基于FDEM的地下内衬硐库密封结构-衬砌分缝协同优化设计研究
FDEM-based collaborative optimization of sealing structure and lining preset joint design in underground lined rock caverns
摘要
Abstract
Underground lined rock caverns(LRCs)used for compressed air energy storage are highly susceptible to cracking and the development of leakage pathways under cyclic high-pressure loading.Therefore,sealing performance and crack control are critical design challenges.This study employs the finite-discrete element method(FDEM)to develop an integrated rock-lining-sealing layer model,to systematically compare flat steel plate and wave-arch liners,as well as to analyze the influence of preset joint design parameters on crack evolution and sealing behavior.The results indicate that flat steel plate liners exhibit elevated stress levels,numerous cracks,and poor structural integrity,while preset joints provide only limited mitigation.In contrast,wave-arch liners significantly reduce peak stress and redistribute cracking,concentrating damage beneath arches,thereby lowering crack density,albeit with locally larger crack widths.A combined wave-arch and preset joint design further uniform crack propagation and alleviates liner stress.Increasing the number of wave arches and preset joints improves stress uniformity and crack control.However,the maximum crack width exhibits a"decrease-increase"trend,accompanied by a transition in liner stress mode from tension-dominated to bending-shear dominated behavior.When joints are placed at arch bottoms,cracks develop uniformly along the preset paths;when combined with waterproofing and drainage measures,leakage risks can be effectively managed.Overall,the wave-arch and preset joint composite design offers notable advantages in guiding crack development,releasing strain,and enhancing sealing reliability,providing a robust reference for coordinated optimization of sealing and lining design in underground LRCs.关键词
压缩空气储能/内衬硐库/密封层设计/衬砌分缝设计/有限-离散元方法Key words
compressed air energy storage(CAES)/lined rock cavern(LRC)/sealing layer design/lining preset joint design/finite-discrete element method(FDEM)分类
建筑与水利引用本文复制引用
孙冠华,王章星,王娇,董沂鑫,石露,刘治军,林姗..基于FDEM的地下内衬硐库密封结构-衬砌分缝协同优化设计研究[J].岩土力学,2026,47(2):497-514,18.基金项目
国家自然科学基金(No.52508463) （No.52508463）
湖北省自然科学基金重点项目(三峡创新发展联合基金)(No.2024AFD361) （三峡创新发展联合基金）
岩土力学与工程安全全国重点实验室前沿科学和关键技术"揭榜挂帅"项目(No.SKLGME-JBGS2404) （No.SKLGME-JBGS2404）
中国五矿集团有限公司科技专项计划"揭榜挂帅"项目(No.2025ZXA04).This work was supported by the National Natural Science Foundation of China(52508463),the Key Program of Natural Science Foundation of Hubei Province(Three Gorges Innovation Development Joint Fund)(2024AFD361),the Frontier Science and Key Technologies"Open Bidding for Selecting the Best Candidates"Project of the National Key Laboratory of Geomechanics and Engineering Safety,Chinese Academy of Sciences(SKLGME-JBGS2404)and the Science and Technology Special Program"Open Bidding for Selecting the Best Candidates"Project of China Minmetals Corporation(2025ZXA04). （No.2025ZXA04）
