楔形单桩与群桩非线性荷载-沉降曲线计算方法

发布时间：2018-06-30 00:04

本文选题：楔形桩 + 双曲线模型　；参考：《哈尔滨工业大学学报》2017年12期

【摘要】：为研究楔形单桩和楔形群桩的非线性荷载-沉降关系,根据楔形桩桩侧与桩端受力特点,假设桩侧和桩端的应力-沉降分别满足双曲线与双折线模型,同时考虑桩-土位移协调关系及土体分层特性,提出了楔形单桩在均质土和分层土中的荷载-沉降曲线计算方法.在此基础上,利用有限差分原理求解楔形桩相互作用的控制微分方程,得出了考虑楔形群桩相互影响的计算方法.进而,考虑楔形群桩之间的相互影响,依据承台性状不同分别提出了刚性和柔性承台下楔形群桩的荷载-沉降计算方法.本文方法预测结果与已有模型试验及现场试验结果对比表明:本文提出的计算方法能较好地计算均匀及分层土中楔形单桩和群桩的沉降.
[Abstract]:In order to study the nonlinear load and settlement relationship of wedge-shaped single pile and wedge group pile, according to the stress characteristics of the side and pile end of the wedge pile, it is assumed that the stress settlement of the pile side and the pile end satisfies the hyperbola and the double fold line respectively. At the same time, the pile soil displacement coordination and the soil layer characteristics are considered, and the wedge-shaped single pile is put forward in the homogeneous soil and the stratified soil. On this basis, on this basis, the finite difference principle is used to solve the control differential equation of the wedge pile interaction, and the calculation method for the interaction of the wedge group piles is obtained. Furthermore, the mutual influence of the wedge group piles is considered, and the rigid and flexible pile group piles under the flexible caps are proposed according to the different bearing capacity. The calculation method of this method is compared with the existing model test and the field test results. The results show that the calculation method proposed in this paper can well calculate the settlement of single and group piles in homogeneous soil and stratified soil.
【作者单位】：岩土及地下工程教育部重点实验室(同济大学);同济大学地下建筑与工程系;
【基金】：国家自然科学基金(41272288)
【分类号】：TU433;TU473.1

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