结合某大直径钻孔灌注桩工程实例，分析了桩土模型的荷载-沉降曲线及荷载的传递规律。
Combined with a project example of a big diameter drilling pole pile, the load-settlement curve and load transfering law of pile and soil FEM are analyzed.
阐述了超长大直径钻孔灌注桩桩端承载力的影响因素，包括施工工艺、深度效应和尺寸效应等。
The bearing capacity of super-long and large-diameter bored pile tip is influenced by the facts including construction process, depth effect, size effect and so on.
当前的规范主要是针对中短桩建立而成的，对于超长大直径钻孔灌注桩的设计，其针对性不强，存在适应性问题。
The current standard mainly establishes at the aim of short intermediate pile, the design method of the long and large diameter bored piles is less targeted and its applicability is not wide.
通过实践应用自平衡试桩法新技术，对大直径钻孔灌注桩承载能力进行检验，为解决施工中出现的类似问题提供经验。
After testing pile and determining the load bearing capacity of single pile, the single piling method is adopted for construction.
在没有良好的持力层（基岩或砂、卵石层）和成熟经验可借鉴的情况下，对第四系土层大直径超长桩（钻孔灌注桩）的承载特性进行了分析。
The bearing characteristic of large diameter and super-long pile in quaternary soil layer is analyzed in the case of no good bearing layer (such as rock, sand and cobble layer) and no ripe experience.
结合大直径超长桩试桩得到的试验资料，应用有限元方法分析了压浆对大直径超长钻孔灌注桩承载性能的影响。
Effects of grouting on the bearing behavior of bored pile are analyzed with the finite element method in accordance with the test results of large diameter over length piles.
结合大直径超长桩试桩得到的试验资料，应用有限元方法分析了压浆对大直径超长钻孔灌注桩承载性能的影响。
Effects of grouting on the bearing behavior of bored pile are analyzed with the finite element method in accordance with the test results of large diameter over length piles.
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