Excerpt from Evaluating Slope Stability Prior to Road Construction The hazard potential for mass erosion in the batholith is greatly increased following a disturbance such as logging or road construction. Vegetation removal often results in removal of a critical margin of safety afforded the soil by roots and soil arching between stems (gray and Megahan, Changes in slope hydrology associated with interception and redistribution of subsurface flow following road construction also increase the potential for mass erosion (gray and Megahan Jensen and Cole (1965) reported that 80 of 89 landslides occurring in the South Fork of the Salmon River in April, 1965 were associated with roads. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Provides a complete guide to the study, design, construction and management of landslide and slope engineering measures for mountain roads, with emphasis on low-cost. The geographical focus is on the tropics and sub-tropics, but is also highly relevant to other regions where heavy rain, steep slopes and weak soils and rocks combine to create slope instability. The causes and mechanisms of landslides are described, and the hazards they pose to mountain roads are illustrated. Methods of desk study, field mapping and ground investigation are reviewed and illustrated, with emphasis on geomorphological and engineering geological techniques. The design and construction of alignments, earthworks, drainage, retaining structures, the stabilization of soil slopes and rock slopes, and the control of erosion on slopes and in streams covered. Slope management as part of road maintenance and operation is reviewed, and procedures for risk assessment and works prioritization are described.