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荷载板试验结果

习题 【1-1】 某住宅总压力为 70kPa ,埋深 1m ,淤泥质粉质粘土的天然重度为 18kN/m 3 ,在基础埋深 1m 处用直径 1.13m 的荷载板进行室外荷载板试验,得到表 1-3 数据,试确定该地基的基床系数。. 荷载板试验结果. 【 解 】 式中 p 2 和 p 1 分别为基础底面计算压力和土的自重压力。故有. 对应的沉降由下表进行线性内插,有. 从而有. 所以该地基的基床系数. 图 1-13 习题 1-2.

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荷载板试验结果

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  1. 习题【1-1】某住宅总压力为70kPa,埋深1m,淤泥质粉质粘土的天然重度为18kN/m3,在基础埋深1m处用直径1.13m的荷载板进行室外荷载板试验,得到表1-3数据,试确定该地基的基床系数。 荷载板试验结果 【解】 式中p2和p1分别为基础底面计算压力和土的自重压力。故有

  2. 对应的沉降由下表进行线性内插,有 从而有 所以该地基的基床系数

  3. 图1-13 习题1-2 习题【1-2】如图1-13所示,某地基表面作用p=100kPa的矩形均布荷载,基础的宽, 长,试写出弹性半空间地基模型的柔度矩阵。矩形荷载面积等分为4个网格单元,变形模量 ,泊松比。

  4. 【解】根据式(1-37),弹性半空间地基模型的柔度系数可表示为:【解】根据式(1-37),弹性半空间地基模型的柔度系数可表示为:

  5. 由题知,a=1m,b=2m,则 当i = j时,

  6. 当i ≠ j时, , ,

  7. 弹性半空间地基模型的柔度矩阵为 , ,

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