Abstract
The geomembranes used as a component of a liner system in waste landfill are occasionally deformed and occurred a tensile strain by non-uniform settlement and machine working. In this paper, the tensile strain of geomembranes is measured by the simple tensile loading test using optical fiber sensing in order to build a monitoring system to check extreme deformation. From the experimental results, it is confirmed that the tensile strain of sheets can be measured using optical fiber sensing.