Search

Comments on a study on a modified Newmark model for seismic displacements of compliant slopes. Other cases where earthquake deformation is unpredictable.

Surficial failures are shallow slope failures that are usually parallel to the slope face and have a depth of 1.2 m (4 ft) or less. Surficial failures can damage slope landscaping, irrigation, and drainage lines. A particularly dangerous condition can occur if the surficial slope failure mobilizes itself into a debris flow. This paper describes four commonly used methods to repair surficial slope failures. The most economical repair is to use the soil from the failure mass and recompact it into the failed area. This repair method is usually ineffective because the soil shear strength is not substantially changed. To overcome this deficiency, geogrid or cement can be added to the import granular fill during the repair process. Probably the most frequently used repair method is pipe piles and wood lagging. In many cases, this repair is not properly designed and a new surficial failure develops because the pipe piles are overstressed and bend downslope. [ABSTRACT FROM AUTHOR]

Presents an analysis of rainfall-induced debris flows. Initial drained slope failure followed by undrained mobilization of the flow; Concerns on the effects of plant roots on the initial drained slope failure; Effect on hydraulic conductivity on the mobilization potential for a soil.

Focuses on predicting the behavior of soil containing gas bubbles. Disruptive effects of gas; Marginal increase in the undrained shear strength with increase in gas content; Soil cracks due to gas expansion.

Reports on the performance of direct shear tests to determine the shear resistance of soil in contact with smooth and roughened HDPE geomembranes. Details of the triaxial tests on remolded soil; Shear results for sand.

Commends an analysis on slope stability applied in soils. Pressure conditions; Shear strength; Factors causing low effective normal stress.