支护-结构一体化管幕预筑法地铁车站优化分析

Optimized Analysis of the Supporting-structure Integration Pipe-roofing Pre-construction Method of Subway Station

基于有限差分软件FLAC^(3D),以沈阳地铁2号线新乐遗址站为依托,以管幕预筑地铁车站结构周边地层沉降值为参考,探讨了地下工程支护-结构一体化管幕预筑法地铁车站优化分析。研究表明,钢管净距的增加、除去内侧钢管,或在大直径钢管内不绑扎钢筋,直接采用素混凝土,车站周边上方土层的沉降值相差不大。

Based on finite difference software FLAC3D,taking Shenyang subway line 2 Xinleyizhi subway station as the background and the main structure surrounding strata subsidence value as reference,this paper discusses the design and construction optimization of supporting-structure integration pipe-roofing pre-construction method subway station. The research shows that,increasing pipe-jacking spacing,removing inside tube,applying plain concrete in steel tube make soil subsidence values to have a small change compared with original construction method.