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濕陷性黃土地區(qū)某高層建筑長(zhǎng)短樁復(fù)合地基現(xiàn)場(chǎng)試驗(yàn)研究*
翟曉力1,2,葛忻聲1,張黎明1,白曉紅1
摘 要
翟曉力1,2,葛忻聲1,張黎明1,白曉紅1
 (1 太原理工大學(xué)建筑與土木工程學(xué)院,太原 030024; 2 山西水利職業(yè)技術(shù)學(xué)院,太原 030027)
 
[摘要]以太原某采用長(zhǎng)短樁復(fù)合地基的高層建筑在濕陷性黃土場(chǎng)地上開(kāi)展的現(xiàn)場(chǎng)試驗(yàn)所得到數(shù)據(jù)為依據(jù),分析了荷載作用下樁-土共同作用及地基變形情況。詳細(xì)討論了基底下長(zhǎng)短樁及地基土應(yīng)力、樁-土應(yīng)力比、荷載分擔(dān)比和長(zhǎng)短樁樁身軸力隨上部荷載變化的分布規(guī)律,以及長(zhǎng)短樁復(fù)合地基的變形組成及其各組成部分之間的關(guān)系隨上部荷載變化的規(guī)律,為長(zhǎng)短樁復(fù)合地基的理論研究和優(yōu)化設(shè)計(jì)提供參考。
[關(guān)鍵詞]濕陷性黃土地區(qū);高層建筑;長(zhǎng)短樁復(fù)合地基;承載性狀;變形機(jī)理
中圖分類號(hào):TU475+.3      文獻(xiàn)標(biāo)識(shí)碼:A      文章編號(hào):1002-848X(2013)10-0084-05
 
In-situ test study on the long-short-pile composite foundation of a high-rise building in collapsible loess area
Zhai Xiaoli1,2, Ge Xinsheng1, Zhang Liming1, Bai Xiaohong1
 (1 Architecture and Civil Engineering College, Taiyuan University of Technology, Taiyuan 030024, China; 2 Shanxi Conservancy Technical College, Taiyuan 030027, China)
 
Abstract: Based on the data from in-situ tests of the long-short-pile composite foundation of a high-rise building in collapsible loess area in Taiyuan, the pile-soil interaction and foundation deformation were analyzed. Detailed discussion was given to the stress of the long-short pile and of the foundation soil, as well as pile-soil stress ratio, load-sharing ratio, and axial force of long and short piles as the upper load changes. In addition, the deformation components of the long-short-pile composite foundation and the variation of the relationship between the components when the upper load changes were also analyzed, which can be references for the theoretical study and optimal design of long-short-pile composite foundations.
Keywords: collapsible loess area; high-rise building; long-short-pile composite foundation; bearing behaviour; deformation mechanism
*國(guó)家自然科學(xué)基金項(xiàng)目(50678110)。
作者簡(jiǎn)介:翟曉力,博士研究生,講師,Email:zhaixiaoli2000@163.com。
 
參考文獻(xiàn)
[1]葛忻聲,龔曉南,張先明.長(zhǎng)短樁復(fù)合地基有限元分析
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[2]朱奎.剛\|柔性樁復(fù)合地基特性研究[D].杭州:浙江大學(xué),2006.
[3]馬驥,張東剛,張震,等.長(zhǎng)短樁復(fù)合地基設(shè)計(jì)計(jì)算[J].巖土工程技術(shù),2001(2):86-91.
[4]葛忻聲,龔曉南,張先明.長(zhǎng)短樁復(fù)合地基設(shè)計(jì)計(jì)算方法的探討[J]. 建筑結(jié)構(gòu),2002,32(7):3-7.
[5]陳龍珠,梁發(fā)云,黃大治,等.高層建筑應(yīng)用長(zhǎng)短樁復(fù)合地基的現(xiàn)場(chǎng)試驗(yàn)研究[J]. 巖土工程學(xué)報(bào),2004,26(2):167-171.
[6]陳龍珠,梁發(fā)云,嚴(yán)平,等.帶褥墊層剛柔性樁復(fù)合地基工程性狀的試驗(yàn)研究[J].建筑結(jié)構(gòu)學(xué)報(bào),2004,25(3):125-129.
[7]朱奎,徐日慶.帶褥墊層剛柔性樁復(fù)合地基性狀試驗(yàn)研究[J]. 建筑結(jié)構(gòu)學(xué)報(bào),2006,27(5):123-128.
[8]林本海,方輝.長(zhǎng)短樁高強(qiáng)復(fù)合地基的承載模型研究[J]. 巖石力學(xué)與工程學(xué)報(bào),2009,28(S2):3857-3862.
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