考虑界面脱空和土体屈服的盾构下穿管线响应计算  

Estimation of pipeline responses induced by shield tunnelling considering gap formation and soil yielding

作　　者：林存刚 王忠杰 赵辰洋 陈瑜 梁禹 黄林冲 丁智 LIN Cungang;WANG Zhongjie;ZHAO Chenyang;CHEN Yu;LIANG Yu;HUANG Linchong;DING Zhi(School of Civil Engineering,Sun Yat-sen University,Guangzhou 510275,China;State Key Laboratory for Tunnel Engineering,Guangzhou 510275,China;Guangdong Research Center for Underground Space Exploitation Technology,Guangzhou 510275,China;Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519082,China;Guangdong Key Laboratory of Marine Civil Engineering,Guangzhou 510275,China;Key Laboratory of Safe Construction and Intelligent Maintenance for Urban Shield Tunnels of Zhejiang Province,Hangzhou 310015,China)

机构地区：[1]中山大学土木工程学院,广东广州510275 [2]隧道工程灾变防控与智能建养全国重点实验室,广东广州510275 [3]广东省地下空间开发工程技术研究中心,广东广州510275 [4]南方海洋科学与工程广东省实验室(珠海),广东珠海519082 [5]广东省海洋土木工程重点实验室,广东广州510275 [6]浙江省城市盾构隧道安全建造与智能养护重点实验室,浙江杭州310015

出　　处：《岩土工程学报》2024年第10期2129-2137,共9页Chinese Journal of Geotechnical Engineering

基　　金：广东省基础与应用基础研究基金项目(2023A1515030243,2023A1515011634);珠海市基础与应用基础课题研究项目(ZH22017003210005PWC);广东省“珠江人才计划”引进创新创业团队项目(2021ZT09G087);国家自然科学基金面上项目(52174101,52208380);浙江省城市盾构隧道安全建造与智能养护重点实验室开放基金项目(ZUCC-UST-22-03)。

摘　　要：大量试验证实盾构隧道开挖可引起管线与土体界面脱空和土体屈服现象。基于无拉力Winkler地基及管线地基承载力理论,将界面脱空和土体屈服判据条件引入管土线弹性相互作用分析;由此推导了考虑界面脱空和土体屈服影响的管土非线性相互作用计算方法,并与模型试验结果对比验证了其适用性。参数分析发现,界面脱空范围随管线抗弯刚度增大而拓宽;受管土分离和地基屈服影响,管线响应随地层损失呈非线性变化;在土体脱空和屈服范围较大时,其对管线响应影响显著,忽略该效应将导致计算管线挠度和弯矩过于保守。The extensive tests confirm gap formation and soil yielding at the pipe-soil interface during shield tunnelling.By incorporating the tension-free Winkler foundation model and the theory of pull-out and compressive bearing capacity of pipeline,the criteria for gap formation and soil yielding are introduced into the pipe-soil linear elastic interaction theory.A method for calculating the nonlinear pipe-soil interaction,accounting for gap formation and soil yielding,is derived and validated against the model tests.The parametric studies reveal that interface gap gets wider with the increasing flexural stiffness of pipeline.The pipeline response exhibits nonlinear changes as an increase in the volume loss due to pipe-soil separation and subgrade yielding.When the interface gap and yielding range are large in width,it significantly affects the pipeline response.Ignoring this effect may lead to overly conservative calculations of deflection and bending moments of pipeline.

关 键 词：盾构隧道开挖 管土相互作用 界面脱空 土体屈服 无拉力WINKLER地基 

分 类 号：TU411[建筑科学—岩土工程]