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(1 溫州市建筑設(shè)計(jì)研究院； 2 溫州市建設(shè)局； 3 溫州市建筑學(xué)會(huì)； 4 溫州市建筑業(yè)協(xié)會(huì)；溫州 325003)

［摘要］溫州市某采用樁基礎(chǔ)的高層建筑在使用6年后突然出現(xiàn)超常沉降。介紹了該工程采用卸載和錨桿靜壓鋼管樁相結(jié)合的搶險(xiǎn)加固過程。計(jì)算和調(diào)查分析結(jié)果表明，樁基礎(chǔ)承載力嚴(yán)重不足是造成該工程超常沉降的最主要原因；同時(shí)，該工程還存在結(jié)構(gòu)選型不合理、施工質(zhì)量差、使用不當(dāng)?shù)确矫娴膯栴}；臺(tái)灣臺(tái)東地震和大旱引起的水位下降也對(duì)該工程樁基礎(chǔ)的承載能力造成一定影響。

［關(guān)鍵詞］樁基礎(chǔ)；高層建筑；超常沉降；錨桿靜壓鋼管樁；搶險(xiǎn)加固

Emergency reinforcement of pile foundation and analysis of extraordinary settlement of a high-rise building

Zhang Qinghua¹,Jin Guoping¹,Chen Gaolu²,Yang Yihong¹,Han Shaohua³,Huang Zhenguo¹,Zeng Yaohua⁴(1 Wenzhou Architectural Design and Research Institute； 2 Wenzhou Construction Bureau;  3 Wenzhou Architectural Institute； 4 Wenzhou Building Society; Wenzhou 325003，China)

Abstract:A sudden extraordinary settlement occured after a high-rise building with pile foundation has been used for six years in Wenzhou.  The process of emergency reinforcement with unloading and steel pipe pile jacked by anchor bolt was introduced. Calculation and analysis show that the serious shortage of bearing capacity of pile foundation is the main reason for the extraordinary settlement. There are other problems with the building such as the unreasonable selection of structure scheme，the poor quality of construction and the improper use, etc. Taitung earthquake in Taiwan and the declining of water-level caused by droughts in Wenzhou have also affected the bearing capacity of pile foundation.

Keywords:pile foundation; high-rise building; extraordinary settlement; steel pipe pile jacked by anchor bolt; emergency reinforcement

作者簡(jiǎn)介：張清華，教授級(jí)高工，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email:zhang13905776716@163.com。

參考文獻(xiàn)

［1］GB50007—2002 建筑地基基礎(chǔ)設(shè)計(jì)規(guī)范［S］.北京：中國(guó)建筑工業(yè)出版社，2002.

［2］DB33/1001—2003 建筑地基基礎(chǔ)設(shè)計(jì)規(guī)范［S］.杭州：浙江大學(xué)出版社，2003.

［3］GBJ9—87 建筑結(jié)構(gòu)荷載規(guī)范［S］.北京：中國(guó)建筑工業(yè)出版社，1987.

［4］邱國(guó)榮，李正農(nóng)，林勝法，等，溫州城市高層建筑的動(dòng)力特性及地震危險(xiǎn)性研究［R］.溫州市科技局科研項(xiàng)目報(bào)告,2005.

［5］溫州市水雨情信息(1997～2003)［R］.溫州市水文站水情測(cè)報(bào)中心.