2023·1·BuildingConstruction130地下长距离水平冻结加固及开挖清障技术赵培上海市机械施工集团有限公司上海200072摘要：受施工环境、技术和装备水平的影响，目前盾构机直接穿越重要构筑物基础和围护结构难度极大。通过采用地下长距离水平冻结加固及开挖清障技术，在软土地层距运营地铁站底板下2.209m，穿越4道地下连续墙（含斜向）和8根格构柱，实现42m单向高精度水平穿障钻孔；通过运营地铁车站下方大体量冻胀控制、冻结断管修复和免拔技术，保证了直径7.9m、长38m的隧道安全及盾构机的顺利穿越，减少了对环境的影响，实现了浅覆土大断面长距离轨交隧道区间和车站的暗挖建造。关键词：长距离水平冻结；地下连续墙清障；暗挖支护；大体量冻胀；断管修复中图分类号：TU99文献标志码：A文章编号：1004-1001(2023)01-0130-05DOI：10.14144/j.cnki.jzsg.2023.01.034LongDistanceHorizontalFreezingReinforcementandExcavationObstacleRemovalTechnologyZHAOPeiShanghaiMechanizedConstructionGroupCo.,Ltd.,Shanghai200072,ChinaAbstract:Affectedbytheconstructionenvironment,technologyandequipmentlevel,itisverydifficultforshieldmachinetodirectlypassthroughthefoundationandsupportofimportantstructures.Throughtheadoptionofundergroundlongdistancehorizontalfreezingreinforcementandexcavationandobstacleremovaltechnology,the42mone-wayhigh-precisionhorizontalobstacledrillingisrealizedbycrossing4undergroundcontinuouswalls(includinginclined)and8latticecolumnsat2.209mundertheflooroftheoperatingsubwaystationinthesoftsoillayer.Throughthelargevolumefrostheavecontrol,freezingbrokenpiperepairandpull-outfreetechnologyundertheoperatingsubwaystation,thesafetyofthetunnelwithadiameterof7.9mandalengthof38mandthesmoothpassageoftheshieldmachineareensured,theimpactontheenvironmentisreduced,andtheconstructionoftheshallowcoveredlarge-spanlong-distancerailtransittunnelsectionandthestationisrealized.Keywords:longdistancehorizontalfreezing;removalofdiaphragmwall;undergroundexcavationandsupport;largevolumefrostheave;brokenpiperepair本区间隧道上下行线自东向西需依次穿越新建18号线国权路车站主体围护结构（A墙）、10号线国权路车站东侧主体围护结构（B墙）、10号线国权路车站西侧主体围护...
