高钢级山地管道设计及安全性评估的再认识  

Re-recognition of design and safety evaluation of high-grade steel mountain pipeline

作　　者：胡文君 赵宇[1,2] 胡凯衡[1,2] 谌贵宇 付开伟 张晓鹏 HU Wenjun;ZHAO Yu;HU Kaiheng;CHEN Guiyu;FU Kaiwei;ZHANG Xiaopeng(Key Laboratory of Mountain Hazards and Surface Process,Chinese Academy of Science,Chengdu 610041,P.R.China;Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610041,P.R.China;University of Chinese Academy of Sciences,Beijing 100049,P.R.China;China PeItroleum Engineering&Construction Southwest Company,Chengdu 610017,P.R.China)

机构地区：[1]中国科学院山地灾害与地表过程重点实验室,成都610041 [2]中国科学院、水利部成都山地灾害与环境研究所,成都610041 [3]中国科学院大学,北京100049 [4]中国石油工程建设有限公司西南分公司,成都610017

出　　处：《重庆大学学报》2023年第5期83-92,共10页Journal of Chongqing University

基　　金：国家自然科学基金面上项目(41671116);“川气东送二线管道工程”资助项目(2020230C)。

摘　　要：永久性地面变形(permanent ground deformation,PGD)是造成山地管道屈曲断裂泄露并导致重大生命、财产损失的主要原因之一。现有PGD区山地管道“基于应变”的设计及安全性评估方法和技术标准对在役高钢级管道安全性评估偏于危险,亟待对其进行进一步的研究。针对山地复杂PDG工况下的“许用应变”及“计算应变”,从山地管道的主要失效模式着手,对山地管道管–土相互作用的应变计算方法(解析法、数值分析法及试验法)及安全性评估方法的技术现状及存在问题进行了分析,并结合我国山地管道未来的发展趋势及生产需要,提出了考虑在役管道的实际工况,进行基于管–土相互作用规律的设计及安全性评估方法的研究路径和内容。Permanent ground deformation(PGD)is one of the main causes of buckling,fracture and leakage of mountain pipeline,resulting in heavy loss of life and property.The existing“strain-based method”and technical standards cannot satisfy the urgent needs of design and safety evaluation of in-service high-grade steel pipelines in PGD zone and need further research.The current situation of“strain-based”failure discrimination is firstly analyzed and summarized.Technical actualities and imperfections of strain calculation methods(analytical,numerical,and experimental methods)and safety evaluation methods for pipe-soil interaction are indicated by the main patterns of pipe failure with the “allowable strain” and “calculated strain” under complex PDG working conditions. Future research topics and path of the design and safety evaluation based on actual working conditions and pipe-soil interactions are synthetically proposed, while considering the future development trend and production needs of mountain pipelines in China.

关 键 词：高钢级 山地管道 永久性地面变形(PGD) 基于应变 管–土相互作用 设计及安全性评估 

分 类 号：TH11[机械工程—机械设计及理论]