ため池の老朽化と耐震性(<特集>水・食料問題と地盤工学)

概要

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In Japan, there are more than 210,000 small earth-fill dams for agricultural irrigation, which have an embankment height of 10m or less, and almost all are located near cities. These pools have been maintained by regional management organizations for some 200 years, but at least 20,000 sites are deteriorating with age such as leakage and sliding. The cumulative numbers of damaged small earth-fill dams in Japan, from 1976 to 2004 is about 41,100. The complete dam failure occurs several times a year, but sliding and leakage have damaged most small earth-fill dams. Most of these small earth-fill dams for agricultural irrigation were built using empirical methods without design standard. Therefore, in order to make clear the earthquake resistance for over the 20,000 deteriorated dams, it is very important to develop the easy boring survey for its dike property and analytical method for earthquake resistance by using field investigation data.
2012-01-01