【摘要】 通过对粉喷桩加固软土形成的复合地基中桩间土、粉喷桩单桩以及复合地基整体的破坏机理进行了分析，阐明了复合地基不同于单桩和桩间土的破坏模式，并指出复合地基加固体象实体深基础一样工作，其承载力由沉降变形条件所控制，进而得出了粉喷桩复合地基中沉降变形起主导作用的结论。更多还原

【Abstract】 Through analyzing the destructive mechanisms of composite foundation with piles made of injected powder materials, the single pile and the soil among the piles, the authors reveal the differences between the destructive model of composite foundation and that of the single pile and the soil among the piles.The authors also point out that composite foundation works like solid deep foundation. Its load bearing capacity is determined by subsidence deformation. Finally, the authors conclude that subsidence deformation plays a key role in composite foundation with piles made of injected powder materials.更多还原