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CLC number: U213.11

On-line Access: 2016-10-08

Received: 2015-11-04

Revision Accepted: 2016-02-18

Crosschecked: 2016-09-12

Cited: 1

Clicked: 4651

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Han-jiang Lai

http://orcid.org/0000-0003-2845-6002

Jun-jie Zheng

http://orcid.org/0000-0001-9679-4914

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Journal of Zhejiang University SCIENCE A 2016 Vol.17 No.10 P.803-817

http://doi.org/10.1631/jzus.A1500302


Visualization of the formation and features of soil arching within a piled embankment by discrete element method simulation


Author(s):  Han-jiang Lai, Jun-jie Zheng, Rong-jun Zhang, Ming-juan Cui

Affiliation(s):  Institute of Geotechnical and Underground Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Corresponding email(s):   zhengjj@hust.edu.cn

Key Words:  Piled embankment, Numerical simulation, Discrete element method (DEM), Soil arching, Formation, Features


Han-jiang Lai, Jun-jie Zheng, Rong-jun Zhang, Ming-juan Cui. Visualization of the formation and features of soil arching within a piled embankment by discrete element method simulation[J]. Journal of Zhejiang University Science A, 2016, 17(10): 803-817.

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Abstract: 
piled embankments are widely used in highway and railway engineering due to their economy and efficiency in overcoming several issues encountered in constructing embankments over weak soils. soil arching, caused by the pile-subsoil relative displacement (Δs), plays an important role in reducing the embankment load falling on weak soil, however, the fundamental characteristics (e.g., formation and features) of soil arching remain poorly understood. In this study, a series of discrete element method (DEM) modellings are performed to study the formation and features of soil arching with the variation of Δs in piled embankments with or without geosynthetic reinforcement. Firstly, calibration for the modelling parameters is carried out by comparing the DEM results with the experimental data obtained from the existing literature. Secondly, the analysis of the macro- and micro-behaviours is performed in detail. Finally, a parametric study is conducted in an effort to identify the influences of three key factors on soil arching: the friction coefficient of the embankment fill (f), the embankment height (h), and the pile clear spacing (sa). Numerical results indicate that Δs is a key factor governing the formation and features of soil arching in embankments. To be specific, soil arching gradually evolves from two inclined shear planes at a small Δs to a hemispherical arch at a relatively large Δs. Then, with a continuous increase in Δs, the soil arching height gradually increases and finally approaches a constant value of 0.8(sa) (i.e., the maximum soil arching height). For a given case, the higher the soil arching height, the greater the degree of soil arching effect. The parametric study shows that the friction coefficient of the embankment fill has a negligible influence on the formation and features of soil arching. However, embankment height is a key factor governing the formation and features of soil arching. In addition, pile clear spacing has a significant effect on the formation of soil arching, but not on its features.

This is an interesting numerical study to further explore the mechanisms of soil arching in piled embankments. The findings from this study are valuable to current knowledge in this application.

桩承式路堤中土拱结构的形成与形态特征离散元数值分析

目的:旨在从宏细观角度探究桩承式路堤中土拱结构的形态特征及其演化规律。
创新点:1. 基于接触力链网络的细观统计与分析并结合土拱结构的特点,对路堤中的接触力链进行划分;2. 从宏细观角度,揭示路堤中土拱结构的形态特征,并研究土拱结构随桩土相对位移增加的演化规律。
方法:1. 采用傅里叶级数近似法对接触力链组构各向异性进行统计与划分;2. 基于路堤填料位移、接触力分布以及组构各向异性主方向等的分布及变化规律,从宏细观角度对土拱结构的形态及其演化规律进行综合分析。
结论:1. 土拱结构是由路堤中大于1.5倍接触力均值的强力链构成,而弱力链则主要起支撑作用。2. 土拱结构随桩土相对位移的增加而历经倾斜剪切面→半圆形拱→悬链线形拱的演化规律,土拱结构的最大高度约为0.8倍桩净间距。3. 路堤填料内摩擦角对土拱结构的形态及演化规律几乎无影响;路堤填筑高度对土拱结构形态则有显著影响;桩净间距对土拱结构的演化有一定影响,但是对其最终形态特征则几乎无影响。

关键词:桩承式路堤;数值模拟;离散元法;土拱结构;形成;形态特征

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Reference

[1]Bathurst, R.J., Rothenburg, L., 1990. Observations on stress-force-fabric relationships in idealized granular materials. Mechanics of Materials, 9(1):65-80.

