基于变形响应率的路堑边坡失稳预报研究
|
摘要
岩土体的变形可以视为广义荷载作用下的响应,在布置了大量位移观测仪器的边坡上选择变形稳定的测点为参考点,将参考点的位移变化视为荷载变化过程。计算出边坡其余部位的测点相对于参考点的变形响应率,通过响应率的变化趋势来判断边坡不同部位的稳定状况。当响应率较小时,说明变形正常;若某测点的响应率突然增加,说明该位置很有可能发生局部失稳破坏。通过对某高速公路沿线路堑高边坡的实例研究表明,变形响应率的波动情况与边坡实际状态的变化基本一致,响应率大的部位发生了塌滑。
The deformation of soil mass can be regarded as the response under generalized load.The monitoring point in stable state on cut slope equipped with large amount of displacement surveying apparatuses was chosen as reference point,and the deformation of reference point reflects the change of load.By comparing the displacement change of other monitoring points with the reference point,the deformation response ration was obtained to determine the stable status of different cut slope positions.The result shows that(1) when the response ration is small,the position of slope is in normal state;(2) when the response ration fluctuates intensely,local collapse may occur.The research of cut slope of an expressway indicates that the change of deformation response ratio is in concordance with the actual stability of slope and the local collapse happens on position where the response ratio is abnormal.
The deformation of soil mass can be regarded as the response under generalized load.The monitoring point in stable state on cut slope equipped with large amount of displacement surveying apparatuses was chosen as reference point,and the deformation of reference point reflects the change of load.By comparing the displacement change of other monitoring points with the reference point,the deformation response ration was obtained to determine the stable status of different cut slope positions.The result shows that(1) when the response ration is small,the position of slope is in normal state;(2) when the response ration fluctuates intensely,local collapse may occur.The research of cut slope of an expressway indicates that the change of deformation response ratio is in concordance with the actual stability of slope and the local collapse happens on position where the response ratio is abnormal.
引文
[1]崔政权,李宁.边坡工程——理论与实践最新发展[M].北京:中国水利水电出版社,1999.CUI Zheng-quan,LI Ning.Slope Engineering:Progress inTheory and Practice[M].Beijing:China Water PowerPress,1999.
[2]周维垣.岩石高边坡的稳定与治理,岩土工程的回顾与前瞻[M].北京:人民交通出版社,2001.ZHOU Wei-yuan.The Stability and Treatment of High RockSlope,Review and Outlook of Geoengineering[M].Beijing:China communications Press,2001.
[3]郑东健,顾冲时,吴中如.边坡变形的多因素时变预测模型[J].岩石力学与工程学报,2005,24(17):3180-3 184.ZHENG Dong-jian,GU Chong-shi,WU Zhong-ru.Time Se-ries Evolution Forecasting Model of Slope Deformation Based onMultiple Factors[J].Chinese Journal of Rock Mechanics andEngineering,2005,24(17):3 180-3 184.
[4]苏忖安,盛松涛,陈红萍.边坡位移预测的混沌时间序列分析方法应用研究[J].中南公路工程,2006,31(6):5-7.SU Cun-an,SHENG Song-tao,CHEN Hong-ping.The Appli-cation Research of Slope Displacement Forecasting by ChaosTime Series[J].Central South Highway Engineering,2006,31(6):5-7.
[5]刘立平,姜德义,郑硕才,等.边坡稳定性分析方法的最新进展[J].重庆大学学报(自然科学版),2000,23(3):115-118.LIU Li-ping,JIANG De-yi,ZHENG Shuo-cai,et al.TheRecent Progress of the Slope Stability Analysis Methods[J].Journal of Chongqing University(Natural Science Edition),2000,23(3):115-118.
[6]CHENG Y M,LANSIVAARA T,WEI W B.Two-dimensionalSlope Stability Analysis by Limit Equilibrium and Strength Re-duction Methods[J].Computers and Geotechnics,2007,34:137-150.
[7]贾娟,汪益敏,林叔忠.不良地质路堑高边坡的施工模拟与监测分析[J].岩石力学与工程学报,2005,24(22):4 106-4 110.JIA Juan,WANG Yi-min,LIN Shu-zhong.Construction Simu-lation and Monitoring Data Analysis of High Cut Slope withFaulty Geology[J].Chinese Journal of Rock Mechanics andEngineering,2005,24(22):4 106-4 110.
[8]CHENG Min-yuan,CHIEN H K.Computer-aided DecisionSupport System for Hillside Safety Monitoring[J].Automationin Construction,2002,11:453-466.
[9]许强,黄润秋.用加卸载响应比理论探讨斜坡失稳前兆[J].中国地质灾害与防治学报,1995,6(2):25-30.XU Qiang,HUANG Run-qiu.Studies on the Precusor of SlopeInstability Applying to the Load-unload Response Ratio Theory[J].The Chinese Journal of Geological Hazard and Control,1995,6(2):25-30.
