中缅油气管道沿线地质灾害分析与防治

Analysis and prevention of geological hazards along the China-Myanmar Oil and Gas Pipeline

中缅油气管道(缅甸段)地质条件复杂,管道穿越若开山区和缅北高原,由于建设期大面积扰动地表,改变了原始地貌,铺设管道后重新回填的土体力学强度低、水敏感性强,受汛期强降雨和洪水的影响,管道沿线出现了大量滑坡、河沟道水毁、坡面水毁、已建水工失效等地质灾害,导致多处露管、悬管,严重威胁了管道的安全运营。重点分析了沿线地质灾害的类型、成因及结构特征,并分别对若开山区和缅北高原的地质灾害提出了防治措施,以期对类似工程提供参考和借鉴。

The geological conditions along the China-Myanmar Oil and Gas Pipeline(Myanmar section) are complex, and this pipeline crosses the Ruokai Mountains and the North Myanmar Plateau. The surface is disturbed in the large area and the original landform is changed during the construction period. And the re-filled soil after pipeline laying has low mechanical strength and strong water sensitivity. Therefore, due to the effects of heavy rainfall and floods during the flood season, a great number of geological hazards occur along the pipeline, e.g. landslides, water damage to river channels, water damage on slopes and failure of existing hydraulic projects, resulting in pipeline exposure and suspension in many positions, which seriously threaten the operation safety of the pipeline. In this paper, the types, causes and structural characteristics of the geological disasters along the pipeline were mainly analyzed, and the measures for the prevention of geological hazards in the Ruokai Mountains and the North Myanmar Plateau were proposed respectively, so as to provide reference for similar projects.