Case studies of Advanced Construction and Demolition waste(CDW)
Recycling initiatives and technologies In JAPANAffiliation
Location
Position:
Name/SurnameTokyo Outer Ring Road Office, Kanto Regional Development Bureau,
Ministry of Land, Infrastructure, Transport and Tourism (MLIT),Tokyo, JapanTE Bldg. 7F, 5-5-10 Yoga, Setagaya-ku, Tokyo 158-8580 Japane-mailTitle
Themeclassification

Policy on excavated soil generated Tokyo Outer Ring Road
(Kanetsu～～ Tomei) construction〇

Prevention
Re-useRecycleReduce Co2
LegacyBusiness to overseas

Technology
development stage〇Etc.
Practical use
Scheduled to be put into practical use by 2020
Scheduled to be put into practical use after 2020

Specific content- The Tokyo Outer Ring Road Tunnel Excavated Soil Conference
chaired by Honorary Professor Kamon of Kyoto University developed a“Manual to Manage Soil Excavated during Tokyo Outer Ring
Tunneling,” summarizing the policies for management of shield
excavated soil. And, we plan to make effective use of shield tunnel
generated soil of about 20,000 m 3 per day.

Appeal point- Shield tunnel generated soil from the muddy pressure shield
construction method has been often handled as construction sludge(industrial waste) in many cases.
-In this project, by devise shield excavation method and additives etc.
taking advantage of the characteristics of the hard drilling strata
distributed in the deep underground, we effectively utilize shielded
tunnel generated soil as excavated soil for embankment material etc.

-73-Policy on excavated soil generated Tokyo Outer Ring Road (Kanetsu～～Tomei) construction.
Yoshio SHIBATA1, Kenji KATO2 , and Junichi SUGII3
1General Manager; Tokyo Outer Ring Road Office, Kanto Regional Development Bureau,
Ministry of Land, Infrastructure, Transport and Tourism (MLIT), Tokyo, Japan
2General Manager; Tokyo Gaikan Construction Office, Kanto Regional Head Branch,
East Nippon Expressway Company Limited Tokyo, Japan3Director; Tokyo Construction Office, Tokyo Branch,Central Nippon Expressway Company Limited, Tokyo, Japan

ABSTRACT: This paper addresses the policy on excavated soil generated Tokyo Outer Ring Road (Kanetsu～Tomei)construction by shield tunneling. From Tokyo Outer Ring Road (Kanetsu～Tomei) construction
site, a maximum of 20,000 m 3 of excavated soil per day is generated at maximum.so it is necessary toconsider proper management of such a huge amount of soils .

1. INTRODUCTION
Three metropolitan ring roads play vital role as a social capital to support economic activities and daily
life of Tokyo, a heart of Japan, while contributing to mitigation of chronic traffic congestion and toenvironmental improvement of central Tokyo.
One of these ring roads, Tokyo Outer Ring Road, has the length of about 85 km, connecting, like a loop,
the areas at about 15 km from central Tokyo. For the dedicated motorway portion (the expressway), thesection of about 49 km has been opened for service up to now, which runs from the Oizumi Junction
connecting to Kanetsu Expressway and the Takaya Interchange connecting to Higashi Kanto Expressway.

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For the section of about 16 km (or the Tokyo Outer Ring) from Kanetsu Expressway to Tomei
Expressway, Ministry of Land, Infrastructure, Transport and Tourism (MLIT), East Nippon Expressway
Company Limited, and Central Nippon Expressway Company Limited are jointly undertaking the project.

Tokyo Outer Ring Road
(Kanetsu～～Tomei)

Tokyo OuterRing Road

HanedaAirportFig. 1 Outlines of the metropolitan area three-ring road2-75-

2. ROAD CONSTRUCTION
The Section runs mostly through the deep underground tunnel structure, the greatest shield tunnel ofJapan with three lanes each way, having the diameter of about 16 m.

Fig. 2 Outline of the plan of the Tokyo Outer Ring (Kanetsu ~ Tomei )Photo.1 Shielded machine with a diameter of about 16 m

3-76-3. POLICY ON EXCAVATED SOIL GENERATED SHIELD TUNNEL CONSTRUCTION
A total of four 16-m diameter shield machines were employed for tunnel excavation; two northbound andtwo southbound respectively from the Oizumi Shaft and the Tomei Shaft. These shield machines produced
excavated soil of maximum about 20,000 m3 daily.
Since large amount of soil generated within short periods is to be removed, as needed, to the outside of
the work site, the Tokyo Outer Ring Road Tunnel Excavated Soil Conference chaired by Honorary
Professor Kamon of Kyoto University developed a “Manual to Manage Soil Excavated during Tokyo Outer
Ring Tunneling,” summarizing the policies for management of shield excavated soil.
This manual summarizes the flow of handling and management of shield excavated soil, temporarystorage method, judgement method, transportation control, the concept of additives mixing, etc. The manualdescribes the policies for effective and efficient utilization of shield excavated soil for other projects outside
the work site.
For soil excavated with mud slurry shield, the project is intended basically for effective utilization ofsuch soil for embankment, etc. as soil generated from construction, by exploiting merits of hard excavation
formation distributed in the deep underground and by improving the shield method and additives. In orderto enable effective utilization of large amount of construction byproducts as invaluable resources, efforts aredone to achieve the objective through promotion of discussions with various receiving parties whilereferring to this manual.

Stock yard (judgment work)

Generated site

Usage site

Usage site A
Selection of usage site

Testing and analysis

Collection of test / analysis
sampleStockTransportation

Storage by hopper etc.

Modification (additionof solidifying material)
Conveyance(belt conveyor, etc.)

Excavation

Transportation

Usage site B

Usage site C

Integrated construction system ofTokyo outer ring roadFig. 3 Flow of management of shield generated soil
Excerpt from “Manual to Manage Soil Excavated during Tokyo Outer Ring Tunneling,”

4-77-4. CONCLUSIONS
Transport of shield excavated soil and transport of materials and equipment of other projects are expected
to cause congestion. Besides, it is important to ensure traceability of shield excavated soil from the sourceof generation to the destination. In this context, the transport management is currently under consideration.
The Tokyo Outer Ring Road is a project requiring highly-developed technical power mainly onunderground structures. With the aim of making this project a model in large cities, we will proceed withthe project with cooperation extended from authorities concerned, experts, and local residents while paying
due attention on the safety and surrounding environment.

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