[2]Benmebarek, S., Berrabah, F., Benmebarek, N., 2015. Effect of geosynthetic reinforced embankment on locally weak zones by numerical approach. Computers and Geotechnics, 65:115-125.

[3]Bhandari, A., Han, J., 2010. Investigation of geotextile-soil interaction under a cyclic vertical load using the discrete element method. Geotextiles and Geomembranes, 28(1):33-34.

[4]Bolton, M.D., 1986. The strength and dilatancy of sands. Géotechnique, 36(1):65-78.

[5]Briançon, L., Simon, B., 2012. Performance of pile-supported embankment over soft soil: full-scale experiment. Journal of Geotechnical and Geoenvironmental Engineering, 138(4):551-561.

[6]Carlson, B.O., 1987. Reinforced Soil, Principles for Calculation. Terratema AB, Linköping, Sweden (in Swedish).

[7]Chen, R.P., Xu, Z.Z., Chen, Y.M., et al., 2010. Field tests on pile-supported embankment over soft ground. Journal of Geotechnical and Geoenvironmental Engineering, 136(6):777-785.

[8]Chen, R.P., Zhao, X., Wang, Z.Z., et al., 2013. Experimental study on dynamic load magnification factor for ballastless track-subgrade of high-speed railway. Journal of Rock Mechanics and Geotechnical Engineering, 5(4):306-311.

[9]Chen, R.P., Chen, J.M., Wang, H.L., et al., 2014. Recent research on the track-subgrade of high-speed railways. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 15(12):1034-1038.

[10]Chen, R.P., Wang, Y.W., Ye, X.W., et al., 2016. Tensile force of geogrids embedded in pile-supported reinforced embankment: a full-scale experimental study. Geotextiles and Geomembranes, 44(2):157-169.

[11]Chen, Y.M., Cao, W.P., Chen, R.P., 2008. An experimental investigation of soil arching within basal reinforced and unreinforced piled embankments. Geotextiles and Geomembranes, 26(2):164-174.

[12]Gabr, M., Han, J., 2005. Geosynthetic reinforcement for soft foundations: US perspectives. International Perspectives on Soil Reinforcement Applications, Austin, USA, p.1-17.

[13]Guido, V.A., Kneuppel, J.D., Sweeny, M.A., 1987. Plate loading tests on geogrid-reinforced earth slabs. Proceedings of the Geosynthetics, New Orleans, USA, p.216-225.

[14]Han, J., Gabr, M.A., 2002. A numerical study of load transfer mechanisms in geosynthetic reinforced and pile supported embankments over soft soil. Journal of Geotechnical and Geoenvironmental Engineering, 128(1):44-53.

[15]Han, J., Bhandari, A., Wang, F., 2012. DEM analysis of stresses and deformations of geogrid-reinforced embankments over piles. International Journal of Geomechanics, 12(4):340-350.

[16]Hewlett, W.J., Randolph, M.F., 1988. Analysis of piled embankment. Ground Engineering, 21(3):12-18.

[17]Itasca, 2008. Particle Flow Code in Two Dimensions, Version 4.0. Itasca Consulting Group, Inc., Minnesot, USA.

[18]Jenck, O., Dias, D., Kastner, R., 2007. Two-dimensional physical and numerical modeling of a pile-supported earth platform over soft soil. Journal of Geotechnical and Geoenvironmental Engineering, 133(3):295-305.

