黄土滑坡滑带土工程特性的实验研究
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摘要
作为滑坡的重要组成部分,滑带土与滑坡的发展变形和稳定性密切相关,而滑带土强度特性的研究常成为滑坡研究中一个必要的内容。
泾阳南塬地区,位于陕西泾阳县泾河南岸,自1976年以来,先后发生大小滑坡40余次,其中大型滑坡7次,崩塌数次,滑坡非常发育,严重地威胁着人民群众的生命和财产安全。本文在前人研究的基础上,对其进行调查研究,进而对泾河南岸滑坡的整治提供科学依据。
本文在充分调研泾河南岸若干典型滑坡的区域地质环境及滑坡的发育特征的基础上,对该区各滑坡滑带土的工程特性进行了试验研究,包括滑带土的物理特性、强度特性、蠕变特性三个方面内容。
以试验为基础,结合不同含水情况滑带土的应力—位移曲线及强度曲线,系统分析和研究了研究区各滑坡滑带土强度特性的变化特征、规律,并初步探讨了其变形机理及影响因素,得出滑带土强度特性除了与物质组成外,与其赋存状态及自身的结构性关系密切。在此基础上,得出强度特性指标(c、? )与物性指标—含水量ω、液性指数IL相关关系,得到强度参数c、?与含水量ω、稠度指标IL之间呈较好的线性衰减关系,并给出了关系表达式。通过蠕变实验得出黄土滑坡滑带土蠕变规律,来确定Mesri蠕变模型的参数,并对模型进行了验证,得出Mesri蠕变模型可以较好地反映粘土等速蠕变阶段,且较适合于等速蠕变阶段应变速率较大的粘土。
本次试验研究成果,可做为典型黄土滑坡的稳定性评价及整治工程设计选用合理强度指标依据。
As an important component of landslide, slip soils have close relation with its development, deformation and stability, therefore, study on the shear strength properties of slip soils usually become a necessary part of the landslides research.
South Jingyang the plateau area, located at the Shanxi Jingyang County Jinghe River south, since 1976, south Jingyang the plateau has had the size landslide successively 40 time, the large-scale landslide 7 times, the avalanche several times, the landslide grew, is threatening people's life and the property security seriously.This article studies in the predecessor in the foundation, conducts the investigation and study to it, then the plateau landslide's improvement provides the scientific basis to Jingyang south.
This article is investigating and studying fully south Jingyang the plateau certain typical landslide regional geology environment and in the landslide growth characteristic foundation, has conducted the experimental study to this area various landslides slippery belt earth's project characteristic, including slippery belt earth physical character, intensity characteristic, creep property three aspect contents.
Take the experiment as the foundation, the union different watery situation slippery belt earth stress - displacement curve and the intensity curve, the system analysis and has studied the research area various landslides slippery belt earth intensity characteristic change characteristic, the rule, and has discussed its distortion mechanism and the influencing factor initially, obtains the slippery belt earth intensity characteristic besides with the material composition, saves the condition and own structure sexual relationship with its tax is close. Based on this, obtains the intensity characteristic target (c , ? ) with the natural target - water c?o anntedn tt,h teh ew laitqeur i dciotyn teinndt,e xb eItLw ceoernr e tlhaitcioknnaels sd etparegnedte nILc e a, sosubmtaienss tthhee ginotoedn s liivnee apra raatmtenetueart i ocn , relations, and has given the relational expression. Obtains the loess landslide slippery belt earth slow change rule through the slow change experiment, determined that the Mesri slow change model the parameter, and has carried on the confirmation to the model, obtains the Mesri slow change model to be possible to reflect the clay constant speed slow change stage well, and suits in the constant speed slow change stage strain speed big clay.
This experimental study achievement, may do for the typical loess landslide stable appraisal and the improvement engineering design selects the reasonable intensity index basis.
泾阳南塬地区,位于陕西泾阳县泾河南岸,自1976年以来,先后发生大小滑坡40余次,其中大型滑坡7次,崩塌数次,滑坡非常发育,严重地威胁着人民群众的生命和财产安全。本文在前人研究的基础上,对其进行调查研究,进而对泾河南岸滑坡的整治提供科学依据。
本文在充分调研泾河南岸若干典型滑坡的区域地质环境及滑坡的发育特征的基础上,对该区各滑坡滑带土的工程特性进行了试验研究,包括滑带土的物理特性、强度特性、蠕变特性三个方面内容。
以试验为基础,结合不同含水情况滑带土的应力—位移曲线及强度曲线,系统分析和研究了研究区各滑坡滑带土强度特性的变化特征、规律,并初步探讨了其变形机理及影响因素,得出滑带土强度特性除了与物质组成外,与其赋存状态及自身的结构性关系密切。在此基础上,得出强度特性指标(c、? )与物性指标—含水量ω、液性指数IL相关关系,得到强度参数c、?与含水量ω、稠度指标IL之间呈较好的线性衰减关系,并给出了关系表达式。通过蠕变实验得出黄土滑坡滑带土蠕变规律,来确定Mesri蠕变模型的参数,并对模型进行了验证,得出Mesri蠕变模型可以较好地反映粘土等速蠕变阶段,且较适合于等速蠕变阶段应变速率较大的粘土。
本次试验研究成果,可做为典型黄土滑坡的稳定性评价及整治工程设计选用合理强度指标依据。
As an important component of landslide, slip soils have close relation with its development, deformation and stability, therefore, study on the shear strength properties of slip soils usually become a necessary part of the landslides research.
