中文摘要：

随着经济的快速发展，我国大型建（构）筑物、围海造地和场地形成工程日益增多，大面积荷载下的地基沉降问题日益突出，因此开展大面积荷载作用下地基的沉降计算理论研究具有重要的理论价值和现实意义。基于广义Gibson地基模型，考虑地基参数随深度变化的非均质性，求解出大面积荷载作用下地基中心点的竖向位移解析解，利用解析分析对“大面积”荷载进行了讨论与定义。最后，通过上海某大面积场地形成工程实例和三维数值模拟验证了该方法的可行性。结果表明，该计算方法能够较好地反映大面积荷载作用下地基的沉降规律，对于实际工程中预测大面积荷载下地基沉降具有应用价值。

英文摘要：

With a rapid growth of economy in China, the projects of large infrastructure, reclamation land and site formation have increased continuously. However, the settlement problems due to the large-area load have been significant increasingly. Thus, it has a great academic value and practical meaning to develop the settlement calculation method of soil under large-area load. This paper derived an analytical solution to calculate the central vertical displacement of soil under the large-area uniformly-distributed load considering the nonhomogeneous of soil properties distributed along depth based on the generalized Gibson foundation model. Using the proposed solution, the definition of ＇ large-area＇ load was discussed. The feasibility of the method was verified through a comparison with three-dimensional numerical analysis and case history application. The results showed that the calculation method can well reflect the settlement law of a foundation under large-area loads. The method is valuable for application of prediction of ground settlement under large-area load in practice.