Finite Element Analysis of a Deep Excavation: A Case Study

Çokça, Erdal
Aktaş, Tuğçe
Çalışan, Oğuz
world popı_ılation increases clay by day. In order to meet this increasingpoprılation,s basic needs srıch as slreltering, transportatıon aıd sociai actjvities,necessityforundergroı-ındstrrıctı-ıresgracluallyincrease.Asarestılt,deel-ıexcava.tions becr)me more in1portanı eaclr passing day while excavations deepen. ln orderto design the optimum iystem which ensrıres tlre safety of environment, roads, strrıc_trıres and the excavation, the excavation properties shoııtd be modelled so that itreflects the actual geometry andboı_urdary conditions. The ground paraıneters, wl,ıichhave cnıcial etl,ect on the solution, should also be determiı]ed precisely. In this study,adeepexcavationwithadepthof33.0mperforıneclonover.consolidatedAnkaraclay is investigatec]. The excavation system was designed to be consisted of dolıblc_row of piies supported by mı"ıltilevel anclrors. Inclinoııeter and load cell installa_tions on the shoring elements have been made for tlıe inspection of tlre pile walldisplacements arıd anchor forces. Back analysis is ınade in order to obtain tlre idealground parameters which give the measrıred clisplaceıneırts and anchor forces. Thisanalysis is conductec] by a series of plaxis analysis in rvlrich ground pararrreters arechanged iteratively in order to 1ind their values tlrat give the measrıred displace_ments and forces. For these Plaxis analyses, three difl'erent models naınely; Hard_ening soil, Hs small and Mohr coulonrb are used and grolıııc,l paraıneters are deter_mined. Finally, groı.ınd paıameters obtalned by back aı-ıalvsis for ditferent soi1models and the parameters determined from fieid tests are coııpared ancl a correla_tion is proposecl to Simulate the belravior of over cons..ılidated Ankara clay.
Citation Formats
E. Çokça, T. Aktaş, and O. Çalışan, “Finite Element Analysis of a Deep Excavation: A Case Study,” 2018, Accessed: 00, 2021. [Online]. Available: