difficulties arising in silveh diversion tunnel due to complex geology
Publish place: Symposium on Uncertainty Assessment in Dam Engineering
Publish Year: 1384
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
SUADE01_053
تاریخ نمایه سازی: 15 آبان 1390
Abstract:
Silveh damsite, an 89m high embankment dam is located in Northwest of Iran. The construction of its diversion tunnel, 800m long and 5m diameters has already started. Area has undergone a high tectonic activity and low metamorphism. Heavy mechanical erosion has formed thick overburden on the hills and hill slopes. Therefore, the exact location of some faults remained unknown despite extensive geotechnical and geophysical investigations. Consequently, many failures occurred during tunneling where fault planes were encountered. , This fact caused serious challenges to the work. This paper deals with the problems encountered during tunnel excavation and appropriate remedial measures undertaken to remove and control the defects such as failures. Now the situation is getting better and excavation is proceeding safer.
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Authors
H. BAGHERI
Head of Engineering Geology Section, Moshanir Power Engineering Consultants
B. AHADI
Moshanir Power Engineering Consultants