| 青藏高原大型深层蠕滑型滑坡变形机制研究进展与展望 |
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| 引用本文： | 郭长宝,闫怡秋,张永双,吴瑞安,杨志华,李雪,任三绍,张怡颖,吴中康,刘吉鑫.青藏高原大型深层蠕滑型滑坡变形机制研究进展与展望[J].地球科学,2022,47(10):3677-3700. |
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| 作者姓名： | 郭长宝 闫怡秋 张永双 吴瑞安 杨志华 李雪 任三绍 张怡颖 吴中康 刘吉鑫 |
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| 作者单位： | 1.中国地质科学院地质力学研究所, 北京 100081 |
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| 基金项目： | 国家自然科学基金项目41877279国家自然科学基金项目41731287国家自然科学基金项目41941017国家自然科学基金项目42007280中国地质调查局项目DD20190319中国地质调查局项目DZLXJK202009自然资源部杰出青年科技人才项目12110600000018003911 |
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| 摘 要： | 大型深层蠕滑型滑坡在青藏高原怒江、澜沧江、金沙江、岷江等地形地貌和地质构造复杂区极为发育，具有规模大、滑带深、渐进变形破坏显著等特点，按照滑坡空间结构主要有后缘洼地蠕滑型、顺层基岩蠕滑型和厚层松散堆积物蠕滑型等3种类型，往往表现为长期蠕滑-间歇性复活-整体滑动.通过梳理大型深层蠕滑型滑坡稳定性影响因素、滑带土工程地质力学性质、地下水渗流场特征与降雨诱发滑坡滞后性以及渐进变形破坏机制和动态稳定性等4个方面的研究进展，提出了3个关键科学问题与4个主要研究方向.建议加强深层滑带土在渗流场-应力场等多场耦合作用下的工程地质力学特性研究、加强剖析滑坡岩土体的非均质渗透特性及地下水分布特征分析，研究不同雨强和历时条件下降雨有效入渗机理，研究大型深层蠕滑型滑坡的降水入渗响应过程和降水诱发滑坡变形的滞后性，提出基于渐进变形破坏的滑坡动态稳定性评价方法，为地质灾害早期判识和综合防范提供理论依据.
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| 关 键 词： | 大型深层滑坡 蠕滑 滑带土 渐进变形破坏 动态稳定性 工程地质 |
| 收稿时间： | 2022-05-11 |
Research Progress and Prospect of Failure Mechanism of Large Deep-Seated Creeping Landslides in Tibetan Plateau,China |
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| Abstract: | The large deep-seated landslides are extremely developed in the Tibetan Plateau with extremely complex topography and geological structures, such as the Nujiang River, Lancang River, Jinsha River and Minjiang River.The large deep-seated creeping landslides are characterized with large scale and volume, deep-buried sliding belt, and obvious progressive deformation characteristics, which are often manifested as long-term creeping-intermittent resurrection-overall sliding. According to the spatial structure of landslides, there are mainly three types: the trailing edge-pond creeping landslide, bedding rock creeping landslide, thick layer deposit creeping landslide. In this paper it analyzes the spatial structure and influencing factors of large-scale deep creeping landslides, the engineering geomechanical properties of landslide zone soils, the characteristics of groundwater seepage field and the hysteresis of rainfall-induced landslides, as well as the progressive deformation failure mechanism and dynamic stability. The research progress of large deep-seated creeping landslides has been analyzed, 3 key scientific issues and 4 main research contents are put forward. It is recommended to strengthen the study of deep sliding zone mechanical strength under the multi-field coupling periodic action of the seepage-consolidation-creep-slip, the analysis of the heterogeneous permeability characteristics of landslide rock and soil and groundwater distribution characteristics, the effective rainfall infiltration mechanism and gradual deformation and failure hysteresis law. It is necessary to study and put out a landslide stability evaluation method based on progressive deformation mechanism, which could provide an important theoretical basis for the geo-hazard early identification and comprehensive prevention. |
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