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首页> 外文会议>Pipeline Division Specialty Conference; 20050821-24; Houston,TX(US) >Finite element analysis of 3D full scale tunnel excavation using subloading tij model
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Finite element analysis of 3D full scale tunnel excavation using subloading tij model

机译：基于子加载tij模型的3D隧道全尺寸开挖有限元分析

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摘要

Finite element analyses are carried out on 3D full tunnel excavation for both New Austrian Tunneling Method (NATM) and Tunnel Boring Machine (TBM) using the elastoplastic subloading t_(ij) model. The effect of ground characteristics on surface settlement and earth pressure is investigated considering two ground types. Two excavation sequences are also considered to investigate the influence of excavation sequences in tunneling. It is revealed that for a given ground type, the excavation sequence did not affect significantly the final settlement trough. However, final settlement is much dependent on the soil characteristics. In TBM, tunnel excavation is simulated considering soil-water coupled analysis. Two excavation rates are employed in the simulations to investigate the influence of excavation rate on ground movement. It is demonstrated that surface settlement depends on the excavation rate that is employed during construction, and the ground settles continuously even after completion of the tunnel excavation due to the dissipation of pore water pressure.
机译：使用弹塑性重载t_（ij）模型对3D全隧​​道开挖进行了新奥地利隧道掘进方法（NATM）和隧道掘进机（TBM）的有限元分析。考虑两种地面类型，研究了地面特性对地表沉降和土压力的影响。还考虑了两个挖掘序列以研究挖掘序列在隧道中的影响。结果表明，对于给定的地面类型，开挖顺序不会显着影响最终的沉降槽。但是，最终的沉降很大程度上取决于土壤的特性。在TBM中，考虑土水耦合分析来模拟隧道开挖。在模拟中采用两种开挖速率来研究开挖速率对地面运动的影响。结果表明，地表沉降取决于施工过程中的开挖速率，由于孔隙水压力的消散，即使在隧道开挖完成后，地面也会连续沉降。

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