<p>In tunneling, it is very important to select the correct tunneling machines. Choosing a wrong method may be very costly to the company. There are many parameters affecting the decision stage of selection of the tunneling machine. Geology ...

<p>The main purpose of this study was to provide a three-dimensional numerical model which would allow to show the influence of the constitutive model of the ground on the tunnel lining behaviour and displacement field surrounding the tunnel. Most of the processes ...

<p>A case study associated with shield-machine bored tunnels in sand is presented in this paper. Observations show that driving the first bored tunnel resulted in up to 10 mm of surface settlement, and the ground between two tunnels seems to have been affected ...

<p>This paper introduces the method for analyzing settlement data of tunnel in soft soil. The method is applied to the settlement monitoring analysis of some tunnels across the river. In the case study, the longterm monitoring data for shield tunnel settlement ...

<p>The paper discusses the geodynamic challenges and technical countermeasures in the shield tunnel projects passing under an existing railway line, especially for soft ground conditions. Three main issues needed to be solved by the engineering community: ...

<p>Soft ground tunneling, in urban areas are generally bored using pressurized TBM. Tunnel design involves the need to revalue the classical concepts of deformation response to the excavation and the control priorities, focalized on face and cavity, loose ...

<p>Poor geological conditions are often encountered during underground construction in urban areas. Additionally, buildings, underground infrastructures and other facilities are more densely situated along or under the streets of a city or town. Changes to ...

<p>Several tunnel projects under very high groundwater heads have been started recently or are currently under design, such as the Hallands&aring;s tunnel in Sweden (up to 13 bar), the Brightwater project in Seattle (7 bar) and Lake Mead Intake No. 3, Las ...

<p>The construction of underground tunnels in soft ground in urban areas involves the potential for ground movements caused by the tunnelling to affect existing surface structures. Masonry structures are at particular risk of crack damage. Conventional empirical ...

This paper describes numerical analyses of multiple tunnelling undertaken using the commercial finite element software Plaxis. The aim of the study is to improve prediction of minimum interaction distance between multiple driven tunnels at shallow depths in ...