深基坑上跨運(yùn)營(yíng)盾構(gòu)隧道MJS加固方案優(yōu)化分析

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中圖分類(lèi)號(hào)：U231 文獻(xiàn)標(biāo)志碼：A 文章編號(hào)：1005-8249（2025）02-0060-08

DOI：10.19860/j.cnki.issn1005-8249.2025.02.011

Abstract：Inordertodeterminetheverticalupliftand horizontal deformationlawsofashieldtunnelconstructiononadeep foundationpit，acrossectiontunnelprojectonadeep foundationpitwastakenastheresearchobject.Thefiniteelement analysis method wasused to studythedeformationlawsofthetunnelunder diferentbasereinforcementareas，reinforcement depths，andreinforcement methods.Theresultsshow thattheuseof MJS basereinforcement method in silty strata can efectivelycontroltheupliftandhorizontaldeformationof tunnels，andreduce therelativedeformationoftunnelsections；The upliftdeformationofthetunneldecreaseswiththeincreaseofthebasereinforcementarea，andfullbotomreinforcement measuresshouldbetakentocontrolthedeformationofthetunel structure；Asthedepth offoundationreinforcementincreases， theupliftdeformationofthetunneldecreases.Afterthedepthoffoundationreinforcement excedsacertainlimit，increasingthe reinforcementdepthweakenstheefectofreducinguplftdeformation；Theportalreinforcementsystemformedbythe reinforcementofthestrataandfoundationonbothsidesofthe tunnelhassignificantadvantagesincontrolingthedeformationof thetunnel structure．Thehorizontaldeformationandupliftdeformationofthetunneldecreasewiththeincreaseofthe reinforcement width on both sides，and the optimal reinforcement width on both sides is 2 m .The research results can be used as a reference for similar projects.

Key words：pit；running tunnel；MJS construction method；numerical analysis；deformation；reinforcement plan

0 引言

隨著我國(guó)城市化的不斷發(fā)展，城市地下空間開(kāi)發(fā)利用增長(zhǎng)迅速，新建地下工程不可避免以鄰近、上跨、下穿等多種方式臨近既有地下建（構(gòu)）筑物施工，增加了施工難度，對(duì)保障既有建筑安全提出了更高的要求。（剩余8194字）