It is crucial to ensure the structural safety of buried steel pipes (BSP) as they are increasingly utilized in major water diversion projects, as the lifeline of these projects.However, current BSP structural calculation methods lack the consideration of pipe’s self-weight. In view of this, we developed a calculation method considering the self-weight of pipes based on the Spangler model theory, and compared the results with those of traditional and finite element methods. Results demonstrate that the proposed calculation method merely integrates the pipe weight term into the existing calculation equations, rendering it straightforward and convenient. The inclusion of pipe weight moderately increases pipe deformation by up to 20%. For pipes with substantial diameters and shallow cover depths, the self-weight should be taken into consideration, whereas for pipes with diameter less than 1 m or depth exceeding 4 m, the self-weight of pipes can be neglected. The proposed calculation method aligns more closely with the finite element method regarding pipe deformation patterns, with generally higher calculation accuracy compared to traditional methods. Moreover, the proposed calculation method is applicable to other typical buried flexible pipes.
Key words
buried steel pipe /
pipe weight /
Spangler model /
pipe deformation /
calculation method
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] 肖 俊, 李卓球, 陈建中. 基于斯潘格勒理论的埋地柔性管道有限元分析[J]. 华中科技大学学报(自然科学版), 2014, 42(1): 89-92. (XIAO Jun, LI Zhuo-qiu, CHEN Jian-zhong. Finite Element Analysis of Buried Flexible Pipeline Based on Spangler Theory[J]. Journal of Huazhong University of Science and Technology (Natural Science Edition), 2014, 42(1): 89-92.(in Chinese))
[2] SPANGLER M G. The Structural Design of Flexible Pipe Culverts[R]. Bulletin 153. Iowa, USA: Iowa Engineering Experiment Station Ames, 1941.
[3] WATKINS R K. Characteristics of the Modulus of Passive Resistance of Soil[D].Iowa, USA: Iowa State University, 1957.
[4] 邓道明, 李育光. 埋地柔性管道的应力和变形分析[J]. 油气储运, 1998, 17(6): 11-14, 57. (DENG Dao-ming, LI Yu-guang .Analysis on Stress and Distortion of Buried Flexible Pipeline[J]. Oil & Gas Storage and Transportation, 1998, 17(6): 11-14, 57.(in Chinese))
[5] KAWABATA T, LING H I, MOHRI Y, et al. Behavior of Buried Flexible Pipe under High Fills and Design Implications[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2006, 132(10): 1354-1359.
[6] TIAN Y, LIU H, JIANG X, et al. Analysis of Stress and Deformation of a Positive Buried Pipe Using the Improved Spangler Model[J]. Soils and Foundations, 2015, 55(3): 485-492.
[7] 于金弘,石长征,伍鹤皋,等.大直径埋地钢管管顶土压力及其设计模型研究[J].岩土工程学报,2022,44(3):514-522.(YU Jin-hong, SHI Chang-zheng, WU He-gao, et al. Soil Pressures at Top of Large-diameter Buried Steel Pipes and Their Design Model[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(3): 514-522.(in Chinese))
[8] 李卓球,岳红军. 玻璃钢管道与容器[M]. 北京: 科学出版社, 1990. (LI Zhuo-qiu, YUE Hong-jun. FRP Pipes and Containers[M]. Beijing: Science Press, 1990.(in Chinese))
[9] 伍鹤皋, 于金弘, 石长征, 等. 基于正交试验法的埋地钢管参数敏感性分析[J]. 长江科学院院报, 2021, 38(8): 97-103. (WU He-gao, YU Jin-hong, SHI Chang-zheng, et al. Sensitivity Analysis for Parameters of Buried Steel Pipes Based on Orthogonal Test Method[J]. Journal of Yangtze River Scientific Research Institute, 2021, 38(8): 97-103.(in Chinese))
[10]WHIDDEN W R. Buried Flexible Steel Pipe: Design and Structural Analysis[R].Reston, VA: American Society of Civil Engineers, 2009.
[11]李新慧. 天然气埋地管道沉降的有限元分析[J]. 岩土工程学报, 2013, 35(增刊1): 259-263. (LI Xin-hui. Finite Element Analysis of Natural Gas Buried Pipeline Settlement[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(Supp.1): 259-263.(in Chinese))
[12]周正峰, 凌建明, 梁 斌. 输油管道土压力分析[J]. 重庆交通大学学报(自然科学版), 2011, 30(4): 794-797. (ZHOU Zheng-feng, LING Jian-ming, LIANG Bin. Analysis of Earth Pressure on Oil Pipe[J]. Journal of Chongqing Jiaotong University (Natural Science), 2011, 30(4): 794-797.(in Chinese))
[13]CECS: 141—2002, 给水排水工程埋地钢管管道结构设计规程[S]. 北京:中国建筑工业出版社,2002. (CECS: 141—2002, Specification for Structural Design of Buried Steel Pipeline of Water Supply and Sewerage Engineering[S]. Beijing: China Architecture & Building Press, 2002. (in Chinese))
PDF(5065 KB)
