沉管隧道复合式路面结构设计指标研究

Research on Design Index of Composite Pavement Structure of Immersed Tube Tunnel

文章针对沉管隧道复合式路面既有设计指标存在的不足,建立沉管隧道复合式路面结构三维有限元模型,建立并分析层间剪切指标、管节接缝位置拉应力指标的适用性。结果表明:沉管隧道复合式路面结构设计中需对管节及节段接缝处进行专门处治,严格控制轴向位移影响,并采用管节接缝位置沥青层拉应力指标进行结构验算。

To overcome the shortcomings of indexes index for composite pavement structural design of immersed tunnel,a three-dimensional finite element model of composite pavement structure of immersed tunnel was established.Then an interlayer shear index and a tensile stress index at the joints between tubes were put forward and their applicability were analyzed.The results show that in the structural design of composite pavement of immersed tunnel,special treatments should be carried out at the joints between tubes or segments to lower the effect of axial displacement.And the tensile stress index at the joints between tubes are advised to be used for the checking computation of composite pavement structure.