چکیده مقاله
The soil layers in south west of Iran are mostly soft and fine Raft foundations undergo excessive settlement on these soils In these cases, using piled raft foundations can decrease the settlements to some extent But because of low stiffness of soft clay, settlement is still more than expected An appropriate solution is soil improvement In this paper, a 3D nonlinear continuum FEM numerical model is adopted to investigate the possibility of increasing the efficiency of the pile raft systems through top soft soil layer improvement The improvement of the top soil layer is possible by for example, backfilling on the soft ground surface, removing and replacing the top layer with compacted granular material, and mixing the top layer with cement or lime The improved top layer thickness could be in the range of 1 through 4 m, in practical applications Average settlement, maximum settlement, differential settlement, piled raft coefficient and load distribution in center pile for soft clay and improved clay are compared It was observed that soil improvement caused settlement reduction significantly
کلیدواژهها
نویسندگان
a Javanbakht Samani
Dept of Civil & Environmental Engrg, Amirkabir University of Technology
K Fakharian
a Javanbakht Samani Dept of Civil & Environmental Engrg, Amirkabir University of Technology
شیوه ارجاع
Javanbakht Samani, a and Fakharian, K,1391,Numerical Modeling of Piled Raft Foundations on Improved Soft Clay,9th International Congress on Civil Engineering,Isfahan
ارائهشده در
مجموعه مقالات نهمین کنگره بین الملی مهندسی عمران19 اردیبهشت 1391 · اصفهان