For investigating the air pollution in doubleline railway tunnel by electric traction, we tested the air condition in Jundushan tunnel.
为了解电力牵引的双线铁路运营隧道空气污染状况，选择军都山隧道进行现场测试。
2
In general, as the distance between doublelinetunnel and existing tunnel is very small, excavating blast in doublelinetunnel will affect structure safety of existing tunnel.
复线隧道与既有隧道的净间距一般都较小，因此，施工爆破对既有隧道会有较大的影响。
3
A description is given to method and technology adopted against track deviation during construction of elastic monolithic track bed in long doublelinetunnel.