توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Soil Characterization in Super Soft, Sensitive Soils of Urmiyeh Lake
نویسنده(ها): ،
اطلاعات انتشار: چهارمین همایش بین المللی مهندسی ژئوتکنیک و مکانیک خاک ایران، سال
تعداد صفحات: ۷
In the early 1980΄s the Urmiyeh Causeway was constructed at the Urmiyeh Lake’s narrowest part to connect the eastern part of Iran to the western area and Europe. Geotechnical investigations carried out the construction of associated 1260 m length Causeway Bridge. For design and analysis of 400 driven pipe piles, piezocone has been considered as a major tool and were performed in twelve locations along the bridge route to depths of 100 m below the lakebed. Soils encountered include super soft and sensitive gray to dark gray and somewhere yellowish deposits known as ‘Tabriz Marl.’ which is visually classified as a high liquid limit silt and clay. This paper evaluates CPTu records presented on two CPTu soil classification methods. Results indicate that for soft sensitive deposits the mobilized pore pressure can be realized as a valuable parameter for soil behavior interpretation

۲Evaluating CPT and CPTu based pile bearing capacity estimation methods using Urmiyeh Lake Causeway piling records
نویسنده(ها): ، ،
اطلاعات انتشار: Scientia Iranica، هجدهم،شماره۵، ۲۰۱۱، سال
تعداد صفحات: ۱۱
Urmiyeh Lake is the largest super salt water situated in the north–west of Iran. A causeway embankment has been constructed in the narrowest part of the lake from both sides about 13.5 km, in order to connect two provincial capital cities of Tabriz and Urmiyeh of eastern and western Azerbaijan provinces to Europe through Turkey, while a 1280 m opening in between linked up by a bridge. Based on soil classification methods, utilizing CPTu data and soil sampling, the lake sediments consist of 150 m of soft and very sensitive clay. In order to evaluate the bearing capacity of driven piles of the bridge, eight long steel piles with diameters of 813 and 66 m and lengths of 75 m have been instrumented and monitored based on static and dynamic load testing program. Piezocone (CPTu) results are also available from adjacent pile locations. Results of pile capacity calculation based on direct CPT and CPTu methods demonstrate that reasonable accuracy can be achieved in reference to dynamic testing. Therefore, combination of CPTu data with dynamic testing results can be considered by engineers for predicting bearing capacity of piles in offshore and bridge structures, where the static pile load testing is difficult, time consuming and expensive in marine environment.
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