|
View Paper
ANALYSIS OF A BLAST LOADING NEAR SENSITIVE CLAY SLOPE IN LA ROMAINE VILLAGE, QUEBEC
Session: Landslides and Slope Stability VI / Mouvements de terrain et stabilité des pentes VI
Sarah Bouchard, Université Laval (Canada)
Serge Leroueil, Université Laval (Cambodge)
Denis LeBoeuf, Université Laval (Canada)
Pierre-Luc Deschênes, Ministère des Transports du Québec (Canada)
Pierre Dorval, Ministère des Transports du Québec (Canada)
It is well known that blasting vibrations may be a triggering factor for soil movements and landslides. This paper describes a case history of a large slide caused by blasting in a sensitive clay deposit. The slide occurred on August 1st 2009 in La Romaine village, on the North Shore of the St-Lawrence Gulf. Two types of loading may have affected the slope stability: the blast vibrations themselves and the rapid loading impact stemming from muck-pile formation. The goal of this paper is to provide an analysis of the blast loading characteristics in order to better understand its influence on this slope failure. First, some concepts about blasting vibrations are introduced and landslide case histories involving blasting operations are reviewed. Then, data from La Romaine blast design are presented and the resulting ground motion parameters and the dynamic stresses and deformations are assessed using theoretical and empirical equations.
|
