摘要
古滑坡是斜坡长期复杂演化过程的产物,物质组成复杂、岩土力学性质特殊,具有极强的隐蔽性和扰动敏感性。随着人类工程活动不断加剧和极端天气频繁出现,国内外发生了大量古滑坡复活导致的交通、水电工程等重要设施毁坏和人员伤亡等灾难性事件,灾害风险日益严峻。通过梳理国内外古滑坡研究现状,总结了古滑坡区域发育规律及古滑坡判识研究、古滑坡体和古滑带的物理力学性质研究、古滑坡的复活机理研究、古滑坡复活过程及其模拟分析、古滑坡复活的早期识别研究等方面的主要进展。结合当前防灾减灾需求,提出古滑坡复活问题研究的3个关键科学问题是:(1)古滑坡自动化判识方法和准则;(2)基于新强度理论的古滑坡复活起滑机理;(3)古滑坡复活的早期识别模型和评价方法。破解这些关键科学问题,将为重大工程规划和防灾减灾提供新的理论和技术支撑。
The ancient landslide has endured long-term slope evolution which results in its complicated materi- al and special rock-soil properties. The risk of ancient landslide reactivation is substantially increasing due to the in- crease of intensified human engineering activities and the frequency of extreme weather events. Many ancient land- slides have been reactivated all over the world and led to serious fatalities and severe damage to many important en- gineering facilities such as transportation and hydropower engineering projects. On the basis of the analysis of the re- search situation about the ancient landslides at home and abroad, the main research advances were summarized in- cluding the regional developing laws and recognizing of the ancient landslides, the mechanics properties of ancient landslide body and related sliding zone, reactivation mechanism of ancient landslides, reactivating process and modeling analysis of ancient landslides, early recognization of ancient landslide reactivation, etc. To meet the de- mands of disaster prevention and reduction, three key scientific issues were put forward to be solved： ①automati- caly establishing the methodology and identification criterions for recognition of ancient landslide; ②revealing the reactivation mechanism of ancient landslide based on a new strength theory; ③establishing the early rapid recogni- tion method and predictive model for ancient landslide reactivation. Solving the above mentioned scientific theory and methodology will facilitate the planning and site selection of major projects as well as the disaster prevention and reduction in ancient landslide developing areas.
作者
张永双
吴瑞安
郭长宝
王立朝
姚鑫
杨志华
Zhang Yongshuang;Wu Ruian;Guo Changbao;Wang Lichao;Yao Xin;Yang Zhihua(Tianfin Center,China Geological Survey,Tianjin 300170,China;China Institute of Geo-Environment Monitoring,Beijing 100081,China;Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081)
出处
《地球科学进展》
CAS
CSCD
北大核心
2018年第7期728-740,共13页
Advances in Earth Science
基金
国家自然科学基金重点项目"青藏高原东缘古滑坡复活机理与早期识别研究"(编号:41731287)资助~~
关键词
古滑坡
混杂堆积体
强度理论
复活机理
早期识别
Ancient landslide
Composite deposit
Strength theory
Reactivation mechanism
Early recognition.
