摘要
由于Ⅴ级围岩软弱破碎,岩土体强度低,围岩开挖后易产生松动变形,导致拱顶下沉过大、掌子面塌方等病害。文章以广东省某在建高速公路隧道为例,利用有限差分软件FLAC3D,对软弱围岩隧道采用CRD工法开挖过程中的应力、变形和塑性区的发展历程进行模拟分析。研究结果对于类似工程的设计和施工具有一定的参考价值。
Due to the weak fragmentation of V-type surrounding rock and the low strength of rock and soil body, it is prone to the deformation and loosening after the excavation of surrounding rock,which will cause the dome falling down too much, the collapse of work surface and other diseases.With an expressway tunnel under construction in Guangdong as an example, by using the finite difference software FLAC3D,this article conducted the simulation analysis on the stress,deformation and the development process of plastic zone during the excavation of weak surrounding rock tunnel by CRD method.The research results have some reference value for the design and construction of similar projects.
作者
罗剑航
LUO Jian-hang(Guangzhou Cheng＇an Road ＆ Bridge Detection Co., Ltd., Guangzhou, Guangdong, 51000)
出处
《西部交通科技》
2017年第5期46-49,84,共5页
Western China Communications Science & Technology
