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(廣東省建筑設(shè)計(jì)研究院，廣州510010)
［提要］在現(xiàn)有地鐵隧道上部進(jìn)行大開(kāi)挖施工時(shí)如何確保隧道安全，是近年來(lái)城市建設(shè)中學(xué)術(shù)界和工程界普遍關(guān)注的問(wèn)題。針對(duì)需要垂直跨越地鐵五號(hào)線建設(shè)的廣州市珠江新城地下空間項(xiàng)目，借助ANSYS軟件建立了三維彈塑性有限元模型，模擬了地下空間施工過(guò)程中對(duì)原有地鐵隧道的施工效應(yīng)。數(shù)值分析結(jié)果表明，在擬定的隧道結(jié)構(gòu)保護(hù)措施和施工方案下，施工期間原有地鐵隧道沒(méi)有安全隱患，并取得了一些有意義的結(jié)論和建議，為該工程的實(shí)施和類(lèi)似項(xiàng)目的開(kāi)展提供了指導(dǎo)作用和借鑒意義。
［關(guān)鍵詞］地下空間；地鐵隧道；大開(kāi)挖；隧道保護(hù)；施工效應(yīng)；ANSYS
3D Numerical Simulation on Spatial Influence During Large Excavation Construction upon the 5th Metro Tunnel/Xiang Qian,Chen Xing, Luo Chiyu,Lin Jinghua (The Architectural Design and Research Institute of Guangdong Province, Guangzhou 510010, China)
Abstract: How to guarantee the metro tunnel"s safety if large excavation construction happened upon is an important practice problem drawing exclusive attention presently in academic and industry field. Based on the Zhujiang New Town Guangzhou Underground Cavity which will be constructed cross the fifth metro tunnel, 3D FE model is built with ANSYS and the tunnel responses to excavation construction are simulated. The numerical analysis result indicates that there will be no potential risk of safety on the 5th metro tunnel during construction if applying proposed tunnel protection measures and construction scheme. Some useful conclusion and advices are acquired, which can be referred for this project and similar engineering.
Keywords: underground cavity; metro tunnel; heavy excavation; tunnel protection; construction effect; ANSYS