301001 Lecture Notes - Lecture 2: Deep Foundation, Norwegian Code

• School: UWS
• Department: University of Western Sydney
• Course: 301001
• Professor: Chin Leo

Document Summary

Piles are almost always arranged in a group of three or more. Furthermore, a group of piles is commonly tied together by a pile cap, which is attached to the heads of the individual piles and causes the several piles to act together as a pile foundation. The efficiency of a pile group is the capacity of a group of piles divided by the sum of the individual capacities of the piles making up the group. In the case where a group of piles comprises end-bearing piles resting on bedrock (or on a layer of dense sand and gravel overlying bedrock), an efficiency of 1. 0 may be assumed. In other words, a group of n piles will carry n times the capacity of a single pile. An efficiency of 1. 0 is also often assumed by designers for friction piles driven in cohesionless soils. One equation that has been used to compute pile group efficiency is known as the converse-