Field Experimental Research on Bearing Capacity of Cast-in-Situ Piles in Xigeda-Rock
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摘要: 为向建设中的西昌攀枝花高速公路桥梁桩基础设计提供参考(该高速公路沿线约90 km路段通过岩性软弱、遇水易泥化和崩解的昔格达岩层),在攀枝花地区新九和安宁河流域德昌蒲坝的昔格达岩层中对13根灌注桩进行了单桩轴向静载试验,研究了桩的承载力和影响承载力的因素.结果表明,昔格达岩层可以作为桩基础的持力层,但应保证桩的施工质量.Abstract: To provide a reference for the design of pile foundations of bridges on the Xichang-Panzhihua expressway being constructed,the static loading tests and researches on the axial bearing capacity of 13 cast-in-situ piles set in Xigeda-rock were carried out at Xinjiu in Panzhihua and at Puba in Dechang.Xigeda-rock is an extremely soft rock with the special behaviors of softening,mashing and collapsing due to water,and this kind of rock abounds in a region as long as 90 km along this expressway.The experimental and research results show that Xigeda-rock can be used as the ground of pile foundations,and the construction quality is extremely important to their bearing capacity.
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Key words:
- xigeda-rock /
- soft rock /
- cast-in-situ pile /
- static loading test /
- bearing capacity
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交通部公路规划设计院.JTJ024-85公路桥涵地基与基础设计规范[S]. 北京:人民交通出版社,1985. 中国建筑科学研究院.JGJ94-94建筑桩基技术规范[S]. 北京:中国建筑工业出版社,1995. 张永治.攀西地区昔格达土综述[J]. 攀枝花大学学报,1995,12(2):75-78.ZHANG Yongzhi.Summarization of Xigeda soil in Panzhihua-Xichang region[J]. Journal of Panzhihua University,1995,12(2):75-78. 中国建筑科学研究院.JGJ106-2003建筑基桩检测技术规范[S]. 北京:中国建筑工业出版社,2003. 史佩栋,梁晋渝.嵌岩桩竖向承载力的研究[J]. 岩土工程学报,1994,16(4):32-39.SHI Peidong,LIANG Jinyu.Vertical bearing capacity of rock-socketed piles[J]. Chinese Journal of Geotechnical Engineering,1994,16(4):32-39. DELPEAK R,OMER J R,ROBINSON R B.Load/settlement prediction for large-diameter bored piles in Mercia mudstone[J]. Geotechnical Engineering,2000,143(10):201-224. 徐松林,吴文,吴玉山,等.软岩中混凝土灌注桩荷载传递初步分析[J]. 岩土力学,1998,19(1):75-80.XU Songlin,WU Wen,WU Yushan,et al.Preliminary analysis of load transfer behavior of concrete rock-socketed piles in soft rock[J]. Rock and Soil Mechanics,1998,19(1):75-80. -
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