漠河-加格达奇段多年冻土区中俄原油管道运营以来的次生地质灾害研究——以MDX364处的季节性冻胀丘为例

发布时间：2018-06-06 15:12

本文选题：多年冻土 + 中俄原油管道　；参考：《冰川冻土》2015年03期

【摘要】：通过对中俄原油管道漠河-加格达奇段多年冻土区的现场勘查研究,统计了管道运营以来出现的冻土次生地质灾害主要有冻胀、融沉、水毁、冻胀丘、冰椎等.在研究区域特定的气候背景下,管道的修建和季节性变化的正油温运营,破坏了管道周围冻土的水热平衡,使得管道周围土体出现差异性冻胀和融沉,这种差异性位移量的累积对管道安全稳定长期运营造成了威胁.以管道里程MDX364处的冻胀丘为例,利用探地雷达进行了现场探测.结果表明:管道周围存在的融区为冻胀丘的发生和发展提供了水源补给通道,管道的热影响加速了冻胀丘的发展和消融,2014年3-10月管道周围地表产生的差异性位移超过了1.1 m.针对该次生开放型季节冻胀丘,提出了修筑或疏通管道附近的排水通道、钻孔放水和保温排水渗沟等防治措施.研究成果能为中俄原油管道的安全稳定运营提供技术支撑,为其他冻土区管道设计施工和运营维护提供参考和依据.
[Abstract]:Based on the field investigation and study on the permafrost region of Mohe-Gagdachi section of the Sino-Russian crude oil pipeline, the secondary geological hazards of permafrost that have occurred since the pipeline operation are mainly frost heaving, thawing subsidence, water destruction, frost heaving mound, ice vertebrae and so on. Under the specific climatic background of the study area, the construction of pipeline and the operation of seasonal variation of the normal oil temperature destroy the water and heat balance of the frozen soil around the pipeline, and make the soil around the pipeline appear different frost heaving and thawing settlement. The accumulation of this differential displacement poses a threat to the long-term operation of pipeline safety and stability. Taking the frost heaving mound at MDX364 of pipeline mileage as an example, ground penetrating radar is used to detect the site. The results show that the thawing zone around the pipeline provides a water supply channel for the occurrence and development of the frost heaving hill, and the thermal influence of the pipeline accelerates the development and ablation of the frost heaving hill, and the difference displacement of the surface around the pipeline from March to October 2014 exceeds 1.1 m. In view of the secondary open seasonal frost heaving mound, the prevention and cure measures such as constructing or dredging the drainage channel near the pipeline, drilling and discharging water and heat preservation drainage seepage ditch are put forward. The research results can provide technical support for the safe and stable operation of Sino-Russian crude oil pipelines, and provide reference and basis for the design, construction, operation and maintenance of pipelines in other frozen soil regions.
【作者单位】：中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室;中国科学院大学资源与环境学院;
【基金】：国家自然科学基金项目(41171055) 冻土工程国家重点实验室自主课题(SKLFSE-ZY-11)资助
【分类号】：TE973;P642.14

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