郑振鹏，郑仁光，周成功

（上海市城市建设设计研究总院，上海 200125）

 

[摘要] 泉州火车站站前大桥桥头堡地面下20m范围内存在严重液化土层，当基础采用桩基时，在设防地震或罕遇地震作用下，上部土层可能会完全液化，对桩身上部无法提供弹性抗力，此时的桩基实际上已成为高承台桩。针对此种情况，借助MIDAS/Gen程序建立了桩与上部结构整体分析模型，对桩基进行了水平地震作用下的力学分析，结果与采用《建筑桩基技术规范》（JGJ 94—2008）的计算值相吻合。

[关键词] 液化场地；桩与上部结构；共同作用；高承台桩基

中图分类号：TU473-1文献标识码：A文章编号：1002-848X(2012)10-0136-03

 

Zheng Zhenpeng, Zheng Renguang, Zhou Chenggong

(Shanghai Urban Construction Design & Research Institute, Shanghai 200125, China)

 

Abstract: Serious liquefiable soil is distributed in 20m underground of Quanzhou Railway Station's front bridgehead. Under the action of frequent earthquake or rare earthquake, the upper soil would be completely liquefiable and can not provide elastic resistance to pile foundation in the serious liquefiable site. Therefore, the pile will become tall platform pile. According to this case, the pile-upper structure interactive element model was established by finite element software MIDAS/Gen and mechanics analysis of the pile was conducted under horizontal earthquake. It shows that the results calculated by MIDAS/Gen agree well with that calculated by Technical code for building pile foundation (JGJ 94—2008).

Keywords: liquefiable site; pile foundation and upper structure; interaction; tall platform pile

作者简介：郑振鹏，高级工程师，一级注册结构工程师，Email：z_z_p@163.com。

 

［1］泉州市站前大桥工程——南北桥头堡工程岩土工程勘察报告(详勘)［R］.上海：上海市城市建设设计研究院，2009.

［2］GB 50011-2001 建筑抗震设计规范［S］.2008年版. 北京：中国建筑工业出版社，2008.

［3］JGJ 94-2008 建筑桩基技术规范［S］.北京：中国建筑工业出版社，2008.