草坪上滑坡形成机制及其稳定性评价
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摘要
位于九寨沟双河乡的草坪上滑坡属高烈度大型滑坡,一旦失稳,危害严重。通过对滑坡地质背景、结构特征和变形破坏特征的分析,确定该滑坡变形属重力蠕滑型。结合试验资料,通过参数反演确定计算参数,利用传递系数法对滑坡稳定性进行定量评价。评价表明,在天然、地震或暴雨工况下,滑体整体处于稳定状态。暴雨条件下,其前缘稳定性迅速降低,可能失稳。
The landslide,a large-scale landslide of high-intensity located at Shuanghe Township of Jiuzhaogou,will cause serious hazards in case of instability.It is determined as a gravity-creep type through an analysis of its geological background,structural features and deformation-failure characteristics.The transfer coefficient method is applied to assess its stability quantitatively,with experimental data used and calculation parameters determined by the parameter inversion method.It is assessed to be stable as a whole in natural,earthquake or heavy rain conditions,yet with the possibility of its leading edge being unstable in storms.
The landslide,a large-scale landslide of high-intensity located at Shuanghe Township of Jiuzhaogou,will cause serious hazards in case of instability.It is determined as a gravity-creep type through an analysis of its geological background,structural features and deformation-failure characteristics.The transfer coefficient method is applied to assess its stability quantitatively,with experimental data used and calculation parameters determined by the parameter inversion method.It is assessed to be stable as a whole in natural,earthquake or heavy rain conditions,yet with the possibility of its leading edge being unstable in storms.
引文
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[2]张倬元,王士天,王兰生.工程地质分析原理[M].北京:地质出版社,1994.
[3]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.
[4]陈万业,董兰凤.某水电站库区一大型滑坡的形成机制与环境影响评价[J].水土保持研究,2006,13(6):282-287.
[5]李朋丽,等.永蓝高速公路K18+000～K18+350滑坡成因分析与防治措施研究[J].中国地质灾害与防治学报,2010,21(1):19-23.
[6]聂凤军,张宁.黑龙江省莲河村滑坡稳定性评价及防治措施[J].中国地质灾害与防治学报,2010,21(1):24-27.
[7]刘宝臣,等.藤州中学滑坡特征及稳定性评价[J].地质灾害与环境保护,2010,21(1):54-57.
[8]赵建军,等.汶川地震诱发罐滩滑坡形成机制初步分析[J].地质灾害与环境保护,2010,21(2):92-96.
[9]刘心彪.甘肃武都马槽沟滑坡特征及治理对策[J].中国地质灾害与防治学报,2011,22(1):22-26.
[10]王万迁,等.江油市敬元乡新房村17社滑坡稳定性分析[J].地质灾害与环境保护,2011,22(2):60-64.
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