Abstract：Relying on high-speed Lianhuo through special Wenxiang Zhengxi passenger tunnel rural expansion project, based on the strength reduction method, the influence of the excavation at the top of the tunnel under different initial burial depth is studied, and the verification is carried out with the actual engineering. The results show: with the increase of the initial burial depth, the safety factor of the tunnels is decreasing as a whole. When the depth is shallow, the safety factor of the tunnel is greatly affected by the initial depth. With the increase of the buried depth, the influence of the initial burial depth is getting smaller and smaller, when the filling height is not more than 10m and the initial burial depth is more than 40m, it can be considered that the initial burial depth has no effect on the tunnel structure. When the depth is more than 80m, the filling height can be considered to have no effect on the tunnel structure. When the excavation height is not more than 10m and the initial burial depth is more than 50m, it can be considered that the initial burial depth has no effect on the tunnel structure. Through the analysis of field test data, the horizontal convergence, orbital settlement and structural stress data of the tunnel affected by the construction of the tunnel and the tunnel are far less than the stipulated allowable value. It can be considered that the construction has no effect on the tunnel. At the same time, it proves the rationality of influence division, it has a guiding significance for similar projects.
仇文革 孙克国 郑强 卢锋. 隧道上方挖填方受初始埋深的影响分区研究[J]. 土木工程学报, 2017, 50(S1): 8-13.
Qiu Wenge Sun Keguo Zheng Qiang Lu Feng. Study on influence division of fill and excavation above tunnel by the initial depth. 土木工程学报, 2017, 50(S1): 8-13.
