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| Field study on soil arching evolution of high embankments on soft ground reinforced with PHC piles |
| LI Jun1，LI Guowei2，3，XIONG Li2，HOU Yuzhou2，WU Jiantao3 |
(1. Kaiyang Expansion Management Office，Guangdong Freeway Co.，Ltd.，Guangzhou，Guangdong 529339，China；
2. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering，Hohai University，Nanjing，
Jiangsu 210098，China；3. Highway and Railway Research Institute，Hohai University，Nanjing，Jiangsu 210098，China) |
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Abstract It is relatively feasible to use PHC pipe pile composite foundation for constructing high embankments of more than 30 m in mountain basins and ravines with soft soil layers. The development and evolution characteristics of the soil arch of high embankments on soft ground strengthened with PHC pipe piles are studied through field tests. The results show that：(1) The distribution of the base pressure of the embankment affects the bearing mode of the foundation reinforced by PHC pipe piles. The uneven distribution of the base pressure will produce relatively large earth pressure between piles，which will lead to that the load of some parts is greater than the bearing capacity of the natural foundation. The pipe pile group can increase the bearing capacity of the soil layer between piles. (2) The compaction of the soil at the pile tip causes the stress relaxation of the pile top and increases the pressure on the soil between piles. Under high load，the phenomenon of pile tip penetration will occur，and the settling rate of the piles is higher than that of the soil between the piles. (3) The development and evolution characteristics of the soil arching in pipe pile composite foundation embankment are determined by load level and bearing stratum conditions. The penetration of the pile tip will lead to the temporary disappearance of the soil arch，which results in the local shear failure of soil between piles，aggravates the overall shear deformation of the foundation，makes the pile incline to form unstable soil arch and causes engineering safety hazards or accidents.
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[1] 王明慧，张 桥. 山区高速铁路工程高路堤与高架桥的选择分析[J]. 路基工程，2012，(4)：55–57.(WANG Minghui，ZHANG Qiao. Analysis on selection of high embankment and viaduct for high speed railway project in mountainous area[J]. Subgrade engineering，2012，(4)：55–57.(in Chinese))
[2] WU J T，YE X，LI J，et al. Field and numerical studies on the performance of high embankment built on soft soil reinforced with PHC piles[J]. Computers and Geotechnics，2019，107：1–13.
[3] 徐 超，汪益敏. 桩承式加筋路堤研究综述[J]. 长江科学院院报，2014，31(3)：19–26.(XU Chao，WANG Yimin. Summary of research on pile supported reinforced embankment[J]. Journal of Yangtze River Scientific Research Institute，2014，31(3)：19–26.(in Chinese))
[4] 郑 刚，龚晓南，谢永利，等. 地基处理技术发展综述[J]. 土木工程学报，2012，45(2)：127–146.(ZHEN Gang，GONG Xiaonan，XIE Yongli，et al. State-of-the-art techniques for ground improvement in China[J]. China Civil Engineering Journal，2012，45(2)：127–146.(in Chinese))
[5] 刘汉龙，赵明华. 地基处理研究进展[J]. 土木工程学报，2016，49(1)：96–115.(LIU Hanlong，ZHAO Minghua. Review of ground improvement technical and its application in China[J]. China Civil Engineering Journal，2016，49(1)：96–115.(in Chinese))
[6] HAN J. Recent research and development of ground column technologies[J]. Proceedings of the Institution of Civil Engineers-Ground Improvement，2015，168：246–264.
[7] ARIYARATHNE P，LIYANAPATHIRANA D. Review of existing design methods for geosynthetic-reinforced pile-supported embankments[J]. Soils and Foundations，2015，55(1)：17–34.
[8] KOU HL，CHU J，GUO W，et al. Field study of residual forces developed in pre-stressed high-strength concrete(PHC) pipe piles[J]. Canadian Geotechnical Journal，2015，53(4)：696–707.
