陕西宝鸡地区千阳县塌山黄土滑坡稳定性分析
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摘要
通过对宝鸡塌山黄土滑坡详细调查和钻探结果表明:具有特殊性的黄土为塌山黄土滑坡形成提供了物质基础;斜坡地形地貌、顺向斜坡结构、黄土节理等为塌山黄土滑坡提供了边界条件;人类活动、降水等是塌山黄土滑坡形成的主导诱发因素;多种因素相辅相成,导致塌山黄土滑坡发生发展。其次,采用SARMA法和FLAC法对滑坡稳定性进行了计算和模拟分析,通过对滑坡体土体应力的分析与滑坡安全系数计算表明,在天然状态下塌山黄土滑坡现今整体稳定,局部(滑坡前缘左侧)有失稳可能,这与野外调查塌山黄土滑坡现今变形特征以及整体稳定局部可能失稳的结论基本一致。而在饱和状态、天然状态+地震、饱和状态+地震3种工况下,塌山黄土滑坡整体失稳的可能性较大。
It presents results of detailed investigation and drilling at the landslide.The results indicate that the special loess provides the material foundation for the formation of the landslide.Secondly,the slope relief,consequent slope structure,loess joints and so on provide the boundary conditions for the landslide instability.Next,human activities and precipitation and so on are the predominant e inducing factors for the instability.The various factors are complement to each other to lead to the development and taking place of the landslide.Based on the above results,this paper uses the SARMA and FLAC methods to calculate and simulate the stability extent of the landslide.The analysis of soil body stress and calculation o the factor of safety factor for the landslide show that although the landslide is in a stable state as a whole,there is the possibility for a partial instability of landslide at the left side of front edge.This analysis result is basically in accordance to the result of the field investigation result.But,in the saturated state,the natural and seismic state,the saturated and seismic state,the probability for a whole instability of the landslide is high.
It presents results of detailed investigation and drilling at the landslide.The results indicate that the special loess provides the material foundation for the formation of the landslide.Secondly,the slope relief,consequent slope structure,loess joints and so on provide the boundary conditions for the landslide instability.Next,human activities and precipitation and so on are the predominant e inducing factors for the instability.The various factors are complement to each other to lead to the development and taking place of the landslide.Based on the above results,this paper uses the SARMA and FLAC methods to calculate and simulate the stability extent of the landslide.The analysis of soil body stress and calculation o the factor of safety factor for the landslide show that although the landslide is in a stable state as a whole,there is the possibility for a partial instability of landslide at the left side of front edge.This analysis result is basically in accordance to the result of the field investigation result.But,in the saturated state,the natural and seismic state,the saturated and seismic state,the probability for a whole instability of the landslide is high.
引文
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[14]李莉.边坡稳定性分析方法与工程应用[D].北京:北京科技大学,2005.Li Li.The slope stability analysis methods and engineering appli-cation.Beijing:University of Science&Technology Beijing,2005.
[15]何本贵.高陡路堑边坡稳定性分析与可靠性评价[D].北京:北京科技大学,2005.He Bengui.The stability study and reliability analysis of high andprecipitous road moat side slope.Beijing:University of Science&Technology Beijing,2005.
[16]王惠勇.基于鸡爪沟地形路基变形规律和路堑边坡稳定评价[D].湖南:长沙交通学院,2004.Wang Huiyong.Deformation feature of subgrade and cutting sta-bility analysis based on the clawditch topography.Hunan:Chan-gsha Communications University,2004.
[2]曲永新,张永双,覃祖淼.三趾马红土与西北黄土高原滑坡[J].工程地质学报,1999,7(3):257~265.Qu Yongxin,Zhang Yongshuang,Tan Zumiao.Hipparion lateriteand landslide hazards on loess plateau of Northwestern China.Journal of Engineering Geology,1999,7(3):257~265.
