在我国新一轮基础设施建设兴起的同时,桩基的发展面临着要求既能提高桩基承载力又能减少桩身材料用量达到建筑节能和可持续发展的新挑战,异形桩因其特殊的“异形”效果适应了新形式桩基发展的需要。首先介绍异形桩的设计理念、技术特征,接着重点讲述几类典型的异形桩,尤其是现浇X形混凝土桩的设计理念和研究方向,力求为异形桩推广和发展提供参考。 At the same time of the new round of infrastructure construction in our country, the development of pile foundation is faced with the new challenge which not only can improve the bearing capacity of pile foundation but also reduce the material usage of pile to achieve energy saving and sustainable development of building. Because of its special “Alien ” effect to adapt to the needs of the development of new forms of pile. Firstly, the design concept and technical characteristics of profiled piles are introduced. Then the design concepts and research directions of several typical profiled piles, especially those of cast-in-situ X-shaped concrete piles, are introduced emphatically, which will provide reference for the promotion and development of profiled piles.