[9] 邢皓枫，赵红崴，叶观宝，等. PHC 管桩工程特性分析[J]. 岩土工程学报，2009，31(1)：36–39.(XING Haofeng，ZHAO Hongwei，YE Guanbao，et al. Analysis of engineering characteristics of PHC pipe piles[J]. Chinese Journal of Geotechnical Engineering，2009，31(1)：36–39.(in Chinese))
[10] XING H F，ZHAO H W，YE G B，et al. Effect of driving long pre-stressed high-strength concrete pipe piles in alluvium and its mechanical behavior[J]. Bulletin of Engineering Geology and the Environment，2012，71(4)：771–781.
[11] 律文田，王永和，冷伍明. PHC 管桩荷载传递的试验研究和数值分析[J]. 岩土力学，2006，27(3)：466–470.(LÜ Wentian，WANG Yonghe，LENG Wuming. Testing and numerical analysis of load transfer mechanism of PHC pile[J]. Rock and Soil Mechanics，2006，27(3)：466–470.(in Chinese))
[12] LI G W，AMENUVOR A C，HOU Y Z，et al. Effect of open-ended PHC pile installation during embankment widening on the surrounding soil[J]. Journal of Geotechnical and Geoenvironmental Engineering，2018，145(2)：05018006.
[13] LOW B K，TANG S K，CHOA V. Arching in piled embankments[J]. Journal of Geotechnical Engineering，1994，120(11)：1 917–1 938.
[14] CHEN Y M，JIA N，CHEN R P. Soil arch analysis of pile-supported embankments[J]. China Journal of Highway and Transport，2004，(4)：2–6.
[15] 费 康，王军军，陈 毅. 桩承式路堤土拱效应的试验和数值研究[J]. 岩土力学，2011，32(7)：1 975–1 983.(FEI Kang，WANG Junjun，CHEN Yi. Experimental and numerical studie-s of soil arching in piled embankment[J]. Rock and Soil Mechanics，2011，32(7)： 1 975–1 983.(in Chinese))
[16] 曹卫平，陈仁朋，陈云敏. 桩承式加筋路堤土拱效应试验研究[J]. 岩土工程学报，2007，29(3)：436–441.(CAO Weiping，CHEN Renpeng，CHEN Yunmin. Experimental investigation on soil arching in piled reinforced embankments[J]. Chinese Journal of Geotechnical Engineering，2007，29(3)：436–441.(in Chinese))
[17] 吴建涛，叶 霄，李国维，等. 高路堤下PHC桩加固软土地基的承载及变形特性[J]. 岩土力学，2018，39(增2)：351–358.(WU Jiantao，YE Xiao，LI Guowei，et al. Bearing and deformation behaviors of PHC pile-reinforced soft foundation under high embankment[J]. Rock and Soil Mechanics，2018，39(Supp.2)：351–358.(in Chinese))
[18] 赵明华，胡 增，张 玲，等. 考虑土拱效应的高路堤桩土复合地基受力分析[J]. 中南大学学报：自然科学版，2013，44(5)：2 047–2 052.(ZHAO Minghua，HU Zeng，ZHANG Ling，et al. Stress analysis of pile-soil composite ground considering soil arching effect of high embankment[J]. Journal of Central South University：Science and Technology，2013，44(5)：2 047–2 052.(in Chinese))
[19] HEWLETT W J，RANDOLPH M F. Analysis of piled embankments[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1988，21(3)：12–18.
[20] 曹卫平，凌道盛，陈云敏. 刚性桩加固高速公路软基土拱效应现场试验研究及其与解析解的比较[J]. 岩土工程学报，2007，29(10)：1 577–1 581.(CAO Weiping，LING Daosheng，CHEN Yunmin. Field tests on soil arching of highway embankments reinforced with rigid piles and their comparison with current analytical methods[J]. Chinese Journal of Geotechnical engineering，2007，29(10)：1 577–1 581.(in Chinese))
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DONG Xuechao1, 2, LU Zheng1, 2, ZHENG Qinggang3, JIANG Fan4, LI Jiahang1, 2, GUO Mingwei1, 2*. Numerical simulation method and application for the entire dynamic sinking process of a deep-water super-large caisson foundation[J]. , 2026, 45(6): 1899-1912. |
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2022, Vol. 41 
