饱和软土二维-三维列车振动响应对比分析

doi:10.3969/j.issn.0258-2724.2017.06.012

黄强^1,2,
叶斌^1,2,
黄宏伟^1,2,
张冬梅^1,2,
张锋³

基金项目:

国家自然科学基金资助项目（51538009）

详细信息

作者简介:
黄强(1987-),男,博士研究生,研究方向为地铁列车振动对软土盾构隧道影响,电话:1881787931,E-mail:qianghuang1987@163.com

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出版历程
- 收稿日期:2016-04-21
- 刊出日期:2017-12-25

Comparison of 2D and 3D Dynamic Responses of Saturated Soft Soil due to Metro Train Load

摘要

摘要:针对岩土工程中常用二维模型等效三维模型进行数值计算的方法，对列车运行引起的二维和三维动力响应进行了分析.根据钢轨-扣件-隧道-地基纵向模型得到作用于隧道道床上的振动荷载，基于循环流动本构模型和土-水完全耦合理论，计算了列车平均时速下饱和软土层二维和三维的振动响应规律.研究结果表明：两种模型的地表振动加速度、位移以及隧道周围超孔隙水压力在横截面内规律基本相似但数值相差较大；二维-三维地表加速度比和位移比最大值分别可达9倍和6倍，加速度振级相差可达15 dB；隧道周围的二维-三维超孔压比在1.5~3.5之间，单次振动超孔压累积值可达4.36 kPa和1.69 kPa，且在隧道竖轴左右45°及135°位置处超孔压力累积最为明显；振动荷载形式、纵向土层振动、固结速度是造成饱和土软土二维-三维列车振动响应差异的主要原因.
- 饱和软土/
- 列车振动荷载/
- 循环流动模型/
- 最大振动加速度/
- 超孔隙水压力/
- 二维-三维振动响应
Abstract:As for the common practice that the two-dimensional(2D) model is approximately employed to the three-dimensional(3D) model in numerical calculation of geotechnical engineering, 2D and 3D dynamic responses induced by the metro train vibration were analyzed. Train vibration load on the track bed was determined firstly according to the rail-fastener-tunnel-subgrade longitudinal model, then 2D and 3D dynamic responses of the tunnel and the saturated soft ground were simulated based on the cyclic mobility model and the fully coupled soil-water theory when the metro train moved at an average speed. The results show that:dynamic responses of the ground surface acceleration, displacement and excess pore water pressure (EPWP) around the tunnel in 2D and 3D models are similar but significant differences exist in the quantitative manner.The maximum acceleration and displacement ratios between 2D and 3D models can be as much as ninefold and sixfold, with a maximum acceleration level discrepancy of 15 dB; the ratio of EPWP around the tunnel ranges from 1.5 to 3.5, and the accumulated EPWP in 2D and 3D models reach 4.36 kPa and 1.69 kPa, respectively, the accumulation of EPWP is obvious at the locations of 45° and 135° around the tunnel. Train vibration load, longitudinal soil vibration and consolidation rate are the three reasons accounting for the response discrepancy between 2D and 3D models.
- saturated soft soil/
- train vibration load/
- cyclic mobile model/
- maximum vibration acceleration/
- excess pore water pressure/
- 2D-3D vibration response

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参考文献 (25)

刘维宁,夏禾,郭文军. 地铁列车振动的环境响应[J]. 岩石力学与工程学报,1996,15(增刊):586-593. LIU Weining, XIA He, GUO Wenjun. Study of vibration effects of underground trains on surrounding environment[J]. Chinese Journal of Rock Mechanics and Engineering, 1996, 15(Sup.):586-593.

陈卫军,张璞. 列车动载作用下交叠隧道动力响应数值模拟[J]. 岩土力学,2003,23(6):770-774. CHEN Weijun, ZHANG Pu. Numerical simulation of dynamic response of overlap tunnels in close proximity due to train's vibrating load[J]. Rock and Soil Mechanics, 2003, 23(6):770-774.

GARDIEN W, STUIT H G. Modelling of soil vibrations from railway tunnels[J]. Journal of Sound and Vibration, 2003, 267:605-619.

HAMID R N, MORTEZA A, HAMID H. Numerical analysis of ground surface vibration induced by underground train movement[J]. Tunnelling and Underground Space Technology, 2012, 29:1-9.

孔祥辉,蒋关鲁,李安洪,等. 基于三维数值模拟的铁路路基动力特性分析[J]. 江南娱乐网页版入口官网下载安装学报,2014,49(3):406-411. KONG Xianghui, JIANG Guanlu, LI Anhong, et al. Analysis of dynamic characteristics of railway subgrade based on three-dimensional numerical simulation[J]. Journal of Southwest Jiaotong University, 2014, 49(3):406-411.