[19]Jenck, O., Dias, D., Kastner, R., 2009. Discrete element modelling of a granular platform supported by piles in soft soil –validation on a small scale model test and comparison to a numerical analysis in a continuum. Computers and Geotechnics, 36(6):917-927.

[20]Kempfert, H.G., Stadel, M., Zaeske, D., 1997. Berechnung von geokunstst off between trags chichten über pfahlelementen. Bautechnik, 74:818-825 (in German).

[21]Lai, H.J., Zheng, J.J., Zhang, J., et al., 2014. DEM analysis of “soil”-arching within geogrid-reinforced and unreinforced pile-supported embankments. Computers and Geotechnics, 61:13-23.

[22]Ling, X.Z., Wang, L.N., Zhang, F., et al., 2010. Field experiment on train-induced embankment vibration responses in seasonally-frozen regions of Daqing, China. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 11(8):596-605.

[23]Liu, S.Y., Du, Y.J., Yi, Y.L., et al., 2012. Field investigations on performance of T-shaped deep mixed soil cement column-supported embankments over soft ground. Journal of Geotechnical and Geoenvironmental Engineering, 138(6):718-727.

[24]Lu, W.H., Miao, L.C., 2015. A simplified 2-D evaluation method of the arching effect for geosynthetic-reinforced and pile-supported embankments. Computers and Geotechnics, 65:97-103.

[25]MOT (Ministry of Transport of the People’s Republic of China), 1999. Test Methods of Geosynthetics for Highway Engineering, JTJ/T 060-98. China Communications Press, Beijing, China (in Chinese).

[26]Rothenburg, L., Bathurst, R.J., 1989. Analytical study of induced anisotropy in idealized granular materials. Géotechnique, 39(4):601-614.

[27]Rui, R., van Tol, F., Xia, X.L., et al., 2016a. Evolution of soil arching; 2D DEM simulations. Computers and Geotechnics, 73:199-209.

[28]Rui, R., van Tol, A.F., Xia, Y.Y., et al., 2016b. Investigation of soil-arching development in dense sand by 2D model tests. Geotechnical Testing Journal, 39(3):415-430.

[29]Terzaghi, K., 1943. Theoretical Soil Mechanics. Wiley, New York, USA.

[30]van Eekelen, S.J.M., Bezuijen, A., Lodder, H.J., et al., 2012a. Model experiments on piled embankments. Part I. Geotextiles and Geomembranes, 32:69-81.

[31]van Eekelen, S.J.M., Bezuijen, A., Lodder, H.J., et al., 2012b. Model experiments on piled embankments. Part II. Geotextiles and Geomembranes, 32:82-94.

[32]van Eekelen, S.J.M., Bezuijen, A., van Tol, A.F., 2013. An analytical model for arching in piled embankments. Geotextiles and Geomembranes, 39:78-102.

[33]van Eekelen, S.J.M., Bezuijen, A., van Tol, A.F., 2015. Validation of analytical models for the design of basal reinforced piled embankments. Geotextiles and Geomembranes, 43(1):56-81.

[34]Wang, C., Xu, Y., Dong, P., 2014. Working characteristics of concrete-cored deep cement mixing piles under embankments. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 15(6):419-431.

[35]Wang, Z.J., Jacobs, F., Ziegler, M., 2014. Visualization of load transfer behaviour between geogrid and sand using PFC2D. Geotextiles and Geomembranes, 42(2):83-93.

[36]Wang, Z.J., Jacobs, F., Ziegler, M., 2016. Experimental and DEM investigation of geogrid–soil interaction under pullout loads. Geotextiles and Geomembranes, 44(3):230-246.

[37]Zaeske, D., Kempfert, H., 2002. Calculation and behaviour of unreinforced and reinforced bearing layers over point- or lineshaped bearing elements. Bauingenieur, 77(2):01195104 (in German).

[38]Zhang, J., Zheng, J.J., Chen, B.G., et al., 2013. Coupled mechanical and hydraulic modelling of a geosynthetic-reinforced and pile-supported embankment. Computers and Geotechnics, 52:28-37.

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