5.地震による水道管網の被害予測 : 三木市におけるケーススタディ

概要

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The emergency restoration and the earthquake-proof of pipeline is general as the disaster prevention measures in a water supply pipeline network system. And it is important to be predicting the scale of the damage and the location with a lot of occurrence of the damage to the assumption earthquake beforehand to draft an efficient effective plan. The region for this research was made into Miki City. And the damage prediction was performed as well as the situation was grasped. When the seismic intensity of the Great Hanshin Earthquake has happened in Miki City by the numerical value without liquefaction, pipeline damage prediction finds out that at least about 58 cases of damage occurs around the Midorigaoka junior high school. Damage prediction in whole Miki City will be a result as about 1394 cases, and PVC pipe damage accounts for about 76%. The damage ratio of this study was about 4 case/km more than the result of the water supply pipeline damage by the real earthquake in the past. Even if the damage can't be stopped from now on, we should decide not to make them expand. The water victim of an accident population and the restored number of days should be considered by the damage prediction result. It becomes important to secure necessary water quantity, materials and equipments according to that.