重庆某长江大桥南城隧道洞室地基三维数值模拟分析

3D Numerical Stimulation Analysis on Caverns Foundation in NanCheng Tunnel of ChongQing ChangJiang River Bridge

本文针对重庆"骑龙经典"工程下卧重庆某长江大桥南城隧道洞室地基进行定性分析以及二维、三维数值模拟分析。在进行数值分析时采用加载系数法分别对隧道毛洞、隧道衬砌施加岩石自重和各倍数建筑荷栽标准值,并对分析结果进行比较。经综合分析表明,高层建筑的施工不会影响隧道洞室的稳定性,高层建筑可以按照常规方法进行设计。文章对建筑施工和监测提出了限定条件和建议。

This article conducted qualitative analysis and 2D, 3D numerical simulation analysis on Caverns foundation in NanCheng tunnel of ChongQing ChangJiang River Bridge. In numerical analysis, the author used the loading coefficient method to apply rock dead load and multiplier standard building load to tunnel caverns and tunnel linings, and then compared the result. Comprehensive analysis result indicated that the high-rise building construction would not influence the stability of tunnel caverns, and the conventional design method could be used in high-rise building. Also, this article proposed some limitations and suggestions for construction and monitoring.