Prediction for the surface settlement of double-track subway tunnels for shallow buried loess based on peck formula

In the process of constructing double-track subway tunnels in shallow buried loess areas, interaction is significantly influenced by net distance and cross-section size, which challenging to control surface settlement. Therefore, settlement prediction essential while areas. The paper analyzed law areas through theoretical research numerical simulation. results show that with decrease distance, superimposed curve was double V shape - W single shape. When shape, Peck formula used calculate single-track tunnel, then obtain final curve. based on formula, for predicting suitable symmetry asymmetry established. ratio area were defined, considering tunnel’s interaction, value position maximum corrected. Then tests carried out 16 times different ratios ratios, determine parameters increments offsets regarding ratio. Finally, two engineering conducted verifying rationality applicability exhibited formula. served Which can reduce construction risks assure safety buildings above ground.