The Determination of Pipeline Crossing Scheme in Laodaohe River of ZHongxian-Wuhan Gas Transmission Pipeline

The determination of pipeline crossing scheme in large-scale rivers is influenced by geological conditions, hydrologic conditions, formation, environment and flood. Take the hydrologic and geological characteristics of Laodaohe River in Hunan Province into account, some crossing schemes such as truss overhead crossing, push bench process and drilling & exloding tunelling method are analyzed and compared. On the basis of optimization, the drilling & exploding tunnelling scheme is available.