[3]文宝萍,李媛,王兴林.黄土地区典型滑坡预测预报及减灾对策研究[M].北京:地质出版社,1997.Wen Baoping,Li Yuan,Wang Xinglin.The mitigation and coun-termeasures study of typical landslide in loess region.Beijing:Ge-ology Publishing House,1997.
[4]谭成轩,王瑞江,吴树仁,等.滑坡稳定性三维数值模拟分析[J].长春科技大学学报,1999,29(3):267~271.Tan Chengxuan,Wang Ruijiang,Wu Shuren,et al..Analysis onlandslide stability by using three-dimensional numerical simula-tion.Journal of Changchun University Science and Technology,1999,29(3):267~271.
[5]钱家欢,殷宗泽.土工计算与原理[M].北京:中国水利水电出版社,1996.Qian Jiahuan,Yin Zongze.Earthwork calculation and principle.Beijing:China WaterPower Press,1996.
[6]郑颖人,陈祖煜,王恭先,等.边坡与滑坡工程治理[M].北京:人民交通出版社,2007.Zheng Yingren,Chen Zuyu,Wang Gongxian,et al..The engi-neering management about side slope and landslide.Beijing:Chi-na Communications Press,2007.
[7]陈祖煜.土质边坡稳定分析-原理.方法.程序[M].北京:中国水利水电出版社,2003.Chen Zuyu.Soil slope stability analysis principle,method,process.Beijing:China Water Power Press,2003.
[8]何满潮,霍起元.萨尔码方法及其应用[J].长春地质学院学报,1986,(1):66~72.He Manzhao,Huo Qiyuan.Sarma method and its application togeology.Journal of Changchun Geological College,1986,(1):65~72.
[9]魏国安.Sarma法在西安—南京线老牛坡滑坡稳定性分析中的应用[J].铁道工程学报,1999,(3):78~81.Wei Guoan.Application of sarma method on stability analysis oflandslide at Laoniupo on Xi′an—Nanjing railway line.Journal ofRailway Engineering Society,1999,(3):78~81.
[10]牟涛,孔寿军,秦大燕.利用FLAC进行某公路边坡稳定性分析[J].广西城镇建设,2007,72~74.Mu Tao,Kong Shoujun,Qin Dayan.Using FLAC on a highwayslope stability analysis.Cites and Towns Construction in Guan-gxi,2007,72~74.
[11]刘亚明.露天边坡下地下开挖对边坡稳定性影响的研究[D].北京:北京科技大学,2006.Liu Yaming.Underground excavation influence on slope stabilityunder open slope.Beijing:University of Science&TechnologyBeijing,2006.
[12]赵静波.高陡岩质边坡失稳预测预报理论研究与应用[D].北京:北京科技大学,2005.Zhao Jingbo.Forecast model for stability of layered rocky slopebased on observed shear displacement.Beijing:University of Sci-ence&Technology Beijing,2005.
[13]李丹.FLAC的原理程序及其在高填路基变形与稳定分析中的应用[D].福建:福州大学,2006.Li Dan.Principle and program of FLAC and its application in a-nalysis of deformation and stability on high subgrade.Fujian:Fuzhou university,2006.
[14]李莉.边坡稳定性分析方法与工程应用[D].北京:北京科技大学,2005.Li Li.The slope stability analysis methods and engineering appli-cation.Beijing:University of Science&Technology Beijing,2005.
[15]何本贵.高陡路堑边坡稳定性分析与可靠性评价[D].北京:北京科技大学,2005.He Bengui.The stability study and reliability analysis of high andprecipitous road moat side slope.Beijing:University of Science&Technology Beijing,2005.
[16]王惠勇.基于鸡爪沟地形路基变形规律和路堑边坡稳定评价[D].湖南:长沙交通学院,2004.Wang Huiyong.Deformation feature of subgrade and cutting sta-bility analysis based on the clawditch topography.Hunan:Chan-gsha Communications University,2004.
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