Adopting "precast invert" for countermeasures against slab heave in heavily trafficked mainline tunnels!
We would like to introduce a case where our "precast invert" was adopted for the Bandaki Tunnel on the Nishinomiya-Kita Road in Hyogo Prefecture. The Bandaki Tunnel experienced bulging over a length of approximately 10 meters, but the site had no detour routes, making it difficult to impose a full-day traffic restriction on the bus route. As a result, a precast invert that allows for full closure at night and full opening during the day was adopted. By considering the shape of the components and installation methods according to the site conditions each time, construction can be carried out within the narrow tunnel and within the limited closure time. 【Overview】 ■ Location: Hyogo Prefecture ■ Completion: 2015 ■ Client: Hyogo Prefectural Road Corporation ■ Remarks: 10.5m *For more details, please refer to the PDF document or feel free to contact us.
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【Work Schedule】 ■ Start of road closure regulation (21:00～) ■ Demolition of temporary pavement and excavation (21:30～23:15) ■ Installation of precast slabs (23:15～1:15) ■ Filling of backfill mortar (1:15～2:45) ■ Installation of drainage pipes and backfilling (2:45～5:00) ■ Restoration of temporary pavement and cleanup (5:00～5:30) ■ Lifting of road closure regulation (5:30～) *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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Nihon Samicon Co., Ltd. has been engaged in research and development day and night as a specialized manufacturer of road disaster prevention, aiming to protect the safety of life and promote the development of the local economy. We have also promoted cost reduction, including maintenance, as well as labor-saving and efficiency-enhancing methods, and shortened construction periods. Additionally, we have provided products and methods that harmonize with nature. Moving forward, we will continue to learn from nature and contribute to the creation of a safe living foundation.