连拱隧道下穿高层建筑安全性分析

Safety Analysis on Engineering Characteristics of Multi-arch Tunnel Passing underneath Highrise Buildings

当前,国内外对于隧道下穿邻近建筑物的安全性影响分析及评估方法尚未建立,而作为异型结构的连拱隧道对邻近建筑物的影响研究更为缺乏。结合重庆市渝中区两江大桥渝中连接隧道的设计案例,采用地层-结构法对隧道下穿14层高层建筑进行力学分析。通过上部结构荷载估算、隧道建模等方法,建立连拱隧道下穿高层建筑安全性影响分析方法,并对隧道开挖后地基的变形与隧道支护的受力特性作出安全性评价,研究成果对类似工程具有参考与指导意义。

At present,there still has no good method for safety analysis and evaluation of tunnel passing through below the adjacent building structures,especially lacking in the study on multi-arch tunnel passing underneath adjacent building.Based on the design case of multi-arch tunnel,which will be set to connect two bridges in Yuzhong district,this paper studies the effect of tunnel construction on 14floor-building nearby using ground-structure mathematical method.Through the calculation of superstructure and the modeling of tunnel,a method is proposed for the evaluation of tunnel construction safety effect on adjacent building,and the analytical results including foundation deformation and tunnel support stress is provided accordingly.This research will serve as a good reference for similar engineering projects.