An in-Situ Experimental Study on RCC Cofferdam Vibration Induced by Underwater Explosion

Abstract

This paper presents some experimental data on roll compaction concrete cofferdam vibration induced by underwater explosion. A formula for the bubble pulse period of underwater explosion is proposed via dimension analysis and compared with Cole formula. An experiential formula is summarized on the relation among the structure vibration velocity, explosive charge and the distance from charge to structure. The formula indicates that the structure vibration velocity is directly proportional to square root of the charge when the charge package was near the structure. When the distance is farther between the charge and the cofferdam, the peak particle velocity (PPV) is smaller.