预应力管桩地基高路堤中土拱演化特征现场试验

doi:10.13722/j.cnki.jrme.2021.0034

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (2637 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要在含有软土层分布的山间盆地、沟谷等场地上填筑30 m以上的高路堤，采用预应力高强混凝土(PHC)管桩复合地基具有相对较好的可操作性，通过现场试验研究PHC管桩加固软基上高路堤中土拱的发育演化特征。试验表明：(1) 基底压力分布状态影响管桩加固地基的承载方式，非均匀分布基底压力会产生相对较大的桩间土压力，存在大于天然地基承载力的部位；管桩群具有增强桩间土地层承载力的作用。(2) 桩端土体压密引起桩承荷载松弛，使桩间土压力增长；高荷载下会出现桩端刺入现象，导致桩体沉降速率大于桩间土。(3) 荷载水平和持力层条件决定管桩复合地基路堤中土拱发育演化特征，桩端刺入会导致土拱暂时消失，由此衍生桩间土局部剪切破坏，加剧地基整体剪切变形，使桩体倾斜形成非稳定土拱，构成工程安全隐患或导致工程事故。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	李军1
	李国维2
	3
	熊力2
	侯宇宙2
	吴建涛3

关键词 ：基础工程, PHC管桩, 软土地基, 高路堤, 土拱演化, 现场试验

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.

Key words： foundation engineering')" href="#">

foundation engineering PHC pile soft soil foundation high embankment evolution of the soil arch field test

引用本文:

李军1，李国维2，3，熊力2，侯宇宙2，吴建涛3. 预应力管桩地基高路堤中土拱演化特征现场试验[J]. 岩石力学与工程学报, 2022, 41(1): 186-194.
LI Jun1，LI Guowei2，3，XIONG Li2，HOU Yuzhou2，WU Jiantao3. Field study on soil arching evolution of high embankments on soft ground reinforced with PHC piles. , 2022, 41(1): 186-194.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2021.0034 或 http://rockmech.whrsm.ac.cn/CN/Y2022/V41/I1/186

[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))
[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.
[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))
[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.
[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.
[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))
[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))
[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))
[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))
[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))
[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.
[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.
[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))
[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))
[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.
[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.
[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.
[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.
[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))
[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))