Publication Abstract

International Workshop on Micropiles 1997, Seattle, WA, (DFI)

Design Methodology: Micropiles for Slope Stabilization and Earth Retention
Tom A. Armour PE

Geotechnical engineers around the world are faced with the perennial problem of landslides affecting facilities for which they must design safe and economic solutions. Many of these problems can be solved in the conventional ways of reducing driving forces or increasing resisting forces by the displacement of large quantities of earthen materials. Unfortunately, these types of solutions are not always possible due to adverse environmental factors or the high costs of right-of-way acquisition and construction in urbanized areas. In the past 25 years American engineers have incorporated into their slope stabilization projects some of the innovative solutions developed in Europe. Of particular interest recently is a concept originally developed in Italy for underpinning historic buildings and monuments using pali radice or root piles, (now termed, micropiles). This presentation will discuss the recently developed micropile classification system, CASE 1 and CASE 2 slope stabilization and earth retention methods, construction techniques and materials, recommended design methodology of CASE 1 nonreticulated micropile structures and cost feasibility as presented in the FHWA sponsored “Micropile Design and Construction Guidelines Implementation Manual.”

 article #301; publication #30 (IWM-1997)