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嵌岩桩分布式检测及承载机理研究

朴春德

朴春德. 嵌岩桩分布式检测及承载机理研究[J]. 岩土工程学报, 2011, 33(sup2): 345-348.
引用本文: 朴春德. 嵌岩桩分布式检测及承载机理研究[J]. 岩土工程学报, 2011, 33(sup2): 345-348.
shu
PIAO Chun-de. Distributed detection and bearing mechanism of rock-socketed piles[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(sup2): 345-348.
Citation: PIAO Chun-de. Distributed detection and bearing mechanism of rock-socketed piles[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(sup2): 345-348.
shu

嵌岩桩分布式检测及承载机理研究  English Version

  • 1. 中国矿业大学资源与地球科学学院,江苏 徐州 221116 ； 2. 南京大学光电传感工程监测中心,江苏 南京 210093

基金项目: 青年科学基金项目( 2009A030)
详细信息
    作者简介:

    朴春德（ 1979 – ）,男,博士,从事岩土工程分布式监测与诊断研究。

  • 中图分类号: TU473

Distributed detection and bearing mechanism of rock-socketed piles

  • 1. Resources and Geosciences College, China University of Mining and Technology, Xuzhou 221116, China; 2. Center for Engineering Monitoring with Opto-Electronic Sensing, Nanjing University, Nanjing 210093, China

摘要

    摘要
  • 摘要: 基于 BOTDR 分布式光纤传感技术,研究了具有一定厚度上覆土层的嵌岩桩在桩顶荷载作用下承载特性,分析了嵌岩部分桩身轴力和侧摩阻力的发挥情况。结果表明：基于 BOTDR 的分布式光纤检测技术,具有分布式的特点,从而有效掌握嵌岩桩的荷载传递机理和承载特性；具有一定厚度上覆土层的嵌岩桩,荷载主要由上部土层的侧摩阻力承担,桩端承担荷载很少,嵌岩桩的设计中应当按摩擦桩或端承摩擦桩考虑；由于嵌岩部分岩石裂隙发育,在灌注混凝土的过程中一部分浆液进入嵌岩部分岩石的裂隙里面,提高了嵌岩部分的承载能力,从而在嵌岩段上部其侧摩阻力具有强化现象。
    Abstract: On the basis of BOTDR-based distributed optical fiber sensing technology, the bearing characteristics of rock-socketed piles, with working load on pile top, in the overlaying soil at a certain depth are studied, and the development of the pile lateral friction and the socket axial force is also analyzed. The results show that owing to the distributed features of BOTDR-based distributed optical fiber detection technology, an effective grasp is achieved of the bearing capacity and load transfer mechanism of rock-socketed piles. Moreover, the pile lateral friction of the upper soil layer bears most of the load of rock-socketed piles in the overlaying soil at a certain depth, while the pile bottom takes only a small proportion of the load. Therefore, the design of rock-socketed piles should be considered as that of friction piles or end-bearing friction piles. It is also found in the study that due to the growing number of socket rock cracks, part of concrete slurry is poured into socket rock cracks during the process of concrete filling, which accordingly improves socket bearing capacity. Thus, the pile lateral friction of the upper part of socket is intensified.
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    • 参考文献(9)
  • [1] 徐新跃 , 徐 策 . 软土地基嵌岩桩的受力性状 [J] . 工业建筑 , 2005, 35 ( 增刊 1): 497 – 500. (XU Xin-yu, XU Ce. Forced behavior of rock socketed piles in soft soil [J] . Industrial Construction, 2005, 35 (S1): 497 – 500. (in Chinese))
    [2] 何思明 , 卢国胜 . 嵌岩桩荷载传递特性研究 [J] . 岩土力学 , 2007, 28 (12): 2598 – 2602. (HE Si-ming, LU Guo-sheng. Study on load transfer characteristic of rock-socketed pole [J] . Rock and Soil Mechanics, 2007, 28 (12): 2598 – 2602. (in Chinese))
    [3] 熊智彪 , 王启云 , 谷淡平 . 红砂岩嵌岩桩模型试验研究 [J]. 建筑结构 , 2010, 40 (4): 92 – 94. (XIONG Zhi-biao, WANG Qi-yun, GU Dan-ping. Model test study on resistance of rock-socketed piles in red-sandstone rock [J] . Building Structure , 2010, 40 (4): 92 – 94. (in Chinese))
    [4] 赵明华 , 雷 勇 , 刘晓明 . 基于桩–岩结构面特性的嵌岩桩荷载传递分析 [J]. 岩石力学与工程学报 , 2009, 28 (1): 103 – 110. (ZHAO Ming-hua, LEI Yong, LIU Xiao-ming. Analysis of load transfer of rock-socketed piles based on characteristics of pile-rock structural plane[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28 (1): 103 – 110. (in Chinese))
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    [7] 索文斌 , 施 斌 , 张 巍 , 等 . 基于 BOTDR 的分布式光纤传感器标定实验研究 [J]. 仪器仪表学报 , 2006, 27 (9): 985 – 989. (SUO Wen-bin, SHI Bin, ZHANG Wei, et al. Study on calibration of distributed optical fiber sensors based on BOTDR [J] . Chinese Journal of Scientific Instrument, 2006, 27 (9): 985 – 989. (in Chinese))
    [8] 朴春德 , 施 斌 , 魏广庆 , 等 . 分布式光纤传感技术在钻孔灌注桩检测中的应用 [J]. 岩土工程学报 , 2008, 30 (7): 976 – 981. (PIAO Chun-de, SHI Bin, WEI Guang-qing, et al. Application of distributed fiber optic sensing techniques in bored pile detection[J]. Chinese Journal of Geotechnical Engineering, 2008, 30 (7): 976 – 981. (in Chinese))
    [9] 朴春德 , 施 斌 , 朱友群 , 等 . 灌注桩检测中 BOTDR 温度补偿试验研究 [J]. 防灾减灾工程学报 , 2009, 29 (2): 161 – 164. (PIAO Chun-de, SHI Bin, ZHU You-qun, et al. Experimental study on BOTDR temperature compensation in bored pile detection[J]. Journal of Disaster Prevention and Mitigation Engineering , 2009, 29 (2): 161 – 164. (in Chinese))
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出版历程
  • 收稿日期:  2011-08-07
  • 发布日期:  2011-12-06

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