Another Railway In YunNan Has Made New Progress
Recently, the longest tunnel of daling railway, the linbaoshan tunnel no. 1 to no. 2 inclined shaft zhengdong section, was successfully completed, marking a breakthrough in the key and difficult control engineering construction of dalingrailway and laying a foundation for the completion and opening of the whole line as scheduled.
Linbaoshan tunnel is located in weishan county, Dali bai autonomous prefecture, yunnan province, with a total length of 14.076 kilometers. It is a high-risk tunnel, covering karst, harmful gas, fault fracture zone, high in-situ stress, high in-situ temperature and other adverse geology.
In order to improve the construction environment, the construction unit adopts the portable intelligent thermometer in the tunnel to detect the tunnel ground temperature and ring temperature in real time, places the sprinkler system near each working face, places the ice cube, strengthens the ventilation, reduces the temperature, improves the construction personnel and mechanical operation efficiency, and speeds up the tunneling speed.
At present, the construction of Lin baoshan tunnel is progressing smoothly. The main tunnel has been excavated for 11,249 meters and the auxiliary tunnel for 6,922 meters.