Do you think foundation of structure settle due to design fault? Whatever you think; we think that this is very rare case where foundations settle due to structural design (under design).
So why do foundations settle? Commonly foundation settlement due to change are occurred or rendered to foundation soils that support foundation or structure and sometimes soils surrounding them.
Now what is settlement? Settlement is downward displacement (permanent) of foundation. ‘Permanent’ term is used as in active clay the cyclic downward displacement and heaving can be occurred.
The types of settlement are:
a. Settlement due to weight of structure directly
b. Settlement caused by secondary influences
a. Settlement due to weight of structure directly:
This is the first type of foundation settlement and induced due to weight of structure directly. Say weight of structure may result consolidation of underlain clay layer or may cause densification of loose sand deposit as consequence of compression.
Settlement analysis should be based on precisely determined dead load from structure. Dead load include structural weight from
• Additional loads from fixed members.
In addition to dead load, live load can also result settlement in foundation of structure. Dear reader we will discussed about live loads which should be considered in foundation settlement and also secondary cause of foundation settlement.