Accession Number : ADA017653

Title :   Underwater Explosive Excavation Testing at San Nicolas Island. California 1972-1973.

Descriptive Note : Technical note Jun 72-May 73,

Corporate Author : CIVIL ENGINEERING LAB (NAVY) PORT HUENEME CALIF

Personal Author(s) : Hallanger,L. W.

Report Date : NOV 1975

Pagination or Media Count : 44

Abstract : These tests were designed to provide preliminary information on a variety of topics relating to nearshore underwater explosive excavation. Topics investigated included: (1) Suitability of standard Navy demolition materials for use in underwater excavation projects; (2) Potential for modifying certain standard Navy demolition charges to allow their use or to improve their performance in underwater applications; (3) Suitability of certain commercially available conventional explosives and of commercial field-mixable, two-component explosives for underwater applications; (4) Identification of operational restraints for nearshore explosives work; (5) Validation of techniques that appear to be suitable for nearshore explosive excavation work; and (6) Determination of the limitations inherent in the techniques that can be applied. Data obtained from a total of 55 test shots consisting of 198 separate charges are presented. In addition, results from underwater operations with a modified track drill and comments on two commercial field-mixed, two-component explosives are included. Specific observations are made regarding: operations and techniques, drilling, logistics and materials, and measurements and data.

Descriptors :   *Excavation, *Underwater explosions, Explosion effects, Explosives, Trenching, Military engineering, Inshore areas, Ocean bottom, Shallow water, Sandstone, Sedimentary rock, Drilling, Craters, Demolition charges, Military equipment, Commercial equipment, Feasibility studies, Performance(Engineering), Mixing, Performance(Human), Manpower, Logistics support, Surf, California, Pacific Ocean Islands, Experimental data

Subject Categories : Civil Engineering
      Ammunition and Explosives
      Explosions

Distribution Statement : APPROVED FOR PUBLIC RELEASE