Model tests on dynamic response of ballastless track X-shaped pile-raft foundation under long-term train loads

SUN Guang-chao; LI Jian-lin; KONG Gang-qiang; LUO Ya; WANG Le-hua; DENG Hua-feng

doi:10.11779/CJGE202205020

Volume 44 Issue 5

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Chinese Journal of Geotechnical Engineering > 2022 > 44(5): 961-969. > DOI: 10.11779/CJGE202205020

SUN Guang-chao, LI Jian-lin, KONG Gang-qiang, LUO Ya, WANG Le-hua, DENG Hua-feng. Model tests on dynamic response of ballastless track X-shaped pile-raft foundation under long-term train loads[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(5): 961-969. DOI: 10.11779/CJGE202205020

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Model tests on dynamic response of ballastless track X-shaped pile-raft foundation under long-term train loads

1.
Key Laboratory of Geological Hazards in Three Gorges Reservoir Area, China Three Gorges University, Yichang 443002, China
2.
Bureau of Public Works of Longgang District, Shenzhen 518100, China
3.
Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China

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Received Date: June 15, 2021
Available Online: September 22, 2022

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Abstract

Abstract

Based on a series of 1︰5 scale model tests on ballastless track X-shaped pile-raft foundation, the dynamic response of the foundation in saturated sand is studied under long-term train cyclic loading. The dynamic stress of the X-shaped pile, the skin friction of the pile and the cumulative settlement of the foundation with the number of loading cycles are analyzed. It is found that the axial force and cumulative settlement of the pile increase with the increasing loading cycles, but the rate of increment decreases. The axial force of the pile body is time-dependent. In addition, the lower the loading frequency, the lower the number of loading cycles required for the axial force of the pile to be stabilized. The area of negative friction is within 1 m from the top of the pile, and the area of positive friction is below 1 m from the surface. The neutral point is at 1/4 of the pile length. The variation rules of normalized axial force, side friction and settlement of the pile with the number of normalized loading cycles can be described by a logarithmic function.
- train load,
- ballastless track,
- pile-raft foundation,
- dynamic stress of pile,
- pile skin friction,
- accumulated settlement

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References (28)

