Research on Ground Settlement Laws of Urban Subway Tunnel Construction Process Based on Earth Pressure Shield

Through the prediction methods such as experience, theoretical analysis and numerical simulation, combined with the measured data, the ground settlement caused by the earth pressure shield construction is analyzed. The analysis results show that the maximum settlement estimated by the prediction method is always higher than the measured settlement value; the curve shape of the Oteo method is more optimized; when the tunnel depth is shallow, the Loganathan-Poulos, Sagaseta, Peck and Verruijt-Booker methods all overestimate the maximum settlement, and the settling troughs given by the Loganathan-Poulos, Sagaseta and Verruijt-Booker methods are wide; the numerical simulation method, which is more effective than the analytical and empirical method, can simulate the construction process effectively. According to the research results, the experience, theoretical analysis and numerical simulation methods have a certain safety reserve space, and these three methords can be used for ground subsidence prediction caused by earth pressure shield construction in soft soil layer.