Analysis of reactivated characteristics and influencing factors of the Lamajue landslide in Meigu County of Sichuan Province
-
摘要:
工程建设的扰动成为老滑坡复活的重要因素，老滑坡复活反过来影响了工程建设及其安全运营。四川美姑拉马阿觉滑坡属于前缘复活的巨型老滑坡，通过现场监测和数值模拟手段，对滑坡复活变形特征与影响因素进行了分析，结果表明：（1）降雨及人类工程活动是诱发老滑坡复活的主要因素，复活滑坡位于老滑坡体前缘，滑坡蠕滑变形的体积约为255.6×104 m3；（2）滑坡体呈刚性滑动，表现出单滑面及岩质滑坡的特征，且滑动面大体位于基覆界面位置；（3）经过前后两期治理，抗滑桩阻挡滑体的效果明显，滑体稳定性得到了明显提高，目前滑体变形趋于稳定，可以满足电力设施正常工作的稳定性要求。文中的研究是基于工程实例开展的，其研究成果为滑坡的稳定性评价、防治工程设计、治理后工程效果评价提供一定的理论依据。
Abstract:Engineering construction disturbs old landslides and becomes an important factor for the revival of old landslides.The revival of the old landslide affects the construction and safe operation of the project.The Meigu Ramajue landslide in Sichuan is a typical giant old landslide, the leading edge of the old landslide is reactivated, through field monitoring and numerical simulation, the characteristics and influencing factors of landslide revival deformation were studied, the results show that: (1) Rainfall and human engineering activities are the main factors that induce the resurrection of the old landslide.The resurrected landslide is located at the front of the old landslide, and the creep deformation volume of the landslide is about 2.556 million cubic meters. (2)The landslide body slides rigidly, showing the characteristics of single sliding surface and rocky landslide, and the sliding surface is generally located at the base-covering interface. (3) After two stages of treatment, the anti-sliding piles have obvious effect of blocking the sliding body, and the stability of the sliding body has been significantly improved. At present, the deformation of the sliding body tends to be stable, which can meet the deformation and stability requirements of the normal operation of power facilities.The research of this paper is carried out based on engineering examples, and its research results provide a certain theoretical basis for landslide stability evaluation, prevention and control engineering design, and engineering effect evaluation after treatment.
-
Key words:
- old landslide /
- revival /
- deformation /
- influence factor /
- anti-slide pile
-
-
表 1 前、后期监测系统监测时间及施工时间表
Table 1. Pre-and post-monitoring system monitoring time and construction schedule
编号 开始日期 结束日期 抗滑桩施工完成日期 前期监测 JK02 2008年4月7日 2009年5月5日 2008年6月1日 后期监测 CX02 2012年7月27日 2013年6月9日 2013年2月11日 CX05 2012年7月24日 2013年7月26日 
下载: 导出CSV
表 2 数值计算参数取值
Table 2. Numerical calculation parameter value
岩土体名称 重度/
（kN·m−3)弹性模量/
MPa泊松比 黏聚力/
kPa内摩擦角/
（°）滑体 23.10 180
200.28 4.0 24 滑带 23.10 0.33 11.3 12 滑床 26.80 6700 0.25 2180 34 抗滑桩 25.00 28000 0.20 − −
下载: 导出CSV
-
[1] 孙东,殷志强,李大猛,等. 美姑河流域地质构造对大型滑坡孕育的控制作用[J]. 中国地质灾害与防治学报,2019,30(6):49 − 58. [SUN Dong,YIN Zhiqiang,LI Dameng,et al. Development of the large-scale landslides controlled by geological structures in Meigu River basin[J]. The Chinese Journal of Geological Hazard and Control,2019,30(6):49 − 58. (in Chinese with English abstract) doi: 10.16031/j.cnki.issn.1003-8035.2019.06.07
[2] 殷志强,孙东,张瑛,等. 美姑河流域滑坡时空展布及成生机制研究[J]. 第四纪研究,2018,38(6):1358 − 1368. [YIN Zhiqiang,SUN Dong,ZHANG Ying,et al. Study on spatial temporal distribution characteristics and forming mechanism of landslides in the Meigu River basin[J]. Quaternary Sciences,2018,38(6):1358 − 1368. (in Chinese with English abstract) doi: 10.11928/j.issn.1001-7410.2018.06.04