References

[1]	刘汉龙, 孙广超, 孔纲强, 等. 无砟轨道X形桩–筏复合地基动土压力分布规律试验研究[J]. 岩土工程学报, 2016, 38(11): 1933–1940. doi: 10.11779/CJGE201611001 LIU Han-long, SUN Guang-chao, KONG Gang-qiang, et al. Model tests on distribution law of dynamical soil pressure of ballastless track XCC pile-raft composite foundation[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(11): 1933–1940. (in Chinese) doi: 10.11779/CJGE201611001
[2]	PRIEST J A, POWRIE W, YANG L, et al. Measurements of transient ground movements below a ballasted railway line[J]. Géotechnique, 2010, 60(9): 667–677. doi: 10.1680/geot.7.00172
[3]	SHAER A A, DUHAMEL D, SAB K, et al. Experimental settlement and dynamic behavior of a portion of ballasted railway track under high speed trains[J]. Journal of Sound and Vibration, 2008, 316(1/2/3/4/5): 211–233.
[4]	BIAN X C, JIANG H G, CHENG C, et al. Full-scale model testing on a ballastless high-speed railway under simulated train moving loads[J]. Soil Dynamics and Earthquake Engineering, 2014, 66: 368–384. doi: 10.1016/j.soildyn.2014.08.003
[5]	CHEBLI H, CLOUTEAU D, SCHMITT L. Dynamic response of high-speed ballasted railway tracks: 3D periodic model and in situ measurements[J]. Soil Dynamics and Earthquake Engineering, 2008, 28(2): 118–131. doi: 10.1016/j.soildyn.2007.05.007
[6]	YANG L A, POWRIE W, PRIEST J A. Dynamic stress analysis of a ballasted railway track bed during train passage[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2009, 135(5): 680–689. doi: 10.1061/(ASCE)GT.1943-5606.0000032
[7]	GALVÍN P, ROMERO A, DOMÍNGUEZ J. Vibrations induced by HST passage on ballast and non-ballast tracks[J]. Soil Dynamics and Earthquake Engineering, 2010, 30(9): 862–873. doi: 10.1016/j.soildyn.2010.02.004
[8]	ZHAI W M, HE Z X, SONG X L. Prediction of high-speed train induced ground vibration based on train-track-ground system model[J]. Earthquake Engineering and Engineering Vibration, 2010, 9(4): 545–554. doi: 10.1007/s11803-010-0036-y
[9]	BHADURI A, CHOUDHURY D. Steady-state response of flexible combined pile-raft foundation under dynamic loading[J]. Soil Dynamics and Earthquake Engineering, 2021, 145: 106664. doi: 10.1016/j.soildyn.2021.106664
[10]	庄妍, 李劭邦, 崔晓艳, 等. 高铁荷载下桩承式路基动力响应及土拱效应研究[J]. 岩土力学, 2020, 41(9): 3119–3130. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX202009030.htm ZHUANG Yan, LI Shao-bang, CUI Xiao-yan, et al. Investigation on dynamic response of subgrade and soil arching effect in piled embankment under high-speed railway loading[J]. Rock and Soil Mechanics, 2020, 41(9): 3119-3130. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX202009030.htm
[11]	吕玺琳, 马泉. 高铁复合结构路基荷载传递及沉降数值模拟[J]. 铁道工程学报, 2018, 35(7): 1–6. doi: 10.3969/j.issn.1006-2106.2018.07.001 LÜ Xi-lin, MA Quan. Numerical research on the load transfer and settlement of composite structural subgrade of high-speed railway[J]. Journal of Railway Engineering Society, 2018, 35(7): 1–6. (in Chinese) doi: 10.3969/j.issn.1006-2106.2018.07.001
[12]	THACH P N, LIU H L, KONG G Q. Evaluation of PCC pile method in mitigating embankment vibrations from a high-speed train[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2013, 139(12): 2225–2228. doi: 10.1061/(ASCE)GT.1943-5606.0000941
[13]	陈宏伟, 徐林荣. 高速铁路CFG桩-筏复合地基现场测试研究[J]. 土木建筑与环境工程, 2014, 36(6): 60–66. https://www.cnki.com.cn/Article/CJFDTOTAL-JIAN201406010.htm CHEN Hong-wei, XU Lin-rong. Analysis of field test high-speed railway CFG pile-raft composite foundation[J]. Journal of Civil, Architectural & Environmental Engineering, 2014, 36(6): 60–66. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-JIAN201406010.htm
[14]	徐林荣, 牛建东, 吕大伟, 等. 软基路堤桩-网复合地基试验研究[J]. 岩土力学, 2007, 28(10): 2149–2154, 2160. doi: 10.3969/j.issn.1000-7598.2007.10.028 XU Lin-rong, NIU Jian-dong, LÜ Da-wei, et al. Experimental study on pile-net composite foundation of high-speed railway on soft soils[J]. Rock and Soil Mechanics, 2007, 28(10): 2149–2154, 2160. (in Chinese) doi: 10.3969/j.issn.1000-7598.2007.10.028
