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AN INTEGRAL EQUATION APPROACH AND PARAMETRIC ANALYSIS OF A FOUNDATION WITH LONG-SHORT-PILE
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摘要: 根据Muki和Sternberg的计算方法,推导出求解长短桩相互作用系数所需要的第二类Fredholm积分方程,利用叠加原理对长短桩桩基础进行计算分析。通过与常规弹性理论方法计算结果的比较发现,加筋效应对群桩的沉降以及群桩中各桩的荷载分担有明显的影响,最后对长短桩桩基础进行参数分析。分析表明,该方法可以用来分析大规模的群桩基础,具有较好的工程应用前景。
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关键词:
- 长短桩 /
- 加筋效应 /
- 相互作用系数 /
- Fredholm积分方程
Abstract: Following the technique proposed by Muki Sternberg, the second kind Fredholm. s integral equation is deduced to solve the interaction factors between long-short piles. Using the principle of superposition a foundation with longshort piles is calculated. Compared with the results obtained using other methods by routine theory of elasticity, it shows that the strengthening effects of intervening piles on pile group settlement and individual pile load sharing are obvious. Finally, an extensive parametric analysis is made to study the foundation with long-short piles. The numerical analysis shows that the present method can be readily used to analyse large pile groups.-
Key words:
- long-short-pile /
- strengthening effect /
- interaction factor /
- Fredoholm integral equation
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陈龙珠, 梁发云, 黄大治, 等. 高层建筑 应用长-短桩复合地基的现场试验研究. 岩土工程学报, 2004, 26(2): 167-171 梁发云. 混合桩型复合地基工程性状的理论与试验 研究: [ 博士学位论文]. 上海: 上海交通大学, 2004 杨 敏, 杨 桦, 王 伟. 长短桩组合 桩基础设 计思想及 其变形特性分析. 土木工程学报, 2005, 38(12): 103-108 王 伟, 杨 敏, 王红雨. 竖向受荷长 短桩基础 的位移分 析方法. 岩土工程学报, 2005, 27(11): 1 323-1 328 《桩基工程手册》编委 会. 桩基工 程手册. 北 京: 中 国建筑 工业出版社, 1995 Poulos H G. Analysis of the Settlement of Pile Groups. Geotechnique,1968, 18(4): 449-471 Muki R, Sternberg E. Elastostatic Load-Transfer to a Hal-f Space from aPartially Embedded Axially Loaded Rod. International Journal of Solidsand Structures, 1970(6): 69-90 Lee S L, Kog Y C, Karunaratne G P. Axially Loaded Piles in LayeredSoil. Journal of Geotechnical Engineering, ASCE, 1987, 113(4): 366-381 Mindlin R D. Force at a Point in the Interior of Sem-i Infinite Solid.Physics, 1936(7): 195-202 Butterfield R, Baneriee P K. The Elastic Analysis of Compressible Pilesand Pile Groups. Geotechnique, 1971, 21(1): 43-60 -
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