广东地区大直径超长钻孔灌注桩荷载传递特性试验研究

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Abstract Based on the large tonnage static load tests of 2 large-diameter and super-long bored piles in Guangdong soft soil area，bearing characteristics and transport mechanism of load are studied in this paper，and the measured results obtained from the tests provide precious data for theoretical research of large-diameter and super-long bored piles in Guangdong area. The results show that load-movement curves of the piles vary gradually. The test piles show the characteristics of friction piles because sharing ratios of pile tip bearing capacity are fewer than 15%. With the increase of pile top load，the increasing rate of relative displacement of piles and soil at certain pile body first increase and then decrease. The ultimate pile-soil relative displacements for completely mobilizing the shaft resistance are found to be about 17mm and 6mm separately in muddy silt clay and silt，22 to 27mm in sand，18mm to 23 in upside silty clay layers of pile. Shaft resistance of upside soil of pile is softened inordinately. The shaft resistance in downside silty clay layers of pile is about more than 87% of ultimate shaft resistance while pile-soil relative displacement is 40mm and increasing rate of the shaft resistance is gently as the relative displacement continues. With the increasing of pile-soil relative displacement，the shaft resistances of weathering sandstone is developing and not fully play finally. Pile side resistance increase as hardening type along with the increasing of pile tip settlement.

Key words： large-diameter and super-long piles slowly ultimate bearing capacity shaft resistance softening pile-soil relative displacement

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https://rockmech.whrsm.ac.cn/EN/Y2015/V34/I04/839

[1]	胡庆立，张克绪. 大直径桩的竖向承载性能研究[J]. 岩土工程学报，2002，24(4)：491-495.(HU Qingli，ZHANG Kexu. Research on axial bearing behavior of large diameter piles[J]. Chinese Journal of Geotechnical Engineering，2002，24(4)：491-495.(in Chinese))
[2]	池跃君，顾晓鲁，周四思，等. 大直径超长灌注桩承载性状的试验研究[J]. 工业建筑，2000，30(8)：26-29.(CHI Yuejun，GU Xiaolu，ZHOU Sisi，et al. Experimental research on bearing behavior of large diameter and super-long bored piles[J]. Industrial Construction，2000，30(8)：26-29.(in Chinese)) " target="_blank">
[3]	朱向荣，方鹏飞，黄洪勉. 深厚软基超长桩工程性状试验研究[J]. 岩土工程学报，2003，25(1)：76-79.(ZHU Xiangrong，FANG Pengfei，HUANG Hongmian. Large tonnage tests on super-long piles in soft soil area[J]. Chinese Journal of Geotechnical Engineering，2003，25(1)：76-79.(in Chinese))
[4]	辛公锋，张忠苗，夏唐代，等. 高荷载水平下超长桩承载性状试验研究[J]. 岩石力学与工程学报，2005，24(3)：2397-2402.(XIN Gongfeng，HANG Zhongmiao，XIA Tangdai，et al. Experimental study on the bearing behaviors of overlength piles under heavy load[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(13)：2397-2402.(in Chinese)) " target="_blank">
[5]	冯世进，柯瀚，陈云敏，等. 黄土地基中超长钻孔灌注桩承载性状试验研究[J].岩土工程学报，2004，26(1)：110-114.(FENG Shijin，KE Han，CHEN Yunmin，et al. Experimental study on super-long bored pile in loess[J]. Chinese Journal of Geotechnical Engineering，2004，26(1)：110-114.(in Chinese))
[6]	赵明华，邹新军，刘齐建. 洞庭湖软土地区大直径超长灌注桩竖向承载力试验研究[J]. 土木工程学报，2004，37(10)：63-67.(ZHAO Minghua，ZOU Xinjun，LIU Qijian. Loading test on the vertical bearing capacity of supper-long and large-diameter bored piles in the soft soil area of Dongting Lake[J]. China Civil Engineering Journal，2004，37(10)：63-67.(in Chinese)) " target="_blank">
[7]	刘福天，赵春风，吴杰，等. 常州地区大直径灌注桩承载性状及尺寸效应试验研究[J]. 岩石力学与工程学报，2010，29(4)：858-865.(LIU Futian，ZHAO CHunfeng，WU Jie，et al. Experimental research on bearing behavior and size effect of large diameter bored cast-in-situ piles in Changzhou area[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(4)：858-865.(in Chinese))
[8]	王卫东，李永辉，吴江斌. 上海中心大厦大直径超长灌注桩现场试验研究[J]. 岩土工程学报，2011，33(12)：1817-1826.(WANG Weidong，LI Yonghui，WU Jiangbin. Field loading tests on large-diameter and super-long bored piles of Shanghai Center Tower[J]. Chinese Journal of Geotechnical Engineering，2011，33(12)：1817-1826.(in Chinese))
[9]	中华人民共和国行业标准编写组. JGJ 106-2003建筑基桩检测技术规范[S]. 北京：中国建筑工业出版社，2003.(The Professional Standards Compilation Group of People’s Republic of China. JGJ 106-2003 Technical code for testing of building foundation piles[S]. Beijing：China Architecture and Building Press，2003.(in Chinese) " target="_blank">
[10]	潘石声，侯学渊. 桩的刚度计算[J]. 岩土工程学报，1996，18(1)：1-6.(PAN Shisheng，HOU Xueyuan. Rigidity computation of pile[J]. Chinese Journal of Geotechnical Engineering，1996，18(1)：1-6.(in Chinese))
[11]	黄明聪，龚晓南，赵善锐. 钻孔灌注长桩试验曲线型式及破坏机制探讨[J]. 铁道学报，1998，20(4)：94-98.(HUANG Mingcong，GONG Xiaonan，ZHAO Shanrui. Styles of test curves and damage mechanism of long bored piles[J]. Journal of the China Railway Society，1998，20(4)：94-98.(in Chinese)) " target="_blank">
[12]	张忠苗，张乾青，张广兴，等. 软土地区大吨位超长试桩试验设计与分析[J]. 岩土工程学报，2011，33(4)：535-543.(ZHANG Zhongmiao，ZHANG Qianqing，ZHANG Guangxing，et al. Large tonnage tests on super-long piles in soft soil area[J]. Chinese Journal of Geotechnical Engineering，2011，33(4)：535-543.(in Chinese))
[13]	俞亚南，冯世挺，宋连峰. 软土地区超长钻孔灌注桩承载性状试验研究[J]. 工业建筑，2002，32(11)：33-35.(YU Yanan，FENG Shiting，SONG Lianfeng. Test study on the super-long bored pile in soft ground[J]. Industrial Construction，2002，32(11)：33-35.(in Chinese)) " target="_blank">
[14]	赵春风，鲁嘉，孙其超，等. 大直径深长钻孔灌注桩分层荷载传递特性试验研究[J]. 岩石力学与工程学报，2009，28(5)：1020-1026.(ZHAO Chunfeng，LU Jia，SUN Qichao，et al. Experimental study of load transmission property of large-diameter bored cast-in-situ deep and long pile in different soil layers[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(5)：1020-1026.(in Chinese)
[15]	蒋建平，章杨松，高广运. 基于现场试验的超长桩端阻力承载性状研究[J]. 工程力学，2010，27(2)：149-160.(JIANG Jianping，ZHANG Yangsong，GAO Guangyun. Study on bearing behaviors of pile tip resistance of super-length piles[J]. Engineering Mechanics，2010，27(2)：149-160.(in Chinese))