长期服役管线隧道衬砌结构病害特征与规律分析  

Analysis on structural disease characteristics and laws of lining in long-serving pipeline tunnel

作　　者：高建章 钟泰枫 齐建波 刘禹阳 刘通达 GAO Jianzhang;ZHONG Taifeng;QI Jianbo;LIU Yuyang;LIU Tongda(China Oil&Gas Pipeline Network Corporation Southwest Pipeline Co.,Ltd.,Chengdu Sichuan 610213,China;School of Civil Engineering,Chang’an University,Xi’an Shaanxi 710064,China)

机构地区：[1]国家管网集团西南管道有限责任公司,四川成都610213 [2]长安大学建筑工程学院,陕西西安710064

出　　处：《中国安全生产科学技术》2024年第7期78-86,共9页Journal of Safety Science and Technology

基　　金：国家石油天然气管网集团有限公司科学研究与技术开发项目(SJSG202202)。

摘　　要：为明确长期服役下油气管道隧道本体结构健康状态,以服役2007—2024年且从未进行维修加固的47座油气管线山岭隧道为工程依托,基于隧道衬砌病害现场调研与历史检测结果,对管线隧道本体结构病害的原始积累情况进行详细统计,引入结构技术状况、养护关注度及病害密度等指标,同时对病害进行定量化分析,最终确定隧道的整体服役状态以及6类病害的发展特征与规律。研究结果表明:油气管线隧道大部分处于带伤正常服役状态,衬砌开裂发生频数最高且远大于其他病害,底板开裂隆起、衬砌劣化,二次欠厚及衬砌缺陷等病害常发,断面侵限发生概率低;直墙衬砌型式使得纵向裂缝为主的衬砌裂缝在隧道各部位均匀分布,具有短且窄特征,随裂缝宽度或长度的增加,裂缝占比随之减小;近半隧道衬砌混凝土强度劣化至设计强度以下,且低标号混凝土劣化程度远高于高标号;二衬欠厚拱顶拱腰处发生概率最高,且拱顶处缺陷长度远大于其他部位;Ⅴ级围岩段衬砌病害密度最小,超前支护与径向系统锚杆有效降低病害发生概率,纵向坡度的增加并未导致隧道病害密度的增加,隧道病害与隧道纵向坡度之间未表现明显的相关性。研究结果可为相关油气管线隧道利旧工程提供参考。In order to clarify the ontology structural health status of oil and gas pipeline tunnels under long-term service,47 mountain tunnels of oil and gas pipelines that had been in service from 2007 to 2024 and never been repaired and reinforced were taken as the engineering basis.Based on the field investigation and historical detection results of tunnel lining diseases,the statistics on the original accumulation situation of ontology structural diseases of pipeline tunnels was conducted in detail.The indexes of structural technical status,maintenance attention and disease density were introduced,and the diseases were quantitatively analyzed.Finally,the overall service status of the tunnel and the development characteristics and laws of six types of diseases were determined.The results show that most of the oil and gas pipeline tunnels are in normal service with injuries.The frequency of lining cracking is the highest and far greater than other diseases.The floor cracking and uplift,lining deterioration,secondary under-thickness and lining defects often occur,and the probability of section intrusion limit is low.The vertical wall lining type makes the lining cracks dominated by longitudinal crack evenly distributed in all parts of tunnel,with short and narrow characteristics.With the increase of crack width or length,the proportion of cracks decreases.The strength of lining concrete in nearly half of the tunnels has deteriorated below the design strength,and the deterioration degree of low-grade concrete is much higher than that of high-grade concrete.The probability of occurrence at the arch waist of secondary lining under-thickness vault is the highest,and the defect length at the vault is much larger than those of other parts.The lining disease density of grade V surrounding rock section is the smallest,and the advance support and radial system bolt effectively reduce the probability of disease occurrence.The increase of longitudinal slope does not lead to the increase of tunnel disease density,and there is no obv

关 键 词：油气管线 山岭隧道 本体结构 统计分析 结构病害 

分 类 号：X937[环境科学与工程—安全科学] X915.5