静压管桩桩-土作用机制及其竖向承载力确定方法

doi:10.13278/j.cnki.jjuese.201603202

摘要/Abstract

摘要：

为深入研究静压管桩桩土的作用机制及其竖向承载力的确定方法，以长春地区建筑工程使用的静压管桩为例，采用数值模拟方法和桩的载荷试验，分析了桩对桩周土的挤压作用以及桩端阻力变化规律。结果表明：桩被压入土体过程中，主要受到桩侧摩阻力和桩端阻力的作用，并造成桩周及桩端附近土体受到挤压而变形；随着桩入土深度的增加，桩顶荷载逐渐增大，而且桩径越大，相应深度的桩顶荷载就越大；同时，随着桩入土深度的增加，桩端阻力在单桩竖向承载力中的比例有规律地下降。根据桩端阻力在单桩承载力中所占比例与入土深度的关系，提出了静压管桩单桩承载力特征值的计算方法；对比建议公式和经验公式计算结果，其比值为0.57~1.26，两者结果接近。因此，文中所提出的单桩承载力特征值的确定方法是可行的。

关键词: 静压管桩, 数值模拟, 单桩承载力特征值

Abstract:

In order to research further on the pile-soil interaction mechanism and the methods to determine the vertical bearing capacity of prestressed concrete pipe pile, taken three projects of the prestressed concrete pipe pile in Changchun area as examples, the squeezing effect of pile to soil and the resistance of pile tip resistance are simulated numerically and tested by loading tests. It is shown that the side friction and the tip resistance are together produced to support the top load of pile in process of pile pressed into subsoil, and thus cause compressional deformation in the subsoil around the pile and near the end of pile. With increasing in depth, the top load of pile will increase gradually, and the bigger diameter of pile is the larger top load is. The proportion of tip resistance to pile bearing capacity tends to decline in regular with increasing depth of pile. According to the relationship between the proportion of pile tip resistance to single pile bearing capacity and the depth of pile, a new method to determine the bearing capacity of single pile is suggested in this paper. The method is feasible and applicable in Changchun area as the ratio of its calculation values to the results from empirical formula is between 0.57 and 1.26.

Key words: pressured pile concrete pipe, numerical simulation, characteristic value of single pile bearing capacity

中图分类号:

P642.22

王常明, 常高奇, 吴谦, 李文涛. 静压管桩桩-土作用机制及其竖向承载力确定方法[J]. 吉林大学学报(地球科学版), 2016, 46(3): 805-813.

Wang Changming, Chang Gaoqi, Wu Qian, Li Wentao. Pile-Soil Interaction Mechanism and a Method to Determine Vertical Bearing Capacity of Prestressed Concrete Pipe Pile[J]. Journal of Jilin University(Earth Science Edition), 2016, 46(3): 805-813.

参考文献

[1] 王启铜,龚晓南,曾国熙. 考虑土体拉、压模量不同时静压桩的沉桩过程[J]. 浙江大学学报(自然科学版),1992,26(6):678-687. Wang Qitong, Gong Xiaonan, Zeng Guoxi. Pile Jacking in a Soil Mass with Different Elstic Moduli in Tension and Compressinon[J]. Journal of Zhejiang University (Natural Sciences),1992,26(6):678-687.

[2] 施建勇,陈文,彭劼. 沉桩挤土效应分析[J]. 河海大学学报(自然科学版),2003,31(4):415-418. Shi Jianyong, Chen Wen, Peng Jie. Pile-Sinking Induced Soil Squeezing Effect[J]. Journal of Hohai University (Natural Sciences),2003,31(4):415-418.

[3] 张宇.长春地区静压桩承载性状及应用研究[D].长春:吉林大学,2009. Zhang Yu. Study on Bearing Behavior of Jacked Pile and Its Application in Changchun[D]. Changchun:Jilin University.2009.

[4] Orrje O,Broms B. Effects of Pile Driving on Soil Pro-perties[J]. Journal of Soil Mechanics & Foundations Division ASCE,1967,93(SM5):59-73.

