Based on the practical engineering of Dinghuaimen Tunnel in Nanjing,the cumulative probability distri-bution function of spatial variability of the thickness of sensitive strata was obtained through statistical analysis with the consideration of the coupling effect of different water pressures,and the differential deformation and internal force variation rule of the tunnel in the spatial variability stratum of the south and north lines were revealed.It is found that the vertical displacement of the segment vault is increased with the increase of the cumulative probability of the thickness of the fine sand stratum and the water pressure around the tunnel.With the increase of the cumula-tive probability of the thickness of the overlying silty clay and silty sand layer,the maximum horizontal displace-ment of the segment is increased.On the whole,the spatial variability of soil layer thickness has a great impact on the displacement,fault amount and internal force of the tunnel.Different spatial variability has a different influence on the safety of the tunnel,which should be paid attention to.If the traditional method is adopted in the design,the risk cannot be predicted,and the design has certain hidden dangers.
关键词
空间变异性/数值模拟/差异变形/水下隧道/累积概率
Key words
spatial variability/numerical simulation/differential deformation/underwater tunnel/cumutative probability
维普
万方数据