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It has gone to "Tokyo Tonnericcs" done in Tokyo Shibuya Ward Hatsudai on October 15.
The event after the pattern and the visit end the latter part of the report and "White tunnel" internal is collected. (In the first volume, a pattern "Black tunnel" internal is collected among two events held from entrance in the tunnel. )
In "White tunnel", there was exhibitions of a technology, clean air of the tunnel construction, and the surplus soil recycling, etc. It sums up and it introduces being able to hear the story.
･Special construction method
The Shinjuku Tokyo Metropolitan Expressway center and toroidal lines do not cover going inside lane/circumference lane by one huge *(circle) but :. The section like binoculars connected among two cylinders is done.
Construction is done according to the procedure for changing for a moment because of the shape.
First of all, it digs up two round, cylindrical tunnels that become going inside lane/circumference lane with the shield machine. After that, the soil and gravel are removed between the two tunnels, the wall material drawn up once in addition with the shield machine is removed, and it makes it to the space of the lamplight and the settlement.
The problem occurs here. Because pressure is evenly distributed when it is a state that surrounding geological features are blocked like the form of a cylinder that the shield machine made, it stabilizes.
However, when geological features among are removed, the tunnel is distorted.
Construction will be sped up adding the structure material of the character type of "E" that supports both tunnels to the space made between tunnels to suppress this. Such an industrial method is an unparalleled case in the world.
･Shield machine
It is grater. When easily saying. 
In the house of about three stories in the diameter, the sizes of teeth of one a piece are strapping from Asian elephant's molar.
Library picture: Asian elephant's molar.
It is all digested to exhaust the soil and gravel digging up the bedrock and willingly, and to set the panel of the wall material. The speed is very slowly however.
･Air cleaning and Atsmatiri system
On the space that the road passes, the vehicle exhaust emission is built into the mechanism filtering it by normal air. The size : in a little gym. It seems to schedule this equipment to be installed on the hall part to which we have gone down stairs this time.
A harmful sulfuretted gas and the soot (black powder by which the governor of Tokyo rolled the rose at a press interview) are removed by 95% or more here, and it ventilates it from the chimney of surface of the earth.
The bytalk, after structural Canetai of the main body of the tunnel can be done, this equipment is started constructing. It is serious because it progresses even if the term of works approaches, too.
･Air cleaning and ventilation/exhaust gas system
It is a system of ventilation in the tunnel that synchronizes with the Atsmatiri system above.
Air in the tunnel becomes foul with surprising swiftness if this is not, and it is lost to remain even driving. After that, to the disaster of a fire in the tunnel etc. Nine Shinjuku Tokyo Metropolitan Expressway center and toroidal lines are 9km in the total length, and are set up in the average.
･Surplus soil recycling
A large amount of earth and sand goes out when digging a tunnel. This is argillaceous, there no usage as it is, and becomes industrial waste ,in a word, to garbage. However, there is no abandoned destination, and it costs cost for processing.
This is dehydrated however, processed, it changes into ..froufrou.. ..nontoxic.. Dojou, and the recycling used is advanced to the shore protection and banking. The point was changed from the processing site of paper into the porous quality like ..waste put out.. charcoal. (brand name: Mad killer)
A detailed hole absorbs moisture etc. from an argillaceous surplus soil in Gngn, and it changes it into Sarasara.
The soil thus reborn can promote the plant on this soil, and there is not an element of inclining at acidity and alkalinity either. It is used for the bank protection work of the Suwa lake for instance, and it becomes a playground at the school, and the rice field and the field ..umbrella.. are raised and it becomes the soil of the done foundation being expected such a character.
The soil that went out to construct of the Shinjuku Tokyo Metropolitan Expressway center and toroidal lines seems to be used in the point where it wants the soil for the reclamation such as Koto Ward.
I thought that the cycle divided into the new valuable one met industrial waste that went out of the site of the paper pulp processing by the tunnel construction, and was reasonable and was beautiful.
･Extra. 
Reinforced concrete used on tunnel construction site. The fattest reinforced concrete used for the place where the load hangs is most on woman's arm. It is Tetscatamari heavy for the person who is lifting Ticaratame to say, "Weight comes to the waist".
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