Built-up Sections 



- Fabricated to produce section modulus to resist high bending 

 forces/limit bending 



- Sections symmetrical or asymmetrical depending on loading 

 directions . 



Variations of the Basic Pile Anchor 



/>Ji/eye. 



for fi/ifiji'~ a'm^a^a/ 



/&- wii- direefietm 



(f)_ 



eJiSi/} er/J/e 



gr-^ 



pressure. 



pi/d vsat/ t/ri'fe/i ieM 

 Seer/'or ^ t/eerease. 



/^ liicrease. /aTisni/ 

 iear/'ija UnS^ 



Installation (Refer to Chellis, 1961, 1962, and 1979; Compton, 1977) 



1 . Driving 



- Most piles in soil/soft rock installed by driving 



- Many hammer types easily modified for use to 80 ft 



- Pile hammers developed for underwater operation by Raymond 

 (1979), and Hydroblock (1979), (Hydroblock to 1,600 ft) 



- Can use follower in shallow water 



- Deep water - refer to Anon 1979 for discussion of a self 

 stabilizing "puppet" system for pile installation. 



2 . Drivability 



- Best method for evaluation of pile drivability/hammer effi- 

 ciency is the wave equation. Refer to Smith (1962). 



34 



