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超深开挖对抗拔桩承载力影响的离心机试验研究

胡琦, 凌道盛, 孔令刚, 罗耀武, 牛犇, 陈峥

胡琦, 凌道盛, 孔令刚, 罗耀武, 牛犇, 陈峥. 超深开挖对抗拔桩承载力影响的离心机试验研究[J]. 岩土工程学报, 2013, 35(6): 1076-1083.
引用本文: 胡琦, 凌道盛, 孔令刚, 罗耀武, 牛犇, 陈峥. 超深开挖对抗拔桩承载力影响的离心机试验研究[J]. 岩土工程学报, 2013, 35(6): 1076-1083.
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HU Qi, LING Dao-sheng, KONG Ling-gang, LUO Yao-wu, NIU Ben, CHEN Zheng. Effects of deep excavation on uplift capacity of piles by centrifuge tests[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(6): 1076-1083.
Citation: HU Qi, LING Dao-sheng, KONG Ling-gang, LUO Yao-wu, NIU Ben, CHEN Zheng. Effects of deep excavation on uplift capacity of piles by centrifuge tests[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(6): 1076-1083.
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超深开挖对抗拔桩承载力影响的离心机试验研究  English Version

  • 1. 浙江工业大学建筑工程学院，浙江 杭州 310014; 2.浙江大学软弱土与环境土工教育部重点实验室，浙江 杭州 310027; 3. 黄河水利委员会，河南 郑州 450003; 4. 华东电力设计院，上海200063

基金项目: 国家自然科学基金项目（51108417）；浙江大学软弱土与环境土工教育部重点实验室开放基金项目（2011P01）
详细信息
    作者简介:

    胡 琦(1978- )，男，江西南城人，博士，副教授，主要从事软黏土力学、基坑工程、桩基工程等方面的研究与教学工作。E-mail: dsling@zju.edu.cn。

  • 中图分类号: TU411.93

Effects of deep excavation on uplift capacity of piles by centrifuge tests

  • 1. College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China; 2. Key Laboratory of Soft Soils and Geoenvironmental Engineering of Ministry of Education, Zhejiang University, Hangzhou 310027, China; 3. Yellow River Conservancy Commission，Zhengzhou 450003, China; 4. East China Electric Power Design Institute, Shanghai 200063, China

