摘要
针对经典朗肯与库伦土压力理论不能计算有位移影响的土压力问题,通过分析土压力与位移的非线性关系,在支护结构发生任意位移的状态下,建立了土体松弛应力和挤压应力的似双曲正切函数模型,推导出考虑位移影响下的非极限土压力计算公式,并对模型的合理性进行了验证。实例应用结果表明,计算值与实测值吻合较好,模型合理、有效。
As the fact that the classic Rankine^s and Coulomb＇s earth pressure theory can not be usecl to calculate earth pressure problem under the influence of the displacement, after analyzing the nonlinear relationship between earth pressure and displacement, the approximate hyperbolic tangent function model of earth relaxation stress and extrusion stress is developed in the state of arbitrary displacement of supporting structure. And then the calculation formula of un- limited earth pressure is deduced by considering the influence of the displacement. At the same time, the rationality of the model is verified. Application example results show that calculated and measured values are in a good agreement; the model is reasonable and effective.
出处
《水电能源科学》
北大核心
2013年第11期127-131,共5页
Water Resources and Power
基金
国家自然科学资金资助项目(51268010)
关键词
支护结构
土压力
位移
计算模型
双曲正切函数
非线性
supporting strueture
earth pressure
displacement
calculation model
hyperbolic tangent function
nonlinearity
