Support System for Reinforcement and Restoration of Sewerage Facility against Earthquake Disasters in Considering Environmental Assessment

本研究探讨在考虑环境评估的情况下，发展一套支援系统，以加强和修复地震灾害下的污水处理设施。从这项研究中得到的结果总结如下。进行了小规模试验，以澄清使用砾石排水系统对液化地面流的有效性。试验结果表明，在砂土地基中加装砂石，受砂石排水刚度的影响，可减少地面流量。考虑到环境保护，在1993年钏路树地震后，在钏路市附近的石别查镇进行了供水和污水系统的恢复作业。调查了其运作的细节，并获得了对未来地震灾害有用的经验教训。对坦南地区居民和福井县地方政府进行了问卷调查，以调查他们在地震期间对水问题的认识状况。地震后，虽然居民们感到水的储备对他们的生活是必要的，但其数量是不足的。此外，1995年神户大地震后，虽然许多地方政府都在努力采取防震措施，但与先进的地方政府相比，其防震力度还是不足的。

This study deals with development of a support system for reinforcement and restoration of sewerage facilities against earthquake disasters in considerig environmental assessment. A summary of results obtained from this study are as follows.1. The small scale tests were carried out in order to clarify the effectiveness against the liquefied ground flow by using the gravel drain systems. Test results suggested that ground flow was reduced by installing the gravel in sandy ground under the influence of rigidity of gravel drain.2. The restoration operation of water supply and sewerage systems in consideration of the protection of the environment were carried out in Shibecha town near the Kushiro city ater the 1993 Kushiro-oki earthquake. The details of its operation were investigated and the lessons which will be useful against the future earthquake disaster were obtainedQuestionnaire surveys on inhabitaints of Tannan area and local governments in Fukui prefecture was conducted to investigate the state of their awareness against water problems during earthquakes. Although inhabitants feel that stock of water is necessary for their life after earthquake, its quantity is insufficiency. Furthermore, though many local governments make an effort to take measures against earthquake disasters after 1995 Kobe earthquake, its effort is insufficiency as compared with the advanced local governments regarding earthquake disaster prevention.