桂东南花岗岩残坡积土边坡破坏特征与防治对策
|
摘要
桂东南花岗岩残坡积土边坡雨季频繁失稳破坏,严重威胁着当地居民的生命财产与工程安全,制约区域经济社会的发展。为了探明该类边坡的破坏特征,采用现场调研与统计分析相结合的方法,分析了花岗岩残坡积土边坡的破坏模型与特征,探讨边坡稳定性的主要影响因素,在此基础上提出针对性的防治对策。研究结果表明:桂东南花岗岩残坡积土边坡的破坏类型分别是滑坡、崩塌、坡面泥石流、复合型,边坡稳定性的主控因素包括残坡积土的力学性质、结构面、人工切坡与降雨。防治设计宜分别针对自然边坡与人工边坡来开展,对于已经破坏的自然边坡和人工边坡,防治重点是对裸露的滑床进行及时防护;对于正处于变形阶段的人工边坡,防治宜根据坡体结构、边坡稳定性、潜在的破坏类型与特征来采取针对性措施。
The failures of granite residual soil slopes in the southeast of Guangxi Province are characterized with the frequent occurrence in rainy season,thus posing the great threats to the local residents of life,property and engineering safety,meanwhile,hindering the regional economic development. In order to understand the failure characteristics of granite residual soil slope,field surveys and statistical analysis were used to analyze the failure types,features,and the major influencing factors of slope stability. Then the corresponding prevention measures were given in this paper. Results show that four failure types of granite residual soil slopes are summarized as landslide,collapse,slope mudslides and composite failure. The main control factors of slope stability include mechanical properties,structure plane,artificial slope cutting and rainfall. Based on the nature slope and artificial slope,prevention and control design should be carried out. The prevention measure for destroyed nature and artificial slope focuses on the protection on the bare sliding bed.For preventing the unstable artificial slope,structure of slope,slope stability,potential failure types and characteristics of slope should be taken into account.
The failures of granite residual soil slopes in the southeast of Guangxi Province are characterized with the frequent occurrence in rainy season,thus posing the great threats to the local residents of life,property and engineering safety,meanwhile,hindering the regional economic development. In order to understand the failure characteristics of granite residual soil slope,field surveys and statistical analysis were used to analyze the failure types,features,and the major influencing factors of slope stability. Then the corresponding prevention measures were given in this paper. Results show that four failure types of granite residual soil slopes are summarized as landslide,collapse,slope mudslides and composite failure. The main control factors of slope stability include mechanical properties,structure plane,artificial slope cutting and rainfall. Based on the nature slope and artificial slope,prevention and control design should be carried out. The prevention measure for destroyed nature and artificial slope focuses on the protection on the bare sliding bed.For preventing the unstable artificial slope,structure of slope,slope stability,potential failure types and characteristics of slope should be taken into account.
引文
[1]翟国军.广西花岗岩地区地质灾害防治研究报告[R].广西地质环境监测总站,2013.
[2]陈立华,马少坤,廖丽萍等.广西花岗岩残积土滑坡灾害在线预警系统开发与应用研究[R].广西大学土木建筑工程学院,2014.
[3]王辉.珠三角花岗岩残积土边坡稳定性分析及非线性预测[D].2011,吉林大学.
[4]赵晓彦.类土质边坡特性及其锚固设计理论研究[D].2005,西南交通大学.
[5]黄欢.广东番禺市花岗岩残积土的工程地质特征及其应用[J].水文地质工程地质,2000,27(3):38-39.
[6]莫继军.梧州市花岗岩残积土的工程特性[J].广西城镇建设,2005,(7):18-20.
[7]吴能森.花岗岩残积土开挖边坡的工程特性[J].山地学报,2006,24(4):431-436.
[8]黄少强.G323国道改造工程花岗岩类风化土体性质研究[J].四川建筑,2012,32(4):154,158.
[9]陈玮,简文彬,董岩松,等.软弱结构面对花岗岩残积土边坡稳定性影响[J].中国地质灾害与防治学报,2015,26(1):23-30.
[10]阮林龙,叶兴军.花岗岩残积土边坡破坏及防护[J].岩土工程界,2009,12(12):61-64.
[11]曾朋.花岗岩残积土的压实特性及崩解特性研究[D].2012,华南理工大学.
[12]兰泽鑫.花岗岩残积土崩解试验研究[D].2013,华南理工大学.
[13]张抒,唐辉明.非饱和花岗岩残积土崩解机制试验研究[J].岩土力学,2013,34(6):1668-1674.
