Distribution characteristics and risk assessment of water damage disaster in Linqu section of Tai-Qing-Wei natural gas pipeline
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摘要: 对泰青威天然气管道临朐段地质灾害发育特征进行调查研究发现,临朐段地质灾害类型主要为水毁灾害,具体可分为坡面水毁、河沟道水毁和台田地水毁。野外地质灾害实地调查临朐段管道沿线共发现地质灾害15处,其中坡面水毁点6处,河沟道水毁点4处,台田地水毁点5处。采用定性与半定量相结合的评价方法对其进行地质灾害风险评价,结果表明: 地质灾害风险等级较高的有1处,占6.66%; 风险等级中等的有4处,占26.67%; 风险等级较低的有10处,占66.67%。根据管道沿线地形地貌、地质灾害发育密度、风险等级等因素,划分地质灾害中易发区61 km,低易发区10 km,管道沿线以地质灾害中易发区为主。最后,针对不同类型、不同风险等级地质灾害提出了相应的防治消减措施,为后期管道安全运营和风险整治决策提供了有效的技术依据。Abstract: Based on the investigation and study on the development characteristics of geological disasters in Linqu section of Tai-Qing-Wei natural gas pipeline, the authors in this paper have identified the major type of geological disasters in Linqu section, which is water damage disaster. And it can be divided into three types: slope surface water damage, channel water damage and platform field water damage. During the field investigation of geological disasters, 15 geological disasters were found along the pipeline in Linqu section, including 6 water damage points of slope surface, 4 water damage points of channel and 5 water damage points of platform field. The risk of geological disasters was evaluated by the qualitative and semi-quantitative methods. The results show that there is one section with medium high risk level, accounting for 6.66% and four sections with medium risk level, accounting for 26.67%, ten sections with medium low risk level, accounting for 66.67%. According to the landform, development density and risk level of geological disasters along the pipeline, the medium and low risk areas are 61 km and 10 km respectively, and along the pipeline, there are mainly medium risk areas. According to the different types and risk levels of geological disasters, the corresponding prevention and reduction measures are put forward, which provides an effective technical basis for the safe operation of the pipeline and risk management decision-making about it.
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