Phased calculation of stresses and displacements due to tunnelling the Botlek Railway Tunnel in the Netherlands

摘要

In the Netherlands two pilot projects, The Second Heinenoord Tunnel and the Botlek Railway Tunnel, for tunnelling in soft soil are almost completed. Under authority of the Centre for Underground Construction (COB; Gouda) those projects were extensively monitored. In this abstract, a phased numerical analysis and modelling of stresses and displacements due to tunnelling at the Botlek Railway Tunnel will be discussed, including a finite element model to predict the settlements due to tail void grouting. In six cross sections the settlements on the surface together with deformations along a vertical line were measured in the underground. For cross section MQ4 an extensive set of predictions was made. The results are compared with the measurements which followed up the predictions.