UNDERGROUND STRUCTURE AND CONSTRUCTION METHOD OF UNDERGROUND STRUCTURE

• Main Authors: KURANAGA RYOHEI, NAKADA SHINICHI, HARADA SHIN, FUKAWA TETSUYA, NAGAMITSU KENICHIRO, TAKAHASHI TOSHIYUKI, HATTORI YOSHIFUMI, TOYODA TSUTOMU, HIDAKA NAOTOSHI
• Format: Patent
• Language: English; Japanese
• Published: 29.08.2019
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; TUNNELS

To propose an underground structure and a construction method of the underground structure excellent in stability, durability, and earthquake resistance.SOLUTION: An underground structure 1 is provided with: a plurality of tunnels 2, 2,... cylindrically and parallelly arranged as being partially overlapped; a lining body 3 with a large cross section cylindrically formed over the plurality of the tunnels 2, 2,...; and a filler material 4 filled in a gap between the lining body 3 with the large cross section and an inner wall surface of the tunnel 2. The lining body 3 with the large cross section comprises: an SC lining body 5 made of steel concrete formed in the tunnel 2; and an RC lining body 6 made of steel concrete to connect adjacent SC lining bodies 5 to each other at a joint part of the adjacent tunnels 2. The SC lining body 5 has the same height as a design thickness of a lining body 8 with a large cross section, while main steel material is installed facing a ground mountain-side surface and an inner hollow side surface of the SC lining body 5.SELECTED DRAWING: Figure 2 【課題】安定性、耐久性、耐震性に優れた地下構造物および地下構造物の構築方法を提案する。【解決手段】一部を重ねた状態で筒状に並設された複数本のトンネル２，２，...と、複数本のトンネル２，２，...に跨って筒状に形成された大断面覆工体３と、大断面覆工体３とトンネル２の内壁面との隙間に充填された充填材４とを備える地下構造物１。大断面覆工体３は、トンネル２内に形成された鉄骨コンクリート造のＳＣ覆工体５と、トンネル２同士の接合部において隣り合うＳＣ覆工体５同士を連結する鉄筋コンクリート造のＲＣ覆工体６とを有している。ＳＣ覆工体５は、大断面覆工体８の設計厚と同等の高さを有しており、当該ＳＣ覆工体５の地山側面および内空側面に面した主鋼材が配設されている。【選択図】図２