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尉学勇, 王晓谋, 怀超. 斜坡地基极限承载力上限解计算与分析[J]. 岩土工程学报, 2010, 32(3).
引用本文: 尉学勇, 王晓谋, 怀超. 斜坡地基极限承载力上限解计算与分析[J]. 岩土工程学报, 2010, 32(3).
Calculation and analysis of upper limit solution of ultimate bearing capacity of sloping ground[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(3).
Citation: Calculation and analysis of upper limit solution of ultimate bearing capacity of sloping ground[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(3).

斜坡地基极限承载力上限解计算与分析

Calculation and analysis of upper limit solution of ultimate bearing capacity of sloping ground

  • 摘要: 基于极限平衡法和极限分析法理论,建立了一个新的能考虑坡后土体坡度影响的斜坡地基承载力计算模式,推导出一个上限解公式,并与有限元方法和其他上限解计算结果进行了比较分析。分析结果表明,所得结果与斜坡地基极限承载力的真实解较为接近,能较好地反映实际的斜坡地基的承载力。此外,编制斜坡地基坡后土体发挥系数的计算程序,分析了斜坡地基内摩擦角、基础下侧土体坡度、基础上侧土体坡度、相对坡顶距及基础相对埋深等因素对斜坡地基极限承载力上限解的影响,得到了不同情况下斜坡地基的承载力系数和坡后土体的发挥系数。研究成果可用于斜坡地基的理论分析,为斜坡地基的设计提供依据。

     

    Abstract: Based on the theories of the limit equilibrium and limit analysis approaches, a new calculation model is presented, which can consider the effect of ascent of fill section at the back of slopes. A new upper limit formula is deduced, and its results are compared with those of the finite element method and other upper limit calculations. The analytic results show that the upper limit solution is close to the real solution, and it can reflect the ultimate bearing capacity of the real sloping ground. Besides, with the program which can calculate the mobilization factor of the fill section at the back of the sloping ground, the effect is analyzed, including angle of internal friction of the sloping ground, underside slope angle, upside slope angle, relative distance from the edge of slopes and relative depth of footings. The bearing capacity factors and mobilization factor of the fill section at the back of the sloping ground in different conditions are gained. The study results can be used in theoretical analysis of sloping ground, and provide some beneficial conclusions for the design of sloping ground.

     

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