記事概要

AND
OR
記事タイトル
大阪・関西万博 大屋根リングにおける照明設計と施工管理
発刊年月日
2026年5月 Vol.110 第3号
著者名
城越 陽平,高田 裕子,梅田 啓介,辻 佐代子ほか
企業・団体名
(株)大林組
記事種別
特集資料・講演など
抄録(ABSTRACT)
This report details the nighttime landscape lighting design for the “Grand Roof (Ring)”, a symbolic timber structure at Expo 2025 Osaka, Kansai, Japan. Under the design concept “Updated Nighttime Scenes in Lighting”, the project aimed to harmonize the immense scale of the architecture with the natural texture of the wooden framework.
The lighting scheme integrates several key elements: ground-floor base lighting for pedestrian safety, an AI-linked interactive control system for the skywalk, and autonomous “Illumi-grass” fixtures. A primary focus was placed on optimizing vertical illuminance to accentuate the traditional Japanese woodworking of the structure. Furthermore, the report discusses the practical challenges and solutions regarding construction efficiency in such a large-scale project.
By fusing advanced lighting technology with sophisticated control systems, this project achieved a distinctive and memorable nighttime environment. This paper provides a comprehensive overview of the technical processes-from conceptual planning to on-site implementation—that contributed to creating an inclusive and evocative atmosphere for a diverse range of international visitors.
図表タイトル

図1 大屋根リングの夜景(全景) Fig.1 Night view of the Grand Roof Ring (General view).
図2 大屋根リングの構成図 Fig.2 Structural diagram of the Grand Roof Ring.
図3 大屋根リングの照明方式(断面図) Fig.3 Lighting system of the Grand Roof Ring.
図4 照度分布とシミュレーション(グラウンドウォーク) Fig.4 Illuminance distribution and simulation for the ground walkway.
図5 進行方向による照明見え方の違い(グラウンドウォーク) Fig.5 Differences in lighting appearance by direction of travel (Ground walk).
図6 シーンごとの制御システムイメージ図 Fig.6 Conceptual diagram of the control system for different lighting scenes.
図7 二十四節気に合わせた季節色 Fig.7 Seasonal colors based on the 24 solar terms.
図8 AIカメラによる群衆検知状況 Fig.8 Crowd detection status via AI cameras.
図9 スカイウォークスポットライト点灯状況 Fig.9 Lighting conditions of the skywalk spotlights.
図10 スカイウォークの手摺り下照明 Fig.10 Handrail lighting for the Skywalk.
図11 照度分布とシミュレーション(グラウンドウォーク) Fig.11 Illuminance Distribution and Simulation (Ground Walk).
図12 2段屋根のライトアップ Fig.12 Illumination of the double-tier roof.
図13 ミャクミャクカラー(赤と青) Fig.13 MYAKU-MYAKU colors (Red and Blue).
図14 ジャパンカラー(赤) Fig.14 Symbolic Japanese Red.
図15 月ごとの色温度設定 Fig.15 Monthly color temperature settings.
図16 スロープ下照明と「イルミ草」 Fig.16 Lighting under the slope and “Illumination Plants”.
図17 「イルミ草」とそのシステム構成図 Fig.17 System diagram and appearance of the “Illumination Plants”.
図18 照度シミュレーション Fig.18 Illuminance simulation.
図19 1階スポット照明の取り付け角度調整 Fig.19 Adjusting the aiming angle of 1F spotlights.
図20 アッパーライト照明の取り付け角度調整 Fig.20 Adjusting the aiming angle of uplights.
図21 共通施工要領図 Fig.21 Standard installation details.

キーワード
新しい夜(照明コンセプト) | light pollution control | 光害抑制 | 木架構の演出照明 | 独立型照明システム | インタラクティブ照明制御 | interactive lighting control | standalone lighting system | “Updated Nighttime Scenes in Lighting” (Lighting Design Concept) | architectural lighting for timber Structures

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