中俄东线岛状多年冻土现状及退化原因

发布时间：2018-04-18 08:19

本文选题：中俄东线 + 岛状多年冻土　；参考：《油气储运》2017年12期

【摘要】：多年冻土产生的冻胀和融沉可能导致管道变形破坏,探明中俄东线天然气管道岛状多年冻土的现状和退化原因非常必要。采用工程地质钻探、地温测试及高密度电法的综合勘察方法,对管道沿线16处疑似岛状多年冻土区进行勘察验证;通过搜集管道沿线气候和森林覆盖率等资料,分析近年来研究区域内各要素变化趋势,推测其对冻土环境的影响。研究表明:由于全球气候转暖及人为活动频繁等诸多因素,导致东北地区气温升高、森林覆盖率减少、湿地消失,冻土环境失去了原有的热平衡,造成管道沿线岛状多年冻土区显著退化;与此同时,20世纪70年代划定的东北地区多年冻土南界呈现明显北移的趋势。
[Abstract]:The frost heaving and thawing caused by permafrost may lead to pipeline deformation and destruction. It is necessary to find out the present situation and degradation reasons of the island permafrost along the East Russia natural gas pipeline.In this paper, 16 suspected island permafrost areas along the pipeline are surveyed and verified by engineering geological drilling, ground temperature test and high density electrical method, and the data of climate and forest coverage along the pipeline are collected.This paper analyzes the variation trend of various elements in the study area in recent years, and infer its influence on the frozen soil environment.The results show that due to many factors, such as global warming and frequent human activities, the temperature in Northeast China has increased, forest coverage has decreased, wetlands have disappeared, and the permafrost environment has lost its original heat balance.At the same time, the southern boundary of permafrost in Northeast China is obviously moving northward in the 1970s.
【作者单位】：中国石油管道局工程有限公司设计分公司;
【基金】：中国石油管道局工程有限公司科研课题“中俄原油管道二线多年冻土区管道设计应用技术研究”,GK14-13-A
【分类号】：P642.14

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