doi:10.3963/j.issn.1674-6066.2023.03.039超大断面矩形顶管隧道全断面渣土改良施工技术程斌1,陈治2(1.武汉城市职业学院建筑工程学院,武汉430064;2.上海隧道工程股份有限公司,上海200233)摘要:土压平衡盾构机在地铁区间隧道施工中应用非常广泛,但如遇到地质情况差,就存在沉降大、掘进困难,开挖面围岩土体稳定性不易保持等问题。通过某城市道路隧道工程超大断面矩形顶管隧道推进期间全断面渣土改良剂的选择、土体改良口的设置及施工技术的应用,使得盾构掘进顺畅、高效,减少停机时间,防止螺旋机中渣土固结,从而保障施工安全顺利。结果表明,最佳的改良剂参数和掘进参数的改进,能加快掘进速度,减少盾构机磨损。关键词:超大断面;矩形顶管;渣土改良;施工技术ConstructionTechnologyofWholeSectionMuckImprovementforSuperLargeSectionRectangularPipeJackingTunnelCHENGBin1,CHENZhi2(1.SchoolofArchitectureandEngineering,WuhanCityPolytechnic,Wuhan430064,China;2.ShanghaiTunnelEngineeringCo,Ltd,Shanghai200233,China)Abstract:Theearthpressurebalanceshieldmachinewaswidelyusedintheconstructionofmetrosectiontunnels.However,incaseofpoorgeologicalconditions,therewereproblemssuchaslargesettlement,difficultyintunneling,anddifficultyinmaintainingthestabilityofthesurroundingrockontheexcavationface.Throughtheselectionoffull-sec-tionmuckimprover,thesettingofsoilimprovementportandtheapplicationofconstructiontechnologyduringtheco...