22IndustrialConstructionVol.53,No.4,2023工业建筑2023年第53卷第4期基于无限元边界的输水隧洞爆破振动对周边高压输电铁塔的安全评估与优化∗赵勇1豆红强2王鹏3孙永鑫3(1.国网山东省电力公司,济南250001;2.福州大学紫金地质与矿业学院,福州350108;3.国网山东省电力公司经济技术研究院,济南250000)摘要:以周边临近多条高压输电铁塔且采用钻爆法施工的某拟建输水隧洞为工程依托,建立了爆破动荷载下基于无限元边界的动力数值计算模型,借此研究了高压输电铁塔的动力响应特征与隧洞围岩振速的衰减规律,并结合相应规范对拟订爆破施工方案予以评估与优化。研究结果表明,无限元边界可较好地反映爆破能量向半无限介质传播的真实情况,避免其在计算域内往复震荡;在爆破荷载作用下,隧洞围岩合振速随距爆破中心点距离的增加大致呈指数级衰减。基于相应规范选取了以2.0cm/s的峰值振动速度为安全判定标准,借此确定了三种拟订爆破施工方案的临界安全距离,进一步根据输水隧洞围岩工程特性与高压输电铁塔的相对位置关系,明确并优化了三种爆破施工方案在该输水隧洞中的分区施工范围。关键词:高压输电铁塔;爆破振动;无限元;安全评估;优化设计DOI:10.13204/j.gyjzG21042308SafetyAssessmentandOptimizationofHigh-VoltageTransmissionTowersAffectedbyBlastingVibrationofAdjacentOutletTunnelBasedonInfiniteElementBoundaryZHAOYong1DOUHongqiang2WANGPeng3SUNYongxin3(1.StateGridShandongElectricPowerCompany,Jinan250001,China;2.ZijinSchoolofGeologyandMining,FuzhouUniversity,Fuzhou350108,China;3.EconomicandTechnologyResearchInstitute,StateGridShandongElectricPowerCompany,Jinan250000,China)Abstract:Anoutlettunneladjacenttomultiplehigh-voltagetowerswillbeconstructedbyborehole-blastingmethod.Basedonthisprojectadynamicnumericalcalculationmodelwithinfiniteelementboundaryunderblastingdynamicloadwasestablished.Thecharacteristicsofthedynamicresponseforhigh-voltagetransmissiontowerswerestudied,andtheattenuationlawofthesurroundingrockvibrationvelocitywasalsodiscussed.Thentheproposedconstructionschemeswereevaluatedandoptimizedinaccordancewiththecorrespondingspecifications.Theresearchresultsshowedthattheinfiniteelementboundarycouldbetterreflecttheactualsituationoftheblastingenergypropagatingtothesemi-...
