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Publications tagged with [primary support]

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<p>This Geoguide presents a recommended standard of good practice for rock cavern application and design in Hong Kong. The contents of this guide are derived from Scandinavian practice with suitable modifications for application in Hong Kong.</p>
Reference: Geotechnical Engineering Office, Civil Engineering Department, The Government of the Hong Kong, 1998
<p>For professional tunnel engineers, for whom money and time are in short supply particularly in early stages of a project, this paper critically assesses what works best with the RMR system, today 40 years after its development and extensive accumulated ...
Reference: RAPID EXCAVATION & TUNNELING CONFERENCE, June 2013
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 ...
Reference: ACTA GEOTECHNICA SLOVENICA, 2011/2
The paper demonstrates the application of a hypoplastic model in class A predictions of a NATM tunnel in an urban environment. The tunnel, excavated in a stiff clay, is 14 m wide with 6 m to 21 m of overburden thickness. The constitutive model was calibrated ...
<p>Tunneling challenges include difficult ground conditions, low rock cover, the presence of historic buildings along the alignment, and the large tunnel span, ranging from approximately 50 to 65 feet. Three mined tunnel construction methods were evaluated: ...
Reference: Rapid Excavation and Tunneling Conference (RETC) Proceedings, 2007
The Bolu Tunnels lie along Trans European Motorway (TEM) which is connecting Eastern Europe with the Middle East. The tunnels are approximately 3.0 km long, 40 m apart and have excavated cross sections more than 200 m2. In construction, New Austrian Tunneling ...
Reference: "THE GRADUATE SCHOOL OF NATURAL AND APPLIED SCIENCES OF MIDDLE EAST TECHNICAL UNIVERSITY, 2006"
 
This manual provides technical criteria and guidance for the planning, design, and construction of tunnels and shafts in rock for civil works projects. Specific areas covered include geological and geotechnical explorations required, construction of tunnels ...
Reference: EM 1110-2-2901
The paper presents the method for design of primary roof support for the large todoidal cavern constructed with 7m of rock cover beneath Sydney's Royal Botanic Gardens. Design of rock reinforcement using a combination of fully grouted rock dowels.
Reference: Tunneling and Underground Space Technology, Vol 9 No. 2, pp 201-207, 1994
 
<p>This second report by the ITA Working Group on General Approaches to the Design of Tunnels presents international design procedures for tunnels. In most tunnelling projects, the ground actively participates in providing stability to the opening. Therefore, ...
Reference: Tunnelling and Underground Space Technology Vol3, No3 1988
<p>This paper provides an overview of a methodology being used by tunnelling experts, which captures the three-dimensional essentials of tunnel behavior with two-dimensional analysis tools. The methodology allows support designers to start off with reasonable ...