Techniques including pre‐grouting, long pipe roof, and parameter optimization were
employed to ensure the safety of loess metro tunnelling under an existing glass building …

The transfer section between the cross passage and the main tunnel is the part that needs to
be paid attention to during the underground excavation construction of the subway. Due to …

To solve stability issues of super large cross-sectional tunnel with greater than 20 m across
and an overall area greater than 314 m2 during excavation, a new technique named cross …

The constant growth of cities has led to a shortage of land in metro areas as a result;
numerous transportation issues must be addressed. The design of underground structures …

The design and construction of a tunnel in urban areas need special considerations.
Usually, the excessive settlement caused by tunnelling during the construction process …

Tunnels are a major underground structure used for transporting passengers, water,
wastewater, etc. Design of a tunnel/twin tunnel requires fixing the spacing between tunnels …

In order to prevent the excessive surface settlement in urban tunnels, especially when the
tunnel overburden is low, either a sequential excavation method (SEM) or soil reinforcement …

In longitudinal ventilation, circulating air is formed in portals for closely spaced twin tunnels,
which causes mixing between the polluted air exhausted from one tunnel and the fresh air …

This study investigates an estimation model of ground surface settlement caused by the
excavation of tunnels with a horseshoe-shaped cross section. The ground surface …

SummaryOne of the problems with NATM tunneling in urban areas is the risk of excessive
surface settlement during excavation operations. For real analysis and detailed study of …