Abstract

Tunnel construction is becoming necessary as cities continue to grow, particularly in crowded locations. Thus, the majority of tunneling projects include creating two parallel tunnels, which known as twin tunnels. The excavation action in a slope constitute a crucial issue due to threaten the stability of the slope during the excavation procedure. In this paper an optimized study has been proposed to obtain the best design for distributing the support system through a huge fill slope. Two main methodologies have been proposed to get the optimized design for the support system. The first one is by making a physical model. While, the second one is through the numerical simulation using Plaxis3D software package. Two main modified issues for the support system have been considered: the first is through modifying the dimensions of the support system. The second is through changing the distribution of the support system. However, according to the two proposed cases which are: the case study from Guizhou site and the optimized one, the results revealed that the settlement has been decreased after modifying the usage of the support system in the optimal case.

中文翻译：

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穿越填方边坡平行隧道开挖支护系统稳定性优化设计

摘要

随着城市的不断发展，尤其是在拥挤的地区，隧道建设变得越来越有必要。因此，大多数隧道工程包括建造两条平行隧道，称为双隧道。边坡开挖作业是一个关键问题，因为它会威胁到开挖过程中边坡的稳定性。本文提出了一项优化研究，以获得通过巨大填方坡度分布支撑系统的最佳设计。提出了两种主要方法来获得支撑系统的优化设计。第一个是制作物理模型。而第二个是通过使用 Plaxis3D 软件包进行数值模拟。支撑系统主要考虑了两个修改问题：第一是通过修改支撑系统的尺寸。二是通过改变支持体系的分布。然而，根据贵州站点的案例研究和优化案例这两个提出的案例，结果表明，在优化案例中修改支撑系统的使用后，沉降有所减少。