LOMG-TERM FIELD TEST CONCERNING THE INFLUENCE OF THE DEFORMATION OF CONCRETE STRUCTURES TO THE WATERPROOFING PROPERTIES OF GEOSYNTHETIC CLAY LINER ( GCL )

Geosynthetic Clay Liner (GCL) is used as preventive measures against water leakage from bodies of storage reservoirs,ponds of parks and so on. These facilities are generally accompanied with concrete structures such as channels, boxes and/or box culverts. The deformation of these structures by subsidence or skid due to huge earthquake arises gaps in joint part of these structures, leading to water leakage. To understand how the waterproofing properties of GCL changes over time, we measured the amount of leaked water during one year with test structures with artificial opening in joint part covered with GCL. As the result, we confirmed that GCL has equivalent or better waterproofing properties compared with the clay liner as preventive measures of water leakage caused by deformation and/or cracks of concrete structures.