合理的扁平率对大断面隧道稳定性和经济性具有重要的意义。
Reasonable span-ratio has an important effect on configuration stability and economical nature of large-span tunnel.
同时，论述了大跨度隧道的稳定性以及断面尺寸、扁平率和隧道埋深对稳定性的影响。
At the same time, the stability of big-span tunnel with influence factor such as section size, high-span ratio and depth is studied.
其次，根据构建原则筛选建立山岭地区大断面公路隧道施工风险预警指标体系。
Secondly, according to construction principle and select to build the establishment of mountain regions large-section of highway tunnel construction risk early-warning indicators.
本文介绍变断面衬砌台车设计，用以解决重庆嘉华大坪隧道变断面大跨度衬砌施工。
This article introduced the variable cross section liner dolly design to solve the tapered long-span lining construction of JiaHua-DaPing tunnel in ChongQing.
该研究结论可为类似条件下特大断面大跨度隧道设计施工和现场监测提供借鉴与参考。
The experience and conclusions presented can be used as reference in the design, construction and site monitoring of similar tunnels.
对于高速铁路大断面黄土隧道严格的设计计算而言，黄土隧道围岩的弹性抗力系数、变形模量和压缩模量十分重要。
Elastic resistant coefficient, deformation and compressive moduli of surrounding rock in large-section loess tunnel are very important for design of tunnel.
④对于浅埋大断面大跨度连拱隧道，应及早施作二衬，封闭成环，以改善结构受力。
The secondary support structure and the enclosing of the lining must be established in time to improve the performance of the lining.
④对于浅埋大断面大跨度连拱隧道，应及早施作二衬，封闭成环，以改善结构受力。
The secondary support structure and the enclosing of the lining must be established in time to improve the performance of the lining.
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