机场道面的地基参数识别及承载力分析

A Simple Way of Estimating Load-Carrying Capacity of Airport Pavement

提出了一种机场道面参数的识别方法 ,并对机场道面的承载力进行分析。基于 Winkler地基板理论和弹性半空间理论的计算模型 ,应用最小二乘法准则 ,通过实测挠度与理论挠度进行拟合来识别反应模量 K和地基回弹模量 E0 ,并依据实测点挠度相等的方法实现从 E0 到 K的转换 ,继而进一步计算机场道面的承载力。实例计算表明 ,文中所提方法简单、易行 。

Our simple way is to obtain easily resilient modulus of foundation and then transform it into response modulus K; K is needed for determining PCN (Pavement Classification Number). The international standard is that, in order to ensure sufficient load carrying capacity of airport pavement, the value of PCN should be compatible with that of ACN (Aircraft Classification Number) supplied by the aircraft maker. Our method is based on Winkler elastic foundation model and elastic semi infinite space. Subsection 1.1 explains how to determine K and E 0 from deflection measurements of different points of the pavement corresponding to different magnitudes of uniform loading on the pavement. Subsection 1.2 explains how to transform E 0 into K . Section 2 gives a Beijing airport as an example. Table 1 shows deflections in cm for different points of airport pavement corresponding to uniform loading of 30, 50, 70, 90, 110 N/cm 2 respectirely. Table 2 shows the values of E 0 and K , determined from the measured deflections, for uniform loading of 30, 50, 70, 90, 110 N/cm 2 respectively. Table 4 shows the transformation of E 0 =18 430 N/cm 2 into K =72.7 N/cm 3, which deviates from actually measured K by only 2.7%.