锚固边坡地震动力稳定性计算方法
|
摘要
建立了均匀弹性土体边坡静力和动力简化计算模型,求解了边坡静力和动力应力场。锚固体系在一定程度上弥补了开挖卸荷引起的侧向应力的减小,将其等效为土体强度的增加。基于似粘聚力原理和极限平衡理论,推导出土体强度增量表达式。根据土体边坡滑动面的破坏模式,建立了考虑锚固作用的边坡动力稳定性计算模型。利用遗传算法对最危险滑移面的圆心进行动态搜索,实现了锚固边坡动力稳定最小安全系数的自动寻优。最后结合具体工程实例进行了分析,并和有限元时程强度折减法进行了对比,结果表明这种计算方法对土质较均匀的黄土地区是可行的。
A static and dynamic simplified calculation model is established for homogeneous soil slope and the analytical solutions are obtained for slope static and dynamic stresses.As the anchorage system makes up for the lateral stress losses caused by the excavation unloading in a certain extent,its strengthening action is equivalent to soil strength increase.Based on the principle of pseudo-cohesion and limit equilibrium theory,the incremental function of strength of soil strengthened by the anchorage system is deduced.According to the soil slope failure mode,the slope dynamic stability calculation model and search model of the slip surface are set up.Dynamically search of the circle center of the most dangerous slip surface is carried out by using the genetic algorithms,to achieve automatic optimization course of the minimum dynamic stability safety coefficient of the anchored slope.Finally,the method is applied to a case record to illustrate its capability,the results show that the proposal method is reliable.
A static and dynamic simplified calculation model is established for homogeneous soil slope and the analytical solutions are obtained for slope static and dynamic stresses.As the anchorage system makes up for the lateral stress losses caused by the excavation unloading in a certain extent,its strengthening action is equivalent to soil strength increase.Based on the principle of pseudo-cohesion and limit equilibrium theory,the incremental function of strength of soil strengthened by the anchorage system is deduced.According to the soil slope failure mode,the slope dynamic stability calculation model and search model of the slip surface are set up.Dynamically search of the circle center of the most dangerous slip surface is carried out by using the genetic algorithms,to achieve automatic optimization course of the minimum dynamic stability safety coefficient of the anchored slope.Finally,the method is applied to a case record to illustrate its capability,the results show that the proposal method is reliable.
引文
[1]黄润秋,李为乐.“5.12”汶川大地震触发地质灾害的发育分布规律研究[J].岩石力学与工程学报,2008,27(12):2 585—2 592.HUANG Runqiu,LI Weile.Research on development and distribution rules of geohazards induced by Wenchuan Earthquake on 12th May,2008[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(12):2 585—2 592.
[2]李忠,朱彦鹏.框架预应力锚杆边坡支护结构稳定性计算方法及其工程应用[J].岩石力学与工程学报,2005,24(21):3 922—3 926.LI Zhong,ZHU Yanpeng.Stability calculation methods for grillage supporting structure with prestressed anchor and its application[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(21):3 922—3 926.
[3]朱彦鹏,李忠.深基坑土钉支护稳定性分析方法的改进及软件开发[J].岩土工程学报,2005,27(8):939—943.ZHU Yanpeng,LI Zhong.Improvement on stability analysis of soil nailing in foundation excavations and its software development[J].Chinese Journal of Geotechnical Engineering,2005,27(8):939—943.
[4]朱彦鹏,魏升华.深基坑支护桩与土相互作用的研究[J].岩土力学,2010,31(9):2 840—2 844.ZHU Yanpeng,WEI Shenghua.Research on interaction between deep excavation supporting pile and soil[J].Chinese Journal of Rock and Soil Mechanics,2010,31(9):2 840—2 844.
[5]金亮星,李建.高速铁路路堑岩质边坡的动力响应分析[J].振动工程学报,2008,21(4):354—358.JIN Liangxing,LI Jian.Dynamic response analysis of cutting rock slope under high speed train vibration load[J].Journal of Vibration Engineering,2008,21(4):354—358.
[6]石玉成,秋仁东,孙军杰,等.地震作用下预应力锚索加固危岩体的动力响应分析[J].岩土力学,2011,32(4):1 157—1 162.SHI Yu-cheng,QIU Ren-dong,SUN Jun-jie,et al.Analysis of dynamic response of dangerous rock mass reinforced by prestressed anchor cables under seismic loads[J].Rock and Soil Mechanics,2011,32(4):1 157—1 162.
[7]董建华.地震作用下土钉支护边坡动力分析与抗震设计方法研究[D].兰州:兰州理工大学,2008.DONG Jian-hua.Study on dynamic analysis and seismic design of slope protected by soil nailing retaining wall under earthquake[D].Lanzhou:Lanzhou University of Technology,2008.
