Over 40% of domestic tunnels have been in operation for more than 30 years! Construction work for leak prevention due to aging!
A "tunnel" refers to an artificial or naturally formed civil engineering structure that passes through the ground, such as underground, underwater, or through mountains, from the surface to the destination. It is defined as an elongated underground space in the axial direction compared to its height or width in cross-section. At the OECD Tunnel Conference in 1970, it was defined as "an underground structure established at a planned location with specified cross-sectional dimensions, regardless of the construction method, with a finished cross-sectional area of 2 m² or more." According to the Ministry of Land, Infrastructure, Transport and Tourism, the total number of tunnels nationwide, including expressways, national roads, and municipal roads, is approximately 10,300. Of these, about 4,800 were opened before 1982, and it is estimated that around 3,200 are over 40 years old. It seems that more than 40% of the tunnels nationwide have been in operation for over 30 years, and the aging of road infrastructure has become a nationwide issue. While road managers are advancing repairs, the high costs pose a significant barrier. *For more details, please refer to the PDF document or feel free to contact us.*
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【Case Study】 ■ Jinman Tunnel ■ Izumi City Hall (Kagoshima Prefecture): Assembly Hall GRG Raised Ceiling φ6,992xH1,070 (Nishimatsu Construction Co., Ltd.) *For more details, please refer to the PDF document or feel free to contact us.
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For more details, please refer to the PDF document or feel free to contact us.
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Izumi City Hall (Kagoshima Prefecture) The photo in the bottom right is before joint treatment.
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Environmental shaping refers to the creation of social and cultural spaces by adding artistic value to buildings. It is our hope that these creations can delight the eyes of viewers, soothe their hearts, and even inspire them. Our company's operations are structured around five pillars that align with this philosophy. 〇 Architecture Division Production of specialized decorative formwork, decorative materials for interior and exterior building finishes, displays, window frames, moldings, decorative columns, and more. 〇 Art Division Restoration and reconstruction of artworks, design and construction of reliefs, ceramic panels and walls, and various monuments. 〇 Civil Engineering Division Design, production, and construction of KB panel methods, tunnel entrances, retaining walls, wall surfaces, exterior walls, and the design of main pillars, handrails, and ground coverings that are the face of bridges. 〇 Styrofoam Processing Division Processing and molding of various types of Styrofoam. 〇 Barrier-Free Division Production and construction of barrier-free products such as ramps for eliminating steps, stepping stools, and impact-absorbing cushions.