[3] 魏昌利,张瑛,冯文凯,等. 泯江上游槽谷曲流段大型古滑坡成因与复活性分析—以松潘县元坝子古滑坡为例[J]. 水文地质工程地质,2018,45(6):141 − 149. [WEI Changli,ZHANG Ying,FENG Wenkai,et al. Formation mechanism and reactivation analyses of large ancient landslides in the meandering trough valley of the upper Minjiang River:A case study of the Yuanbazi ancient landslide in Songpan County[J]. Hydrogeology & Engineering Geology,2018,45(6):141 − 149. (in Chinese with English abstract)
[4] 吴瑞安,马海善,张俊才,等. 金沙江上游沃达滑坡发育特征与堵江危险性分析[J]. 水文地质工程地质,2021,48(5):120 − 128. [WU Ruian,MA Haishan,ZHANG Juncai,et al. Developmental characteristics and damming river risk of the Woda landslide in the upper reaches of the Jinshajiang river[J]. Hydrogeology & Engineering Geology,2021,48(5):120 − 128. (in Chinese with English abstract) doi: 10.16030/j.cnki.issn.1000-3665.202104036
[5] 黄达,匡希彬,罗世林. 三峡库区藕塘滑坡变形特点及复活机制研究[J]. 水文地质工程地质,2019,46(5):127 − 135. [HUANG Da,KUANG Xibin,LUO Shilin. A study of the deformation characteristics and reactivation mechanism of the Outang landslide near the Three Gorges Reservoir of China[J]. Hydrogeology & Engineering Geology,2019,46(5):127 − 135. (in Chinese with English abstract) doi: 10.16030/j.cnki.issn.1000-3665.2019.05.17
[6] 张彦锋,铁永波,白永健,等. 云南永善县上坝老滑坡复活机制及新滑坡稳定性分析[J]. 中国地质灾害与防治学报,2020,31(3):41 − 49. [ZHANG Yanfeng,TIE Yongbo,BAI Yongjian,et al. Reactivation mechanism of the old landslide and stability analysis of the new landslide in Shangba,Yongshan County of Yunnan Province[J]. The Chinese Journal of Geological Hazard and Control,2020,31(3):41 − 49. (in Chinese with English abstract)
[7] 窦晓东,张泽林. 甘肃舟曲垭豁口滑坡复活机理及成因探讨[J]. 中国地质灾害与防治学报,2021,32(2):9 − 18. [DOU Xiaodong,ZHANG Zelin. Mechanism and causal analysis on the Yahuokou landslide reactivation and causes(Zhouqu County,Gansu,China)[J]. The Chinese Journal of Geological Hazard and Control,2021,32(2):9 − 18. (in Chinese with English abstract) doi: 10.16031/j.cnki.issn.1003-8035.2021.02.02
[8] 张永双,吴瑞安,郭长宝,等. 古滑坡复活问题研究进展与展望[J]. 地球科学进展,2018,33(7):728 − 740. [ZHANG Yongshuang,WU Ruian,GUO Changbao,et al. Research progress and prospect on reactivation of ancient landslides[J]. Advances in Earth Science,2018,33(7):728 − 740. (in Chinese with English abstract) doi: 10.11867/j.issn.1001-8166.2018.07.0728
[9] YIN Y P,HUANG B L,WANG W P,et al. Reservoir-induced landslides and risk control in Three Gorges project on Yangtze River,China[J]. Journal of Rock Mechanics and Geotechnical Engineering,2016,8(5):577 − 595. doi: 10.1016/j.jrmge.2016.08.001
[10] 黄润秋. 20世纪以来中国的大型滑坡及其发生机制[J]. 岩石力学与工程学报,2007,26(3):433 − 454. [HUANG Runqiu. Large-scale landslides and their sliding mechanisms in China since the 20th Century[J]. Chinese Journal of Rock Mechanics and Engineering,2007,26(3):433 − 454. (in Chinese with English abstract) doi: 10.3321/j.issn:1000-6915.2007.03.001
[11] 王恭先, 许峻岭, 刘光代, 等. 滑坡学与滑坡防治技术[M]. 北京: 中国铁道出版社, 2004
WANG Gongxian, XU Junling, LIU Guangdai, et al. Landslide science and landslide control technology[M]. Beijing: China Railway Publishing House, 2004. （in Chinese）
[12] 殷志强. 黄河上游因人工加载和降雨引发的虎头崖滑坡[J]. 中国地质灾害与防治学报,2014,25(4):10. [YIN Zhiqiang. Hutouya landslide caused by artificial loading and rainfall in the upper reaches of the Yellow Rive[J]. The Chinese Journal of Geological Hazard and Control,2014,25(4):10. (in Chinese with English abstract) doi: 10.16031/j.cnki.issn.1003-8035.2014.04.003
