陕西安康宝塔梁崩滑变形体稳定性分析计算探讨
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摘要
宝塔梁崩滑变形体位于陕西省安康市镇坪县城关镇菜村的宝塔梁陡坡上,地处南江河右岸。该崩滑体最早发现于1987年,至2008年1月,一直未发生明显的变形。2008年2月1日开始变形,2月23日,崩滑变形体前缘临沿江路的崩塌面宽度由原先的数米宽增至60～70m,且向陡崖上部延伸发展,陡崖不断地垮塌,完全阻断了沿江路,3～4月采取减载应急处理,其后基本没有再发生大的变形。在详细描述崩滑体变形特征和破碎程度的基础上,认为该崩滑体岩体呈散体或碎裂状,碎块间结合力差,属大型崩滑体。采用钻探、探井、浅层地震勘探、瑞雷波测试和室内试验等到多种方法,分析确定了变形体的形态、变形状态及其边界,给定了变形结构面及计算参数,并以此参数进行了稳定性验算。结果表明,该崩滑体Ⅰ-Ⅰ和Ⅲ-Ⅲ剖面处于欠稳定状态,Ⅱ-Ⅱ剖面处于基本稳定状态,总体处于欠稳定状态。研究结果在2009年7月崩滑变形体的复活变形中得到了验证。
The Baotaliang slump deformed mass is situated on a Nanjiang River right bank steep slope in the Caicun village,Chengguan Township,Zhenping County,Shaanxi Province.The slump mass was first found in 1987,and has not been obviously deformed until January,2008.The deformation was started from 1st of February,2008,on 23rd of February,the collapsed face width of slump deformed mass front along the riverside road was increasing from original meters to 60~70m and stretched to upper part of the steep slope,the slope collapsing ceaselessly,and fully interdicted riverside road.Emergency deloading has been carried out during March and April,and then no longer large deformation happened afterwards.Based on detailed description of slump mass deformation features and degree of crushing,considered that the slump mass has presented spall off or disintegration,poor binding force between fragments,and belongs to large type slump mass.Multiple methods including drilling,prospect pit,shallow seismic prospecting,Rayleigh wave test and indoor tests,analyzed and identified configuration,deformation state and boundary of the deformed mass,gave deformation structural plane and computing parameters,and took the parameters carried out stability checking computations.The result has demonstrated that the I―I and III―III sections of slump mass stand in understable state,while the II―II section in stable state,as a whole in understable state.The study result has been verified in July 2009 slump deformed mass rejuvenated deformation.
The Baotaliang slump deformed mass is situated on a Nanjiang River right bank steep slope in the Caicun village,Chengguan Township,Zhenping County,Shaanxi Province.The slump mass was first found in 1987,and has not been obviously deformed until January,2008.The deformation was started from 1st of February,2008,on 23rd of February,the collapsed face width of slump deformed mass front along the riverside road was increasing from original meters to 60~70m and stretched to upper part of the steep slope,the slope collapsing ceaselessly,and fully interdicted riverside road.Emergency deloading has been carried out during March and April,and then no longer large deformation happened afterwards.Based on detailed description of slump mass deformation features and degree of crushing,considered that the slump mass has presented spall off or disintegration,poor binding force between fragments,and belongs to large type slump mass.Multiple methods including drilling,prospect pit,shallow seismic prospecting,Rayleigh wave test and indoor tests,analyzed and identified configuration,deformation state and boundary of the deformed mass,gave deformation structural plane and computing parameters,and took the parameters carried out stability checking computations.The result has demonstrated that the I―I and III―III sections of slump mass stand in understable state,while the II―II section in stable state,as a whole in understable state.The study result has been verified in July 2009 slump deformed mass rejuvenated deformation.
引文
[1]范立民,何进军,李存购.秦巴山区滑坡发育规律研究[J].中国地质灾害与防治学报,2004,15(1):44-48.
[2]陈照雄.滑坡抢险应急治理方案及效果探析[J].中国煤炭地质,2010,22(11):57-59.
[3]苏武彪,张庆华,潘海潮.山区公路边坡水的防治探讨[J].中国煤炭地质,2008,20(9):43-46.
[4]王念秦,樊珂奇.滑坡灾害稳定度综合评判模型[J].水文地质工程地质,2011,38(1):114-117,122.
[5]徐青,陈士军,陈胜宏.滑坡稳定性分析与安全系数取值研究[J].中国地质灾害与防治学报,2006,17(3):58-62.
[6]杨光辉,刘新.简述滑坡稳定计算参数的影响因素[J].中国煤炭地质,2009,21(S2):57-59,62.
[7]《工程地质手册》编委会.工程地质手册[M].北京:中国建筑工业出版社,2007.
[8]中华人民共和国住房和城乡建设部中华人民共和国国家质量监督检验检疫总局.GB50487-99水利水电工程地质勘察规范[S].北京:中国计划出版社,2009.
[2]陈照雄.滑坡抢险应急治理方案及效果探析[J].中国煤炭地质,2010,22(11):57-59.
[3]苏武彪,张庆华,潘海潮.山区公路边坡水的防治探讨[J].中国煤炭地质,2008,20(9):43-46.
[4]王念秦,樊珂奇.滑坡灾害稳定度综合评判模型[J].水文地质工程地质,2011,38(1):114-117,122.
[5]徐青,陈士军,陈胜宏.滑坡稳定性分析与安全系数取值研究[J].中国地质灾害与防治学报,2006,17(3):58-62.
[6]杨光辉,刘新.简述滑坡稳定计算参数的影响因素[J].中国煤炭地质,2009,21(S2):57-59,62.
[7]《工程地质手册》编委会.工程地质手册[M].北京:中国建筑工业出版社,2007.
[8]中华人民共和国住房和城乡建设部中华人民共和国国家质量监督检验检疫总局.GB50487-99水利水电工程地质勘察规范[S].北京:中国计划出版社,2009.
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