| 川藏交通廊道典型高位滑坡地质力学模式 |
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| 引用本文： | 张永双,杜国梁,郭长宝,李向全,任三绍,吴瑞安.川藏交通廊道典型高位滑坡地质力学模式[J].地质学报,2021,95(3):605-617. |
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| 作者姓名： | 张永双 杜国梁 郭长宝 李向全 任三绍 吴瑞安 |
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| 作者单位： | 中国地质科学院水文地质环境地质研究所,石家庄,050061;中国地质调查局第四纪年代学与水文环境演变重点实验室,石家庄,050061;河北地质大学,石家庄,050031;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： | 本文为国家自然科学基金项目（编号41941017、41807231、41731287），国家地质调查项目（编号20190505）资助的成果。 |
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| 摘 要： | 川藏交通廊道穿越青藏高原东缘高山峡谷区,大型—巨型高位滑坡多发频发,是铁路、高速公路等交通设施规划建设必须考虑的重要因素。在区域成灾地质背景分析和现场调查的基础上,以地貌特征、斜坡岩体结构、促发条件等为基本要素,总结归纳了川藏交通廊道典型高位滑坡的6类地质力学模式,包括:堆积体滑移型、顺层滑移拉裂型、卸荷剪断型、岩溶贯通拉裂型、崩滑溃散型和构造控制型等。结合典型高位滑坡案例,重点剖析了各类滑坡启动的简化力学机制,并给出了相应的成因解析。综合考虑不同类型高位滑坡的控制因素和易发性分区结果,初步圈定了川藏铁路雅安—林芝段高位滑坡易发靶区,对高位滑坡隐患早期识别、重大工程选址选线和防灾减灾具有重要的指导作用。
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| 关 键 词： | 高位滑坡 地质力学模式 锁固段 内外动力耦合作用 高原峡谷区 |
| 收稿时间： | 2021/2/14 0:00:00 |
| 修稿时间： | 2021/3/11 0:00:00 |
Research on typical geomechanical model of high- position landslides on the Sichuan- Tibet traffic corridor |
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| ZHANG Yongshuang,DU Guoliang,GUO Changbao,LI Xiangquan,REN Sanshao,WU Ruian.Research on typical geomechanical model of high- position landslides on the Sichuan- Tibet traffic corridor[J].Acta Geologica Sinica,2021,95(3):605-617. |
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| Authors: | ZHANG Yongshuang DU Guoliang GUO Changbao LI Xiangquan REN Sanshao WU Ruian |
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| Institution: | (Intitute of Hydrogeelegy and Environmental Geology,Chinese Academy of Geosciences,Shijiazhuang,050061;Key Laboratory of Quaternary Chronology and Hydro Environmental Exolution.China Geological Survey,Shijiazhuang,050061;Hebei University of Geosciences,Shijiazhuang,050031;Institute of Geomechanics,Chimese Academy of Geological Sciences,Beijing,100081) |
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| Abstract: | The Sichuan-Tibet traffic corridor passes through the plateau canyon area on the eastern margin of Tibet Plateau, and large-giant high-position landslides occur frequently, which is an important factor that must be considered in the planning and construction of transportation such as railways and expressways. Based on the analysis of regional geological background and field investigation, taking the geomorphic characteristics, slope rock mass structure and triggering conditions as the basic elements, six geo-mechanical models of typical high-position landslides on the Sichuan-Tibet traffic corridor are summarized, including accumulation sliding type, bedding sliding-tension cracking type, unloading shear type, karst transfixion-tension cracking type, collapse diffuse type and structural control type. Combined with the typical cases of high-position landslide, the initiation mechanism of various landslides is studied, and the corresponding cause analysis is given. Considering the control factors and susceptibility zoning results of landslides, the prone target area of different high-position landslides along Ya’an-Linzhi segment on the Sichuan-Tibet traffic corridor is preliminarily delineated, which has an important guiding significance for early identification of high-position landslides, site selection of major projects and disaster prevention and mitigation of major projects. |
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| Keywords: | high- position landslide geo- mechanical model locked patch internal and external dynamic coupling plateau canyon |
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