[13] 杜飞,任光明,夏敏,等. 地震作用诱发老滑坡复活机制的数值模拟[J]. 山地学报,2015,33(2):233 − 239. [DU Fei,REN Guangming,XIA Min,et al. Numerical simulation of ecurrence mechanism of old landslide under earthquake loading[J]. Mountain Research,2015,33(2):233 − 239. (in Chinese with English abstract) doi: 10.16089/j.cnki.1008-2786.000030
[14] 周平根. 滑坡监测的指标体系与技术方法[J]. 地质力学学报,2004,10(1):19 − 26. [ZHOU Pinggen. Indicator system and techniques of landslide monitoring[J]. Journal of Geomechanics,2004,10(1):19 − 26. (in Chinese with English abstract) doi: 10.3969/j.issn.1006-6616.2004.01.003
[15] 杨建. 柳洪拉马阿觉滑坡形成机制初步探讨[J]. 水电站设计,1995,11(1):41 − 44. [YANG Jian. Preliminary study on the formation mechanism of Lamajue landslide in Liuhong[J]. Design of Hydroelectric Power Station,1995,11(1):41 − 44. (in Chinese with English abstract)
[16] 宋亚伟,王卫,赵德庆. 拉马古滑坡前部局部复活变形特征及成因分析[J]. 山西建筑,2008,34(31):14 − 15. [SONG Yawei,WANG Wei,ZHAO Deqing. Analysis on deformation characteristics and reasons of revival local front of fossil landslide in Lama[J]. Shanxi Architecture,2008,34(31):14 − 15. (in Chinese with English abstract) doi: 10.3969/j.issn.1009-6825.2008.31.008
[17] 四川美姑河水电开发有限公司营地及220KV联合开关站地质勘察报告[R]. 西昌: 四川凉山地质勘察施工公司, 2006
Geological Investigation Report on the camp and 220 KV joint switch station of Sichuan Meigu River Hydropower Development Co. Ltd[R]. Xichang: Sichuan Liangshan Geological Survey and Construction Company, 2006. （in Chinese）
[18] 四川美姑河水电开发有限公司营地滑坡治理工程施工图设计报告[R]. 成都: 成都理工大学, 2008
Design report on construction drawing of landslide treatment project in the camp of Sichuan Meigu river hydropower development Co. Ltd[R]. Chengdu: Chengdu University of Technology, 2008. （in Chinese）
[19] 四川美姑河水电开发有限公司营地滑坡体监测报告[R]. 成都: 成都理工大学, 2009
Monitoring report on landslide in the camp of Sichuan Meigu river hydropower development Co. Ltd[R]. Chengdu: Chengdu University of Technology, 2009. （in Chinese）
[20] 凉山220KV美姑河开关站扩建工程滑坡治理施工图设计报告[R]. 成都: 成都理工大学, 2011
Design report on construction drawing of landslide control for extension project of 220 KV Meigu river switchgear station in Liangshan[R]. Chengdu: Chengdu University of Technology, 2011. （in Chinese）
[21] 凉山220KV美姑河开关站扩建工程滑坡体监测报告[R]. 成都: 成都理工大学, 2013
Monitoring report on landslide of 220 KV Meigu river switch station extension project in Liangshan[R]. Chengdu: Chengdu University of Technology, 2013. （in Chinese）
[22] 陈新泽,唐辉明,杨有成,等. 基于FLAC3D强度折减法滑坡三维稳定性研究—以三峡库区白果树古滑坡群为例[J]. 水文地质工程地质,2008,35(2):24 − 29. [CHEN Xinze,TANG Huiming,YANG Youcheng,et al. 3D analysis of landslide stability based on strength reduction FLAC3D:Taking Baiguoshu paleo-landslide group in the Three Gorges Reservoir area as example[J]. Hydrogeology & Engineering Geology,2008,35(2):24 − 29. (in Chinese with English abstract) doi: 10.3969/j.issn.1000-3665.2008.02.005
[23] WANG W, LI T B, WANG L S. The design of anti-slide pile and the interaction between anti-slide pile and slip mass[C]//Proceedings of the 9th International Conference on Engineering Geology in Developing Countries, 2002.
[24] 沈军辉,孙宝俊,靳晓光,等. 位移监测在滑坡评价预测中的应用[J]. 东南大学学报(自然科学版),2002,32(5):813 − 817. [SHEN Junhui,SUN Baojun,JIN Xiaoguang,et al. Application of displacement monitoring in appraising and forecasting landslide[J]. Journal of Southeast University (Natural Science Edition),2002,32(5):813 − 817. (in Chinese with English abstract)
-
图(12)
表(2)
计量
- 文章访问数: 482
- PDF下载数: 20
- 施引文献: 0