Influence of pile-raft foundation reinforcement on subgrade of adjacent existing railway

LIU Wei-zheng; XU Lin-rong; ZUO Shen; LIU Zhang-hong; CHEN Peng-fei

doi:10.19818/j.cnki.1671-1637.2015.03.003

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LIU Wei-zheng, XU Lin-rong, ZUO Shen, LIU Zhang-hong, CHEN Peng-fei. Influence of pile-raft foundation reinforcement on subgrade of adjacent existing railway[J]. Journal of Traffic and Transportation Engineering, 2015, 15(3): 16-26. doi: 10.19818/j.cnki.1671-1637.2015.03.003

Citation:

LIU Wei-zheng, XU Lin-rong, ZUO Shen, LIU Zhang-hong, CHEN Peng-fei. Influence of pile-raft foundation reinforcement on subgrade of adjacent existing railway[J]. Journal of Traffic and Transportation Engineering, 2015, 15(3): 16-26. doi: 10.19818/j.cnki.1671-1637.2015.03.003

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Influence of pile-raft foundation reinforcement on subgrade of adjacent existing railway

doi: 10.19818/j.cnki.1671-1637.2015.03.003

1.
School of Civil Engineering, Central South University, Changsha 410075, Hunan, China
2.
School of Transportation and Civil Engineering, Shandong Jiaotong University, Jinan 250023, Shandong, China

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Author Bio:
LIU Wei-zheng(1982-), male, lecturer, PhD, +86-731-82656563, liuwz2011@csu.edu.cn
Received Date: 2015-01-13
Publish Date: 2015-06-20

Abstract

Abstract

During the process of pile-raft foundation reinforcement of new railway, the deformation and stress of subgrade for adjacent existing railway were measured in situ by using stress spade, horizontal strain gauge and inclinometer, and the mechanical characteristics and deformation laws of subgrade were analyzed. In order to minimize test error, a finite element model (FEM) was built to calculate the subgrade deformation and stability, the conversion factor of slope horizontal displacement was obtained, and the maximum shear stress and slope safety factors of subgrade under different excavation depths were calculated using the FEM. Based on the monitoring and calculated results, the optimized protection measures were proposed and applied during the construction process, such as pile-raft interval construction, changing pile eonstruction, and hunging mesh with steel band and grouting along the subgrade slope. The protection effect was verified with the data from track inspection car by using scoring method and standard difference method. Analysis result indicates that the cumulative slope horizontal displacement of slope foot for adjacent existing railway is 24.25 mm during construction process, and the lateral displacement per day is less than 0. 59 mm. The horizontal displacement is sensitive to the construction process and can be used as a key indicator to describe the stability of subgrade. The horizontal stress of foundation soil in the depth range from 0 to 9 m between the new railway and existing railway increases and then decreases, the compressive stress is less than 10 kPa and the stress level does not change significantly in different construction stages. The safety factor of slope decreases from 1.08 to 0.54 as the excavation depth reach 2.2 m under the soak condition, and then the state of subgrade is unstable failure, the protection measures must be adopted in the subgrade slope. The track quality index(TQI) of the existing line increases by 129.58~during the construction process, which indicates the large linear fluctuation of geometry for existing railway, but the TQI is less than its safety limit, which indicates that the deformation of subgrade is controlled effectively by using optimized protection measures.
- intercity railway,
- subgrade protection,
- pile-raft foundation reinforcement,
- adjacent existing railway,
- field test

