Numerical Simulation of Piping Mechanism under Unsteady Flow

Abstract:

Used the numerical method, considered the rising speed of head of seepage deformation, with the aid of the method of particle flow in micro layer to study the occurrence and development of the law of seepage failure. Numerical simulation was designed based on the study of the theory. Conducting piping tests of the soil samples by controlling water head. The results show that, the effects of loaded once on the orifice area was large, and also the most insecure. And the test result verifies the correctness of theoretical analysis. The results are valuable to further probing into the piping mechanism in sandy soils.

• Periodical: Applied Mechanics and Materials (Volumes 641-642)
• Pages: 309-315
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.641-642.309
• Online since: September 2014
• Authors: Xiao Dong Ni*, Shuai Long Zhao, Yuan Wang
• Keywords: Coefficient of Permeability, Damage Water Head, DEM, Pipe, Unsteady Flow

References

[1] Xiaonan Gong. Soil mechanics[M]. Beijing: China Architecture Industry Press, 2005. (in Chinese).

[2] RICHARDS K S, REDDY K R. True triaxial piping test apparatus for evaluation of piping potential in earth structures[J]. Geotechnical Testing Journal, 2010, 33(1): 1 - 13.

DOI: 10.1520/gtj102246

[3] Sellmeijer J. B. Piping due to flow towards ditches and holes[A]. Proceedings of Euromech [C]. 143, Delft, 1981, 69 - 72.

[4] Changxi MAO, Xiangbao DUAN, Jinbang CAI. Experimental study on piping development control by means of suspended cut-off wall[J]. Journal of Hydraulic Engineering, 2005, 36(1): 42 - 50. (in Chinese).

[5] STERPI D. Effects of the erosion and transport of fine particles due to seepage flow[J]. International journal of Geomechanics, 2003, 3(1): 111 - 122.

DOI: 10.1061/(asce)1532-3641(2003)3:1(111)

[6] Usama EI Shamy, and Firat Aydin. Multiscale modeling of flood-induced piping in river levees. Journal of Geotechnical and Geoenvironmental Engineering, 2008, 134(9): 1385-1398.

DOI: 10.1061/(asce)1090-0241(2008)134:9(1385)

[7] Xiaodong NI, Yuan WANG, Fei WANG. Study on Piping by Sand-bank Model And simulation by PFC3D [J]. Journal of Sichuan University(Engineering Science Edition), 2009, 41(8): 51 - 57. (in Chinese).

[8] Changxi MAO, Xiangbao DUAN, Jinbang CAI, et al. Piping experimental study and theoretical analysis of unsteady seepage flow during flood peak [J]. Journal of Hydraulic Engineering. 2005, 36(9): 1105-1120. (in Chinese).

[9] Yuan WANG, Qingqing YAN. PRIMARY RESEARCH OF INFLUENCE OF UNSTEADY SEEPAGE PROCESSES ON HYDRAULIC FRACTURING IN ROCK MASS [J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(10): 2016-2021. (in Chinese).

[10] Jian ZHANG, Jianfeng ZHAI, Xianmei WANG, et al. Analysis of piping field distributions based on unsteady spherical well flow theory [J], HYDRO-SCIENCE AND ENGINEERING, 2014, (1): 49-55. (in Chinese).

[11] Yifeng CHEN, Ran HU, Chuangbing ZHOU, et al. A new parabolic variational inequality formulation of signorini's condition for non-steady seepage problems with complex seepage control systems[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 2010, DOI: 10. 1002/nag. 944. (in Chinese).

DOI: 10.1002/nag.944

[12] Tongkang Tao. Experiment Study and Computation of Unsteady Seepage in Embankment Dams[J], 1981, 3(1): 81-93. (in Chinese).

[13] Peiwen ZHANG, Defu LIU, Dahai HUANG, et al. Saturated-unsaturated unsteady seepage flow numerical simulation[J]. Rock and Soil Mechanics, 2003, 24(6): 927–930. (in Chinese).

[14] Houxiang LIU, Ning LI, Xue LIAO, et al. Unsteady seepage analysis of tailing dams considering coupling of stress and seepage fields[J] . Chinese Journal of Rock Mechanics and Engineering, 2004, 23(17) : 2870-2875. (in Chinese).

[15] Dean, E.T.R. Discussion on Scale-modeling of fluid flow in geotechnical centrifuges[J]. Soils and Foundations, 2001, 41(4): 108 - 110.

[16] N.I. Thusyanthan. Scaling of Seepage Flow Velocity in Centrifuge Models[J]. CUED/D -SOILS / TR326, 2003, 1 - 13.