Improved method for calculating settlement of pile foundations and case studies

WANG Tao; ZHAO Zhipeng; CHU Zhuo; WANG Xu

doi:10.11779/CJGE20221011

Volume 45 Issue 11

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Chinese Journal of Geotechnical Engineering > 2023 > 45(11): 2227-2237. > DOI: 10.11779/CJGE20221011

WANG Tao, ZHAO Zhipeng, CHU Zhuo, WANG Xu. Improved method for calculating settlement of pile foundations and case studies[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(11): 2227-2237. DOI: 10.11779/CJGE20221011

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Improved method for calculating settlement of pile foundations and case studies

WANG Tao^{1, 2, 3, 4,},
ZHAO Zhipeng^{1, 2, 3, 4},
CHU Zhuo^{1, 2, 3, 4},
WANG Xu⁵

1.
State Key Laboratory of Building Safety and Built Environment, Beijing 100013, China
2.
China Academy of Building Research Foundation Institute, Beijing 100013, China
3.
Beijing Engineering Technology Research Center of Foundation and City Underground Space Development and Utilization, Beijing 100013, China
4.
National Engineering Research Center of Building Technology, Beijing 100013, China
5.
China Construction First Group Construction & Development Co., Ltd., Beijing 100102, China

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Received Date: August 18, 2022
Available Online: March 09, 2023

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Abstract

Abstract

Based on the test results of 153 field test piles, various complicated and different shaft resistance distributions under working loads (characteristic values of bearing capacity of piles) are generalized into four types: regular trapezoid, cone head, garlic head and concave valley, and the additional stress coefficient within the projection range of pile section is homogenized. At the same time, the additional stress coefficient of the affected piles in the range of section projection is homogenized. Based on this, the concrete steps and detailed rules for calculating the settlement of conventional and composite pile foundations by the method of layered summation for the homogenized additional stress of pile foundations are put forward. Through 6 groups of model tests and 8 practical engineering cases, it is shown that the settlement value of pile foundations calculated by the proposed method is close to the measured one without correction.

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References (10)

References

[1]	邱明兵, 刘金砺, 秋仁东, 等. 基于Mindlin解的单桩竖向附加应力系数[J]. 土木工程学报, 2014, 47(3): 130-137. https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC201403018.htm QIU Mingbing, LIU Jinli, QIU Rendong, et al. Study on vertical additional stress coefficient for the single piles based on Mindlin's stress solution theory[J]. China Civil Engineering Journal, 2014, 47(3): 130-137. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC201403018.htm
[2]	刘金砺, 秋仁东, 邱明兵, 等. 不同条件下桩侧阻力端阻力性状及侧阻力分布概化与应用[J]. 岩土工程学报, 2014, 36(11): 1953-1970. doi: 10.11779/CJGE201411001 LIU Jinli, QIU Rendong, QIU Mingbing, et al. Behaviors of shaft resistance and tip resistance of piles under different conditions and conceptualization and application of distribution of shaft resistance[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(11): 1953-1970. (in Chinese) doi: 10.11779/CJGE201411001
[3]	刘金砺, 邱明兵, 秋仁东, 等. Mindlin解均化应力分层总和法计算群桩基础沉降[J]. 土木工程学报, 2014, 47(5): 118-127. https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC201405018.htm LIU Jinli, QIU Mingbing, QIU Rendong, et al. A layerwise summation method for settlement calculation of pile group based on the homogenized Mindlin stress[J]. China Civil Engineering Journal, 2014, 47(5): 118-127. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC201405018.htm
[4]	建筑桩基技术规范: JGJ 94—2008[S]. 北京: 中国建筑工业出版社, 2008. Technical Code for Building Pile Foundations: JGJ 94—2008[S]. Beijing: China Architecture & Building Press, 2008. (in Chinese)
[5]	刘金砺, 迟铃泉. 桩土变形计算模型和变刚度调平设计[J]. 岩土工程学报, 2000, 22(2): 151-157. http://www.cgejournal.com/cn/article/id/10469 LIU Jinli, CHI Lingquan. The modified model of pile-soil deformation calculation and variable rigidity design method for balance settlement[J]. Chinese Journal of Geotechnical Engineering, 2000, 22(2): 151-157. (in Chinese) http://www.cgejournal.com/cn/article/id/10469
[6]	王涛, 刘金砺, 王旭. 基于桩侧阻概化模式的基桩均化附加应力系数研究[J]. 岩土工程学报, 2018, 40(4): 665-672. doi: 10.11779/CJGE201804010 WANG Tao, LIU Jinli, WANG Xu. Homogenized additional stress coefficient of foundation piles based on generalized mode of pile shaft resistance[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(4): 665-672. (in Chinese) doi: 10.11779/CJGE201804010
[7]	王涛, 褚卓, 刘金砺, 等. 基于桩侧摩阻力概化模式的桩身压缩量计算[J]. 建筑结构, 2019, 49(17): 130-135, 83. https://www.cnki.com.cn/Article/CJFDTOTAL-JCJG201917020.htm WANG Tao, CHU Zhuo, LIU Jinli, et al. Calculation of pile body compression based on pile shaft resistance conceptualization mode[J]. Building Structure, 2019, 49(17): 130-135, 83. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-JCJG201917020.htm
[8]	MINDLIN R D. Force at a point in the interior of a semi-infinite solid[J]. Physics, 1936, 7(5): 195-202.
[9]	GEDDES J D. Stresses in foundation soils due to vertical subsurface loading[J]. Géotechnique, 1966, 16(3): 231-255.
[10]	DGJ 08-11—2010地基基础设计规范[S]. 上海: 上海现代建筑设计(集团)有限公司, 2010. DGJ 08-11—2010 Foundation Design Code[S]. Shanghai: Shanghai Xian Dai Architectural Design (Group) Co Ltd, 2010. (in Chinese)