基于双侧非对称破坏模式的临坡地基承载力极限平衡分析方法

发布时间：2018-07-26 18:41

【摘要】：地基极限承载力的分析与计算是临坡基础设计的重要依据。首先,结合临坡条形基础地基工程的特点,通过深入研究其破坏机理,借鉴现有临坡地基破坏模式确定的经验,构建出考虑临坡条形基础地基破坏模式双侧性与非对称性特征的地基合理破坏模式;其次,在上述临坡地基破坏模式研究基础上,引进刚体极限平衡分析方法,导出反映破坏模式双侧性与非对称性以及基础与坡顶距离影响的临坡条形基础地基极限承载力分析模型;然后,采用序列二次规划优化分析方法,解决双侧性与非对称性引起的地基破坏几何模型的不确定性问题,建立临坡条形基础地基极限承载能力的确定方法;最后,采用该文及现有相关研究方法对工程实例进行对比分析,表明文中研究方法的合理性与可行性。
[Abstract]:The analysis and calculation of the ultimate bearing capacity of the foundation is an important basis for the design of the adjacent slope foundation. First of all, considering the characteristics of the strip foundation engineering near the slope, through the in-depth study of its failure mechanism, the experience of determining the failure mode of the adjacent slope foundation is used for reference. The reasonable failure mode of foundation considering the characteristics of bilaterality and asymmetry is constructed. Secondly, on the basis of the research on the failure mode of adjacent slope foundation, the limit equilibrium analysis method of rigid body is introduced. An analytical model of ultimate bearing capacity of strip foundation on a slope is derived, which reflects the influence of the failure modes on both sides and asymmetries and the distance between the foundation and the top of the slope, and then the sequential quadratic programming optimization analysis method is used to analyze the ultimate bearing capacity of the strip foundation. In order to solve the uncertainty problem of geometric model of foundation failure caused by bilateral and asymmetry, the determination method of ultimate bearing capacity of strip foundation with adjacent slope is established. Finally, By using this paper and the existing research methods, the rationality and feasibility of the research methods in this paper are proved.
【作者单位】：湖南大学岩土工程研究所;湖南理工学院;
【基金】：国家自然科学基金(51378198) 高等学校博士学科点专项科研基金(20130161110017)
【分类号】：TU470

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