苏州凤凰山连拱加小净距隧道计算  

Calculation Analysis of Multi-arch and Small Spacing Tunnels in Suzhou Fenghuang Mountain

作　　者：方忠强[1] 王涛[1] 李浩[1] 王新刚[1] 

机构地区：[1]江苏省交通规划设计院有限公司,江苏南京210005

出　　处：《现代交通技术》2010年第1期60-62,共3页Modern Transportation Technology

摘　　要：苏州市凤凰山隧道属于软弱围岩中浅埋大跨度连拱加小净距隧道,且隧道穿越凤凰山公墓区,隧道上方公墓密集,对隧道设计和施工技术要求很高。基于地层-结构法,用有限元对隧道施工过程进行模拟,重点分析了围岩位移场和应变场以及初期支护、锚杆和二次衬砌的受力,分析隧道横断面危险点,在设计中采取相应安全措施,并优化开挖工法,计算确定隧道爆破施工和机械开挖的埋深分界点。Fenghuang mountain tunnels are shallow covered multi-arch and small spacing tunnels with large span in soft-weak surrounding rock, and tunnels under pass Fenghuang mountain cemetery on which graves are intensive. The project is very strict to design and construction.Based on layer-structure method, the construction is simulated by finite element method, and the displacement and strain of surrounding rock, the internal force of primary lining, anchor stocks and secondary lining are analyzed. The critical sections are analyzed, and safety measures are adopted in design process, and construction method is optimized. The buried depth between blasting and mechanical exaction is calculated.

关 键 词：连拱隧道 小净距隧道 有限元 爆破施工 

分 类 号：U452.27[建筑科学—桥梁与隧道工程]