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新型混凝土管桩抗弯剪性能试验研究

张忠苗, 刘俊伟, 谢志专, 张日红

张忠苗, 刘俊伟, 谢志专, 张日红. 新型混凝土管桩抗弯剪性能试验研究[J]. 岩土工程学报, 2011, 33(sup2): 271-277.
引用本文: 张忠苗, 刘俊伟, 谢志专, 张日红. 新型混凝土管桩抗弯剪性能试验研究[J]. 岩土工程学报, 2011, 33(sup2): 271-277.
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ZHANG Zhong-miao, LIU Jun-wei, XIE Zhi-zhuan, ZHANG Ri-hong. Experimental study on flexural and shearing properties of modified concrete pipe piles[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(sup2): 271-277.
Citation: ZHANG Zhong-miao, LIU Jun-wei, XIE Zhi-zhuan, ZHANG Ri-hong. Experimental study on flexural and shearing properties of modified concrete pipe piles[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(sup2): 271-277.
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新型混凝土管桩抗弯剪性能试验研究  English Version

  • 1.浙江大学软弱土与环境土工教育部重点实验室,浙江 杭州 310027 ； 2. 浙东建材集团,浙江 宁波 315100

基金项目: 国家自然科学基金项目( 51078338)； 浙江省自然科学基金项目( Y1090610)
详细信息
    作者简介:

    张忠苗 (1961 – ) ,男,浙江宁海人,博士,教授,博士生导师,主要从事基础工程与桩基础研究、教学、检测工作。

  • 中图分类号: TU473

Experimental study on flexural and shearing properties of modified concrete pipe piles

  • 1. Key Laboratory of Soft Soils and Geoenvironmrnt Engineering, Zhejiang University, Hangzhou 310027, China; 2. Zhedong Building Material Group, Ningbo 315100, China

摘要

    摘要
  • 摘要: 创新研发了钢筋加强型预应力混凝土管桩,并进行了抗弯及抗剪性能方面的对比试验研究。抗弯试验发现,非预应力螺纹钢筋的配置较大幅度改善了预应力混凝土管桩的抗弯性能,且预应力钢筋配筋率越低效果越为明显,但抗裂性能没有明显提高。螺纹钢筋的配置明显减小了桩身裂缝的长度和平均宽度,裂缝分布范围及数量有一定幅度的增加。两种类型管桩的主要应力均位于跨中纯弯段内,裂缝出现以前跨中界面应变基本符合平截面假定,裂缝出现后中性轴上移。抗剪试验显示,非预应力螺纹钢筋的配置（或箍筋同时加密）改变了桩身的应力和裂缝分布规律,较大幅度减小了管桩在剪力作用下的变形量,但没有明显提高管桩的抗剪承载力。此创新型管桩在抗弯及抗剪性能方面的优势是明显的。
    Abstract: The flexural and shearing properties of innovativelyinvented reinforced prestressed concrete pipe piles are studied through a comprehensive field test program. The allocations of nonprestressed rolling rebar evidently improve the flexural properties except the cracking resistance, and a larger reinforcement ratio of prestressed steel barleads to a greater improvement. The new technology also reduces the length and average widths of cracks of concrete, whereas expands their distribution to some extent. The stresses of both type piles concentrate on pure bending section. The strain of mid-span cross section accords with the hypothesis of planar section until the concrete cracks and neutral axis moves higher correspondingly. The results of shearing tests show that the allocations of nonprestressed rolling rebar (or incensement of stirrup ratio at the same time) change the distribution of stress and cracks and decrease the deformation, whereas don’t evidently improve the shearing capacity. The research shows the outstanding flexural and shearing properties of the new type pile.
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    • 参考文献(10)
  • [1] 张忠苗 . 桩基工程 [M]. 北京 : 中国建筑材工业出版 , 2007. (ZHANG Zhong-miao. Pile foundation engineering[M]. Beijing: China Building Material Industry Publishing House, 2007. (in Chinese))
    [2] 张明义 . 静力压入桩的研究与应用 [M]. 北京 : 中国建材工业出版 , 2004. (ZHANG Ming-yi. Research and application of jacked pile[M]. Beijing: China Building Material Industry Publishing House, 2004. (in Chinese))
    [3] 张忠苗 , 张乾青 , 刘俊伟 , 等 . 软土地区预应力管桩偏位处理实例分析 [J]. 岩土工程学报 2010, 32 (6): 975 – 980. (ZHANG Zhong-miao, ZHANG Qian-qing, LIU Jun-wei, et al. Example analysis of sloping Prestressed Pipe Pile with treatment in soft soil[J]. Chinese Journal of Geotechnical Engineering. 2010, 32 (6) : 975 – 980. (in Chinese))
    [4] 闫瑞明 , 闻建军 . 软土地区预应力管桩断桩事故的预防与处理 [J]. 土木工程学报 , 2007, 40 ( 增刊 ): 421 – 424. (YAN Rui-ming, WEN jian-jun. Preventing and reinforcement of PHC pile rupture in soil area[J]. China Civil Engineering Journal, 2007, 40 (S0): 421 – 424 . (in Chinese))
    [5] 陈荣保 , 陆瑞明 . 偏斜预应力管桩的承载力分析与处理 [J]. 岩石力学与工程学报 , 2006, 25 ( 增刊 2): 3545 – 3551. (CHEN Rong-bao, LU Rui-ming. Analysis and treatment of bearing capacity behavior of sloping prestressed pile-pipe[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25 (S2): 3545 – 3551 . (in Chinese))
    [6] 石振明 , 陈建峰 , 祝龙根 . PHC 管桩动力特性试验研究 [J]. 岩土力学 , 2004, 25 (10): 1622 – 1626. (SHI Zhen-ming, CHEN Jian-feng, ZHU Long-gen. Test study on dynamic properties of PHC pile[J]. Rock and Soil Mechanics, 2004, 25 (10): 1622 – 1626. (in Chinese))
    [7] 柳炳康 , 李建宏 , 张星宇 . 预应力填芯管桩抗弯性能与延性特征的试验 [J]. 工业建筑 , 2007, 37 (3): 46 – 50. (LIU Bing-kang, LI Jian-hong, ZHANG Xing-yu. Test of moment bearing capacity and ductility performance of filled prestressed concrete pipe pile[J]. Industrial Construction, 2007, 37 (3): 46 – 50. (in Chinese))
    [8] GB13476 — 2009 先张法预应力混凝土管桩 [S]. 北京 : 中国标准出版社 , 2009. (GB13476 — 2009 Pretensioned spun concrete piles[S]. Beijing: Standards Press of China, 2009. (in Chinese))
    [9] 2002 浙 G2 2 先张法预应力混凝土管桩 [S]. 杭州 : 浙江省建筑设计研究院 , 2002. (2002-Zhe G22 Pretensioned spun concrete piles[S]. Hangzhou: Zhejiang Province Institute of Architectural Design & Research, 2002. (in Chinese))
    [10] GB50152 — 92 混凝土结构试验方法标准 [S]. 北京 : 中国建筑工业出版社 , 1992. (GB50152 — 92 Standard methods for testing of concrete structures[S]. Beijing: China Architecture & Building Press, 1992. (in Chinese))
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出版历程
  • 收稿日期:  2011-08-03
  • 发布日期:  2011-12-06

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