青岛胶州湾隧道工程全长7 800 m，下穿海域3 950 m。有两条主隧道和一条服务隧道，在青岛端距离洞口2 000 m处设有进出海底隧道的匝道。主隧道海域段线间距约55 m，断面为椭圆形断面，隧道断面宽16 m，高12 m，隧道洞身主要位于微风化花岗岩、辉绿岩、安山岩中，纵断面采用“V”字坡，最大海水深42 m，隧道最小埋深不小于30 m。对钻爆法修建青岛胶州湾海底隧道的关键技术和大型施工机械配套进行了探讨。

Qingdao Jiaozhouwan tunnel is 7 800 m, and subsea tunnel is 3 950 m. There are 2 main traffic tunnels and 1 serving tunnel. Accessorial tunnel passing in or out the main traffic tunnel is founded at 2 000 m part from gate in Qingdao. Space between the center lines of the 2 main traffic subsea tunnesl is 55 m. The section is oblong, width is 16 m, and height is 12 m. The tunnel is through slightly weathering granite, dolerite and andesite. Its vertical section is "V"  slope. The maximum seawater depth is 42 m and the minimal rock cover depth is 30 m.The key tunneling technology and configuring big machines of drilling and blast for constructing Qingdao Jiaozhouwan subsea tunnel were discussed in this thesis.