武罐高速公路崔家梁黄土滑坡形成机理与稳定性分析
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摘要
武罐高速公路武都至洛塘段黄土滑坡分布密集,由于该地区黄土厚度较小,滑坡以浅～中层的中小型滑坡为主,研究认为该地区黄土滑坡的发生主要受降雨、地震和河流的影响,使滑坡表现出明显的周期性。以线路中比较典型的崔家梁黄土滑坡为研究对象,突出坡体结构在滑坡稳定性分析与计算中的重要作用,从滑坡地质结构与变形特征入手,建立滑坡坡体结构,分析滑坡形成机理和可能产生的失稳破坏模式,并进行稳定性分析与评价,确定滑坡变形状态。计算结果表明,崔家梁滑坡在天然状态时已接近极限平衡状态,在降雨或发生地震时稳定性将进一步降低从而可能产生整体滑动,为选择滑坡防治措施提供依据。
Due to the less thickness of loess and primary small and medium-sized landslides with shallow-middle layer in this region,there are intensive loess landslides distribution in the line of Wudu to Luotang on Wu-Guan expressway.At present,the loess landslides in this area have not attracted enough attention and recent studies suggest that the loess landslides in this region are mainly influenced by the rain,earthquake and river scour,the interaction of which make the landslide represent obvious cyclicity.Taking Cuijialiang loess landslide which is comparatively typical in the line as the research object,this paper highlighted the importance of slope structures in landslide stability analysis and calculation,established slope structures of the landslide by discussing the geological structure and the deformation characteristics,analyzed the landslide formation mechanism and its probable instability and failure mode,conducted stability analysis and evaluation,and determined the landslide deformation state.The calculation results showed that Cuijialiang landslide has already close to the limit equilibrium state in natural condition and the stability of the landslide will be further reduced and result in overall sliding when the earthquake or rainfall happens.The method introduced in this paper can provide basic information for the landslide prevention and control.
Due to the less thickness of loess and primary small and medium-sized landslides with shallow-middle layer in this region,there are intensive loess landslides distribution in the line of Wudu to Luotang on Wu-Guan expressway.At present,the loess landslides in this area have not attracted enough attention and recent studies suggest that the loess landslides in this region are mainly influenced by the rain,earthquake and river scour,the interaction of which make the landslide represent obvious cyclicity.Taking Cuijialiang loess landslide which is comparatively typical in the line as the research object,this paper highlighted the importance of slope structures in landslide stability analysis and calculation,established slope structures of the landslide by discussing the geological structure and the deformation characteristics,analyzed the landslide formation mechanism and its probable instability and failure mode,conducted stability analysis and evaluation,and determined the landslide deformation state.The calculation results showed that Cuijialiang landslide has already close to the limit equilibrium state in natural condition and the stability of the landslide will be further reduced and result in overall sliding when the earthquake or rainfall happens.The method introduced in this paper can provide basic information for the landslide prevention and control.
引文
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[15]王念秦.黄土滑坡的基本类型与活动特征[D].成都:成都理工大学,2004.
[16]陈永明,石玉成.中国西北黄土地区地震滑坡基本特征[J].地震研究,2006,29(3):276-280.
[2]吴玮江,王念秦.甘肃滑坡灾害[M].兰州:兰州大学出版社,2005:1-10.
[3]乔平定,李增均.黄土地区工程地质[M].北京:水利电力出版社,1990:1-50.
[4]许领,戴福初,闵弘.黄土滑坡研究现状与设想[J].地球科学进展,2008,23(3):236-242.
[5]张茂省,李同录.黄土滑坡诱发因素及其形成机理研究[J].工程地质学报,2011,19(4):530-540.
[6]章勇武,马惠民.山区高速公路滑坡与高边坡病害防治技术实践[M].北京:人民交通出版社,2007.
[7]涂鹏飞,岑仲阳,余和元.马家沟滑坡变形特征及稳定性分析[J].铁道建筑,2011(4):95-97.
[8]孙树珩.滑坡破坏机制及稳定性评价[J].铁道建筑,2011(9):87-89.
[9]孙玉科,牟会宠,姚宝魁.边坡岩体稳定性分析[M].北京:中国科学出版社,1988.
[10]马惠民,王恭先,周德培.山区高速公路高边坡病害防治实例[M].北京:人民交通出版社,2006.
[11]马惠民,吴红刚.山区高速公路高边坡病害防治实践[J].铁道工程学报,2011(7):34-41.
[12]周德培,钟卫,杨涛.基于坡体结构的岩质边坡稳定性分析[J].岩石力学与工程学报,2008,27(4):687-695.
[13]于贵.向家山大型复杂滑坡的坡体结构和变形机理[J].工程勘察,2009(12):49-53.
[14]戚国庆.降雨诱发滑坡机理及其评价方法研究[D].成都:成都理工大学,2004.
[15]王念秦.黄土滑坡的基本类型与活动特征[D].成都:成都理工大学,2004.
[16]陈永明,石玉成.中国西北黄土地区地震滑坡基本特征[J].地震研究,2006,29(3):276-280.
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