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References

[1]	MáRQUEZ G F P, ROBERTS C, TOBIAS A M. Railway point mechanisms: condition monitoring and fault detection[J]. Journal of Rail and Rapid Transit, 2010, 224(1): 35-44. doi: 10.1243/09544097JRRT289
[2]	廖立坚, 杨新安, 杜攀峰. 铁路路基雷达探测数据的处理[J]. 中国铁道科学, 2008, 29(3): 18-23. doi: 10.3321/j.issn:1001-4632.2008.03.004 LIAO Li-jian, YANG Xin-an, DU Pan-feng. Processing GPR detection data of railway subgrade[J]. China Railway Science, 2008, 29(3): 18-23. (in Chinese) doi: 10.3321/j.issn:1001-4632.2008.03.004
[3]	李新星. 邻近基坑开挖的运营地铁车站结构安全度分析[J]. 岩土力学, 2009, 30(增2): 382-386. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2009S2083.htm LI Xin-xing. Security analysis of running metro station structure adjacent to foundation excavation[J]. Rock and Soil Mechanics, 2009, 30(S2): 382-386. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2009S2083.htm
[4]	安关峰, 宋二祥. 广州地铁琶州塔站工程基坑监测分析[J]. 岩土工程学报, 2005, 27(3): 333-337. doi: 10.3321/j.issn:1000-4548.2005.03.018 AN Guan-feng, SONG Er-xiang. The analysis of excavation monitoring for the Pazhouta Subway Station in Guangzhou[J]. Chinese Journal of Geotechnical Engineering, 2005, 27(3): 333-337. (in Chinese) doi: 10.3321/j.issn:1000-4548.2005.03.018
[5]	丁勇春, 戴斌, 王建华, 等. 某邻近地铁隧道深基坑施工监测分析[J]. 北京工业大学学报, 2008, 34(5): 492-497. https://www.cnki.com.cn/Article/CJFDTOTAL-BJGD200805011.htm DING Yong-chun, DAI Bin, WANG Jian-hua, et al. Field observation of a deep excavation adjacent to subway tunnels[J]. Journal of Beijing University of Technology, 2008, 34(5): 492-497. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-BJGD200805011.htm
[6]	VORSTER T E B, KLAR A, SOGA K, et al. Estimating the effects of tunneling on existing pipelines[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2005, 131(11): 1399-1410. doi: 10.1061/(ASCE)1090-0241(2005)131:11(1399)
[7]	高子坤, 施建勇. 考虑桩体几何特征的压桩挤土效应理论解答研究[J]. 岩土工程学报, 2010, 32(6): 956-962. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201006029.htm GAO Zi-kun, SHI Jian-yong. Theoretical solutions of soil-squeezing effect due to pile jacking considering geometrical characteristics of a pile[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(6): 956-962. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201006029.htm
[8]	罗战友, 夏建中, 龚晓南, 等. 压桩过程中静压桩挤土位移的动态模拟和实测对比研究[J]. 岩石力学与工程学报, 2008, 27(8): 1709-1714. doi: 10.3321/j.issn:1000-6915.2008.08.023 LUO Zhan-you, XIA Jian-zhong, GONG Xiao-nan, et al. Comparative study of dynamic simulation for compacting displacement of jacked pile and in-situ test[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(8): 1709-1714. (in Chinese) doi: 10.3321/j.issn:1000-6915.2008.08.023
[9]	POWRIE W, DALY M P. Centrifuge model tests on embedded retaining walls supported by earth berms[J]. Geotechnique, 2002, 52(2): 89-106. doi: 10.1680/geot.2002.52.2.89
[10]	陈林杰, 梁波, 林旺春, 等. 隧道施工灾害处治系统软件开发[J]. 地下空间与工程学报, 2010, 6(3): 606-610. https://www.cnki.com.cn/Article/CJFDTOTAL-BASE201003032.htm CHEN Lin-jie, LIANG Bo, LIN Wang-chun, et al. Development of software for treatment system of tunnel construction disasters[J]. Chinese Journal of Underground Space and Engineering, 2010, 6(3): 606-610. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-BASE201003032.htm
[11]	吴俊, 毛海和, 应松, 等. 地质雷达在公路隧道短期地质超前预报中的应用[J]. 岩土力学, 2003, 24(增1): 154-157. WU Jun, MAO Hai-he, YING Song, et al. Application of ground probing radar to short-term geological forecast for tunnel construction[J]. Rock and Soil Mechanics, 2003, 24(S1): 154-157. (in Chinese)
[12]	王国斌, 利奕年, 杨文东. 隧道地质超前预报综合方法及应用研究[J]. 武汉理工大学学报, 2010, 32(3): 58-60, 69. https://www.cnki.com.cn/Article/CJFDTOTAL-WHGY201003014.htm WANG Guo-bin, LI Yi-nian, YANG Wen-dong. Research on the geological prediction comprehensive method of tunnels and its application[J]. Journal of Wuhan University of Technology, 2010, 32(3): 58-60, 69. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-WHGY201003014.htm
[13]	SEN M K, STOFFA P L, SEIFOULLAEV R K. Numerical and field investigations of GPR: toward an airborne GPR[J]. Subsurface Sensing Technologies and Applications, 2003, 4(1): 41-60. doi: 10.1023/A:1023011413969
[14]	邬凯, 盛谦, 张勇慧, 等. 山区公路路基边坡地质灾害远程监测预报系统开发及应用[J]. 岩土力学, 2010, 31(11): 3683-3687. doi: 10.3969/j.issn.1000-7598.2010.11.054 WU Kai, SHENG Qian, ZHANG Yong-hui, et al. Development of real-time remote monitoring and forecasting system for geological disasters at subgrade slopes of mountainous highways and its application[J]. Rock and Soil Mechanics, 2010, 31(11): 3683-3687. (in Chinese) doi: 10.3969/j.issn.1000-7598.2010.11.054
