Foundation 1
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Transcript of Foundation 1
7/17/2019 Foundation 1
http://slidepdf.com/reader/full/foundation-1-568e61febed70 1/15
FOUNDATION ENGINEERINGFOUNDATION ENGINEERING
Teacher:
János Szendefy, PhD – lecturer
Budapest8 September 2010
7/17/2019 Foundation 1
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Foundation Engineering
1. Information about the course
Credit point: 42 hours lecture / week 2 hours practice/ each second week
Test: 45 min. on 27 OctobreDeadline of projects:1 project: 3 November2 project: 8 December
Admission for the exam:Pass the test,Deliver the projects,Participate the practices 4 times during the semester.
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Foundation Engineering
2. Contents of semester
Function of foundations
Soil exploration
Shallow foundations:•T es•Designing•Settlements•Stability
•Design onto disadvantageous soils
Deep foundations:•Piles•Diphragma walls• y n er an ox ca sson
•Excavation, retaining structures•Dewatering
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Foundation Engineering
3. Function of foundations, basic conceptsFoundation: A structure elements, which transfer the load
Stress in the soil
Settlements
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Foundation Engineering
3. Function of foundations, basic concepts
Soil layers
a ow oun at on eep oun at on
roun water eve
Neigborhood buildings
Superstructure
Building situations
Special structure element: difficult standardization, built
under the surface, difficult to repair, its effect to thesuperstructure
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Foundation Engineering
4. Soil exploration
Aim: find out the soil layers on the site and determinet e soi parameters to esign t e most suita e oun ation
Site visiting:
Environment of the site
Neighborhood buildings (foundation, cracks)
Flora
Local information
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Foundation Engineering
4. Soil exploration
rect processes :
Test pit
Borehole small or lar e diameter
Indirect processes :
Sounding processes (in-situ testing devices)
Geophysical processes
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Foundation Engineering
4. 1. Direct processes
Advanta es : Disadvanta es :
ReliableUndisturbed sample
Small depthJust above groundwaterEarth retaining
General using: foundation of existing buildings
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Foundation Engineering
4. 1. Direct processes
Small diameter
Small (easy to move)Cheap
sa van ages :Not always applicableSmall diameter
General using: 0-8 m depth, normal soils
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Foundation Engineering
4. 1. Direct processes
Large diameter
Advantages :Fast (economical in huge project)Large diameterDeth without limit
Disadvantages :More expensiveBig size
Heavy (soil, rock)
General using:8-60 m depth, diameter 100-300 mm
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Foundation Engineering
4. 1. Direct processes
Large diameter
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Foundation Engineering
4. 1. Direct processes
Undisturbed sample
Strength characteristicDeformation charachteristic
Disturbed sample
Water content
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Foundation Engineering
4. 1. Direct processes
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Foundation Engineering
4. 1. Direct processes