厚砂层钻孔灌注桩成孔泥浆配比分析
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摘要
结合武汉二七长江大桥配套工程钻孔灌注桩的施工,介绍了钻孔灌注桩护壁泥浆的成分及其作用,指出应根据不同地质条件配制不同比例的泥浆.针对本工程地质的特厚砂层情况,有意识地进行了泥浆配比试验,并根据桩基完整性与泥浆成分配比分析,得到了适合本工程地质的泥浆配比,以积累钻孔灌注桩在厚砂层施工的经验.
Combining with the construction of bored piles in Wuhan Yangtze River Bridge auxiliary projects of Er Qi road,the composition of bored piles slurry and its function are introduced;and it is pointed out that should prepare different mixing ratios of slurry according to different geological conditions.For the engineering geological conditions of thick sand,slurry mixing ratio test is carried out;and based on the integrity of the pile and slurry chemical composition analysis,engineering geology have been appropriate for the mixing ratio of slurry to accumulate experience of bored piles construction in thick sand layer.
Combining with the construction of bored piles in Wuhan Yangtze River Bridge auxiliary projects of Er Qi road,the composition of bored piles slurry and its function are introduced;and it is pointed out that should prepare different mixing ratios of slurry according to different geological conditions.For the engineering geological conditions of thick sand,slurry mixing ratio test is carried out;and based on the integrity of the pile and slurry chemical composition analysis,engineering geology have been appropriate for the mixing ratio of slurry to accumulate experience of bored piles construction in thick sand layer.
引文
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[10]陈飞,黄晓琴.武汉天兴洲长江大桥大直径钻孔灌注桩施工技术[J].施工技术,2008,37(增刊):212-214.
[11]周国钧,牛青山编译.灌注桩设计施工手册[M].北京:地震出版社,1991:231-232.
[12]JTJ041-2000,公路桥涵施工技术规范[S].
[2]林才奎.钻孔灌注长大桩基的施工探讨[D].成都:西南交通大学,1999:50-80.
[3]刘自明.桥梁深水基础[M].北京:人民交通出版社,2003.
[4]Davis A G.The nonde structive impulse response testin North America[J].NDT&E International,2003,36(4):185-193.
[5]Zhang L M,TANG W H.Reliability of bored pilefoundations considering bias in failure criteria[J].Geotechnical Journal,2005,42(4):1086-1093.
[6]Garg K G.Bored pile groups under vertical load insand[J].Journal o f the Geotechnical Engineering Di-vision,1979,105(8):939-956.
[7]王中文.钻孔灌注桩孔壁稳定性的影响因素研究[J].公路交通科技,2011,28(1):86-90.
[8]熊茂平.泥浆性能对超深大直径灌注桩成孔效率与成桩质量的分析[J].施工技术,2005,34(1):37-39.
[9]周红波,陈竹昌.施工规范对钻孔桩泥浆性能的规定与分析[J].施工技术,2006,35(1):41-43.
[10]陈飞,黄晓琴.武汉天兴洲长江大桥大直径钻孔灌注桩施工技术[J].施工技术,2008,37(增刊):212-214.
[11]周国钧,牛青山编译.灌注桩设计施工手册[M].北京:地震出版社,1991:231-232.
[12]JTJ041-2000,公路桥涵施工技术规范[S].
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