[15]	时瑾, 邹凯, 谷爱军, 等. 高速铁路高架线路列车运营对既有线路基的影响研究[J]. 岩土力学, 2013, 34(增2): 285-290. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2013S2047.htm SHI Jin, ZOU Kai, GU Ai-jun, et al. Research on effect of train running on elevated line of high-speed railway on existing railway subgrade[J]. Rock and Soil Mechanics, 2013, 34(S2): 285-290. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2013S2047.htm
[16]	阎宗岭, 杨静, 栗海涛, 等. 基于GPRS的山区库岸公路路基无线远程健康监测[J]. 重庆交通大学学报: 自然科学版, 2012, 31(4): 803-806. https://www.cnki.com.cn/Article/CJFDTOTAL-CQJT201204018.htm YAN Zong-ling, YANG Jing, LI Hai-tao, et al. Wireless remote health monitoring of mountainous highway subgrade along reservoir bank based on GPRS[J]. Journal of Chongqing Jiaotong University: Natural Science, 2012, 31(4): 803-806. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-CQJT201204018.htm
[17]	张格明, 罗林. 轨检车测取的轨道谱精度分析[J]. 铁道学报, 1999, 21(3): 67-71. doi: 10.3321/j.issn:1001-8360.1999.03.015 ZHANG Ge-ming, LUO Lin. Accuracy analysis of track irregularity spectrum density obtained from track geometry inspection car[J]. Journal of the China Railway Society, 1999, 21(3): 67-71. (in Chinese) doi: 10.3321/j.issn:1001-8360.1999.03.015
[18]	郭保青, 朱力强, 史红梅, 等. 基于单幅图像的轨检车位置校正方法研究[J]. 铁道学报, 2011, 33(12): 72-77. doi: 10.3969/j.issn.1001-8360.2011.12.012 GUO Bao-qing, ZHU Li-qiang, SHI Hong-mei, et al. Research on track inspection car position correction method by use of single image[J]. Journal of the China Railway Society, 2011, 33(12): 72-77. (in Chinese) doi: 10.3969/j.issn.1001-8360.2011.12.012
[19]	徐林荣. 沪宁城际铁路施工安全与沉降变形技术研究[R]. 长沙: 中南大学, 2010. XU Lin-rong. Research on construction safety and settlement controlling measure of Shanghai-Nanjing Intercity Railway[R]. Changsha: Central South University, 2010. (in Chinese)
[20]	左珅, 徐林荣. 新线地基施工对邻近运营铁路路基稳定性影响研究[J]. 铁道科学与工程学报, 2014, 11(1): 93-100. doi: 10.3969/j.issn.1672-7029.2014.01.015 ZUO Shen, XU Lin-rong. Reaserch of stability effect on adjacent existing railing lines due to new lines construction[J]. Journal of Railway Science and Engineering, 2014, 11(1): 93-100. (in Chinese) doi: 10.3969/j.issn.1672-7029.2014.01.015
[21]	梁波, 罗红, 孙常新. 高速铁路振动荷载的模拟研究[J]. 铁道学报, 2006, 28(4): 89-94. doi: 10.3321/j.issn:1001-8360.2006.04.018 LIANG Bo, LUO Hong, SUN Chang-xin. Simulated study on vibration load of high speed railway[J]. Journal of the China Railway Society, 2006, 28(4): 89-94. (in Chinese) doi: 10.3321/j.issn:1001-8360.2006.04.018
[22]	孙宏磊, 蔡袁强, 徐长节. 高速列车荷载作用下路轨系统及饱和地基的动力响应[J]. 浙江大学学报: 工学版, 2008, 42(11): 2002-2008. doi: 10.3785/j.issn.1008-973X.2008.11.029 SUN Hong-lei, CAI Yuan-qiang, XU Chang-jie. Dynamic responses of track system and poroelastic soil under high-speed train load[J]. Journal of Zhejiang University: Engineering Science, 2008, 42(11): 2002-2008. (in Chinese) doi: 10.3785/j.issn.1008-973X.2008.11.029
[23]	白冰, 李春峰. 地铁列车振动作用下近距离平行隧道的弹塑性动力响应[J]. 岩土力学, 2009, 30(1): 123-128. doi: 10.3969/j.issn.1000-7598.2009.01.020 BAI Bing, LI Chun-feng. Elastoplastic dynamic responses of close parallel metro tunnels to vibration loading[J]. Rock and Soil Mechanics, 2009, 30(1): 123-128. (in Chinese) doi: 10.3969/j.issn.1000-7598.2009.01.020
[24]	徐林荣, 王永和, 魏丽敏. 加筋土陡边坡破坏模式的量化指标的合理选取探讨[J]. 中国铁道科学, 1998, 19(4): 95-102. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGTK804.012.htm XU Lin-rong, WANG Yong-he, WEI Li-min. Proper choice of measurement index for the failure mode of reinforced steep slope[J]. China Railway Science, 1998, 19(4): 95-102. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZGTK804.012.htm
[25]	凌天清, 周滨, 吴春波, 等. 筋土界面摩擦特性影响因素分析[J]. 交通运输工程学报, 2009, 9(5): 7-12. doi: 10.3321/j.issn:1671-1637.2009.05.002 LING Tian-qing, ZHOU Bin, WU Chun-bo, et al. Study of influence factors on tendons-soil interface characteristic[J]. Journal of Traffic and Transportation Engineering, 2009, 9(5): 7-12. (in Chinese) doi: 10.3321/j.issn:1671-1637.2009.05.002

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Influence of pile-raft foundation reinforcement on subgrade of adjacent existing railway

doi: 10.19818/j.cnki.1671-1637.2015.03.003

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Influence of pile-raft foundation reinforcement on subgrade of adjacent existing railway

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