8903

8248

كارشناسي ارشد

مكانيك سنگ

اصفهان: دانشگاه صنعتي اصفهان، دانشكده معدن

1392

نه،70ص.: مصور،جدول،نمودار(رنگي)

ص.ع.به فارسي و انگليسي

راحب باقرپور، عليرضا باغبانان

سعيد مهدوري

31/2/93

مسعود چراغي، حميد هاشم الحسيني

1396/12/16

كتابنامه

مهندسي معدن

ID8248

71AbstractTunneling in weak ground has been one of the challenges of engineering technology Try and errorwas given valuable information to technicians Generally temporary support and passing throughdangerous and difficult zones is major purpose in designing and building structures in unstableconditions Koohrang tunnel 3 in the area of Zar ab fault has been a good example for testing engineering skillsand available technology Weak and faulty ground with high amount of overburden and tunnelexisting under high pressure of water makes a condition that necessity of research study is clearbefore performing project In this thesis has been tried by using new advances in computer science and recent softwares tomodel Zar ab fault and check efficiency of artificial ground freezing method that is comparativelynew and less known Simiulation of frosty ground condition require recognition of frozen soil androck and changes during freezing There are good laboratory facilities in some developed countriesfor sampling and exraction of geomechanical properties By recording information in laboratory weak and strongly unstable zone simulated in numerical model and step by step excavationaccomplished As for high overburden ground improvement by freezing around of tunnel is notefficient and safe solely by merging steel liner and ground stabilization before excavation by thismethod finally can reach to an specific state in the beginning freezing pipes has been locatedaround tunnel profile and after reching specified temperature by cooling tunnel digging started incertain advance There are a lot of variants in simulation of condition of ground and material thatneed sensitivity analysis and choosing optimum values for realization of conjugate influence Compared variants were temperature of frozen material resistance of steel liner length of freezingpipes length of support rings excavation advances and support order that is a exploitationsubject The final state that is result of this analyses suggests 5 c for freezing temperature 12 meters forpipes length and support in advance of 1 meter in first 11 meters of tunnel by purpose of reducingexpenses and boosting progress Specifications of steel liner that appliqued have been attached Key words weak and watery ground tunnel artificial freezing steel liner sensibilityanalysis advance support

راحب باقرپور، عليرضا باغبانان

سعيد مهدوري

مسعود چراغي، حميد هاشم الحسيني