Analysis on the Response of Ground Surface Settlement for a Metro Station during Construction Using the Pile-Beam-Arch (PBA) Method Subjected to Pore Pressure

A simple approach to predict the settlement of ground surface during the construction of metro tunneling using pile-beam-arch (PBA) method, subjected to pore pressure is presented. As to the analysis on the response of a single pile installed beneath the tunnel, a softening nonlinear model was adopted to predict the relationship between unit skin friction and pile-soil relative displacement developed along the pile-soil interface and a bilinear base load-displacement model was used to predict the relationship developed at the pile end. To analyze the settlement of ground surface during the construction of metro tunneling using PBA method, a highly effective iterative computer program was developed. In order to demonstrate the effectiveness and accuracy of the proposed simple method in this paper, the result is compared with one well-instrumented previous test. The proposed simple analytical approach is economical and efficient, and suitable for the analysis of the settlement of ground surface during the construction of metro tunneling using pile-beam-arch (PBA) method subjected to pore pressure.