The Laohugou Tunnel is located in Huangyuan County, Xining City, Qinghai Province, with an average altitude of 3,100 meters. Due to the large temperature difference between day and night, the leaking groundwater easily freezes icicles and ice cones in the tunnel every winter. If

Laohugou Tunnel is located in Huangyuan County, Xining City, Qinghai Province, with an average altitude of 3,100 meters. Due to the large temperature difference between day and night, leaking groundwater easily freezes icicles and ice cones in the tunnel every winter. If it is not cleaned in time, it will affect driving safety. Lay hidden. In order to ensure safe driving during the Spring Festival travel period, employees in the Huangyuan Bridge and Tunnel Workshop of the Xining Works Section of China Railway Qinghai-Tibet Group Co., Ltd. have increased the frequency of inspections and carried out timely de-icing work to protect the safety of Qinghai-Tibet Railway equipment.

html On February 6, employees in the Huangyuan Bridge and Tunnel Workshop of the Xining Public Works Section of China Railway Qinghai-Tibet Group Co., Ltd. arranged tasks before carrying out deicing work. Photo by Xinhua News Agency reporter Wang Wei

html On February 6, employees of the Huangyuan Bridge and Tunnel Workshop of the Xining Works Section of China Railway Qinghai-Tibet Group Co., Ltd. were carrying out deicing work in the Laohugou Tunnel. Photo by Xinhua News Agency reporter Zhang Long

html On February 6, employees of the Huangyuan Bridge and Tunnel Workshop of the Xining Works Section of China Railway Qinghai-Tibet Group Co., Ltd. were carrying out deicing work in the Laohugou Tunnel. Photo by Xinhua News Agency reporter Zhang Long

html On February 6, employees of the Huangyuan Bridge and Tunnel Workshop of the Xining Works Section of China Railway Qinghai-Tibet Group Co., Ltd. were carrying out deicing work in the Laohugou Tunnel. Photo by Xinhua News Agency reporter Zhang Long

html On February 6, employees of the Huangyuan Bridge and Tunnel Workshop of the Xining Works Section of China Railway Qinghai-Tibet Group Co., Ltd. were carrying out deicing work in the Laohugou Tunnel. Photo by Xinhua News Agency reporter Zhang Long

html On February 6, employees of the Huangyuan Bridge and Tunnel Workshop of the Xining Works Section of China Railway Qinghai-Tibet Group Co., Ltd. inspected the vault of Laohugou Tunnel. Photo by Xinhua News Agency reporter Zhang Long

html On February 6, employees of the Huangyuan Bridge and Tunnel Workshop of the Xining Works Section of China Railway Qinghai-Tibet Group Co., Ltd. inspected the vault of Laohugou Tunnel. Photo by Xinhua News Agency reporter Zhang Long