吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (4): 1075-1081.doi: 10.13229/j.cnki.jdxbgxb201704010

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Negative skin friction of pile foundation considering soil consolidation in high fill site

ZHENG Yi-feng1, MAO Jian1, LIANG Shi-zhong2, ZHENG Chuan-feng1   

  1. 1.College of Construction Engineering, Jilin University, Changchun 130026, China;
    2.Jilin Provincial Communication Planning and Design Institute, Changchun 130021, China
  • Received:2016-06-12 Online:2017-07-20 Published:2017-07-20

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Abstract: Research about the location of neutral point of negative friction in pile foundation when silty clay is backfilled is carried out at T2 terminal of Longjia Airport, Changchun. Soil settlement observation, bearing capacity test of pile foundation and numerical simulation are adopted in the research. By observation and experiment, the accumulative settlement of backfill, the relation curve and fitting formula between the soil filling load and time and the Q-S curve of a single pile, the effects of soil depth on the internal force of pile body and on the pile side negative skin friction are obtained. Finite element software, Midas, is applied to compute the settlement deformation of the pile foundation. The actually measured pile side friction is used to simulate the interaction between the pile and surrounding soil. In the experiments, the pile bottom layer soil is simulated by elastic support, and the stiffness of the spring is calculated by “m” method. The residual settlement around the pile under different consolidation time is calculated by modified Takagi Shunsuke method. The negative skin friction neutral points under different consolidation times are located by comparative analysis of the results of theoretical calculation and field experiment. Then, the settlement correction coefficient of the foundation soil in this kind of field is modified.

Key words: civil engineering construction, pile foundation, consolidation settlement, neutral point

CLC Number: 

  • TU473.1
[1] 袁灯平,黄宏伟,程泽坤. 软土地基桩侧负摩阻力研究进展初探[J]. 土木工程学报,2006,39 (2):53-60.
Yuan Deng-ping, Huang Hong-wei, Cheng Ze-kun. Research progress of negative skinfriction on piles in soft soil[J].China Civil Engineering Journal, 2006, 39(2):53-60.
[2] 中国建筑科学研究院. 建筑桩基技术规范JGJ94-2008[M]. 北京:中国建筑工业出版社,2008.
[3] 陈福江,马建林,朱林,等. 考虑压缩模量深度效应的深厚软土桩基沉降计算[J]. 岩土力学,2012,33(增刊2):167-172.
Chen Fu-jiang,Ma Jian-Lin,Zhu Lin,et al. Settlement alcuation of pile foundation in deep-soft soil sidering depth effect of compression modulus[J]. Rock and Solil Mechanics,2012,33(Sup.2):167-172.
[4] 王伟,杨敏,王红雨. 竖向荷载下桩基础的通用分析方法[J]. 土木工程学报,2006,39(5):96-101.
Wang Wei, Yang Min, Wang Hong-yu. Analysis methodof rigid piled raft foundation under vertical loading[J]. China Civil Engineering Journal, 2006,39(5):96-101.
[5] 赖琼华. 桩的P-S曲线计算方法[J]. 岩石力学与工程学报,2003,22(3):509-513.
Lai Qiong-hua. Practical calculation procedure of pile-foundation settlement[J]. Chinese Journal of Rock Mechanics and Engineering,2003,22(3): 509-513.
[6] 曹汉志. 桩的轴向荷载传递及荷载-传递沉降曲线的数值计算方法[J]. 岩土工程学报,1986,8(6):37-45.
Cao Han-zhi. Axial loading transfer of pile and numberical calculation method of loading-settlement curve[J]. Chinese Journal of Geotechnical Engineering,1986,8(6):37-45.
[7] Endo M. Negative skin friction acting on steel pipe pile in clay[C]//Proceedings of 8th International Conference on Soil Mechanics and Foundation Engineering, Mexico City, 1969:85-92.
[8] Okabe T. Large negative friction and friction-free pile methods[C]//Proceedings of 9th international Conference on Soil Mechanics and Foundation Engineering, Mexico City,1977:679-682.
[9] 马时冬. 桩身负摩阻力的现场测试与研究[J]. 岩土力学,1997,18(1):8-15.
Ma Shi-dong. Study on the field measurement of negative friction of piles[J]. Rock and Soil Mechnanics, 1997, 18(1): 8-15.
[10] 王建华,陆建飞,沈为平. Biot固结理论在单桩负摩擦研究中的应用[J]. 岩土工程学报,2000,22(5):590-593.
Wang Jian-hua, Lu Jian-fei, Shen Wei-ping. The application of Biot consolidation theory to the negative friction problem of single pile[J]. Chinese Journal of Geotechnical Engineering, 2000, 22(5):590-593.
[11] 夏力农,杨秀竹. 桩顶荷载影响负摩阻力的现场试验与数值模拟[J]. 铁道科学与工程学报,2008,25(5):46-49.
Xia Li-nong,Yang Xiu-zhu. Field test and numerical simulation of working load influences on negative skin friction behaviors of piles[J].Journal of Railway Science and Engineering,2008,25(5):46-49.
[12] 胡昕,张希宏,刘厚健. 桩基中性点深度估算方法对比分析[J]. 岩土工程学报,2011,33(增刊2):184-187.
Hu Xin, Zhang Xi-hong, Liu Hou-jian. Comparison and analysis of estimation methods for depth of neutral point of pile foundation[J]. Chinese Journal of Geotechnical Engineering,2011,33(Sup.2):184-187.
[13] 苟尧泊,俞峰,杨予. 基坑开挖引起既有桩基侧摩阻力中性点位置分析[J]. 岩土力学,2015,36(9):2681-2687.
Gou Yao-bo, Yu Feng, Yang Yu. Locating neutral point of excavation-induced skin friction on existing piles[J]. Rock and Solil Mechanics,2015,36(9):2681-2687.
[14] 孙昊月,王清,林坚民,等. 双曲线法和指数曲线法推算软土地基沉降量的准确性比较[J]. 煤炭技术,2010,29(1):167-170.
Sun Hao-yue,Wang Qing,Lin Jian-min, et al. Accuracy comparison bewteen hyperbola method and exponential curve to validate soft foundation settlement[J]. Coal Technology,2010,29(1):167-170.
[15] GB50007-2011.中华人民共和国建设部. 建筑地基基础设计规范[S].
[16] 杨大明.堆载预压下软土地基固结研究[J].探矿工程,2014(7):73-75.
Yang Da-ming. Stack preloading consolidation of soft soil foundation under study[J]. Exploration Engineering,2014(7):73-75.
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