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Progressing Rate of Ba-Guah-Shan Gravel Tunnel Construction
This study analyzed the construction of the Ba-Guah-Shan Tunnel (length about 5km, excavated diameter about 12m) and the effects of gravel formations. Monthly excavation rate and each construction cycle time were synthesized. The data for different construction faces and sections of geological classifications were compared and analyzed. The excavation progress in gravel formations was found to be greatly affected by the groundwater. Thus, tunneling advance rate was calculated separately for portal, dry and seepage sections. The overall advance rate was 9 to 15 hr/m. In the dry section, the advance rate reached 60 m or more per month. However, tunnel construction in other sections, i.e., seepage or water inrush sections, had substantially lower advance rates. For lowering the water table, the vacuum method was more effective than the gravity method.
Progressing Rate of Ba-Guah-Shan Gravel Tunnel Construction
This study analyzed the construction of the Ba-Guah-Shan Tunnel (length about 5km, excavated diameter about 12m) and the effects of gravel formations. Monthly excavation rate and each construction cycle time were synthesized. The data for different construction faces and sections of geological classifications were compared and analyzed. The excavation progress in gravel formations was found to be greatly affected by the groundwater. Thus, tunneling advance rate was calculated separately for portal, dry and seepage sections. The overall advance rate was 9 to 15 hr/m. In the dry section, the advance rate reached 60 m or more per month. However, tunnel construction in other sections, i.e., seepage or water inrush sections, had substantially lower advance rates. For lowering the water table, the vacuum method was more effective than the gravity method.
Progressing Rate of Ba-Guah-Shan Gravel Tunnel Construction
Hsu, Sung-Chi (author) / Huang, Wei-Ming (author) / Yang, Ming-Der (author)
GeoHunan International Conference 2011 ; 2011 ; Hunan, China
2011-05-16
Conference paper
Electronic Resource
English
Construction , Geomaterials , Case studies , Gravel , Pavements , Tunnels
Progressing Rate of Ba-Guah-Shan Gravel Tunnel Construction
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