It is expounded that by adopting the traditional construction methods (such as full face tunnelling method or lower guide-adit method )and allocating national-made machinery may obtain also stable and high-efficient rapid tunnelling speed for construction of railway extra-long single-tracked tunnels.

Initial analysis on application of comprehensive supervision technology of extra-long tunnel in Muzhai ridge

On the thoughts in the extra-long tunnel design in Baotashan

Through the study on the ventilation system of Yangjiao extra-long tunnel,which locates in the west development province road passage from Chongqing to Changsha,connecting Wulong with Shuijiang,especially through the research and analysis on some basic parameter affecting ventilation calculation,the calculation standard of extra-long tunnel is given.

General engineering situation of Wushaoling Super Long Tunnel;

Study on TBM boring technique for construction of super long tunnel;

Firstly,typical natural escape process under four fire scenarios is analyzed according to the fire characteristics of super long tunnel from the viewpoi.

The 25 km long tunnel with the circular cross-section on high-speed railway was constructed by TBM.

Combined with the enginecing case of Jiahuoyan long tunnel, this paper introduces the wateproof principle, the choice of raw material, matching proportion and construction technology of fluid-sprinkle concrete.

In tunneling ventilation of long tunnel,the fan was collocated by the maximum ventilation resistance and the maximum air volume of the whole roadway.

Taking the 6# incline shaft work in Wuqiaoliang Tunnel as example the mating principles of construction machinery for super-long tunnel are analyzed as well as influencing factors.