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(廣東省建筑設(shè)計(jì)研究院，廣州510010)
［提要］廣州市珠江新城核心區(qū)市政交通項(xiàng)目的主體結(jié)構(gòu)從地鐵5號(hào)線隧道上方跨越而過。結(jié)構(gòu)設(shè)計(jì)中針對(duì)地鐵保護(hù)的要求以及工程結(jié)構(gòu)布置、巖土地質(zhì)狀況、各部位與地鐵隧道的空間關(guān)系等具體條件，通過各類計(jì)算分析進(jìn)行了多種結(jié)構(gòu)方案對(duì)比，并將最終方案落實(shí)到結(jié)構(gòu)設(shè)計(jì)中，同時(shí)提出了具體措施與要求。結(jié)合該工程上述方案對(duì)比及設(shè)計(jì)措施，為跨越地鐵隧道的同類結(jié)構(gòu)提供了分析與設(shè)計(jì)方面的經(jīng)驗(yàn)與參考做法。
［關(guān)鍵詞］跨越地鐵隧道；預(yù)應(yīng)力；托換；地鐵保護(hù)
Analysis and Design About Structure Spanning over Subway Tunnel/Lin Jinghua，Chen Xing，Xiang Qian，Ou Yanjun(The Architectural Design and Research Institute of Guangdong Province, Guangzhou 510010, China)
Abstract: In the municipal project of Guangzhou Zhujiang New Town Core Area, parts of the main structure span are over the No.5 metro tunnel. Due to the critical safety requirement of the tunnel, analysis and comparison are applied in technical schemes about the spanning structure. The optimum scheme is deepened and implemented in structural design. Summarized from the design procedure above, experience and measures for similar span-over-tunnel structure are provided.
Keywords: spanning over subway tunnel; prestress; transforming support; subway protection