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群洞开挖顺序对隧道仰坡的影响研究
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Abstract:
随着城市化进程的加快，寸土寸金的城市建设局面，涌现出大量的岩土工程技术问题亟待解决。研究群洞的开挖顺序对隧道仰坡的影响已经成为了城市地下工程建设中必须面临的一项重要课题。本论文依托重庆市红岩村隧道群工程，采用数值模拟方法，分别对三种开挖顺序进行了模拟。结果表明，开挖顺序为“先开挖车站隧道，再开挖上部的主线隧道”时群洞开挖引起仰坡的竖向位移最小，即隧道群开挖对隧道仰坡的影响最小。
With the acceleration of urbanization and the situation of urban construction, a large number of geotechnical engineering problems have emerged to be solved urgently. It has become an important task to study the influence of excavation sequence of group caves on the slope of tunnel. Based on the Hongyancun Tunnel group Project in Chongqing, this paper adopts numerical simulation method to simulate three kinds of excavation sequence. The results show that when the excavation sequence is “first excavating station tunnel, then excavating upper main tunnel”, the vertical displacement of inverted slope caused by group excavation is the least, that is, the impact of group excavation on the inverted slope of tunnel is the least.
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