Domestic Scan 09 05, Best Practices for Roadway Tunnel Design, Construction, Maintenance, Inspection, and Operations, conducted during August and September 2009, is one of the activities initiated to assist in addressing the need for national tunnel standards ...

<p>The construction of shallow mined tunnels in urban settings is frequently undertaken by use of conventional tunneling methods. In soft ground under shallow cover the construction techniques rely largely on the use of pre-support measures and ground improvement ...

The stability of the excavation face of shallow tunnels excavated in difficult ground conditions is currently a relevant problem in the sector for tunnelling and mining. Even though face-reinforcement interventions with fibreglass dowels have proved to be ...

<p>This paper is dedicated to present criteria and rules for design of metro path including tunnel geometrical sections and choosing parameters, loads applied to tunnels, fundamentals of static and seismic analysis, and primaries of structural design, structural ...

The paper studies the accuracy of 3D finite element predictions of a displacement field induced by NATM tunnelling in stiff clays with high K0 conditions. The studies are applied to the Heathrow express trial tunnel. Two different constitutive models are used ...

<p>This paper develops a novel modelling approach for ventilation flow in tunnels at ambient conditions (i.e. cold flow). The complexity of full CFD models of flow in tunnels or the inaccuracies of simplistic assumptions are avoided by efficiently combining ...

<p>Ras R&rsquo;Mel Moroccan tunnel is a 2.6 km long and 60m² section single track railway tunnel. It was excavated in a complex geological context of highly heterogeneous and highly deformable soft rock. The purpose of this paper is first to describe ...

<p>The City of BuenosAires,Argentina, is expanding it&rsquo;s metro network. Some 13 km of newtunnels have been excavated since 1998 and some 20 km are scheduled for construction in the near future. Many major improvements have been implemmented during these ...

<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>This paper describes how the concrete structure was designed and specified (concrete weight and tolerances) with allowances for the specific geotechnical and hydraulic conditions (water depth, concrete weight and freeboard, water level management in the ...