New ventilation and smoke exhaust and dust removal technology in long tunnel construction;

Study on economical efficiency of rail transport scheme in long tunnel;

Quality control of pump concrete of long tunnel lining;

Study on the construction technology of unballasted track of long and large tunnel

Research purposes:In modern railway and highway construction,it appears lots of long and large tunnels.

Taking Baima Extra-long Tunnel as the Example,this paper introduces the construction measurement technology of long and large tunnel from four aspects.

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.

Based on engineering geological feature of tunnel setting,a finite element of entrance of Changchong tunnel is established,which can simulate the construction process under the bench method and CD method.