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通过构建一种网格状多刚性块破坏机制,利用上限法研究了黏土地基各向异性和非均质对粗糙条形基础地基承载力的影响。该破坏机制允许滑动面和速度矢量沿破坏区域过渡区的径向和切向发生变化,形成了更为精确的破坏机制和塑性流动速度场。根据上限定理得到各向异性和非均质性黏土上条形基础极限承载力的目标函数,将其转化为非线性规划问题,并通过编程对该计算模型进行求解。与已有研究成果对比分析表明,两者具有较好一致性,且优于现有同类方法。文中亦探讨了黏土地基非均质、各向异性以及其他相关参数对地基承载力的影响。
By constructing a grid-like multi-rigid block failure mechanism, the influence of anisotropy and heterogeneity of clay foundations on the bearing capacity of the rough strip foundation is studied by using the upper bound method. The failure mechanism allows the radial and tangential changes along the transition zone between the sliding surface and the velocity vector to form a more accurate failure mechanism and plastic flow velocity field. According to the upper bound theorem, the objective function of the ultimate bearing capacity of the strip foundation on anisotropic and anisotropic clay is obtained, which is transformed into a nonlinear programming problem. The computational model is solved by programming. Compared with the existing research results show that the two have good consistency, and better than existing similar methods. The paper also discusses the influence of clay foundation heterogeneity, anisotropy and other related parameters on the bearing capacity of foundation.