在建的大连湾海底隧道、大连地铁一号、二号线均是典型地下工程项目，大连地质勘察结果显示，上述工程均通过石灰岩岩层。
Subsea tunnel in Dalian Bay , metro Line 1 and 2 in Dalian City are being built now , all these are typical underground engineering items , geologic survey results show that , projects above all go through limestone rock formation .
大连湾海底隧道