Influence of earth pressure coefficient at rest for overconsolidated soils subjected to shallow overburden tunneling

摘要

It can be concluded that impact of variation in K0 is very high in terms of GRC and stress path. In case of K0=0.5 and 1.5the behavior became reverse as yielding initiation point switches from the crown to spring line respectively. Whilst for thecase of K0=1.0, the behavior at the crown and spring line is approximately the same as yielding initiates at the crown andspring line at the same relaxation approximately. So it is important to check the design sensitivity by varying the K0 value.