【摘要】 现有的节理岩体地基承载力计算方法大多是以Hoek-Brown强度准则为基础建立的,没有考虑中间主应力的效应,不能充分发挥岩体的强度潜能。综合统一强度理论和Hoek-Brown强度准则的优点,结合临界滑动场理论求解地基承载力,并考虑地震荷载的影响。计算结果表明,基于非线性统一强度理论的地基承载力有不同程度的提高,现有方法中的地基承载力偏于保守;在地震荷载作用下地基承载力有一定程度的降低。更多还原

【Abstract】 For most of the existing algorithms for calculating ultimate bearing capacity of jointed rock masses based on Hoek-Brown strength theory,they have not considered the effect of intermediate principal stress;so these algorithms cannot make full use of rock strength.Combining the advantage of nonlinear unified strength criterion and Hoek-Brown nonlinear failure criterion,and taking the impacts of earthquake loads into account,a new algorithm for computing the bearing capacity of foundation based on critical sliding field theory is proposed.The experiment results demonstrate that the bearing capacity of the foundation is enhanced based on nonlinear unified strength theory;the existing methods of bearing capacity of foundation are relatively conservative,so the bearing capacity of foundation will reduce under the effects of earthquake loads.更多还原