; (7) a detrital slide generated by earthquake shock; (8) slides started by ground-water pressure; and (9) soil creep.