چکیده مقاله
Clogging and blockage of cutter head and disc cutters is one of the major problems during tunnel excavation in clay bearing soils and rocks that can lead to delays in construction time and to conflicts regarding additional costs and cause reduction in performance of excavation process This phenomenon affects all types of closed face TBMs The Chamshir water conveyance tunnel with a total length of about 7 4 km and boring diameter of 5 3m which is located in South West of Zagros mountain will be excavated with a fully mechanized method through Bakhtiary and Aghajari formations by a single shield machine TBM model S 124 manufactured by Herrenknecht In this paper, clogging potential of these rock units has been investigated based on the existing empirical and laboratory approaches to reach this purpose, and systematic sampling from different clay bearing rocks was carried out during field investigations According to the results obtained, measured liquid limit for all of the samples was in the range of 35 40% that were classified as intermediate The results indicated that the clayey soft rock units will be encountered through Chamshir water conveyance tunnel show low to medium tendency to ‘sticky behavior ’ Also most of the samples were categorized as little to medium clogging risks but can lead to critical condition by increasing water content In addition, Cone penetration apparatus was used to predict adhering of samples to a steel tool surface and clogging potential Results of adherence indicated that clayey soft rock unit samples have medium clogging potential
کلیدواژهها
نویسندگان
s Esmaeili Vardanjani
MSc Student of Engineering Geology, University of Tehran,
j Hassanpour
Assistant professor, University of Tehran, College of Science, School of Geology,
a Cheshomi
Assistant professor, University of Tehran, College of Science, School of Geology,
m Khosrotash
Head of tunneling projects Department at Sabir co,
شیوه ارجاع
Esmaeili Vardanjani, s and Hassanpour, j and Cheshomi, a and Khosrotash, m,1394,Predicting Clogging Potential of Aghajari Formation along Chamshir Water Conveyance Tunnel,The Second Regional Conference and the Eleventh Iran Tunnel Conference,Tehran
ارائهشده در
مجموعه مقالات دومین کنفرانس منطقه ای و یازدهمین کنفرانس تونل ایران11 آبان 1394 · تهران