| 川藏铁路通麦至鲁朗段地质构造对滑坡的控制作用分析 |
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| 引用本文： | 张佳佳,王军朝,朱德明,李 勇.川藏铁路通麦至鲁朗段地质构造对滑坡的控制作用分析[J].高校地质学报,2022,28(6):911-919. |
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| 作者姓名： | 张佳佳 王军朝 朱德明 李 勇 |
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| 作者单位： | 1. 成都理工大学 地球科学学院，成都 610059；
2. 中国地质科学院 探矿工艺研究所，成都 611734；
3. 西藏自治区地质矿产勘查开发局第二地质大队，拉萨 85000；
4. 成都理工大学 地球物理学院，成都 610059 |
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| 摘 要： | 藏东南的喜马拉雅东构造结地区作为青藏高原隆升最快的地区之一，复杂的地质背景条件决定了该区工程地质问题的复杂性和特殊性，并孕育了多种地质灾害。文章通过遥感解译、无人机测绘以及野外现场调查，详细分析了喜马拉雅东构造结北西侧通麦至鲁朗段已有滑坡的发育特征，总结了地质构造对滑坡的控制作用，结果表明：（1）构造演化形成的高陡斜坡为滑坡形成提供地形条件，滑坡后缘的断裂破碎带，为雨水入渗提供通道，形成滑坡边界；（2）斜坡岩体中发育的贯通性构造节理为滑坡提供滑动条件和物质基础；（3）地震震动对岩体结构造成直接破坏，并诱发同震滑坡。多种构造作用的耦合造成了川藏铁路通麦至鲁朗段滑坡的高易发性，相关结果可为铁路修建过程的边坡灾害管控提供参考和支撑。
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| 关 键 词： | 断裂 地震 构造地貌 滑坡 川藏铁路 |
Research on the Controlling Effect of Tectonic Action on Landslidesalong Lulang-Tongmai Section of Sichuan-Tibet Railway |
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| ZHANG Jiajia,WANG Junchao,ZHU Deming,LI Yong.Research on the Controlling Effect of Tectonic Action on Landslidesalong Lulang-Tongmai Section of Sichuan-Tibet Railway[J].Geological Journal of China Universities,2022,28(6):911-919. |
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| Authors: | ZHANG Jiajia WANG Junchao ZHU Deming LI Yong |
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| Institution: | 1. School of Earth Science, Chengdu University of Technology, Chengdu 610059, China;
2. Institute of Exploration Technology, CAGS, Chengdu 611734, China;
3. The Second Geological Brigade, Bureau of Geological and Mineral Exploration and Development of Tibet Autonomous Region, Lhasa 85000, China;
4. School of Geophysics, Chengdu University of Technology, Chengdu 610059 , China; |
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| Abstract: | In eastern Himalayan Syntaxis of southeastern Tibet, one of the fastest uplifting region, complex geological environment determines the particularity and complexity of engineering geological problems, giving birth to a variety of geohazards. Based on the remote sensing interpretation, unmanned aerial vehicle mapping and field investigation, the controlling effects of tectonic action on landslides are summarized. Firstly, the steep slope formed by structural evolution provides topographic conditions for the formation of landslides, and the resulting fault damage zone at the back edge of the slope provides a channel for rainwater infiltration and hence the formation of landslide boundary. Secondly, the penetrating tectonic joints developed in bedrock provide sliding conditions and material basis for landslides. Thirdly, seismic vibration causes direct damage to bedrock and induces co-seismic landslides. A combination of faults, frequent earthquakes, tectonic landform and joints in the Lulang-Tongmai railway section from Sichuan to Tibet increases the possibility of the outbreak high-locality landslides in the future. The results provide insights in the slop hazard management during the railway construction. |
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| Keywords: | fault earthquake tectonic landform large landslide Sichuan-Tibet Railway |
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