岩石坍塌作用下埋地集输管道应力变化规律

兰州理工大学学报 ›› 2021, Vol. 47 ›› Issue (2): 60-64.

岩石坍塌作用下埋地集输管道应力变化规律

崔毅^*1, 麻宏强²

1.山西建筑职业技术学院设备工程系, 山西晋中 030619;
2.兰州理工大学土木工程学院, 甘肃兰州 730050

收稿日期:2020-08-11 出版日期:2021-04-28 发布日期:2021-05-11
通讯作者: 崔毅(1978-),男,山西晋中人,硕士,讲师.Email:cuiyi1978@126.com
基金资助:
国家自然科学基金(51808275),中国博士后科学基金(2018M643768),甘肃省自然科学基金(1606RJZA059)

Stress variation law of buried collecting and transporting pipeline under rock collapse

CUI Yi¹, MA Hong-qiang²

1. Equipment Engineering Department, Shanxi Architecture Vocationaland Technical College, Jinzhong 030619, China;
2. College of Civil Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China

Received:2020-08-11 Online:2021-04-28 Published:2021-05-11

摘要/Abstract

摘要： 基于弹塑性力学理论,采用有限元分析方法,建立了岩土坍塌作用下埋地集输管道分析模型,研究了岩石坍塌作用下不同因素对埋地集输管道应力影响规律.结果表明:冲击载荷随石块边长的增加呈指数形式上升,正方体边长改变1.4 m时,冲击载荷可改变22.4 MPa.运行压力、温度、管道铺设坡度对管道壁面应力影响较小,而冲击载荷、腐蚀是埋地集输管道安全的主要影响因素.当冲击载荷大于10.5 MPa时,管道进入塑性变形区.岩石坍塌冲击载荷较大时,管道壁面最大等效应力随着管道径厚比的增加而减少.当径厚比改变了3.8,管道壁面最大等效应力可减小44 MPa;当岩石坍塌冲击载荷较小时,管道壁面最大等效应力出现极小值点.

关键词: 岩石坍塌, 埋地管道, 有限元方法, 最大等效应力

Abstract: Based on the theory of elastic-plastic mechanics and finite element analysis method, the analysis model of buried gathering pipeline under the action of rock collapse is established, and the influence law of different factors on the stress of buried gathering pipeline under the action of rock collapse is studied. The results show that the impact load increases exponentially with the increase of the side length of the block. When the side length of the cube changes by 1.4 m, the impact load can be changed by 22.4 MPa. Operation pressure, temperature and pipeline laying slope have little influence on pipeline wall stress, while impact load and corrosion are the main factors affecting the safety of buried gathering and transportation pipelines. When the impact load is greater than 10.5 MPa, the pipe will enter the plastic deformation zone. When the rock collapse impact load is large, the maximum equivalent stress on the pipe wall decreases with the increase of the pipe diameter thickness ratio. When the diameter thickness ratio changes 3.8, the maximum equivalent stress on the pipe wall can be reduced by 44 MPa; when the rock collapse impact load is small, the maximum equivalent stress on the pipe wall appears a minimum point.

Key words: rock collapse, buried pipeline, finite element method, maximum equivalent stress

中图分类号:

TE832

崔毅, 麻宏强. 岩石坍塌作用下埋地集输管道应力变化规律[J]. 兰州理工大学学报, 2021, 47(2): 60-64.

CUI Yi, MA Hong-qiang. Stress variation law of buried collecting and transporting pipeline under rock collapse[J]. Journal of Lanzhou University of Technology, 2021, 47(2): 60-64.

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