5 \ "■ » ifo 



"">-T k p|| <J> 5COPI 



—i 1 1 r — i r — i i 1 — t — i -i 



IN 1 2 3 4 5 6| 



(@> CIVIL ENGINEERING LABORATORY 



Figure 22. Quartz accelerometer . 



-A/Vta 



Tektronix 

 Computer 













CRT 



















Power 

 Unit 





































Voltage 











Supply 













Forct 



sensor on hammer 





Hydrophone 



k 





5 



Impact 



hammer 





NJ/' 



li 





Pile lays horizontally in the tank 



Figure 23. Schematic of impact test configuration, 



40 



