بررسي چگونگي راهبري و بهسازي ماشينهاي حفر تونل (TBM) در شرايط متنوع ژئوتكنيكي با نگرش بر ارتباط علوم زمينشناسي مهندسي و مهندسي مكانيك

Investigating how to guidance an‎d improve tunnel boring machines (TBM) in various geotechnical conditions, focusing on the relationship between engineering geology an‎d mechanical engineering

زمين شناسي

The study of the methods for guiding TBMs in unfavorable geotechnical conditions is one of the issues that has been less addressed in research records so far. On the other han‎d, the failure an‎d improvement of key components of the machine (Main drive system) is also one of the issues that faces much more severe deficiencies in the research literature, so that no significant research has been presented in the aforementioned field by researchers in the fields of geotechnics an‎d geology (both in Iran an‎d outside Iran). Since these topics are directly an‎d indirectly related to the field of mechanical engineering knowledge, their study from the perspective of geology requires interdisciplinary research. To fill this research gap (between mechanical engineering sciences an‎d engineering geology) an‎d to study how geological factors affect machine guidance-improvement (especially in the discussion of the failure of the main drive system), comprehensive approaches an‎d a wide range of research methods are needed. For this purpose, the present research includes geological field studies, preparation an‎d microscopic study of thin rock sections, geochemical analysis of rock samples using XRF an‎d ICP-MS tests, analysis of the lubricating oil of the main drive system of the tunnel boring machine using RDE-AES an‎d Crackle tests, examination of machine deflection measurement data, analysis of machine operator data (thrust, penetration rate, working chest pressure), examination of the results of excavation material grading tests, etc. In order to achieve the research objectives, the results of geological research methods have been combined an‎d integrated with mechanical engineering research methods (especially in the discussion of machine oil analysis, etc.). The aforementioned research methods have been analyzed by focusing on two mechanized excavation sites, in the Ghomroud an‎d Azad water transfer tunnels. The results of this research have covered an important research gap between mechanical engineering sciences an‎d engineering geology in terms of guidance an‎d improvement of tunnel boring machines. Especially considering the lack of geological research on the main drive system of the machine, this thesis has expan‎ded the frontier of knowledge in the field of TBMs.

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