| 基于岩溶顶板冲切破坏的桥梁桩基承载力分析 |
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| 引用本文： | 戴若琪,谢上飞,贺炜.基于岩溶顶板冲切破坏的桥梁桩基承载力分析[J].中南公路工程,2013(3):34-37,52. |
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| 作者姓名： | 戴若琪 谢上飞 贺炜 |
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| 作者单位： | [1]湖南路桥建设集团公司,湖南长沙410004 [2]湖南省交通科学研究院,湖南长沙410015 [3]长沙理工大学土木与建筑学院,湖南长沙410114 |
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| 基金项目： | 湖南交通科技项目（200904） |
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| 摘 要： | 张家界至花垣高速公路是位于我国西部山区。工程建设中,遇到大量的岩溶问题,结合张花高速岩溶区桥梁桩基承载力问题,考虑桩端下伏岩溶顶板冲切破坏模式,对岩溶顶板对桥梁桩基的承载性能的影响进行了分析,提出了桩端下伏岩溶顶板厚度与桩体承载力的关系,并结合十标段大岩屋1号桥3#墩处桩基资料,给出了评估结果,并在算例基础上进行了参数分析,结果表明增大桩径可使桩体承载力提高,但并不明显,顶板岩体强度与人为设定的安全系数K对桩基承载力影响较大。
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| 关 键 词： | 桥梁工程 桩基础 岩溶 承载力 冲切破坏 |
Bearing Capacity Analysis of Bridge Pile based on Punching Failure Mode of Karst Roof |
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| DAI Ruoqi,XIE Shangfei,HE Wei.Bearing Capacity Analysis of Bridge Pile based on Punching Failure Mode of Karst Roof[J].Central South Highway Engineering,2013(3):34-37,52. |
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| Authors: | DAI Ruoqi XIE Shangfei HE Wei |
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| Institution: | 1.Hunan road ＆ bridge construction group corporation,Changsha,Hunan 410004,China;2.Hunan Communications Research Institute,Changsha,Hunan,410015,China;3.School of Civil ＆ Architecture,Changsha University of Science ＆ Technology,Changsha,Hunan,410114,China) |
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| Abstract: | Zhangjiajie to Huayuan’s highway is located in the western mountains in China.There are lots of problems of karst in situ.Based on the problem of the bearing capacity of bridge pile foundation in karst area of zhanghua highway,bearing capacity of bridge pile foundation in karst roof is analyzed by thinking of punching shear failure mode of karst roof under pile.And the relation between the thickness of karst roof under pile and bearing capacity of bridge pile foundation is proposed.Taking the data of Dayanwu 1# bridge 3# pier into account,Parameter analysis is obtained.It shows that increasing pile diameter can make improve pile bearing capacity,but it is not obvious,the safety factor of roof rock mass strength and artificial K had a greater influence on the bearing capacity of pile foundation. |
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| Keywords: | bridge engineering pile foundation karst bearing capacity punching failure |
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