Instrumentation and monitoring are an essential part of current tunnelling practice. For safe and economical tunnelling in sensitive construction environments a continuous adaptation of excavation and support design is required so that input parameters can be revised when the predictions deviate from measured values.
In addition,...
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Instrumentation and monitoring are an essential part of current tunnelling practice. For safe and economical tunnelling in sensitive construction environments a continuous adaptation of excavation and support design is required so that input parameters can be revised when the predictions deviate from measured values. In addition, systematic monitoring results can provide valuable information pertaining to imminent collapse, thus, making it possible to control the tunnel stability by providing proper countermeasures. The recommendation focuses on the contribution of monitoring to the successful completion of a tunnelling project, through real time usage of monitoring information as part of the construction process. It should be read in conjunction with the ITA publication Guidelines for Tunnelling Risk Assessment by Eskesen et al. (2004), as this approach can be viewed as one way of mitigating risks involved in tunnel construction. A special emphasis is given to the use of absolute disp
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From vion.olivier
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Pub. on Jan. 18th 2012
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During construction and refurbishment work in tunnels, adequate ventilation must be provided to reduce risks to health from atmospheric contaminants or lack of oxygen.
Ventilation can also be used as a means of cooling the tunnel environment. It is important that the components of the ventilation system should not themselves present...
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During construction and refurbishment work in tunnels, adequate ventilation must be provided to reduce risks to health from atmospheric contaminants or lack of oxygen. Ventilation can also be used as a means of cooling the tunnel environment. It is important that the components of the ventilation system should not themselves present additional risks to those building the tunnels. This guidance gives recommendations for the materials to be used in such ducts and their installation and maintenance
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From vion.olivier
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Pub. on Jan. 18th 2012
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TUNNELLING IN URBAN AREAS AND EFFECTS ON INFRASTRUCTURE
Advances in research and practice.
Robert MAIR
From vion.olivier
This document identifies the key contractual practice areas the ITA believes are fundamental for ensuring the success of subsurface construction projects.
The reason that this document has been prepared is because existing standard forms of construction guidelines and contracts do not adequately deal with the particularities of the...
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This document identifies the key contractual practice areas the ITA believes are fundamental for ensuring the success of subsurface construction projects. The reason that this document has been prepared is because existing standard forms of construction guidelines and contracts do not adequately deal with the particularities of the subsurface environment. The ITA believes that the application of this framework will enhance the possibility of achieving the project objectives for all stakeholders. This publication does not specify how each subject area should be resolved, for that is almost certainly a matter peculiar to each project – but recommends that the timely and appropriate consideration of all the matters raised in this publication is essential for the successful subsurface project delivery.
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From vion.olivier
Tribune, the magazine of ITA is published once a year. The issue 35 presents a focus on tunnelling works in Finland.
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Pub. on July 25th 2011
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Tribune, the magazine of ITA is published once a year. The issue 34 presents a focus on tunnelling works in Canada.
From vion.olivier
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Pub. on May 26th 2010
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The International Tunnelling and Underground Space Association (ITA)
Working Group 12 on Sprayed Concrete Use decided, in its meeting
held in Durban in May 2000, to produce a State-of-the-Art Report about
the current states of shotcrete technology in different countries. This
report is the result of that task. This is a revised...
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The International Tunnelling and Underground Space Association (ITA) Working Group 12 on Sprayed Concrete Use decided, in its meeting held in Durban in May 2000, to produce a State-of-the-Art Report about the current states of shotcrete technology in different countries. This report is the result of that task. This is a revised version of the report first published in November 2007. This printed report is the first part of the full report. It contains the summary prepared by the Working Group itself from the contributions of the ITA Member Nations. These contributions can be found on the ITA web site (www.ita-aites.org). The report has been produced by compiling information requested to the ITA National Groups under the coordination of Knut Garshol, Animateur of the Working Group 12 during the period when it was produced. ITA would like to acknowledge all those people who have been participating in the work of Working Group 12 during these years of preparation of the rep
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From vion.olivier
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Pub. on May 26th 2010
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The International Tunnelling and Underground Space Association Working
Group 15 – Underground Works and the Environment has prepared this
report to illustrate the many ways that tunnels and underground space
have been used to reduce the effect on the environment, for sustainable
development reasons, for the construction of...
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The International Tunnelling and Underground Space Association Working Group 15 – Underground Works and the Environment has prepared this report to illustrate the many ways that tunnels and underground space have been used to reduce the effect on the environment, for sustainable development reasons, for the construction of important infrastructure. The report illustrates over 100 tunnel and underground space projects on all five continents and covering a broad spectrum of the Association’s Member Nations. The projects illustrate the opportunities and benefits of going underground to reduce the environmental impact on Society. Highway projects cut a wide swathe through urban and rural areas and can be a scar on the horizon. By going underground major improvements can be achieved to minimise the effect on the environment. The highway projects represented 43% of the projects from 17 Member Nations and illustrate how bored, cut and cover, and immersed tunnels can be construct
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Pub. on May 26th 2010
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Recent projects of very long railway tunnels (from 20 to 50 km or more)
at great depth (thousand meters and more) have only emphasized what
has been recognized for many years with existing long railway and
road tunnels (from 5 to 15 km or more): the work is a complex civil
engineering system, to be designed under uncertain...
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Recent projects of very long railway tunnels (from 20 to 50 km or more) at great depth (thousand meters and more) have only emphasized what has been recognized for many years with existing long railway and road tunnels (from 5 to 15 km or more): the work is a complex civil engineering system, to be designed under uncertain conditions with stringent requirements for safety during construction and operation. Long and deep tunnels are consequently characterized by extreme conditions for risk assessment and risk management during the lifetime of the project. This refers to the early planning and ground investigations; the design, including the intermediate access shafts or adits; the rescue or multi-purpose chambers; and other safety features for construction and operation. This report is intended to serve the international tunnelling community as a guideline for planning, design, construction and operation of long and deep tunnels. It recommends an approach or a methodology
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From vion.olivier
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Pub. on May 26th 2010
Pages: 32
Views: 19
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TUNNELS AND UNDERGROUND WORKS
FOR HYDROPOWER PROJECTS
Lessons learned in home country and from projects worldwide.
Einar Broch
APRIL 2010N° ISBN : 978-2-9700624-4-8
Muir Wood Lecture 2010
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Pub. on May 26th 2010
Pages: 20
Views: 57
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