...隧道；拱顶下沉；地表沉降；监测；预测 [gap=1677]Key words：tunneling engineering；metro tunnel；vault crown settlement；surface settlement；monitoring；prediction ...
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Based on the hazard of Yaocuntang arch tunnel engineering in the highway from Jingdezheng to Huangshan,the paper illustrated the necessity of field monitoring measurement in tunnel construction. By site monitoring,such as ground settlement,clearance convergence,vault crown settlement and site observation, etc.
以景(德镇)婺(源)黄(山)高速公路姚村坦连拱隧道施工中出现的险情为例,结合地表沉降、洞内净空收敛及拱顶下沉进行观测及现场观察,针对隧道出口段围岩失稳导致中导洞右侧工字钢严重内敛现象进行了动态预报,从而为及时采取有效措施排除险情争取了时间,避免了重大事故的发生,以此进一步说明了监控量测在隧道修建过程中的必要性。
参考来源 - 监控量测在姚村坦隧道施工险情预报中的应用Due to lag of settlement monitoring,measured vault crown settlement is merely a portion of total settlement in construction of city metro tunnel,and ratio of measured settlement to total settlement varies notably with ground condition.
由于变形监测的滞后，在城市地铁隧道施工中所测到的拱顶下沉通常仅为总下沉量的一部分，并且其所占的比例在不同地层条件下具有较大差异。
参考来源 - 期刊学术社区·2,447,543篇论文数据，部分数据来源于NoteExpress
At the same time, based on the measured data of vault crown settlement, a grey-synergetic prediction model is established by use of the grey theory and the synergetic theory.
并结合灰色理论和协同学理论，基于实测拱顶下沉数据，建立塌方时间预报的灰色-协同理论模型。
Therefore, the vault crown subsiding process and its total settlement are important factors for tunnel supporting design and environment controlling.
而隧道拱顶的下沉过程及其最终下沉量则是隧道支护设计及地层环境控制的重要基础。
The reliability of regression analysis is validated through numerical simulation; and the larger pre-settlement of vault crown is achieved ahead of heading face.
通过数值模拟验证了该分析结果的可靠性，并且开挖面前方的超前拱顶下沉量较大。
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