[提要]  通过对复合地基中刚性桩与柔性桩不同的破坏机制和承载特陛、影响复合地基强度和刚度的主要因素：有效桩长、置换率、桩土应力比和桩土变形协调等分析比较，探讨刚性桩复合地基用于一般十～二十层高层建筑的软土地基处理的实用性和经济性。根据数项工程实例和静载试验结果说明加固效果，并简单介绍刚性桩成桩工艺。
[关键词]  刚性桩 柔性桩 复合地基 变形协调 承载力

This paper compares and analyses coordinately different failure mechanism and bearing capacity characteristics of composite foundation with rigid and flexible pile respectively, and factors which influence strength and rigidity of composite foundation, including the effective of pile length,  replacement rate, stress ratio and deformation of pile soil, it discusses the practicability and economy of adopting rigid pile composite foundation on high-nse building (10 - 20 storeys high) built on soft foundation. According to the graphics of some static loading tests, it explains the strengthening effects of the rigid pile composite foundation and briefly iritroduces piling technology of rigid pile.
Keywords: rigid pile; flexible pile; composite foundation; deformed coordination; bearing capacity