South Jingyang the plateau area, located at the Shanxi Jingyang County Jinghe River south, since 1976, south Jingyang the plateau has had the size landslide successively 40 time, the large-scale landslide 7 times, the avalanche several times, the landslide grew, is threatening people's life and the property security seriously.This article studies in the predecessor in the foundation, conducts the investigation and study to it, then the plateau landslide's improvement provides the scientific basis to Jingyang south.
This article is investigating and studying fully south Jingyang the plateau certain typical landslide regional geology environment and in the landslide growth characteristic foundation, has conducted the experimental study to this area various landslides slippery belt earth's project characteristic, including slippery belt earth physical character, intensity characteristic, creep property three aspect contents.
Take the experiment as the foundation, the union different watery situation slippery belt earth stress - displacement curve and the intensity curve, the system analysis and has studied the research area various landslides slippery belt earth intensity characteristic change characteristic, the rule, and has discussed its distortion mechanism and the influencing factor initially, obtains the slippery belt earth intensity characteristic besides with the material composition, saves the condition and own structure sexual relationship with its tax is close. Based on this, obtains the intensity characteristic target (c , ? ) with the natural target - water c?o anntedn tt,h teh ew laitqeur i dciotyn teinndt,e xb eItLw ceoernr e tlhaitcioknnaels sd etparegnedte nILc e a, sosubmtaienss tthhee ginotoedn s liivnee apra raatmtenetueart i ocn , relations, and has given the relational expression. Obtains the loess landslide slippery belt earth slow change rule through the slow change experiment, determined that the Mesri slow change model the parameter, and has carried on the confirmation to the model, obtains the Mesri slow change model to be possible to reflect the clay constant speed slow change stage well, and suits in the constant speed slow change stage strain speed big clay.
This experimental study achievement, may do for the typical loess landslide stable appraisal and the improvement engineering design selects the reasonable intensity index basis.
引文
[1]王志荣,王念秦.黄土滑坡研究现状综述[J].中国水土保持,2004,(11).
[2]刘小丽,邓建辉,李广涛.滑带土强度特性研究现状[J].岩土力学,2004,25(1 l ):1849-1854,
[3]陕西地质矿产局陕西省区域地质志[M]北京:地质出版社,1989. 546- 556
[4]熊润清,西安地区区域地壳稳定性评价[J]陕西地质,1992, 10( 01):2-16
[5]徐邦栋.滑坡分析与防治[M].北京:中国铁道出版社,2000.
[6]申润植(日),李妥德译.滑坡防治理论与实践[M].北京:中国铁道出版社,1996.
[7]郑明新.论滑带土强度特征及强度参数的反算法[J].岩土力学,2003,24(04):528-532.
[8]杨强,陈新,周维垣等.抗剪强度指标可靠度分析[J].岩石力学与工程学报,2002,21(06):868-873.
[9]吴永峰.对滑带力学参数的若干探讨[A].中国岩石力学与工程学会第六次全国岩石力学与工程学术大会论文集[C].北京:中国科学出版社,2002:155-157.
[10]林鲁生,蒋刚,白世伟等.土体抗剪强度参数取值的统计分析方法[J].岩土力学,2003,24(02):277-280.
[11]张贵金,徐卫亚.岩土工程参数多重相关性的度量[J].岩石力学与工程学报,2004,23(07):1109-1113.
[12]李维树,邬爱清,丁秀丽.三峡库区滑带土抗剪强度参数的影响因素研究[J].岩土力学,2006,27(01):56-60.
[13]湛壮丽,李妥德,张颖均.滑坡滑带土抗剪强度研究现状,滑坡文集(三)[M].中国铁道出版社.
[14]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].中国铁道出版社,1979.
[15]李妥德.滑坡滑带土抗剪强度的确定方法[J].山地学报,1984。
[16]堪壮丽,李妥德,张颖钧.粘性滑带上剪切过程中结构变化与抗剪强度的关系[J].水文地质工程地质论丛(1). 1986,(02):161-174.
[17]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):2887-2892.
[18]周平根.滑带土强度参数的估算方法[J].水文地质工程地质,1998,(06):30-32,58.
[19]刘爱平,崔春龙.岩土体微观组构与力学性能关系研究现状与展望[J].西南科技大学学报,2003,18(02):75-78.
[20] Skempton.A.W.Long-term stability of clay slopes[J].Geotechnique,l964, 14(02):77-101.
