In the design of buried steel pipes, the influences of surrounding soil and trench on the steel pipes need to be taken into consideration, which are researched inadequately. The sensitivities of such parameters inclusive of the deformation modulus E1 of backfill, the deformation modulus E2 of sand bedding, the bedding angle θ, the trench bottom width B, and the inclination angle α of trench sidewalls to test indices (maximum vertical deformation of pipe, circumferential bending stresses of pipe top, springline, and bottom) were examined via an orthogonal test method. Results suggest that E1, E2, and α are highly sensitive to the test indices, while B bears low sensitivity to the test indices, and θ has the lowest sensitivity. The high soil deformation modulus and narrow excavation trench are beneficial to the structure of buried steel pipes, while the inclination angle of trench sidewalls has a complex influence on pipes and needs to be analyzed in line with specific situation. The research findings provide references for the parameter design of buried steel pipes.
Key words
buried steel pipes /
sensitivity analysis for parameters /
orthogonal test method /
finite element method /
structure design
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References
[1] WATKINS R K.Non-elastic Behavior of Buried Pipes[C]//Proceedings of Pipeline Division Specialty Conference 2001. San Diego,California,United States. June 15-18,2001.
[2] 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.
[3] 李炎隆, 李守义,丁占峰, 等. 基于正交试验法的邓肯-张E-B模型参数敏感性分析研究[J]. 水利学报, 2013,44(7):873-879.
[4] KAWABATA T, MOHRI Y, ODA T, et al. Field Measurement and Numerical Analysis for Buried Large Diameter Steel Pipes[C]//Proceedings of International Pipelines Conference 2008. Atlanta, Georgia, United States, July 22-27, 2008: 1-10.
[5] MASADA T. Modified Iowa Formula for Vertical Deflection of Buried Flexible Pipe[J]. Journal of Transportation Engineering, 2000, 126(5): 440-446.
[6] 周正峰, 苗禄伟, 梁 斌. 输油管道土压力影响因素有限元分析[J]. 中外公路, 2014,34(5):48-53.
[7] DEZFOOLI M S, ABOLMAALI A, RAZAVI M. Coupled Nonlinear Finite-Element Analysis of Soil-Steel Pipe Structure Interaction[J]. International Journal of Geomechanics, 2015,15(1): 4014032.
[8] 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.
[9] CARD R J, KEIL B. Steel Pipe Installation in Poor Soil Conditions: A Determination of Optimum Trench Width[C]//Proceedings of Pipelines 2017.Phoenix,Arizona,August 6-9,2017.
[10]茆诗松, 王静龙, 史定华, 等.统计手册[K]. 北京: 科学出版社, 2003.
[11]张德永, 王玉洲, 张志豪, 等. 基于正交设计和粗糙集理论的地基极限承载力影响因素分析[J]. 长江科学院院报, 2015,32(9):118-122.
[12]王贤昆, 庞建勇, 王 强. 复合水泥土无侧限抗压强度正交试验研究[J]. 长江科学院院报, 2015,32(12):72-75.
[13]刘金龙, 栾茂田, 许成顺, 等. Drucker-Prager准则参数特性分析[J]. 岩石力学与工程学报, 2006, 25(增刊2):4009-4015.
[14]苏 凯, 张 伟, 伍鹤皋, 等. 考虑摩擦接触特性的钢衬钢筋混凝土管道承载机理研究[J]. 水利学报, 2016,47(8):1070-1078.
[15]傅 丹, 伍鹤皋, 胡 蕾. 水电站充水保压蜗壳间隙闭合及接触传力特性[J]. 华中科技大学学报(自然科学版), 2014,42(7):27-32.
[16]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.
[17]GB 50268—2008,给水排水管道工程施工及验收规范[S].北京:中国建筑工业出版社,2008.
[18]American Society of Civil Engineers. Buried Flexible Steel Pipe-Design and Structural Analysis[K]. Virginia, USA: American Society of Civil Engineers, 2009.
[19]李云雁, 胡传荣. 试验设计与数据处理[M]. 2版. 北京:化学工业出版社, 2008.
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