Discussion on tunnel bottom excavation method and lining deformation monitoring scheme of operating tunnel

Assessment of Tunnel Excavation on Surface Settlement

The expansion of underground structures is important in urban areas with high population density. In most large cities in the world, urban development is spreading along the structures. These structures are generally located at shallow depth; therefore study of shallow tunnels in urban areas is critical for development. During the excavation of tunnels in urban areas, creating the asymmetric se...

Long-Term Deformation Monitoring of Metro-Tunnel Airshaft Excavation during Construction Stage

The project of Hangzhou Metro Line 1 is the first metro line of the urban rapid rail transit system in Hangzhou, China, which is one of the largest municipal projects of Hangzhou and is being constructed commencing fromMarch 28, 2007 and expected to be completed by October 1, 2012. This metro line has a total length of 48 km and 34 stations, connecting Hangzhou downtown with the suburban area o...

Assessment of Soil cohesion of Soils on Tunnel Excavation

Excess pore pressure under seismic loadings has always been a main concern in geotechnical engineering practices. Undergoing the phenomenon in a soil can cause the effective stress and hence the shear strength of the soil to decrease considerably and large deformations happen in the area. Generally, increasing the pore pressure occurs under the undrained condition. If it can be formed the drain...

Finite Element Method Analysis of Influence on Subway Tunnel Adjacent to Excavation by Excavation Construction

The interaction influence on subway tunnels adjacent to foundation excavation was produced by excavation construction, and it is great significance for the correct assessment of its size and influence on the safety of subway operation. Based on the foundation excavation project, some typical foundation excavation profiles are selected, the calculation and analysis on additional settlement and h...

Finite Element Analysis for the Problem of Tunnel Excavation Successive Phases and Lining Mounting