[21] Morgenstern .N.R,Tchalenko J S. Microscopic structures in kaolin subjected to directshear[J].Geotechnique,1967,17(04):309-328.
[22] Wen .B.P, Aydin A.Microstructural study of a natural slip zone: quantification and deformationhistory [J].Engineering Geology,2003,68(03-04):289-317.
[23]严春杰,唐辉明,孙云志.利用扫描电镜和x射线衍射仪对滑坡滑带土的研究[J].地质科技情报,2001,20(04):89-92.
[24] Kanji.M.A. The relationship between drained friction angles and Atterberg limits of naturalsoils[J]. Geotechnique,1974,24(04): 671-674.
[29]维亚洛夫.C. C.杜余培译.土力学的流变原理[M].北京:科学出版社,1987.
[30]李同录,龙建辉,李新生.黄土滑坡发育类型及其空间预测方法[J].2007,15 ( 04)-0500-06
[31] Timothy .D.Stark, Hisham.T.Eid. Slope stability analysis in stiff fissured clays [J].Journal of Geotechnical and Geo-environmental Engineering,1997,123(4):335-343.
[32]Mesri.G, Shahien.M.Residual shear strength mobilized in first-time slope failures[J].Journal of Geotechnical and Geo-environmental Engineering,2003,129(1):12-31.
[2]刘小丽,邓建辉,李广涛.滑带土强度特性研究现状[J].岩土力学,2004,25(1 l ):1849-1854,
[3]陕西地质矿产局陕西省区域地质志[M]北京:地质出版社,1989. 546- 556
[4]熊润清,西安地区区域地壳稳定性评价[J]陕西地质,1992, 10( 01):2-16
[5]徐邦栋.滑坡分析与防治[M].北京:中国铁道出版社,2000.
[6]申润植(日),李妥德译.滑坡防治理论与实践[M].北京:中国铁道出版社,1996.
[7]郑明新.论滑带土强度特征及强度参数的反算法[J].岩土力学,2003,24(04):528-532.
[8]杨强,陈新,周维垣等.抗剪强度指标可靠度分析[J].岩石力学与工程学报,2002,21(06):868-873.
[9]吴永峰.对滑带力学参数的若干探讨[A].中国岩石力学与工程学会第六次全国岩石力学与工程学术大会论文集[C].北京:中国科学出版社,2002:155-157.
[10]林鲁生,蒋刚,白世伟等.土体抗剪强度参数取值的统计分析方法[J].岩土力学,2003,24(02):277-280.
[11]张贵金,徐卫亚.岩土工程参数多重相关性的度量[J].岩石力学与工程学报,2004,23(07):1109-1113.
[12]李维树,邬爱清,丁秀丽.三峡库区滑带土抗剪强度参数的影响因素研究[J].岩土力学,2006,27(01):56-60.
[13]湛壮丽,李妥德,张颖均.滑坡滑带土抗剪强度研究现状,滑坡文集(三)[M].中国铁道出版社.
[14]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].中国铁道出版社,1979.
[15]李妥德.滑坡滑带土抗剪强度的确定方法[J].山地学报,1984。
[16]堪壮丽,李妥德,张颖钧.粘性滑带上剪切过程中结构变化与抗剪强度的关系[J].水文地质工程地质论丛(1). 1986,(02):161-174.
[17]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):2887-2892.
[18]周平根.滑带土强度参数的估算方法[J].水文地质工程地质,1998,(06):30-32,58.
[19]刘爱平,崔春龙.岩土体微观组构与力学性能关系研究现状与展望[J].西南科技大学学报,2003,18(02):75-78.
[20] Skempton.A.W.Long-term stability of clay slopes[J].Geotechnique,l964, 14(02):77-101.
[21] Morgenstern .N.R,Tchalenko J S. Microscopic structures in kaolin subjected to directshear[J].Geotechnique,1967,17(04):309-328.
[22] Wen .B.P, Aydin A.Microstructural study of a natural slip zone: quantification and deformationhistory [J].Engineering Geology,2003,68(03-04):289-317.
[23]严春杰,唐辉明,孙云志.利用扫描电镜和x射线衍射仪对滑坡滑带土的研究[J].地质科技情报,2001,20(04):89-92.
[24] Kanji.M.A. The relationship between drained friction angles and Atterberg limits of naturalsoils[J]. Geotechnique,1974,24(04): 671-674.
[29]维亚洛夫.C. C.杜余培译.土力学的流变原理[M].北京:科学出版社,1987.
[30]李同录,龙建辉,李新生.黄土滑坡发育类型及其空间预测方法[J].2007,15 ( 04)-0500-06
[31] Timothy .D.Stark, Hisham.T.Eid. Slope stability analysis in stiff fissured clays [J].Journal of Geotechnical and Geo-environmental Engineering,1997,123(4):335-343.
[32]Mesri.G, Shahien.M.Residual shear strength mobilized in first-time slope failures[J].Journal of Geotechnical and Geo-environmental Engineering,2003,129(1):12-31.