ABSTRACT
It is known that time-dependent behaviour could lead to significant displacements caused by deep excavation in central Jakarta in which the ground mainly consists of a thick clay layer, occasionally with sand. From previous studies, it is aware that up to 23 to 26% of total wall deflection is caused by time-dependent behaviour and consolidation plays a key role in that. In the absence of reliable results from consolidation test, there still is an uncertainty about influence from time-dependent behaviour and it thus has a need to explore more. In this paper, a reasonable range of consolidation coefficient of Jakarta clay will be determined first, and then parametric studies will be carried out to re-define the impact from consolidation induced by deep excavation in central Jakarta and further discussions will be delivered.
