| 管式格栅加筋碎石桩的承载力影响因素分析 |
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| 引用本文： | 韩剑飞,高明军,丁选明,刘志浩.管式格栅加筋碎石桩的承载力影响因素分析[J].土工基础,2012,26(5):54-57. |
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| 作者姓名： | 韩剑飞 高明军 丁选明 刘志浩 |
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| 作者单位： | 1. 水利部淮河水利委员会水利科学研究院,安徽蚌埠,233000
2. 河海大学岩土力学与堤坝工程教育部重点实验室,南京210098;河海大学岩土工程科学研究所,南京210098 |
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| 基金项目： | 江苏省自然科学基金创新学者攀登项目（编号：BK2008040）; 江苏省青蓝工程创新团队资助项目 |
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| 摘 要： | 分析了竖向管式格栅加筋碎石桩可能的破坏模式,针对不同的破坏模式,提出了单桩极限承载力的理论计算方法。针对各破坏模式,分析了格栅单宽极限抗拉强度、加筋深度、桩径和摩擦角对单桩极限承载力的影响。研究结果表明:加筋对承载力提高作用显著,且桩径越小,提高作用越明显;加筋深度越大,单桩极限承载力越大;单桩极限承载力随桩径的增大呈非线性递增关系,桩径越大,提高越显著;摩擦角越大,承载力提高越显著。
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| 关 键 词： | 复合地基 承载力 土工格栅 管式格栅碎石桩 |
Analysis of Influencing Factors the Ultimate Axial Capacity of the Granular Columns Reinforced with Geogrid Tubes |
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| HAN Jianfei
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GAO Mingjun
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DING Xuanming
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LIU Zhihao.Analysis of Influencing Factors the Ultimate Axial Capacity of the Granular Columns Reinforced with Geogrid Tubes[J].Soie Engineering and Foundation,2012,26(5):54-57. |
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| Authors: | HAN Jianfei GAO Mingjun DING Xuanming LIU Zhihao |
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| Affiliation: | 1.Hydraulic Research Institute of Anhui Province and Huai River Commission,Bengbu Anhui 233000; 2.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098; 3.Geotechnical Research Institute,Hohai University,Nanjing 210098) |
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| Abstract: | The failure modes of the granular columns reinforced with Geogrid tubes are analyzed.The ultimate axial capacity of the single column is proposed based on each failure mode.The influence of various factors,such as,the limit tensile strength of geogrids,the reinforcement depth,the column diameter and the internal friction angle of granular material,on the ultimate axial capacity of a single column is also studied.The results indicate that the geogrids can greatly improve ultimate axial capacity of the granular columns.The ratio of the ultimate axial capacity of a column with geogrid tube over a column without the tube is decrease with the increase of the column diameter.The capacity ratio is also increase with the reinforcement depth.The magnitude of the ultimate axial capacity is also increase with the column diameter and the internal friction angle of the granular material. |
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| Keywords: | Composite Foundations Axial Capacity Geogrids Granular Column Reinforced with Geogrid Tubes |
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