高拱坝施工期横缝增开现象及其相关成因研究

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1、Seediscussions,stats,andauthorprofilesforthispublicationat:https://www.researchgate.net/publication/287177170StudyonabruptgapeoftransversejointsanditscauseduringconstructionofhigharchdamsArticleinShuiliFadianXuebao/JournalofHydroelectricEngineering·October2013CITAT

2、IONSREADS2284authors,including:YingcaihuDanniLuoJilinUniversityGuangxiUniversity41PUBLICATIONS284CITATIONS8PUBLICATIONS52CITATIONSSEEPROFILESEEPROFILEAllcontentfollowingthispagewasuploadedbyDanniLuoon14March2017.Theuserhasrequestedenhancementofthedownloadedfile.第32

3、卷第5期水力发电学报Vol．32No．52013年10月JOUＲNALOFHYDＲOELECTＲICENGINEEＲINGOct．，2013高拱坝施工期横缝增开现象及其相关成因研究胡昱，左正，李庆斌，罗丹旎(清华大学水沙科学与水利水电工程国家重点实验室，北京100084)摘要:高拱坝施工期横缝开合度变化较复杂，实际工程中出现了一种特殊的横缝增开现象，具有非常明显的同时性和普遍性，并可能对坝体已灌浆部位造成不利影响。本文通过对工程实例的分析与总结，提出了缝面蓄能的概念，指出缝面蓄能过多、通水检查等外因诱导是横缝增开现象的主要成

4、因。本文利用双层有厚度横缝单元对实际工程进行了仿真模拟与数值试验，计算结果说明考虑横缝单元的生死能够有效模拟该现象，数值试验也指出保证横缝在理想时段的及时拉开可以预防横缝增开现象的发生。关键词:水工结构;横缝增开;测缝计;高拱坝中图分类号:TV331文献标识码:AStudyonabruptgapeoftransversejointsanditscauseduringconstructionofhigharchdamsHUYu，ZUOZheng，LIQingbin，LUODanni(StateKeyLaboratoryofHy

5、droscienceandEngineering，TsinghuaUniversity，Beijing100084)Abstract:Openingandclosingoftransversejointsduringconstructionofhigharchdamsareverycomplicated，andinsomeprojectsthejointapertureshaveshowedabnormalbehaviorcalledabruptgape．Thesejoints，distinguishedwithtwoobv

6、iousfeatures，synchronizationanduniversality，mayhaveunfavorableeffectsongroutedarea．Toexplaintheabruptjointgape，thispaperproposesaconceptoftensionenergyofjointinterface．Analysisonpracticalprojectsindicatesthathightensionenergyandexternalforcessuchaspressurewaterchec

7、kingarethemajorcausesofabruptjointgape．Asimulationoftransversejointsforahigharchdambyadopting3Ddoublejointelementsoffinitethicknessispresentedinthispaper，anditisshownthatabruptgapecanbesuccessfullymodeledthroughactivatinganddeactivatingthe3Djointelements．Numericale

8、xperimentsindicatethatpullingthetransversejointsopeninanidealperiodisaneffectivemeasuretoavoidthegapeproblem．Keywords:hydraulicstructure;abruptga