摘要

    摘要
  • 摘要: 深基坑开挖会改变桩周土的应力状态，影响抗拔桩的承载力。通过离心机模型试验，研究了超深开挖对抗拔桩承载力的影响。采用考虑基底土超固结效应影响的有限元数值模拟分析方法，对离心机试验进行了计算分析，研究超深开挖对抗拔桩承载力影响的内在机理。研究结果表明：坑内土体卸荷，桩侧土体有效应力降低，抗拔桩承载力下降；受基底土超固结效应的影响，桩侧土静止土压力系数要大于正常固结状态，桩侧极限摩阻力与抗拔桩承载力大于正常固结状态；不考虑基坑开挖对桩周土应力水平的影响，以覆土条件下的承载力做为设计取值，偏于不安全；考虑基坑开挖对桩周土应力水平的影响，但不考虑基底土的超固结特性，抗拔桩承载力的取值偏于保守。
    Abstract: The stress state of the soil around piles and the bearing capacity of uplift piles will be changed by deep excavation. Through centrifuge tests, the effects of ultra-deep excavation on the bearing capacity of uplift piles are analyzed. Using the finite element numerical simulation analysis method which takes the effects of over consolidation into account, the centrifuge tests are calculated, and the mechanism of the effects of ultra-deep excavation on bearing characteristics of uplift piles is analyzed. The results show that under the influence of over consolidation of base soil, the coefficient of earth pressure, the pile-side ultimate friction resistance and the bearing capacity of uplift piles are larger than those under normal consolidation. If the effects of pit excavation on stress level of soil are not considered, it will be unsafe to take the bearing capacity as design value. If the effects of pit excavation on stress level of the soil around piles are taken into account, while the capacity of over consolidation is not considered, the bearing capacity of uplift piles will be underestimated.
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    • 参考文献(15)
  • [1] 黄茂松),任 青,(王卫东),等. 深层开挖条件下抗拔桩极限承载力分析[J]. (岩土工程学报), 2007,29(11):1689-1695. (HUANG Mao-song, REN Qing, WANG Wei-dong, et al. Analysis for ultimate uplift capacity of tension piles under deep excavation[J]. Chinese Journal of Geotechnical Engineering,2007,29(11): 1689-1695. (in Chinese)
    [2] 黄茂松),(郦建俊),(王卫东),等. 开挖条件下抗拔桩的承载力损失比分析[J]. (岩土工程学报), 2008,30(9):1291-1297. (HUANG Mao-song, LI Jian-jun, WANG Wei-dong, et al. Loss ratio of bearing capacity of uplift piles under deep excavation[J]. Chinese Journal of Geotechnical Engineering,2008,30(9): 1291-1297. (in Chinese)
    [3] 胡 琦,(凌道盛),(陈云敏),等. 深基坑开挖对坑内基桩受力特性的影响分析[J]. (岩土力学), 2008,29(7):1965-1970. (HU Qi, LING Dao-sheng, CHEN Yun-min, et al. Study of loading characters of pile foundation due to unloading of deep foundation pit excavation[J]. Rock and Soil Mechanics,2008,29(7): 1965-1970. (in Chinese)
    [4] 陈锦剑),(王建华),范 巍,等. 抗拔桩在大面积深开挖过程中的受力特性分析[J]. (岩土工程学报), 2009,31(3):402-407. (CHEN Jin-jian, WANG Jian-hua, FAN Wei, et al. Behavior of up-lift pile foundation during large-scale deep excavation[J]. Chinese Journal of Geotechnical Engineering,2009,31(3): 402-407. (in Chinese)
    [5] 郑 刚,刁 钰,(吴宏伟). 超深开挖对单桩的竖向荷载传递及沉降的影响机理有限元分析[J]. (岩土工程学报), 2009,31(6):837-845. (ZHENG Gang, DIAO Yu, NG C W W. Finite element analysis on mechanism of effect of extra-deep excavation on vertical load transfer and settlement of a single pile[J]. Chinese Journal of Geotechnical Engineering,2009,31(6): 837-845. (in Chinese)
    [6] 郦建俊),(黄茂松),(王卫东),等. 开挖条件下抗拔桩承载力的离心模型试验[J]. (岩土工程学报), 2010,32(3):388-396. (LI Jian-jun, HUANG Mao-song, WANG Wei-dong, et al. Centrifugal model tests on bearing capacity of uplift piles under deep excavtion[J]. Chinese Journal of Geotechnical Engineering,2010,32(3): 388-396. (in Chinese)
    [7] 罗耀武),胡 琦,(陈云敏),等. 基坑开挖对抗拔桩极限承载力影响的模型试验研究[J]. (岩土工程学报), 2011,33(3):427-432. (LUO Yao-wu, HU Qi, CHEN Yun-min, et al. Model tests on ultimate uplift capacity of piles under excavation[J]. Chinese Journal of Geotechnical Engineering,2011,33(3): 427-432. (in Chinese)
    [8] MAYNE P W, KULHAWY F H. K 0-OCR relationship in soil[J]. Journal of Geotechnical Engineering Division, American Society of Civil Engineering,1982, 108(6):851-872.
    [9] MOCHTAR B, EDIL B. Shaft resistance of model Pile in clay[J]. Journal of Geotechnical Engineering, 1988,114(11):1227-1243.
    [10] 罗耀武). 大面积深开挖对抗拔桩承载性状的影响研究[D]. 杭州: 浙江大学, 2011.(LUO Yao-wu.
    The influence of large and deep excavation on the bearing behavior of uplift piles[D]. Hangzhou: Zhejiang University, 2011.( (in Chinese))
    [11] DUNEAN J M,SEED R B Compaction-induced earth pressures under K0-conditions[J]. Journal of Geotechnical Engineering,1986, 112(1): l-22.
    [12] ILAMPARUTHI K, DICKIN E A. The influence of soil reinforcement on the uplift behavior of belled piles embedded in sand[J]. Geotextiles and Geomembranes, 2001,19(1):1-22.
    [13] SAWWAF M E, NAZIR A. The effect of soil reinforcement on pullout resistance of an existing vertical anchor plate in sand[J]. Computers and Geotechnics, 2006,4(1):1-10.
    [14] NG C W W, POULOS H G, CHAN V S H,et al. Effects of tip location and shielding on piles in consolidation groud[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2008,134(9):1245-1260.
    [15] 中国电力工程顾问集团华东电力设计院. 500千伏世博输变电工程可行性研究岩土工程勘测报告[R]. 上海: 中国电力工程顾问集团华东电力设计院, 2003.((East China Electric Power Design Institute of China Power Engineering Consulting Group. Geotechnical engineering investigation report of Expro 500 kV transmission and transformat projection[R]. Shanghai
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出版历程
  • 收稿日期:  2012-07-27
  • 发布日期:  2013-06-19

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