滑坡碎屑流作用下埋地管道轴向应变特性

兰州理工大学学报 ›› 2023, Vol. 49 ›› Issue (2): 70-75.

滑坡碎屑流作用下埋地管道轴向应变特性

王辉¹, 胡海涛², 谢越³, 麻宏强^*3,4

1.甘肃建投河西建设管理有限公司, 甘肃武威 733000;
2.甘肃建投科技研发有限公司, 甘肃兰州 730050;
3.华东交通大学土木建筑学院, 江西南昌 330013;
4.兰州理工大学土木工程学院, 甘肃兰州 730050

收稿日期:2021-12-16 出版日期:2023-04-28 发布日期:2023-05-05
通讯作者: 麻宏强(1984-),男,甘肃兰州人,副教授.Email:mhq2014@sina.com
基金资助:
十三五国家科技重大专项 (2016ZX05017-004)

Axial strain characteristics of buried pipeline under landslide debris flow

WANG Hui¹, HU Hai-tao², XIE Yue³, MA Hong-qiang^3,4

1. Gansu Construction Investment Hexi Construction Management Limited Company, Wuwei 733000, China;
2. Gansu Construction Investment Technology Research and Development Limited Company, Lanzhou 730050, China;
3. School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China;
4. School of Civil Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China

Received:2021-12-16 Online:2023-04-28 Published:2023-05-05

摘要/Abstract

摘要： 为了保证滑坡碎屑流灾害作用下管道的稳定运作,根据热-弹塑性理论,创建了滑坡碎屑纵向作用条件下埋地管道的应变分析模型,对不同滑坡碎屑流长度、宽度和厚度条件下埋地管道轴向应变分布特征进行研究.结果表明,滑坡碎屑流尺寸对管道轴向拉压应变的影响程度,从大到小依次为滑坡厚度、长度、宽度.通过分析径厚比、管壁减薄和管道埋深等结构参数对轴向拉伸应变的影响规律,发现管道轴向最大拉压应变随着坡度、埋土深度增加而明显减小;管道的壁厚减薄与管道轴向拉压应变呈正相关,管道埋深与之呈负相关;从管道结构参数对管道最大轴向拉压应变影响的影响程度来看,依次为管道埋深、管壁减薄、径厚比.适当增加滑坡碎屑流作用条件下的管道埋深可以减小滑坡碎屑流灾害作用风险.

关键词: 埋地管道应变分析模型, 轴向拉压应变分布规律, 轴向应变影响规律, 滑坡碎屑流灾害作用风险

Abstract: In order to ensure the stable operation of pipelines under landslide debris flow disasters, a strain analysis model for buried pipelines under the longitudinal action of landslide debris was established based on the thermal elastic-plastic theory. Meanwhile, the axial strain distribution characteristics were studied for buried pipelines under different lengths, widths and thicknesses of landslide debris flow. The results show that the influence degree of landslide debris flow size on the pipeline axial tensile and compressive strain is landslide thickness, length and width. By analyzing the influence of structural parameters such as diameter to thickness ratio, pipe wall thinning and pipe buried depth on axial tensile strain, it was found that the maximum axial tensile and compressive strain of the pipeline decreases significantly with the increase of slope and buried depth. The wall thickness reduction of the pipeline was positively correlated with the axial tensile and compressive strain of the pipeline, while the buried depth of the pipeline was negatively correlated with it. From the perspective of the influence of pipeline structural parameters on the maximum axial tensile and compressive strain of the pipeline, the order was pipeline buried depth, pipe wall thinning, and diameter thickness ratio. Properly increasing the buried depth of pipelines under the condition of landslide debris flow can reduce.

Key words: strain analysis model of buried pipeline;axial tension and compression strain distribution, influence law of axial strain, landslide debris flow hazard action risk

中图分类号:

TE64

王辉, 胡海涛, 谢越, 麻宏强. 滑坡碎屑流作用下埋地管道轴向应变特性[J]. 兰州理工大学学报, 2023, 49(2): 70-75.

WANG Hui, HU Hai-tao, XIE Yue, MA Hong-qiang. Axial strain characteristics of buried pipeline under landslide debris flow[J]. Journal of Lanzhou University of Technology, 2023, 49(2): 70-75.

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