ABSTRACT
Geotextile tubes are increasingly used in coastal protection structures. Typically, sand material is used as infill material in geotextile tubes as they provide good strength and stability. An alternative and sustainable solution is to use excavated soft soils to fill these geotextile tubes. Challenges to the use of soft soils are its low strength and its potential loss from the geotextile tube through the openings in the geotextile material. Thus, a small amount of flocculant or cement is needed. This paper presents the case study of a field trial where 6 geotextile tubes, infilled with lightly cemented recycled excavated soils, were installed onto the seabed using a high-capacity crane barge. Instrumentation such as strain gauges and shape array accelerometers were installed to monitor the performance of the bund during installation. Analysis of instrumentation data showed that lightly cemented recycled excavated soils is a viable infill material in geotextile tubes.
