| 大型嵌岩桩底基岩侧向承载性状试验 |
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| 引用本文： | 陈伟,莫海鸿,陈晓斌,陈乐求.大型嵌岩桩底基岩侧向承载性状试验[J].科技导报(北京),2009,27(15):59-63. |
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| 作者姓名： | 陈伟 莫海鸿 陈晓斌 陈乐求 |
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| 作者单位： | 陈伟(华南理工大学土木交通学院,广州,510641;广州市建筑科学研究院,广州,510440);莫海鸿(华南理工大学土木交通学院,广州,510641);陈晓斌(广州市建筑科学研究院,广州,510440;中南大学土木建筑学院,长沙,410075);陈乐求(中南大学地学与环境工程学院,长沙,410083) |
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| 基金项目： | 广州市科技局基金项目 |
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| 摘 要： | 采用经验方法确定的桩侧极限摩阻力结果存在较大误差.选取广州新电视塔C区的4个挖孔桩底基岩进行混凝土短柱和基岩摩擦试验.对桩在受压、受拉不同应力状态下的摩擦力进行分析,获得桩和岩层摩擦承载力指标.试验研究表明,桩和围岩摩阻力在不同受力状态下表现出不同性质,抗压摩阻力特征值普遍大于抗拔摩阻力特征值.定义了抗拔分项系数γ作为抗拔力计算安全储备,建议γ为1.7～2.0,试验研究成果可为重大工程提供参考.
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| 关 键 词： | 桩基础:嵌岩桩 荷载试验:承载性能 摩擦力特征值 |
Experimental Studies on Large Rock Socketed Pile's Confining Bearing Properties in the Pile Bottom |
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| CHEN Wei,MO Haihong,CHEN Xiaobin,CHEN Leqiu .School of Civil Engineering , Transportation,South China of Technology University,Guangzhou ,China .Guangzhou Institute of Building Science,Guangzhou ,China .School of Civil Engineering,Central South University,Changsha ,China .School of Geology , Environment Engineering,Changsha ,China.Experimental Studies on Large Rock Socketed Pile''s Confining Bearing Properties in the Pile Bottom[J].Science & Technology Review,2009,27(15):59-63. |
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| Authors: | CHEN Wei MO Haihong CHEN Xiaobin CHEN Leqiu School of Civil Engineering Transportation South China of Technology University Guangzhou China Guangzhou Institute of Building Science Guangzhou China School of Civil Engineering Central South University Changsha China School of Geology Environment Engineering Changsha China |
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| Institution: | CHEN Wei1,2,MO Haihong1,CHEN Xiaobin2,3,CHEN Leqiu4 1.School of Civil Engineering , Transportation,South China of Technology University,Guangzhou 510641,China 2.Guangzhou Institute of Building Science,Guangzhou 510440,China 3.School of Civil Engineering,Central South University,Changsha 410075,China 4.School of Geology , Environment Engineering,Changsha 410083,China |
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| Abstract: | The estimation of the rock-socketed piles' confining bearing capacity by empirical methods always involves large error.So an in-situ method is preferred in important engineering projects.The experimental studies on large rock socketed pile's confining bearing capacity properties were carried out in the dug piles' bottom at construction zone C of Guangzhou new television station tower site.The short concrete piles were used to simulate the real piles,and the confining friction force between the short pile an... |
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| Keywords: | pile foundations rock-socketed pile load test bearing properties friction eigenvalue |
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