Practical Calculation Method of Diaphragm Wall for Ultra-deep Circular Excavation
If the circumferential stiffness of the circular foundation excavation diaphragm wall is ignored and only treated as a vertical bending component,it will lead to excessive vertical steel reinforcement configuration,causing economic waste and difficulty in lifting.Therefore,a practical two-dimensional incremental elastic foundation beam method is proposed to consider the circumferential stiffness of the circular foundation excavation diaphragm wall.The reduced circumferential stiffness of the diaphragm wall is treated as the internal support stiffness and applied above the excavation surface of the foundation excavation to simulate the excavation of soil layer by layer and the installation of support layer by layer.Compared with the measured engineering data,it has been verified that the calculation results of this method are closer to the measured values,and can effectively reduce the vertical reinforcement ratio of diaphragm walls while ensuring safety.
deep excavationdiaphragm wallincremental calculatiom methodsupport stiffness
NETL
NSTL
万方数据
