Investigation of Damage Ratio of Low-pressure Gas Pipeline at the Improved Hill in Sendai City after the 2011 Great East Japan Earthquake

Abstract

Upon the Great East Japan Earthquake, the city gas suppliers in the Tohoku region suffered from tremendous damage, and 16 suppliers took measures to suspend supply to ensure security. Among them, at the Sendai City Gas, which stopped supply of approximately 360,000 houses, the damage of the low-pressure gas pipeline was concentrated in the improved hill. In this paper, we analyzed the damage of the low pressure gas pipeline at the improved hill considering the depths of cut and fill estimated from aerial photogrammetry.