黄土隧道拱顶沉降高分辨率数据分析

High-resolution Data Analysis of Loess Tunnel Vault Settlement

选取黄土隧道初期支护完成后一段时间,通过远程采集拱顶动态下沉数据和环境温度变化数据,对隧道沉降数据予以分析表明:拱顶沉降总趋势符合同类围岩隧道拱顶沉降特征,收敛变形趋于稳定。该类隧道沉降基本稳定后,微小的变形数据显示出和温度存在一定的相关性:一方面,由于静力水准仪液面受温度的影响所致;另一方面,隧道围岩受温度的影响,也产生极微小的变形,但均与热胀冷缩的物理过程有关。

With the vauh-resolution subsidence data and surrounding temperature variation data collected remotely a period after the primary support completed, the analysis of subsidence of the tunnel shows that the total trend of the crown settlement was consistent with similar rock tunnel characteristics. The trend of the convergence deformation was stabilized. After the stable sedimentation, the data shows there was a certain correlation between the slight deformation and the surrounding temperatures. On the one hand, the static water level is affected by temperatures. On the other hand, on the tunnel surrounding rock affected by temperature too, microscopic deformation may also occur; both of them are related with the ex- pansion and contraction of the physical processes.