双向增强复合地基桩土应力比计算方法研究

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Abstract Research purposes: Pile-soil stress ratio is an important index to reflect the working characteristics of bidirectional reinforced composite foundation. Due to the complexity of the bearing deformation mechanism of bidirectional reinforced composite foundation under embankment load, this paper takes the embankment and bidirectional composite foundation in the range of double piles as the research object. Considering the combined effects of multiple effects such as embankment soil arching effect, reinforced layer mesh effect and stress diffusion effect, a two-dimensional theoretical analysis model of embankment-horizontal reinforced cushion-vertical pile-soil coordinated deformation is established to explore the influence of various influencing factors on pile-soil stress ratio.Research conclusions: (1) The pile-soil stress ratio decreases with the increase of filling weight and pile spacing.With the increase of the internal friction angle of the filler, it increases first and then decreases. It increases with the increase of embankment filling height, the number of grid layers and the cohesion of filler. (2) The sensitivity of pile-soil stress ratio to each parameter from high to low is: pile spacing, embankment filling height, embankment filling weight, embankment filling cohesion, grid layer number and embankment filling internal friction angle. (3) The research results can provide theoretical basis and engineering reference for the calculation of pile-soil stress ratio of similar projects.

Key words： bidirectional reinforced composite foundation multiple effects geogrid pile-soil stress ratio influencing factors sensitivity analysis

Received: 19 December 2023

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TU473

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	Articles by authors
	ZHANG Sifeng
	SUN Yafeng
	LIU Qian
	FAN Wei
	LONG Guanxu

Cite this article:

ZHANG Sifeng,SUN Yafeng,LIU Qian, et al. Study on Calculation Method of Pile-soil Stress Ratio of Bidirectional Reinforced Composite Foundation[J]. Journal of Railway Engineering Society, 2024, 41(9): 7-8.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2024/V41/I9/7

[1]	魏平, 魏静, 杨松林, 等. 静动荷载下桩网结构路基土拱效应细观分析[J]. 铁道工程学报, 2017(5): 1-5.Wei Ping, Wei Jing, Yang Songlin, etc. Research on the Soil Arching Effect in Pile Net Structure of Embankment under Static Load and Dynamic Load[J]. Journal of Railway Engineering Society, 2017(5): 1-5.
[2]	郄禄文, 任泉, 张佳强, 等. 考虑路堤填筑过程的CFG桩网复合地基受力变形特性敏感性分析[J]. 公路工程, 2022(3): 89-96.Xi Luwen, Ren Quan, Zhang Jiaqiang, etc. Sensitivity Analysis of Stress and Deformation Characteristics of CFG Pile Net Composite Foundation Considering Embankment Filling Process[J]. Highway Engineering, 2022(3): 89-96.
[3]	张玲. 双向增强复合地基承载机理及其设计计算理论研究[D]. 长沙:湖南大学, 2012.Zhang Ling.Working Mechanism of Bidirectional Reinforced Composite Foundation and Its Design Method[D]. Changsha: Hunan University, 2012.
[4]	朱琳,占宏,刘继状. 加筋材料对桩-网复合地基沉降特性的影响[J]. 浙江工业大学学报,2021(6):656-663.Zhu Lin,Zhan Hong,Liu Jizhuang.Influence of Reinforced Materials on Settlement Characteristics of Pile-net Composite Foundation[J].Journal of Zhejiang University of Technology,2021(6):656-663.
[5]	赵明华, 刘敦平, 张玲. 双向增强体复合地基桩土应力比计算[J]. 工程力学, 2009(2): 176-181.Zhao Minghua, Liu Dunping, Zhang Ling.Calculation for Pile-soil Stress Ratio of Two-direction Reinforced Composite Foundation[J]. Engineering Mechanics, 2009(2): 176-181.
[6]	黄宇华, 徐林荣, 周俊杰, 等. 基于改进Terzarghi方法的桩网地基桩土应力计算[J]. 岩土力学, 2020(2): 667-675.Huang Yuhua, Xu Linrong, Zhou Junjie, etc. Calculation of Pile-soil Stress in Pile-net Composite Foundation Based on Improved Terzarghi Method[J]. Rock and Soil Mechanics, 2020(2): 667-675.
[7]	张玲, 邓云, 欧强,等. 考虑土拱效应的双向增强复合地基沉降计算[J]. 公路工程, 2020(5): 73-78.Zhang Ling, Deng Yun, Ou Qiang, etc. Settlement Calculation of Bidirectional Reinforced Composite Foundation with Consideration of Soil Arching[J]. Highway Engineering, 2020(5): 73-78.
[8]	杨宇. 双向增强体复合地基承载性能研究[D]. 长沙: 湖南大学, 2006.Yang Yu.Research on Bearing Capability of Double Direction Reinforced Composite Foundation[D]. Changsha: Hunan University, 2006.
[9]	赵明华, 刘猛, 龙军, 等. 路堤荷载下双向增强体复合地基桩土应力比计算[J]. 岩石力学与工程学报, 2012(S1): 3286-3290.Zhao Minghua, Liu Meng, Long Jun, etc. Calculation of Pile-soil Stress Ratio of Two-direction Reinforcement Composite Foundation under Embankment Loads[J]. Chinese Journal of Rock Mechanics and Engineering, 2012(S1): 3286-3290.
[10]	郑俊杰, 卢嘉泰, 刘洋,等. 考虑空间变异性的加筋路堤力学响应敏感性分析[J]. 华中科技大学学报:自然科学版, 2023(8): 1-7.Zheng Junjie, Lu Jiatai, Liu Yang, etc. Sensitivity Analysis of Foundation Soil's Mechanical Parameters to Mechanical Response of Geogrid Reinforced Embankment Considering Spatial Variability[J]. Journal of Huazhong University of Science and Technology:Natural Science Edition, 2023(8): 1-7.