三峡库区巫峡口&mdash;独龙高陡岸坡变形破坏机理研究

刘广宁; 黄波林; 王世昌

doi:10.3969/j.issn.1001-5485.2015.02.019

PDF(3751 KB)

raybet体育在线院报 ›› 2015, Vol. 32 ›› Issue (2) : 92-97. DOI: 10.3969/j.issn.1001-5485.2015.02.019

岩土工程

三峡库区巫峡口—独龙高陡岸坡变形破坏机理研究

刘广宁,黄波林,王世昌

作者信息 +

Deformation and Failure Mechanism of High Steep Slope in the Area from Wu Gorge Entrance to Dulong of Three Gorges Reservoir Area

LIU Guang-ning,HUANG Bo-lin,WANG Shi-chang

Author information +

文章历史 +

摘要

三峡库区自175 m蓄水以来,地质灾害事件频发,尤其在地质环境脆弱的巫峡库岸段,2008年龚家方斜坡发生380 000 m³崩滑,产生高达13 m的涌浪,严重影响该库岸段航道运营安全。以巫峡口—独龙库岸段为研究区域,通过资料搜集、地面调查、工程地质测绘、山地工程等多种手段,在掌握其环境工程地质条件和岸坡岩体结构类型的基础上,根据库岸段内斜坡变形及破坏特征,划分出18个潜在不稳定斜坡。分析表明:该库岸段变形破坏模式为复合弯曲倾倒、“V”倾倒、剪切破坏,其可能诱发斜坡整体失稳模式为倾倒型和滑移型。总结出其存在累进性破坏、“锁固段”脆性破坏和整体性破坏3种机理。成果可为今后同类高陡岸坡的调查研究提供借鉴意义,同时为三峡库区防灾减灾、地质灾害工程治理提供依据。

Abstract

Geological disasters occurred frequently since the impoundment level of Three Gorges reservoir area reached 175mm. Especially in Wu Gorge where the geological environment is vulnerable, an amount of 380 000m³ collapsed at Gongjiafang slope in 2008, causing surge waves of 13m high, severely affecting the safety of waterway transportation. Through data gathering, ground investigation, engineering geology surveying and mapping, we researched the engineering geology and bank slope structure, and identified 18 potentially unstable slopes according to the bank slope’s deformation and failure features. Analysis shows that the deformation failure mode are composite bending-toppling, V-shape toppling and interlayer shear failure, which would give rise to toppling and sliding instability. There are three failure mechanisms: progressive failure, brittle failure in “locked area” and integral failure. The research achievements provide reference for similar high steep bank slope research in the future and for disaster prevention and mitigation in Three Gorges area.

导出引用

刘广宁,黄波林,王世昌. 三峡库区巫峡口—独龙高陡岸坡变形破坏机理研究[J]. raybet体育在线院报. 2015, 32(2): 92-97 https://doi.org/10.3969/j.issn.1001-5485.2015.02.019

LIU Guang-ning,HUANG Bo-lin,WANG Shi-chang. Deformation and Failure Mechanism of High Steep Slope in the Area from Wu Gorge Entrance to Dulong of Three Gorges Reservoir Area[J]. Journal of Changjiang River Scientific Research Institute. 2015, 32(2): 92-97 https://doi.org/10.3969/j.issn.1001-5485.2015.02.019

