Ashimori Industry Co., Ltd.

Ashimori Kogyo Kabushiki Kaisha

Sanki Engineering Co., Ltd.

Ashimori Engineering Co., Ltd.

Masaru Yamakawa

Isaburo Yagi

Yasuhiro Ueda

Hideo Maruyama

Koji Aso

Fumiaki Tsuchiya

Yukikazu Maemoto

Osamu Ishizuka

Hirofumi Nakatsuka

Yoshifumi Osaka

Takaaki Hirokawa

The object is to provide a construction method of an information-communicable underground pipe whereby communication cables can be readily laid in an underground pipeline having a main pipe and branch pipes branched therefrom thereby allowing the underground pipeline to be used as an information-communicable underground pipe, and to provide a construction structure and a construction member therefor. The construction method of an information-communicable underground pipe comprises inserting a sheath pipe () into an underground pipeline () through a manhole (), the sheath pipe having a main body () formed with an empty room () for installing a communication cable () thereinto and a high-strength low-elongation material element () integrally formed in the main body () along the length of the main body (), and securing the high-strength low-elongation material element () onto the inner wall of said manhole () by applying tension thereon to secure the sheath pipe () in the substantially upper part inside the underground pipeline ().

Method of constructing information correspondence pipe, constructed structure, and construction member

Boring device for lining material in branched portions of lined conduit

Growing community of inventors

Hyogo, Japan

Masaru Yamakawa