1、当Q–s曲线上有比例界限时，取该比例界限所对应的荷载值。
2、当能确定极限荷载和比例界限，且极限荷载小于对应比例界限的荷载值的2倍时，取极限荷载值的一半。
3、出现Q–s曲线无法确定比例界限，承载力又没达到极限时，取最大试验荷载的一半所对应的荷载值。
4、当地基承载力特征值需要按地基变形取值时，可按下表对应的地基变形取值，但所取的承载力特征值不应大于最大试验荷载的1/2。
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