Get on the tram and drive into the dim tunnel from the entrance of the cave, banging and swaying... An hour and a half later, I finally arrived at the excavation surface where the machine roared, hot and humid... The reporter visited the construction site on November 3 The Xiuling Tunnel of the Da (Li)-Swiss (Li) Railway of the Myanmar International Corridor.
The Xiuling Tunnel is located in Yangbi County, Dali Prefecture, Yunnan Province, with a total length of 17.623 kilometers. It is a long tunnel construction project.
In the construction of long and large tunnels, there are generally several auxiliary tunnels such as horizontal tunnels and inclined shafts opened on both sides of the tunnel’s main tunnel line, which can increase the excavation work surface, facilitate the entry and exit of personnel and materials, and ventilate heat to achieve "long "Tunnel short hit" effect.
"People-oriented" is the fundamental requirement. In order to ensure the construction environment in the tunnel, the construction unit opened a horizontal guide (parallel guide hole of the tunnel's main tunnel), and used tram transportation to organize the construction. "The big loop mode.
On average, every 6 to 7 minutes, there is a train entering the tunnel to organize and dispatch. Outside the Xiuling Tunnel, there is a charging system, a maintenance system, and a command and dispatch system, just like a "small railway bureau."
At present, the horizontal guide of the entrance of the Xiuling Tunnel has been successfully excavated to 9.5026 kilometers. This excavation length has created a new Asian construction record for the independent excavation of a railway mountain tunnel.
(Reporter Miao Chao edited Wu Rui)
Editor in charge: [Liu Xian]