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通过现场试验和室内模型试验,采用空底桩单桩竖向抗压载荷的方法测定桩侧摩阻力。研究结果表明,灌注桩的侧摩阻力会随着桩周土密实度的增长而提高;挤土成孔桩和螺旋灌注桩的侧摩阻力相对于非挤土桩有了明显提高;给出了非挤土挖孔桩、挤土成孔桩和螺旋挤土桩的极限侧摩阻力的计算。研究成果用以指导桩基础的设计和施工,能使之达到经济合理的目的。
Through the field test and indoor model test, the vertical frictional resistance of the pile at the bottom of the pile is measured by the method of vertical compressive load. The results show that the lateral friction of cast-in-situ piles will increase with the increase of soil compactness. The lateral friction of piles and piles has been significantly improved compared with that of non-compacted piles. Calculation of Ultimate Side Frictional Resistance of Non - squeezed Digging Piles, Compacted Piles and Spiral Compaction Pile. The research results are used to guide the design and construction of pile foundation to make it economically reasonable.