ABSTRACT
Deep excavations cause displacement and settlement in surrounding soil during and after excavations. In this study, the effect of a propped diaphragm wall is investigated. An 8 meter deep excavation has been modelled by using a finite element program called CRISP which is based on Critical State Theory. The excavation has been modeled by using 225 nodes and 392 elements. The excavation has been carried out in four stages and it has been assumed that the excavation is propped with struts. When the whole excavation is carried out in one stage and all the struts are placed after the completion of the excavation, larger lateral displacements are observed when compared to placing the struts after each excavation stage. In the case of using a 10.7 meter deep wall, it has been observed that when the whole excavation is completed, the lateral displacements in the excavation base are reduced.
