管桩水泥土复合桩荷载传递规律研究

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Abstract The composite pile composed of jet-mixing cement and PHC pipe pile with core concrete(CPCP) is a new kind of composite pile used in soft ground treatment. For practical project，the static load test associated with fiber Bragg grating(FBG) stress tests and numerical simulations was conducted to understand the load transfer mechanism of the composite pile. With the pile tests，the side friction resistance and the tip resistance were measured in terms of axial stresses under different loads. Then the compatible deformation of pipe pile and cement-soil is obtained associated with their stress distribution. The change rule of compression of each segment is also achieved with the imposed top load. Finally，the differences between general pipe pile and CPCP in terms of resistance characteristics were compared. It shows that：(1) load-displacement(Q-s) curve of pile head varies gradually；(2) pipe pile rather than cement-soil bears a majority of structural load，whilst the bearing capacity characteristics of the composite pile are similar to those of the rigidity piles；(3) pile tip resistance takes a rather smaller percentage of the top load，suggesting the same performance as that of friction piles. Distribution of pipe pile and cement-soil friction resistance is similar，about the ratio of CPCP diameter to PHC diameter.

Key words： pile foundations fiber Bragg grating(FBG) load transfer mechanism field test numerical simulations

Received: 13 August 2013

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https://rockmech.whrsm.ac.cn/EN/Y2014/V33/Isl/3068

[1]	李俊才，邓亚光，宋桂华，等. 素混凝土劲性水泥土复合桩承载机制分析[J]. 岩土力学，2009，30(1)：181-185.(LI Juncai，DENG Yaguang，SONG Guihua，et al. Analysis of load-bearing mechanism of composite foundation of plain concrete reinforced cement-soil mixing piles[J]. Rock and Soil Mechanics，2009，30(1)：181-185.(in Chinese)) " target="_blank">
[2]	董平，陈征宙，秦然. 混凝土芯水泥土搅拌桩在软土地基中的应用[J]. 岩土工程学报，2002，24(2)：204-207.(DONG Ping，CHEN Zhengzhou，QIN Ran. Use of concrete-cored DCM pile in soft ground[J]. Chinese Journal of Geotechnical Engineering，2002，24(2)：204-207.(in Chinese))
[3]	丁永君，李进军，刘峨，等. 劲性搅拌桩的荷载传递规律[J]. 天津大学学报，2010，43(6)：530-536.(DING Yongjun，LI Jinjun，LIU E，et al. Load transfer mechanism of reinforced mixing pile[J]. Journal of Tianjin University，2010，43(6)：530-536.(in Chinese)) " target="_blank">
[4]	李进军，丁永君，李辉，等. 劲性搅拌桩的优化设计[J]. 建筑科学，2007，23(7)：101-103，107.(LI Jinjun，DING Yongjun，LI Hui，et al. The optimization design of reinforced mixing piles[J]. Building Science，2007，23(7)：101-103，107.(in Chinese)) " target="_blank">
[5]	刘汉龙，任连伟，郑浩，等. 高喷插芯组合桩荷载传递机制足尺模型试验研究[J]. 岩土力学，2010，31(5)：1 395-1 401.(LIU Hanlong，REN Lianwei，ZHENG Hao，et al. Full-scale model test on load transfer mechanism for jet grouting soil-cement-pile strengthened pile[J]. Rock and Soil Mechanics，2010，31(5)：1 395-1 401.(in Chinese)) " target="_blank">
[6]	任连伟，刘希亮，王光勇，等. 高喷插芯组合单桩荷载传递简化计算分析[J]. 岩石力学与工程学报，2010，29(6)：1 279-1 287.(REN Lianwei，LIU Xiliang，WANG Guangyong，et al. Simplified calculation and analysis of load transfer behavior for single JPP[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(6)：1 279-1 287. (in Chinese)) " target="_blank">
[7]	任连伟，张华东，郑浩，等. 高喷插芯组合群桩竖向承载特性的数值分析[J]. 防灾减灾工程学报，2009，29(4)：438-443.(REN Lianwei，ZHANG Huadong，ZHENG Hao，et al. Numerical analysis on vertical bearing behavior of JPP pile group[J]. Journal of Disaster Prevention and Mitigation Engineering，2009，29(4)：438-443.(in Chinese)) " target="_blank">
[8]	宋义仲，马凤生，赵西久，等. 填芯管桩水泥土复合基桩的施工方法[P]. 中国：CN102127910A，2011-07-20.(SONG Yizhong，MA Fengsheng，ZHAO Xijiu，et al. The construction method of the composite pile composed of jet-mixing cement and PHC pile with core concrete[P]. China：CN102127910A，2011-07-20.(in Chinese)) " target="_blank">
[9]	宋义仲，程海涛，卜发东，等. 管桩水泥土复合基桩工程应用研究[J]. 施工技术，2012，41(5)：89-91，99.(SONG Yizhong，CHENG Haitao，BU Fadong，et al. Study on engineering application of composite pile made up of jet-mixing cement and PHC with core concrete[J]. Construction Technology，2012，41(5)：89-91，99.(in Chinese)) " target="_blank">
[10]	宋义仲，卜发东，程海涛，等. 管桩水泥土复合基桩承载性能试验研究[J]. 工程质量，2012，30(5)：12-16.(SONG Yizhong，BU Fadong，CHENG Haitao，et al. Experimental study on bearing properties of tubular cement composite pile[J]. Construction Quality，2012，30(5)：12-16.(in Chinese)) " target="_blank">
[11]	魏广庆，施斌，贾建勋，等. 分布式光纤传感技术在预制桩基桩内力测试中的应用[J]. 岩土工程学报，2009，31(6)：911-916.(WEI Guangqing，SHI Bin，JIA Jianxun，et al. Application of distributed optical fiber sensing to testing inner force of prefabricated piles[J]. Chinese Journal of Geotechnical Engineering，2009，31(6)：911-916.(in Chinese))
[12]	HONG Chengyu，YIN Jianhua，JIN Wei，et al. Comparative study on the elongation measurement of a soil nail using optical lower coherence interferometry method and FBG method[J]. Advances in Structural Engineering，2010，13(2)：309-319. " target="_blank">
[13]	ZHU H H，YIN J H，ZHANG L，et al. Monitoring internal displacements of a model dam using innovative FBG sensing bars[J]. Advances in Structural Engineering，2010，13(2)：249-261. " target="_blank">
[14]	朱鸿鹄，殷建华，靳伟，等. 基于光纤光栅传感技术的地基基础健康监测研究[J]. 土木工程学报，2010，43(6)：109-115.(ZHU Honghu，YIN Jianhua，JIN Wei，et al. Health monitoring of a foundation using fiber Bragg grating sensor technology[J]. China Civil Engineering Journal，2010，43(6)：109-115.(in Chinese)) " target="_blank">
[15]	鲍鹏，姜忻良，盛桂琳. 劲性搅拌桩复合地基承载性能静动力分析[J]. 岩土力学，2007，28(1)：63-68.(BAO Peng，JIANG Xinliang，SHENG Guilin. Static and dynamic analysis of bearing capacity of composite foundation of concrete core mixing piles[J]. Rock and Soil Mechanics，2007，28(1)：63-68.(in Chinese)) " target="_blank">