Design and construction method to repair embankment by crushed and compacted stabilized muddy soil in old small earth dam

It is said that many of old small earth dams are needed urgently to repair for damage and leakage, and to reinforce embankment in earthquake area. We need strong and impervious soil to repair such old small earth dams. However, it comes to difficult increasingly to promote repair construction because of the shortage of suitable material, recently. On the other hand, there is much of muddy soil piling up in such old small earth darns. That causes to reduce their function of water storage and water quality. Sometimes, muddy soil in reservoir is dredged and removed to recover their function. However, in case to dispose of soil, it is not easy to transport in that condition, because of high water content and very soft clay soil. Recently, it comes to difficult even to secure space to dispose of soil, because of the protection of environment and economy. Then our research group "EFFICIENCY IN REPAIR OF OLD SMALL EARTH DAMS" 'have developed "Embankment Method by Crushed and Compacted Stabilized Muddy Soil" as new construction technology that constructs sloping core zone for leakage control or the counterweight embankment with stabilized muddy soil. After stabilizing muddy soil with curing, crushing and banking, this material comes to be applicable to the embankment material, enough to have needed quality such as strength, impermeability and deformation. That makes it unnecessary to dispose of muddy soil and get new strong, impervious material for embankment. Now we can dredge and remove muddy soil, at the same time, repair and reinforce embankment. Therefore, it is expected to repair effectively the old dam embankment. This tentative guideline shows construction method to repair or reinforce embankment by "Embankment Dam Method by Crushed and Compacted Stabilized Muddy Soil" from the results of study and construction, laboratory testing procedure for mixing design, determining method of design strength, quality control test under construction, and so on.