TerraSAR-X satellite SAR (Synthetic Aperture Radar) scenes have been analysed using Persistent Scatter Interferometry (PSI) approach to monitor a tunnelling process in Düsseldorf, Germany. The aim of this work is to detect the deformation of ground surface and structures above the tunnelling line during the tunnel excavation. In this study, 5 the PSI approach integrated in the open source softw...

Mechanized excavation of tunnels with Earth Pressure Balance-Tunnel Boring Machines requires the use foaming agents. The latter contain anionic surfactant sodium lauryl ether sulphate (SLES) as main compound. re-use a by-product excavated soil containing agents (spoil material) can pose risk for and particularly aquatic ecosystems if they are close to spoil material final destination site. This...

The reliability of disc cutters has a significant influence on the safety and working efficiency tunnel boring machines (TBMs). To investigate under different geological operational conditions, we conducted series novel rolling cutting tests intact jointed sandstone blocks using dip angles interlayers. Different normal forces rotational speeds cutterhead were also applied during experiment. A e...

tunnelling through cities underlain by soft soil, commonly associated with soil movement around the tunnels and subsequent surface settlement. the predication of ground movement during the tunnelling and optimum support pressure could be based on analytical, empirical or the numerical methods. the commonly used earth pressure balance (epb) tunneling machines, uses the excavated soil in a pressu...

The development and extension of large cities induced a need for shallow tunnel in soft ground of building areas. Estimation of ground settlement caused by the tunnel excavation is important engineering point. In this paper, prediction of surface subsidence caused by tunneling in one section of seventh line of Tehran subway is considered. On the basis of studied geotechnical conditions of the r...