双线性内插公式推导及在岩土工程中的应用

The Deduction of the Bilinear Interpolation Formula and Its Application in Geotechnical Engineering

双线性内插在地基沉降计算、标贯锤击数修正等岩土工程问题的查表求解过程中经常用到。通常做法是：运用三次线性内插来实现。文章推导出了双线性内插公式，在解决查表内插等类似问题时，代入相关数据后进行计算即可。

The bilinear interpolation is often used in the look-ing-up table for solving process of geotechnical engineering problems including set lement calculation, SPT hammer num-ber correction. The usual practice is：to achieve the goal by usi-ng three linear interpolations. This paper deduced the bilinear interpolation formula, in solving similar problems of the loo-k-up table interpolation, relevant data can be substituted into the formula to calculate.