[5] Hagerty D J, Peck P B. Heave and Lateral Movements due to Pile Driving[J]. Journal of Soil Mechanics & Foundations Division, ASCE, 1971,97(SM11):1513-1532.

[6] 田雪飞,卢海筠,闫景侠,等. 后压浆灌注桩基承载力计算方法比较研究[J]. 岩土工程学报,2013,35(增刊1):372-377. Tian Xuefei, Lu Haiyun,Yan Jingxia, et al. Comparative Study on Methods for Bearing Capacity of Foundation with Post-Grouting Drilling Piles[J]. Chinese Journal of Geotechnical Engineering, 2013,35(Sup.1):372-377.

[7] 李雨浓,李镜培,赵仲芳,等. 层状地基静压桩贯入过程机理试验[J]. 吉林大学学报(地球科学版),2010,40(6):1409-1414. Li Yunong, Li Jingpei, Zhao Zhongfang, et al. Model Test Research on Penetration Process of Jacked Pile in Layered Soil[J]. Journal of Jilin University (Earth Science Edition), 2010,40(6):1409-1414.

[8] 张明义.静力入桩的研究与应用[M].北京:中国建筑工业出版社,2004. Zhang Mingyi, Researching and Application of the Static Pile[M]. Beijing:China Building Industry Press, 2004.

[9] 冯国军. 摩擦桩竖向承载力计算方法研究[J]. 铁道工程学报,2007,24(2):65-68,99. Feng Guojun. Research of Upright Bearing Capacity of Friction Pile[J]. Journal of Railway Engineering, 2007,24(2):65-68,99.

[10] 姜晨光,Bai Xiaolin,巩亮生,等. 摩擦桩单桩竖向承载力计算方法[J]. 辽宁工程技术大学学报(自然科学版),2008,27(增刊1):71-73. Jiang Chenguang, Bai Xiaolin,Gong Liangsheng, et al. Calculation of Vertical Method Load-Bearing Capacity of Single Pilein Frictionpile[J]. Journal of Liaoning Technical University (Natural Sciences), 2008, 27(Sup.1):71-73.

[11] JGJ94-2008建筑桩基技术规范[S]. 北京:中国建筑工业出版社,2008. JGJ94-2008 Technical Specification for Constructionof Pile Foundation[S].Beijing:China Building Industry Press, 2008.

[12] GB50007-2011建筑地基基础设计规范[S].北京:中国建筑工业出版社,2011. GB50007-2011 Code for Design of Building Foundation[S]. Beijing:China Building Industry Press, 2011.

[13] DBJ-15-31-2003建筑地基基础设计规范[S].北京:中国建筑工业出版社,2003. GB50007-2011 Code for Design of Building Foundation[S]. Beijing:China Building Industry Press, 2003.

[14] 高盟,王滢,高广运,等.一种大直径扩底桩端阻力和侧阻力的确定方法[J].岩土力学,2013,34(3):797-801. Gao Meng, Wang Ying, Gao Guangyun, et al. A Method for Determining Tip and Side Resistances of Large Diameter Pedestal Pile[J]. Rock and Soil Mechanics, 2013,34(3):797-801.

[15] DB22T432-2006静压预应力混凝土管桩基础技术规程[S]北京:中国建筑工业出版社,2006. DB22T432-2006 Technical Specificition for Stric Pressing-in Prestressed Concrete Pipe Pile Foundation[S]. Beijing:China Building Industry Press, 2006.

[16] 张明义, 邓安福,干腾君.静力压桩数值模拟的位移贯入法[J].岩土力学,2003,(1):113-117. Zhang Mingyi, Deng Anfu, Gan Tengjun. Displacement Penetration Method Used for Numerical Simnulation to Jacked Pile[J]. Rock and Soil Mechanics 2003,24(1):113-117.

