Foundation engineering
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1 Foundation engineering Lecture 1 – February 2014 Undergraduate Program in Civil Engineering Faculty of Civil Engineering and Building Services Technical University “Gheorghe Asachi” Iasi
description
Foundation engineering
Transcript of Foundation engineering
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Foundation engineering
Lecture 1 – February 2014
Undergraduate Program in Civil EngineeringFaculty of Civil Engineering and Building Services
Technical University “Gheorghe Asachi” Iasi
from The Code of Hammurabi, Babylon, 1700B.C.
228 - “If a builder build a house for some one and completeit, he shall give him a fee of two shekels in money for eachsar of surface.”
229 – “If a builder build a house for some one, and doesnot construct it properly, and the house which he built fallin and kill its owner, then that builder shall be put todeath.”
232 – “ If it ruin goods, he shall make compensation for allthat has been ruined, and inasmuch as he did not constructproperly this house which he built and it fell, he shall re-erect the house from his own means.”
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by definition
Foundation represents the structural part that:
connects the construction to the supporting ground,
takes over the loads from the structure above and delivers them safely to the ground.
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Foundation engineer should be trained multidisciplinary in
Structural Engineering,
Geotechnical Engineering,
Construction Technology Engineering.
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Classification of foundations is based on several criteria:
- Foundation depth
- Rigidity
- Technology
Definition of the foundation depth
- the level differencebetween the arrangedground level (whenconstruction is completed)and the footing (foundationbase) level.
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Depending on the foundation depth:
Shallow foundations:
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Deep foundations:
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NP 112/2004 - 2013
Structure + basement + foundation + soil= structural system
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Depending on the rigidity
• rigid foundation
• flexible foundation
Df
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depending on the technology
Monolith
Pre-cast
Ultimate Limit States in Geotechnical Design
EQU – loss of equilibrium as a rigid body
STR –failure of the structure (foundation body) –controlled by material strength
GEO –failure of the ground– controlled by soilresistance
UPL – failure by uplift – controlled by water pressure(buoyancy)
HYD – hydraulic heave – soil erosion related tohydraulic gradients
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