竖向荷载作用下含接头埋地PE管道-基土相互作用模型试验研究

Model Experiment on the Interaction Between the Buried PE Pipeline with Joint and Foundation Soil Under the Vertical Load

摘要

竖向荷载作为常见却容易被忽视的危险因素会引起埋地PE管道失效。基于自主研发的管道试验平台，开展了含接头埋地PE管道-基土相互作用的缩尺模型试验，探究了竖向荷载作用下含接头埋地PE管道力学响应以及管-土耦合作用机制。试验结果表明，竖向荷载作用下埋地PE管道系统的破坏易始于接头部位，首先从接头焊缝处萌生微裂纹，随后在外力持续作用下裂纹沿焊缝定向扩展。荷载作用下管道发生的水平位移加剧管道变形，埋地PE管道在地面竖向荷载作用下沿轴线整体出现拉伸变形，管道纵向应变主要表现为管顶拉应变、管底压应变。由于土壤对荷载的消散作用，增加管道埋深可以有效减小地表竖向荷载对管道的破坏作用。

Abstract

Vertical load, as a common yet easily overlooked hazard factor, can cause the failure of buried PE pipeline. Based on the independently developed pipeline-soil interaction test platform, this paper carried out a model test of the interaction between the foundation soil and buried PE pipe with joint, and explored the mechanical response of buried PE pipeline with joints under vertical loads and the mechanism of pipe-soil coupling processes. The results showed that the failure of buried PE pipeline systems under vertical loads was prone to start at the joint. Firstly, micro-cracks emerged from the weld seam of the joint. Then, under the continuous action of vertical load, the cracks expanded along the weld seam. Additionally, under the action of vertical load, the horizontal displacement of the pipeline intensified the deformation of the pipeline. Buried PE pipelines, under the action of vertical load, underwent overall tensile deformation along the axis. The longitudinal strain of the pipeline was mainly manifested as tensile strain at the top of the pipeline, and the compressive strain at the bottom of the pipeline. Due to the dissipation effect of soil on vertical load, increasing the burial depth of pipelines can effectively reduce the destructive effect of vertical loads on pipelines.

关键词

含接头管道 / 竖向荷载 / 管道变形 / 失效 / 模型试验

Key words

pipeline with joint / vertical load / pipe deformation / failure / model test

参考文献

[1] YAN Yan, ZHOU Jiaojiao, XIE Cheng, et al. Quantitative estimation of pipeline slope disaster risk in China[J]. International Journal of Disaster Risk Science, 2023, 14(2): 298-312. doi: 10.1007/s13753-023-00462-5

[2] 梁平， 周泽山， 吴晓霞， 等. 崩塌落石作用下埋地管道力学响应分析[J]. 非常规油气， 2024， 11（2）： 118-125. doi: 10.19901/j.fcgyq.2024.02.14

[3] LIANG Ping, ZHOU Zeshan, WU Xiaoxia, et al. Mechanical response analysis of buried pipeline under collapse and rockfall[J]. Unconventional Oil & Gas, 2024, 11(2): 118-125. doi: 10.19901/j.fcgyq.2024.02.14

[4] 李豪杰， 韩高孝， 王旭. 交通荷载作用下埋地管道纵向受力计算[J]. 地下空间与工程学报， 2022， 18（5）： 1511-1520.

[5] LI Haojie, HAN Gaoxiao, WANG Xu. Calculation of longitudinal stress of buried pipeline under traffic load[J]. Chinese Journal of Underground Space and Engineering, 2022, 18(5): 1511-1520.

[6] 葛华， 倪文涛， 汤明高， 等. 滑坡作用下埋地油气管道的力学分析方法[J]. 西安石油大学学报（自然科学版）， 2024， 39（5）： 127-133. doi： 10.3969/j.issn.1673-064X.2024.05.016

[7] GE Hua, NI Wentao, TANG Minggao, et al. Mechanical analysis method for buried oil and gas pipelines under landslide action[J]. Journal of Xi′an Shiyou University (Natural Science), 2024, 39(5): 127-133. doi: 10.3969/j.issn.1673-064X.2024.05.016

[8] 彭星煜， 陈桂芳， 陈磊， 等. 建筑物占压作用下输气管道的安全可靠性评估[J]. 油气储运， 2022， 41（5）： 549-556. doi: 10.6047/j.issn.1000-8241.2022.05.007

[9] PENG Xingyu, CHEN Guifang, CHEN Lei, et al. Safety and reliability assessment of gas pipelines under building occupation[J]. Oil & Gas Storage and Transportation, 2022, 41(5): 549-556. doi: 10.6047/j.issn.1000-8241.2022.05.007

