| 增强型管桩和普通管桩受力性能试验对比研究 |
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| 引用本文： | 付贵海,魏丽敏,郭志广.增强型管桩和普通管桩受力性能试验对比研究[J].水文地质工程地质,2012,39(3):60-64. |
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| 作者姓名： | 付贵海 魏丽敏 郭志广 |
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| 作者单位： | 1. 中南大学土木工程学院,长沙410075;湖南城市学院土木工程学院,益阳413000
2. 中南大学土木工程学院,长沙,410075 |
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| 基金项目： | 铁道部科技研究开发计划重点课题(2009G008-B),铁道部科技研究开发计划项目(2010G018-E-3);湖南省教育厅青年项目(11B025) |
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| 摘 要： | 通过对桩身预埋有混凝土应变计的普通光圆预应力管桩和增强型预应力管桩的静载对比试验,比较了两种桩的荷载-沉降曲线、桩身轴力分布情况、桩侧摩阻力及桩端阻力的发挥性状,研究了增强型管桩荷载传递规律及桩身环向凸肋的荷载分担情况.结果表明,由于环向凸肋的存在,使增强型管桩在桩周形成的剪切破坏面比普通管桩更大,从而提高了增强型管桩的承载能力.在最大试验荷载作用时,增强型管桩的侧摩阻力要比普通管桩高27.4％～39.5％.
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| 关 键 词： | 普通管桩 增强型管桩 荷载传递 桩侧摩阻力 桩端阻力 环向凸肋 |
Contrastive experimental analysis of bearing behaviors of ordinary pipe pile and enhanced pipe pile |
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| FU Gui-hai
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WEI Li-min
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GUO Zhi-guang.Contrastive experimental analysis of bearing behaviors of ordinary pipe pile and enhanced pipe pile[J].Hydrogeology and Engineering Geology,2012,39(3):60-64. |
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| Authors: | FU Gui-hai WEI Li-min GUO Zhi-guang |
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| Affiliation: | 1(1.College of Civil Engineering,Central South University,Changsha 410075,China; 2.College of Civil Engineering,Hunan City University,Yiyang 413000,China) |
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| Abstract: | Based on the static loading tests on ordinary pipe pile and enhanced pipe pile with concrete strain gauges mounted in them,the load transferring mechanism and load sharing of flange rib of enhanced pipe pile are studied through comparing the load-settlement curves,axial load distribution,behaviors of skin resistance and base resistance of two types of piles.Experimental results show that the shear fracture surface around enhanced pipe pile is greater than that of ordinary pipe pile,and the flange ribs of enhanced pipe pile remarkably reinforce skin resistance of pile.Under the maximal load,the skin resistance of enhanced pipe pile is 27.4%~39.5% more than the one of ordinary pipe pile.The experimental results also provide some important references for theoretical research and technical application of enhanced pipe pile. |
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| Keywords: | ordinary pipe pile enhanced pipe pile load transfer skin resistance base resistance annular flange rib |
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