橡胶轮胎散体桩群桩复合地基有限元分析

发布时间：2018-03-13 21:09

本文选题：橡胶轮胎散体桩　切入点：复合地基　出处：《沈阳建筑大学学报(自然科学版)》2016年06期 　论文类型：期刊论文

【摘要】：目的分析橡胶轮胎散体材料桩(RGP)群桩的承载性能,为橡胶轮胎散体桩复合地基的实际应用提供设计参数.方法通过ABAQUS有限元软件建立桩土三维有限元模型,研究不同桩长、桩径、桩间距及褥垫层厚度等对橡胶轮胎散体桩群桩承载性能的影响,得到载荷-位移、桩身应力等关系曲线.结果 RGP桩复合地基的沉降随桩长的增加而减小,但存在有效桩长.随着桩间距的增加,RGP桩复合地基的承载力、桩顶应力和桩身最大应力增加,桩土应力比先增大后减小.随着桩径的增加和褥垫层厚度的增加,RGP桩复合地基的承载力均呈增加趋势,桩土应力比减小.桩径的增加在提高复合地基置换率的同时也使得橡胶轮胎的环箍能力降低,所以RGP桩复合地基设计时应综合考虑桩土承载能力和橡胶轮胎的环箍作用.结论合理调节桩长、桩径、桩间距、褥垫层厚度等参数会促进桩土协同作用的发挥,进而改善RGP桩复合地基的承载能力.
[Abstract]:Objective to analyze the bearing capacity of rubber tire bulk pile group piles, and to provide design parameters for the practical application of rubber tire bulk pile composite foundation. Methods Three-dimensional finite element model of pile soil was established by ABAQUS finite element software, and different pile lengths were studied. The influence of pile diameter, pile spacing and cushion thickness on the bearing capacity of rubber tire pile group pile group is obtained. The load-displacement and pile body stress curves are obtained. Results the settlement of RGP pile composite foundation decreases with the increase of pile length. But there is effective pile length. With the increase of pile spacing, the bearing capacity of RGP pile composite foundation increases, the pile top stress and the maximum pile body stress increase. With the increase of pile diameter and the thickness of cushion, the bearing capacity of RGP pile composite foundation is increasing. The increase of pile diameter not only increases the replacement rate of composite foundation, but also reduces the hoop capacity of rubber tire. Therefore, the bearing capacity of pile and soil and the ring and hoop of rubber tire should be considered in the design of RGP pile composite foundation. Conclusion reasonable adjustment of pile length, pile diameter, pile spacing and cushion thickness will promote the synergistic effect of pile and soil. Then the bearing capacity of RGP pile composite foundation is improved.
【作者单位】：沈阳建筑大学土木工程学院;
【基金】：国家自然科学基金项目(51578348) 辽宁省“百千万人才工程”项目(2015-57)
【分类号】：TU473.1

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