4476

4204

كارشناسي ارشد

خاك و پي

اصفهان:دانشگاه صنعتي اصفهان، دانشكده عمران

1387

سيزده، 261، [II] ص: جدول، نمودار

ص.ع. به: فارسي و انگليسي

حميد هاشم الحسيني، بهروز كوشا

اميرمهدي حلبيان

1388/2/27

محمود هاشمي اصفهانيان، محمدعلي روشن ضمير

مهندسي عمران

ID4204

به فارسي و انگليسي: قابل رويت در نسخه ديجيتال

Numerical Study of Soil Nailed Walls Behavior under Static Conditions and Dynamic Loads due to Earthquakes Alimohammad Sheikhbahaei Ali3726@cv iut ac ir Date of Submission 20 Dec 2008 Department of Civil Engineering Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiS Hamid Hashemolhosseini HamidH@cc iut ac irBehrooz Koosha cgkoosha@cc iut ac irAmir M Halabian Mahdi@cc iut ac irAbstract Soil nailing is an efficient technique for stabilizing different soil structures This method has been widely used toimprove stability of slopes Soil nailing constructions commonly involve three basic process excavation nail installationand face stabilization The nails are inserted into ground by either drilling or grouting and are usually arranged in bothhorizontal and vertical directions There are many different approaches to understand Soil nailed wall behavior under static conditions as well as dynamicloadingindicate satisfactory consistency with measurements of the full experimental wall Symmetric boundary conditions areconsidered to undertake static analyses Having better perception of wall performance an inclusive parametric study isconducted considering influence of different factors on wall behavior Some features such as soil nail inclination naillength soil strength properties nail layout on wall surface nail length pattern slope inclination an soil density areamong those important parameters which are studies during analyses Results indicate that nail inclination maintain toimprove wall performance but until some specific extent Rather very steep nails result in weakened performance ofstructure leading to its failure Moreover results indicate that limit equilibrium methods like kinematic approach leads tooverestimation of mobilized forces along nails Soil constitutive behavior for dynamic analyses is predicted taking into account soil hysteresis behavior An whererepresents soil subgrade The boundary conditions are considered to be antisymmetric during dynamic analyses Effectsof different crucial factors are monitored during investigations Some parameters such as soil constitutive behavior nailinclination nail length as well as soil strength properties have been examined In final some graphs attributed to lateralearth pressure behind wall facing in addition to peak acceleration response peak horizontal displacement and maximumtensile force along nails are presented better investigating behavior of these structures Key WordsSoil nailed wall limit equilibrium methods soil hysteresis behavior dynamic loading

حميد هاشم الحسيني، بهروز كوشا

اميرمهدي حلبيان

محمود هاشمي اصفهانيان، محمدعلي روشن ضمير