ABILITY OF CONCRETE ANCHORAGE FOR GEOMEMBRANE BARRIER IN LANDFILL

摘要

In Japan, various types of geomembrane, such as HDPE, LLDPE, TPO(PE) and TPO(PP), are used as barrier sheet in waste landfill. The barrier sheet placed on the side slope is fixed on the berm and shoulder on the slope using concrete anchorage. In this study, small field tests to measure the anchor ability of concrete anchorage buried into trench for barrier sheet were conducted. Two types of gemembranes such as HDPE are LLDPE were used. The sectional size of concrete anchorage was changed as 1,600 cm2 and 2,500 cm2. The strength of wall and base of the trench was also changed by changing addition ratio of cement into loam. From the tests, it was found that (1) the maximum pull-out force was almost depend on the mass of concrete anchorage and (2) LLDPE sheet with low rigidity gave greater anchor ability than HDPE sheet with high rigidity.