无产阶级文化大革命以来,钻孔灌注桩已广泛应用于许多基础工程中。为了更合理地设计桩基础,必须正确确定单桩的承载能力。确定单桩承载力的方法较多,各有特点,也各有缺陷。一些经验公式在计算上是较简便的,用得也很广泛,但对桩和土的相互作用难以全面考虑,不得不作一定的假定,而这些假定有些较为粗糙,自然会带来相当的误差。较可靠的是现场静力荷载试验,它较符合实际情况,确定的承载 Since the Great Proletarian Cultural Revolution, bored piles have been widely used in many foundations. In order to design pile foundation more rationally, the bearing capacity of single pile must be correctly determined. There are many ways to determine the bearing capacity of single pile, each with its own characteristics and defects. Some empirical formulas are computationally simple and widely used. However, it is difficult to fully consider the interaction between pile and soil, and some assumptions must be made. However, these assumptions are somewhat rough and naturally bring considerable errors. More reliable is the on-site static load test, which is more in line with the actual situation, determine the bearing