不同配筋形式下微型桩的桩顶变形量研究

发布时间：2018-04-18 17:55

本文选题：微型桩 + 配筋形式　；参考：《公路》2017年11期

【摘要】：基于对微型桩力学特性的研究,建立其桩顶水平位移的力学模型,分析同一外力作用下不同配筋形式微型桩桩顶变形情况。研究表明:不同配筋形式微型桩桩顶变形量主要取决于总配筋材料截面惯性矩的大小,两者成反比关系。理论计算分析得到桩周配筋桩的桩顶变形量最小,钢管桩的桩顶变形量最大;桩心配筋桩的配筋率虽等同于桩周配筋桩,但其桩顶变形量明显大于桩周配筋桩和锚筋桩。最后,通过数值模拟对理论计算分析进行了验证,结果基本一致,桩周配筋桩抗弯、抗变形的效果远甚于其他配筋形式微型桩,是锚筋桩和钢管桩的有效组合形式。
[Abstract]:Based on the study of the mechanical properties of micro pile, the mechanical model of horizontal displacement of the pile top is established, and the deformation of the top of micro pile with different reinforcement forms under the same external force is analyzed.The results show that the deformation of the top of micro-pile with different reinforcement forms mainly depends on the moment of inertia of the section of the total reinforcement material, and the two are inversely proportional to each other.Theoretical calculation and analysis show that the deformation of the pile top of the reinforced pile around the pile is the smallest, the deformation of the pile top of the steel pipe pile is the largest, and the reinforcement ratio of the pile core reinforced pile is the same as that of the reinforced pile around the pile, but the deformation of the top of the pile is obviously larger than that of the reinforced pile and anchor reinforced pile around the pile.Finally, the theoretical calculation and analysis are verified by numerical simulation. The results are basically consistent. The anti-deformation effect of reinforced pile around pile is much better than that of other micro-piles, so it is an effective combination of anchor reinforced pile and steel pipe pile.
【作者单位】：中煤科工集团西安研究院有限公司;中交第一公路勘察设计研究院有限公司;
【基金】：中科院冻土工程国家重点试验室开放基金项目,项目编号SKLFSE201311 中煤科工集团西安研究院科技创新基金项目,项目编号2012XAYCX020 中铁资源集团有限公司科技开发计划项目,项目编号2012-重点-61
【分类号】：TU473.1

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