Tunnel auxiliary construction method "AGF-Φ method"

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last updated：May 25, 2021

フジモリ産業

By using a dedicated guide tube, reliability and safety are improved! Furthermore, it achieves a low impact on the environment.

The "AGF-Φ Method" is an expanded type of AGF that adopts a "Dedicated Guide Support" with a dedicated guide pipe installed to facilitate the placement of AGF steel pipes for pre-tensioning by drilling holes in the web section of H-shaped steel supports. By using the dedicated guide pipe, the placement of the steel pipes becomes more accurate, improving construction precision. As construction precision improves, it becomes possible to reliably form an arch crown at the tip of the steel pipes, and since the pipes are left in the ground without cutting, there is no industrial waste generated. 【Features】 ■ Improved construction precision ■ Tension reduction effect ■ Reduction of industrial waste ■ Reduced cycle time *For more details, please refer to the PDF materials or feel free to contact us.

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【Other Features】 ■ The use of a dedicated guide pipe allows for precise placement of steel pipes, improving construction accuracy. ■ Improved construction accuracy enables reliable formation of the arch crown even at the tip of the steel pipe. ■ Since the steel pipes are installed from the support structure, beams are formed around the support structure, allowing loads to be supported by both the steel pipes and the support structure. ■ High-rigidity steel pipes are used up to the end point and left in the ground without cutting, ensuring a solid lap length is maintained. ■ The use of a dedicated guide pipe eliminates the need for preparatory work (surveying, marking, pre-drilling), allowing for a shortened cycle. *For more details, please refer to the PDF document or feel free to contact us.