underreamed pile 按其成桩方式可分为钻孔扩底桩、爆破桩、震冲扩底桩。 扩底桩是底部直径大于上部桩身直径的灌注桩。其单桩承载力比桩身直径相同的直桩的承载力有较大提高。
misc. expanded bore pile ; pedestal pile
And the effects of shaft geometry on bearing and deformation characteristic of large diameter belled pile are studied by using this model. The changing regularities of end bearing ratio of large diameter belled pile are obtained.
随后,运用该模型分析了大直径扩底桩的桩身几何参数等因素对其单桩承载变形性状的影响,得到了大直径扩底桩端阻比的变化规律。
参考来源 - 大直径扩底桩试验研究与数值分析Now, theory research of pile with bulk shaped can't keep up withthe level of application. The tradition measure of ensuring verticalbearing capacity of pile with bulk shaped is the field loading test.
目前，对扩底桩的理论研究工作还未跟上应用水平，承载能力只有通过现场荷载试验才能确定。
参考来源 - 粘土中扩底桩承载性状及承载力预测研究·2,447,543篇论文数据，部分数据来源于NoteExpress
目前人们对大直径扩底桩端阻力折减问题有不同的看法。
The current viewpoints on the modifying coefficient problem of end-bearing resistance of large diameter belled piles are different.
南宁市地王商会中心的楼层高、荷载大，其基础采用了软岩扩底桩。
Enlarged toe piles embedded in weak-rock foundation is adopted in Nanning Diwang Commerce Center for the height of the building is great and the load on it is large.
结合典型工程实例，总结和分析了大直径扩底桩在砂层中的扩底稳定问题。
Based on typical engineering examples, the stability problem of base expansion of large diameter expanded-base piles in sand layer is summarized and analyzed.
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