[10] CHAUDHURI C H, CHOUDHURY D . Buried pipeline subjected to seismic landslide: A simplified analytical solution[J]. Soil Dynamics and Earthquake Engineering, 2020, 134: 106155. doi: 10.1016/j.soildyn.2020.106155

[11] 练章富， 李风雷. 滑坡带埋地管道力学强度分析[J]. 西南石油大学学报（自然科学版）， 2014， 36（2）： 165-170. doi： 10.11885/j.issn.1674-5086.2013.11.18.02

[12] LIAN Zhangfu, LI Fenglei. Analysis of mechanical strength of buried pipelines in landslide areas[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2014, 36(2): 165-170. doi: 10.11885/j.issn.1674-5086.2013.11.18.02

[13] 张杰， 陈小华， 鲁鑫， 等. 逆断层作用下埋地管道局部屈曲行为研究[J]. 西南石油大学学报（自然科学版）， 2019， 41（3）： 169-176. doi： 10.11885/j.issn.1674-5086.2018.06.20.02

[14] ZHANG Jie, CHEN Xiaohua, LU Xin, et al. Study on the local buckling behavior of buried pipelines under reverse faults[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2019, 41(3): 169-176. doi: 10.11885/j.issn.1674-5086.2018.06.20.02

[15] 王凯， 李清平， 宫敬， 等. 半埋热油管道传热研究[J]. 西南石油大学学报（自然科学版）， 2012， 34（2）： 173-179. doi： 10.3863/j.issn.1674-5086.2012.02.025

[16] WANG Kai, LI Qingping, GONG Jing, et al. Study on heat transfer of partially buried hot oil pipeline[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2012, 34(2): 173-179. doi: 10.3863/j.issn.1674-5086.2012.02.025

[17] ZENG Xi, DONG Feifei, XIE Xiangdong, et al. A new analytical method of strain and deformation of pipeline under fault movement[J]. International Journal of Pressure Vessels and Piping, 2019, 172: 199-211. doi: 10.1016/j.ijpvp.2019.03.005

[18] 李长俊， 马树锋， 季楚凌， 等. 地面堆载对埋地管道的安全影响分析[J]. 中国安全生产科学技术， 2015， 11（11）： 23-28. doi： 10.11731/j.issn.1673-193x.2015.11.004

[19] LI Changjun, MA Shufeng, JI Chuling, et al. Study on influence to safety of buried pipelines caused by ground loads[J]. Journal of Safety Science and Technology, 2015, 11(11): 23-28. doi: 10.11731/j.issn.1673-193x.2015.11.004

[20] 张鹏， 姚正学. 交通荷载作用下埋地含缺陷PE管道力学行为研究[J]. 中国安全生产科学技术， 2020， 16（1）： 25-31. doi： 10.11731/j.issn.1673-193x.2020.01.004

[21] ZHANG Peng, YAO Zhengxue. Study on mechanical behavior of buried PE pipeline with defect under traffic load[J]. Journal of Safety Science and Technology, 2020, 16(1): 25-31. doi: 10.11731/j.issn.1673-193x.2020.01.004

[22] 梁莉， 芶文锦， 田大浪， 等. 交通荷载作用下埋地管道的三维力学性状分析[J]. 西安建筑科技大学学报（自然科学版）， 2020， 52（1）： 72-78. doi： 10.15986/j.1006-7930.2020.01.010

[23] LIANG Li, GOU Wenjin, TIAN Dalang, et al. Analysis on 3D mechanical characteristics of buried pipeline under traffic loading[J]. Journal of Xi′an University of Architecture & Technology, 2020, 52(1): 72-78. doi: 10.15986/j.1006-7930.2020.01.010

[24] 蒋宏业， 兰旭彬， 王金荣， 等. 滑坡下成品油管道力学响应研究[J]. 西南石油大学学报（自然科学版）， 2021， 43（6）： 71-83. doi： 10.11885/j.issn.1674-5086.2020.12.04.02

[25] JIANG Hongye, LAN Xubin, WANG Jinrong, et al. A study on mechanical response of product oil pipeline under landslide[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2021, 43(6): 71-83. doi: 10.11885/j.issn.1674-5086.2020.12.04.02

[26] JAMIN P, KYRIAKOS T, OHSUNG K, et al. Experimental method for evaluation of soil-pipe interaction subjected to lateral or vertical cyclic load[J]. Earthquake Engineering & Structural Dynamics, 2022, 51(3): 552-568. doi: 10.1002/eqe.3579

[27] ZHANG Jie, LIANG Zheng, HAN Chuanjun . Effect of surrounding soil on stress-strain response of buried pipelines under ground loads[J]. The IES Journal Part A: Civil & Structural Engineering, 2015, 8(3): 197-203. doi: 10.1080/19373260.2015.1050774

