Abstract Taking an urban underground bored road tunnel as an example, a three-dimensional numerical simula? tion of dynamic excavation using the CRD and cross diaphragm with step methods is conducted based on the finiteelement theory. A contrastive analysis of the deformation and force characteristics of the rock mass and support structure of the tunnel constructed by the above two methods is carried out and an optimization of the cross diaphragm with step method is performed based on the results of numerical calculations. A comparison between the two construction methods is performed in terms of the advantages and disadvantages regarding construction safety, quality, progress and cost. The research and practice indicate that the two construction methods can both meet the requirements for rock mass and support structure stability, but the cross diaphragm with step method is superior to the CRD method in respect to construction progress and cost and produces better economic benefits in practice.
Abstract：
Taking an urban underground bored road tunnel as an example, a three-dimensional numerical simula? tion of dynamic excavation using the CRD and cross diaphragm with step methods is conducted based on the finiteelement theory. A contrastive analysis of the deformation and force characteristics of the rock mass and support structure of the tunnel constructed by the above two methods is carried out and an optimization of the cross diaphragm with step method is performed based on the results of numerical calculations. A comparison between the two construction methods is performed in terms of the advantages and disadvantages regarding construction safety, quality, progress and cost. The research and practice indicate that the two construction methods can both meet the requirements for rock mass and support structure stability, but the cross diaphragm with step method is superior to the CRD method in respect to construction progress and cost and produces better economic benefits in practice.
.Optimization and Application of the Shallow-Buried Construction Method for an Urban Underground Road Tunnel[J] MODERN TUNNELLING TECHNOLOGY, 2017,V54(5): 209-216
2017, Vol. 54 