Abstract Compared with the bottom-up method, which is widely used in the construction of shallow, medium and small foundation pits, the top-down method is more complex but has obvious advantages in controlling structural performance and deformation, which contribute to the safety of construction of deep and large foundation pits. Using the receiving shaft on the south line of the river-crossing large-diameter shield tunnel on Nanhu Road of Changsha City as an example, this paper compares and analyzes the forces applied on shafts constructed by the bottom-up and top-down methods, indicating that it's better to choose the top-down method for the working shaft construction of large-diameter shield tunnels.
Abstract：
Compared with the bottom-up method, which is widely used in the construction of shallow, medium and small foundation pits, the top-down method is more complex but has obvious advantages in controlling structural performance and deformation, which contribute to the safety of construction of deep and large foundation pits. Using the receiving shaft on the south line of the river-crossing large-diameter shield tunnel on Nanhu Road of Changsha City as an example, this paper compares and analyzes the forces applied on shafts constructed by the bottom-up and top-down methods, indicating that it's better to choose the top-down method for the working shaft construction of large-diameter shield tunnels.
.Comparison of Forces Applied on the Working Shafts of Large-Diameter Shield Tunnels by the Bottom-Up and Top-Down Methods[J] MODERN TUNNELLING TECHNOLOGY, 2015,V52(5): 158-164
2015, Vol. 52 