四川省峨眉山市王山-抓口寺滑坡成因机理研究

魏云杰; 褚宏亮; 庄茂国; 王灿峰; 柏永岩

doi:10.13544/j.cnki.jeg.2016.03.018

四川省峨眉山市王山-抓口寺滑坡成因机理研究

doi: 10.13544/j.cnki.jeg.2016.03.018

1.
中国地质环境监测院国土资源部地质灾害应急技术指导中心北京 100081;
2.
四川省地质环境监测总站成都 610071

基金项目:

十二五国家科技支撑项目(2012BAK10B01),国家自然科学基金项目(41172254),中国地质调查局基金项目(1212011220124)资助

详细信息

作者简介:
魏云杰(1973-),男,博士,教授级高工,主要从事地质灾害、岩土工程等相关领域研究.Email:wyj1973@126.com

中图分类号: P642.22
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出版历程
- 收稿日期: 2016-01-15
- 修回日期: 2016-05-24
- 刊出日期: 2016-06-25

FORMATION MECHANISM OF WANGSHAN-ZHUAKOUSHI LANDSLIDE IN EMEI CITY, SICHUAN PROVINCE

1.
China Institute of Geological Environment Monitoringthe Ministry of Land and Resources of Geological Disasters Emergency Technical Guidance Center China, Beijing 100081;
2.
Sichuan Geological Environmental Monitoring Station, Chengdu 610071

摘要

摘要: 2015年6月14日,受连续强降雨影响,峨眉山市九里镇兴阳村王山-抓口寺不稳定斜坡发生滑动,威胁27户52人的安全,由于当地政府提前组织人员紧急撤离,滑坡未造成人员伤亡,直接经济损失约为500万元,间接经济损失3000余万元。通过现场调查和模拟计算,结果表明:(1)滑坡稳定性受凝灰岩夹层控制,受早期采矿开挖和512汶川地震影响,岩体结构破碎,其稳定性处于临界状态,属于滑移-拉裂型; (2)降雨是导致滑坡形成的直接因素,降雨入渗后并转化为地下水,沿凝灰岩夹层上层面流动,滑坡稳定性系数逐渐降低,在重力作用下发生失稳破坏; (3)通过现场调查和分析,总结了滑坡应急避险成功经验及措施。
- 玄武岩 /
- 滑坡 /
- 岩体结构 /
- 成因机理 /
- 应急避险
Abstract: On June 14, 2015, an unstable slope in Xingyang village Jiuli town Ermeishan city begun to slide after continuous rainfall. It was named as Wangshan-zhuakousi landslide. It threatened more than 52 people and their property. It also caused a direct economic loss of about 5million RMB, and an indirect economic loss of more than 30million RMB. Due to timely and effective emergency evacuation by the local government organization, the landslide had no casualties. On the basis of field investigation and simulation calculation, the conclusions are as follows:(1)the landslide is belonged to the slip-cracking type. Its stability is governed by tuff interlayers. In meanwhile, the rock mass structure of landslide was crushed by the early mining excavation and 512 Wenchuan earthquake, which made the stability of landslide in critical condition.(2)Rainfall was the direct triggering factor of landslide formation. The rainfall mainly infiltrated the rock mass and became the groundwater which flowed along the tuff layer. With its weight increasing, stability coefficient of landslide was gradually reduced until high-speed landslide happened.(3)According to the characteristics of landslide in basalt area, the corresponding landslide emergency safety measures are summarizes.
- Basalt /
- Landslide /
- Rock mass structure Formation mechanism /
- Emergency hedge /

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