Influence of modeling material on undercut slope failure mechanism
- سال انتشار: 1396
- محل انتشار: مجله معدن و محیط زیست، دوره: 8، شماره: 4
- کد COI اختصاصی: JR_JMAE-8-4_011
- زبان مقاله: انگلیسی
- تعداد مشاهده: 270
نویسندگان
School of Mining Engineering, College of Engineering, University of Tehran, Tehran, Iran
Construction Engineering Management, Division of Geo-management, Department of Urban Management, Kyoto University, Kyoto, Japan
Department of Civil and Environmental Engineering, Tokyo Institute of Technology, Tokyo, Japan
School of Mining Engineering, College of Engineering, University of Tehran, Tehran, Iran
چکیده
A series of physical modeling tests were conducted by means of a beam type geotechnical centrifuge machine in order to investigate the drainage impact on the slope failure mechanism under centrifugal acceleration. Meanwhile, the phenomenon of stress redistribution in undercut slopes and the formation of arching effect were studied. For this purpose, a poorly graded sandy soil (Silica sand No. 6) as well as a relatively well-graded sandy soil (Edosaki sand) were used as the modeling materials. The humid modeling material was compacted on a low friction oblique rigid plate simulating the potential slippage plane. The process of undercutting was conducted, while the earth pressure redistribution inside the model was recorded by means of a miniature set of pressure cells. The results obtained showed completely different failure mechanisms for the two different modeling soils. By undercutting the slope, the earth pressure redistributed and the arch action was formed in a slope model made from a well-graded soil leading to a clear arch-shaped failure. However, in using the poorly graded soil, the water was drained out during centrifuge g-up, the modeling material properties changed, and an avalanche failure was observed. Therefore, in selecting a humid compacted soil as the centrifugal modeling material, a well-graded soil is recommended.کلیدواژه ها
Centrifugal modeling, Undercut slopes, Soil material properties, Soil archingاطلاعات 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.