Settlement Due to Blasting Improvement in Loose Saturated Deposits; Application to 18 Case Studies

Document Type : Research Article


1 M.Sc Student, Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran

2 Associate Professor, Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran


Among various methods for modification and treatment of saturated loose deposits, Explosive Compaction (EC) can be realized as an effective and common deep soil improvement method. In this paper, 18 different sites from U.S, Canada, India, Nigeria, Poland and etc. have been studied. Explosive Compaction successfully has been performed for modifying of loose saturated soils layers with thicknesses varied from 5 to 40 m in these sites. While EC performance, volume change due to densification ranged about 2% to 10% was observed. Analysis on the compiled database focused for Powder Factor (PF) role in induced settlement due to EC. Moreover, by using nonlinear optimization, a new relation has been proposed for settlement prediction in which PF, depth of Explosive charges and number of explosion phase’s factor have been considered simultaneously. This relation indicates it is required to increase used powder factor by increasing depth of charge to get an enough compaction as well as influence of first and second phases in final settlement is more than further phases. 


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