Calculation of seepage force around buried pipelines under nonlinear waves
FU Chang-jing1, 2, LI Guo-ying1, ZHAO Tian-long1
1. Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, Nanjing 210024, China; 2. College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China
Abstract：Due to the effect caused by nonlinear shallow waves, the nonlinear wave load has a great influence on the shallow buried pipelines. The wave pressure on seabed surface changes periodically with the propagation of waves, and it will further pass to the sea-bed, so the seepage force around pipelines will change over the propagation of waves. In order to ensure their stability, we need to study the seepage pressure around the pipelines. Based on the Biot consolidation theory and the first-order solitary wave theory, the distribution of seepage force caused by nonlinear waves around the buried pipelines in shallow water is studied, and the relevant analytic solution is derived and compared with the existing test and the numerical results. The calculated results show that the seepage force around the buried pipelines exhibits a sinusoidal distribution under the effect of solitary waves, and they agree well with the test ones. Since the seepage forces based on different wave theories have great differences, the corresponding wave theory should be chosen according to the sea conditions in practical engineering.
付长静, 李国英, 赵天龙. 非线性波浪作用下埋置管道周围土体渗流压力计算[J]. 岩土工程学报, 2015, 37(5): 932-936.
FU Chang-jing, LI Guo-ying, ZHAO Tian-long. Calculation of seepage force around buried pipelines under nonlinear waves. Chinese J. Geot. Eng., 2015, 37(5): 932-936.
[1] LAMBRAKOS K F, CHAO J C, BECKMANN H, et al. Wake model of hydrodynamic forces on pipelines[J]. Ocean Engineering, 1987, 14(2): 117-136. [2] MCDOUGAL W G, DAVIDSON S H, MONKMEYER P L, et al. Wave-induced forces on buried pipelines[J]. Journal of Waterway, Port, Coastal and Ocean Engineering, 1979, 114(2): 220-236. [3] SPIEREBURG S E J. Wave-induced pore pressure around submarine pipelines[J]. Coastal Engineering, 1986, 10(1): 33-48. [4] SUDHAN C M, SUNDAR V, RAO S N. Wave induced forces around buried pipeline[J]. Ocean Engineering. 2002, 29: 533-544. [5] 栾茂田, 曲鹏, 杨庆, 等. 波浪引起的海底管线周围海床动力响应分析[J]. 岩石力学与工程学报, 2008, 27(4): 789-795. (LUAN Mao-tian, QU Peng, YANG Qing, et al. Wave- induced dynamic response of seabed around submarine pipeline[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(4): 789-795.(in Chinese)) [6] 栾茂田, 曲鹏, 杨庆, 等. 非线性波浪作用下海底管线-海床动力响应分析[J].岩土力学, 2007, 28(增刊1): 709-714. (LUAN Mao-tian, QU Peng, YANG Qing, et al. Nonlinear wave-induced transient response of pipeline-seabed interaction[J]. Rock and Soil Mechanics, 2007, 28(S1): 709-714. (in Chinese)) [7] .GAO F P, JENG D S, SEKIGUCHI H. Numerical study on the interaction between non-linear wave, buried pipeline and non-homogenous porous seabed[J]. Computers and Geotechnics, 2003, 30: 535-547. [8] LE MEHAUTE. An Introduction to hydrodynamics and water waves[M]. New York: Springer-Verlag, 1976. [9] 孙昭晨, 邱大洪. 浅水区海底埋设管线上非线性波浪力[J].大连理工大学学报, 2000(增刊1): 95-98. (SUN Zhao-chen, QIU Da-hong. Nonlinear wave force on a buried pipeline in shallow water[J]. Journal of Dalian University of Technology, 2000(S1): 95-98. (in Chinese)) [10] 宋帅, 尤云祥, 魏岗. 孤立波与直墙式多孔介质结构相互作用数值分析[J]. 海洋工程, 2007, 25(4): 7-14. (SONG Shuai, YOU Yun-xiang, WEI Gang. The interaction of the solitary wave with a vertically walled porous structure[J]. The Ocean Engineering, 2007, 25(4): 7-14. (in Chinese)) [11] LYNETT P J, LIU P L F , LOSADA I J, et al. Solitary wave interaction with porous breakwaters[J]. Journal of Waterway, Port, Coastal, and Ocean Engineering, 2000, 126(6): 313-321. [12] 李奇, 黄华, 詹杰民, 等. 孤立波引起的对固立墩柱底部的波浪渗流作用[J]. 热带海洋学报, 2013(5): 42-47. (LI Qi, HUANG Hua, ZHAN Jie-min. Solitary wave-induced seepage effects on the bottom of vertical cylinder resting on porous seabed[J]. Journal of Tropical Oceanography, 2013(5): 42-47. (in Chinese)) [13] XIAO H, HUANG W. Three-dimensional numerical modeling of solitary wave breaking and force on a cylinder pile in a coastal surf zone[J]. Journal of Engineering Mechanics. 2014: A4014001. [14] 钱家欢. 土工原理与计算[M]. 北京: 中国水利水电出版社, 1995. (QIAN Jia-huan. Geotechnical priuciple and calculation[M]. Beijing: China Water Power Press, 1995. (in Chinese)) [15] J 贝尔. 多孔介质流体动力学[M]. 北京: 中国建筑工业出版社, 1983. (BELL J. Dynamics of fluids in prousmedia[M]. Beijing: China Architecture and Building Press, 1983. (in Chinese)) [16] KOKKINOWRACHOS K. Hydrodynamic analysis of large offshore structure on porous elastic seabed[Z]. Tokyo: OMAE, 1985. [17] 邱大洪. 波浪渗流力学[M]. 北京: 国防工业出版社, 2006. (QIU Da-hong. Seepage mechanics of waves[M]. Beijing: National Defense of Industry, 2006. (in Chinese)) [18] 曲鹏. 波浪作用下海底管线及周围海床动力响应分析[D]. 大连: 大连理工大学, 2008. (QU Peng. Numerical analysis of dynamic response of submarine pipeline and seabed under wave loading[D]. Dalian: Dalian University of Technology, 2008. (in Chinese))
