在桩基工程勘察设计中,选定桩尖持力层以后,如何确定桩尖进入持力层的深度,是一个颇为重要的问题。近年来国内外对此进行了一些试验研究,均认为桩的承载能力不但同持力层的厚度及其物理力学特性有关,而且和桩尖进入持力层的深度也有密切关系。 In the pile foundation engineering survey and design, after selecting the pile tip holding layer, how to determine the depth of the pile tip into the bearing layer is an important issue. In recent years, some experimental studies have been carried out at home and abroad, and it is believed that the bearing capacity of piles is not only related to the thickness of the bearing layer and its physical and mechanical properties, but also has a close relationship with the depth of the pile tip into the bearing layer.