软岩公路隧道围岩变形影响因素探讨

发布时间：2018-05-28 23:48

本文选题：隧道工程 + 现场监测　；参考：《铁道建筑》2014年01期

【摘要】：以三个不同地区的软岩隧道为工程背景,依据施工现场对拱顶沉降和水平收敛的监测数据,探讨软岩隧道围岩变形的影响因素。研究结果表明:围岩的变形与埋深、断面形式、围岩级别以及围岩岩性密切相关;围岩变形的增量并不一定与隧道的埋深成线性关系;断面形式对围岩变形的影响明显大于施工方法对围岩变形的影响。由于不同地区的地质条件千差万别,岩石岩性和分布特征也可能存在较大差异,这种差异往往对围岩变形起到决定性作用。因而在隧道工程设计和施工阶段,不能完全照搬经验类比法,应依据信息化施工对围岩的稳定性进行监控,进而调整相应的支护参数和施工方法,从而实现施工安全和工程造价利益的最大化。
[Abstract]:Based on the engineering background of soft rock tunnel in three different areas, based on the monitoring data of arch settlement and horizontal convergence in construction site, the influencing factors of surrounding rock deformation of soft rock tunnel are discussed. The results show that the deformation of the surrounding rock is closely related to the depth of the surrounding rock, the form of the section, the grade of the surrounding rock and the lithology of the surrounding rock, and the increment of the deformation of the surrounding rock is not necessarily linearly related to the buried depth of the tunnel. The influence of section form on surrounding rock deformation is obviously greater than that of construction method. Because of the different geological conditions in different regions, there may be great differences in lithology and distribution of rocks, which often play a decisive role in the deformation of surrounding rock. Therefore, in the design and construction stage of tunnel engineering, the experience analogy method can not be completely copied, and the stability of surrounding rock should be monitored according to the information construction, and the corresponding supporting parameters and construction methods should be adjusted. In order to realize the construction safety and project cost benefit maximization.
【作者单位】：安徽交通职业技术学院土木工程系;
【分类号】：U451.2

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