近年来,大直径钻孔灌注桩(以下简称大直径桩)在国内逐渐推广应用。北京图书馆新馆工程的桩基础,首先大面积采用了这种桩型,为在全国范围内推广提供了条件。这种大直径桩在国内是一项新技术,国外资料也很少。本文主要介绍其优点、设计计算原则、形状参数、构造要点等。 In recent years, large-diameter cast-in-place bored piles (hereinafter referred to as large-diameter piles) have been gradually applied in the country. The pile foundation of the new library project of Beijing Library was first adopted in a large area and provided the conditions for promotion throughout the country. This kind of large-diameter pile is a new technology in China, and there are few foreign materials. This article mainly introduces its advantages, design calculation principles, shape parameters, and construction points.