In the past few decades, the number of tunnels constructed next to an existing tunnel has
been gradually increasing in order to accommodate infrastructure needs in congested urban …

Great attention must be paid to the safety and serviceability of existing tunnels when new
tunnels are constructed nearby in soft soils. In this study, the influence of pipe-jacking …

With the expansion of underground space networks, new tunnels especially large-diameter
shields under-crossing existing tunnels have been commonly practiced. To obtain a better …

The impact of twin shields tunneling undercrossing with an oblique angle on the existing
tunnels is complicated and still lacks of understanding. This paper investigated the …

In recent years, with the rapid increase of urban subway lines, crossing engineering has
become another complex problem of modern tunnel construction techniques, and especially …

Due to the increasing development of infrastructure systems in urban areas of China, many
subway tunnels are being constructed near existing subway lines. Shield tunneling …

Tunnelling in the dense urban areas frequently results in over-crossing or bypassing the
existing tunnels. It is obvious that the over-crossing tunnelling will adversely affect and even …

This paper examines the effect that tunnel size, depth and volume loss have on greenfield
soil displacements above tunnels in sandy ground. The results of a series of plane-strain …

This paper presented a case study on the deformation and stress characteristics of twin
tunnels induced by close distance earth pressure balance shield (EPBS) under-crossing in …

This paper presents a case of closely spaced twin tunnels excavated beneath other closely
spaced existing twin tunnels in Bei**g, China. The existing twin tunnels were previously …