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为使灌注桩优化研究方向更明确,通过公式分析和实践验证,证明了桩承载效率指标的有效性和合理性。通过单因素分析,发现单桩承载效率与桩径和桩长的倒数成反比,并提出了桩基选型的步骤。结合全局承载效率分析,证明了承载效率指标不仅能可以作为基桩利用率指标,也可以评判群桩布置的优劣,同时也能指示灌注桩发展路径。
In order to clarify the research direction of the bored pile optimization, the validity and rationality of the pile bearing efficiency index are proved by the formula analysis and practical verification. Through univariate analysis, it is found that the bearing capacity of single pile is inversely proportional to the reciprocal of pile diameter and pile length, and the step of pile type selection is proposed. Combined with the global bearing efficiency analysis, it is proved that the bearing efficiency index can not only be used as an indicator of pile utilization, but also can judge the pros and cons of the arrangement of pile groups, and also can indicate the development path of pile.