陕西略阳南山滑坡复活成因及稳定性分析
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摘要
略阳县南山滑坡多次出现复活的迹象,严重威胁了滑坡体上及坡下的几十栋办公楼、住宅楼及近2000人的生命财产安全。本文通过对滑坡的调查,钻探及室内试验,分析了滑坡蠕动变形及可能复活的原因。利用滑坡稳定性计算的结果对其危险性进行了评估,结果表明滑坡在正常状态下是稳定的,但是在饱水及地震等不利工况下,坡体有失稳的可能,特别是滑坡前缘的陡坡段发生破坏的可能性大,需要采取措施进行治理。
The resurrection signs of Nanshan landslide,which is in Lueyang County,Shaanxi province,have been appeared many times.It seriously threatens dozens of office buildings,residential buildings and nearly 2000 residents' lives and their property safety.Through investigation,drilling and testing,three reasons made the Landslide creep deformation and the possible resurrection.The stability calculation shows that the landslide is stable in normal circumstance,but in adverse conditions such as saturated or earthquake,landslide will lose stability in whole,it should be noted that it is more dangerous at steep slope section of frontal edge of the landslides.Therefore,it needs to take measures to control.
The resurrection signs of Nanshan landslide,which is in Lueyang County,Shaanxi province,have been appeared many times.It seriously threatens dozens of office buildings,residential buildings and nearly 2000 residents' lives and their property safety.Through investigation,drilling and testing,three reasons made the Landslide creep deformation and the possible resurrection.The stability calculation shows that the landslide is stable in normal circumstance,but in adverse conditions such as saturated or earthquake,landslide will lose stability in whole,it should be noted that it is more dangerous at steep slope section of frontal edge of the landslides.Therefore,it needs to take measures to control.
引文
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[5]李德心,何思明,李军歌,等.降雨作用下山区边坡稳定性分析[J].中国地质灾害与防治学报,2011,22(1):7-10.LI Dexin,HE Siming,LI Junge,et al.Effect of rainfall onslope stability in mountainous area[J].The ChineseJournal of Geological Hazard and Control,2011,22(1):7-10.
[6]张国伟,董云鹏,赖绍聪,等.秦岭-大别造山带南缘勉略构造带与勉略缝合带[J].中国科学D辑,2003,33(12):1121-1135.ZHANG Guowei,DONG Yunpeng,LAI Shaocong,et al.Mianlue tectonic belt and structure zone on the southernmargin of the Qinling-Dabie orogenic belt[J].Sciencein China(Ser.D),2003,33(12):1121-1135.
[7]钱家欢,殷宗泽.土工原理与计算[M].北京:中国水利水电出版社,1996.QIAN Jiahuan,YIN Zongze.Geotechnical principles andcalculation[M].Beijing:China Water Power Press,1996.
[8]方玉树.边坡稳定性分析条分法最小解研究[J].岩土工程学报,2008,30(3):331-335.FANG Yushu.The lowest solution of slice method for slopestability analysis[J].Chinese Journal of GeotechnicalEngineering,2008,30(3):331-335.
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