摘要
基于详细的野外调查,对汶川县雁门乡雁洛村发育的大型堆积体的基本特征、形成及演化过程进行较深入研究,结果表明:雁洛堆积体为残坡积、崩坡积、类黄土堆积以及滑坡堆积等4部分组成的复合堆积,平面上可分2个大区、6个次级区;结合侧缘基岩变形迹象以及UDEC数值模拟对滑坡的形成机制进行分析,其变形破坏模式为弯曲-拉裂模式;雁洛堆积体演化经历早更新世宽谷期黄土堆积阶段,中、晚更新世峡谷期谷坡卸荷变形阶段,峡谷区滑坡形成阶段,全新世堆积体复活变形阶段等4个阶段。
The basic characteristics,formation,and evolution process of the large-scale accumulations developed in Yanluo Village,Yanmen Township,Wenchuan County are studied based on detail field investigations.The results show that:Yanluo deposit is a complex origin deposit that made up of residual and slope deposit,colluvium,loess-like and landslide deposit,and it can be divided into two zones and six sub-zones;the failure modes of the evolution process of Yanluo deposit are " bend-crack" which is simulated by UDEC software;The 4 evolution phases of Yanluo deposit may be summarized as loess accumulation stage in early Pleistocene,unloading and deformation stage in middle-late Pleistocene,landslide formation stage,deposit reactivated and deformation stage in Holocene,respectively.
作者
冯倩倩
王运生
罗越
刘江伟
明伟庭
郭凤双
FENG Qianqian;WANG Yunsheng;LUO Yue;LIU Jiangwei;MING Weiting;GUO Fengshuang(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China;Department of Management and Engineering,Sichuan Aerospace Polytechnic,Guanghan618300,China)
出处
《南水北调与水利科技（中英文）》
CAS
北大核心
2020年第4期141-148,共8页
South-to-North Water Transfers and Water Science & Technology
基金
国家重点研发计划(2017YFC1501000)
国家自然科学基金(41877235)
国家创新研究群体科学基金(41521002)
地质灾害防治与地质环境保护国家重点实验室自主课题基金(SKLGP2015Z001)。
关键词
雁洛堆积体
物质组成
成因
倾倒变形
演化过程
Yanluo giant deposit
deposit composition
mechanism
toppling deformation
evolution process
