双层大跨桁架同步安装与多级卸载控制技术研究

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中图分类号：U448.121 文献标志码：A 文章编号：2095-2945（2026）03-0178-05

Abstract：Aimingattheproblemsof insuficientprocesscoordination，lackofloaddistributionalgorithms，andlagginggeen constructinintheconstructionofdouble-layerlarge-span truses，thispapertakestheWestem（Chongqing）ScienceHallproject astheengineringbackgroundandproposesatechnicalsystemof"integratedsmall-unitassembly-double-layersynchronous hoisting-gradedintellgentunloading."Throughhigh-precisionprefabricationofsmallunitsinthefactory（asemblyerror≤0.8 mm），combinedwithual-cranecoordinatedliftingbycrawlercranesandBIMsimulationtooptimizeliftingpointarrngement， synchronous installation of double-layer trusses is achieved（elevation and axis deviation ⩽3mm ）.The design of "dual-purpose installation-unloadingsupports，"combinedwithANSYSfiniteelementsimulationanddynamicstressmonitoring（accuracy ±1 MPa）， establishes a graded unloading control process， ensuring an unloading height difference ⩽15mm and stress variation rate ⩽10% ： Engineering practice shows that this technology reduces the construction period by 3O days and costs by 22% （cumulative savings of7.4684milionyuan），withdeformationcontrolmetingspecificationrequirements（maximumdeflectionvalueof12mm， displacementL/4Oo0）.Theresearchovercomeschallngessuchaslargepre-assemblyerrorsinirgularjoints，highrisksof high-ltitudeoperations，andasymmetricloadunloading，formingthe"Double-LayerLarge-SpanTrussSynchronousConstruction Method"Itprovidesafeasiblesolutionfoindustrialiedintellgentandgreenonstructionofsteelsructureprojetswihspans of 50-80m ，demonstrating significant economic benefits and promotion value.

Keywords：double-layerlong-spantrusse；synchronousinstalation;hierarchicalunloading;integratedassmbly;inteligent monitoring

在国外，双层大跨桁架施工以液压同步提升技术为主流。（剩余5606字）