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隧道上浮问题是盾构水域下浅覆土掘进时所面临的一个重要课题。本文针对某过江隧道江中浅埋段的工程地质条件,建立了隧道上浮计算模型,对江中浅埋段的隧道稳定性进行了数值模拟计算,研究分析了隧道承受上浮力后江底变形及隧道内力的变化情况,得出了一定的规律,以期为后期隧道施工提供参考。
The problem of tunnel flooding is an important issue faced by shallow overburden excavation under shield waters. In this paper, a calculation model for tunnel uplift is established for the engineering geological conditions of a shallow middle section of a river tunnel. The numerical simulation of the tunnel stability in the shallow middle section of the river is carried out. The deformation of the tunnel bottom after undergoing buoyancy is analyzed And the change of the internal force of the tunnel, we got some rules to provide a reference for the later tunnel construction.