外環自動車道 三郷南IC～高谷JCTトンネル防災設備概要について

抄録

Tokyo Outer Ring Road opened in June 2, 2018 possesses the special semi-underground structure called trenched slit structure. Keiyo JCT intersecting Tokyo Outer Ring Road and the Keiyo road, all of the Ramps comprise a complex tunnel structure.This is a large-scale underground structure unprecedented in Japan. Therefore to secure safety, disaster preventing is being reinforced. We introduce about an example of the disaster preventing outline in trenched slit section and Keiyo JCT.