复杂环境下特浅埋暗挖地下隧道信息化施工监测分析

Monitoring analysis on the informative construction for the shallow underground tunnel under complicated construction conditions

为了对复杂环境下特浅埋暗挖地下隧道进行优化设计,并在施工中严格控制地层沉降,保障道路和地下各种管线的安全,需掌握围岩和支护的动态信息并及时反馈。本文以某地下隧道为工程背景,对地面位移变化情况进行现场监测,表明监测断面整个沉降过程大致可以分为4个阶段,微小沉降阶段、沉降剧增阶段、缓慢沉降阶段、沉降基本稳定阶段,得到了每个阶段下地表的沉降情况,以指导地下隧道设计和施工。

In order to do the optimum design for the shallow underground tunnel in the complicated construction environment, and to control the settlement of the ground during construction and to make sure the safety of the roads and underground pipelines, it is necessary to understand the dynamic information of the surrounding rock mass and its reinforcement and the in-time feedback. Taking an underground tunnel as the engineering background, the ground displacement is monitored, and it is shows that the settlement of the section planes could be divided into four phases, the small settlement phase, the rapid increase phase, the small increase phase and the stable phase for the settlement. The settlement of the ground for each phase is obtained to give guidance for the design and construction of the underground tunnel.