不間斷交通高速公路拓寬跨線橋拆除施工技術(shù)研究

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中圖分類號：U445 文獻(xiàn)標(biāo)志碼：A 文章編號：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 工程概況

隨著高速公路改擴(kuò)建需求激增，既有跨線橋拆除工程面臨“保暢通”與“保安全"的雙重挑戰(zhàn)。（剩余4755字）