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堆载法对浅层平板载荷试验的影响

, PP. 55-61

Keywords: 土木工程,堆载法,地基承载力,基准点,位移,附加应力

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Abstract:

为确保建筑物的安全,获得真实的地基承载力变得尤为重要。利用弹性理论法和有限差分法,分别对堆载法浅层平板载荷试验中堆载对地基承载力试验过程及结果存在的影响进行了定性和定量化分析。结果表明运用堆载法确定地基承载力特征值时,随着载荷试验的进行,堆载引起的附加应力场将逐渐减小至消失;堆载对周边土体的预压、基准点的相对位移,均使得由荷载-位移曲线所得地基承载力的特征值较真实情况偏大;堆载法浅层平板载荷试验实际上高估了地基的承载力。

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