住宅密集地に近接した営業線の地下化切替え: 京王電鉄　調布駅付近連続立体交差事業

摘要

This report gives information about the connecting works of existing surface trucks to new underground trucks on the grade separation project near Chofu station that were implemented after the last train on 18th August, 2012. The works were to connect new underground trucks at three points: to truck for Shibasaki and one for Nishi-Chofu on the Keio line and one for Keio Tamagawa on the Sagamihara Line. Due to the fact that it was difficult to secure the site for temporary line for the switch, we took methods to switch directly above/under trucks combining crane remove and temporary girder raising and lowering according to the site conditions.%本稿は，平成24年8月18日の終電後に実施した調布駅付近連続立体交差工事における地下化切替工事のうち，地上との取付け部の工事について報告するものである.地下線への切替のため，京王線の柴崎方と西調布方，相模原線の京王多摩川方の3か所において地上線路から地下線路へ取り付ける工事を行った.今回の切替箇所は仮線用地を確保することが困難なことから，各切替箇所の現場条件に合わせて「クレーン撤去」「工事桁扛上」「工事桁降下」の3つの工法を組み合わせて線路直下切替工法を採川した.