| 长短桩复合地基的沉降分析 |
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| 引用本文： | 彭建勋,余萍.长短桩复合地基的沉降分析[J].中南林业科技大学学报,2011,31(2). |
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| 作者姓名： | 彭建勋 余萍 |
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| 作者单位： | 信阳师范学院土木工程学院; |
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| 基金项目： | 河南高等教育教学改革研究省级立项项目(2009SJGLX227); 信阳师范学院青年科研基金项目(200940) |
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| 摘 要： | 以桩土相互作用理论和现场实测数据为基础,采用实体建模对长短桩复合地基进行建模,通过接触单元模拟桩基与土体、褥垫层与土体之间的摩擦作用,借助MIDAS/GTS有限元软件对长短桩复合地基进行数值模拟,分析讨论长短桩的长细比、桩间距等对不同加固区沉降的影响。研究结果表明:长桩的长细比较短桩的长细比对加固区和下卧层的变形的影响要大,土体的竖向沉降量符合双曲线模型,而土体的竖向应力符合半抛物线模型。
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| 关 键 词： | 复合地基 数值模拟 长细比 沉降分析 |
Settlement analysis of long-short-piles composite foundation |
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| PENG Jian-xun,YU Ping.Settlement analysis of long-short-piles composite foundation[J].Journal of Central South Forestry University,2011,31(2). |
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| Authors: | PENG Jian-xun YU Ping |
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| Institution: | PENG Jian-xun,YU Ping(School of Civil Engineering,Xinyang Normal University,Xinyang 464000,Henan,China) |
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| Abstract: | Based on the theory of interaction of pile-soil and real measured radar data,the long-short-piles composite foundation was numerical simulated by finite element software MIDAS/GTS,in which the long-short-piles composite foundation was modeled with solid model,the friction of pile-soil and cushion-soil was simulated with contact element,and the influences of pile slenderness ratio and pile spacing on different reinforcement areas were also discussed.The results indicate that the slenderness ratio of long pil... |
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| Keywords: | composite foundation numerical simulation slenderness ratio settlement analysis |
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