Tunnel design and construction process in difficult ground conditions with Analysis of Controlled Deformations (ADECO) approach; a Case Study

  • سال انتشار: 1397
  • محل انتشار: مجله بین المللی معدن و مهندسی زمین، دوره: 52، شماره: 2
  • کد COI اختصاصی: JR_IJMGE-52-2_007
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 293
دانلود فایل این مقاله

نویسندگان

Majid Taromi

Bsc

Abbas Eftekhari

Mining Engineering Department, Faculty of Engineering, Kashan University, Kashan, Iran.

چکیده

The 10.6 km long Sabzkuh water conveyance tunnel is currently under construction in High Zagros structural zone, located in western Iran, has used conventional (in section T1) and mechanized (in section T2) methods. The section T1 of the tunnel driven through alluvial geological units with great complexity in an area high potential for sliding and water-bearing fault which has made the excavation operation encounter many challenges. After excavation 35 m of the tunnel using conventional methods, geological problems and inappropriate method of tunnel excavation resulted in the tunnel collapse and failure in the tunnel inlet portal. After the incidence of the collapse, the Design and Construction Process (DCP) of tunnels was revised by using Analysis of Controlled Deformations in Rocks and Soils (ADECO-RS) in conjunction with the Sequential Excavation Method (SEM). The ground improvement in the portal and tunnel excavation continued in five phases including survey, diagnosis, therapy, operation, and monitoring. The application of this approach into construction of Part T1 of the tunnel increased the safety and minimized risks and costs despite geological complexities and hazards. Moreover, the excavation process with appropriate daily advance rate of 1 to 1.5 meters was achieved according to the predicted schedule.

کلیدواژه ها

ADECO-RS, Daylight collapse, Difficult geological conditions, Design and Construction Process (DCP), Sabzkuh tunnel

اطلاعات بیشتر در مورد COI

COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.

کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.