pile driving mechanism 



1.5-in. <p pile 



vertical pressure applied 

 (20 to 30 psi) 



silica sand buffer zone 



pile guiding assembly 

 test sample 



rubber membrane 



tank 



18 in. 



inflatable membrane 



'//////////////////////// ////////////////////. 



K 



29.5-in. diam ' 



lateral pressure applied 



Figure 22. Diagram showing pile load test on the calcareous and silica 

 sand. 



67 



