中缅天然气管线沿线滑坡变形监测与机理分析——以黔西南州沙子镇滑坡为例

中缅天然气管线黔西晴隆段沙子镇2016年和2017年连续2次因滑坡引发天然气管线破裂事件,引起了人们的极大关注。滑坡的变形机制和监测对该区的天然气管线的正常运营具有非常重要的意义。在研究区域构造背景的基础上,根据该区地质、构造特征和现场收集的滑坡变形资料及监测数据,开展了该区段变形机制的研究和变形监测分析。研究结果表明:滑坡变形主要划分为管线正常运行阶段的坡体未变形、缓慢蠕滑变形、加速蠕滑变形和管线破裂变形4个阶段。滑坡主要是由于人工堆填土方所引起的蠕滑变形所致。监测数据表明:通过抗滑处理后,坡体的变形得到了有效控制,天然气管线运行较为安全,但仍需要进一步的监测和预报。

Deformation monitoring and mechanism analysis on landslide along China-Myanmar Natural Gas Pipeline: case of Shazi Town Landslide in west of Guizhou Province

Two natural gas pipeline exploding events, China-Myanmar Natural Gas Pipeline, induced by landslide happened in Shazhi town of Qinglong section(west of Guizhou province) in 2016 and 2017, which has attracted great attention. Landslides deformation monitoring and mechanism analysis are of great significance to the normal operation of natural gas pipeline in this area. According to the regional geological structure and the landslide deformation data collected in the field, the landslide deformation mechanism was studied. The results show that the landslide deformation was mainly divided into four stages: no deformation, slow creep deformation, accelerated creep deformation and collapsed leading to pipeline rupture. The landslide was mainly due to the creep deformation caused by the artificial landfill. The current monitoring data show that after anti-sliding treatment, the deformation of the landslide has been effectively controlled, and the natural gas pipeline is safe, but further monitoring and forecasting are still needed.