某基坑开挖对邻近区间隧道的影响分析

Influence of a Deep Excavation on the Adjacent Tunnel

地铁沿线的商业契机,必然存在邻近地铁的深大基坑开挖。而深大基坑的开挖卸载,将引起区间隧道结构的变形,当变形超过一定范围时,会影响地铁行车安全。以南昌某基坑为实例,采用三种计算手段,研究了深基坑开挖对邻近区间隧道的影响,旨在研究南昌地区土层深基坑开挖对邻近区间隧道的影响,研究成果对后续类似工程具有一定的参考意义。

With the increasing commercial estate opportunity along the subway lines,large size deep excavations are frequently encountered adjacent to the metro tunnel alignments.The excavation induced unloading at these large sized deep excavation projects might result in the deformation of the adjacent tunnels.If the excessive deformation occurs in the tunnel structures,the safe operation of the metro cars might be compromised.This paper presents a deep excavation history in Nanchang City.The influence of the deep excavation on the adjacent metro tunnel structures are investigated with three different analytical methods.