A reinforced concrete underground structure that houses telephone cables, electric wires, gas pipes, and water and sewer pipes (including industrial water). A standard utility tunnel has enough space inside for people to enter and exit to inspect, expand, and repair the pipes and lines housed therein. The use of a road for purposes other than traffic is called occupation, and facilities for that purpose are called occupied structures. Utility poles, post boxes, and telephone booths are aboveground occupied structures, while water and sewer pipes, gas pipes, telephone cables, and electric wires are underground occupied structures. Underground occupied structures require the road surface to be dug up for new construction, expansion, and maintenance, and each time this is done, it becomes a major obstacle to today's increasing road traffic and is quite dangerous, so efforts are being made to house these underground occupied structures together in utility tunnels. In 1963, the "Special Measures Act on the Construction of Utility Tunnels" (Act No. 810 of 1963) was promulgated, and roads where utility tunnels should be installed were designated, and construction and installation are underway. [Kazuhiro Yoshikawa] Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
鉄筋コンクリート製の地下構造物で、電話ケーブル、電線、ガス管、上下水道管(工業用水道を含む)をいっしょに収容する。標準的な形の共同溝は、内部に人が出入りして、収容した管・線の点検、増設、補修などができる程度の空間をもった構造である。道路を交通以外の目的で使用することを占有といい、そのための施設を占用工作物という。電柱、郵便ポスト、電話ボックスなどは地上の占用工作物であり、上下水道管、ガス管、電話ケーブル、電線などは地下の占用工作物である。地下の占用工作物は新設、増設、保守などのため路面を掘り返す必要があり、そのたびに今日の増大する道路交通に対し大きな障害となり、危険も少なくないので、これらの地下占用工作物をまとめて共同溝に収容するための努力が払われている。1963年に「共同溝の整備等に関する特別措置法」(昭和38年法律810号)が公布され、共同溝を整備すべき道路の指定がなされ、建設、整備が進められている。 [吉川和広] 出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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