Abstract:

The subsea tunnels located at Jiaozhou Bay in Qingdao is presented in this paper. Twodimensional numerical simulation of two schemes is performed using flac3D. The displacements at the key points in the tunnel and the plastic zones in the soil are analyzed to study the effects on the stability of surrounding ground induced by the constructions of parallel adjacent subsea tunnels. And some conclusions and suggestions which can help design and construction are given finally.

Key words: parallel adjacent subsea tunnels service tunnel interaction displacement at key point , plastic zone