一、前言桩在承受侧向荷载时的内力分析,一直为有关工程设计人员所关注。通常,把桩视作置于文克尔地基上的弹性基础梁,地基的侧向抗力随深度的变化,则有不同的假设,即通称的所谓张氏法、K法、m法、C法,如图1所示。以上四种假设,在国内有关工程设计部门都曾有采用。对一般的粘性土和砂性土而言,铁路、交通、水利部门目前采用m法较多。有关规范和设计手册中对m法亦有推荐,并附有函数表可供查阅。但对超压密土,有关港工规范指出,可以采用张氏 I. INTRODUCTION The analysis of the internal forces of piles subjected to lateral loads has been of concern to the relevant engineering designers. In general, the pile is regarded as an elastic foundation beam placed on the Winkler foundation. As the lateral resistance of the foundation changes with depth, there are different assumptions, namely the so-called Chang’s method, K method, m method, and C method. ,As shown in Figure 1. The above four hypotheses have been adopted in the relevant domestic engineering design departments. For general cohesive soils and sandy soils, the railway, traffic, and water conservancy departments currently use more m methods. There is also a recommendation for the m-method in the relevant specification and design manual, with a function table available for inspection. However, for overpressured soils, the relevant Hong Kong workers’ regulations indicate that Zhang’s