Civil Engineering Association

Standard Specifications for Tunneling-2006: Shield Tunnels

Abstract
The shield tunneling method has rapidly become popular in Japan as a versatile tunneling method in urban areas and for building infrastructure such as railroads and roads and power supply, communication, water supply and sewerage lines. The first guidelines for the design and construction of shield tunnels in Japan were the "Japanese Guideline for Shield Tunneling" published in 1969. This Guideline formed the basis of the "Japanese Standard for Shield Tunneling", which was enacted in January 1977. After 1977, closed-face type shields were introduced and methods for shield tunneling progressed rapidly with the accumulation of experience through tunneling in congested urban areas and in soft ground. The "Japanese Standard for Shield Tunneling" was also revised three times, in 1986, 1996, and 2000, to keep up with the new developments in tunneling methods. This manual is a faithful translation from the original Japanese of the major topics in the "Standard Specification for Tunneling (Shield Tunnels)". When applying this manual, the following points need to be noted:
1. This manual refers to the closed-face type shield tunneling method as the standard method. This method has been developed in Japan for good performance under various conditions in urban areas.
2. The manual contains no reference to "TBM (tunnel boring machine)".
3. The allowable stress design method is primarily adopted, though the limit state design method is added to complement the allowable stress method.
4. The laws, regulations, and government ministries specified in this manual refer to the country of Japan and apply only when using the shield tunneling method in Japan. When constructing shield tunnels outside Japan, the user must identify and comply with the appropriate corresponding rules, regulations, and ministries of the country where the project is located.
We hope that this English version of this "Standard Specification for Tunneling (Shield Tunnels)" will help spread the remarkable Japanese technology for shield tunneling around the world. Finally, we would like to express our appreciation to all the members of the committee for the enormous time and effort they have devoted to this publication.

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