三线隧道并行穿越金达路跨线桥变形分析

Deformation analysis of three-line tunnel crossing Jinda Road span bridge in parallel

为研究盾构区间、桥桩、已建隧道的变形相互关系,确保盾构顺利掘进已建隧道及桥梁的正常使用,以实际工程为例通过计算分析,较为详细地总结了并行、交叠隧道和近接侧穿桥桩工程,结合宁波地质特点和工程实际情况,提出一系列变形控制建议值,并对重要的市政桥梁采取主动保护措施,对于以后的工程实践具有一定的参考价值。

In order to study the correlation between the deformation of shield,soil and built tunnels,safely and economically control the displacement of built tunnels caused by close construction,and ensure the smooth boring of shield tunnels and the normal use of built tunnels,this paper takes the actual project as an example to summarize the parallel and overlapping tunnels and the pile engineering of the adjacent side bridge in detail,combines the geological characteristics of Ningbo and the actual situation of the project,puts forward a series of deformation control suggestions,and takes active protection measures for important municipal bridges.It has certain reference value for future engineering practice.