深大基坑開(kāi)挖對(duì)既有地鐵結(jié)構(gòu)的影響分析

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【摘    要】：針對(duì)深大基坑施工對(duì)既有地鐵結(jié)構(gòu)安全的影響問(wèn)題，以實(shí)際工程為例，通過(guò)理論分析與三維數(shù)值模擬，分析基坑開(kāi)挖對(duì)既有地鐵結(jié)構(gòu)的影響。結(jié)果表明：基坑開(kāi)挖將導(dǎo)致地鐵結(jié)構(gòu)產(chǎn)生變形和不均勻沉降，須嚴(yán)格按設(shè)計(jì)方案施工并采取可靠的施工方案方能保證既有結(jié)構(gòu)的安全。

【關(guān)鍵詞】：基坑；地鐵；結(jié)構(gòu)安全

【中圖分類(lèi)號(hào)】：TU753 【文獻(xiàn)標(biāo)志碼】：C 【文章編號(hào)】：1008-3197（2024）02-66-04

【DOI編碼】：10.3969/j.issn.1008-3197.2024.02.017

Analysis of the Influence of Deep and Large Foundation Pit Excavation on the Existing Subway Structure

SUN Shichen

（Tianjin Municipal Engineering Design and Research Institute ，Tianjin 300392，China）

【Abstract】： In view of the influence of deep and large foundation pit construction on the safety of existing subway structures， this paper takes the actual project as an example， analyzing the influence of foundation pit excavation on existing subway structures through theoretical analysis and three-dimensional numerical simulation.The results show that the excavation of foundation pit will cause deformation and non-uniform settlement of subway structure.Therefore， only by strictly following the design plans and adopting reliable methods during construction can the safety of existing structures be guaranteed.

【Key words】：foundation pit; subway; structural safety

隨著我國(guó)軌道交通建設(shè)的發(fā)展，工業(yè)、民用建筑基坑鄰近既有地鐵結(jié)構(gòu)施工的情況越來(lái)越多。（剩余2608字）