[14]赵晓彦,黄少强,胡厚田.花岗岩类土质边坡特性及其组合锚固设计[M].2012,北京:人民交通出版社.
[15]杨明,王波,胡厚田.类土质边坡特征的初步探讨[J].水土保持学报,2002,16(6):110-112,135.
[16]赵晓彦,胡厚田.用离心模型试验研究花岗岩残积土边坡的破坏特性[J].工程地质学报,2005,13(3):410-414.
[17]陈志新,赵晓彦.花岗岩类土质高边坡破坏方式研究[J].路基工程,2010,(4):149-150.
[18]赵晓彦,胡厚田,唐茂颖.类土质高边坡开挖效应的离心模型试验及数值模拟研究[J].岩石力学与工程学报,2006,25(S2):4046-4051.
[19]胡厚田,王安福,刘涌江,等.花岗岩类土质高边坡稳定性研究[J].岩土工程学报,2009,31(6):824-828.
[20]何珊儒,陈仕龙,钟志芳.花岗岩风化岩残积土斜坡病害的分析研究[J].边坡工程,2006,9(6):56-59.
[21]胡勇林,陈明璐,刘国忠.近10年桂东南区域持续性暴雨统计分析[J].气象研究与应用,2011,32(S2):61-62.
[22]Kim J,Jeong S,Park S,et al.Influence of rainfall-induced wetting on the stability of slopes in weathered soils[J].Engineering Geology,2004,75(3-4):251-262.
[23]Dahal R K,Hasegawa S,Nonomura A,et al.Failure characteristics of rainfall-induced shallow landslides in granitic terrains of Shikoku Island of Japan[J].Environmental Geology,2008,56(7):1295-1310.
[24]Kim C K,Kim T H.Behavior of unsaturated weathered residual granite soil with initial water contents[J].Engineering Geology,2010,113(1-4):1-10.
[25]Muhammad M,Mohd R T,Ken I K.Numerical analysis of effective soil porosity and soil thickness effects on slope stability at a hillslope of weathered granitic soil formation[J].Geosciences Journal,2008,12(4):401-410.
[26]廖小平.类土质路堑边坡变形破坏类型及其稳定性分析[J].岩土力学与工程学报,2003,22(S2):2765-2772.
[27]Jiao J J,Wang X S,Nandy S.Confined groundwater zone and slope instability in weathered igneous rocks in Hong Kong[J].Engineering Geology,2005,80(1-2):71-92.
[28]Calcaterra D,Parise M.Landslide types and their relationships with weathering in a Calabrian basin,southern Italy[J].Bulletin of Engineering Geology and the Environment,2005,64(2):193-207.
[29]徐晶,李伟华.台风强降雨诱发地质灾害的雨量特征分析[J].气象,2009,35(8):42-48.
[30]黄永森,林宝婷.桂东南“6.28”大暴雨触发机制分析[J].气象研究与应用,2012,33(1):10-12.
[31]胡勇林,林宝亭,陆秋霖,等.桂东南“6.23”特大暴雨天气过程分析[J].安徽农业科学,2013,41(3):1220-1222,1228.
[32]隋志龙,黄春霞,陈国兴,等.恭城-栗木断裂带活动特征及其与地质灾害的关系[J].自然灾害学报,2009,18(2):160-166.
[33]戴福初,陈守义,李焯芬.从土的应力应变特性探讨滑坡发生机理[J].岩土工程学报,2000,22(1):127-130.
[34]汤连生,桑海涛,宋晶,等.非饱和花岗岩残积土粒间联结作用与脆弹塑性胶结损伤模型研究[J].岩土力学,2013,34(10):2877-2888.
[2]陈立华,马少坤,廖丽萍等.广西花岗岩残积土滑坡灾害在线预警系统开发与应用研究[R].广西大学土木建筑工程学院,2014.
[3]王辉.珠三角花岗岩残积土边坡稳定性分析及非线性预测[D].2011,吉林大学.
[4]赵晓彦.类土质边坡特性及其锚固设计理论研究[D].2005,西南交通大学.
[5]黄欢.广东番禺市花岗岩残积土的工程地质特征及其应用[J].水文地质工程地质,2000,27(3):38-39.
[6]莫继军.梧州市花岗岩残积土的工程特性[J].广西城镇建设,2005,(7):18-20.
[7]吴能森.花岗岩残积土开挖边坡的工程特性[J].山地学报,2006,24(4):431-436.
