为研究高桩码头桩基受力及结构损伤，对某高桩码头3类典型断面进行有限元数值模拟，并对基桩进行承载力计算分析;之后，将数值模拟结果与现场桩基结构损伤检测结果作比较，二者吻合较好，从而验证了理论分析的正确性，并最终给出受损部位的加固措施。根据基桩承载力有限元分析及实测结果，可以断定基桩顶部(距桩帽下方1~2 m)为最易受损部位;对于码头3种断面类型，应尽量避免使用断面1、断面2的形式，原因是这2类断面的水平承载力太小，极易受水平力作用而在使用过程中发生损坏;提出2种加固基桩受损部位的措施，增大桩帽截面法和钢抱箍法，但在具体修复时，应根据实际情况在考虑时间因素、经济效益的前提下，认真总结比较这2种措施的优缺点，灵活选用修复措施，对桩基受损部位进行妥善处理。
Abstract
In order to study the stress and structural damage of high-piled wharf, we simulated three kinds of typical sections of a high-piled wharf by using finite element method, and analyzed the pile bearing capacity. Then, we compared the simulated result with the damage detection result of pile foundation structure, and the results coincide with each other, verifying the correctness of theoretical analysis. Finally, we gave the reinforcement measures for the damaged parts. According to the finite element analysis of pile bearing capacity and measured results, we concluded that pile top (1-2 m from beneath the pile cap) is the most vulnerable part. For the three typical types of cross sections, we should try to avoid using the forms of section one and section two. Because the horizontal bearing capacity of the two types of cross section is too small so that the piles are likely to be damaged by horizontal force in the process of use. Besides, we put forward two measures of reinforcing the damage locations of piles by enlarging pile cap section and by steel hoop. But in concrete repair, under the premise of considering time factor and economic benefits,we should flexibly choose repair measures based on summarizing and comparing the advantages and disadvantages of various measures to treat the damaged positions of the piles properly.
关键词
桩基工程 /
高桩码头 /
有限单元法 /
结构损伤 /
承载力分析 /
加固措施
Key words
pile foundations /
high-piled wharf /
finite element method /
structural damage /
bearing capacity analysis /
reinforcement measures
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