| 太平特大桥后压浆钻孔灌注桩承载特性试验研究 |
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| 引用本文： | 周儒夏,龚维明,穆腾飞.太平特大桥后压浆钻孔灌注桩承载特性试验研究[J].工业建筑,2011(Z1):422-427. |
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| 作者姓名： | 周儒夏 龚维明 穆腾飞 |
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| 作者单位： | 东南大学混凝土及预应力混凝土结构教育部重点实验室; |
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| 基金项目： | “十一五”国家科技支撑计划项目(2008BAG07B01) |
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| 摘 要： | 广深沿江高速公路太平特大桥梁基础采用直径2.0 m、长90 m左右的钻孔灌注桩。通过实测数据采集,对两根试桩在压浆前后的荷载-沉降关系、竖向承载特性、桩侧摩阻力及其与桩土间相对位移关系、桩端阻力等方面进行对比分析。结果表明,压浆后桩极限承载力测试值提高幅度分别为36.88%、36.52%,其中总侧阻力提高23.56%、28.32%,总端阻力提高60.67%、66.46%;桩端阻力所占比重分别为23.82%、26.22%,说明该嵌岩桩为端承型摩擦桩;压浆前后试桩都没有达到承载力极限状态,桩基承载力有较大富余。
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| 关 键 词： | 后压浆 承载特性 侧阻力 端阻力 |
TEST RESEARCH ON BEARING CAPACITY CHARACTER OF POST-GROUTING PILES FOR TAIPING BRIDGE |
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| Zhou Ruxia Gong Weiming Mu Tengfei.TEST RESEARCH ON BEARING CAPACITY CHARACTER OF POST-GROUTING PILES FOR TAIPING BRIDGE[J].Industrial Construction,2011(Z1):422-427. |
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| Authors: | Zhou Ruxia Gong Weiming Mu Tengfei |
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| Affiliation: | Zhou Ruxia Gong Weiming Mu Tengfei(Key Laboratory of R.C.&P.C.Structures of Ministry of Education,Southeast University,Nanjing 210096,China) |
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| Abstract: | The bored piles 2.0 m in diameter and 90 m in length were adopted in the foundation under Guangzhou-Shenzhen Expressway along the Taiping Bridge.Through collecting the experimental data,some bearing characteristics of test piles,such as load-displacement relationship,axial bearing properties,pile side friction and its relative displacement between pile and soil,and tip resistance were analysed.It was indicated that,after grouting to improve the value of ultimate bearing capacity test range was 36.88%,36.52%... |
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| Keywords: | post-grouting bearing behavior side frictional resistance tip resistance |
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