YANG Y B, HUANG H H. A 2.5D finite/infinite element approach for modelling visco-elastic bodies subjected to moving loads[J]. Internaltional Journal for Numerical Methods in Engineering, 2001, 51(11):1317-1336.

SHENG X, JONES C J, THOMPSON D J. Modelling ground vibration from railways using wavenumber finite-and boundary-element methods[J]. Proceedings of Royal Society, 2005, 461:2043-2070.

ANDERSEN L, JONES C. Coupled boundary and finite element analysis of vibration from railway tunnels-a comparison of two and three dimensional models[J]. Journal of Sound and Vibration, 2006, 293:611-625.

徐斌,高亮,雷晓燕,等. 移动荷载与土体孔洞相互作用的2.5D边界元法分析[J]. 江南娱乐网页版入口官网下载安装学报,2013,48(4):659-665. XU Bin, GAO Liang, LEI Xiaoyan, et al. Analysis of dynamic interaction between hole embedded in saturated soil and moving loads[J]. Journal of Southwest Jiaotong University, 2013, 48(4):659-665.

王田友,丁洁民,楼梦麟. 地铁运行引起场地振动的荷载与分析方法[J]. 工程力学,2010,27(1):195-201. WANG Tianyou, DING Jiemin, LOU Menglin. Loads for subway induced free field vibration and analysis method[J]. Engineering Mechanics, 2010, 27(1):195-201.

REAL T, ZAMORANO C, RIBES F, et al. Train-induced vibration prediction in tunnels using 2D and 3D FEM models in time domain[J]. Tunnelling and Underground Space Technology, 2012, 49:376-383.

XU Qingyuan, XIAO Zucai, LIU Tao, et al. Comparison of 2D and 3D prediction models for environmental vibration induced by underground railway with two types of tracks[J]. Computers and Geotechnics, 2015, 68:169-183.

刘明,黄茂松,柳艳华. 车振荷载引起的软土越江隧道长期沉降分析[J]. 岩土工程学报,2009,31(11):1703-1709. LIU Ming, HUNAG Maosong, LIU Yanhua. Long-term settlement of tunnels across a river induced by vehicle operation[J]. Chinese Journal of Geotechnical Engineering, 2009, 31(11):1703-1709.

姜洲,高广远,赵宏. 地铁行车速度对盾构隧道沉降的影响分析[J]. 岩土力学,2015,36(11):3283-3292. JIANG Zhou, GAO Guangyun, ZHAO Hong. Influence of subway train speed on operation-induced settlement of shield tunnel[J]. Rock and Soil Mechanics, 2015, 36(11):3283-3292.

ZHANG F, YE B, TOSHIHIRO N, et al. Explanation of cyclic mobility of soils:approach by stress-induced anisotropy[J]. Soils and Foundations, 2007, 47(4):635-648.

夏志凡. 基于完全耦合理论的饱和土地基上结构动力响应研究[D]. 上海:上海交通大学,2010.

LARS H. Simulation and analyses of train-induced ground vibrations in finite element models[J]. Soil Dynamics and Earthquake Engineering, 2003, 23(5):403-413.

XIA Z F, YE G L, WANG, J H, et al. Fully coupled numerical analysis of repeated shake-consolidation process of earth embankment on liquefiable foundation[J]. Soil Dynamics and Earthquake Engineering, 2010, 30(11):1309-1318.

BAO X H, MORIKAWA Y, KONDO Y, et al. Shaking table test on reinforcement effect of partial ground improvement for group-pile foundation and its numerical simulation[J]. Soils and Foundations, 2012, 52(6):1043-1061.

李永强,景立平,单振动,等. 基于两相介质之土层弹塑性大变形地震反应分析[J]. 岩土工程学报,2015,31(11):1986-1991. LI Yongqiang, JING Liping, DAN Zhendong, et al. Nonlinear fround response based on the theory of wave propagation in two-phase media[J]. Chinese Journal of Geotechnical Engineering, 2015, 31(11):1986-1991.

盛佳韧. 上海黏土力学特性综合试验及本构模拟[D]. 上海:上海交通大学,2012.

YE B. Experiment and numerical simulation of repeated liquefaction-consolidation of sand[D]. Gifu:Gifu University, 2007.

中华人民共和国行业标准编写组. GB10070-88城市区域环境振动标准[S]. 北京:中国标准出版社,1989.

邓飞皇. 地铁营运动荷载下软土盾构隧道动力响应及动力特性研究[D]. 广州:华南理工大学,2007.

HUANG Q, HUANG H W, ZHANG D M, et al. Modelling of train vibration induced settlement to metro tunnel in saturated clay[C]//The 6th Asian-Pacific Symposium on Structural Reliability and its Applications. Shanghai:Tongji University Press, 2016:487-492.

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