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自平衡试桩法一种等效转换方法

聂如松, 冷伍明, 魏巍

聂如松, 冷伍明, 魏巍. 自平衡试桩法一种等效转换方法[J]. 岩土工程学报, 2011, 33(sup2): 188-191.
引用本文: 聂如松, 冷伍明, 魏巍. 自平衡试桩法一种等效转换方法[J]. 岩土工程学报, 2011, 33(sup2): 188-191.
NIE Ru-song, LENG Wu-ming, WEI Wei. Equivalent conversion method for self-balanced tests[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(sup2): 188-191.
Citation: NIE Ru-song, LENG Wu-ming, WEI Wei. Equivalent conversion method for self-balanced tests[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(sup2): 188-191.

自平衡试桩法一种等效转换方法  English Version

基金项目: 国家自然科学基金项目( 51108464);中南大学中央高校基本科研业务费专项资金资助( 2011QNZT106)
详细信息
    作者简介:

    聂如松 (1980 – ) ,男,湖南衡阳人,博士,讲师,主要从事基础工程、路基工程等方面的研究与教学工作。

  • 中图分类号: TU473

Equivalent conversion method for self-balanced tests

  • 摘要: 在对比分析自平衡试桩法与传统的单桩竖向抗压静载试验方法的基础上,提出了自平衡试桩法的一种等效转换方法。该方法首先对试桩数据进行反分析,利用 Mindlin 解求出上段桩侧摩阻力在桩周土体引起的附加应力,然后采用有效应力法得到侧摩阻力系数 与桩土相对位移 的关系,在此基础上,利用有效应力法自下而上分析得到竖向抗压静载试桩的 <> Q <> s 曲线。整个分析过程考虑了自平衡试桩法与竖向抗压静载试验方法中上段桩在地基中产生的附加应力对侧摩阻力的不同影响,同时又避免在等效转换过程中引进经验系数,并通过实例验证了该方法的正确性和可行性。
    Abstract: The difference between the conventional static loading tests and the self-balanced tests are presented, and an equivalent conversion method is proposed to determine the behaviors of pile based on the results of the self-balanced tests. In this method the data obtained from the field tests are carefully analyzed and the Mindlin solution is used to calculate the additional stress in soil which is produced by shaft resistance. Then the relationship between the shaft resistance and the relative movement between pile and soil, that is, and is determined. Based on the relationship, the method is used to calculate the shaft resistance and the axial force from the pile tip to the pile head are obtained. The <>Q-<>s curve of the conventional static loading tests is determined. The additional stress in the soil induced by the shaft resistance of the upper pile is taken into account. The experience coefficients adopted in the other equivalent conversion methods are not the necessities in this method. The correctness and feasibility of the proposed method are validated by examples. It is easy to be programmed and can be referred and used by the colleagues for further researches.
  • [1] 聂如松 , 冷伍明 , 李 箐 , 等 . 东江大桥嵌岩桩承载性能试验研究 [J]. 岩土工程学报 , 2008, 30 (9): 1410 – 1415. (NIE Ru-song, LENG Wu-ming, LI Qing, et al. Load transfer mechanism of rock-socketed piles of Dongjiang Rive Bridge [J]. Chinese Journal of Geotechnical Engineering , 2008, 30 (9): 1410 – 1415. (in Chinese))
    [2] 聂如松 , 冷伍明 , 杨 奇 , 等 . 桩–土间剪切应力的传递探讨 [J]. 岩土力学 , 2009, 30 (3): 799 – 804. (NIE Ru-song, LENG Wu-ming, YANG Qi, et. Discusion of the shear stress between pile and soil[J]. Rock and Soil Mechanics , 2009, 30 (3): 799 – 804. (in Chinese) )
    [3] 聂如松 . 关于“由 O-cell 试桩结果确定整桩的性能”的讨论 [J]. 岩土工程学报 , 2009, 31 (3):480 (NIE Ru-song. Discussion on “ Determination of pile behaviors based on O-cell test results of piles”[J]. Chinese Journal of Geotechnical Engineering , 2009, 31 (3): 480. (in Chinese))
    [4] 鲍育明 , 刘亚文 , 李志成 , 等 . 自平衡法在桩基承载力检测中的应用 [J]. 解放军理工大学学报 ( 自然科学版 ), 2003, 4 (3): 49 – 52. ( BAO Yu-ming, LIU Ya-wen, LI Zhi-cheng, et al. Application of self-balanced method for pile bearing capacity test[J]. Journal of PLA University of Science and Technology , 2003, 4 (3): 49 – 52. (in Chinese))
    [5] 龚维明 , 蒋永生 , 翟 晋 . 桩承载力自平衡测试法 [J]. 岩土工程学报 , 2000, 22 (5): 532 – 536. (GONG Wei-ming, JIANG Yong-sheng, ZHAI Jin. Self-balanced loading test for pile bearing capacity[J]. Chinese Journal of Geotechnical Engineering , 2000, 22 (5): 532 – 536. (in Chinese))
    [6] 龚维明 , 戴国亮 , 蒋永生 , 等 . 桩承载力自平衡测试理论与实践 [J]. 建筑结构学报 , 2002, 23 (1): 82 – 88. (GONG Wei-ming, DAI Guo-liang, JIANG Yong-sheng, et al. Theory and practice of self-balanced loading test for pile bearing capacity[J]. Journal of Building Structures , 2002, 23 (1): 82 – 88. (in Chinese) )
    [7] 郑英杰 , 张克绪 , 张尔其 , 等 . 由 o-cell 试桩结果确定整桩的性能 [J]. 岩土工程学报 , 2008, 30 (9): 1416 – 1422. (ZHENG Ying-jie, ZHANG Ke-xu, ZHANG Er-qi, et al. Determination of pile behaviors based on o-cell test results of piles[J]. Chinese Journal of Geotechnical Engineering, 2008, 30 (9): 1416 – 1422. (in Chinese) )
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出版历程
  • 收稿日期:  2011-08-01
  • 发布日期:  2011-12-06

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