研究输气管道小断面隧道的地震动力响应有着重要的工程应用价值。

To study seismic dynamic response of gas pipeline small cross-section tunnel has important value of engineering application.

youdao

随着隧道施工机械化程度的提高，在特长小断面隧道工程中采用钻爆法掘进施工，其机械配套是制约掘进速度的重要条件。

With the development of mechanization and drill and blast in extra - long tunnels with a small section, the matching machinery is very important to driving speed.

youdao