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1.水毁灾害的危害长距离输气管道敷设长度经常几百上千公里,沿线地形地貌、地质条件、水文气象条件千变万化,河流纵横,加之管道建设条件复杂,工程施工不可避免地会大面积扰动地表,改变原始环境的稳定性。因此管道经常因溪流和洪水冲击、坡体滑动、冲沟、河床下切、河流改道而导致管道受力、整体变形、失稳、悬空甚至裸露,这些管道灾害统称为水毁灾害。我国最大的“西气东输”管道工程,长度4200公里,一、二线工
1. Damage caused by disasters disaster Long-distance gas pipeline laying hundreds of thousands of kilometers often along the topography, geological conditions, ever-changing hydrological and meteorological conditions, vertical and horizontal rivers, coupled with complex pipeline construction conditions, the construction will inevitably be a large area Disturb the surface, changing the stability of the original environment. As a result, pipelines often experience stress, deformation, instability, vacancy or even bareness due to impact of streams and floods, sliding of sloping bodies, gullys, undercutting of rivers and diversion of rivers. These pipeline hazards are collectively referred to as water damage disasters. China’s largest “West-East Gas Pipeline” pipeline project, a length of 4200 km, a second-line workers