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目前,对钻孔灌注摩擦桩承载性质的认识,及在成桩结果上存在的许多差异,很难作出令人满意的解释。作者运用相似性原理,在模型条件下,完成了桩形、结节、桩土接触面特性与承载关系的规律试验。阐述了摩擦桩和土层宏观界面与承载性质的关系。提出了单桩轴向受压容许承载力的更合理的经验公式。为钻孔灌注摩擦桩施工中合理成孔、成桩,保证桩载,作了较全面的技术分析。
At present, it is difficult to provide a satisfactory explanation for the understanding of the bearing properties of bored friction piles and the many differences in pile forming results. Using the principle of similarity, the authors completed the regular tests of the characteristics of piles, nodules, and contact characteristics between piles and soil under the model conditions. The relationship between the macroscopic interface and bearing properties of friction piles and soil layers is described. A more reasonable empirical formula for the allowable bearing capacity of single pile axial compression is proposed. A comprehensive technical analysis was made for the purpose of drilling holes and piles during the construction of bored friction piles and ensuring pile loading.