Dynamic 



Impulse Loading - Non-rhythmic loads > static capacity, < 10 



seconds in duration - sands; < 10 minutes duration - clays, 



Cyclic Loading - Repetitive loading with double amplitude 

 magnitude > 5% static capacity. 



Earthquake Loading - Cyclic loading induced to the entire 

 soil mass by earthquake energy. 



Plate Anchor Design Process (Refer to Beard, 1980) 



1. Site Survey: Deteinnination of hazardous/unusual condition, 

 soil property selection, soil type determination. 



2. Determine Anchor Embedment Depth 



a. Control embedded anchors (e.g., driven, jetted, vibrated, 

 screwed) . 



Depth = f/soil type, strength, plate, size, equipment 

 limitations . 



b. Dynamically embedded anchors (propellant-embedded) 



Cohesive soil 



Calculate by method of True (1976) 



Cohesionless soil - Penetration prediction schemes 

 are poor. 



Calculated Penetrations for 

 CEL Clay Flukes 



Estimated Penetrations for 

 CEL Sand Flukes 



Proxinal turbidi 



Anchor Peoetr. 



19.5 (6«) 



17.4 (57) 



14.9 (49) 



12.5 (41) 

 22 (72) 



19. 



(63) 



15. 



(50) 



24. 



(79) 



24. 



(81) 



15.9 (52) 



13.1 (43) 



11.9 (39) 



10.1 (33) 



18.3 (60) 



16.5 (54) 



12.8 (42) 



19.8 (65) 

 I 20.7 (68) 



15.9 (52) 



.7 (35) 



.2 (27) 



.9 (26) 



.0 (23) 



.9 (39) 



.7 (35) 



.2 (27) 



.1 (43) 



.3 (47) 



.6 (25) 



.8 (19) 



.8 (19) 



.2 (17) 



1.2 (27) 



.6 (25) 



.8 (19) 



•.2 (30) 



1.1 (33) 



Anchor Pesetr; 



3.8 (12.5) 



5.2 (17) 



7.6 (25) 



9.2 (30) 



Medium 

 Dense 

 Sand 



3.4 (11) 



4.9 (16) 



7.0 (23) 



E.2 (27) 



"♦ = 30 degrees; 1^ - 1,760 kg/in' (110 lb/£t») 

 '♦ = 35 degrees; t^ - 1,920 kg/»> (120 lh/ft») 

 S = 40 degrees; 1^ = 2,080 kg/o> (130 lb/ft') 



"J 



3.1 (10) 



4.6 (15) 



6.4 (21) 



7.6 (25) 



10 