中图分类号： P642.22

参考文献

[1] HUANG Bo-lin, CHEN Li-de, PENG Xuan-ming, et al. Assessment of the Risk of Rockfalls in Wu Gorge, Three Gorges, China. Landslides, 2010,7(1):1-11.
[2] HUANG Bo-lin, YIN Yue-ping, LIU Guang-ning, et al. Analysis of Waves Generated by Gongjiafang .Landslide, 2012,9(3):395-405.
[3] 王高峰,王洪德,薛星桥,等.巫山县望霞危岩体破坏及再次变形失稳预测分析.自然灾害学报,2012,21(6):165-172.(WANG Gao-feng, WANG Hong-de, XUE Xing-qiao, et al. Failure Analysis of Wangxia Dangerous Rock Mass in Wushan County and Prediction of Its Next Deformation and Instability. Journal of Natural Disasters, 2012,21(6):165-172. (in Chinese))
[4] 刘广宁,陈立德,黄波林,等.影响巫峡横石溪马鞍子危岩体稳定性的因素分析.华南地质与矿产,2010, (2):67-70.(LIU Guang-ning, CHEN Li-de, HUANG Bo-lin, et al. Stability Factor of Maanzi Dangerous Rock Classification in Wu Gorge. Geology and Mineral Resources of South China, 2010, (2):67-70.(in Chinese))
[5] 刘广宁,陈立德,伏永朋,等.降雨和库水位升降对滑坡的影响.水土保持研究,2011,18(6):201-203.(LIU Guang-ning, CHEN Li-de, FU Yong-peng, et al. Influence of Rainfall and Reservoir Water Level Fluctuation on Landslide. Research of Soil and Water Conservation, 2011, 18(6): 201-203. (in Chinese))
[6] 宜昌地质矿产研究所.巫山地质图及说明书. 宜昌: 宜昌地质矿产研究所,2001.(Yichang Research Institute for Geology and Mineral Products. Geological Map and Specification of Wushan Geology . Yichang: Yichang Research Institute for Geology and Mineral Products, 2001. (in Chinese))
[7] VOELK H R. Deep-seated Mass Rock Creep along the Karakoram Highway and Its Geomorphological Consequences in the Middle Indus Valley near Chilas, Northern Pakistan . Geological Bulletin of the University of Peshawar, 2000, (33):11-27.
[8] 陈小婷,黄波林,刘广宁.三峡库区巫峡段茅草坡斜坡变形特征分析.水文地质工程地质,2012,29(3):102-107.(CHEN Xiao-ting, HUANG Bo-lin, LIU Guang-ning. Deformation Characteristic Analysis on Maocaopo Slope in Wu Gorge of Three Gorges Reservoir. Hydrogeology & Engineering Geology, 2012,29(3):102-107.(in Chinese))
[9] LI Shi-hai,LIAN Zhen-zhong,WANG J G. Effect of Rock Mass Structure and Block Size on the Slope Stability. Science in China Series E: Engineering & Materials Science, 2005,48(Sup.): 1-17.
[10] 刘广宁,黄波林,陈小婷,等.三峡龚家方4号斜坡变形破坏及影响因素分析.人民长江,2012,43(21):40-41. (LIU Guang-ning, HUANG Bo-lin, CHEN Xiao-ting, et al. Analysis on Deformation Damage and Influential Factors of Gonjiafang No. 4 Slope in Three Gorges Reservoir Area. Yangtze River, 2012, 43(21): 40-41. (in Chinese))
[11] 黄润秋,林峰,陈德基,等.岩质高边坡卸荷带形成及其工程性状研究.工程地质学报,2001,9(3):228-232. (HUANG Run-qiu, LIN Feng, CHEN De-ji, et al. Formation Mechanism of Unloading Fracture Zone of High Slops and Its Engineering Behaviors. Journal of Engineering Geology, 2001,9(3):228-232. (in Chinese))
[12] 张悼元,王士天,王兰生.工程地质分析原理.北京:地质出版社,1981.(ZHANG Zhuo-yuan, WANG Shi-tian, WANG Lan-sheng. Principles of Engineering Geology. Beijing: Geological Publishing House, 1981. (in Chinese))
[13] 殷跃平.三峡库区边坡结构及失稳模式研究.工程地质学报,2005,13(2):146-154. (YIN Yue-ping. Research on Structure and Failure Model of Slope in the Three Gorges Reservoir. Journal of Engineering Geology, 2005,13(2):146-154. (in Chinese))
[14] 董好刚,彭轩明,陈州丰,等.缓倾层状高边坡典型破坏模式及宏观判据研究.raybet体育在线院报,2009,26(8):37-40. (DONG Hao-gang, PENG Xuan-ming, CHEN Zhou-feng, et al. Typical Failure Modes and Identification of Low-angled Stratofabric Rock Slope. Journal of Yangtze River Scientific Research Institute, 2009,26(8):37-40. (in Chinese))
[15] 史文兵,续建科,唐晓玲.反倾向层状岩质边坡失稳模式及支护对策.水利与建筑工程学报,2011,9(1):96-97. (SHI Wen-bing, XU Jian-ke, TANG Xiao-ling. Failure Models and Supporting Measures of Antidip Sandwich Rock Slope. Journal of Water Resources and Architectural Engineering,2011,9(1):96-97. (in Chinese))
[16] 许强.滑坡的变形破坏行为与内在机理.工程地质学报,2012,20(2):146-151. (XU Qiang. Theoretical Studies on Prediction of Landslides Using Slope Deformation Process Data. Journal of Engineering Geology, 2012,20(2):146-151. (in Chinese))
[17] 常中华,伍法权,张二勇,等.三峡水库区奉节县典型岩质斜坡变形破坏模式及成因机制分析.中国地质灾害与防治学报, 2004,15(4):21-24. (CHANG Zhong-hua, WU Fa-quan, ZHANG er-yong, et al. Deformation and Failure Modes and Genetic Mechanisms of Typical Rocky Slopes in Fengjie County, Three Gorges Reservoir Region. The Chinese Journal of Geological Hazard and Control, 2004,15(4):21-24. (in Chinese))
[18] 邹丽芳,徐卫亚,宁宇,等.反倾层状岩质边坡倾倒变形破坏机理综述.raybet体育在线院报, 2009,26(5):26-30.(ZOU Li-fang, XU Wei-ya, NING Yu, et al. Overview of Toppling Failure Mechanism of Countertendency Layered Rock Slopes. Journal of Yangtze River Scientific Research Institute, 2009, 26(5):26-30. (in Chinese))