ADINA在隧道开挖中的数值模拟应用

采用ADINA软件,通过对鲍家湾隧道的开挖进行数值模拟。对比台阶法、单侧壁导坑法、双侧壁导坑法三种不同开挖方法的力学性质,找出最合理的施工方法。研究结果表明：隧道的开挖过程是和应力路径与应力历史密切相关的非线性不可逆过程。采用不同的开挖步骤将会引起程度不同的变形和应力状态。也就是说,只有考虑施工过程才能准确反映隧道施工过程中围岩和结构的应变、应力状态,也才能保证隧道的安全施工。

Numerical Simulation Application of ADINA in Tunnel Excavation

The exacavation process of Baojiawan tunnel is simulated using ADINA software, contrast mechanical property of benching tunnelling method to the unilateral and the double side-drift method, then find the most reasonable construction method. The research results have showed that the excavating process is a non-linear irreversible process tightly related with stress paths and stress history. The different excavation method arose different distortion and stress form, that is only consider construction process accurately reflect the stress an strain form of wall rock and structure ,also ensure the safe tunnel construction.