摘要
高铁隧道仰拱隆起病害频发,严重影响线路正常运营。提出一种用于高铁隧道变形致灾病害试验模拟的新方法,利用3D打印技术构建高铁隧道结构及附属设施精细模型,全方位考虑高铁隧道附属设施的工作状态,并系统介绍3D打印隧道模型的构件类型、打印材料及优选方法、打印流程等多方面内容;依托典型病害案例进行相似模型模拟试验,重现现场病害特征,探讨隧道排水量、结构外水压力和结构位移量的规律特征。研究结果表明:随地下水位的上升,隧道排水量与地下水位呈对数型增长关系;地下水位20 m后隧道排水量增量明显减缓、结构外水压力显著增加(尤其是隧底与拱顶)、底部结构隆起持续增长,且存在"隧底>内轨>外轨"的隆起量值特征;至地下水位50m时试验结果与现场病害特征吻合良好,验证了该方法的可行性与有效性。研究成果可为隧道病害及类似隧道模型试验的精细化模拟提供借鉴。
Invert heaving diseases occur frequently in high-speed railway(HSR) tunnels,seriously affecting the normal operation of railway lines. A new method for simulating deformation-induced diseases in HSR tunnels was proposed. A refined HSR tunnel model with tunnel structure and accessory facilities was constructed by using 3 D printing technology,and the working state of accessory facilities was considered in an all-round way. Those things related to the HSR tunnel model building were described in detail,including the classification of model components,3 D printing materials and their selection method,printing process,etc. Based on typical disease cases,disease simulation experiment was carried out to reproduce the disease characteristics of the site,and the characteristics of drainage,external water pressure and structural displacement were also discussed. The results show that,with increasing the groundwater level,the tunnel drainage increases logarithmically.While the groundwater level is more than 20 m,the increment of the drainage decreases obviously,the external water pressure of the structure increases significantly(especially at the bottom and the vault),and the uplift of bottom structure increases continuously with a feature of tunnel bottom>inner rail>outer rail. When the groundwater level is 50 m,the test results are in good agreement with the field disease characteristics,which verifies the feasibility and validity of the method. The research results are expected to provide reference for fine simulation of tunnel diseases and similar tunnel model tests.
作者
李林毅
阳军生
王立川
高超
蒋买勇
王子建
LI Linyi;YANG Junsheng;WANG Lichuan;GAO Chao;JIANG Maiyong;WANG Zijiang(School of Civil Engineering,Central South University,Changsha,Hunan 410075,China;China Railway Chengdu Group Co.,Ltd.,Chengdu,Sichuan 610082,China;Hunan Technical College of Water Resources and Hydropower,Changsha,Hunan 410131,China)
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2020年第7期1369-1384,共16页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(51878669)
中央高校基本科研业务费专项资助项目(2019zzts291)
湖南省水利科技重大项目(XSKJ2018179–01)。
关键词
隧道工程
3D打印技术
高铁隧道
仰拱隆起
病害模拟
模型试验
tunnelling engineering
3D printing technology
high-speed railway tunnel
invert heaving
disease simulation
model test
作者简介
李林毅(1994–),男,2016年毕业于中南大学土木工程专业,现为博士研究生,主要从事隧道工程方面的研究工作。E-mail:tunnel_lly@csu.edu.cn。
