本项目结合国际上冻土研究的热点问题、冻土工程研究的难点问题和国家重大工程需求，通过精细尺度、局域尺度和区域尺度不同地貌单元、不同生态系统下冻土水热状态定位监测、地表和路基变形遥感监测和高精度GPS定位监测、多通道雷达反演活动层厚度、地下冰含量和水热变化研究，建立精细尺度上冻土与气候变化、工程活动和生态环境变化之间相互作用的数值分析模型和局域、区域冻土工程地质过程评价模型，研究气候、生态环境变化和人类工程活动对自然和路基下部冻土变化的叠加影响，模拟气候变化下多年冻土和地表变形的变化趋势及其对路基稳定性的影响。阐明多年冻土热力稳定性对气候和生态环境变化、工程活动的响应过程和机理，揭示气候变化和工程作用对路基下部多年冻土影响的快慢过程的耦合效应，提出冻土工程考虑气候变化的工程设计原则和寒区生态环境保护对策，为寒区重大工程建设提供科学支撑。

Based in focus problems of international permafrost research, difficult problems of permafrost engineering and national requirements of key engineering in cold regions, observation in heat and moisture of frozen soil, remote sensing and GPS monitoring of surface and embankment deformation, active layer thickness, multi-channel Geo-radar inversion of ground ice content and heat-moisture change in different ecological system of different topographical unit are studied by fine section scale, local scale and regional scale. Fine section scale numerical model of interaction among permafrost, climate change, ecological environment and engineering actions and local and regional scale evaluation model of frozen soil engineering geology are built to study superposed impact of climate change, ecological environment and engineering activities on permafrost change beneath embankment and natural surface and simulate change trend of permafrost and surface deformation and its impact on embankment stability under the effect of climate change and engineering action. Clearly explaining the response process and mechanism of permafrost thermal-mechanical stability to climate change and ecological environment and engineering activities are clear explained and the coupling effect of quick and slow process in the impact of climate change and engineering activities on permafrost and proposing engineering design principle of considering climate change in permafrost engineering and ecological environment protection of key engineering in cold regions can provide some scientific supports for the key engineering construction in cold regions.