首都高速道路 大井ジャンクション

摘要

大井ジャンクションは，3月7日に開通し，中央環状品川線と既設の首都高速湾岸線を接続するジャンクションである.湾岸線から中央環状品川線に向かうAC連結路は，新設橋梁が2径間(70.8m),既設鋼床版橋の拡幅が1径間(62m)である.中央環状品川線から湾岸線に向かうBD連結路のうち，西行き方向のB連結路は13径間4橋梁(鋼構造が2橋(450m),PC構造が2橋(120m)),東行きのD連結路は8径間3橋梁(鋼構造が2橋(366.4m，PC構造が1橋(58.5m))で構成されている.橋脚数は鋼橋脚が3本，RC橋脚が17本で，基礎杭は鋼管ソイルセメント杭を多く用いている.%Opened to traffic on March 7, the Oi Junction connects the extant Metropolitan Inter-Expressway Bay Shore Route to the Shinagawa Line on the Central Circular Route. The A-C Section running from the Bayshore Route to the Shinagawa Line on the Central Circular Route involved the construction of a new bridge with two spans (70.8 m) and the widening of the existing steep deck bride by one span (62 m). The B-D Section from the Shinagawa Line on the Central Circular Route to the Bayshore Route involved the construction of the westward B Route-a13-span 4-bridge section (450 m of 2 steel bridges and120 m of 2 prestressed concrete bridges) -and the eastward D Route-an 8-span 3-bridge section (366.4 m of 2 steel bridges and one 58.5 m prestressed concrete bridge). Among the bridge piers, 3 are steel and17 are reinforced concrete, and steel pipe soil cement composite piles were used for a majority of the pile foundations.