[8]董建华,朱彦鹏.地震作用下土钉支护边坡稳定性分析[J].中国公路学报,2008,21(6):20—25.DONG Jianhua,ZHU Yanpeng.Stability analysis of slope supported by soil nailing retaining wall under earthquake[J].China Journal of Highway and Transport,2008,21(6):20—25.
[9]Turner J P,Jensen W G.Landslide stabilization using soil nail and mechanically stabilized earth walls:Case study[J].J.of Geotech.and Geoenvirn.Eng.,ASCE,2005,131(2):141—150.
[10]COTTON P E,DAVID M,LUARK P F,et al.Seismic response and extended life analysis of the deepest top-down soil nail wall in the U.S[J].Geotechnical Special Publication,2004,124(3):723—740.
[11]吴世明.土介质中的波[M].北京:科学出版社,1997.
[12]李广信.高等土力学[M].北京:清华大学出版社,2004.
[13]陈忠达.公路挡土墙设计[M].北京:人民交通出版社,2004.
[14]徐芝纶.弹性力学[M].北京:高等教育出版社,2006.
[15]顾慰慈.挡土墙土压力计算[M].北京:中国建材工业出版社,2001.
[16]国家标准.《建筑边坡工程技术规范》(GB50330——2002)[S].北京:中国建筑工业出版社,2002.
[17]张志涌.精通MATLAB 6.5版[M].北京:北京航空航天大学出版社,2003.
[18]刘万林,张新燕,晃勤.MATLAB环境下遗传算法优化工具箱的应用[J].新疆大学学报(自然科学版),2005,22(3):357—360.LIU Wan-lin,ZHANG Xin-yan,CHAO Qin.The application of genetic algorithm optimization toolbox in MATLAB[J].Journal of Xinjiang University(Natural Science Edition),2005,22(3):357—360.
[19]贺可强,王胜利,阳吉宝.运用遗传算法求解土钉支护结构的整体稳定性系数[J].岩土力学,2003,24(3):355—358.HE Ke-qiang;WANG Sheng-li;YANG Ji-bao.The research of genetic algorithms applied to solving coefficient of integral stability of soil-nail braced structure[J].Chinese Journal of Rock and Soil Mechanics,2003,24(3):355—358.
[20]叶海林,郑颖人,黄润秋,等.强度折减动力分析法在滑坡抗滑桩抗震设计中的应用研究[J].岩土力学,2010,31(S):317—323.YE Hailin,ZHENG Yingren,HUANG Runqiu,et al.Study of application of strength reduction dynamic analysis method to aseismic design of anti-slide piles for landslide[J].Chinese Journal of Rock and SoilMechanics,2010,31(S):317—323.
[21]叶海林,黄润秋,郑颖人,等.岩质边坡锚杆支护参数地震敏感性分析[J].岩土工程学报,2010,32(9):1 374—1 379.YE Hailin,HUANG Runqiu,ZHENG Yingren,et al.Sensitivity analysis of parameters for bolts in rock slopes under earthquakes[J].Chinese Journal of Geotechnical Engineering,2010,32(9):1 372—1 379.
[22]张燎军,张慧星,王大胜,等.黏弹性人工边界在ADINA中的应用[J].世界地震工程,2008,24(1):12—16.ZHANG Liaojun,ZHANG Huixing,WANG Dasheng et al.The application of artificial viscous-spring boundary in ADINA[J].World Earthquake Engineering,2008,24(1):12—16.
[23]刘晶波,谷音,杜义欣.一致粘弹性人工边界及黏弹性边界单元[J].岩土工程学报,2006,28(9):1 070—1 075.LIU Jingbo,GU Yin,DU Yixin.Consistent viscousspring artificial boundaries and viscous-spring boundary elements[J].Chinese Journal of Geotechnical Engineering,2006,28(9):1 070—1 075.
[2]李忠,朱彦鹏.框架预应力锚杆边坡支护结构稳定性计算方法及其工程应用[J].岩石力学与工程学报,2005,24(21):3 922—3 926.LI Zhong,ZHU Yanpeng.Stability calculation methods for grillage supporting structure with prestressed anchor and its application[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(21):3 922—3 926.
[3]朱彦鹏,李忠.深基坑土钉支护稳定性分析方法的改进及软件开发[J].岩土工程学报,2005,27(8):939—943.ZHU Yanpeng,LI Zhong.Improvement on stability analysis of soil nailing in foundation excavations and its software development[J].Chinese Journal of Geotechnical Engineering,2005,27(8):939—943.
[4]朱彦鹏,魏升华.深基坑支护桩与土相互作用的研究[J].岩土力学,2010,31(9):2 840—2 844.ZHU Yanpeng,WEI Shenghua.Research on interaction between deep excavation supporting pile and soil[J].Chinese Journal of Rock and Soil Mechanics,2010,31(9):2 840—2 844.
