桩板墙结构加固边坡的稳定性分析
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摘要
为探讨桩板墙加固边坡的稳定性,根据多块体滑移理论,采用极限分析上限定理,导出了为保证边坡稳定桩板墙结构中抗滑桩应提供的抗力的计算公式,提出了桩板墙结构加固边坡稳定性的一种新的分析方法.用该方法对算例进行了分析,并与旋转破坏模型获得的结果进行了比较.研究结果表明:桩板墙结构中,抗滑桩应提供的抗力随边坡坡角增大而增大,随坡体材料抗剪强度增大而减小;边坡潜在滑移面埋深随坡体抗剪强度增大变浅;按新方法得到的潜在滑移面比基于旋转破坏模型获得的潜在滑移面更危险.
In order to analyze the stability of a slope reinforced with sheet pile wall,based on the multi-wedge translation mechanism the upper bound method was applied to derive the expressions to calculate needed lateral force acting on piles to guarantee the stability of a slope. A new method was presented to analyze the stability of slopes reinforced with sheet pile wall. In addition,an example was given to illustrate the presented method,and the results were compared with those obtained using the rotation failure mechanism. The research results show that needed lateral force acting on piles increases as slope angle increases,and decrease as soil strength increases. The potential sliding surface becomes increasingly shallow as soil strength increases,and the potential sliding surface obtained using the presented method is more critical than that obtained using the rotation failure mechanism.
In order to analyze the stability of a slope reinforced with sheet pile wall,based on the multi-wedge translation mechanism the upper bound method was applied to derive the expressions to calculate needed lateral force acting on piles to guarantee the stability of a slope. A new method was presented to analyze the stability of slopes reinforced with sheet pile wall. In addition,an example was given to illustrate the presented method,and the results were compared with those obtained using the rotation failure mechanism. The research results show that needed lateral force acting on piles increases as slope angle increases,and decrease as soil strength increases. The potential sliding surface becomes increasingly shallow as soil strength increases,and the potential sliding surface obtained using the presented method is more critical than that obtained using the rotation failure mechanism.
引文
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[11]罗渝,何思明,欧阳朝军,等.地震作用下桩锚组合结构加固边坡稳定性分析[J].四川大学学报:工程科学版,2010,42(增刊1):93-99.LUO Yu,HE Siming,OUYANG Chaojun,et al.Stability analysis of pile and anchor composite structure reinforced slope under the earthquake loading[J].Journal of Sichuan University:Engineering Science Edition,2010,42(Sup.1):93-99.
[12]何思明,张晓曦,欧阳朝军.基于非线性破坏准则超前支护桩加固高切坡的静动稳定分析[J].工程力学,2011,28(12):119-125.HE Siming,ZHANG Xiaoxi,OUYANG Chaojun.Static-dynamic stability of pre-piled for high cutting slope with nonlinear failure criterion[J].Engineering Mechanics,2011,28(12):119-125.
[13]罗渝,许强,何思明,等.重力式挡墙加固边坡的动力稳定性分析[J].工程力学,2013,30(9):132-138.LUO Yu,XU Qiang,HE Siming,et al.Stability analysis of slopes reinforced with gravity walls under the earthquake loading[J].Engineering Mechanics,2013,30(9):132-138.
[14]陈祖煜.土力学经典问题的极限分析上、下限解[J].岩土工程学报,2002,24(1):1-11.CHEN Zuyu.Limit analysis for the classic problems of soil mechanics[J].Chinese Journal of Geotechnical Engineering,2002,24(1):1-11.
[2]MICHALOWSKI R L.Slope stability analysis:a kinematical approach[J].Geotechnique,1995,45(2):283-293.
[3]CHEN W F.极限分析与土体塑性[M].詹世斌,译.北京:人民交通出版社,1995:28-60.
[4]AUSILIO E,CONTE E,DUENTE G.Stability analysis of slopes reinforced with piles[J].Computers and Geotechnics,2001,28(8):591-611.
[5]DONALD I,CHEN Z Y.Slope stability analysis by the upper bound approach:fundamentals and methods[J].Canadian Geotechnical Journal,1997,34(6):853-862.
[6]刘小丽,周德培.有软弱夹层岩体边坡的稳定性评价[J].西南交通大学学报,2002,47(4):382-386.LIU Xiaoli,ZHOU Depei.Stability evaluation of rock mass slope with weak intercalated layers[J].Journal of Southwest Jiaotong University,2002,47(4):382-386.
[7]JEONG S,KIM B,WON J,et al.Uncoupled analysis of stabilizing piles in weathered slopes[J].Computers and Geotechnics,2003,30(8):671-682.
[8]LI X P,WU Y,HE S M.Seismic stability analysis of gravity retaining walls[J].Soil Dynamics and Earthquake Engineering,2010,30(10):875-878.
[9]HE S M,OUYANG C J,LUO Y.Seismic stability analysis of soil nail reinforced slope using kinematic approach of limit analysis[J].Environmental Earth Sciences,2012,66(1):319-326.
[10]LI X P,PEI X J,GUTIERREZ M,et al.Optimal location of piles in slope stabilization by limit analysis[J].Acta Geotechnica,2012,7(3):253-259.
[11]罗渝,何思明,欧阳朝军,等.地震作用下桩锚组合结构加固边坡稳定性分析[J].四川大学学报:工程科学版,2010,42(增刊1):93-99.LUO Yu,HE Siming,OUYANG Chaojun,et al.Stability analysis of pile and anchor composite structure reinforced slope under the earthquake loading[J].Journal of Sichuan University:Engineering Science Edition,2010,42(Sup.1):93-99.
[12]何思明,张晓曦,欧阳朝军.基于非线性破坏准则超前支护桩加固高切坡的静动稳定分析[J].工程力学,2011,28(12):119-125.HE Siming,ZHANG Xiaoxi,OUYANG Chaojun.Static-dynamic stability of pre-piled for high cutting slope with nonlinear failure criterion[J].Engineering Mechanics,2011,28(12):119-125.
[13]罗渝,许强,何思明,等.重力式挡墙加固边坡的动力稳定性分析[J].工程力学,2013,30(9):132-138.LUO Yu,XU Qiang,HE Siming,et al.Stability analysis of slopes reinforced with gravity walls under the earthquake loading[J].Engineering Mechanics,2013,30(9):132-138.
[14]陈祖煜.土力学经典问题的极限分析上、下限解[J].岩土工程学报,2002,24(1):1-11.CHEN Zuyu.Limit analysis for the classic problems of soil mechanics[J].Chinese Journal of Geotechnical Engineering,2002,24(1):1-11.
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