[10]姜彤,马莎,许兵,等.边坡在地震作用下的加卸载响应规律研究[J].岩石力学与工程学报,2004,23(22):3 803-3 807.JIANG Tong,MA Sha,XU Bing,et al.Study on Laws ofLoad-unload Response of Slope under Seismic Load[J].Ch-inese Journal of Rock Mechanics and Engineering,2004,23(22):3 803-3 807.
[11]王裕仓,尹祥础,彭克银,等.加卸载响应比的数值模拟[J].地球物理学报,1999,42(5):669-676.WANG Yu-cang,YIN Xiang-chu,PENG Ke-yin,et al.Nu-merical Simulation on Load/unload Response Ratio Theory[J].Chinese Journal of Geophysics,1999,42(5):669-676.
[12]张文杰,陈云敏,贺可强.加卸载响应比理论应用于堆积层滑坡预报[J].自然灾害学报,2005,14(5):79-83.ZHANG Wen-jie,CHEN Yun-min,HE Ke-qiang.Applicationof Loading/unloading Response Ratio Theory to Prediction ofAccumulative Landslides[J].Natural Disaster Journal,2005,14(5):79-83.
[2]周维垣.岩石高边坡的稳定与治理,岩土工程的回顾与前瞻[M].北京:人民交通出版社,2001.ZHOU Wei-yuan.The Stability and Treatment of High RockSlope,Review and Outlook of Geoengineering[M].Beijing:China communications Press,2001.
[3]郑东健,顾冲时,吴中如.边坡变形的多因素时变预测模型[J].岩石力学与工程学报,2005,24(17):3180-3 184.ZHENG Dong-jian,GU Chong-shi,WU Zhong-ru.Time Se-ries Evolution Forecasting Model of Slope Deformation Based onMultiple Factors[J].Chinese Journal of Rock Mechanics andEngineering,2005,24(17):3 180-3 184.
[4]苏忖安,盛松涛,陈红萍.边坡位移预测的混沌时间序列分析方法应用研究[J].中南公路工程,2006,31(6):5-7.SU Cun-an,SHENG Song-tao,CHEN Hong-ping.The Appli-cation Research of Slope Displacement Forecasting by ChaosTime Series[J].Central South Highway Engineering,2006,31(6):5-7.
[5]刘立平,姜德义,郑硕才,等.边坡稳定性分析方法的最新进展[J].重庆大学学报(自然科学版),2000,23(3):115-118.LIU Li-ping,JIANG De-yi,ZHENG Shuo-cai,et al.TheRecent Progress of the Slope Stability Analysis Methods[J].Journal of Chongqing University(Natural Science Edition),2000,23(3):115-118.
[6]CHENG Y M,LANSIVAARA T,WEI W B.Two-dimensionalSlope Stability Analysis by Limit Equilibrium and Strength Re-duction Methods[J].Computers and Geotechnics,2007,34:137-150.
[7]贾娟,汪益敏,林叔忠.不良地质路堑高边坡的施工模拟与监测分析[J].岩石力学与工程学报,2005,24(22):4 106-4 110.JIA Juan,WANG Yi-min,LIN Shu-zhong.Construction Simu-lation and Monitoring Data Analysis of High Cut Slope withFaulty Geology[J].Chinese Journal of Rock Mechanics andEngineering,2005,24(22):4 106-4 110.
[8]CHENG Min-yuan,CHIEN H K.Computer-aided DecisionSupport System for Hillside Safety Monitoring[J].Automationin Construction,2002,11:453-466.
[9]许强,黄润秋.用加卸载响应比理论探讨斜坡失稳前兆[J].中国地质灾害与防治学报,1995,6(2):25-30.XU Qiang,HUANG Run-qiu.Studies on the Precusor of SlopeInstability Applying to the Load-unload Response Ratio Theory[J].The Chinese Journal of Geological Hazard and Control,1995,6(2):25-30.
[10]姜彤,马莎,许兵,等.边坡在地震作用下的加卸载响应规律研究[J].岩石力学与工程学报,2004,23(22):3 803-3 807.JIANG Tong,MA Sha,XU Bing,et al.Study on Laws ofLoad-unload Response of Slope under Seismic Load[J].Ch-inese Journal of Rock Mechanics and Engineering,2004,23(22):3 803-3 807.
[11]王裕仓,尹祥础,彭克银,等.加卸载响应比的数值模拟[J].地球物理学报,1999,42(5):669-676.WANG Yu-cang,YIN Xiang-chu,PENG Ke-yin,et al.Nu-merical Simulation on Load/unload Response Ratio Theory[J].Chinese Journal of Geophysics,1999,42(5):669-676.
[12]张文杰,陈云敏,贺可强.加卸载响应比理论应用于堆积层滑坡预报[J].自然灾害学报,2005,14(5):79-83.ZHANG Wen-jie,CHEN Yun-min,HE Ke-qiang.Applicationof Loading/unloading Response Ratio Theory to Prediction ofAccumulative Landslides[J].Natural Disaster Journal,2005,14(5):79-83.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心