[5]金亮星,李建.高速铁路路堑岩质边坡的动力响应分析[J].振动工程学报,2008,21(4):354—358.JIN Liangxing,LI Jian.Dynamic response analysis of cutting rock slope under high speed train vibration load[J].Journal of Vibration Engineering,2008,21(4):354—358.
[6]石玉成,秋仁东,孙军杰,等.地震作用下预应力锚索加固危岩体的动力响应分析[J].岩土力学,2011,32(4):1 157—1 162.SHI Yu-cheng,QIU Ren-dong,SUN Jun-jie,et al.Analysis of dynamic response of dangerous rock mass reinforced by prestressed anchor cables under seismic loads[J].Rock and Soil Mechanics,2011,32(4):1 157—1 162.
[7]董建华.地震作用下土钉支护边坡动力分析与抗震设计方法研究[D].兰州:兰州理工大学,2008.DONG Jian-hua.Study on dynamic analysis and seismic design of slope protected by soil nailing retaining wall under earthquake[D].Lanzhou:Lanzhou University of Technology,2008.
[8]董建华,朱彦鹏.地震作用下土钉支护边坡稳定性分析[J].中国公路学报,2008,21(6):20—25.DONG Jianhua,ZHU Yanpeng.Stability analysis of slope supported by soil nailing retaining wall under earthquake[J].China Journal of Highway and Transport,2008,21(6):20—25.
[9]Turner J P,Jensen W G.Landslide stabilization using soil nail and mechanically stabilized earth walls:Case study[J].J.of Geotech.and Geoenvirn.Eng.,ASCE,2005,131(2):141—150.
[10]COTTON P E,DAVID M,LUARK P F,et al.Seismic response and extended life analysis of the deepest top-down soil nail wall in the U.S[J].Geotechnical Special Publication,2004,124(3):723—740.
[11]吴世明.土介质中的波[M].北京:科学出版社,1997.
[12]李广信.高等土力学[M].北京:清华大学出版社,2004.
[13]陈忠达.公路挡土墙设计[M].北京:人民交通出版社,2004.
[14]徐芝纶.弹性力学[M].北京:高等教育出版社,2006.
[15]顾慰慈.挡土墙土压力计算[M].北京:中国建材工业出版社,2001.
[16]国家标准.《建筑边坡工程技术规范》(GB50330——2002)[S].北京:中国建筑工业出版社,2002.
[17]张志涌.精通MATLAB 6.5版[M].北京:北京航空航天大学出版社,2003.
[18]刘万林,张新燕,晃勤.MATLAB环境下遗传算法优化工具箱的应用[J].新疆大学学报(自然科学版),2005,22(3):357—360.LIU Wan-lin,ZHANG Xin-yan,CHAO Qin.The application of genetic algorithm optimization toolbox in MATLAB[J].Journal of Xinjiang University(Natural Science Edition),2005,22(3):357—360.
[19]贺可强,王胜利,阳吉宝.运用遗传算法求解土钉支护结构的整体稳定性系数[J].岩土力学,2003,24(3):355—358.HE Ke-qiang;WANG Sheng-li;YANG Ji-bao.The research of genetic algorithms applied to solving coefficient of integral stability of soil-nail braced structure[J].Chinese Journal of Rock and Soil Mechanics,2003,24(3):355—358.
[20]叶海林,郑颖人,黄润秋,等.强度折减动力分析法在滑坡抗滑桩抗震设计中的应用研究[J].岩土力学,2010,31(S):317—323.YE Hailin,ZHENG Yingren,HUANG Runqiu,et al.Study of application of strength reduction dynamic analysis method to aseismic design of anti-slide piles for landslide[J].Chinese Journal of Rock and SoilMechanics,2010,31(S):317—323.
[21]叶海林,黄润秋,郑颖人,等.岩质边坡锚杆支护参数地震敏感性分析[J].岩土工程学报,2010,32(9):1 374—1 379.YE Hailin,HUANG Runqiu,ZHENG Yingren,et al.Sensitivity analysis of parameters for bolts in rock slopes under earthquakes[J].Chinese Journal of Geotechnical Engineering,2010,32(9):1 372—1 379.
[22]张燎军,张慧星,王大胜,等.黏弹性人工边界在ADINA中的应用[J].世界地震工程,2008,24(1):12—16.ZHANG Liaojun,ZHANG Huixing,WANG Dasheng et al.The application of artificial viscous-spring boundary in ADINA[J].World Earthquake Engineering,2008,24(1):12—16.
[23]刘晶波,谷音,杜义欣.一致粘弹性人工边界及黏弹性边界单元[J].岩土工程学报,2006,28(9):1 070—1 075.LIU Jingbo,GU Yin,DU Yixin.Consistent viscousspring artificial boundaries and viscous-spring boundary elements[J].Chinese Journal of Geotechnical Engineering,2006,28(9):1 070—1 075.
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