不间断交通高速公路拓宽跨线桥拆除施工技术研究

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中图分类号：U445 文献标志码：A 文章编号：2095-2945（2025）24-0185-04

Abstract：Inorder tosolvethetechnical problemof thedemoltionofoverpass bridgesintheexpresswaywidening project underuninteruptedtraffcconditions，thispapertakesthereconstructionandexpansionprojectoftheXingxingxiaTowtoHami sectionoftheG3OLianyungang-KhorgosExpresswayasanexampletostudythedemolitionconstructionsystemofoverpas bridges.Inviewofthedificultiesinmaintainingexistingtraffcflow，safetyprotectionofadjacentrailwaysandficiency constraintsindesertenvironmentsthepaperanalyzestheshortcomingsofthetraditionalfullyencloseddemolitionplansuchas excessive vibration（ >5mm/s ）and insufficient diversion capacity（ < 60 % design standards），and proposes a modular static cutting coordinateddynamictraffcdiversiontechnology，Beidouhigh-preisiondeformationmonitoringnetworkandsteeltrestleandadar earlywarningdualprotectionsystem.Engineeringpracticeshowsthatthenewtechnologyreducesthepeakvibrationvalueof demolition operationsto 2.3mm/s ，controls the differential settlement in the transition section to 4.8 mm，and maintains the average daily traffic capacityof 12000 vehicles，which can not only ensure that normal trafic isnot affected，but also not delay the demolition construction progress.

Keywords：uninterruptedtransportation;highway；wideningoverpassbridge;demolitionconstruction；vibrationpeakvalue; differential settlement

1 工程概况

随着高速公路改扩建需求激增，既有跨线桥拆除工程面临“保畅通”与“保安全"的双重挑战。（剩余4755字）