CONTENTS 



page 



INTRODUCTION 1 



TEST DESCRIPTION 1 



FABRICATION 2 



EMPLACEMENT 5 



INSPECTIONS 10 



RESULTS 10 



Implosion 10 



Permeability 13 



SUMMARY 16 



ACKNOWLEDGMENTS 17 



REFERENCES 18 



APPENDIXES 



A — Concrete Materials 19 



B — Soil Properties 27 



C — Compressive Strength of Concrete for Sphere 3 28 



D — Calculation of Seawater Intake 31 



LIST OF SYMBOLS 35 



