载体桩在黏土持力层最优桩距的分析  

Analysis on optimal pile spacing of ram-compacted pileswith bearing base in clay bearing layer

作　　者：杨璐 李音 于永彬[2] YANG Lu;LI Yin;YU Yong-bin(School of Architecture and Civil Engineering,Shenyang University of Technology,Shenyang 110870,China;Shenyang Construction Engineering Quality Supervision Station,Shenyang 110002,China)

机构地区：[1]沈阳工业大学建筑与土木工程学院,沈阳110870 [2]沈阳市建设工程质量监督站,沈阳110002

出　　处：《沈阳工业大学学报》2021年第3期330-335,共6页Journal of Shenyang University of Technology

基　　金：国家自然科学基金项目(11102118);辽宁省优秀人才基金项目(LR2015046);清华大学国家重点实验室基金项目(SKLHSE-2016-C-01).

摘　　要：为了研究载体桩受周围桩的扰动情况并确定最优桩距,运用有限元分析软件ABAQUS对载体桩进行数值模拟分析.结果表明,模拟结果与试验结果吻合较好,验证了模型的正确性.载体桩在受周围桩扰动的情况下,夯扩体向上向外移动,扰动范围为3 m以内,最优桩距为2.4 m;在黏土持力层中,当夯扩体直径为1~1.2 m时,载体桩最优桩距为夯扩体直径的2倍;当夯扩体直径大于等于0.8 m且小于1 m时,载体桩最优桩距略大于夯扩体直径的2倍.In order to study the disturbing influence of surrounding piles on the ram-compacted piles with bearing base and determine the optimal pile spacing,a finite element analysis using ABAQUS software was used to carry out the numerical simulation analysis on the ram-compacted piles with bearing base.The results show that the simulation results agree well with the experimental measurements,confirming the correctness of the as-proposed model.When the ram-compacted piles with bearing base are perturbed by the surrounding piles,the rammed bodies move upward and outward,the perturbance range is smaller than 3 m,and the optimal pile spacing is 2.4 m.In the clay bearing layer,when the diameter of rammed bodies is in the range from 1 m to 1.2 m,the optimal pile spacing of ram-compacted piles with bearing base is two times of the diameter of rammed bodies.When the diameter of rammed bodies is more than or equal to 0.8 m while less than 1 m,the optimal pile spacing of ram-compacted piles with bearing base is slightly larger than two times of the diameter of rammed bodies.

关 键 词：载体桩 最优桩距 有限元分析 应力扩散 夯扩体 扰动 黏土 数值模拟 

分 类 号：TU473.1[建筑科学—结构工程]