本文提出了完全粘合于刚性下卧层上的中厚度地基表面在矩形均布荷载作用下的沉陷计算公式。采用了有限单元法和链杆法的技巧,用有限单元法求板的位移,用链杆法求板与地基间的接触反力。由于充分利用有限元法和链杆法的优点,大大减小了求解问题的规模,而计算效率则显著提高。文中的算例还说明,半空间地基和文克勒地基都是中厚度地基的特殊情况。 This paper proposes a formula for the subsidence of a medium-thick ground surface completely bonded to a rigid underlying layer under uniform rectangular loading. Using the finite element method and the chain-link method, the displacement of the plate was found by the finite element method, and the contact reaction force between the plate and the foundation was obtained by the chain-link method. Due to the full use of the advantages of the finite element method and the chain link method, the scale of solving the problem is greatly reduced, and the computational efficiency is significantly improved. The calculations in the paper also show that both the half-space foundation and the Winkler foundation are special cases of medium-thick ground.