Table A-l. Projected Areas of the SUPSALV Sand 



Anchor-Projectile at Various Stages of 

 Penetration and Conditions of Soil Flow 



Instantaneous 

 Depth of 

 Embedment 



Condition 

 of Central 

 Cavity 



2 

 Areas During Penetration (in, ) 



Flare 

 Frontal 



Total 

 Frontal 



Total 

 Side 



Partially Embedded 

 Fully Embedded 

 Partially Embedded 

 Fully Embedded 



Free flowing 

 Free flowing 

 Plugged 

 Plugged 



214 

 214 



92 

 334 

 638 

 852 



254d 

 14.425 

 90d 

 4950 



d = depth of embedment (in) 



Table A-2 . Estimates of Penetration Depth for 

 Existing and Modified Sand Anchor- 

 Projectiles 



Soil 



Clay 



Sand 



Angle of Internal 

 Friction, cf (degrees) 



- 



- 



30 



40 



Shear Strength, 

 s (psi)** 



0.7 



2.8 



14 



70 



Ultimate Penetration 

 Depth of Existing 

 Projectile (ft) 



41.8 



21.8 



7.5 



3.6 



Ultimate Penetration 

 Depth of Modified 

 Projectile (ft) 



72.8 



49.5 



22.5 



9.5 



s = a' tan <j) for sand 



where a 1 = critical confining pressure or hydrostatic pressure 

 (Figure A-l) 



Note: Weight of projectile = 2500 lb Initial velocity = 200 ft/sec 



34 



