Abstract
To evaluate a stability and presence or absence of abnormality of geogrid reinforced soil wall during construction or after construction, field observation which measures a strain of geogrid is carried out. Although a strain gauge has been generally used for strain measurement, it lacks durability, continuity of measuring point and ease of wiring. We develop an “optical fiber sensor geogrid” which optical fiber is inserted in geogrid as new method for strain measurement. This paper reports that it can evaluate a stability of the actual geogrid reinforced soil wall based on strain measurement by using the optical fiber sensor geogrid during construction and after construction.
