Design of Excavation Blasts to Prevent Damage

by Yong S. Chae, (M.ASCE), Prof. of Civ. Engrg.; Rutgers Univ., Piscataway, N.J.,

Serial Information: Civil Engineering—ASCE, 1978, Vol. 48, Issue 4, Pg. 77-79

Document Type: Feature article


Effects of ground vibrations on nearby structures and people resulting from blasting operations have become a major environmental problem and concern to the engineer and the contractor as well as to the general public. Empirical rather than theoretical approaches have been used to relate the intensity of ground vibration to the degree of structural damage, and to relate the weight of explosives to the intensity of ground vibration at a given distance. The current recommended design criterion of 2 inches per second peak particle velocity for all types of structures is inadequate. Revised design criteria based on the type, age and stress history of the structure are proposed. Human response to vibration is found to be a very critical and sometimes a controlling factor in the design of blasting operations.

Subject Headings: Ground motion | Excavation | Blasting effects | Particle velocity | Stress history | Human factors | Environmental issues | Contractors and subcontractors

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