舟曲泄流坡滑坡变形特征及其形成机理

黄晓; 杨为民; 张春山; 申俊峰; 刘廷

舟曲泄流坡滑坡变形特征及其形成机理

黄晓^{1, 2,},
杨为民¹,
张春山¹,
申俊峰²,
刘廷^{1, 2}

1.
中国地质科学院地质力学研究所, 北京 100081
2.
中国地质大学(北京)地球科学与资源学院, 北京 100083

基金项目:

国家科技支撑项目 2011BAK12B09

地质调查工作项目 1212011120072

国家自然科学基金项目 41072269

详细信息

作者简介:
黄晓(1989-), 女, 硕士生, 主要研究方向为地质灾害和活动构造。E-mail:xhuangchn@163.com

中图分类号: P642.22
计量
- 文章访问数: 236
- HTML全文浏览量: 102
- PDF下载量: 23
- 被引次数: 0
出版历程
- 收稿日期: 2013-01-28
- 刊出日期: 2013-06-01

DEFORMATION CHARACTERISTICS AND FORMATION MECHANISM OF XIELIUPO LANDSLIDE IN ZHOUQU

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
School of Geosciences and Resources, China University of Geosciences, Beijing 100083, China

摘要

摘要: 以甘肃舟曲泄流坡滑坡的野外详细调查和变形监测资料为基础，探讨泄流坡滑坡蠕滑变形特征和形成机理。研究表明，舟曲泄流坡滑坡发育于坪定-化马断裂内，属典型的巨型断裂带滑坡。该滑坡由多个次级滑坡组成，表现为蠕滑变形特点，且一直处于不稳定状态。该滑坡是在内外动力耦合作用下形成的，断裂破碎带是泄流坡滑坡发生的充分条件，断裂活动导致坡体发生塑性流动变形；而降雨是滑坡发生大规模下滑的主要诱发因素；地震、坡脚开挖等对滑坡的发展、演化起到促进作用。因此，进一步研究断裂带滑坡的形成机理和成灾模式，对此类滑坡的防治预警有重要意义。
- 泄流坡滑坡 /
- 断裂活动 /
- 蠕滑 /
- 降雨 /
- 地震
Abstract: Based on detailed filed survey and deformation monitoring data for many years, deformation characteristics and formation mechanism of Xieliupo landslide in Zhouqu has been discussed. The result reveal that the landslide which lies in Pingding-Huama Fault Zone belong to a typical giant fault zone landslide being in an unstable state all the time.Xieliupo landslide is formed under the coupling of endogenic and exogenic geological processes.Shattered fault zone is a sufficient condition which resulted in Xieliupo landslide and fault activities lead the slope to plastic flow deformation.Rainfall is a main factor which triggering large-scale slip of the landslide.Furthermore, earthquake, toe cutting and other factors play promoting roles in the landslide's development and evolution.Therefore, further studies on the formation mechanism and disaster pattern of fault zone landslide have important significance towards the prediction and prevention of this type of landslide.
- Xieliupo landslide /
- fault activity /
- creep /
- rainfall /
- earthquake

HTML全文

图 1 泄流坡滑坡平面图

Figure 1. Planar graph of Xieliupo landslide

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图 2 泄流坡滑坡剖面图

Figure 2. Profile graph of Xieliupo landslide

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图 3 泄流坡滑坡体变形

Figure 3. Deformation phenomena of the Xieliupo landslide

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图 4 泄流坡滑坡前缘南侧新发生小滑坡（镜向东）

Figure 4. A newly happened small landslide in the south of the toe of Xieliupo landslide

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图 5 2006年监测桩累计位移曲线

Figure 5. Cumulative displacement curve of the monitoring piles in 2006

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图 6 2006、2007、2009年监测桩累计位移曲线

Figure 6. Cumulative displacement curve of the monitoring piles in 2006, 2007 and 2009

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图 7 年降雨量与全年日均位移量相关关系

Figure 7. Relationship between annual rainfall and annual daily mean displacement

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图 8 2006年月降雨量与监测桩的水平位移量相关关系

Figure 8. Relationship between monthly rainfall and horizontal displacement of monitoring piles in 2006

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图 9 2008、2009年2#监测桩位移量观测曲线

Figure 9. Displacement curve of 2# monitoring pile in 2008 and 2009

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