大跨度明挖隧道断面与结构形式调研与分析

Research and Analysis on Section Type and Structural Type of Large-span Open Cut Tunnel

随着城市道路交通量增大以及人们对城市环境和景观要求的不断提高,城市地下通道越来越多,断面尺寸也越来越大,我国对于大跨度隧道工程的需求正与日俱增。本文基于国内外大跨度地下通道现有工程案例,调研其常用断面型式(多跨矩形断面、连拱断面等)以及常用结构形式(钢箱结构、预应力混凝土和钢混结构等),总结其发展趋势,进而提出大跨度地下通道断面及结构形式的关键技术问题,为大跨度地下通道建设提供技术参考。

With the increasing traffic volume of urban roads and the continuous improvement of people's requirements for urban environment and landscape,there are more and more urban underground passages,and the cross-sectional size is also becoming larger and larger.The demand for large-span tunnel engineering in China is increasing day by day.Based on the existing engineering cases of large-span underpasses at home and abroad,this paper investigated the common section types of large-span underpasses(multi-span rectangular section,multi-arch section,etc.)and common structural types(steel box structure,prestressed concrete and steel-concrete structure,etc.),summarized the development trend of large-span underpasses,and then put forward the key issues of large-span underpasses section and structural types,and provided technical basis for the construction of large-span underground passage.