UNDERGROUND TYPE PIT FOR PIPING STRUCTURE

摘要

PROBLEM TO BE SOLVED: To prevent the damage of a piping structure housed in a pit such as a fire-hydrant and an air valve even when ground displacement such as an earthquake is generated. SOLUTION: A cylindrical concrete wall 1, in which a fire-hydrant 4 upwards projected from a water service pipe 5 formed in the ground by excavating the ground from a ground surface and buried in the horizontal direction is housed, is provided. A cushioning material 2 capable of cushioning an impact at a time when the fire-hydrant 4 collides with the concrete wall 1 is installed around the side face of the concrete wall 1 on the outside of the pit 3.