The Cubic Spline Interpolation of Compression Modulus Es of Geotechnical Consolidation Test —Excel VBA Development Based on p-s Test Data
摘要:
压缩模量Es是土的物理力学指标之一。传统的方法是给出e-p曲线图进行人工查取[ p₁, p₂]及[ e₁, e₂],然后计算压缩系数 av=-Δ e/Δ p ,再计算压缩模 量Esv =(1+ e 0)/av 。本文利用实验数据( p,ln(h))建立三次样条函数。在此基础上,以 Excel VBA 为工具,编制了Es宏,实现了在PC机上计算任意点的切线压缩模量Est及任意区间的割线压缩模量Esv。
Compression modulus Es is one of the physical and mechanical indexes of soil. The traditional method is to give the curve e-p for manual search [p1, p2] and [e1, e2] , then calculate the compression coefficient av = -Δe/Δp, and then calculate the compression modulus Esv= (1+e0)/av . In this paper, cubic spline function is established by using experimental data (p, ln (h) ) . On this basis, using Excel VBA as a tool, an Es macro is compiled to calculate the tangent compression modulus Es of any point and secant compression modulus Es v of any interval on a PC.