Underground stalk industrial method.

Name.：Underground stalk industrial method. ( SUBTERRANEAN STEM SHIELD SYSTEM )
Industrial method.／Rough classification.：Shield tunneling.
Industrial method.／Detailed classification.：Underground stak industrial method.
Characteristic.：Industrial method by which the start shaft of shield for the divergence tunnel is mae unnecesary.
Scale.：
Special mention matter.：
　Because the space in the ground and the underground is made to crowd more and more as the society develops, and space by which the start shaft for the shield is constructed has been limited.
　Then, the industrial method by which the start shaft of the shield for the divergence tunnel is made unnecessary is divergence industrial method of Nishimatsu Construction Co., Ltd., and, in a word, " Underground stalk industrial method" ( SUBTERRANEAN STEM SHIELD SYSTEM ).
　This method of construction is an industrial method by which the divergence shield is started in the shield tunnel while constructing. In addition, this industrial method is an excellent industrial method to be able to achieve shortening a whole term of works and economy against the tunnel construction witj the divergence structure such as an electric power, a communication, upper and lower water service, a gas, a heat supply, diving channel, an underground river, and the report passage in the road and the railway.
  1. Because the divergence shield is sent in the main line shield, the start shaft for the divergence shield is unnecessary.
  2. As for the divergence shield, even the divergence point is built into the main line shield.
  3. As for the divergence shield and the main line shield, it is possible to do the simultaneous construction and term of works can be shortend.
  4. As for the divergence shield start angle, the diagonal or the right angle is possible.
  5. After the divergence shield starts, the main line shield is this diameter.
  6. As for the shape of the main line shield and divergence shield, the circle or the rectangle is possible.
  7. The divergence tunnels of the number can be constructed by building the divergence shield in the double-track line into the main line shield.
Offer of material.：Nishimatsu Construction Co., Ltd../ Divergence shield tunneling. " Underground stalk industrial method."
Contents.
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