| 超长桩荷载传递性状研究 |
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| 引用本文： | 钟闻华,石名磊,刘松玉.超长桩荷载传递性状研究[J].岩土力学,2005,26(2):307-310. |
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| 作者姓名： | 钟闻华 石名磊 刘松玉 |
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| 作者单位： | 东南大学交通学院,岩土工程研究所,江苏,南京,210096 |
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| 基金项目： | 教育部重点科技项目(No. 01089)资助。 |
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| 摘 要： | 根据超长桩的现场静载荷试验资料，分析了超长桩的单桩荷载传递特性。结果表明，超长桩表现出端承摩擦桩的特性，桩顶以下1／3桩长及桩端以上1／6范围内的桩侧摩阻力极限值接近规范推荐值，而中间部分的桩侧摩阻力远远大于规范值，表现出强化效应，桩端注浆桩的侧摩阻力强化效应更加明显。根据其荷载传递特性，提出了单桩极限承载力的估算公式，实例计算结果和实测结果较吻合。
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| 关 键 词： | 超长桩 强化效应 桩端注浆 端承摩擦桩 |
| 文章编号： | 1000-7598-(2005)02-0307-05 |
| 收稿时间： | 2003-11-11 |
Load transfer performance of overlength piles |
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| ZHONG Wen-hua,SHI Ming-lei,LIU Song-yu.Load transfer performance of overlength piles[J].Rock and Soil Mechanics,2005,26(2):307-310. |
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| Authors: | ZHONG Wen-hua SHI Ming-lei LIU Song-yu |
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| Institution: | Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China |
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| Abstract: | This paper presents the test data of field static loading tests of overlength friction piles. The analysis of the data shows that the load transfer performance of overlength piles is similar to that of end-bearing friction piles. The ultimate side soil resistance from the depth of l/3 pile length beneath the ground surface to l/6 pile length is much higher than those recommended by the Specifications, which indicates that the side resistance is strengthened. However, the ultimate side resistance of other parts is in accordance with Specifications. And the base grouting can not only improve the soil bearing capacity under the piles, but also enhance in side soil resistance. Based on the analysis of the performance of overlength pile, a simplified method to calculate the ultimate load bearing capacity of single pile is suggested, which is validated by some pile case. |
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| Keywords: | overlength pile load transfer performance strengthening base grouting |
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