Soil Mechanics Course summary Preparation for the exam What’s...
Transcript of Soil Mechanics Course summary Preparation for the exam What’s...
CIE_3008 토질역학 및 실험 1
Soil Mechanics
Course summary
Preparation for the exam
What’s next?
CIE_3008 토질역학 및 실험 2
Course summaryLecture 1: Soil Composition
Lecture 2: Soil compaction
Lecture 3: Flow of water in soil
Lecture 4: Stress in soil mass
Lecture 5: Soil compressibility
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Course summaryLecture 1: Soil Composition
Soil origin – grain sizeWeight – Volume relationship
Definitions: S, e, n, w, Dr, Consistency (Atterberg limit), ActivitySoil structureSoil classification
Lecture 2: Soil compactionLaboratory test Meaning of compaction curveField compaction curveStructure of compacted soil
Lecture 3: Flow of water in soilDarcy’s lawHow to draw the flow netHow to calculate the seepage forceHow to draw variation of hydraulic headHow to measure permeability
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Course summaryLecture 4: Stress in soil mass
Stresses acting on a plane – Mohr CoulombTotal, effective stresses, pore pressureCalculate the variation of vertical stress with depth
Lecture 5: Soil compressibilityMeaning of EOP consolidation curveCalculate settlementCalculate time required for consolidationDerive stress-strain relationship for 1D consolidation
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Final ExamSite(s) is given
Basic information (e.g., unit weight, porosity, depth to bedrock, water table depth)Lab test data (e.g. Grain size distribution test, Atterberg limit, compaction test, permeability test, consolidation test).
Classify the soilDetermine in-situ stressCalculate the response of the site and/or optimum design procedure under a given construction activity
Examples:Calculate possible excavation depthCalculate pump capacity for the excavationCalculate necessary compactionCalculate settlement due to consolidation / time required for primary consolidation Calculate the change in stresses under applied load
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Final Exam
How to perform a lab test / How to interpret the lab test results
Both calculation / description problems
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Soil properties we need in design
Two criterionStress < StrengthDeformation < Allowable
What you need to know:Strength (Drained / Undrained)Stiffness
Laboratory testTriaxial / Direct shear / Simple shear
In-situ testPenetration testNon-intrusive (geophyiscal test)
CIE_3008 토질역학 및 실험 8
Soil properties we need in design
Two criterionStress < StrengthDeformation < Allowable
What you need to know:Strength (Drained / Undrained)Stiffness
Laboratory testTriaxial / Direct shear / Simple shear
In-situ testPenetration testNon-intrusive (geophyiscal test)
CIE_3008 토질역학 및 실험 9
Soil properties we need in design
CIE_3008 토질역학 및 실험 10
Problems we solve
Design problems
Retaining wall – earth pressure
Excavation
Slope stability
Shallow foundation
Deep foundation
CIE_3008 토질역학 및 실험 11
Problems we solve
Design problems
Retaining wall – earth pressure
Excavation
Slope stability
Shallow foundation
Deep foundation
CIE_3008 토질역학 및 실험 12
Problems we solve
Design problems
Retaining wall – earth pressure
Excavation
Slope stability
Shallow foundation
Deep foundation
CIE_3008 토질역학 및 실험 13
Problems we solve
Design problems
Retaining wall – earth pressure
Excavation
Slope stability
Shallow foundation
Deep foundation
CIE_3008 토질역학 및 실험 14
Problems we solve
Design problems
Retaining wall – earth pressure
Excavation
Slope stability
Shallow foundation
Deep foundation
CIE_3008 토질역학 및 실험 15
Problems we solve
Design problems
Retaining wall – earth pressure
Excavation
Slope stability
Shallow foundation
Deep foundation
CIE_3008 토질역학 및 실험 16
Tools we use
Analytical solution
Empirical solution
Numerical solutionBeam – Spring approachFinite element method (FEM) / Finite difference method (FDM)
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진 로