[28] 张宏涛， 刘国登， 宋志祥， 等. 交通荷载作用下埋地管道力学性能数值模拟分析[J]. 北方工业大学学报， 2024， 36（6）： 30-40. doi： 10.3969/j.issn.1001-5477.2024.06.004

[29] ZHANG Hongtao, LIU Guodeng, SONG Zhixiang, et al. Numerical simulation analysis of mechanical properties of buried pipelines under traffic loads[J]. Journal of North China University of Technology, 2024, 36(6): 30-40. doi: 10.3969/j.issn.1001-5477.2024.06.004

[30] 徐青永， 郭华超， 王志刚. 接触载荷作用下聚乙烯燃气管道的有限元分析[J]. 特种设备安全技术， 2023（1）： 23-25. doi: 10.3969/j.issn.1674-1390.2023.01.009

[31] XU Qingyong, GUO Huachao, WANG Zhigang. Finite element analysis of polyethylene gas pipeline under contact load[J]. Special Equipment Safety Technology, 2023(1): 23-25. doi: 10.3969/j.issn.1674-1390.2023.01.009

[32] MA Qiang, KU Zhun, XIAO HengLin . Model tests of earth pressure on buried rigid pipes and flexible pipes underneath expanded polystyrene (EPS)[J]. Advances in Civil Engineering, 2019(1): 9156129. doi: 10.1155/2019/9156129

[33] 王建华， 杨召焕. 轴向荷载作用下管与软土相互作用模型试验[J]. 岩土力学， 2015， 36（S1）： 61-65. doi： 10.16285/j.rsm.2015.S1.011

[34] WANG Jianghua, YANG Zhaohuan. Model tests on interaction between pipeline and soft clay under axial loading[J]. Rock and Soil Mechanics, 2015, 36(S1): 61-65. doi: 10.16285/j.rsm.2015.S1.011

[35] 张玉， 梁昊， 林亮， 等. 不同沉降方式下埋地管道力学响应试验研究[J]. 岩土力学， 2023， 44（6）： 1645-1656. doi： 10.16285/j.rsm.2022.0983

[36] ZHANG Yu, LIANG Hao, LIN Liang, et al. Experimental study on the mechanical response of buried pipelines under different subsidence patterns[J]. Rock and Soil Mechanics, 2023, 44(6): 1645-1656. doi: 10.16285/j.rsm.2022.0983

[37] 王志杰， 成彪， 杨广庆， 等. 竖向荷载作用下加筋埋地管道力学与变形行为细观分析[J]. 西南交通大学学报， 2025， 60（1）： 119-127. doi： 10.3969/j.issn.0258-2724.20230046

[38] WANG Zhijie, CHENG Biao, YANG Guangqing, et al. Mesoscopic study on mechanical and deformation behaviors of reinforced buried pipelines under vertical loads[J]. Journal of Southwest Jiaotong University, 2025, 60(1): 119-127. doi: 10.3969/j.issn.0258-2724.20230046

[39] 周恩全， 宗之鑫， 王琼， 等. 橡胶粉土轻质混合土中管道动力响应特性[J]. 岩土力学， 2020， 41（4）： 1388-1395. doi： 10.16285/j.rsm.2019.0657

[40] ZHOU Enquan, ZONG Zhixin, WANG Qiong, et al. Dynamic characteristics of pipe buried in rubber-silt lightweight mixtures[J]. Rock and Soil Mechanics, 2020, 41(4): 1388-1395. doi: 10.16285/j.rsm.2019.0657

[41] 张虎， 邵磊， 余成， 等. 冲击荷载对埋地管道影响的试验与数值模拟研究[J]. 地震工程与工程振动， 2022， 42（3）： 243-252. doi： 10.13197/j.eeed.2022.0326

[42] ZHANG Hu, SHAO Lei, YU Cheng, et al. Experimental and numerical simulation study of impact loading on buried pipeline[J]. Earthquake Engineering and Engineering Vibration, 2022, 42(3): 243-252. doi: 10.13197/j.eeed.2022.0326

[43] 马彦军， 吴红刚， 秦昌乐， 等. 山区斜坡中微型桩及油气管道变形机制模型试验研究[J]. 岩石力学与工程学报， 2024， 43（3）： 728-741. doi: 10.13722/j.cnki.jrme.2023.0338

[44] MA Yanjun, WU Honggang, QIN Changle, et al. Model experimental study on deformation mechanism of micro piles and oil-gas pipelines in mountain slopes[J]. Chinese Journal of Rock Mechanics and Engineering, 2024, 43(3): 728-741. doi: 10.13722/j.cnki.jrme.2023.0338