Field Monitoring and Numerical Simulation Research on Earth Pressure of Sink Construction in Soft Ground Layer

Abstract

Through the on-site monitoring method, the change of soil pressure in the sinking process of circular sink of pipe jacking project is analysed and studied, and combined with the finite element numerical simulation method, the distribution pattern of soil pressure is compared and analysed. The results show that: with the increase of sinking depth, the shape of earth pressure curve at each point along the height of the sink gradually changes from a spoon shape to a bimodal shape, and the maximum point of earth pressure is located at a certain height from the foot of the blade; the earth pressure on one point of the outer wall of the sink increases with the increase of depth, and the comparative analysis at specific depths shows that the simulated values and the monitored values are more consistent, and the two are between the active earth pressure and the static earth pressure, gradually approaching to the active earth pressure with the increase of depth. Gradually close to the active earth pressure.