Numerical Investigation Of Behavior Pile In Liquefied Layer Between Two None Liquefied Layers

semko arefpanah¹

1) Graduated Master of Civil Engineering Geotechnical Approach

IOI Code : XAFA-CGFZB
Publication : International Conference on Civil Engineering, Architecture and Urban Development Management in Iran(cum2018.com)
Abstract :
    The Current Research Studies Piles Behavior In Liquefied Soil With A Close Attention To Axial Load Capacity. Earthquake Stresses In Soil Lands Cusses Pore Water Pressure And Reduces Soil Resistance Thereby Making Liquefaction In The Soil Which Results In Destructive And Costly Effects On The Deep Foundations. Therefor AD Model Of Pile And Soil In Neutral And Static Conditions Had Been Created By Using Computer Modeling And Had Been Analyzed By Finite Difference Method (FDM) In FLAC D. The Results Had Been Compared With Theoretical Approaches Of Meyerhof, Vesic, Janbo، ، And Then Axial Bearing Capacity Of The Pile In Soil Liquefaction Conditions Was Analyzed By Soil Profile Liquefaction Modeling Of Ahar-Varzaghan () Earthquake Apply And Piles Settlement-Force Behavior Had Been Considered. In Modeling The Piles Behavior Has Been Considered In Accordance With The Elastic Model, The Soil Behavior In Static Condition In Accordance With Mohr-Coulomb Model And In Dynamic Condition (Liquefied) In Accordance With Finn Model. Axial Force Reduction Mechanism Had Been Used To Distribute The Axial Force Along The Piles Due To The Activation Of Shear Strength And Pile Movement Ratio To Its Surrounding Soil And Load Transfer From Pile To Soil. Results Of This Study Indicates That In Soil Dynamic And Liquefaction Condition Head Piles Have Times More Movement Than Static Condition. Also Axial Bearing Capacity Of Piles In Soil Liquefaction Condition About  Percent Load Capacity Had Been Reduced In Static Condition. Parametric Studies Indicates That Earthquake Frequency, Liquefaction Soil Layer Thickness And Groundwater Level Are Effective Factors On Axial Load Capacity And Piles Behavior In Soils Susceptible To Liquefaction.

Keywords : pile liquefied soil axial load capacity finite difference method flac d shear strain