[15]	吕玺琳, 马泉, 方航. 高铁桩网复合结构路基长期运营沉降模型试验研究[J]. 岩土工程学报, 2017, 39(增刊1): 140–144. doi: 10.11779/CJGE2017S1028 LÜ Xi-lin, MA Quan, FANG Hang. Model tests on the long-term settlement of pile-net composite structure subgrade for high-speed railways[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(S1): 140–144. (in Chinese) doi: 10.11779/CJGE2017S1028
[16]	LV Y R, LIU H L, DING X M, et al. Field tests on bearing characteristics of X-section pile composite foundation[J]. Journal of Performance of Constructed Facilities, 2012, 26(2): 180–189. doi: 10.1061/(ASCE)CF.1943-5509.0000247
[17]	LIU H L, ZHOU H, KONG G Q. XCC pile installation effect in soft soil ground: a simplified analytical model[J]. Computers and Geotechnics, 2014, 62: 268–282. doi: 10.1016/j.compgeo.2014.07.007
[18]	YIN F, ZHOU H, LIU H L, et al. Effects of asphalt overlay on XCC pile-supported embankment vibration from a moving vehicle[J]. Soil Dynamics and Earthquake Engineering, 2018, 112: 18–23. doi: 10.1016/j.soildyn.2018.04.049
[19]	NIU T T, LIU H L, DING X M, et al. Model tests on XCC-piled embankment under dynamic train load of high-speed railways[J]. Earthquake Engineering and Engineering Vibration, 2018, 17(3): 581–594. doi: 10.1007/s11803-018-0464-7
[20]	牛婷婷, 孙广超. 高速铁路X形桩桩网复合地基动态响应分析[J]. 岩土力学, 2021, 42(5): 1266–1280. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX202105008.htm NIU Ting-ting, SUN Guang-chao. Dynamic response analysis of X-pile-net composite embankment in high-speed railway[J]. Rock and Soil Mechanics, 2021, 42(5): 1266–1280. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX202105008.htm
[21]	SUN G C, KONG G Q, LIU H L, et al. Vibration velocity of X-section cast-in-place concrete (XCC) pile–raft foundation model for a ballastless track[J]. Canadian Geotechnical Journal, 2017, 54(9): 1340–1345. doi: 10.1139/cgj-2015-0623
[22]	孙广超, 刘汉龙, 孔纲强, 等. 振动波型对X形桩桩–筏复合地基动力响应影响的模型试验研究[J]. 岩土工程学报, 2016, 38(6): 1021-1029. http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/abstract/abstract16581.shtml SUN Guang-chao, LIU Han-long, KONG Gang-qiang, et al. Model tests on effect of vibration waves on dynamic response of XCC pile-raft composite foundation[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(6): 1021–1029. (in Chinese) http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/abstract/abstract16581.shtml
[23]	孙广超, 孔纲强, 刘汉龙, 等. 荷载振幅对X形桩-筏复合地基动力响应特性影响的试验研究[J]. 中南大学学报(自然科学版), 2020, 51(2): 499–506. https://www.cnki.com.cn/Article/CJFDTOTAL-ZNGD202002023.htm SUN Guang-chao, KONG Gang-qiang, LIU Han-long, et al. Experimental study on load amplitude impact on dynamic response of XCC pile-raft composite foundation[J]. Journal of Central South University (Science and Technology), 2020, 51(2): 499–506. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZNGD202002023.htm
[24]	高速铁路设计规范: TB 10621—2014[S]. 2015. Code for Design of High Speed Railway: TB 10621—2014[S]. 2015. (in Chinese)
[25]	徐进. 高速铁路路基模型试验系统研究与动力分析[D]. 长沙: 中南大学, 2012. XU Jin. Research on Model Test System of High Speed Railway Subgrade and Dynamics Analysis[D]. Changsha: Central South University, 2012. (in Chinese)
[26]	杨挺, 刘汉龙, 孔纲强. 现浇X形桩复合地基静载荷试验研究[J]. 地下空间与工程学报, 2016, 12(3): 662–669. https://www.cnki.com.cn/Article/CJFDTOTAL-BASE201603014.htm YANG Ting, LIU Han-long, KONG Gang-qiang. Static load field test of X-section cast-in-place pile composite foundation[J]. Chinese Journal of Underground Space and Engineering, 2016, 12(3): 662–669. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-BASE201603014.htm
[27]	丁选明, 孔纲强, 刘汉龙, 等. 现浇X形桩桩-土荷载传递规律现场试验研究[J]. 岩土力学, 2012, 33(2): 489–493. doi: 10.3969/j.issn.1000-7598.2012.02.027 DING Xuan-ming, KONG Gang-qiang, LIU Han-long, et al. Field test study of pile-soil load transfer characteristics of X-shaped cast-in-place pile[J]. Rock and Soil Mechanics, 2012, 33(2): 489–493. (in Chinese) doi: 10.3969/j.issn.1000-7598.2012.02.027
[28]	HUANG J J, SU Q, LIU T, et al. Vibration and long-term performance analysis of pile-plank-supported low subgrade of ballastless track under excitation loads[J]. Shock and Vibration, 2015, 2015: 404627.