[17] 陈育民,徐鼎平. FLAC FLAC3D基础与工程实例[M].二版.北京:中国水利水电出版社,2009. Chen Yumin, Xu Dingping. The FLAC V FLAC3D Foundation and Engineering Examples[M]. 2nd ed. Beijing China Water Power Press,2009.

[18] 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. JGJ 106-2003 Technical Code for Testing of Building Foundation Piles[S]. Beijing:China Building Industry Press, 2003.

相关文章 15

[1]	夏英杰, 陈华斌, 陈健, 姚明宇, 杨海. 不同施工参数下深层页岩水力压裂数值模拟[J]. 吉林大学学报(地球科学版), 2026, 56(3): 924-936.
[2]	涂君汕, 陈辉, 邓居智, 陈康, 李焱, 余辉. 水库堤坝对高密度电法的影响及校正技术[J]. 吉林大学学报(地球科学版), 2026, 56(3): 1013-1025.
[3]	束龙仓, 位书静, 澈丽木格, 温中琦, 刘波. 西辽河平原生态输水的地下水响应及不确定性量化[J]. 吉林大学学报(地球科学版), 2026, 56(2): 647-660.
[4]	黄兴国, 翁央央, 韩丽. 基于广义递归卷积的孔隙黏弹地震波正演模拟[J]. 吉林大学学报(地球科学版), 2026, 56(1): 377-385.
[5]	周柳湘, 余思琴, 陈俊华, 刘城, 陈义, 张鑫鑫, . 潜孔锤与冲击钻机联合钻进工艺成孔碎岩过程数值模拟[J]. 吉林大学学报(地球科学版), 2025, 55(5): 1608-1618.
[6]	苑成旺, 张敏, 张少龙, 秦磊, 郭海洋, 墨海滢, 信旸. 长春地铁基坑支护结构变形与地表沉降特征[J]. 吉林大学学报(地球科学版), 2025, 55(3): 879-892.
[7]	于子望, 卢帅屹, 白林, 郑天琪. CO2地质封存岩石力学问题研究进展[J]. 吉林大学学报(地球科学版), 2025, 55(3): 930-942.
[8]	程瑶, 陆丹丹, 赵龙飞. 微波加热油页岩储层的热响应 [J]. 吉林大学学报(地球科学版), 2025, 55(2): 387-400.
[9]	刁国君, 何昕. 地铁明挖车站下穿越既有建筑物的局部暗扩挖施工关键技术 [J]. 吉林大学学报(地球科学版), 2025, 55(2): 536-549.
[10]	蔺学旻, 肖红琳. 缝洞型储层声波远探测测井响应模拟及应用——以塔河油田碳酸盐岩缝洞型储层为例[J]. 吉林大学学报(地球科学版), 2025, 55(1): 312-327.
[11]	魏虹羽, 李世超, 王伟安. 地球动力学数值模拟算法的应用现状与展望[J]. 吉林大学学报(地球科学版), 2025, 55(1): 98-124.
[12]	吴泽坤, 何来胜, 白晓宇, 麻栋栋, 牛永昌, 赵广, 桑松魁, 闫楠, 张明义. 层状土中静压桩连续贯入现场试验与数值模拟[J]. 吉林大学学报(地球科学版), 2024, 54(4): 1291-1304.
[13]	庞志超, 肖华, 毛晨飞, 陈国军, 梁琬坤, 高明, 张啸. 准噶尔盆地南缘地区含膏质地层岩性特征及测井识别方法[J]. 吉林大学学报(地球科学版), 2024, 54(4): 1419-1431.
[14]	刘怀湜, 赵雪娇, 刘雨新, 房庭瑞, 张静, 嵇艳鞠. 基于改进粒子群优化的超顺磁效应多参数提取[J]. 吉林大学学报(地球科学版), 2024, 54(3): 993-1002.
[15]	韩长玉, 赵浩汀. 路基填筑短期内热棒高导热性影响 [J]. 吉林大学学报(地球科学版), 2024, 54(2): 570-580.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed