5854

5469

كارشناسي ارشد

عمران

اصفهان: دانشگاه صنعتي اصفهان، دانشكده عمران

1389

[نه]،170ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

محمود وفائيان

مه رشك ميداني

11/2/90

بهروز كوشا، مسعود مير محمد صادقي

مهندسي عمران

ID5469

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Effects Of Ground Excavation On The Vicinity Buildings Najme Hashemi N Hashemishahraki@cv iut ac ir Date of Submission 2011 Department of Civil Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor M Vafaeian mahmood@cc iut ac ir Abstract The need for construction of excavations in urban areas requires control of the surrounding ground since excessive ground movements damage adjacent properties Construction of an excavation inevitably induces lateral movement and settlement of the ground which can have detrimental effects on adjacent buildings Braced excavation is commonly involved in the construction for basements of high rise buildings stations of underground transportation systems and underground parking spaces Construction of a braced excavation system inevitably induces lateral movement and settlement of the ground which can have detrimental effects on adjacent buildings Past studies of building response to ground displacement have primarily dealt with the tolerance of buildings to settlement under their own weight and disregarded the effect of excavation So studeis in the field of buildings settlement due to excavation seems to be necessary In this thesis A series of 2D nite element analyses were performed using a commercial nite element program PLAXIS to examine the building movement characteristics The comparison between the emprical method and the Plaxis results for critical height is presented and the effects of cohesion friction angle and unit weight was studied on critical height Critical height increases with cohesion and friction angle and decreases with unit weight Building s settlement under their own weight was in elastic phase and according to Mohr Coulomb model the elastic parameters i e young s modulus and poisson s ratio effect on it and in the other hand on buildings settlement due to excavation all parameters of Mohr Coulomb model are effective We also studied the effect of soil excavation diaphragm wall building and struts parameters on buildings settlement The effect of mohr coulomb parameters on building s settlement showed that in both elastic and plastic phases vertical displacement due to excavation decreases with increasing in young s modulus With increasing in poisson s ratio in elastic phase vertical displacement due to excavation decreases and in plastic phase is vise versa With increasing in cohesion friction angle and Dilatancy angle vertical displacement due to excavation increases and in plastic phase is vise versa In elastic phase vertical displacement due to excavation decreases with increasing in the width of building and the number of building s stories and increases with increasing in the number of building s in plastic phase Keywords Excavation Settlement Mohr Coulomb model

محمود وفائيان

مه رشك ميداني

بهروز كوشا، مسعود مير محمد صادقي