kinobiru
kinobiru
気候変動問題に対して、建築をつくることで何が出来るでしょうか。 二酸化炭素を固定化できる素材として世界中で注目されている、 木材を多く使用した建築プロジェクトが千葉県鎌ケ谷市で進行中です。 このプロジェクトは、高層の木造共同住宅と、低層の木造商業施設を建設する、まちづくりの計画です。 二つの建物は構造体に木材を使用することで、二酸化炭素の固定化を図るとともに、地域の人々を呼び込み、 サスティナブル建築物の啓発を行うことを目的としています。2023年末の完成を目指して、現在建設工事が始まっています。
敷地は新鎌ケ谷駅からほど近い、街の中心部に位置します。鎌ケ谷市役所の向かいに位置し、前面道路は幹線道路で車や人の往来も多いエリアです。幹線道路沿いには大型ショッピングセンターをはじめ、多くの商業施設が建ち並んでいます。
kinobiruは、世界的にもほとんど前例の無い高層木造建築への挑戦です。 主に構造体として大量の木材を使用し、炭素貯蔵量（CO2換算）は約1,260.8t-CO2 に及びます。 本プロジェクトでは、合理的でメンテナンスにコストを掛けなくて済むような部材構成で、外壁の2時間耐火大臣認定を取得済みで、 近日大臣認定仕様オープン化される予定です。 この建物が高層建築物の新たなスタンダードとなり、地上45mクラスの建築計画に於いて、 今後は木造が選択肢の一つとなってゆくことでしょう。
kinobiru
Climate Change. Could architecture ever do more to solve this issue? Modern building projects today in Japan are now focusing on the use of timber as a sustainable material, in theory, that is, to fixate the Carbon atoms from Carbon Dioxide in stems of trees through the process of Photosynthesis.
The project is a community development project, the high-rise building will be an apartment, and the low-rise building planned in the same area will be a commercial facility, both built-in timber. It is aimed to reduce carbon footprint, and hope to inspire more people to build sustainable buildings in the area, acting as a precedential example.
The site is located in the heart of Shin-Kamagaya, close to Shin-Kamagaya Station. Many commercial facilities, including a large shopping center and the Kamagaya City Hall, is located on the opposite side of the site, which connects the main road that is also accessible from the main site.
“kinobiru“Project is a challenge to the limitation of timber architecture, which is still rare and almost unprecedented in the world. It has indeed been a challenging journey, nevertheless, we have realized the project with careful planning and thoughtful consideration for our visions in building a sustainable city of the future.
From a sustainability standpoint, to achieve a ZEH-M (Net Zero Energy House) rating, we have reduced the building's overall energy consumption by enhancing the insulation performance and installing energy-efficient equipment. Surprisingly, the load-bearing wall at the lower level to support the entire building structure requires a thickness of 420mm, can be used as insulation as well without the need for additional insulation material. As a result, the timber structure can reduce the cost of maintenance and maintain comfort within the building. Also, the building will be certified by the Ministry of Fire Protection to resist fire for two hours.
In the end, we are hoping this project will act as a catalyst for more architects and designers to choose over timber during their design process.