<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>In this paper, ground movement in a highly populated region of Iran&rsquo;s capital city, Tehran, induced by excavation and construction of 7 the line of Tehran subway has been investigated. It was aimed to analyse the ground displacements and surface settlement ...

<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>Monitoring the deformations of subway tunnels in soft ground is a principal means for selecting the appropriate excavation and support methods in the design. In this paper, briefly describes the basic deformation monitoring requirements, analyzes the tunnel ...

This paper describes the method used for excavating the upper 33m of emergency access shaft E2 for the underground single track tunnel running between Park and Rosebank station of the Gautrain Rapid Rail System. The soil was decomposed shale and diabase from ...

<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>In shield tunneling, the excavation stability is very important. The balance pressure which supports the work face is offered by the the mucks in the earth chamber. The ideal supporting pressure on the excavation face is trapezoidal. In fact, the pressure ...

<p>The increased use of underground space for transportation systems and the increasing complexity and constraints of constructing and maintaining above ground transportation infrastructure have prompted the need to develop this technical manual. This FHWA ...

<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 ...