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土的粒径分布曲线和粒组频率曲线如何测得，有何用途？对级配不连续的土，这两个曲线各有什么特征？

问答题
2022-01-02 04:28
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正确答案

1.土的粒径分布曲线：以土颗粒粒径为横坐标（对数比例尺）小于某粒径的土质量占试样的总质量的百分数为纵坐标绘制的曲线。根据土的粒径分布曲线可以求得土中各粒组的含量，用于评估土的分类和大致评估的工程性质.某些特征粒径，用于建筑材料的选择和评价土级配的好坏。
2.粒组频率曲线：以个颗粒组的平均粒径为横坐标对数比例尺，以各颗粒组的土颗粒含量为纵坐标绘得。土的粒径分配曲线不仅可以确定粒组的相对含量，还可以根据曲线的坡度判断土的级配的好坏.

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标签： 土质学与土力学 土木建筑工程 大学试题 工学
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土的粒径分布曲线和粒组频率曲线如何测得，有何用途？对级配不连续的土，这两个曲线各有什么特征？
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