遗憾的是，这种方法虽然很流行，但是很不可靠。有许多因素会导致结果的偏差，所以无法信任单一度量值的精确性。
Sadly, the popularity of this approach does not trump its invalidity - there are just too many sources of variation to let you trust a single measurement.
为了评估不同失效准则对基桩可靠度的影响，传统的方法是引入失效准则偏差系数。
A bias factor is commonly used to account for the effect of differences in failure criteria on reliability of pile foundations.
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