| 砂土中群桩室内模型试验及颗粒流模拟研究 |
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| 引用本文： | 周健,白彦峰,张昭,贾敏才. 砂土中群桩室内模型试验及颗粒流模拟研究[J]. 岩土工程学报, 2009, 31(8): 1275-1280 |
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| 作者姓名： | 周健 白彦峰 张昭 贾敏才 |
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| 作者单位： | 同济大学地下建筑与工程系；同济大学岩土及地下工程教育部重点试验室；郑州市轨道交通有限公司； |
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| 基金项目： | 国家自然科学基金项目(50578122) |
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| 摘 要： | 对不同密实度砂土中的群桩进行室内模型试验,分析了桩土的一些宏观特性,并为进一步进行颗粒流细观模拟提供了必要的参数和宏观依据。在群桩室内模型试验的基础上,建立群桩的颗粒流分析模型,验证了群桩室内模型试验的一些宏观现象,然后进一步从细观角度分析了桩间距以及承台刚度等因素的改变对群桩工作性状的影响,此外还分析了不同位置基桩荷载分布。颗粒流模拟得到的一些结论可以为按沉降控制桩基设计及其工程应用提供理论依据。
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| 关 键 词： | 砂土 群桩 颗粒流 |
Lab model tests and PFC2D modeling of pile groups in sands |
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| ZHOU Jian,BAI Yanfeng,ZHANG Zhao,JIA Mincai. Lab model tests and PFC2D modeling of pile groups in sands[J]. Chinese Journal of Geotechnical Engineering, 2009, 31(8): 1275-1280 |
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| Authors: | ZHOU Jian BAI Yanfeng ZHANG Zhao JIA Mincai |
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| Affiliation: | 1. Department of Geotechnical Engineering Tongji University Shanghai 200092 China 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education Tongji University Shanghai 200092 China 3. Zhengzhou Rail Transit Co. Ltd. Zhengzhou 450000 China |
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| Abstract: | Lab model tests on pile groups in sands with different density are performed, which could provide necessary parameters and macro according for PFC modeling. Then some macro properties of pile-soil are analyzed. On such a basis, the particle flow code analysis models of pile groups are established. Some macro phenomena of lab model tests are verified. The influence of behaviors of pile groups with different pile intervals and cap stiffnesses from the micro level is analyzed. At last, the distribution of load on piles is analyzed. The particle flow code simulation results and the previous conclusions can provide the theoretical references for the design and construction of the settlement-control composite pile. |
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| Keywords: | sands pile group PFC2D |
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