Research about the maintenance and replacement technique for the infrastructure by using microbes for the littoral region

本研究提出了一种基于微生物功能的建筑维修技术管理新方法。该方法可用于提高土体强度和原位保温控制。将该方法应用于日本和斯里兰卡滩岩的野外调查，并进行了分析。此外，还进行了人工滩岩地层的实验室试验。这项研究产生了两个主要结果。首先，发现钙、镁、二氧化硅和铁可以作为滩岩的水泥物质。此外，方解石被发现是来自日本熊岛和斯里兰卡的海滩岩中最有效的水泥物质。(2)发现从海带分离得到的水浒孢菌（Sporosarcina aquimarina）具有改善土壤强度和提高土壤液化强度的作用。

In this study, a new management method for construction and maintenance technology based on microbial functions was developed. This method can be used to improve soil strength and in-situ water insulation control. This new method was applied and analyzed in a field survey using beachrock from Japan and Srilanka. Further, laboratory tests using artificial beachrock formation were carried out.Two main results arose from this study. First, it was found that calcium, magnesium, silica, and iron are acceptable as cement substances of beachrock. Further, calcite was found to be the most effective cement substance of beachrock originating from Kumejima Island, Japan, and Sri Lanka. Second, it was found that the bacterium Sporosarcina aquimarina, which is isolated from marine zones, is effective in improving soil strength and increasing soil liquefaction strength.