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鄭振鵬，鄭仁光，周成功

（上海市城市建設(shè)設(shè)計研究總院，上海 200125）

 

[摘要] 泉州火車站站前大橋橋頭堡地面下20m范圍內(nèi)存在嚴(yán)重液化土層，當(dāng)基礎(chǔ)采用樁基時，在設(shè)防地震或罕遇地震作用下，上部土層可能會完全液化，對樁身上部無法提供彈性抗力，此時的樁基實際上已成為高承臺樁。針對此種情況，借助MIDAS/Gen程序建立了樁與上部結(jié)構(gòu)整體分析模型，對樁基進(jìn)行了水平地震作用下的力學(xué)分析，結(jié)果與采用《建筑樁基技術(shù)規(guī)范》（JGJ 94—2008）的計算值相吻合。

[關(guān)鍵詞] 液化場地；樁與上部結(jié)構(gòu)；共同作用；高承臺樁基

中圖分類號：TU473-1文獻(xiàn)標(biāo)識碼：A文章編號：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

作者簡介：鄭振鵬，高級工程師，一級注冊結(jié)構(gòu)工程師，Email：z_z_p@163.com。

 

［1］泉州市站前大橋工程——南北橋頭堡工程巖土工程勘察報告(詳勘)［R］.上海：上海市城市建設(shè)設(shè)計研究院，2009.

［2］GB 50011-2001 建筑抗震設(shè)計規(guī)范［S］.2008年版. 北京：中國建筑工業(yè)出版社，2008.

［3］JGJ 94-2008 建筑樁基技術(shù)規(guī)范［S］.北京：中國建筑工業(yè)出版社，2008.