黏性土挡土墙在地震作用下被动土压力研究
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摘要
在非地震主动土压力公式的基础上,用微分薄层法给出了地震条件下被动土压力公式,其中填土面倾斜、墙背倾斜、填土为c～土、墙背与填土间同时存在c～φ作用、墙后破裂体存在水平向和竖向的地震加速度,目前所见的地震情况下和非地震情况下的被动土压力公式均是本文公式的特例。对上述同一条件下的挡墙用过墙锺的整块破裂体作静力平衡分析(如库仑分析)得到的总土压力与本文微分薄层法得到的总土压力,大小相等,但作用点位置本法明显增加,由此理论和很多实验得知,设计抗震和非抗震时的很多类挡墙要引起足够的重视。
On the foundation of non-seismic active earth pressure theory,the seismic passive earth pressure formula,in the condition of filling surface incline,wall back incline,filling soil having the characteristic of c and at the same time,and having the c and action between the wall back and filling soil,the filling soil having horizontal and vertical acceleration,were obtained with differential layer method,these formula included its distribution and total force.At present time,every passive earth pressure formula in earthquake and non-earthquake condition is the special example of this paper.The total earth pressure obtained with differential layer method and other method such as Coulomb's earth wedge equilibrium method,is the same,but the action pot of total force often raised up,therefore,in the design of retaining wall we should pay enough attention to this aspect.
On the foundation of non-seismic active earth pressure theory,the seismic passive earth pressure formula,in the condition of filling surface incline,wall back incline,filling soil having the characteristic of c and at the same time,and having the c and action between the wall back and filling soil,the filling soil having horizontal and vertical acceleration,were obtained with differential layer method,these formula included its distribution and total force.At present time,every passive earth pressure formula in earthquake and non-earthquake condition is the special example of this paper.The total earth pressure obtained with differential layer method and other method such as Coulomb's earth wedge equilibrium method,is the same,but the action pot of total force often raised up,therefore,in the design of retaining wall we should pay enough attention to this aspect.
引文
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[2]高江平.粘性土被动土压力计算方法的探讨[J].重庆交通学院学报,1997,16(2):108-113.(Gao Jian-gping.The study on the passive earth pressure’s calcu-lating method of clay soil[J].Journal of ChongqingJiaotong Institute,1997,16(2):108-113.(in Chi-nese))
[3]杨剑.地震条件下倾斜挡土墙被动土压力研究[J].岩土工程学报,2009,31(9):1391-1397.(YangJian.Passive earth pressure of inclined retaining wallsunder seismic condition[J].Chinese Journal ofGeotechnical Engineering,2009,31(9):1 391-1 397.(in Chinese))
[4]杨剑.地震条件下倾斜挡土墙主动土压力研究[J].岩土工程学报,2009,31(9):1391-1397.(YangJian.Passive earth pressure of inclined retaining wallsunder seismic condition[J].Chinese Journal ofGeotechnical Engineering,2009,31(9):1 391-1 397.(in Chinese))
[5]王立强.挡土墙地震土压力及其分布[J].中国港湾建设,2007,(5):1-5.(Wang Liqiang.Distribution ofseismic soil pressure on a retaining wall[J].China Har-bour Engineering,2007,(5):1-5.(Chinese))
[6]顾慰慈.挡土墙土压力计算[M].北京:中国建材工业出版社,2001.(Gu Weici.The earth pressure calcu-lation on a retaining wall[M].Beijing,The ChinaBuilding Materials and Industry Press,2001.(in Chi-nese))
[7]Steedman R S,Zeng X.The influence of phase on thecalculation of pseudo-static earth pressure on a retainingwall[J].Geotechnique,1990,40(1):103-112.
[8]Wang Y Z.Distribution of earth pressure on a retainingwall[J].Geotechnique,2000,50(1):83-88.
[9]李广信.岩土工程20讲[M].北京,人民交通出版社,2007.(Li Guangxin.Geotechnical engineering 20speechs[M].Beijing,People Traffic Press,2007.(inChinese))
[10]卢坤林.非极限主动土压力计算方法初探[J].岩土力学,2010,31(2):615-619.(Lu Kunlin.Prelimina-ry study of active earth pressure under nonlimit state[J].Rock and Soil Mechanics,2010,31(2):615-619.(in Chinese))
[11]孙勇.地震条件下挡土墙主动土压力及其分布的统一解[J].岩土力学,2012,33(1):255-261.(SunYong.Unified solution of seismic active earth pressureand its distribution on a retaining wall[J].Rock andSoil Mechanics,2012,33(1):255-261.(in Chi-nese))
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