Test study on working property of water-proof layer of cutting subgrade under vibrating load in expansive soil areas
YANG Guo-lin1, QIU Ming-ming1, HE Xu1,2, SHEN Quan1
1. School of civil engineering, central south university, Changsha Hunan 410075, China;
2. China Railway 19th Bureau Group Co. Ltd. Liaoyang Liaoning 111000，China
The defect of cutting subgrade in expansive soil is a key technical problem of railway engineering that need to solve urgently. According to the actual conditions of the new Yun-Gui lines of high-speed railway project in expansion area, the model test of cutting subgrade of expansive soil is carrying out to study the dynamic performance and waterproof effect of new water-proof constructer layer under three kinds of extreme service condition (dry, raining, and underground water rising), and combining with the field measured data is analyzed. The analysis results show that the influence of service environment on dynamic characteristics of new subgrade structure is significant. The dynamic stress, velocity and acceleration of subgrade are increase to different extents when raining and underground water rising. The waterproof layer can accelerate the attenuation of dynamic stress in subgrade, the dynamic stress along the transverse distance is "Z" shape distribution, and the peak value appear at below the track, and it is less affected by vibration approximately 5.0 metres from the center line. The New type waterproof structure layer can meet requirements of waterproof, impermeable, anti-vibration and impact-absorbing, and it has positive significance to improve the ride performance and stability of railway track. The conclusion can be referenced for newly built Yun-Gui high-speed railway of expansive soil and similar projects.
杨果林1，邱明明1，何 旭1,2，申 权1. 膨胀土路堑基床新型防水层振动荷载下服役性能试验研究[J]. 振动与冲击, 2016, 35(5): 1-7.
YANG Guo-lin1, QIU Ming-ming1, HE Xu1,2, SHEN Quan1. Test study on working property of water-proof layer of cutting subgrade under vibrating load in expansive soil areas. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(5): 1-7.
[1] 郑建龙.公路膨胀土工程理论与技术[M].北京:人民交通出版社,2013. (ZHENG Jianlong. Theory and technology for highway expansive soil engineering[M]. Beijing: China communications press, 2013. (in Chinese))
[2] ITO Maki, AZAM Shahid. Determination of swelling and shrinkage properties of undisturbed expansive soils[J].Geotech Geol Eng, 2010, 28: 413-422.
[3] 冯玉勇,张永双,曲永新,等.南昆铁路百色盆地膨胀土路堤病害机理研究[J].岩土工程学报, 2001,23(4): 463-467. (FENG Yu-yong, ZHANG Yong-shuang, QU Yong-xin, et al. Mechanism of embankment defects caused by expensive soils in Baise Basin Nankun railway[J]. Chinese Journal of Geotechnical Engineering, 2001, 23(4): 463-467. (in Chinese))
[4] 王亮亮,杨果林,刘黄伟,等.云桂铁路弱-中膨胀土膨胀力试验研究[J].中南大学学报(自然科学版), 2013,44(11): 4659-4663.(WANG Liang-liang, YANG Guolin, LIU Huangwei, et al. In-situ testing studies of swelling pressure on weak-medium expansive soil of Yun-Gui Railway[J]. Journal of Central South University (Science and Technology),2013,44(11): 4659-4663. (in Chinese))
[5] TRIPATHY S, Subba RAO K S. Cyclic swell-shrink behaviour of a compacted expansive soil[J]. Geotechnical and Geological Engineering, 2009, 27(1): 89-103.
[6] 陈正汉,方祥位,朱元青,等.膨胀土和黄土的细观结构及其演化规律研究[J].岩土力学,2009,30(1):1-11.(CHEN Zheng-han, FANG Xiang-wei, ZHU Yuan-qing, et al. Research on meso-structures and their evolution laws of expansive soil and loess[J]. Rock and Soil Mechanics, 2009,30(1),1-11. (in Chinese))
[7] TAKEMIYA H. Simulation of track-ground vibrations due to a high-speed train: the case of X-2000 at Ledsgard[J]. Journal of Sound and Vibration, 2003, 261(3):503-526.
[8] PEDRO A C, RUI C, ANTONIO S C, et al. Influence of soil non-linearity on the dynamic response of high-speed railway track[J].Soil Dynamics and Earthquake Engineering,2010,30(4):221-235.
[9] 韩自力,张千里.既有线提速路基动应力分析[J].中国铁道科学,2005, 26(5):1-5. (Han Zi-li, Zhang Qian-li. Dynamic Stress Analysis on Speed-increase Subgrade of Exisiting Railway[J].China railway science,2005, 26(5):1-5. (in Chinese))
[10] GAO G Y, CHEN Q S, HE J F, et al. Investigation of ground vibration due to trains moving on saturated multi-layered ground by 2.5D finite element method[J]. Soil Dynamics and Earthquake Engineering, 2012,40(1):87-98.
[11] 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].西南交通大学学报,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. (in Chinese))
[12] Shaer A Al, Duhamel D, K Sab, Foret G, Schmitt L. Experimental settlement and dynamic behavior of a portion of ballasted railway track under high speed trains[J] .Journal of Sound and Vibration, 2008,316(5):211-233.
[13] Tatsuya Ishikawa, Etsuo Sekine, Seiichi Miura. Cyclic deformation of granular material subjected to moving-wheel loads[J]. Canadian Geotechnical Journal, 2011(48):691-703.
[14] 郭志广,魏丽敏,何群,等.武广高速铁路无砟轨道路基动力响应试验研究[J].振动与冲击, 2013,32(14), 148-163.(Guo Zhiguang, Wei Limin, He Qun, et al. Tests for dynamic response of ballastless track subgrade of Wu-guang high-speed railway[J]. Journal of vibration and shock, 2013,32(14),148-163. (in Chinese))
[15] 杨果林,王亮亮,房以河,等.云桂高速铁路不同防水层基床动力特性现场试验[J].岩石力学与工程学报,2014,33(8):1672-1678. (YANG Guolin,WANG Liang-liang, FANG Yihe, et al. In-situ test on dynamic characteristics of cutting subgrade with different waterproof layers along Yun-Gui high-speed railway[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(8): 1672-1678. (in Chinese))
[16] TB10621-2009 高速铁路设计规范(试行)[S]. 2009. (TB10621-2009 Code for design of high speed railway[S]. 2009. (in Chinese))
[17] 胡一峰,李怒放.高速铁路无砟轨道路基设计原理[M]. 北京: 中国铁道出版社, 2010. (HU Yifeng, LI Nufang. Theory of ballastless track-subgrade for high speed railway[M]. Beijing: China Railway Publishing House, 2010. (in Chinese)