[8]黄少强.G323国道改造工程花岗岩类风化土体性质研究[J].四川建筑,2012,32(4):154,158.
[9]陈玮,简文彬,董岩松,等.软弱结构面对花岗岩残积土边坡稳定性影响[J].中国地质灾害与防治学报,2015,26(1):23-30.
[10]阮林龙,叶兴军.花岗岩残积土边坡破坏及防护[J].岩土工程界,2009,12(12):61-64.
[11]曾朋.花岗岩残积土的压实特性及崩解特性研究[D].2012,华南理工大学.
[12]兰泽鑫.花岗岩残积土崩解试验研究[D].2013,华南理工大学.
[13]张抒,唐辉明.非饱和花岗岩残积土崩解机制试验研究[J].岩土力学,2013,34(6):1668-1674.
[14]赵晓彦,黄少强,胡厚田.花岗岩类土质边坡特性及其组合锚固设计[M].2012,北京:人民交通出版社.
[15]杨明,王波,胡厚田.类土质边坡特征的初步探讨[J].水土保持学报,2002,16(6):110-112,135.
[16]赵晓彦,胡厚田.用离心模型试验研究花岗岩残积土边坡的破坏特性[J].工程地质学报,2005,13(3):410-414.
[17]陈志新,赵晓彦.花岗岩类土质高边坡破坏方式研究[J].路基工程,2010,(4):149-150.
[18]赵晓彦,胡厚田,唐茂颖.类土质高边坡开挖效应的离心模型试验及数值模拟研究[J].岩石力学与工程学报,2006,25(S2):4046-4051.
[19]胡厚田,王安福,刘涌江,等.花岗岩类土质高边坡稳定性研究[J].岩土工程学报,2009,31(6):824-828.
[20]何珊儒,陈仕龙,钟志芳.花岗岩风化岩残积土斜坡病害的分析研究[J].边坡工程,2006,9(6):56-59.
[21]胡勇林,陈明璐,刘国忠.近10年桂东南区域持续性暴雨统计分析[J].气象研究与应用,2011,32(S2):61-62.
[22]Kim J,Jeong S,Park S,et al.Influence of rainfall-induced wetting on the stability of slopes in weathered soils[J].Engineering Geology,2004,75(3-4):251-262.
[23]Dahal R K,Hasegawa S,Nonomura A,et al.Failure characteristics of rainfall-induced shallow landslides in granitic terrains of Shikoku Island of Japan[J].Environmental Geology,2008,56(7):1295-1310.
[24]Kim C K,Kim T H.Behavior of unsaturated weathered residual granite soil with initial water contents[J].Engineering Geology,2010,113(1-4):1-10.
[25]Muhammad M,Mohd R T,Ken I K.Numerical analysis of effective soil porosity and soil thickness effects on slope stability at a hillslope of weathered granitic soil formation[J].Geosciences Journal,2008,12(4):401-410.
[26]廖小平.类土质路堑边坡变形破坏类型及其稳定性分析[J].岩土力学与工程学报,2003,22(S2):2765-2772.
[27]Jiao J J,Wang X S,Nandy S.Confined groundwater zone and slope instability in weathered igneous rocks in Hong Kong[J].Engineering Geology,2005,80(1-2):71-92.
[28]Calcaterra D,Parise M.Landslide types and their relationships with weathering in a Calabrian basin,southern Italy[J].Bulletin of Engineering Geology and the Environment,2005,64(2):193-207.
[29]徐晶,李伟华.台风强降雨诱发地质灾害的雨量特征分析[J].气象,2009,35(8):42-48.
[30]黄永森,林宝婷.桂东南“6.28”大暴雨触发机制分析[J].气象研究与应用,2012,33(1):10-12.
[31]胡勇林,林宝亭,陆秋霖,等.桂东南“6.23”特大暴雨天气过程分析[J].安徽农业科学,2013,41(3):1220-1222,1228.
[32]隋志龙,黄春霞,陈国兴,等.恭城-栗木断裂带活动特征及其与地质灾害的关系[J].自然灾害学报,2009,18(2):160-166.
[33]戴福初,陈守义,李焯芬.从土的应力应变特性探讨滑坡发生机理[J].岩土工程学报,2000,22(1):127-130.
[34]汤连生,桑海涛,宋晶,等.非饱和花岗岩残积土粒间联结作用与脆弹塑性胶结损伤模型研究[J].岩土力学,2013,34(10):2877-2888.