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| STUDY OF APPLICABILITY OF STRENGTH PARAMETERS OF SLIDING ZONE SOIL BASED ON EFFECTIVE VERTICAL STRESS LEVEL |
| CHEN Chuansheng，ZHANG Jianmin，WEN Shizhi |
| (Institute of Environmental Science and Engineering，Central South University of Forestry and Technology，Changsha，Hunan 410004，China) |
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Abstract The strength parameters of sliding zone soil are indispensable factors for stability evaluation and countermeasure design for landslides. Based on the previous study results，the shear tests on sliding zone soil derived from Xuecheng landslide，located along Zagunao river，Sichuan province，are conducted as follows：first the sliding zone soil is consolidated；then large displacement ring sheared，then consolidated again，and last ring sheared again；and the strength characteristics of sliding zone soil of the reactivated landslide are simulated and clarified. The method for determining and selecting the residual strength and recovered strength parameters depending on different effective vertical stresses is proposed and proved to be useful and rational for the reactivated landslide. The method may provide some important references for rationally choosing strength parameters of sliding zone soil of the reactivated landslide.
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Received: 29 December 2010
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| [1] SKEMPTON A W. Residual strength of clays in landslides，folded strata and the laboratory[J]. Geotechnique，1985，35(1)：3–18.
[2] 廖秋林，李 晓，李守定，等. 三峡库区千将坪滑坡的发生、地质地貌特征、成因及滑坡判据研究[J]. 岩石力学与工程学报，2005，24(17)：3 146–3 153.(LIAO Qiulin，LI Xiao，LI Shouding，et al. Occurrence，geology and geomorphy characteristics and origin of Qianjiangping landslide in Three Gorges reservoir area and study of ancient landslide criterion[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(17)：3 146–3 153.(in Chinese))
[3] 许建聪，尚岳全. 碎石土古滑坡稳定性分析[J ]. 岩石力学与工程学报，2007，26(1)：57–65 (XU Jiancong，SHANG Yuequan. Stability analysis of ancient debris landslide[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(1)：57–65.(in Chinese))
[4] 张 昆，郭菊彬. 滑带土残余强度参数试验研究[J]. 铁道工程学报，2007，24(8)：13–15.(ZHANG Kun，GUO Jubin. Experimental research on the residual strength parameters of slip soils[J]. Journal of Railway Engineering Society，2007，24(8)：13–15.(in Chinese))
[5] 王恭先. 滑坡防治中的关键技术及其处理方法[J]. 岩石力学与工程学报，2005，24(21)：3 818–3 827.(WANG Gongxian. Key technique in landslide control and its handling[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(21)：3 818–3 827.(in Chinese))
[6] 沈 强，陈从新，汪 稔. 云南玄武岩滑坡滑动面力学参数分析[J]. 岩土力学，2006，27(12)：2 309–2 313.(SHEN Qiang，CHEN Congxin，WANG Ren. Analysis of mechanical parameters of slip surface for basalt landslide in Yunnan[J]. Rock and Soil Mechanics，2006，27(12)：2 309–2 313.(in Chinese))
[7] 宜保清一. 残留係数を導入した安定解析法－沖縄島尻層群泥岩地すべりへの適用－[J]. 地すべり，1996，33(2)：46–50.(GIBO S. Stability analysis method in which the residual factor is incorporated- application to the landslides in the Shimajiri mudstone of Okinawa[J]. Journal of Japan Landslide Society，1996，33(2)：46–50.(in Japanese))
[8] 李妥德，张颖均. 国内外滑坡土残余强度的研究现状(滑坡文集(二))[M]. 北京：中国铁道出版社，1979：8–10.(LI Tuode，ZHANG Yingjun. Present situation of domestic and overseas studies on residual strength(Landslide Collection(II))[M]. Beijing：China Railway Publishing House，1979：8–10.(in Chinese))
[9] CHANDLER R J. Back analysis techniques for slope stabilization works：a case record[J]. Geotechnique，1977，27(4)：479–495.
[10] 任光明，聂德新，左三胜. 滑带土结构强度再生研究[J]. 地质灾害与环境保护，1996，7(3)：7–12.(REN Guangming，NIE Dexin，ZUO Sansheng. Study on cohesion restoration of slide zone soil[J]. Journal of Geological Hazards and Environment Preservation，1996，7(3)：7–12.(in Chinese))
[11] 任光明，聂德新. 大型滑坡滑带土结构强度再生特征及其机制探讨[J]. 水文地质工程地质，1997，44(3)：28–31.(REN Guangming，NIE Dexin. Investigation on restoration of the structure strength property and mechanism of slide zone soil of a large-scale landslide[J]. Hydrogeology and Engineering Geology，1997，44(3)：28–31.(in Chinese))
[12] 田 斌，戴会超，王世梅. 滑带土结构强度特征及其强度参数取值研究[J]. 岩石力学与工程学报，2004，23(17)：2 887–2 892.(TIAN Bin，DAI Huichao，WANG Shimei. Strength characteristics of soil in slide zone and determination of its parameters[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(17)：2 887–2 892.(in Chinese))
[13] GIBO S，EGASHIRA K，OHTSUBO M，et al. Strength recovery form residual state in reactivated landslides[J]. Geotechnique，2002，52(9)：683–686.
[14] 中村真也，宜保清一，周亜明. 地すべり土の残留強度包絡線の湾曲化と強度定数決定手法[J]. 地すべり，1999，36(1)：28–34. (NAKAMURA S，GIBO S. ZHOU Y. Determination of parameters for curved residual strength envelopes of landslide soils[J]. Journal of Japan Landslide Society，1999，36(1)：28–34.(in Japanese)
[15] American Society for Testing and Materials. D6467—2008c Standard test method for torsional ring shear test to determine drained residual shear strength of cohesive soils[S]. West Conshohocken：American Society for Testing and Materials，2008.
[16] American Society for Testing and Materials. 2010a Standard test method for torsional ring shear test to determine drained fully softened shear strength of cohesive soils[S]. West Conshohocken：American Society for Testing and Materials，2010.
[17] STARK T D，CHOI H，MCCONE S. Drained shear strength parameters for analysis of landslides[J]. Journal of Geotechnical and Geoenvironmental Engineering，2005，131(5)：575–588.
[18] BISHOP A W，GREEN G E，GARGA V K，et al. A new ring-shear apparatus and its application to the measurement of residual strength[J]. Geotechnique，1971，21(4)：273–328.
[19] GIBO S，EGASHIRA K，OHTSUBO M. Residual strength of smectite-dominated soils from the Kamenose landslide in Japan[J]. Canadian Geotechnical Journal，1987，24(3)：456–462.
[20] SKINNER A E，VAUGHAN P R，LUPINI J F. The drained residual strength of cohesive soils[J]. Geotechnique，1981，31(2)：181–213.
[21] HAWKINS A B，PRIVETT K D. Measurement and use of residual shear strength of cohesive soils[J]. Ground Engineering，1985，18(8)：22–29. |
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2011, Vol. 30 
